US352756A - Pneumatic dental plugger - Google Patents

Description

(NdMoaeLf 2 sheets-sheep 1.'

' EG. HUSTED.

' PNEUMATIG DENTAL PLUGGER.

No. 352,756. Patented Nov. 16,l 41886.*

a, t. W h s u. v h s 2 D. E T S U. H u E (No Model.)

PNBUMATIG DENTALA PLUGGER.

Patented Nov. 16, 1886.

HUBERT G. HUSTED,

PATENT OFFICE.

OF OBERLIN, OHIO.`

PNEUMATIC DENTAL Proces-:12.l

SPECIFIATION forming part of Letters Patent No. 352,756, dated November 16, 1886.

. Application sied .my 31,1886. serial No. 209,616. (No model.)

exact description of the invention, such as will y enable others skilled in the art to which it ap- 1o pertains to make and'use the same, reference being had tothe accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to that class of pneumatic pluggers used in the den-tal profession for packing or condensing gold or other ma-v terial in the cavity of a tooth.

Its object is to secure rapid blows onthe packing instrument or point, regulate the force of the blow, and when necessary arrest it instantly without stopping the engine. I secure rapidity of movement through thegaction of an air-pump supplying air to and withdrawing it from the tubular handle, control the force of the blow by regulating the admission and discharge of "air to and from said handle below the line of the hammer which moves therein, and arrest the blow by closing the air-vent, thus preventing the escape of the air from the tubular handle.

In the drawings, Figure 1 represents a perspective View of my improved pneumatic plugger. Fig. 2 represents a longitudinal sectional view of the .pluggen Fig. 3 represents a perspective view of an enlarged portion of thetubular'handle, showing the tube through which air is admitted and discharged on the side thereof. Fig. 4 representsan end view of the point-holder, showing a series of beveled notches in the annular flange thereof. Fig. 5 represents an enlarged longitudinal section of the nose-piece and connecting parts, showing, among other features, the means employedto retain the point-holder in place.

Fig. 6 represents a longitudinal sectional view of the nose-piece, through which a back action at an obtuse angle is communicated? to the packing-point. Fig. 7 represents a plan view 5o of the air-pump, showing the several connecting parts which actuate and support it. Fig.

8 represents a side view of the air-pump and crank-wheel with connecting parts and a portion of the driving-wheel of the engine. Fig.

9 represents a ycross-section of the lever by 55 which the hinged frame is raised or lowered, and the rack-bar which holds it in the required position.

`In the drawings like letters and figures indicate like parts.

A is the tubular hand-piece or handle, and 1 B the perforated cap screwed thereon, through which the air is supplied to and withdrawn g from the handle.

C is the sliding hammer,which, through the admission and exhaust of the air, has a backand-forth movement in the tubular handle.

D is the tube-through which air is admittedv and discharged through an opening in the tubular handle. This opening is provided with a valve, F, whoseY play is regulated or stopped by the annular piece E,whieh has a longitudinal movement in tube D. By means of slot vGr'in tube D and set-screw H, moving therein,

this annular piece E may be raised or lowered. The force of the blow of the hammer is regulated by the position of this piece E. 1 When raised toits highestpoint in the slot G, the valve F has full play, thus allowing the maximum quantity of air to be admitted and discharged below the base of the hammer, securing thereby the full weight of the blow. When the annular piece E is lowered so that it rests upon the valve-disk, it cuts off the'escape of the air, and this, being confined within the tubular handle, prevents the hammer from striking the socket-pin L. As' the force-of the blow is regulated by the play allowed to the valve F, it will be seen that, through the adjustment of the annular piece lil-and the quantity of air admitted or discharged through the valve F, any force of stroke desired may be secured. By means of the valve F and its regulation, as described, through the adjustment of the annularv piece E, the concussion of the hammer 95 on its return-stroke is avoided. The with- 1 drawal of the air from above the hammer by the action of the air-pump causes valve F to close, thus preventing the back-pressure of the Y air on the hammer, andthus avoiding the con- 10o cussion which would otherwise take place. M is an intermediate piece having a longitudinal central opening, through which the socket-pin L, which receives the blow, has free play. It is screwed to the tubular handle at b, and is recessed from below to accommodate the collar C on the socket-pin L, and the spiral spring l?, upon which the collar rests.

Q is the nose-piece, having longitudinal central opening for the free play of the socketpin L. It is screwed to the intermediate piece, M, at c.

T is the point-holder fitting into the socket formed in the lower end of pin L, and is held firmly therein by the bent end of spring U cntering the beveled notches in the annular flange of the point-holder T. This springis attached to the socket-pin L, and when in placein the notch not only holds the point in place, but also prevents it from turning in the socket. A series of these beveled notches are provided, as shown in Fig. 4, so that the point S may be used in different positions without turning the hand-piece-a desirable convenience, especially with a curved or bayonetshaped point. As the several points likely to be used are each provided with a holder, into which they are screwed or otherwise secured, it will be seen that the substitution of one point for another can be quickly effected. A slight pull on the point outwardly will release the holder by forcing back the spring U. The under side of the annular ange being beveled, a slightV pressure on the point inwardly returns the holder to its place.

N is aleather washer or packinginthe recess of the intermediate piece, M, above the collar O. The pressure of this collar upon the packing when the socket-pin L returns after each blow prevents the entrance of air into the handle when valve F is closed.

The air-pump 3 is shown in Figs. 7 and 8. It is connected with the tubular handle A by flexible pipe X, and has an oscillating movement on trunnions 12 on arm 18 of movable lor hinged frame 4. This frame is connected by means of a horizontal bolt or hinge to stationary frame G', supported by standard 14, to which it is secured by a clamping device.

16 is the vent-hole in the air-pump cylinder for the admission and expulsion of air.

5 is the piston-rod connected to crank-wheel 2 by wrist-pin 6.

`1 is the friction-wheel, preferably faced with leather or any suitable material, so as to increase its frictional tendency, and to deaden its contact with driving-wheel 17, from which it receives its motion.

The crank-wheel is actuated through shaft 7, uponwhich it is keyed, its rapidity of movement depending upon the relative size of the friction-wheel and driver and the speed with which, they are run. A

The lever 8 is attached at one end to the side of frame 4, the fulcrum-point of said lever being the projecting end of bolt 11. The

contact of the friction-wheel with the driver is secured by a downward pressure on the free end of the lever. This end is held where carried by means of a rack-bar, 19, with which it engages, on stationary frame G.' (Shown in Fig. 9.)

The auxiliary nose-piece for securing an upward blow on the packing-point is shown in Fig. 6. Tube cZ is screwed at its upper end upon the end of the nose-piece Q, and at its lower end upon'the angularcasing g, the lower arm of said casing being set at an obtuse angle with the line of tube cZ. Within this arm is pivoted lever Z. The blow of the hammer is colnmunicated to socket-pin L through socketpin L, rod e, and lever Z. Socket-pin L is kept in position and caused to press downward upon the end of lever Z by means of spring n. Thus after each blow the pressure of spring a causes the rod e, which rests upon the other end of the lever, to follow the return movement of socket-pin L.

The casing g, holding the lever Z, isplaced at an obtuse angle, as shown, to better facilitate operating on the back portion of the teeth, otherwise inaccessible. With the packingpoint working in the direction indicated, the operator has a freedom and scope of movement in the use of the instrument that cannot be obtained with a point working on a line parallel with the tubular handle.

I do not coniine myself to the specic form of valve which regulates the admission and discharge of air to and from the tubular handle, (shown in Figs. 2 'and 3,) as it is evident that other forms may be used without departing from the essential features of my invention, these being the use of suitable means for regulating the admission and discharge of air to and from a pneumatic plugger below the sliding hammer therein. f

l/Vhat I claim as new and of my invention 1. The combinatiomwith tubular handle A, of sliding hammer O and an adjustable valve for regulating the admission and discharge of air to and from said handle below the hammer therein, whereby the force of the blow may be regulated or arrested, substantially as set forth.

2. The combination, with tubular handle-A and means for supplying air to and withdrawing it from said handle, of sliding hammer C, valve F, tube D, and adjustable annular piece E, provided with set-screw H, said screw having a movementin slot G of tube D, substantially as set forth. y

3. The combination of tubular handle A, sliding hammer C,valve F, tube D, for the admission and discharge of air, and means within said tube for limiting or stopping the action of the valve, substantially as set forth and de-` scribed.

4. The combination,with tubular handle A, of sliding hammer C, adjustable valve F, intermediate piece, M, nosepiece Q, socket-pin L, spiral spring P, point-holder T, provided with a series of beveled notches on its flanged end, and spring U, substantially as set forth.

ICO

5. The combination, with a dental plugger,

and operated as yshown and described,whereby of air-pump 3, having piston-rod 5, friction the plugger-point may be operated in an upand crank wheels 1 2, keyed to shaft 7 driving-Whee117, hinged supporting-frame 4f, sta- 5 tionary frame G, lever 8, and -rack-bar 19, substantially as set forth and described.

6. In a dental plugger, an auxiliary nosepieoe consisting of tube d, rod e, supporting arm or casing g, lever Z, said lever set at an 1o obtuse angle from the line of the plugger, and

socket-pin L', provided with spring n, arranged Ward direction on aline divergent from the line of the plugger-handle, substantially as set forth.

In testimony whereof Iafx my signature in presence of two witnesses.

HUBERT G. HUSTED. `Witnesses:

E. C. BARNARD, D. S. HUsTED. y.

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