US1077966A - Fire-alarm. - Google Patents

Description

W. A. FRETWELL. FIRE "ALARM. APPLICATION FILED APR. 19,1913.

, Patented Nov. 4, 1913.

nesses: .09 41- I To all. whom it may concern useful F ire-Alarm, of which the-following is A, FEE-WELL, or wILsoN, nonrn'ennonmn;

Freeman.

'Sneeification of ietterglatent.

I rat ntednov. 4, 1913 Application'filed April 19, 19l3. Serial No. 762,301

Be it known that '-I,".W1LLIAM A. Fnn'n- WELL, a citizen oft-he United States, residing at \Vilson, in the county of Wilson and State of North Carolina, have invented a new and a specification. x

The objectof thisinventionis to produce a cheap, infallible alarm that nothing will explode but fire, and to -make a;; ratproof alarm, that rats, roaches nor any vermin can destroy,' imperfectly sealed alarm that will fill its mission as-long askept dry; let- 7 tain this object'by the-device illustrated in the accompanying drawing.

' Similar letters refer 'tos'imilarparts. (A) is a rimfire, cap or fuse ignition car.-

tridge shell containing a. powder charge having a ,wad thereon, leaving a space (B) be-- tween the wad and crimped endof the shell; (D) is the cap or fuse end. (E E) are nails orscrews driven through theendsof the woven,

wire enveloplF) to hold the invention to the inside. or under houses.- This cartridge 25' (A) without my improvement would not fire-alarnror desired as such but my invention or improvement trebles at least. the detonation, and my improvement is simply this; I fill the space (B) with putty, or wax,

or plaster of Paris, or jconcrete dough. hen

more than the cartridge without it. I

3 These sealed cartridges are inclosed in a Woven ire receptacle, and tacked-up under and inside buildings ng described claim as new and wish tQscu by Letters Patent, I' i r i a plastic, such as putty, wax, lasterof Paris or concrete dough, and inclosed ina woven wire receptacle, as a fire alarm, as shown. i

"WM. A. FRETWE L;

fWlt-HQSSESL J. D. BARDIN G. W. LE IS.-

by the nails or screws (E as a fire alarnL- my invention what I give asuflicient detonation, to be vused as a this hardens, -thedetonation is. veryI-fnuch i v 4o 'A cartridge having its front end closed by

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