US1446668A - Elevator lock - Google Patents

Description

Feb. 27, 1923 F. G. SHEPHERD ELEVATOR LOCK Filed Jan. 29, 1921 2 sheets-sheet l Feb. 27, 1923. 1,446,668

F.G.SHEPHERD ELEVATOR LOCK Filed Jan. 29, 1921 2 sheets-sheet 2 IUVE'IITEH Am] f ngy Application awn- 2 om it 1. 2113] cancer-2'1,

; snoivn that l, l: nANn w. orrnrnnirn, States, residing at count; of '0 alt invented 5 new and i Ele ator Lo ks of ecilication.

'- vention herein dohe A cd is to prov lock; is the cont f a 1d thu, ants t re one? .vuion or the car hile any shaft is not snut and locltodf has advantages over t pes' that it is located on the door where the ordinary lock is at the top thus preventing; unbalanced and possibly 'ollers by the operation of unlocked, the circuit roor o -Jones b one roll on time in opening and i ie type which is placed the tor, re door and requires two moveincnts to uni-och and open the door; the wirconnet ns to the oi cuit breaking switch t locl; are iuch sir I expensive '1" ran to a door; t lo i and lilrel I pler and less ph at the to oi; itself is much sun- 7 to 91c out or" order than U o L 36 M @ther advant new on the market will appear hereafter. the accompanying drawings 1 is a of the lock mechanism d unlocking mounted on a door and the Weight 1 J! l ii nl or Fig. 2.

' a to; v'eW of switch (:01 tacts lett elevation of dog 28 and perspective of the mechanism n the lock when a push button the floor at which it is desired r trates an alternative method 'i the lock release mechanism to return to normal osition.

filed January 29,

Plate is si'iounted on the door and carries stud G i The bell-crank lever 8 G and to arin thereof Jar I) which runs through guide liar f) l as on its sires projections 10, 1'1, LL, and 13 which ser 'e to restrict its travel and on its outer end ias handle used "for operating both door and lock. The end of ever 8 adjacent ho: l is curved on top so that it will act against and raise weight when the door is closed This end also carries on its lower side an insulating' to which is bloclr 15 secured t metal plate 16. On A 0t said bell crank lever 8 is l? which engages the frame or said box l thus locking the is however, sufficient clearlower side of lever 8 at notch and the lJOfI trance p rinit plate in contact with contacts :5 The weight of t 2 are carried enilil'cilllktfjtf and l, thus good vl eigg'ht element 2 is tree to more vertically, being o uided loosely h bolt ill and the sides of bot-t. s travel do. ward is restricted hv head 19 0'? bolt 18. Fig 2, which fits in recess 20 ot' the weight element. This recess opens at the rear ot the weight element is cast therein. The position to which it element inay tall is adjusted by in surini 3 varying the position ot nut 21.

To open the door, the operator pulls the and tl'iereo v moves the oar 9 loni v which inoverient'sh said bellcrank lever 8 on its pi ot and raises the aid lever and the weight 9,

s notch 17 from the box switch bv breaking the concts 3 and 4. The thus ooenin th switch is shown one cl? the inanv in elevators. li'ii e *ontroller 23. ire i252 disconnectnt brol i actuati l ell'ect oit' (3 which illust coiinections encounter the teed wire to the ll'l'iein for any reason. v;

cd from the controller 0' l elevato will not oper s r 7 current is cut oil". r hr r in this wire therefore inmle between L switch and controller the i carricd h a suspended cable I i l i as J as there are lloors Fig. 5, and all are wired in series. Therefore it any door he opened or unlocked the circuit through the controller will be broken and the elevator will l ail to operate until the door is closed and locked. Fig. 5 also shows the method of running conduit 26 which carries wire 22 between the switches. This conduit is run vertically from one switch to the neKt and the cable connection to the car is made from the junction midway up the elevator shaft. In the of loclrswhich are fastened to the top of the door and "frame it is necessary to install two condulets or bends at each floor, thus practically doubling: the cost of wiring, and in addition this conduit running; across the front of the shaft at each floor, together with the lock box. adds an element 07f danger because of the possibility of its becoming; loosened and caught by the moving car or hitting a passanger who stands too near the front. his element oit danger and the extra 'wiring'exp'ense are eliminated by the device herein described.

Fig. 7 shows'an adaptation of the device to a push button elevator. The object oi this adaptation is to prevent the opening of any door to the shaft except the one at which the car rests. I This is accomplished by the use oi. weight 27, n8, iever 29, shatt 30. roller 31, and hell cranli A detail of weight 27 and lever 29 as placed therein is shown in Fig. 8. 9 shows the elation of dog); Q8 and lever 29 as they are fastened to shaft 30 The operation of the device is hest illustrated by Fig. 10. its the car comes to any floor a projection 33 fastened to the car eou'ies in contact with roller 31 and forces it upward and back, thus rotating bell crank 32 and shaft in turn rotates 28 causing it to become disengaged from notch in lever B. and at the same time causes lever 29 to raise weight 27. Shaft 30 moves in slot as WGlQfllt 27 is raised. soon as 28 is disengaged from notch E l lever 8 may be operated from either the out-- side or insideof the shaft. but when the car is not in position so that projection 33 en roller 31 weight 27 acting on lever causes dog? 28 to return to engagement with notch 34, thus prevei iting the operation oi lever 8;

What I claim my invention is:

1,. An elevator lock comprising: a bellcrank lever pivoted on the door ol an elevator; a handle connected with one arm of said hell-crank lever to move said lever on its Divot. another arm of said lever having a notch in its underside and a weighted no tion opposite said notch; a current carrying ineinber fastened on and insulatec from said last mentioned arm of said lever; and contact ineiuhers spaced apart and mounted adjacent said lever and on which said cont-act i ber rests when said lever is in normal position. I

2. Lin elevator lock comprising a box; a bell-crank lever pivoted therein with one arm protruding from said box and having a notch cut in one edge thereof; a handle connected with the other arm of said bell-crank lever by which the lever isinoved on its pivot; spaced apart contact ineinbers mounted. in said box which is secured to the elevator door frame; a contact nieinher mount ed on and insulated from the notched arm of said lover a": l hjtZlD'ilGd to hrid the space oetween the contact members in said box; and a weight in said. box adapted to resist the movement of l lever in one direction and to aid said n'ioveaient in the opposite direction.-

3. in elevator loch comprising; a box having an opening; in one edge thereof; current carrying coi "acts in said hox forming a nortion of an electric switch; a weight noounted for imit l vertical movement in said boir; a" .nual 1 operated hell-crank lever pivoted on a iriovahle door d having one arm notched to said in w thin said openiiio' therein; a metal member on the same of said lever to complete the electric circuit when it is l l. in elevzitor loch comprising a hex secured on the frame of a door and having); a portion o't one side out out; spaced apartswitch contacts secured within said box: a plate astened on the door of an elevator adthe said box on the frame of the viii as Y'Vitnesses V l3. DUNBAR" Ann C. Tunrson. Y

orought in touch with both or said current carri -no contacts.

a bell-crank lever pivoted on said

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