US1398490A - Laundry-drier - Google Patents

Description

A. KENDRICK.

LAUNDRY DRIER.

APPLICATION FILED- MAY 19. 1920.

Patented Nov. 29, 1921.

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l ww? M. W A@ Umran- STATES.

PATE-NT orrics.

ARTHUR KENDRICK, OF NWTON, MASSACHUSETTS, ASSIGNOR .T INTERNATTONAL EQUZIIMENT COMPANY, 0FI BOSTON, IMIASSACBIUSETTS,4 A TRUST ASSOCIATION OF MASSACHUSETTS.

LAUNDRY-nains.

To all whom it may concern:

Be it known that I, ARTHUR KENDRICK, a citizen of the United States, and resident of Newton, in the county of Middlesex and State of Massachusetts, have invented certain new` and useful Improvements in Laundry-Driers, of which the followingis.

a specification.

This invention relates to laundry driers of the type in which the clothes to be dried are placed in a rotary reticulated or perforated drum inclosed in an air casing' through which a current of hot air is circulatedby suitable fans or blowers for the purpose of absorbing the moisture from the articles to be dried.

Machines of this type comprise an louter `casing for containing the rotary drum, the

heating pipes and the air circulating means and are partly subdivided by suitably arranged partitions into a drum compartment and-a blower compartment in which are located the fan blowers which direct the cur-V Y 'rents of air over the heating coils through a suitably located opening into the drum compartment so that hot air circulates through the rotary' drumI and may be returned through a suitable opening in the partition back to the blower compartment havi the screen to clear.,the same.

provision usually being made to catch the lintcarried by the air from the drum on a the drum compartment may be returned in whole or in part to the lower compartment' for re-use, or maybe partly-or entirely .di-A

verted therefrom. Another feature ofthe invention consists in providing a construction and arrangement of screen that makes it possible to clear the screen of lint practi- Specication of Lettersilatent. ApplicationV mea may 19,

' shaft c whic Patented Nov. 29; 1921.- 1920. serial No. 382,555. j

cally instantaneously after each run of arti- I cles to be dried v and Without the necessity of opening the casing or stopping the machine.- These and other features of the invention will be `particularly pointed out in the following specification and will be. dened in the claims hereto annexed.

In theY accompanying drawings I have Figure'l is an end elevation showing the location of the heating coils, the various air circulating partitions and the inclosing caslng.

F ig. 2 is a sectional elevation showing the linterior construction and arrangement of the air circulating passagesand-fan as well as the] adjustable shutter and dumping screen.

F ig. 3 is a detail view in front elevation showing the I neans for locking the shutter in its different positions of adjustment.

The inclosing casing a in which is mounted the drum shaft bcarrying the reticulated or perforated drum b is of suitable shape to properly inclose the rotary drum, the-l air circulating fans and the heating coils. At its front upper ortion it is provided with a door a2 for a ording access to the drum for the purpose -of putting in and taking out the articles to be dried. From a point below the bottom .of the drum b and quite close thereto is placed a curved baifle plate or artition' a3 which fol` v lows the curvature o the drum to a point near the top of the rearside of the drum as shownfin Fig. 1. To the frontedge of this baille plate-which extends the length of the casing Yis placed ari inclinedI partition a whose lower end is attached to a longitudinal forming a portion-of the front wall in this instance.fj,s placed a longitudinal ledge a" angle plate a.' On thefinside of a door a50 which forms an abutment for the front edge .of the screen c the rear edge of said screen 'abuttingagainst the angle bar a when the screen is in the normal operative position fas indicated in dotted lines -in Fig. l. l

"This screenis preferably curved and at' ortion is secured to a rock extends through the opposite end of the casing and is ,mounted-in suitable bearings formed by horizontal reinforcing its 'middle plates 02- which have two properly positioned perforated lugs c3 to receive the spring bolt c4 in the operating leverI c5 by which the screen is reversed for dumping purposes. The screen is shown provided at its normally front edge with a reinforcing f angle bar c? which in the reverse position and keep it in alinement. `Near the bottom ofrthe serves to close the gap between the angle bar c6 and they edge of the screen and vwhich also serves to stifen the frame work of the screen front wall ofthe casing a there is formed ,by means of the longitudinal plates as a3 forming partitions or false bottoms, an offtake passage leading to the oiftake flue tu which discharges into yan offtake pipe all at the back ofthe machine.

A screen d and an additional screen am serve to prevent the passage of lint into the offtakepipe. In the space between the baiile plate or partition a3 a5 a and the wall if-N015 in front of the heating chamber are `placedl one or more fan blowers e through whose discharge outlets -e the air escapes throul h vthe partition a15 into the heatin g ll' compartment containing the steam coils f,

` the intake of these fans being as usual-on the side of the fan casing.

Near the bottom ofthe casing just above the partitionl a? is mounted a longitudinal rock shaft g extending through the'opposite ends of the casing for a bearing support tol which is secured a platel orshutter g of sufcentlength to overlap the lower edge of the partition plate a5. The width ofthe ,shutter and the curvature of the screen c are so .correlated that when the screen .is in operatlve .position indicated in Fig. 1, the

shutter is capable of swinging from one edge of the screen'to the other against the adiat cent angle plates a6 c? while the edge of the shutter is close to thescreen so as to prevent any substantial passage of ,air between the under side of the screen land the upper edge of the shutter.

.To the outside of the end offtlie casing is secured the bracket ghaving an are shaped 'perforated member g4 having perforations so that the hot dry air passes to the upper part of the casin down around the upper edge of said ba e 'plate and through the 'perforated drum and returns through the' screen 0"t`o the longitudinal compartment below the screen the front lower portion of the casing. Y

If the shutter g be in the closed position Vindicated in Fig. 2, it is obvious that none of the air that has passed the drying drum will return to the fan blowers but will pass through the'screend beneath the false bottom a9 to the outlet flue a and the exhaust pipe all. If, however, the shutter Agbe adjusted to its extreme forward position all of the air that has circulated through the drum will be returned to the fan blowers land again circulated through the heating chamber back to the upper part of the drum. In Fig. 1 the shutter g is shown in one of its interior positions of adjustment in which la portion of the air returns to thel blower while the other portion passes along to the dischargepipe. On -one end of the casing covering the compartment v'containing the fan blowers there is provided a screened opening .It which may be wholly or partly ,closed by a sliding door It so as to admit or exclude to any desired extent fresh air from outside.

j After each drying runthe operator dumps the lint catching screen o by pulling out'the locking pin c* forming the handle of the lever c5 and swings it over until the locking pin is engaged with the forward perforated lug e3 by which movement the'screen willV assume the position as shown in Fig.v 2' with its upper siderunderneath and with -its front edge pressed. against the underside of the angle bar a". This is an operation which can be lperformed practically instantaneously and the jar or shock caused by' the edge of the screen striking against the'angle bar a6 causes the collected lint to drop to the bottom of the compartment, the shutter g having previously been shifted to closed position as s own in Fig. .2. 'Any loose particles of.

lint adhering to the vscreen when in reversed position will be instantly cleared olf .by `the current of air passing through. It will `be noticed that with this arrangement the screen may be cleared after each run of clothes without lossof time and without having toopen the casing -to get access to the" screen `or to remove it forcleaning pur.-

poses. At the end of the day or of the weekf the bottom of the trough 'or compartment.

lying below the screen and in .front of the shutter g may be cleaned 'when the machine is not in useby removing the lint therefrom as a.' The screensl al and am serve to ref vent the lint in this compartment fro escapingy into the room through the -outlet pipea11.' v On one end of the heating compartment is placed `a removable slide door a?. :The heatingpipes are arrangedin :separate series of verticaly coils f as indicated in Fig. 2 and the upper end'of eachsuch vertical coils is through anysuitable opening or door such i i connected to an inlet manifold f and atA their lower ends to an outlet manifold f2. In case of leakage of any steam coil the ldoor at may be slid open at the rear to expose the coils for examination and the particular coil at fault may be uncoupled from its two manifolds and withdrawn from the casing without disturbing the'other coils. This is a very useful and convenient feature of the present invention.

I believe that ,I am, the first t-o employ a dumping and self-clearinglint-catching screen that can be operated from the outside of the machine the advantages of which have been explained.

What I claim is:

l. In a drying tumbler the combination of a casing, interior partition plates partly subdividing said casing into a drum compartment and a blower compartment with openings for admitting the air from the blowers into the drum compartment and for admitting the air circulated through the drum back to the blower compartment, an adjustable shutter arranged to partly or wholly close the opening from the drum compartment into the blower compartment, a discharge conduit leading from said drum compartment to a `discharge port whereby the? diischarge of the air from the drum compartment into the blower compartment and the discharge passage may be controlled at will, substantia ly as described.

2. In adrying tumbler the combination of an outer casing, suitably arranged partition plates sub-dividing said casing 1nto a blo-wer compartment, and a drum compartment, a rotary drum mounted in the drum compartment said partition being constructed to provide an opening lto allow the passage of air from the drum compartment. to the blower compartment, a4 discharge flue having communication with the drum compartment to conduct air outsidev the'casing, and an adjustable shutter arranged to cut olf the passage of air into the drum compartment or linto the discharge compartment at will, substantially as described.

3. In a drying tumbler thecombination of an outer casing, p-artition plates arranged therein to subdivide the casing into a drum compartment and a blower compartment, air circulating means mounted in the blower compartment, a rotary drum mounted in the drum compartment, an offtake flue leading from the lower part of the drum compartment to the outside of the drum, an adjustable pivoted shutter pivotally mounted between the inlet opening ofthe blower compartment and the inlet opening of the offtake flue and adjustable to intermediate positions whereby the circulation of air through the blower compartment and through the otftake flue may be controlled at will, and 'means for securing the shutter in its various 4. In a drying drum the combination of f an outer casing and inner rotary drum air circulating means, air heating means, a partition partly subdividing the interior of the casing into a drum compartment and a blower compartment but leaving an opening for the passage of air from the drum compartment to the blower compartment, anofftake flue provided with an inlet opening in communication with the drum compartment, a. rock-shaft mounted in the lower part of the drum compartment, a shutter secured and vguided thereby to move into position to prevent the passage of air from the drum compartment into the blower compartment or theofftake flue according to its position of adjustment, a lever for actuating said rock-shaft and` means for adjustablyvlocking said lever in order to retain the shutter in different positions of adjustment, substantially as described.

5. In a drying drum the combination of a casing, a rotary drum mounted therein, air 'circulating means mounted therein, partition plates arranged to partly subdivide the casing into a drum compartment and a blower compartment with an opening left forthe passage of air from the drum compartment to the blower compartment, a discharge opening for the passage of air from the drum compartment to the outside of the casing, an adjustable shutter for controlling the proportion of air passing through to the blower compartment or to the outside of the casing, an inlet opening for admitting external air to the blower compartment, and means for controlling-the size of said inlet opening, substantially as described.

6. In a drying tumbler the combination of a casing, a rotary 'drum mounted therein, air circulating means 'mounted therein, partition plates arranged to partly subdivide the casing into a. drum compartment and a blower compartment with a communicating opening to allow the air from the drum compartment to enter the blower compartment, a screen arranged in the drum compartment to prevent the lint from passing into the blower'compartment said screen being movable into dumping position to discharge lint therefrom, substantially as described.

v7. In a drying tumbler the combinationl of a casing partly subdivided .into a drum compartment and al blower compartment witha communicatin opening to allow the passage of air from t e former to the latter, a discharge lopening for said drum compartment leading outside of the casing, ad-

. air into the blower compartment or the discharge passage respectively, and adjustable means for'` regulating the admission of external air into the casing to take the place of the air discharged therefrom, substantially as described.

8. In a drying tumbler the combination of` a casing partly subdividedv into a drum compartment and a blower compartment With'a communicating opening for the pas- Sage of air from the former. to the latter, a drum mounted inthe former compartment, and a fan mounted in the latter compartment and a pivoted screen for retainingthe lint from the air issuing from the drum, and means .for-shifting said screen V from normal operative-position to dump,

lng

A, su stantially as described..

position to discharge `the lint therefrom,

9. .In a drying drum the combination of a. containing casing having interior air defleeting plates, a rotary perforated drying drum mounted therein, a heating coll and airv circulating means for circulating the air over the heating coil through the dry-- ing drum, -a screen arranged to intercept the lint carried by the air escaping from the drying drum, said screen being reversible to permit clearing the screen of accumulated lint at will, substantially as described.

l0. In a drying tumbler the combination of an inclosing casing provided with internal deflecting plates and a perforated drying drum rotatably mounted in-said casing, air heating coils, means for maintainin the circulation ofv air over the heating coils and through the ldrum and back again to the heating coils and drum, .a shutter* adjustably mounted in the casing'to dei-lect a part or the whole of the air escaping from the `drying drum to the outside of the casing according to its position of adjustment,

and a pivotedzscreen mounted adjacent tol said shutter and movable atwill into position to dump the accumulated lint therefrom, substantially as described.

11. In a drying tumbler the combination of a casing partly subdivided into a drum compartmlent and a blower compartment with a communicating opening to allow the current of air issuing from the drum compartment to enter the blower compartment, a rotarydrum and a fan mounted respectively in said compartments, a curved lmt ycatching screen mounted in the lower portion of the drum compartment, an oftake liue for conducting the air from the drum to the outside ofthe casing, a .pvotally mounted shutter shiftable along the under side oi said curved screen and means positioning said shutterv in `various positions of adjustment to permit the air'from the drum to pass. either into the vblower compartment or the oii'take or partly into both in the desired proportions, substantially as described.

12. In al drying drum the combination 'of a casing inclosing a drum compartment and a blower' compartment,` a rotarydrum mounted in the former and afan inthe` latter compartment, openings being provided for the discharge of' the moist air from the drum to the outside of the casing or to the blower compartment,v a re- :ARTHUR KENDRICK.v

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