US2134922A

US2134922A - Locking device

Info

Publication number: US2134922A
Application number: US193478A
Authority: US
Inventors: Robert W Laing
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-03-02
Filing date: 1938-03-02
Publication date: 1938-11-01
Anticipated expiration: 1955-11-01

Description

R. W. LAING LOCKING DEVICE Nov. 1, 193

Filed March 2, 1958 2 Sheets-Shem l amen 11m 7?. M44407;

Nov. 1, 193$. R W A N 2,134,922

LOCKING DEVICE Filed March 2, 1938 2 Sheets-Sheet 2 Patented Nov. 1, 1938 UNITED STATES PATENT OFFICE 6 Claims.

This invention relates broadly to locking mechanisms and more specifically to means for temporarily preventing access to the standard latches or locks on doors.

The principal object of the invention is the provision of a locking device for use by fumigators to prevent all persons from entering a room containing poisonous gases. It may be used, if desired, in connection with danger signs, but when it is used, it is unnecessary to rely upon signs and the collecting of all keys as at present.

Another object of the invention is to provide a locking means that is quickly and easily at tachable to doors having a latching mechanism but no locking mechanism.

Still another object of the invention is the pro-vision of a device of this character that can be used in combination with various types and sizes of standard door latching and locking mechanisms,

Other and more limited objects of the invention will be apparent from the following specification and the accompanying drawings forming a part thereof wherein Fig. 1 is a perspective view of my invention showing it in use; Fig. 2 is a central vertical section thru one form of my invention; Fig. 3 is a section taken on the line 33 of Fig. 2; Fig. 4 is a horizontal section taken on the line 4-4 of Fig. 2; Fig. 5 is a view similar to Fig. 2 showing my device applied to a door having a different type of latching mechanism and Fig. 6 is a view similar to Fig. 2 showing one way of applying my invention to a door having only a locking mechanism thereon.

Referring to the drawings by reference character, l indicates a door, 2 the door jamb and 3 the latching and locking mechanism. The latch- 40 ing and locking mechanism 3 is of any well known standard construction having the usual latching bolt 4, which is spring pressed into engagement with the keeper 5 when the door is closed, and the key operated locking bolt 6. The latching bolt 4 is withdrawn from the keeper 5 by turning the knob I. All of the structure just described may be of any well known construction.

My invention consists generally of a box like cover ii, which is placed against the door I in such manner as to completely enclose the accessible parts of the latching and locking mechanism 3; and a locking and retaining means III for securely holding the cover 8 in position.

The cover 8 comprises a bottom wall II and side walls l2 formed integral therewith and pro-- jects outwardly therefrom. While the cover 8 may be made of any desired size I prefer to make it fairly large so that it may be used to cover latching and locking mechanism of various shapes and sizes. The bottom wall H has a plurality of pairs of apertures I3 therein, for a purpose to be described hereafter.

The locking and retaining means In shown in Figs. 1 to a inclusive consists of a short length of chain M and a standard bicycle type of lock comprising a lock proper l5, and a U-shaped element it having the usual notches I! in legs [6 thereof.

In operation the chain I4 is wrapped around the reduced shank i of the knob 1 and the U-shaped element I6 is inserted thru links adjacent each end of the chain. The cover 8 is then placed against the door in such a manner as to completely enclose all accessible parts of the latching and locking mechanism and the legs 16* of the U-shaped element l6 are projected outwardly thru one pair of apertures lit. The lock proper I5 is then locked into the position shown, tightly engaging the legs Is of the U-shaped element It, and the cover 8, thus preventing access to the latching and locking mechanism 3 and making it impossible for anyone not having a key to lock I5 to open the door I. Having a plurality of pairs of apertures l3 in the bottom wall H of the cover 2 makes it possible to easily accommodate the cover to various different types and sizes of latching and locking mechanisms as desired.

In Fig. 5 I have shown a difierent type of latching mechanism. In this form the chain I4 is dispensed with and the U-shaped element engages the bail l8 of the latching mechanism.

In Fig. 6 I have shown my device applied to a door having no latching mechanism and a looking mechanism having no projecting parts to which the cover locking and retaining mechanism in may be secured. In instances of this kind an eye bolt I9 is screwed into the door and the U-shaped element I6 is inserted thru the eye 20 thereof.

From the foregoing it will be apparent that I have developed a very simple, cheap, and efficient device for accomplishing the objects of my invention.

It is to be understood that I do not intend to restrict my invention to the specific construction and application shown and described herein, as various modifications and applications thereof are possible within the scope of the appended claims.

Having thus described my invention, what I claim is:-

1. In a device of the character described, the combination of a cover, having bottom and side walls, for completely enclosing the latching mechanism on a door, apertures in the bottom wall of said cover, a chain secured to the latching mechanism within the confines of said cover, a U- shaped element inserted thru links of said chain and extending outwardly thru said apertures, and a lock engaging said U-shaped element and said cover for holding said cover in place and preventing access to the latching mechanism.

2. In a device of the character described the combination of a cover having bottom and side walls for completely enclosing the latching mechanism on a door, apertures in the bottom wall of said cover, a fiexible member secured to the latching mechanism within the confines of said cover, a U-shaped element engaging the flexible member and having the legs thereof extending outwardly through said apertures, a lock engaging the outwardly extending legs of said U shaped element and said cover for holding said cover in place and preventing access to the latching mechanism.

3. In a device of the character described the combination of a cover having bottom and side Walls for completely enclosing the latching mechanism on a door, aperture means in the bottom wall of said cover, a flexible member secured to the latching mechanism within the confines of said cover, means engaging the flexible member and extending outwardly through said aperture means, a lock engaging the outwardly extending portion of said means and said last mentioned cover for holding said cover in place and preventing access to the latching mechanism.

4. In a device for temporarily preventing access to the latching mechanism on a door, the combination of a cover for completely enclosing the latching mechanism thereof, said cover being of such size and shape as to be applicable to various types and sizes of latching mechanisms and com prising side walls, and a bottom wall having a plurality of spaced aperture means therein, a flexible element secured to the latching mechanism within the confines of said cover, means engaging said flexible element and extending outwardly through one of said aperture means, and a lock engaging the outwardly extending portion of said means and said last mentioned cover for holding said cover in place against the door and around the latching mechanism.

5. In a device for temporarily preventing access to the latching mechanism on a door, the combination of a cover for completely enclosing the latching mechanism thereof, the said cover being of such size and shape as to be applicable to various types and sizes of latching mechanisms and comprising side walls, and a bottom wall having a plurality of spaced aperture means therein, means secured to mechanism on the door Within the confines of said cover and extending outwardly thru one of said aperture means, and a lock ongaging the outwardly extending portion of said means and said cover for holding said cover in place against the door and around the latching mechanism.

6. In a device for temporarily preventing access to the latching mechanism on a door, the combination of a cover for completely enclosing the latching mechanism. thereof, the said cover being of such a size and shape as to be applicable to various types and sizes of latching mechanisms and comprising s de walls, and a bottom wall having a plurality of pairs of apertures therein, a U-shaped element engaging mechanism on the door within the confines of said cover and having the legs thereof extending outwardly thru one of said. pairs of apertures, and a lock engaging the outwardly extending legs of said element and said cover for holding said cover in place against the door and around the latching mechanism.

ROBERT W. LAING.