US1010482A - Door-bolt. - Google Patents

Description

MICHAEL V. ROWE, OF CHICAGO, ILLINOIS.

DOOR-BOLT.

Specification of Letters Patent.

Patente'd Dec. 5, 1911.

Application filed November 7, 1910. Serial No. 591,074.

To all whom tt may conccrn:

Be it known that I, MICHAEL V. CRown, a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Door-Bolts, of which the following is a specification.

My invention relates to improvements in door-bolts, and consists in the novel construction and arrangement of parts as will be hereinafter fully described and more particularly pointed out in the appended claim.

My invention will be more readily understood by reference to the accompanying drawings forming a part of this specification and in which,

Figure c1 is a front elevation of my improved door-bolt in its preferrd form, Fig. 2 is a transverse section of the door and door-casing showing the door partly open, Figs. 3 and 4 are detail elevations, and Fig. 5 is a detail sectional elevation.

The preferred construction for carrying my invention into eifect as illustrated in the accompanying drawings comprises a door 1 and a door-casing 2 therefor. Secured to the door-casing 2 is a face molding 3 to which is screwed a member 4, one end of the latter constituting a striker for the looking bolt to be described hereinafter. Hinged to the member is a substantially L-shaped perforated member 6, the perforations 7 of which are elongated as shown in Fig. 1. Screwed to the face of the door 1 is a casing 8 in which is mounted a slidable bolt 9 having an Operating handle 10 projecting therefrom. The handle 10 is adapted to rotate the bolt 9 through a partial revolution as is obvious from the side view.` One end 11vof the bolt 9 is T-shaped in form and adapted to register with and to fit into a perforation 7. The other end of the bolt 9 is flattened as at 12 for the reception of a swinging latch 13 which is adapted to engage said fiattened portion after the end 11 has been turned into locked position in the member 6 by means of the handle 10. Since gravity holds the latch 18 in engagement with the fiattened portion 12 of the bolt 9 the latter cannot turn, consequently the engagement of the end 11 with a perforation 7, as shown in Fig. 2 is secure.

In Operation when it is desired to lock the door 1 in closed position the bolt 9 is moved into engagement with the striker 5 in the ordinary manner, this function of the slidable bolt 9 being old and well known in the art. WVhen it is desired to lock the door slightly aj ar, as shown in Fig. 2, the member 6 is moved from the dotted line or normal position into the full line position and engaged with the bolt 9 as hereinbefore described. By making the member 6 L-shaped, room is provided for insertion of the striker 5 and said member may be turned back completely out of the way when not in use.

It is apparent that a person from the outside would not have access to the locking latch 13, hence the door can only be opened by a person on the inside.

A door-bolt of the construction set forth is simple of construction and efficient in operation.

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

The combination with a door and doorcasing therefor, of a slidable bolt mounted on said door and adapted to lock by rotation; means for rotating said bolt for locking the same; and a pivoted latching plate arranged to swing to engagement under the rear end of said bolt, the rear end of said bolt being flattened to engage said plate to prevent rotation of said bolt, substantially' as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

MICHAEL V. CROWE.

Witnesses HELEN F. LILLIs, J osHUA R. H. PoTTs.

Gopies of this patent may be obtained for five cents each, by addressng' the Gommissioner of Patents, Washington, D. 0.

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