US2365758A - Nozzle for pump type fire extinguishers - Google Patents

Description

Dec. 26, 1944. A. G. HORVATH 2,365,758

NOZZLE FOR PUMP TYPE FIRE EXTINGUISHERS Filed May 27, 1942 2 Sheets-Sheet 1 INVEN'MR ANTHONYGHIRWIW,

ATTORNEY-f Dec. 26, 1944. A, HORVATH 2,365,758

NOZZLE FOR'PUMP TYPE FIRE EXTINGUISHERS Filed May 27, 1942 2 Sheets-Sheet 2 I mvzu'ron,

BY ANTHONY aHonvnm ATTORNEYS Patented Dec. 26, 1944 UNITED STATES PATENT OFFICE NOZZLE FOR PUMP TYPE FIRE EXTINGUISHERS Anthony G. Horvath, Dayton, Ohio, assignor. to The Dayton Pump & Mfg. Company, Dayton, Ohio, a corporation of Ohio Application May 27, 1942, Serial No. 444,688.

3 Claims.

This invention relates to fire extinguishers of the hand operated type wherein there is provided a pump for supplying fire extinguishing fluid under pressure.

An object of the invention is to provide a fire extinguishing apparatus having a nozzle that is constructed and arranged to discharge a stream of fire extinguishing liquid or may be operated to break the stream into a very fine mist for extinguishing incendiary bombs or other high temperature flame-producing metals and chemicals.

'Another object of the invention is to provide a fire extinguishing apparatus that can be used for extinguishing ordinary fires or for extinguishing high temperature flame-producing materials suchas'magnesium, thermite and others.

Further-objects and advantages will become apparent from the drawings and the following description.

In the drawings: i

Fig. 1 is a vertical cross-sectional view of the fire extinguishing apparatus of this invention."

for the fire extinguishing device shown as usedfor discharging a continuous stream of liquid.

Fig. 4 is a cross-sectional view of the nozzle shown as used for breaking the stream of liquid into a fine mist.

This invention relates to a fire extinguishing apparatus that is provided with a hand operated pump fordischarging a stream of liquid under pressure. The apparatus is of the type known as a tank type fire extinguisher that is selfcontained in that the supply tank, the pump, and the discharge hose are constructed and arranged as a unit. More particularly, the apparatus is of the type adapted to be placed upon the floor or other solid support and held in position by a foot clamp or pedal so that the pump on the device can be operated by a single per-- son. While the invention described herein refers to a' particulartype of fire extinguishing device, yet it is understood that various features" of construction shown and described. in the apparatus can be used in fire extinguishing devices of other types. The various structural features can be used inthe small hand type of fire extinguisher as well as in the tank type herein disclosed. p

In this invention the fire extinguisher consists of a supply tank It having a bottom wall H and a top wall I2. The bottom wall H is provided with an annular flange l3 that is disposed against the supply tank Ill, and the bottom edge of the tank '10 is formed over the flange I3 to seal the bottom wall to the tank wall I0- The top wall I2 is provided with an annular flange [4 that engages the tank wall [0 and is spot welded thereto. An annular ring I5 is disposed about the tank wall It adjacent the bottom end thereof and is suitably secured "to the tank wall by means of spot welding. A bracket I6 extends outwardly from the annular ring l5 and is provided with a foot pedal I1 hingedto the bracket IS.

The top Wall I2 is provided with an opening [8 through which a pump 20 extends. A second opening 2| is provided in the top wall l2 that provides'a filling opening for the tank l0 and is closed by means of a cover 22 that is hinged upon the pair of upwardly turned legs 23.

The pump 20 consists of an outer cylinder 26 that provides the pumping cylinder. The lower end of this cylinder is provided with a check valve that consists of a valve seat member 26 threaded into a valve retaining member 21. The lower end of the cylinder 24 is provided with an inwardly turned flange that is clamped between the valve seat member '26 and the valve retaining memberZl. A wire cage 29 is attached to the valve seat member 26 and retains a ball check 30 in position upon the valve seat member26. The valve seat member 26 is provided with, an opening 3| through which liquid can pass and the valve retaining member 21 is provided with openings 32 to permit flow of liquid from the interior of the supply tank l0, through the' valve seat member'ZBand into the cylinder The pump 20 is also provided with an inner piston rod 33. This piston 'rod' is inthe form of a cylinder, and has a foot valve 35 disposed in the lower end of the cylinder. The foot valve it consists of avalve seat member 36 having'a fiange on the upper end thereof adapted to engage an inwardly turned annular flange provided on the lower end of the inner cylinder 33. Acentralopening 42 is provided through the'valve seat member' 36 and is adapted to be closed by a ball valve 43. A wirecage 44 is carried by the valve seat member 36 for retaining the ball valve 33 in position adjacent the passage 42.

The upperend of the outer pum'p' cylinder 24 "is provided with an enlarged portion 50 that restroke.

outer cylinder 24 by means of a bayonet lock. The inner cylinder 33 extends through the ring 53 and has a flange 55 on the upper end thereof confined between a nut 56 and a boss 51 provided on the pump handle 58. A felt washer 59 is disposed upon the inner cylinder 33 between the nut 56 and the ring 53 in the upper end of the outer cylinder 24 to absorb the downward motionf the handle 56 when completing its downward per end of the inner cylinder 33 to seal the same.

A spring 6! is placed between the ring 53 and; the upper packing gland to compress the. packsing material 52 to seal against the inner cylinder. 33. A spring 62 is placed around theinner cyl inder 33 to absorb the shock at the upper end of; the stroke of the cylinder 33.

The pump is inserted through theiopening; I8 in the top wall 12 of the tank l0 so that/ t flange 63 secured to the outer cylinder 24'engages the upper surface of the wall l2. The; flange, 63 is secured to the wall. l2. by. means of the,- screws 64. The pump head and pump cylinder; are constructed from a. continuous tube, whi h chamber 48 will be discharged through the discharge connection 65 and the hose 66. During this portion of the stroke liquid will be drawn within the outer cylinder 24 below the foot valve 35 through the bal1 check thus filling the chamber. On the downward stroke of the inner cylinder 33 liquid below the foot valve will be forced through the foot valveinto, the interior of the inner cylinder 33; which normally stands A rubber plug 60 is provided in the up -..10 full of liquid, so that the liquid entering the cylinder 33 will pass through the openings 49 into the discharge chamber 48 thereby causing liquid inthechamber 48 to be discharged through the discharge, connection 65. It will thus be seen that; the pump will; produce a continuous flow 20 the hose 66 be positioned below the level of the ank.

Suitable handles ll are; provided for carrying the device from' place; to place.

While the device disclosed and describedlhere-i.

aids the process. of porcelain enamelingthdpllmni 25v in; is a preferred form: of; the; invention, yet it is parts, also the use ofscrews andscrew threads.- have been limited to a minimum to reduce danEQl; of damage to the porcelain enamel surface off the pump tubes.

A discharge connection 65. is provided in,4the upper end of the outer cylinder 24. and, has a. hose 65 secured theretoadapted to. be wound around the tank l0 when the fire. extinguishing. device is not in use. Av suitable hose clamp .61

retains the free end of the hose against. thewall.

comprising anelongated substantially cylindrical;

of the tank.

The nozzle 68 for thehose. 66,.consistsof an elongated substantially cylindricaleshaped body having stepped recesses 66 in one end thereof.

to, be, understood that; the; structure of the appa.v ratus; is capable of modification. without. depart-H ingfrom the spirit ofthe invention, andthat. all such modificationsas fall within'the. scope-of:

the appendedclair ns are intended .tobe included.-

herein. 7

Having thus ,fully. described my; invention, what I claim, as 1 new i and, desire to, secureby, Letters Patent, is;

1, Agno zzl e for a fire; extinguishing. apparatus;

plastic body, a passage through said body. to vpermit emission of a streamiofliquid; a closedcoiled' spring enclosing a portion of said body, said:

adapted to engage theend ofthe. hose. 6.6 which. spring having a cone-shaped end. that, extends is clamped thereon. by means of. a hosetclamp. 10. A flange H limits the movement tof.the.noz-.. zle into the hose 66. A. central passage, 12. is; provided through the nozzle.6.6.. through which. liquid is discharged.

A close woundvspring 13 is adapted to be. posie tioned around the nozzle projection l Land has. one end thereof engaging, a.recess.. 'l5.to retain. the spring in position upon the nozzle projection.

beyond the. discharge end. of: said nozzle that n rma y oa al w th th i argenassage in. i y. i pri bein adaptedto. be. de-

flected to intercept a stream of liquidemitted;

from sai z eo b akin tream in d. azfine 74. The forwardend T6. of the :closed springis 5 mit emission of a stream of liq .a.radi al. .flangei provided' witha decreasing taper. to gradually; close the end of thespring, butleavinga cen-. tral opening 11 through which the. streamol,liq-.. uid from the nozzle projection. l4...can;.be. dise.

xtendin from: a d o y, ai ibodyihavin z a aper d... t pped. port cn. xtendin frnm; said. flange, toward one end thereof ;to: provide; a host; connection, a; closed; coiled,- spring; enclosingv a;

charged without interference when the spring; portion of. aid hudmsaidsnring hayingmxt onea- 13 is in co-axial alignment with thenozzleeprojection 14 as shown in Fig. 3.

When the liquid discharges from theinozzlei in the manner shown in Fig. 3-, it can be -.used.;to-. extinguish ordinary J fires.

" shaped end thakextends eyondithe; discharge d. of. saidnozzlethat-is normallyccoraxiatwith. thediwharge. passa e; n said body; said: spring: ein dapted; to. be. defle ted; o: tercept. a1

InFig-. 4, however; streamerliquidlemittedtfromsaidnpzzle tQ-break:

the taper or conica1 end l6.of.the spring l3 is.r the stream intoa fine:mist;

shown in a deflected position so that the. axis. of the taper or coneis not co-axial with the axis of the nozzle projection 14,. whereby the strea n.

1 An z e for a-fir e xt nsuishin ;apparatus. mprisin an .el n ated-substantially cy in r al body. a ssa ethroughsaidbody to'ypermit 8111135,

of liquid discharging from the passage 'lzfiwill sionof a streammfliquida, closed coiledispring strike the inner surface of the springl3and be deflected to break the stream intoa ,iinemist. When the streamis thus broken it can be ,used for extinguishing high temperaturefiresisuch. as

that resultin from t r n s of. hemica s nd; 79;, qiseid. prinabdns; da ted: to. eflect-cr me;-

metals such as, magnesium and therrnite The operation of the deviceissuch that whenz the, inner cylinder 33 of the pumpin is In oyed pwardly. li u d trapped th n. he 1 3112111 4.

n l ing a: p r i n of i id; body; and; havingxan; d. hat xtends e ond. hed ch r e end- 0t. ai n zle at s; normall oax al th; the dis=- har e. nassaeein aid cs y.thevex endins nd-5 intercept a stream of liquid emitted from-,saida nozzle to break the str a n a fine. mist:

Gr .HOR'VAIHM

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