US1141327A - Automatic burglar-alarm system. - Google Patents

Description

L, H. GERMAN.

AUTOMATIC BURGLAR ALARM SYSTEM.

APPLICATION FILED JUNE4. 1914.

1, 141,327. Patented June 1, 1915 lmvemlioz .Loudsfl 69/ mm eyes 6 carried by the LOUIS H. GERMAN, OF LOUISVILLE, KENTUCKY.

AUTOMATIC BURGLAR-ALARM SYSTEM;

Specification of Letters Patent.

Patented June 1, 1915.

Application filed June 4, 1914. Serial No. 843,110.

To all whom it may concern Be it known that I, LOUIS H. GERMAN, a citizen of the United States of America, residing at Louisville, in the county of Jefferson and State of Kentucky, have invented new and useful Improvements in Automatic Burglar-Alarm Systems, set forth in the following specification.

This invention relates to improvements in automatic burglar alarm systems and has particular application to a system whereby a signal may be given at a distant or remote point in the event of a person attempting to effect an unlawful entry to the protected structure.

In carrying out the present invention, it is my purpose to improve and simplify the general construction of automatic burglar alarm systems of the class described and to provide a system which will embody comparatively few parts and these so correlated and arranged as to reduce the possibility of derangement to a minimum and furthermore, my improved system may be installed and maintained at a minimum expense and may be stored away quickly and conveniently when out of service so that employees in the building will be unaware of the existence of the burglar alarm system when the building is open.

With the above and other objects in View, the invention consists in the construction, combination and arrangement of parts hereinafter set forth in and falling within the scope of the claim.

In the accompanying drawing; Figure 1 is a diagrammatic view showing my invention installed in a building and connected with the doors thereof. Fig. 2 is a view in elevation of a snap hook. .Fig. 3 is a similar view of the screw eye.

Referring now to the drawing in detail, 1, 2 and 3 designate the doors of a building to be protected, while 4 indicates a box or receptacle conveniently located within the building on the ground floor thereof and preferably disposed adjacent to one of the walls of the building. Located within the box 4 is a telephone set 5 or any other form of signal transmitting apparatus. Secured to each door adjacent to the upper end thereof is a screw eye 6 and secured to the wall of the structure between the doors 1, 2 and 3 are screw eyes 7 alining with the screw doors. Passed through the alining screw eyes 6 and 7 is a wire or other flexible element and one end of the wire 8 is provided with a snap hoop 9 adapted to engage the eye 6 in the adjacent door, while connected to the remaining end of the wire 8 is an elastic cord 10 passed through an opening 11 in the door of the box 4 and having the lower end thereof connected with the receiver of the telephone set 5 within the box 4. Also connected with the receiver of the telephone set 5 is one end of an elastic cord 11 extending through an opening 12 in the bottom of the box and outwardly through an opening in the adjacent wall of the building and connected with the outer end of the cord 12 is a snap hook similar to the snap hook 9 adapted co engage an eye, similar to the eyes 6,

secured to the outer surface of the building seen that whenthe wire 8 is passed through the alining eyes 6 and the snap hook end of the wire secured to the eye on the adjacent door and the remaining end of the wire connected with the elastic cord 10, a pull will be exerted upon the wire when one or more of the doors is opened, thereby pulling the cord 10 and lifting the receiver of the telephone set 5 from the hook so that the switch controlled by the receiver hook or arm will be closed, thereby signaling the party in charge of the telephone set connected with the set 5. In order to hold the receiver upon the book when the wire 8 is being trained through the alining eyes 6 and 7, the snap hook on the end of the cord 11 is passed through the wall of the building and secured to the hook in the outer surface of such wall. The person within the building may now train the wire through the eyes and leave the building by way of one of the protected doors, as the I pull of the wire 8 on the cord 10 will stretch the cord 10 and the action of the cord 10 on the receiver be counteracted by the cord 12, thereby holding the receiver upon the receiver hook. When the party leaves the building he releases the cord 12 from the hook on the outer wall of the building, therei maybe withdrawn from the eyes and stored away in the box 4 so that the employees in the building will be unaware of the existence of the burglar alarm system.

I claim:

In an automatic burglar alarm system, a closed receptacle, a signal sending instrument in said receptacle, eyes secured to the doors of the building, a wire passed through said eyes, a fizaed connection between one end of said Wire and the eye on the adjacent door, an elastic connection between the remaining end of said Wire and the instrument in said receptacle, and means adapted to be attached to the outer side of the protected structure and connected to said instrument to hold the latter against operation and detachable from the outer side of the building to release said instrument.

LOUIS H. GERMAN. Witnesses:

WALTER L. PORTER, WILLIAM B. CRAIG.

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