US1700557A - Latch control for shaft doors - Google Patents

Description

flan. 29,1929. 1,700,557

H. CHERNIACK El' ALv LATCH CONTROL FOR SHAFT DOORS l Filed June 20, 1927.

' ATTORNEY Anarran sra-r -HYMAN GHERNIACK, or BROOKLYN, AND SAMUEL BRANDFON, orNiivvl YomnN. Y.; f AsAIn GHERNIACK AssIGNon To sAin BRANnro-N.

ing floors.

LATCH coNTRoL ron snArT poorts.

Application led Zl'une 2 0,

waiters,'may serve to be drawnto openingsV provided at each ioor in the nature commonly termed dumbwaiters7 suitable for the delivery of merchandise, the collection of garbage and refuse-at regularly appointed times or at signals given by the operator, positioned either in the basement or any other floor of the building, we have found that these devices haveproven `a source of considerable annoyance, danger and trouble by reason of voffering to the .tenant on each floor a means of 4disposing of refuse by'sim'ply dumpingthe same into the shaft. Such practice has led to an accumulationv of rubbish, garbage and other refuse material at the bottom of the shaft,leading to an unhealthful condition, Iand also forming a fire hazard, due to a possible improper collection of materialy at the bottom of the shaft. Furthermore, where it iscustomarily practiced to cause delivery-of I merchandise or receptacles through dumbwaiters, there has been experienced either filching or improper-removal of 'articles vas they are delivered in the ascending'or ldescending of the lift to various floors connected by a common shaft through the doors provided at each floor and leading to the common shaft. `Furthermore, in the event of fire, a common 'connecting shaft normally serves as a flue for the spread of fire, if vents are provided, `-as mayl be occasioned by the yopening of a door lleading to a common shaft. Thus, the openingfof a door in the case of fire may serve 'as a means to fan a controlled fire and cause spreading of the sameto connect- Ain, object', therefore, of our invention resides in the provision of a latch system for v vshaft doors', such as dumbwaiters or the like vwhereby individual control ofthe doors leading to the shaft may be had by a tenant at any predetermined floor only at definite periods of time when inthe control of an operator positioned at the pit or top of the shaft; the

i927.vv `serial No. 200,017.

invention contemplates the association of a door or a plurality thereof leading to au shaft c may only open the same for the receipt or MTH*mcsdeposit of material within theshaftopening only when" permitted todo so byan operator positioned at any predetermined' point, `as at A the pit or top of the shaft. Y A The invention still further has for, an object thereof the provision of Vdoors of dumbwaiter shaft in combination with a latching and release mechanism for the doorsleading to the dumb'waiter shafts controlledfrom ywithin the shaft,.permittingv the `opening vof said doorsonly at the willof an operator whereby in the `case of its use with dumbwaiters, as in'apartmenthouses, the operator at the bottomof the -pit may signalwhen the door leading to the dumbwaitershaft may be opened. by the tenant for the vdeposit into the dumbwaiter lift'of rubbish, receptacles or the removal from the shaftof articles to be delivered, such as merchandise, or for the return of empty receptacles or the like.

The invention still further has for an object thereofthe' provision of a' latch control for thedoors leading to dumbwaiter shafts,

the invention contemplating, the lprovision of a'latch or plurality thereof, in numbers corresponding to the floors connecting a' com- .mon dumbwaiter shaft including a latch operable by acable or rope, leading `toa predetermined pont inthe shaft whereby at a given signal from the operatoigthe tenant at'any" predetermined floor may open the door leading to the shaft in the normal way. Thus,

we provide a latch system for thedoors leading to the shafts of dumbwaiters, holding the same closed unless, at the will of the operator, the latch is releasedto permit the deposit or removal ofmaterial intol or from the lift'provided in the dumbwaiter shaft.

Our invention still 'further contemplates the provisionofa latch. system for doors of Adumbwaiters or the likewhich may be readily associated ywith duinbwaiters now used, whichmay b-e assembled with great facility and ease and one whichvis simple andineX'-l pensive to` manufacture.

ioo

To attain these objects and such further objects as may appear herein orbejhereinafter pointed'out, we make reference tothe accompanying drawing forming apart hereof, in Which'- n g Figurel is a side elevation showing a section Lof a dumbwaiter shaft, with out device serving to close a series of doors 'leading' to a dumbwaiter shaft;

Figure 2 is a view similartothat shown in Figure 1 with the latch systemv in the open position; Y

Figure 3 is an enlarged side elevation showing the detail construction of the latch mechanism;`

. i 'Figure 4 is la view similar yto `that shown in Figure 3 with thelatch in the open position . of Figure 3.

Figure 5 is a section taken on a line 5 5 of Figure 43;

`Figurex is anl end elevation taken on a line16-16of Figure v3;

Figure 7 is a sectiontaken on a line 7-7 Makingreferenceto the drawings, it will be observed-that fweliave illustrated our inyventiony as particularly adaptedfor use with a dumbwaiter shaft, suchiasnow customarily used in connection with apartmenthouses for the delivery or collection of articles, such as lthe delivery ofmerchandise or the collection ofgarbage Aorsimilarrefuse material. In the Yillustration shown, 10 isa dumbwaiter shaft viewedfifrom the interior of the shaft, the

section being taken along the length thereof acrossthe side walls 11 and 12, disclosingthe innervview of a plurality of doors 13, con- `nectedto the floorsfof the building, such as an apartment house or the like. These doors are lprovided with hinges 14, permitting 1nward `pivot-al mo-vement only and prevented :from movement into theshaftagainst vthe jamb orrbead 15. It is lpreferred to ,provide 4thehinges 14 with .suitable springs, insuring a self-closing action rof the door upon the hinges. lnteriorly ofthe Vapartment or fioor Vofthe tenant, we providea customary latching device 16 adapted to engage a hasp 17. Thus, the door 13'may-be opened inwardly by turningthe knob of the locking device 16 ztoV unlatch the door.

Interiorly of the shaft, we provide a latch system for t-he doorslea'ding thereto and this, so Ifar .as each door is concerned, takes ont-he `form of a latch ,18 mounted upon the frame of the door 19, adapted to engage the plate strike 20 mounted upon the door upon the vedge of the frame 21. In the construction shown, the latch 18 comprises a back'plate 22 having suitable Afastening orifices 23,

Vthrough which may be passe-d the screwzmembers 24. -Preferablyk centrally of said plate 22 there is formed a boss 25, drilledto receive the bolt 26 therethrough, and holding Athe-nut 27 thereofagainst turning' within .the opening 28 at the rear portion ofthe ,plate formedby the boss. The bolt 26 serves as a pivot for the bell crank shaped arm 29 and is held against removal therefrom byfthe nut 30. It will be observed that substanmovement, as ,provided bythe stopl.

tially free pivotal movement ofthe arm 29 is permitted upon the bolt 26 except for a counter clockwise movement which 1s prevented by the stop 31 'formedin the path thereof.` The-bell crank shaped arm 29 is preferably provided with a short operating arm 32, the'free end thereof 33 being formed to. engagealoosering*34, which is connected to said free end by the spaced lugs 35, formed on said loose ring and through which Ythere is passed a pin 36, serving to connectthefree end of the arm 33 and the'ring in pivotal relationship. Opposite to the shortfoperating arm, the bell crank arm .29 has Vformed a latch engaging arm, 37, suihciently long to extend past the door opening and engagethe plate striker20formed `with thevupstanding dog 38 suiiiciently longzto dispose engagement beyond theframe jamb. This-dog is provided at its extreme end with the-camming surface39, 'for-,purposes which `,will be apparent as this. description proceeds.l

pit ofthe shaft at '46 and servesito-hold the rope or cable substantiallytaut. -A ring 47, attached to the end. of the rope-44, has 'passed therethrough ,an operating` lever 48, vlpivoted at 49 at some iiXed platoon vthe wall adjacent the bottom or pit of theshaft. Y rl`hus,.it willbe observed that al downward pull ofthe operating lever48 will serveto reciprocate the cable or rope against the tension of the springs 43 and 45, To each -sidevofthe free, removable vring 34 .and attached `to .the rope thereis,providedring-stops 50 .and 51. Thus,

it will beobserved thatinfupward.reciproca-v` tion ofthe cable or rope .40, the ring stops 50 Y will serveto move the-ring34iupwardly, and kthis movement so rimparted serves to j.carry with thering. the freeend'of. the frame, 33 imparting a pivotalinovement tofvthefbell crank arm 29 vto the limitofitscounter clockwise .A downward reciprocal movement ofthe rope 40 will serve tocause engagementy ofthefring stops. 51 against thefree .ring 34carryingthis ring with it inthe continued downward movementloffthe -lever 48. This 'movement =will serve toimpartto the. bell. crankfarm: a. clockwisefmovement. Thus,.the cableorrope 40 ,may servetomovef the bell crankarm v2.9;tothe `position shown in .Figure 3, which is v`the closed position, or in Figure 4, which is the llO open figure, merely by reciprocation of the operating handle 40.

It will further be observed that in the posii tion shown in Figure 3 with the stop ring 50 disposed against the freely movable ring 34,

v the dog 50 may be forced against the resilient lll ' ual tenant from opening the door leading to the dumbwaiter shaft. Upon the receipt of suitable signalling from the operator at the bottomor pit of the shaft, the individual tenant will learn that ythe operator has re leased the latch by. a downward reciprocal movement of the operating handle 48. Such downward movement will position the latch or latchesif there are a plurality connected by the cable 40, as shown in Figure 2.

tening a door leading to a shaftbeyond the control of a tenant within the apartment except at the predetermined will of the operator who controls the lever 48. y

The doors, where a plurality of themfare operated, may be independently closed by the simple action of the spring` actuating means, thus the operator may proceed from one iioor to the other at a time when he has released ythe doors included in one group leading to kthe shaft to the next floor without waiting for a tenant to attend to the closing operation of the door. Optionally, however, the operator may reciprocate the cable to close thelatches as the lift is moved from one door to the other.

Having thus described our invention and illustrated its use, what we claim as new and desire to secure by Letters Patent, is-

l. A fastening system for shaft doors such as dumbwaiters or the like comprising individually operable swinging doors, fastening mechanism for said doors accessible only vfrom within said shaft including a` latch on the frames and a cooperating dog on said doors, a loose cable or ropev engaging inember on said latch anda cable orrope for said member operable from a distant point from said member, such as the bottom of said shaft whereby individual opening lof said doors,"

may be had by operation of said cable yand whereby said doors may be closed independently of each other. V-

2. A fastening system for shaft doors such as dumbwaiters or the like comprising individually operable swinging,self-closing doors, fastening mechanism for said doors accessible only from within said shaft a cam-faced dog on said doors, a latch on the frames, thereof and a resiliently urged and suspended, reciprocable cable or ropecontrol for said latch operable from a distancesuch as lthe pit 'or bottom of said shaft whereby individual f opening of said doors may be had by operation of said cable and the doors independently closed on `movement of the saine.

3. `A fastening system for shaft doors such as dumbwaiters or theflike comprising individually operable swinging doors, fasten- Thus, we have provided a system of'fas# ing mechanism for said doors accessible only from within said shaft including a latch on the frames and a Acooperating dog on saidv V shaft whereby said doors may be individually and independently closed and opened.

4. In a` fastening system forsliaft doors, such as duinbwaiters or the like, shaft fastening mechanism for the doors thereof ac-V cessible from within said shaft, comprising a dogy or strike plate and a cooperating latch, adapted to be mounted upon the door and frame respectively, said latch including a freely pivotal ring arranged to loosely encircle a rope or cable whereby independent movement may be `had along said. rope or cable. i i

In testimony whereof we have hereunto signed our names this 15th day of J une, 1927.

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