US775963A - Automatic magic-lantern apparatus. - Google Patents

Description

PATENTED Nov. 29, 1904.

M. BENTZON. AUTOMATIC MAGIC LANTERN APPARATUS.

APPLICATION FILED OGT.12, 1903.

.-N0 MODEL.

fiwelzfor Wlinesses.

PATEN'IED NOV. 29, 1904.

M. BENTZON.- AUTOMATIC MAGIC LANTERN APPARATUS.

APPLICATION FILED OCT-12. 1903.

5 SHBETS-SHEBT 2.

.NO MODEL.

Ewe/2Z0)". WWW PM No. 775.963. PATENTED NOV. 29, 1904.

M. BENTZON. AUTOMATIC MAGIG LANTERN APPARATUS APPLICATION FILED OUT. 12, 1903.

H0 MODEL. 5 SHEETEP'QHEET 3.

PATENTED NOV. 29, 1904.

M. BENTZON. AUTOMATIC MAGIC LANTERN APPARATUS.

APPLICATION FILED OGT. 12, 1903.

5 SHEETS-SHEET 4.

vN0 MODEL Min/5 52565 /1 /QZW @(MLAM PATBNTEDJNOV. 29, 1904.

M. BENTZON. AUTOMATIG MAGIU LANTERN APPARATUS.

APPLICATION FILED OUT. 12, 1903.

R QF EBTS-SHEET 5. A

E10 MODEL.

WQJLW (5 NlTE Stars Patented November 29, 1904.

l n'rhivr tries.

AUTOMATlQ MAGlG-LANTERM APPAHATU%.

SPECIFICATION forming part of Letters Patent No. 775,963, dated November 29, 1904.

Application filed October 12, 1.903- Scrial No. 176,661. (No model.)

To It whom 111; vim/y concern.-

Be it known that I, MALooLM BEN'lZON, a subject of the King of Great Britain, residing at 126 Queens Gate, SouthKcnsington, London, England, have invented new and useful Improvements in Automatic Magic-Lantern Apparatus, of which the following is a speciiication.

My invention is for an improved apparatus whereby pictures may be projected by rays of light onto a screen after the manner of a magic lantern, and has for its object the pro I d action of novel and effective means for aceom plishing this end by mechanism and devices capable of being operated by manual, electrical, or other power in such a manner that a picture, a predetermined number of pictures, or a number of series each containing a predetermined number of pictures can be automatically exhibited upon the machine being set to work by coin-freed apparatus or by other means and which may be employed for amusement, instruction, or advertising.

In the accompanying drawings, Figure l is a sectional front elevation of apparatus con structed according to my invention and designed to be put into operation by the insertion of a coin therein. Fig. 2 is a sectional plan thereof. Figs. 3 and 4 are respectively sections on the lines 3 3 and i 4;, Fig. 1. Fig. 5 is an end elevation of a portion of the apparatus. Figs. 6 and 7 are elevations of cams. Fig. 8 is a sectional front elevation of the apparatus designed more particularly for advertising purposes. Fig. 9 is a section on the line 99, Fig. 8. Fig. 10 is a sectional front elevation of the apparatus designed to be operated by hand. Fig. 11 is a section on the line 11 11, Fig. 10. Fig. 12 isa plan of adetail of the apparatus shown in Figs. 10 and 11, and Fig. 13 is an elevation of another detail thereof drawn to an enlarged scale.

Like letters indicate corresponding parts throughout the drawings.

In carrying out my invention, which i will describe first by reference to Figs. 1 to 7, I provide in a case a, which may be fixed against a wall or to any suitable support and may sometimes have the external appearance of a miniature stage, a lantern 7), having ob ective and condensing lenses 0 (Z for projecting transparent pictures onto a screen 6, of any suitable mate rial. I arrange the screen preferably in the front of the case, as shown clearly in Figs. 2 to t, and the lantern parallel therewith, a n1irrorf' or other reiiecting-surfaee being employed to reflect the pictures onto the screen. By this arrangement I provide an apparatus of less depth than would be the case if the pietures were projected directly onto the screen. Within the case a and near and parallel with the back thereof and with the lantern l. provide a tray or platform g. This tray is provided with wheels g, running upon rails and is arranged to be intermittently moved longitudinally in either direction by a screw it engaging a nut h under the said tray and contains in suitable spaces 5 between equidistant vertical divisions a number of pieture-slides vi, the said tray being arranged to be brought into such a position by the screw it that one of the picture-slides i can be moved or slid into grooves 1" in the usual space '11 in the lantern for exhibiting and afterward be restored to its space or division in the tray 9 when the picture has been exposed for a given period. To insure the easy entry of each picture into the lower groove v1, I provide a roller 27", Fig. 3. Each intermittent movement of the tray agrees exactly with the distance from center to center of the spaces 9, so that whenever the tray comes to rest a slide is always in the correct position for insertion into the space if. For moving the picture-slides I employ two depending arms Z: Z Figs. 1 and 3, arranged to slide upon a bar A5, the arm Z serving to move the slides from the tray into the space 1: and the arm Z." serving to return them to the said tray. The arm A: is reeiprocated by a lever 1, connected to the said arm and fulcrumed at l, the arm is being moved by the arm Z through the medium of a spring h when the latter arm is moved to push a slide from the tray and returned to push the slide back onto the tray by means of a red A", connected to the lever I. As owing to wear and tear of the joints of the connection I to the arm is and of other cooperating parts the slides 5 might be left projecting from the side i of the tray nearest the lantern, I provide for moving the lever [farther than is actually required for returning the slide to the tray, and I arrange to stop the arm 7t" before the lever Z has finished its movement. This is eflected by the employment of a stop in", with which the said arm makes contact, a spring in being interposed between nuts lion the rod if and a lug it' on the said arm, through which the said rod passes. For oscillating the lever l I provide a double cam m m. on a shaft m the cam part m acting upon the lever to move the picture-slides from the tray to the lantern and the cam part 122/ acting upon the said lever to return the slides to the tray. The shaft m is driven from a suitable motor, such as an electric motor 92, Fig. 1, through the medium of the belt a, pulley n pulley 02 belt 22 pulley a, shaft 11", worm n, Worm-wheel n clutch part a attached to the wheel of, and clutch part a", in sliding connection with the shaft m As it is essential that when each slide is returned to the tray the arms In it" should be moved slightly in the opposite direction to free the arm Z1 from the slide and yet not suflicient to bring the arm in back into contact with the slide in order that the tray may be free to be moved longitudinally, I provide the cam m with an elevation m and the cam m with a corresponding depression bf. These cams are shown detached in Figs. 6 and '7. To prevent a blank disk of light being shown on the screen during the time a slide is being moved into or out of position for exhibiting, I arrange a shutter Z) in front of the objective-lens and pivoted at b and provided with an arm 7) against which a pin 7) on the arm A" strikes as the latter moves when a slide is passed into the space 2' so as to move the shutter out of line with the said lens. For intermittently moving the tray 9 I provide the screw it with a ratchet-wheel 0, designed to be operated by a pawl 0 from a cam 0 on the shaft on through the medium of a lever 0 rod 0*, lever 0", and link 0, the pawl being carried on an arm 0 loose on the screwshaft h. The ratchet-wheel 0 is so designed that each reciprocation of the pawl in one direction turns the screw /2, so as to move the tray a distance corresponding with that be tween the centers of two adjacent slides.

As already stated, my improved apparatus can be arranged so that a number of series of pictures, each series containing a predetermined number, can be exhibited. This arrangement is illustrated in Figs. 1 to 7, the apparatus containing twelve series, each consisting of six pictures, a handle p being provided for enabling the user to operate the tray g untila pointer 19, Working overa scale ordial 3 indicates the number of the particular series he requires exhibited, the said pointer being driven by gearing 12 from the screw-shaft 72 This handle 19 is arranged to rotate a sprocketvvheel p in the manner hereinafter described, which Wheel through the medium of a chain the tray g along being caused to move into the position indicated by the dotted lines in Fig. 3 by the tail 0 coming into contact with the under side of one of the rails or any equivalent stop.

hen my invention is used in connection with coin-freed apparatus, as in Figs 1 to 7, and which may be of any suitable kind, the mechanism is so arranged that only when a coin is passed into the coin-slot Q can the handle p be operated. For this purpose thehandle p is not directly connected to the sprocketwheel p, but is arranged to operate the latter by the following mechanismthat is to say, the handle and the sprocket-wheel p are respectively connected to bevel-wheels p and p turning upon a shaft 1). The latter carries a sleeve 1), havingaspindle p on which is mounted another bevel-wheel, 1), gearing with the wheels gfp So long as no resistance is offered to the wheel p it will when the handle 1) is rotated gyrate around the shaft 2 without moving the sprocket-wheel p; but if a stop be placed in its path, so that it can gyrate no longer, the bevel-wheel p and consequently the sprocket-wheel 11 will be rotated. This stop I arrange in the form of a pin '1" on a lever w, connected to a lever 1-", carrying the coin-receptacle r so that when the latter moves down under the weight of a coin the said pin is placed in the path of the spindle 29 carrying the wheel so that if the handle be turned the said spindle will come into contact with the said pin and the sprocketwheel 12 will be operated to move the tray 9. The coin-receptacle lever '2' is pivoted at 1'" and carries a link 1 which engages a pivoted pawl or stop 1*", normally in engagement with an abutment r on a pivoted stop-plate W, to which is connected a handle r outside the apparatus and which 1 term the starting-handle. This handle is connected with mechanism for starting the apparatus and when the apparatus is not in use is in the off position, (shown by the full lines in Fig. 5,) it being maintained or locked in the said position by reason of the engagement of the stop with the abutment r. W hen, however, a coin is inserted into the coin-receptacle, the latter consequently moves down and lifts the stop 1" out of engagement with the stop-plate 1' and allows the starting-handle r to be moved into the on position. (Shown by the dotted lines, Fig. hen the desired number of the series to be exhibited has been obtained by the handle 1), the starting-handle r is then moved from the off to the on position, carrying with it the stop-plate r upon which is a pin 2". The coin-lever r or its pivot-shaft is provided erases.

with an arm 1' which impinges against the pin a" when the lever r" is in its lowered position. Consequently the first movement of the starting-handlc r will cause the coin-lever to bedriven upward, and thereby discharge the coin from the bucket in a known manner and at the same time raise the pin r out of contact witlr the spindle p of the bevel-wheel so thatthe handle 2) is rendered inoperative and no further movement of the tray 1 and the the total number of series, and I so connect it with the indicator that unless the latter correctly points to the required series the appa ratus cannot be put into action. For this purpose I provide a roller or pin 8*, carried by a lever at to engage the said notches. The said lever carries a hinged spring extension-piece s", the lower end of which can pass over a projection s on the stop-plate r hereinbefore describedgwhen thelatter is in the position shown in Fig. 4. The notches correspond with the figures on the dial ofthe indicator. it will be seen, therefore, that until the roller or pin is in a groove the starting handle or lever r cannot be operated. For throwing the clutch part a into gear with the clutch part a tostart the apparatus to exhibit a series of pictures, the starting-handle r is connected, through the medium of a lever enrod a, bellcrank a and rod trite a levert on a shaft carrying a fork Z engaging the clutch part a", so that when thesaid handle is moved from the off to the on positionit will engage the said clutch parts together and drive the shaft of a pivoted hook a being provided which engages a pin it on the said lever 25 to keep the parts of the clutch engaged while the series of pictures is being exhibited. To disengage the hook when the series has been exhibited, l provide a disk t on a shaft 1' operated by suitablyproportioned gear-wheels I from the shaft m the saiddisk having a pin t which at a certain part of the rotation of the disk comes into contact with and moves a lever 25, connected to the hook t, and so lifts the latter out of engagement with the pin t on the lever and allows the said lever z to disengage the clutch parts by the'traction of a spring The disk 25" is further provided with a notch into which passes an arm I on the shaft and thus instantaneously stops the apparatus. The bell -crank 1/7 is arranged, as shown. to operate a tumbling (or other) switch r by a lever r" to complete the electric circuit, including the motor a, the circuitbeing again broken on the reverse movement of the bellcrank when the series of pictures has been exhibited. Where an electric lamp is employed in the lantern, it may be included in the same circuit as the motor, i s to becut in or outol' thecircuit simultaneorisly with the said motor.

Forthe purpose ofpriwenting the fraudulent use of the apparatus by retaining the starting handle'in its on position, so as to keep the clutch parts a a" in gear. i provide the following ar-= rangement-----that is to say, therod a .l arrange to slide in guides and connect itto a spring 11% When the rod;

which tends to draw it upward is pulled downward by thesti.rting-handle if. a bent arm n, pivoted on the rod a; eng a pin a on one end of thc l'ielhcrahkIn,

and

so enables the latter to .be operated. as herein-1 beforedescribed, to engage the clutch parts a la/fl. The bent arm '.a"-isprovided with an exteii siolrrd, which comes into. contact with a lixed stop it? and throws theend of. the bent arm a out of contact with thetpin in on the bell-crank- As thelbent arln drscornli-i a stud a thereon passes beneath an it icl i and tn inl iler a and when it ascends it travels on the outside of the latter. tiy this arrangcnicnt the bent arm canonly be brought into operation .on the downstroke and is disengaged thereries of pictures has been exhi bited-Qhvh'cn the: tray giwill be at one end of its traveh'lit will. ibe neccssary to. turn the handlep so as to. move the tray. back in order to exhibited: other series, and assuming that a. further coin. hasbeen inserted to operate the mechanism before the handle is so moved i provide nieaus whereby the .startinghandle is prevented froinbeing worked (whereby the coin mutt be discharged from the receptacle 1", as hereinbefore described) until such time as the tray has been moved back to the series required. In order to accomplish this, Il attach to the pawl r a springr'; and l place on the notched wheel s a pin or stud n in such a po. sition that it'will come into contact with the said spring when the last series of pictures is being exhibited, so that the pawl r' is prevented from rising out of engagement with the abutment on the plate under the weight of the coin in the coin-recinitaclc. in order,.

however, that the coin-receptacle can move .down sufficiently to place the pin w in the path of the spindle 9, so that the handle 71 can be operated to move the tray back to the series of pictures required, 1 slot the link i erator in correctly placing the indicator.

In the arrangement of apparatus illustrated by Figs. 8 and 9 and which is more particularly adapted for advertising purposes, I dispense with the coin-freed starting and indicating apparatus, already described with reference to Figs. 1 to 7, and aclock or other timing mechanism may be used to switch on or off the electric current for the electric motor and lamp where such is used. The parts of the said apparatus I designate by the same signs as those used in describing Figs. 1 to 7, but with the addition of the letter a as or in addition to the index-sign. In this arrangement the shaft 25 and gear-wheels 2? described in connection with the arrangement illustrated in Figs. 1 to 7 are dispensed with, the disk t being placed upon the shaft 727/ so that the whole series of picture-slides on the tray 9 are exhibited in consecutive order. For automatically returning the tray 9 to its initial or starting position after all the slides have been exhibited, and so that they can again be exhibited, I provide the following arrangementthat is to say, I arrange on the worm-shaft n a pulley w for transmitting motion by means of a belt or cord 1/ to a pulley w loose on the screw-shaft if, the said pulley being connected with the one part, m

of a friction-clutch, the other part of which,

w, is in sliding connection with the screwshaft it and is pressed toward the" part :0 by a spring 1. the said parts when in engagement serving to rotate the screw-shaft /t to return the tray 9 to its starting position at a velocity relatively high as compared with that at which the shaft rotates when exhibiting the pictures. The clutch part 00 is provided with a pivoted clutch-fork {66, designed to be operated to disengage the parts of the clutch, as hereinafter described. The fork t of the clutch part 229 on the shaft m carries the arm t to engage the notch in the disk t and it also carries the pin 25*, with which the pivoted hook t engages. The said clutch fork is also forked at its lower end and engages a pin [1' on a tumbling weighted lever 50*, the lower end of which serves, when the tumbler 111 is in one extreme position, to strike the clutch-fork .2" and disengage the clutch parts 1 and (If, so as to stop the rotation of the shaft it and at the same time operate the clutch-fork 2 to engage the parts 71 and a of the clutch on the shaft m and rotate the latter. In order to hold the clutch part out of engagement with the clutch part a during the time the tumbler is moving out of contact with the fork (0 when moving from one extreme position to the other, I provide a pivoted hook :20, designed to engage a pin 0 on the said fork a, which hook, however, is disengaged by the tumbler during such movement, the said tumbler being provided with an arm 50, which comes into contact with an upward extension 0 of the hook 50 as shown clearly in Fig. 8. The operation of the said clutches is effected by the tray g when at the extremes of its movement in either direction, and for this purpose I provide it with a bar or rod y, one end nected by'a rod g to the clutch-fork 25, while the other end of the bar y is designed to impinge against one arm of a bell-crank g the other arm of which is connected by a rod y* to the pivoted hook 6 By this arrangement it will be seen that, assuming the parts to be in the position shown in Fig. 8, in which the tray g is indicated as moving back in the direction of the arrow to its initial position, when the tray arrives at the said position the bar 3 will impinge against the lever y and move it and the clutch-fork t to the position indicated by the dotted lines, whereby the clutch parts 12 and a will be engaged to rotate the shaft on? and exhibit the slides in consecutive order and intermittently rotate the shaft it, as hereinbefore described, and the tumbler a will also be moved to the dotted-line position to disengage the clutch parts and \Vhen the tray 9 arrives at the other end of its movement, the bar y will impinge against the bell-crank 3 and move the hook 23 to release the clutch-fork t, which will be pulled back by the spring y anddisengage the parts of the clutch of n? and at the same time move the tumbler back to the position shown in full lines to release the clutch-fork T and allow the clutch parts .11 and a? to reengage by means of the spring (/1 so that the screw 76 will be rotated by the pulley a to again return the tray 9 to its initial position. In cases where it may be necessary to exhibit a smallernumber of lantern-slides, and consequently to return the tray to its initial position before it has completed its full travel, I form the bar y so that it can be lengthened so as to operate the bell-crank earlier than would be the case ,if the full number of slides were used. For this purpose I form the bar in two parts which may be relatively adjusted by means such as setscrews in the one part engaging a slot y in the other part.

The arrangement of apparatus illustrated in Figs. 10 to 13 is designed to be operated by hand and is intended for use more particularly in the class-room, the lecture-hall, or the home circle. The parts of this apparatus I designate by the same signs as those used in describing Figs. 1 to 7, but with the addition of the letter I) as or in addition to the indexsign. In this arrangement the shaft m is oscillated (instead of rotated, as hereinbefore described) by means of ahandlez outside the case a, limited in its movement by stops 2. The lever Z" is loosely pivoted upon one end of the said shaft and is designed to be oscillated to move the arms is it by an arm .2, attached to the shaft m the said arm being vvaeea provided with a slot .2 engaging a pin .2 on

the lever I, so that assuming the parts to be in the position shown by the full lines in Fig. 11, in which the pin z is located at one end of the slot .2 if the lever be moved to. the left it will be moved a certain distance determined by the length of the slot .2 before the lever l" is moved. This interval between the starting of the levers and that of the lever l allows the tray g to be fed by the screw /1 to bring a picture-slide into position for exhibition. For effecting this feeding movement the cam 0 on the shaft m is in the form of an arm bent at the outer end to form a surface? concentric with the center of the shaft m and I arrange a pivoted lever .2 one end of which bears against the said cam, as shown in Fig. 11, to be operated in one direction thereby, it being operated in the reverse direction by a spring .2. The other end of the lever is provided with a segment of teeth, which engage a pinion .2 Fig. 13, loose on the screwshaft 723. The pawl 0" for operating the ratchet-wheel 0 (which in this arrangement has only one tooth) is carried upon a disk .2, fixed to the pinion 2 By this arrangen'ient during the interval between the starting of the lever .2 and the moment when the lever Z commences to move the cam operates the lever to rotate the shaft it by means of the pinion .2, disk 4, and pawl 0, the lever riding against the concentric portion .2 of the cam, while the lever Z" is operating thearms 1:" k to move a picture-slide into the lantern. In order to move the arm Zv slightly back out of contact with the picture-slide it has been moving in the tray, as hereinbefore described, I provide in this arrangement a spring-block a, working in a guide on the arm is" and designed to come into contact with a fixed stop 2' so that directly the handle .2 is released after the return movement the said arm Z1" will be moved slightly toward the lantern, and consequently move the arm a clear of the slide, the pressure of the said spring-block beingsuch that it overcomes the pull of the spring .2 on the lever .2 The handle p in this arrangement is connected to the screw-shaft it" through the medium of gear-wheels .2 and serves to move the tray, so as to bring any slide into position for exhibition, each slide having a corresponding number on the indicator-dial instead of each series, as in the arrangement illustrated in Figs. 1 to 7. In order that the shaft l1 may not be operated by the handle during the movement of the handle .2, I arrange the said handle p independentof but adapted to drive the shaft p for instance, by means of a slot Fig. 12, in the said handle engaging a pins on the said shaft--and I provide that unless the handle 72 is removed from the said shaft the handle cannot be operated. For this purpose I attach to the lever an arm .2, the lower part of which forms a shutter curved shaft.

crmcentricrlly with the axis of the pivot of the said lever. so that during the movement of the latter it will cover the holes. through which the handle 21" is inserted to engage the When, however, the lever .2 is in the position shown in Fig. ll. a hole 2 with which the said shutter is provided, coincides with the hole .2 and allows the handlep" to be inserted and operate the tray to bring another slide into position for exhibition. The indicat-or in this arrangement I have shown in the form of a rotating dial 71 within the case a), instead of a pointer working over a dial, as in the arrangement shown in Figs. 1 to 7, the number on the dial being visible through a hole 2" in the case c.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is-- l. T he combination with an inclosing casing of less depth than width and having atranslucent screen in its front face, of a lantern disposed transversely within said receptacle and a single reflecting-mirror in rear of said screen and in line with the lenses of the lantern, substantially as described.

2. The combination with an inclosing casing of less depth than width, and having ascreen in its front face, of a lantern disposed transversely within said receptacle, a single reflecting-mirror in rear of said screen and in line with the lenses of the lantern, a movable picture-slide carriage located on the side of the lantern opposite the screen, means for moving said carriage longitudinally with respect to the lantern, and transferring mechanism for moving the slides from said carriage into and out of the lantern, substantially as described.

3. The combination with an inclosing casing of less depth than width and having a screen arranged centrally of its front face, or wall, of a lantern arranged within said casing and disposed transversely thereof and at one side of the center of the casing, a reflector arranged in rear of the center of said screen and in line with the lenses of the lantern, a traveling picture-slide carriage arranged on the side of the lantern opposite said screen, means for traversing said carriage longitudinally with respect to the lantern and mechanism for transferring the slides from said carriage into and out of said lantern, substantially as described.

4C. In a picture-projecting apparatus, the combination with a lantern, of a longitudinally-movable carriage arranged adjacent to said lantern, mechanism for moving said carriage longitudinally to bring the picture-slides carried thereby into position to enter the lantern, a transferring mechanism for moving said slides into position in the lantern and moving them back into said carriage and handoperated mechanism connected with said carriage-operating mecl'lanism for moving said carriage to bring any particular slide into operative position with respect to said transferring mechanism, substantially as described.

5. In a picture-projecting apparatus, the combination with a lantern, of a longitudinally-movable picture-slide carriage arranged at one side of the lantern, a feeding-screw for imparting a longitudinal movement to said carriage, mechanism for intermittently operating said screw in a predetermined manner and feeding said carriage to bring the pictureslides successively into operative position with respect to the lantern, independent hand-operated mechanism for said screw to bring any particular slide into operative position and a horizontally-reciprocating transferring mechanism for moving said slides into the lantern and restoring them to the carriage, substantially as described.

6. In a pictureprojecting apparatus the combination with a lantern, of a longitudinally-movable picture-slide carriage arranged at one side of the lantern, afeeding-screw for imparting a longitudinal movement to said carriage, mechanism for intermittently operating said screw in a predetermined manner and feeding said carriage to bring the picture-slides successively into operative position with respect to the lantern, mechanism for operating said screw in a reverse direction and a horizontally-reciprocating transferring mechanism for moving said slides into the lantern and restoring them to the carriage, substantially as described.

'7. In picture-projecting apparatus or the like the combination with the lantern of a carriage adapted to move longitudinally at one side of the lantern, of a screw engaginga nut of the carriage, means for intermittently rotating the screw a predetermined distance, a transferring devicecomprising: arms depending from a bar upon which they slide for moving the pictures into and from the lantern, and means for operating the said transferring device independently of the carriage traversing mechanism, substantially as described.

8. In picture-projecting apparatus the combination with the lantern of a carriage adapted to be moved longitudinally of the said lantern and to carry two or more series of pictures, of mechanism adapted to be operated by hand for bringing any one of the said series into proximity to a device for transferring the pictures into and from the lantern and of automatic mechanism for traversing the carriage for bringing the several pictures of the series successively into position to be transferred, substantially as described.

9. In a picture-exhibiting. apparatus, the combination with a lantern, a longitudinallymovable picture-slide carriage arranged at one side of the lantern, mechanism for feeding said carriage longitudinally, a pair of depending arms arranged to reciprocatehorizontally, for transferring. the picture-slides from said carriage to and from the lantern and operating mechanism for said arms having provision for permitting said arms to move with respect to each other, to facilitate the releasing of the slides, substantially as described.

10. In a picture-exhibiting apparatus, the combination with a lantern, a longitudinallymovable picture-slide carriage arranged at one side of the lantern, mechanism for feeding said carriage longitudinally, a pair of depending arms arranged to reciprocate horizontally, for transferring the picture-slides from said carriage to and from the lantern, an operatinglever connected to one of said arms, a yielding connection between said lever and said second arm and a stop for arresting said second arm on its return movement to permit said arms to separate and release the slide, substantially as described.

11. In a picture-exhibiting apparatus, the combination with a lantern, a longitudinallymovable picture-slide carriage arranged at one side of the lantern mechanism for feeding said carriage longitudinally, a pair of depending arms arranged to reciprocate horizontally, for transferring the picture-slides from said carriage to and from the lantern, an operatinglever connected to one of said arms, a yielding connection between said arm and the second arm for moving it in one direction, a yielding connection between said lever and said second arm for moving it in the other direction and a stop for arresting said second arm on its return movement to permit said arms to release the slides, substantially as described.

12. In a picture-exhibiting apparatus, the combination with a lantern and a pivoted shutter for obstructing the lenses thereof, of a longitudinally-movable picture-slide carriage arranged at one side of the lantern, mechanism for moving said carriage longitudinally, a reciprocating transferring device for moving said slides from the carriage into the lantern and returning them to the carriage and a part on said transferring device for engaging said pivoted shutter and moving it out of line with the lenses of the lantern when a slide is transferred to the lantern, substantially as described.

13. In a picture-exhibiting apparatus, the combination with a lantern, of a longitudinally-movable pictureslide carriage arranged at one side of the lantern, a horizontally-movable transferring device for transferring a slide from the carriage to the lantern and returning it to the carriage-actuating mechanism for said transferring device, a startinglever for said actuating mechanism and mechanism for preventing the operation of said starting-lever until one of the slides is brought exactly into operative position with respect to the transferring device, substantially as described.

14. In a picture-exhibiting apparatus, the combination with a lantern, of a longitudi- IOC nalLv-movable picture-slide carriage arranged at one side of the lantern, a horizontallynnovable transferring device for transferring a slide from the carriage to the lantern and returning it to the carriage, actuating mechanism for said transferring device and for said carriage, and independent hand operated mechanism for moving said carriage to bring a particular slide into operative relation with the transferring device, a starting-lever for said actuating mechanism and mechanism for preventing the operation of said starting-lever until a slide has been brought exactly into operative relation with the transferring device, substantially as described.

15. In a picture-exhibiting apparatus, the combination with a lantern, of a longitudinally-movable picture-slide carriage arranged at one side of the lantern, a horizontally-movable transferring device for transferring a slide from the carriage to the lantern and returning it to the carriage, actuating mechanism for said transferring device and for said carriage, and independent hand operated mechanism for moving said carriage to bring a particular slide into operative relation with the transferring device, a starting-lever for said actuating mechanism provided with a projecting arm, a rotary disk operatively connected with the carriage-feeding mechanism and provided with a series of notches, a pivoted detent-lever having a part for engaging said notches and a part for engaging the arm connected with the starting-lever to prevent the operation thereof until a selected slide in said carriage is brought exactly into operative relation with the transferring device, substantially as described.

16. In a picture-projecting apparatus, the combination with a lantern, of a longitudinally-movable picture-slide carriage arranged at one side thereof, a transferringmechanism adapted to move the slides into the lantern and return them to the carriage, mechan* ism for transferring the carriage, a motor for operating said transferring mechanism and carriage-traversing mechanism, a starting device for connecting said motor operatively to the mechanisms operated thereby and devices for automatically disconnecting said starting device from the mechanism which it controls as soon as it has performed its function, substantially as described.

17. in a picture-projecting apparatus, the combination with a lantern, of a longitudinally-movable picture-slide carriage arranged at one side thereof, a transferring mechanism adapted to move the slides into the lantern and return them to the carriage, mechanism for traversing the carriage, a motor for operating said transferringmechanism and carriage-traversing mechanism, a clutch for connecting said motor with the mechanisms operated thereby, a starting device, operatively connected to said clutch and mechanism interposed between a part of said starting device, and the said clutch for automatically disconnecting-said parts, substantially as described.

18. In a picture-projecting apparatus, the combination with a lantern, of a longitudinally-movable picture-slide carriage arranged at one side thereof, a transferring mechanism adapted to move the slides into the lantern and return them to the carriage, mechanism for traversing the carriage, a motor for operating said transferring mechanism and carriage-traversing mechanism, a clutch for connecting the said motor with the mechanisms opera-ted thereby, a switch controlling the motor, a starting device and connections between said starting device and said switch and said clutch for operating the same and automatically disconnecting said starting device therefrom, substantially as described.

19. In a picture-prejecting apparatus, the combination with a lantern, of a longitudinally-movable picture-slide carriage arranged at one side thereof, a transferring mechanism adapted to move the slides into the lantern and return them to the carriage, mechanism for traversing the carriage, a motor for operating said transferring mechanism and earriage-traversing mechanism, a starting device for connecting said motor with the mechanisms to be operated thereby, mechanism for automatically disconnecting said starting device, and independentmechanism for traversing the carriage to bring a particular slide in line with the said transferring mechanism, substantially described.

20. In a picture-projecting apparatus, the combination with a lantern, of a longitudinally-movable picture-slide carriage arranged at one side thereof, a transferring mechanism adapted to move the slides into the lantern and return them to the carriz'zge, mechanism for traversing the carriage, a motor for operating said transferring mechanism and carriage-traversing mechanism, mechanism for connecting the motor with the parts operated thereby, a starting device including a sliding part, a pawl pivoted thereto and adapted to operatively engage a part of said connecting mechanism and a stationary part for engaging said pawl and disengaging it from the said connecting mechanism, during themovement of the slide to operate the latter, substantially as described.

21. In a pictul e-projecting apparatus, the combination with a lantern, of a longitudinally-movable picture-slide carriage arranged at one side thereof, a transferring mechanism adapted to move the slides into the lantern and return them to the carriage, mechanism for traversing the carriage, a motor for operating said transferringmechanism and carriage-traversing mechanism, mechanism for connecting the motor with the parts operated thereby, a starting device including a sliding part, a pawl pivoted thereto and adapted to operatively engage a part of said connecting mechanism and a stationary part for engaging said pawl and disengaging it from the said connecting mechanism, during the movement of the slide to operate the latter, a part for engaging said pawl and causing it to pass the part of the connecting mechanism opererated by it, on the return movement of said slide, and a spring for returning said slide, substantially as described.

22. In a picture-projecting apparatus, the combination with the lantern, of a longitudinally-movable carriage arranged at one side thereof, a transferring device for said slides and mechanism for traversing said carriage,

comprising a rotatable shaft provided with a 'level pinion, a part loosely mounted on said MALCOLM BENTZON.

itnesses:

JOHN E. BOUSFIELD, G. G. REDFERN.

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