US150712A - Improvement in burglar-alarms - Google Patents

Improvement in burglar-alarms Download PDF

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Publication number
US150712A
US150712A US150712DA US150712A US 150712 A US150712 A US 150712A US 150712D A US150712D A US 150712DA US 150712 A US150712 A US 150712A
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block
burglar
alarms
improvement
door
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    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B15/00Identifying, scaring or incapacitating burglars, thieves or intruders, e.g. by explosives

Description

'WQ H. BEIFF.
-B .urg lar-Alarms.
Patented May 12, 1874.
I fir?! r gfl WITNESSES UNITED STATES WILLIAM H. REIFF, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF PATENT OFFICE.-
ONE-HALF HIS RIGHT TO OSBORN CONRAD, OF SAME PLACE.
IMPROVEMENT IN BURGLAR-AL'ARMS.
Specification forming part of Letters Patent No. 150,712, dated May 12, 1874; application filed December 3, 1873.
To all whom it may concern:
Be it known that I, WILLIAM H. REIFF, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a certain new and useful Burglar-Alarm; and I do hereby declare the following to be a full,
clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification, in which Figure'l is a horizontal sectional view of my invention. Fig. 2 is an end view. Fig. 3 is a side view. Fig. 4 is a detail view, and Fig. 5 is a detail view showing cartridge-recess in block and concave recess in end of spring.
This invention has for its object to provide a cheap, simple, and effective alarm of small size, which can be readily applied to bed-room doors, money-drawers, &c.
The nature of the invention consists in the peculiar construction of the device, as hereinafreception of a blank cartridge.
The operation is as follows: The clip A being screwed to the door-jamb. the block B is placed in such position that the cock B will project, as shown, so as to be struck by the door when the latter is opened. IV hen the device is thus located, should any one attempt to enter by opening the door, the cock will strike the cartridge, giving an effective alarm.
The compactness of this device will render it very desirable for travelers use, as it can, without inconvenience, be carried in the pocket and readily applied to the chamber-door. It
with the edge of the-block, rendering it more convenient for carriage in the pocket.
Among other peculiar and novel features of this invention, it will be observed, first, that therecess or bore D runs transversely instead of longitudinally with reference to the block B; hence the sound produced by the explosion of the cartridge is not .deadened,
nor is there any danger of the apparatus being wrenched from the door-frame-an accident very likely to occur when the bore runs toward the door-frame, especially where powerful cartridges are employed; second, that the screw 2, by which the spring is secured to the block, has its head raised to avoid the weakening of the spring consequent upon the countersinking of said head; also, that the hammer has a recess, at z, to receive the screwhead, and allow the hammer to fit snugly within the recess formed in the block 13 to receive it; fourth, that the plate A, while adapted to securely retain the block B in place, and efl'ectually prevent it from falling or being accidentally displaced, forms, when said block is removed, no obstruction or troublesome projection endangering the safety of the clothing of persons passing in and out through the doorway.
What I claim as my invention isi The combination of the block B, having the transverse recess or bore D, spring 0, and pivoted hammer B, all constructed and arrangedas shown and described.
In testimony that I claim the foregoing I have hereunto set my hand this 1st day of December, 1873.
Witnesses: WILLIAM H. REIFF.
M. DANL. GoNNoLLv, I EUGENE P. EADSON;
US150712D Improvement in burglar-alarms Expired - Lifetime US150712A (en)

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