US1168792A - Exit-door lock. - Google Patents

Description

H. W. DYER.

EXIT DOOR LOCK.

APPLICATION 111.51) MAY 12, 1911. RENEWED MAY 29,1914.

1,168,792. Patented Jan. 1 1916.

I 1/ Ljfi I 1 1-1 mmusn INVENTOR ATTORNEY r COLUMBIA PLANoamPH 60-, wAsmNu'roM n c I EXIT-DOOR LOCK.

icense) Specification of Letters Patent.

Patented Jan. 18, 1916.

Application filed May 12, 1911, Serial No. 626,809. Renewed May 29,1914. Seria1.No.'841,958.

To all whom it may concern:

Be it known that I, HARRY WV. DYER, a citizen of the United States, residing in East Orange, county of Essex and State of New Jersey, with post-office address at No. 30 Midlandavenue, have invented certain new and useful Improvements in Exit-Door Locks, of which the following is a specification. i p

This invention relates to exit door locks, by which term I refer to locks designed to be opened from the'inside of a dooronly and intended to operate quickly and certainly in case of panic when pressure is exerted against a part on the door by crowding against the inside.

The primary object of the invention is to provide a simple and inexpensive exit door lock which will be certain in operation and not liable to get out of order.

In the accompanying drawings I have illustrated my invention as embodied in an exit door lock for double doors and also in an exit door lock specially adapted to single doors, the principle of operation in both forms of exit door lock being precisely the same.

In the drawings: Figure 1 is a diagram showing the general arrangement of the parts of the exit door lock in front elevation. Fig. 2 is a vertical section on the line A A of Fig. 1. Fig. 3 is a horizontal section on the line B B of Fig. 1. Fig. 4 is a perspective view in detail of the operating mechanism, the pressure plate being indicated in dotted lines.

In the drawings, in which similar letters of reference designate corresponding parts in the several views, 11 represent doors swinging outwardly and 22 designate pressure plates mounted 011 the doors as best shown in Figs. 3 and 4. Each pressure plate is hinged to the door by means of a special form of hinge (3), which is provided with a spring (4) to force the hinge leaf (5) normally away from the doors. The hinges (3) are attached to the door adjacent to. their hinged edges and the ends of the pressure plates remote from the hinges (3) are secured by means of a bracket (6) to the pivot pin (7 of a toggle joint, the arms (8) of which are pivoted to the adjacent extremities of a pair of sliding locking bolts (9) and disposed vertically on one of the double doors. A spring (10) between the toggle joint and the door forces it and the pressure plate normally as far away from the door as the length of the toggle joint links (8) will permit. 1 These links are so arranged that pressure of the toggle jointtoward the door will cause the bolts to be drawn out of engagement with their sockets (11) and the action of the spring (10) in forcingthe toggle joint away from the door is effective in moving the bolts (9) into engagement with their sockets. From this description and an inspection of Figs. 1, 2, 3, and 4 the operation of the exit door lock illustrated in these figures will be obvious. The normal position of the parts is clearly shown in all of these figures and pressure against the plate (2) bearing the legend Push will compress the spring (10) and the spring (4), lengthen the toggle joint and disengage the locking bolts from their sockets, thus releasing the door and allowing it to swing outwardly under the pressure from within.

It is obvious that my improved door lock is formed of a minimum number of'parts of simple design and which will remain in working order without attention, which is highly essential to an article of this character. It will also be noted that the direct line of pressure of the bolt is horizontal whereby the crowding against the plate will be fully effective and its action cannot be prevented by an obstacle beneath the plate.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. The combination of a door adapted to swing outwardly, a pressure plate yieldably mounted on said door, a locking bolt for locking said door against outward movement, a link pivoted to said bolt and to said pressure plate, and a spring pivoted on the pivot pin on which the outer end of the link is pivoted, whereby force applied to said pressure plate will release said locking bolt and when said force is released said spring will force said locking bolt to its locking 7 to the plate and the ends of said bolts re- 3. In combination with a door adaptedto swing outwardly, a pressure plate mounted on said door for movement toward and from the'same in a horizontal plane, a pair of bolts mounted for vertical movement on said door and having their inner ends underlying said plate, a link pivoted on said plate and downwardly and outwardly inclined from its pivotal point, a pivotal connection between the end of .said link and said upper bolt, a similar connection upwardly and outwardly inclined on said plate through said lower bolt, whereby pressure on saidplate will straighten said links and draw said bo ts.

4. In combination with a door adapted to five cents each, by addressing Washington, D. C.

swing outwardly, a pair of bolts mounted r on said door for engagement with the door frame at the upper and lower edges of said door, said bolts having their inner ends adjacent and in overlapping relation, a pair of toggle links connected at their opposite ends to the ends of said bolts, and a pressure member mounted on said door andextending horizontally across the same and operatively engaging the joint of said-links to straighten said toggle on movement of the pressure member toward the door.

In testimony whereof, I have signed my name hereto in the presence of Witnesses.

HARRY w. DYER.

the Commissioner of Patents.

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