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Publication numberUS824173 A
Publication typeGrant
Publication dateJun 26, 1906
Filing dateDec 9, 1905
Priority dateDec 9, 1905
Publication numberUS 824173 A, US 824173A, US-A-824173, US824173 A, US824173A
InventorsHugh Elmer Clark
Original AssigneeHugh Elmer Clark
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Emergency exit-door lock.
US 824173 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

I No. 824,173.

, Y a I .PATENTED JUNE 26,- 1906.]



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,EMERGENQY Exit-noon Loo i 4 Specification of Letters Patent. I I Application-filed December 9,1905 Seria1 No. 291,1 62.

:Patented June 26, 1906.

To all whom, it may concern): Be it knownthat I, HUGH ELMER CLARK, a. citizen of the United States, and a resident of Rochester, in the county of Monroe and State ew York, have invented certainfn ew and useful Improvements in Emergency 'EXit- Door Locks, of which'the following is a specification. 1

emergency exit-door locks.

Th1s, 1nvent1on is an 1m .My invent on relates to lmprovements 1nrovement u on that setforth and describe :in Letters atent of: the United States No. 805,411 ,"issued to moon the21st day of November, 1905,

and is intended to adapt that invention to certain conditions not before considered.

In thedrawings, Figure 1 isa front elevation ofdouble doors embodying this invention. 2 is a verticals'ec tion on the line 2 2'ofFig. 1.. Fig. 3 is a persective view of certain details, and Fig. 4 shows in the relatlon of two ofthe parts another detail of con struction.

Dou'ble doors X and X are shown, which are hinged to the-casing in the usual manner,

' so'that they swing outwardly? Brackets 1 1 vers 6 6 are pivote are attached to said doors'yrespectively, to

whichthe hinged plates 22 are attached, respectively. plate 3 isals'o attachedto one of said doors, as X, which'carriesthe bracket 4 (see Fig. 2)and the-two airs otlugs' 5 5 and 5 5.. (See 3.)] eV crating-lebetween; the ugs 5 and 5 5,';respectivel The plate 4 has a horizon tal slot 7 and t e'levers 66 vertical slots 8 8, respectively. Rods 9 and 10 are onthe ends of the plates 2 '2, respectively. One of these rods 9 asses through all three of said slots of the fulcrums of sai 7, 8, an 8 and when closed its free end 11 enters a socket 12 on the end of the other rod 10. Locking-bolts 1 313 are pivoted to the levers 6 6, respectivel on the opposite side (l evers from, their slots 8 S'by yokes 14 14. The locking-bolts run through guides 15 1-5 on the door X and en- 4 gage socket-plates 16 16, which may be in the top and bottom of the door-casing or in any ot er suitable place.- A latch 17, that is'pivany suitable pointad jacent to the rod 9, '(in the drawings it is shown ivoted to the side of the plate 1,-)- car-'- rice as loulder 18 that is adaptedto engage a'lug 20 upon said rod 9. j

Normal the parts take the ositions shown in igs. 1 to 3, in which the r0 '9 lies in tively, and 100 the doorshut. When pres- 13 and unlocking the. door X, so that both tac ed to the outside of the door X) prevents other door X isvalso opened, and a horizon tally-slotted bracket 21' is shown for sup 'ortin at its outer end the plate 2 on the door by receiving-the rod 10. When the rod- 9- is forcedinwardly to retract the bolts 1313, its lug20 is engaged by theshoulder 1S leased from the latch, so thatthe bolts can not come into contact with the casing to mar it or to' prevent the doo from being closed.-

The socket 12 on 1th rod 10 is represented in Fig. 1 as open on itsbuter side; but in Fi 4 another form of socket 22 is shown, whic 1 is onlyopen to receive the rod 9 at its end 23. When the socket shown in Fig. 4 is used, both doors are closed'at the same time, so that the rod -9 will enter the socket 21. WhatIclaimis Y I 4 1. In an automatic door-lock, a door; a horizontallymovable part, hinged to. the door;' a guide-plate on said door, having a horizontal'slot for the-free end of said horizontally-movable art; an o crating-lever pivotally supported upon said cor, havin a movable part; a bolt on said door adapted to begoperated-by said lever; a socket in the door-casing adapted to be engaged by said bolt; and automatic means upon said door forlocking said horizontally-movable part when at the inner end of the" horizontal slot in said guide-plate, whereby said bolt is locked in its retracted position.

2. In an automatic door-lock, a door; a

horizontal slot for the free end of said horizontall -movab1e art; an=o erating-lever pivotal y supported upon-sai door, having a slot spanning the free end of said horizonthe socket 12 on the other rod 10 and the head sure is' exerted uponeitherof the plates 2 2, 'the'rod9 is forced through the length of the f. -slot'7 in the plate 4, tilting the'o erating-levers 6 6, and thereby retracting t 1e bolts 13 doors can swing open. A rabbet-strip or other suitable device upon one of thedoor's' (re resented by dotted linesin Fig. 1 as at-- the door X from being opened unless theslot spanning the free end of said horizontal yhorizontally movab le part hinged to the M door; a guide-plate onsaid door, having a on the latch 12, and the bolts are retained in their retracted positions until the rod 9 is retally-movable' part a bolt on said door adapt I ed to be operated by said leverta socket in the door-casing ada ted to be engaged by said bolt; anda late pivoted u on the door I and adapted to engage. said movable ori'zontally art when at the inner end=of the horizonta 'slotin said guide-plate.

; 3.;fIn aniaiitomatic door-look, a pair of swinging, meetin doorsfaplate hinged'to said rod when said doors are closed together; -a guide-plate upon that door that carries the i1 5 each door, each p ate being adapted to move horizontally to and from its door, and one of said plates having a projecting rod, and the other a socket adapted to contain the end of rod, havln 'a horizontal slot for said rod; an

operatingeverupon the same door, adapted oor,

to be engaged by said rod; a bolt on said adapted to be operated by said lever; and a sooket in the decreasing, adapted to be en= gaged by said bolt.

4.'In an'automatic door-lock, a pair of swinging, meetin doors; a plate hinged to each door, each p atebeing adapted to move horizontally to and'f'rom its door, andone of HUGH ELMER CLARK.


H. L. OSGOOL. -D. G mme.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5169185 *Mar 6, 1992Dec 8, 1992Republic Industries, Inc.Panic exit device featuring improved bar movement and fail safe dogging
US5340171 *Jan 22, 1992Aug 23, 1994Republic Industries, Inc.Door latch control apparatus with independent actuators
US6601881 *Oct 3, 2001Aug 5, 2003Julian MandellPush-action door release device and method of installing the same
Cooperative ClassificationE05B65/1006