US395906A - Fire-extinguisher - Google Patents

Description

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W s es am- PIRE EXTINGUISHBR.

J. KANE.

2 Sheets--Sheet I Patented Jan. 8, 1889.

(No Model.) 2 sneetsneet 2. J. KANE. HRB 'EXTINGfUIfSHl-:Rl

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JOHN KANE, OF PHILADELPHIA, PENNSYLVANIA.

FIRE-EXTINGUISHER.

SPECIFICATION forming part of Letters Patent No. 395,906, dated January 8, 1889.

Application tiled October 9, 1888. Serial No. 287,701. (No model.)

To aZZ whom it may concern:

Be it known that I, JOHN KANE, a citizen of i the Unit-ed States, and a resident of Philadelphia, Pennsylvania, have invented certain Improvements in Eire-Extinguishers, of which the following is a specification.

My invention consists of animprovement in that class of lire-extinguishers known as drypipe systems, in which the water or other eX- tinguishing-tl uid is normally prevented from entering the sprinklii'ig-pipes of the system, 1he controlling-valve being kept in the closed position by devices under control of a piston or diaphragm acted on by a pressure of air in the sprinkler-pipes or in a secondary system ol' pipes, likewise provided with plugs or valves retained in position by fusible solder, so that the lowering of pressure in the airpipe, duc tothe escape of air therefrom on the melting of one or more ot' the fusible retainers, will permit the release ct' the valve in the water-pipe and the How ot' water into said pipe and through such of the sprinklers thereon as may have been released by the heat.

The object ol my invention is to provide simple and eiiicient means whereby the movement of the piston or diaphragm in the air system is caused to control the act-ion of the valve in the water-pum.

In the accompanying drawings, Figure l is a diagram slunving sul'n'cient ot a dry-pipesystem tire-extinguisher to illustrate my invention. Fig. 2 is a similar view showing some ot' the parts in a dilt'erent position, and Fig. il is a detached perspective view of that part of the device to which my invention particularly relates.

A represents the water-pipe, which may have both a supply branch, A', from the streetmain and a supply branch, A2, from an ele vated tank. This pipe is provided with a number of sprinklers, a, ot any desired character, kept closed by fusible retainers, a valve, b, being interposed in the pipe A between the supply branch and the lirst sprinkler ot the series, and this valve being normally closed, so as to prevent the passage ot' water beyond the same or its access to the system of sprinklerpipes. The stem ol' the valve is connected to a lever, B, one arm of which is provided with a weight, d, while the other arm is furnished with a bell-crank lever, D, lforked at the fnll crum, so as to present two short arms, which are notched at their upper ends for the reception of pins or trunnions f, projecting from opposite sides of a weight, F, of such a character that the preponderance of weight is on that arm of the lever B carrying the lever D, so that the valve Z) is kept closed to its seat.

The upper or supporting ends of the short arms of the lever D are, when the latter is in its normal position, as in Fig. l, slightly inside of a vertical line passing through the fulcrum of the lever, so that the tendency of the weight Fis to maintain the lever D in this position. It, however, the inner end ot' the long arm of the lever D is lifted, so as to throw the upper ends of its short arms to the other or outer side of said vertical line, the tendency of the weight will be to continue the movement until it is finally discharged from the short arms of thele'ver, and the valve-lever B is thereby relieved of the weight F, so that the weight d on the other arm `ot the lever acts to li tt the valve b and permit the flow of water into the pipe A and to the sprinklers. A dry-pipe system of this character is usually employed in connection with a supplementary air-pipe, G, which has distributed throughout its length valves s with fusible retainers', this pipe communicating with any suitable pump or other air-forcing device, and having in the present instance a branch, 7i, upon which is mounted a casing, I, containing a flexible diaphragm, y2', the stem of which is connected to a lever, K, hung to a suitable bearing on the casing. A cylinder and piston may, as will be evident, be substituted for the casing and diaphragm, if desired.

One arm of the lever K is provided with a weight, m, and its other arm is connected by means of a cord, chain, or other suitable dei vice, fn, to the long arm of the lever D, constituting the tilting weight carrier of the valve B.

The normal pressure oli' air in the pipe G i and within the casing I is sutticient to raise the diaphragm i therein, so as to lift the weighted arm of the lever K and relieve the chain fn from tension; but upon the melting of the fusible retainer on any one of the Valves in the pipe G the air is permitted to escape from said pipe and from the casing I, and the pressure beneath the diaphragm f1'. is thereby IOO i' inin Thu anniv the discharge

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