US1746426A

US1746426A - Fire alarm

Info

Publication number: US1746426A
Application number: US288696A
Authority: US
Inventors: Clarence D Hotchkiss
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-06-27
Filing date: 1928-06-27
Publication date: 1930-02-11
Anticipated expiration: 1947-02-11

Description

Feb. 11, 1930.

FIRE ALARM Filed June 27, 1928 In fuefltof D. HoTcHKlss ,746,4f26V I Patented Feb. 1`1, 1930 UNITED STATES CLARENCE D. Ho'rCHKIss, or GECRCETCWN, CALIFORNIA FIRE ALARM Applicationr med June 27,

The present invention relates to improvements in signalling or indicating devices, and has reference more particularly to a lire alarm.

@ne of the important objects of the present invention is to provide a fire alarm that is particularly adapted to be placed near a stove or electric wires, so that when a re occurs, the 'devices will explode and thus give an audible signal warning of the imminent danger.

A further object is to provide a fire alarm which is simple in construction, in expensive, strongand durable, and further well adapt- `ed to the purpose for which it is designed.

Other objects of the invention will become apparent during the course of the following detailed description taken in connection with the accompanying drawing.

In the accompanying drawing, forming a part of this application and wherein like reference characters designate like parts throughout the several views:

Figure 1 is a front elevation of the fire alarm embodying my invention, showing the same supported in an attaching bracket.

Figure 2 is a front elevation thereof, and Figure 3 is a longitudinal sectional view through the device per se.

In the drawings, wherein for the purpose of illustration is shown the preferred em` bodiment of my invention, the numeral 1 designates a cylindrical shell that is preferably constructed of brass, the same beingclosed at its inner end, while the open outer end of the shell is cut to provide the bendable strip 2 as clearly illustrated in Figures 2 and 3. The innerclosed end of the shell is slightly enlarged to provide a rim portion 3 and arranged wit-hin this rim portion is the precussion element 4.

The shell is partially lled with an explosive powder 5. The wad of any suitable material and denoted by the reference character 6 is arranged within the shell to maintain the explosive powder in a packed manner in the inner end portion of the shell, and` a wooden block .7 is placed in the forward or outer end of the shell against `the wad 6, after which the bendable arms or strips 2 192s; serial No. 288,696.

are directed inwardly against the front face of the block 7 as indicated in Figure 3. The adjacent strips are thensoldered together, as at 8, thus providing a closure for the forward end of the shelland furthermore causing the cartridge to explode from the side rather than from the forward end when the explosive powder is ignited. f

The firealarm cartridge is adapted to be supported in close proximity to the stove or electric wires, by means of a suitable bracket 9 that is formed with an opening to accommodate the shell 1, and the rim portion 3 of the shell will be disposed against the rear face of the bracket and this bracket is adapted tobe secured to the stove pipe or any other support by any appropriate fastening means shown at l0.

The use of an alarm of the above mentioned character is thought to be readily obvious to those skilled in the art to which the present `invention relates and when a fire breaksout, the cartridge will be exploded, thus giving an audible signal and warning the occupant-s of the house of their imminent danger While I have shown the preferred embodiment of my invention, it is to be understood that various changes in the size, shape and arrangement of parts may be resorted to, without departing from the spirit of the invention and the scope of the appended claims.

I claim; y

1. `In a fire alarm signal, a cartridge comprising a shell open at its outer end and adapted to contain an explosive mixture, a packing in the outer end of the shell for the explosive mixture, the outer end of the shell being sealed to effect the side explosion of the cartridge.`

2. In a fire alarm signal, a cartridge comprising a shell open at its outer en'd and adapted to contain an explosive mixture, a packing in the outer end of the shell for the explosive mixture, the outer end of the shell being sealed to effect the side explosion of the cartridge, and attaching bracket for the cartridge.

3. In a fire alarm signal, a cartridge come prising a. shell open at its outer end and ada ted to contain an explosive mixture, a pac ing in the outer end of the shell for the explosive mixture, bendable strips at the open outer end of the shell adapted to be disposed inwardly across the packing, said strips being solderedtogetherto seal the outerV end of the shell and'cause sidefiringofthe cartridge.

4. In a fire alarmsignal, a cartridge comprising a shell open at its outer end and ada ted to contain an explosive mixture, a packing inthe outer end of the shell for the explosive mixture, bendable strips at the open outer end of the shell adapted to be disposedginwardly across the packing, said strips ,beingsoldered together. to seal the outer` end of Ythe shellY and, cause side firing ofxheicartrdge, thefclosedinner endzof the shell being formed with a rim portion, and anattaching bracket disposed over said shell and engaging with said rim portion.

In testimony whereof Iali-X my signature.

, CLARENCE D.- HOTCHKISS.