US1586505A - Interlocking door for waste chutes - Google Patents

Description

May 25 1926.

1,586,505 G. D. BEAVER INTERLOCKING DOOR FOR WASTE CHUTES Filed July 22, 1924. a Sheets-Sheet 1 1; 44 5== I E M 51%.

May 25 1926.

G. D. BEAVER II INTERLOCKING DOOR FOR WASTE CHUTES Filed July 22, 1924 2 Sheets-Sheet 2 GAIL D. BEAVER, orErnILAnEnr Il ;,snnnsynvanm; assre von rrofnAsLn r'r (more AND" CONVEYOR; COMPANY, on'onxs PEKNSYLVANIA,1A conronnmon or; 31mm 1 .SYLVA'NIA;

m 'rnnnoonrno noon ronWAsTn'on-u'rnsff xpplicatiqnfiledfiluly 22; 1924. s r al no. 727,415.

. My invention relates :to theiprotective closure of passage ways by double doors andto means for opening and. closing the double doors; It findsits best illustration in protection of branches of waste chutes from building and inlet branches areprovided at the difierenti floors to receive'svveepings and Waste ment. I

To avoid? risk. of-Qfirespreading from floor tofloor. through;v the: chute "it is desirabl'e to: have.- the; chute everywhere: at. all

times sealed-z from-the interior-of the build:

i'ng, andtheamain puifpose of my. inventionzis to provide improved, inexpensive and .efii" cient means for" absolutely: sealing, the chute at all ti1nes fron1 the; iht'e'rioivof the build- 1n'g.j. V Airlurther purpose is to provide improved interlocking operating imeclianism: for doors so relatedfto" th'emxthatgit will operate. either door-r separately andwhen the one door is being. operated will lock the other doorshut.

* The operating; mechanism may. he looked "at its intermediate position so as to lock bothr doors or'may be arranged to lock both doors by its position alone;

. A 'further purpose: is to'have the dOOrSD pivoted. and: simultaneously positioned. by

means of pivoted. operatingmechanism that simultaneously mates with and: positions or separately. and successively. operates other;

rotary mechanism. connected with: the individual doors.

media-l2 position and: may look them-shut,

of this mechanism: (Figure 7 'By movement oflthe operatingqmechanism' in; on direction l lock. (e1; continue to maiir matter for delivery to the base left freetomove in "this; way, as preferred. a

I thus hold. both doors shut where theoperatingj niechanism'isin the either bylocki'ng the operating mechanism (Figure 3:): on by the position: of the-parts Chutes already existz with il iterlocliing f sureselosure of one doe. when theotheriq I I double--.'doors in which the interlookingem Y aste chutes usually extend-vertically the basement. to the: top of" a full-yopen yet does not ensure closure at other times,v permitting.both doors to be.

partially open atfthe same time; 'lhiszcon- 'dition defeats;- ina 'measure,the purpose for-.Wliichfthe doors are installedflVvith' my interlocking: doors, common means ISHPBO- videdr for opera-tinglboth,doors; one at time and nBlhhGB dQODGan move at alllunle'ss the; other-i door is entirely I closed. 1 Neither dooiiican operate the other. Looking means may he I {provided for" the: individual doors to prevent themfromgmoving in response to pressureupon'ethe doorsyor theyflmay be I either door. but not both) I type. with variations-in the lockingg means Ihaire preferred to illustratebut onelmain proved to berpractioa-l, effective, inexpensive and thoroughly" reliable and .WhichQat the same flti-meivell illustrates the principles 0% my. inventionli Figure 1* shows a broken'-side elevation i1.- lustrating my invention. i

, li ijgmre2l is aaplanxof Figure 1.;

; Figure 3 isa front-elevation of Figure 1.

Figure .4; is an enlarged detail illustrating .theaoperating; gears when ibotlr doors are closed. M,

Figure 5 is a view similar to Figure 4L hutwith totheouterdoorheing openivide; p

' Figure GgisR-a similar View 'showingi'the gears. in position. corresponding to that in which: the outer oor iscl'o'sedand. the inner the gearsinp'osition corresponding 1 door is open Wide.

' Fi ure-71" operating gears n which" the operating gear locks both driven gears 1n closed positrons'of v the doors :closed by them.

p provided for theoperating mechanisms and inthe chutes, {selecting a form WhlCh has...

1s an Jenla'rgedI detail showing Figures 8 and 9 are fragmentary sections of the chute showing forms slightly variant from that of Figures 1-3.

In the drawings like numbers refer to like parts.

Describing the invention in illustration and not in limitation and referring to the drawings The main chute 15 runs from the basement to the roof, a small section thereof, that at a single floor, being shown in the figures. A requisite condition for fire protection is that there shall never be direct connection between the chute and the interior of the building. i

Each lateral chute or inlet 16, giving access to the chute at a floor, is supplied with double doors 17 and 18. One only of these should be capable of opening movement while the other is kept tightly closed. Assuming that the outer door 18 is open, sweep-- ings and waste matter, laundry or other material for delivery to the basement is passed through the opening but cannot pass from the lateral chute into the main chute because the inner door 17 is closed tight, preventing direct opening between the main chute and the room into which the door 18 opens. 7

So far as I am aware I am the first to provide efficient common means for positioning, operating and controlling both doors in a way to wholly avoid this danger of direct opening between the chute and room.

The outer door 18 is connected with a hinge, shaft or pintle 19 (see Figures 7, 8

and 9) which rigidly carries the gear 20 and the inner door 17 is connected with a similar hinge, shaft or pintle 21 rigidly carrying the gear 22 so that the positions of the doors are controlled, respectively, by these gears.

The intermediate gear 23 is mounted upon a shaft or pin '24 upon which it may turn or which may turn it as preferred. The hand lever 25 may evidently be connected with the shaft, where the shaft drives the gear or directly with the gear. The gear is so constructed and connected as to operate both doors, one at a time. The hand lever 25 is provided with catch 26 at the position which corresponds to the outer door open and inner door closed, the purpose of this catch being to hold the outer door open when matter is being dumped into the chute.

The driving or intermediate gear 23 has teeth 27 cut on a portion only of its outer circumference, the remaining portion 28 of the circumference being circular and having a. radius corresponding approximately to that of the pitch circle of the teeth.

The gear 20, which positions the outer door. has full sized teeth 29 fora portion of the circumference and has two or more teeth 30 and 30,'at one end of the toothed portion used, cut away to give a concave surface or separated contact edges with a hollow between to fit the convex circular are portion 28 of the gear 23. As the surface at 3 shown as a recess between the two teeth is not used, the concavity not needing to be as deep as this, it is immaterial whether it be left out a recess, as would be the case in the normal cutting of the gear, or be filled in to the pitch line. Likewise it is immaterial as to the contour of the surface 31, which is shown a circle. It could be filled with teeth or flattened or have other different contours as it is not used.

In the same way the upper gear 22 operating the inner door 17 has teeth 32 full size around a portion of its circumference and two or more teeth 33, 33 cut to cooperate with the convex are 28 of the intermediate wheel.

For the same reasons explained in connection with gear 20, it is immaterial from a mechanical standpoint whether the surface recessed at 34 be av recess inside its pit-ch circle or not and the surface at 34 may be of any contour.

The important thing is to give the driven gears and driving gear contours adjacent to their full toothed surfaces such that the driving gear shall act as a stop for the driven gears, permissible for both in the neutral po sition of the driving gear (Fignre7), but in any event for each one of them just'the moment the other has moved to begin opening of its door. Thisinterfitting stop connection is illustrated. by one form of the so-called Geneva stop mechanism or motion.

It will be evident that the sizes and proportions of the gears as well as the extents of openings of the doors will determine whether or not any of the teeth upon gear 23 which engage the teeth of gear 20 (beginning with the left end of the line of teeth in Figure 5) will also come into mesh with the teeth of gear 22 (with which the teeth of gear 23 begin to mesh from the right end of the line of teeth) or whether the two sets of engaging teeth upon gear 23 will overlap, as would be the case with a smaller diameter of gear 23 or with a larger throw of the doors. In the illustration shown they do not overlap and one of the teeth shown may not engage with the teeth of either of the gears 20 or 22, depending upon the extent of opening given to the inner door. For this reason the arc of teeth upon gear 23 may be interpreted to form two arcs. Where there is a gap between the teeth from the to ends engaging the two gears they may even form two arcs or sets of teeth and the teeth shown on gear 23, evenwhen uninterrupted may be viewed as forming two sets.

For much the same reason, the range of.

may be wrapped about the pintle and one end of which will press against the door to tend to hold it closed.

In Figure 9 the door 17 is tangent to the inside of the pintle upon which it is carried instead of being tangent to the outside of this pintle as in Figure l with the result that the door tends to close beyond the position shown in Figure 9 causing reliable closure against a surrounding flange 39.

. I recognize that this operating mechanism is suited to uses for protecting other passages than chute passages and have therefore used the chute form as an illustration upon which claims of broader scope are founded.

A great advantage of my invention is its practically fool-proof character in that 'the doors cannot both be opened at one time even in the case of carelessness by the users. The interior of the main chute cannot at any time come into direct communication with the room..

It will be obvious that those skilled in the art will see modificationsv and changes which may be made in my invention without departing from the spirit and scope and it is my purpose to claim all such herein as come within the reasonable spirit and scope of my invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is z- T 1. A chute, a pair of swinging spaced doors for the chute each having. a tendency to close, driven gears respectively connected to turn when the doors turn, an intermediate driving gear between the driven gears adapted to drive the driven gears to open either door and, when free, to be driven by the closing tendency-of either door to permit closing of the dOOr automatically and stop devices between the driven gears and the driving gear preventing opening of either door when the other is not closed.

2. A chute, a pair of swinging spaced doors for the chute respectively pressed toward closed-position and each having closing movement in a direction opposite to that of the other, driven gears respectively turning when the doors turn, an intermediate driving gear between the driven gears adapted to drive the driven gears to open either door according to its direction of turning and. when free, to be driven by the closing tendency of either door to permit closing of the door auton'iatically, means for turning the driving gear and stop devices between the driven gears and the driving gear preventing opening of either door when the other is not closed.

3. A chute, a pair of pivoted doors therein, a gear upon each door pivot turning with the door, an intermediate gear between the two gears and stop interlocking between the intermediate gear and first gears whereby the position of the intermediate gear corresponding to open or partly open position of either door stops the gear upon thepivot of the other door from turning.

4. A chute, a pair of pivoted doors therein, a gear upon each door pivot turning wi h the door, intern'iediate gearing mechanism be tween the two gears and stop interlocking between the intermediate gearing mechanism and first gears whereby the position of the intermediate gearing mechanism corresponding to open or partly open position of either door stops the gear upon the pivot of the other door.

5. A chute, oppositely swinging doors therefor, and driving and driven gearing controlling the position of said doors each having gear teeth and cooperating stop motion surfaces, characterized by engagement of the SLOP surfaces of the driving gearing and the driven gearing for either door to hold that door closed and at the sametime by engagement of the teeth of the driving gearing and of the driven gearing for the other door to open said other door.

6. In a chute, a pair of doors swinging in opposite directions to close the chute, two gears connected one with each door to swing with the doors, and each having teeth and an adjoining stop motion element and in termediate mechanism having teeth for engagement by the teeth of either gear and adjoining the teeth adapted to cooperate with the-stop motion elements of the two gears, one at a time, whereby opening of either door turns the intermediate mechanism and applies the stop motion to the gears connected with the other door.

7. The combination of a chute, pivoted doors threin having parallel shafts, and means comprising gearing on the two shafts and gearing cooperating therewith for opening either door whileholding the other door closed. r

8. A pair of doors and driving mechanism for opening either door while holding the other closed, comprising a driving gear having teeth throughout an arc of its circumference and, at each end of the arc, a convex smooth surface, in combination with driven gears on opposite sides of the driving gear, connected with the doors, having teeth which cooperate with teeth upon the driving gear and spaced contact surfaces adjacent the teeth cooperating with the convex surfaces respectively of the driving gear to free the driven gears from driving engagement with the driving gear and lock them against movement.

9. The combination of a. chute, a branch chute thereto, inner and outer pivoted doors in the branch, a gear for successively positioning the doors by its angular position and having both operating and locking parts and connections between the gear and doors int) 20. A passage way, spaced pivoted doors therein and a combined driving and stop mechanism for opening either door while holding the other closed and comprising. a driving gear having two setsof teeth and adjacent each set for a portion of its circumference, a convex locking surface, and

a pair of driven gears respectively connected operatively to the doors and each having teeth meshing respectively with the two sets upon the driving gear and aconcaved locking surface adjacent the teeth adapted to" engage respectively with convexed locking surfaces of the driving gear and arranged so that the toothed engagement between the locking both drivengears.

i oAiL D. BEAVER.

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