US808673A

US808673A - Door-bolt and means for operating the same.

Info

Publication number: US808673A
Authority: US
Inventors: William B Morewood
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-10-31
Filing date: 1904-10-31
Publication date: 1906-01-02
Anticipated expiration: 1923-01-02

Description

PATENTED JAN. 2, 1906.

W. B. MOREWOOD.

DOOR BOLT AND MEANS FOR OPERATING THE SAME.

APPLICATION FILED OUT. 31,1904.

UNITED STATES PATENT OFFICE.

DOOR-BOLT AND MEANS FOR OPERATING THE SAME.

Specification of Letters Patent.

Patented Jan. 2, 1906.

Application filed OG b 31, I904. fierial No. 230,650.

To all whom, it may concern:

Be it known that I, WILLIAM B. MoREwooD, a citizen of the United States, and a resident of Elizabeth, Union county, New Jersey, (whose post-office address is No. 13 Park Row, New York city,) have invented certain new and useful Improvements in Door-Bolts and Means for Operating the Same, of which the following is a specification.

This invention relates to door-bolts, and more particularly to bolts designed for doors which serve as exits for auditoriums, theaters, and other places of assemblage.

The purpose of the invention is to provide a bolt of such construction and arrangement that in case of fire or other emergency a crowd of people pushing against the door to make their exit will involuntarily operate the bolt to unfasten the door.

In the drawings forming part of this specification, and in which like numerals of reference indlcate corresponding parts of the figures, Figure 1 is a sectional plan view of a door and lock embodying this invention and taken on the line 1 1 of Fig. 3. Fig. 2 is a sectional elevation on the line 2 2 of Fig. 1. Fig. 3 is a front elevation showing the inner side of the door and lock. Figwi is a section in detail on the line 4: 4 of Fig. 3.

1 and 2 are the door-jambs, between which is hinged the door 3.

4 and 5' are upper and lower sockets to receive the heads of the

bolts

18 and 19, the inner ends of which have pivotally connected thereto links 6 and 7, respectively. The inner ends of the links are in turn pivotally connected to a circular rotatable plate 8, forming a crank-plate, rigidly fixed on the end of the rotatable shaft 9 and located over the faceplate 17 which is countersunk into the door. When the plate 8 is rotated in one direction, the bolts are thrust outward to engage their sockets, and when the plate 8 is rotated in the opposite direction the bolts are retracted.

9 is a transverse rotatable rod fixed to the plate 8, preferably supported in bearings 10 and 11, secured to the door.

12 and 13 are two swinging arms fixed on the rod 9 and extending upward and outward therefrom. These arms support a thrustpiece which is so arranged as to beheld away from the door when the bolts are in looking position, as shown in the drawings. When the thrust-piece is pushed inward, the

arms

12 and 13 are swung inward and rod 9 is rotated so that the bolts are retracted and the door may be thrust open. In the preferred arrangement the thrustpiece constitutes a signplate which consists of a metal frame 16, having trunnions supported in

bearings

14 and 15 on the outer ends of the

arms

12 and 13. This metal frame may bear the word Push, so as to indicate the manner of unlocking the door. The trunnions on the frame are preferably arranged above the horizontal'axis of the frame, as shown. This insures the upright position of the frame, so that the sign which it bears may be easily read.

The weight of the

arms

12 and 13, together with the thrust-piece, is preferably such that when the door is swung to from the outside the bolts will automatically move to locking position, so as to fasten the door. This is the arrangement shown in the drawings.

It will be seen that by this invention exitdoors may be securely locked and yet in case of fire or other sudden emergency a crowd of people pushing against the door from within will thereby operate the bolt and press open the door. Thus the presence of attendants to open the door in case of emergency is not necessary, and the certainty of throwing open exit-doors without delay in case of emergency is secured.

What I claim, and desire to secure by Letters Patent, is

1. In a door-lock, the combination of ashaft parallel to and extending across the door; said shaft rotatably mounted in bearings which are fixed to the door; a push-plate to rotate the shaft extending across the door and carried by outwardly and upwardly extending arms fixed to said shaft; a circular plate rigidly fixed to the end of the shaft; one or more links pivotally connected to said circular plate outside the axis of the shaft; a bolt pivotally connected with each of said links; and guides on said door for said bolts.

2. In a door-lock, the combination of a shaft parallel to and extending across the door; said shaft rotatably mounted in bearings which are fixed to the door; a push-plate to rotate the shaft extending across the door and carried by outwardly and upwardly extending arms fixed to said shaft; a'circular plate rigidly fixed to the end of the shaft and having its rim extending within the face of the door to this specification in the presence of two subinto a countersurik lopening lrirovided thgrescribing Witnesses. A

or; one or more in {S pivota y connecte to said circular plate outside the axis of the shaft; MOREWOO r 5 a bolt pivotally connected With each of said Witnesses:

links; and guides on said door for said bolts. NICHOLAS M. GOODLETT, J r.,

In testimony whereof I have signed my name FRANK TRENHOLM.