US2903286A

US2903286A - Door lock

Info

Publication number: US2903286A
Application number: US639486A
Authority: US
Inventors: Richard Joseph; Richard Lillie
Original assignee: Individual
Current assignee: Individual
Priority date: 1957-02-11
Filing date: 1957-02-11
Publication date: 1959-09-08
Anticipated expiration: 1976-09-08

Description

Sept. 8, 1959 J. RICHARD ETAL 2,903,285

DOOR LOCK Filed Feb. 11, 1957 WQQ/ k '//,1||n l4 i 20 40 I2 ///////////HII1V// INVENTOR.

United States Patent DOOR LOCK Joseph Richard and Lillie Richard, Lowell, Mass.

Application February 11, 1957, Serial No. 639,486

1 Claim. (Cl. 292-295) This invention relates to door locks and more particularly to a device that is adapted to lock substantially hinged type door. 1

It is an object of the present invention to provide a locking element that may be inserted between a door and door frame to releasably secure the door against movement toward an open position.

It is another object of the present invention to provide a door lock of the above type wherein a single locking member is inserted between the door and door frame and engaged within the latch plate at one end and provided with a removable locking element at the opposite end, which latch plate and locking element retain the door in a closed position.

Other objects of the invention are to provide a door lock bearing the above objects in mind which is of simple construction, has a minimum number of parts, is inexpensive to manufacture and efiicient in operation.

For other objects and for a better understanding of the invention, reference may be had to the following detailed description taken in conjunction with the accompanying drawing, in which: I

Figure 1 is a transverse cross sectional view of a door lock made in accordance with the present invention, in operative use with a door and door frame;

Figure 2 is a vertical cross sectional view taken along line 2-2 of Figure 1;

Figure 3 is a perspective view of the door lock element; and

Figure 4 is a perspective view of a cooperating locking member.

Referring now to Figure 1 of the drawing, a device made in accordance with the present invention is shown in operative association with a door that is mounted for rotation with respect to a door frame 12. Movement of the door in one direction is limited by a molding strip stop 13, whereas the door is normally retained in the closed position by means of a reciprocating latch element 14 that is operated by the handles 15 in a conventional manner. Normally, this latch element 14 extends into securing engagement within an opening 17 in a latch plate 18 that is secured to the frame 12. Said latch plate embodying a striking tongue portion 38 extending outwardly from one edge thereof intermediate its ends. Said tongue portion 38 having an opening 40 extending therethrough, clearly shown by Fig. 1.

As is more clearly shown in Figures 2 and 3, the locking element 20 made in accordance with the present invention is shown in the form of a substantially flat plate having a blunt, screwdriver 21 at one end and having a laterally extending L-shaped lug 23 adjacent thereto. In operation, the element 20 is placed in the position shown in Figure 2, with the lug 23 disposed within the 2,903,286 Patented Sept. 8, 1959 opening 17 of the latch plate, whereupon the door 10 is rotated to the closed position, thereby laterallylocking the element 20 in place. A washer 25 having a centrally elongated slot 26 is slidably supported upon the opposite end of the element 20 and moved towards engagement with the door and frame. A plurality of longitudinally and transversely spaced openings 28 are provided in the central portion of the element 20, any one of which is adapted to removably receive the locking pin 30. Thus, the washer 25 is moved along the element 20 and over the tongue portion 38 of latch plate 18 to its innermost position, whereupon the pin 30 is inseited into the opening 28 closest to the washer and through opening 40 in the tongue portion 38. For convenience, the pin 30 may be attached to the Washer 25, such as by a chain 31. The outer end of the element 20 is formed in the shape of a bottle opener 33 to increase its utility. To unlock the device, the pin 30' is removed from the element and the washer 25 also removed, whereupon the door may be opened and locking element removed.

While various changes may be made in the detail construction, it shall be understood that such changes shall be Within the spirit and scope of the present invention as defined by the appended claim.

What we claim as new and desire to protect by Letters Patent of the United States is:

A door lock adapted to be employed with a door hinged to a door frame with a latch plate thereon comprising, in combination, a substantially flat elongated main body member, one end of said main body member embodying tapered side edge portions and defining a bearing surface of less width than the width of the central portion thereof, abutment means projecting outwardly from said main body member adapted to be received within an opening in the latch plate mounted upon the door frame, and locking means associated with said body member adapted to abut against the door hingedly carried by the door frame to prevent movement thereof away from the latch plate thereon, said abutment means comprising a lug of substantially L-shaped configuration extending perpendicularly outwardly from said main body member adjacent to the tapered end thereof, said latch plate embodying a striking tongue portion extending outwardly from one edge thereof intermediate its ends, an opening in said tongue portion extending therethrough, the central portion of said body member comprising a plurality of transversely spaced apart rows of longitudinally spaced openings extending therethrough, said locking means comprising a washer having a central opening adapted to slidably receive said main body member and said tongue portion and abut on its inside with the outside of said door, a pin adapted to be selectively inserted into one of said openings closest to said door and extend through said opening in said striking tongue portion of said latch plate, and said pin adapted to abut the outside of said washer to fix said washer against movement in a direction outwardly of said main body member.

References Cited in the file of this patent UNITED STATES PATENTS 1,234,158 Hall July 24, 1917 1,434,411 Silverstein Nov. 7, 1922 1,627,709 Menchen May 10, 1927 1,845,038 Alderson Feb. 16, 1932 2,288,022 OBrien et a1. June 13, 1942