US951625A - Air-operated fire-extinguisher. - Google Patents

Description

P. L. WILBUR.

AIR OPERATED FIRE EXTINGUISHER.

APPLICATION FILED MAR. 30, 1909.

Patented Mar. 8, 1910.

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AIR OPERATED FIRE EXTINGUISHER.

APPLICATION FILED MAR. 30, 1909.

951,625. Patented Mar. 8, 1910.

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AIR OPERATED FIRE EXTINGUISHER.

APPLICATION FILED MAR. 30, 1909.

Patented Mar. 8, 1910.

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V Specification of Letters Patent.

Patented Mar. 8, 1 910.

Application filed March 30, 1909. Serial No. 486,787.

To all whom it may concern:

Be it known thatI, PETER L. WILBUR, of

the borough of Bronx, city and State of New York, have invented a certain new and useful Improvement in Air-O erated..I*irellxtinguishers, of which the ollowing is a specification. i

The present invention embraces a tank the valve-controlled dischar e of a fire extinguishing liquid from which is eflt'ected by compressed air forced into the tank by a pump.

It is an object. of the present invention to provide a simple construction for the purpose, easily manipulated to charge the tank with air and the discharge of liquid from which may be readily controlled by the fingers of the hand applied to the pump handle.

In the drawings accompanying the present specification Figure 1 is mainly a longitu dinal section through an air operated fire extinguisher embodying my invention, part being broken away. Fig. 2 is a perspectlve of the pump barrel part being broken away. Fi 3 1s a similar view of the hollow piston r0 adapted to work therein. Fig. 4 shows a hand-o erated valve stem for controlling the liqui discharge, there being also indicated at the right of this figure a sectional perspective of the crank and its mounting for operating this stem. Fig. 5 is a perspective' of the pump handle which also serves as a means for handling the tank, the chamber for the mentioned crank: being indicated. Fig. 6 is a perspective of the swivel'connection to the tank, the flexible discharge hose fastened to the connection being also shown. Fig. 7 is partly an elevation, partly a section on a reduced scale of the tank and its associated parts, the air pump piston rodbeing in itslowermost positlon. Fig. 8 shows this rod in an elevated position. Fi 9 is an enlar ed detail of the lower end 0 the pump barre and shows the piston and valve construction. Fig. 10 is a sectional detail showing a modified construction of pump handle and discharge control. Fig. 11 is a crosssection of Fig.10.

Similar characters of reference designate correspondin parts in all figures.

The tank or holding the fire extinguishink liquid may be of any suitable construction and is usually, thou h not necessarily, made of portable gize. n the drawings it is designated by xand is adapted to hold water'or other fire extinguishing liquid as this rod 5 is hollow.

indicated, this liquid being subjected to and eyected by the pressure of compressed air in t 1e upper part of the tank. This air is pressed into the tank by an air pum whose plunger or piston is conveniently an as here represented, operated by the handleprovided for lifting and carrying the tank. That is to say 2 in Figs. 1 to 9 inclusive and 2' in Figs. 10 and 11, designate the aforesaid handle, and 3 the compression pump barrel or cylinder secured to a perforated cap 3 havin a threaded connection with a fixture 4 of the can top and forming a tight joint therewith by the compression of a washer 4' after the filling of the tank and the reinsertion of the pum barrel. flow of the liquid from the tank here takes place through the piston rod of the pump, At its lower end it is provided with a piston or plunger between which and a follower nut 5 a cup shaped washer 5 is secured. As disposed. in the drawing this washermay collapse somewhat to permit the passage of air past it during the ascent of the piston but it expands against the sides of the pump barrel upon the descent of the piston, forcin the inclosed air past valve seat 5 at the E) of the pump barrel, when the tension of the air is suflicien t to overcome the tension of the closing sprin of the inwardly closing or check valve 6 mounted in valve casing 6 at the lower end of the pump barrel, the air ultimately passing through openings 6 in the easing into the interior of the tank.

As already stated the issuing liquid passes upward through hollow piston rod 5 and out.

through a part rigid with the handle, its passage being controlled by a valve'readily manipulated by the fingers of the hand grasping the tank-pump-handle. In both the constructions set forth in Figs. 1 to 9 'inelusive and in Figs. 10 and 11, the piston rod is secured to a hollow extension 7 of the handle and is guided by a guide' late 7 having cut away portions 7 for t e inlet:

Since the outward war end against stem 12 of valve 6' forcing the-latter squared plug end .10 of extension 7 which from its seat a ainst the tension of s The liquid under the tension of the mclosed air can then pass outward through screen '13.

Referring now to the means disclosed in Figs. 1 to 9, inclusive, for operating valve the stem-is pro--- stem 11', at 1ts upper end vided with a slotted oke, see 14, by means secured to the valve stem 11' pin 20 extends; this through port 21, the bore of ofwhich the stem is 14; on a-rock shaft 14: mounted in a bearmg ina threaded plu 14 screwed into the side of the hollow tan t-pump handle fixture 14.

A finger piece 15 is secured to this rock shaft in convenient reach of a finger of the hand cate ixture 14 terminates in a conical socket 16 in which 'a fitting 16" may be, swiveledby a con ling 16 this fitting hav-v ing provislon for t e attachment of anozz'leended flexible hose 17. 1

' According to the construction set forth in F i 10 and 11, handle2' is likewise rovi ed with a hollow'extension 7 to w ich hollow coupling member 8 as before. Extension 7 here extends from a central body part 18'. to a rod like extension'18' of which 7 18 is secured by anut 18.

'side of the body threaded wall 0 this recess en ages a tubu-r -lar part 19 0n which is rotataby mounted .a I .gri 19 this latter being shown with a metel-1c lining 19 a grip art is recessed and with the Within, tubular part 19 is mounted a tubular shaft 20' having at one end a crankpin 20' extendingthrough the opening in a; slotted cross head or yoke 20 already described. At its opposite end tubular shaft 20 has affixed to it a disk 20- from which a pin enters grip 19 which, therefore, when turned rotates shaft 20 and henceactuates stem 11"throu'gh the aforesaid crank pin and cross head connection. The actuation of this stem serves to control the-outflow of the tank liquid in the manner referre'dto, the issuing liquid passing upward throughthe hollow'p1ston rod, shaft 20 and outward through .a'fittin 22'- (for the attachment of 'aflexible ose not shown) pressed againstpacking 22' in -a retaining nut22 I Having described my invention, I claim: 1. A fire extinguisher comprising in-compring 6.

hollow-4 ung froma. crank pin graspingvhandle 2. A stop 15 is also indi-' fva'lves assoc ated-with sai for-permitting airsto fbe forced mto and piston rod 5 is secured and associated" w1th. shoulder 8'. on such extension 13-11" secured m said ta The opposltebination a tank, a compression air barrel extendin thereinto, a hollow iston rod,a check va ve associated with sai bar ;b arrel,; a piston working in said barrel a iston-rod,'la. pressureholding va ve "ongsa di-piston in close proximity to -s'ald'first mentioned valve when the pistonis depressed, a valve stem secured to the second mentioned valve 7 and extending through isaid hollow piston rod, and means for actuating said stem and thereby said valves-to permit an outflow.

3. In a fire'e'xtinguisher the combination of -a tank, a. compression air pump barrel secured thereto, a piston and hollow piston rod working in sm to said piston rod, means or detachably securing the piston rod ri idly to thetank',

5 piston and barrel held the tank, and means for forcing said valves ffromrtheir seats against the tank pressure for the urpose'. specified. I

4.3- In ,a fire extlngu-isher' the combination of a tank,fa.fnfairgpump barrel removably bottom of. the. barrel, a valveeprovided piston, a hollow piston rod, a handle secured to saidfpi'ston. rod a con ling-for ri 'dly -con1 1ecting' the piston 5, a

to. the ta valve stem extending through the hollow piston rod'means for actuating said valve stem, a hollow part movable with the handle whose-borecommunicates the bore of said piston rod, and a flexible hose connected to said part. I v

5. In a fire extinguisher-the combination of a.tank,-a compression air pump having a barrel and a hollow piston rod, a piston, a check valve at the bottom of the barrel a valve in said piston, the opening of t e latter valve serving by contact to 0 en said check valve, a valve stem extending om the valve in said piston to'the tank exterior, and a hollow part movable with said piston rod, and whose bore communicates with the bore of said hollow piston rod.

Inwitness whereof Iv have signed this specification in the scribing witnesses.

' PETER-L. WILBUR.

Witnesses:

Presser: L. Wms, WILLIAM E. Gowpnr;

,' aoheck valve at the barrel% a handle secured pr wence of two sub-

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