US1453915A - Elevator-door lock - Google Patents

Description

May .1, 1923. 1,453,915

C. W. CARR ET AL ELEVATOR DOOR LOCK Filed March 2. 1922 671171 723 Wflarr Egbert J. D 2121, NVENTORS fete? W Uorzouer A TTORNE Y.

Patented May 1, 1923.

UNITED 'STATES' a q 1,453,915 PAWEENT oFFie-E.

CHARLES w. CARR, ROBERT J. DIXON, Ann rn'riiia ooitoirnn',*or oenmv m;

ELEvA'roR-nooR LooK.

Application filed March 2, 1922. 'Serial No. 540,425.

Toullwhom itmay concern; v

Be it known that we,.- Cnne s W. C OB RT DI N, aDdP R. W- QO Q R citizens of the United States, residing at O'g-i den, in the county of Weberand State of Utah, have invented certain newfand useful Improvements inElevator-Door Locks,

of which the following is a" specification This invention has reference. to elevator doorlo'cks of extremelysimple constrirotion and not liable to get out of order andwhich be safe and reliable in operation as may We 1 as requiring the completionof anelec;

tric circuit before the elevator can be started.

closed until theparts' are operated to effect the unlocking .of' the device. i 7

- One of the lock members is provided with circuit terminals and may be made fast to a fixed part of the doorcarrying the lock, while the other latch member maybe made fastto acatch member, which on the closing of the door completes the circuit and renders it possible to startthe elevator in operation,

which starting of the elevator cannot be accomplished until the circuit is completed.

One of the companion lock casings is provided with a gravity catch and the other lock casing is provided with a keeper which under certain circumstances may be engaged by the catch and so hold the two lock members against escape until desired.

The catch is responsive to hand move ment and is adapted to operate a contact member completing an electric circuit within the casing containlng the contact member v 1 which in turn is responsive vto the. impact of the contact member so as to cause the locking of the contact member in-the closing.

' position thus establishing an electric circuit.-

-The invention will be best understood from a consideration of the following jde tailed description taken in connection with the accompanying drawings forming part of this specification with the understanding however that the invention is not confined to any strict conformity to the showing of the drawings, butmay be changed and modified so long as suchjchanges and modifications mark no material departure from the salient features of theinvention as expressed in the appended claims. 7

nOt Iliecessarilythe same size and co' witha slot orcutoiit 5 and 6, respe,

. dating el tri wi e r; cohdiiptbrsfil Figure 1' is ei aaeii, part y fi st showing the elevator lock in the closed posi F .2 a e ev te i th the latter dise'ngagedlor the open positi n these casings may of similar, ,al

position. ,l:he flange l ,o fit he loclrnieiiibr A. is provided ,witha passage for V which .may be assumed as coming from .7 suitable source .of; electric an as they depot differ frofri other eleetrie cur rents, need notbe particularly described.

Mounted within the casingA and his of the flange 1, are clips lo suitably apart and adapted to carry a block 11, which may be formed of insulatgm eriak 1,... 1;

i onsidering the block 11 a s formedofin-f sulating" material ,;it ,hasi-made fast tel it a through pin12 held to the block by nutsgls, so asto' firmly'clamp thebloolr and posltion. i 5

The nuts 13 are designed to secure at minal 1 1 to a pin 12 and this terminal in turn made fast tothe conductor 8, one terminates close to the-slot or passage eo in a pair of fingers or flanges l5 carrying .be,1

tween them a corresponding insulatingblock 16 also carried by ,aclip 17 so-that thedolock may be held firmly and yet removably --in the casing A. i i w ,1

Traversing the block '16 is aconducting. pin 18 held to the block by clamp nuts;19 similar to the nuts 13. I c I ,v

The clampnuts 19 hold acontactterminal, 20 to they pin 18 and this contactterminal 2O,v is made fast to the electriqconductofl), both of the conductors 8 and" 9 reaching ,the ex terior of the casing through the passage 7 in h flange w M o.

Located in the lo'ckjcasing- A- is arockarm 2 Which fe t e ak o l g t s m ybe. made of vulcanized fiber or some other such R e n to h rawi a 7 two lock casings A and respe ctively an member and so shaped as to be heavier at one end than at the other so as to overbalance about a pivot pin 28 with a catch 7 end or hook 29 normally extending through the passage 6 and capable of being projected through the passage 5 of the easin A.

WVhen the lock is mounted upon an elevator door, the operation thereof may be described as follows.

When the elevator lock, constructed in accordance with the. invention, is installed on the elevator door and easing, the memher A constitutes the stationary casing and is carried by the stationary member, while the elevator door, which is usually a sliding member is carried by the elevator cage.

The lock casing A carries the electric conductors 8 and 9 which therefore need no adjustment. The conductor 8 is electrically connected to the insulated pin 1 L, while the electric conductor 9 is electrically connected to the insulated pin 18.

So long as the lock casings A and B are not in engagement, the overbalanced contact arm 22 rocks on an arm 80, on which it is supported, and drops to a supporting pin 31 in the casing A thus carrying the contact fingers 25 and 26 out of engagement with the pins 14; and 18. This occurs when the catch 27 has moved from engagement with a keeper 82 within the casing A.

When the catch 29 is manipulated by the hand of the operator, it may be lifted out of the path of the keeper and the elevator door may be pulled away from the casing A thus releasing the arm 22 and permitting the arm 27 to be Withdrawn from the keeper 32.

When the catch 29 has entered the casing A, its natural tendency is to gravitate behind the catch 32 and the arm 22, being an overbalanced arm, will drop down upon the shorter arm of the arms 22 thus causing the longer end of the arm to lift with the result that the fingers 25 and 26 are moved into engagement with the projecting ends ofthe pins 14 and 18 causing the fingers carried by the arm 22 to make contact with these pins and thus establish the circuit controlled thereby. When the arm 22 is rocked to an approximately horizontal position,

which it does when engaged by the catch 29 with the door of the elevator moved from within the casing A, the circuit through the conductors 8 and 9 is broken and the lock is no longer affected by the catch 29.

The catch 29 is only affected when the catch has entered the casing A and depressed the shorter end of the arm 22, so as to bring the contacts 25 and 26 into electric engagement with the conductors 8 and 9, in which condition they will remain so long as the catch is held in engagement with the arm 22.

When the two members of the elevator lock are caused to approach so that the catch 29 will enter through the openings 5 and 6, the catch 29 being in the meantime manually elevated or even caused to ride onto the top of the arm 22, the electric circuit is completed.

The elevator cannot be started when the door is not shut because the controlling circuit through the conductors 8 and 9 is open or broken and the elevator cannot be again started until the circuit is closed.

*What is claimed is 1. An elevator door lock comprising two coacting casings, with one casing on the door and the other casing carried by and movable with the elevator, a pivoted, overbalanced catch carried by the first named casing and movable into the second named casing, and a rockable contact arm carried by the second named casing and having spaced contact terminals in the path of the opposite ends of the rockable'contact arm, and bridged by said contact arm when rocked by engagement therewith of the overbalanced catch.

2. An elevator door lock comprising two coacting casings, with one casing on the door and the other casing carried by and movable with the elevator, a pivoted, overbalanced catch carried by the first named casing and movable into the second named casing, and a rockable contact arm carried by the second named casing and having spaced contact terminals in the path of the opposite ends of the rockable contact arm, and bridged by said contact arm when rocked by engagement therewith of the overbalanced catch, each of the spaced contacts being fixedly mounted in the casing appertaining thereto and the rockable contact arm having joined contact fingers at opposite ends movable into engagement with the spaced contacts to bridge them.

3. An elevator door lock comprising two coacting casings, one on the car doorand the other carried on and movable with the elevator, a pivoted overbalanced catch carried by the first named casing and movable into the second named casing, a rockable contact arm carried by the first named casing, spaced contact terminals in the path of arm and bridged by said contact arm when rocked by engagement with the Overbalanced catch, contact fingers carried by the rockable arm and electrically connected through said arm to serve as bridging means for an electric circuit when brought into contact with the first named contact, and

an external electric circuit for completion by the electric contacts carried by the rock- 10 v able arm.

' In testimony whereof, we-aflix our signatures hereto.

i CHARLES W. CARR.

ROBERT J. DIXON. PETER 'W. CONOVER.

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