US1256874A

US1256874A - Fire-extinguisher.

Info

Publication number: US1256874A
Application number: US10418916A
Authority: US
Inventors: Walter T Charles
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-06-17
Filing date: 1916-06-17
Publication date: 1918-02-19
Anticipated expiration: 1935-02-19

Description

W. T. CHARLES.

FIRE EXTINGUISHER.

APPLlcArsoN r|.LED1uNE11.1916.

WALTER T. CHARLES, OF CHICGO, 7.1113115013.

EXRE-EXTNGUSHER.

Specification of Letters Pate-at.

patented SL99 1.91%.,

Application l'ecl June 17, 1916. Serial Sie. 104,193.

To all 'whom it may concern.'

Be it known that 1, WALTER T. CHARLES, a citizen of the United States of America, and a resident of Chicago, county of Cook, and State of illinois, have invented certain new and useful improvements in Fire-EX- tingiiishers, of which the following is a specification.

The main objects of this invention are to provide an improved charging apparatus and particularly vone which is adapted for use as a fire extino'uisher; to provide improved means wherey the apparatus will discharge substantially all of' its contents regardless of the position in which it is held; and to provide an improved apparatusof this kind in which the liquid is discharged'by a double acting pump located within the liquid-containing casing.

An illustrative specific embodiment of this invention as applied to a fire eatin-` guisher is shown in the accompanying drawings, in which-'- l Figure i is a iongauaimi Section Iof the re extinguisher,

kthe piston position which it occupies during an upward stroke.

Fig. 2 is a detail showing the piston in a position relative to its operating stem corresponding to a downward stroke.

Fig. 3 is an enlarged detail of the valve head and seat which close the discharge outletrwhen the device is not in use.

Fig. 4 is a perspective view of the air inlet pipe.

Fig. 5 is a detailof the inwardly facing flanges which are engaged by shoulders on the piston rod for locking the outlet closure.

1n the construction shown in the drawings, an elongated tubular'casing 1 is provided with caps 2 and 3, brazcd on the opposite ends thereof to form a receptacle adapted to contain a. fluid. The end 2 of the receptacle is provided with a filler opening' having a plug i threadedtherein. A pump cylinder 5 is rigidly mounted in the center of the receptacle 1. and is supported at its lower end by a tubular fitting 6 threaded therein. A piston 7 is slidably mounted in the pump cylinder 5 and is mounted on the lower end of a relatively large piston rod 8, the upper end of which is shaped to form a handle 9. A

A. suitable stuffing-box 10 is provided to prevent leakage hetweenthe piston rod 8 form of liquid-diej' being in the and the upper end or .the pump cylinder 5, and a suitable stuflingdoox 11 prevents lealt- .age between the piston rod 8 and the cap 2.

ln the specific form shown the piston rod S is tubular and the lower end is threaded to receive an end piece 12 on which the piston piece 12 is provided with upper and lower stop shoulders 13 and 14. respectively for limiting the sliding movement of the piston and is also provided with an elongated slot 15, the lower end of which is spaced slightly above the shoulder 14 and the upper end of which extends above and past the shoulder 13.

The lower end 3 of the device is concave and has a discharge nozzle 16 passing therethrough and threaded iiito the tubular fitting 6 which supports the lower end of the pump cylinder 5. rthe nozzle 16 has a central passage 17 the inner end of which is flared and the surrounding rim of which is shaped to form a valve seat 18.

The lower end of the pump cylinder is closed by the fitting 6 which is provided with a central tends a valve stem 19 having a valve head 20 at'its lower end adapted to coact with (the valve seat 1S. Surrounding the stem 19 above the fitting 6 is a coiled compression spring 21 which bears against the itting and a top part 22 on the valve stem, said compression spring being adaptedto urge the valve head 20 away from the valve seat 18.

aperture through which eX-l Z is slidably mounted. rThe end j The top 22 ofthe valve stein is located Means are provided for locking the piston rod in its lowermost position and comprises a pair of inclined shoulders 24ffornied on the lower end of the end-piece 12 in position to wedgingly engage. the under side of the inwardly' facing flanges 25 on the interior of the pump cylinder 5.

A valve casing 26 is rigidly mounted on the pump cylinder 5 medially of its ends., and a pair of

flexible discharge pipes

27 and 28 are provided each having one en mounted on and communicating with op;

osite ends respectively of said valve casing.

he other ends of said pipes are free and are surrounded by suitable weights 29 and the valve 30 respectively .for causing said ends to fall by gravity so that one or the other will reach the lowermost part of vthe receptacle regardless of the position in which the fire extinguisher is held.

The valve casing 26 comprises a body part having a centrally loeatpd longitudinally disposed passage 31 surrounded at each end by protruding

annular rims

32 and 33. The interior of the body part is cut away at each end and a pair of caps 3l and 35 to which the flexible discharge pipes are secured are slipped thereover, forming annular chambers of somewhat larger diameter than the passage 31. A

Means are provided for closing the ends of the passage 31 comprising a pair ot cupshaped

valve heads

36 and 37 disposed with their open ends facing each other and connected together by a stem 3S which passes through and is considerably smaller than the passage 31. The flanges or rims et' the cup-

shaped valves

36 and 37 have sliding lit over the protruding

annular rims

32 and 33, and are provided with ports 39 located so as to provide communication between the passage 31 and one or the other oi the chambers at the ends thereof. The valve heads are slidable by gravity and being connected by the stem 38 move as a unitl so as to provide communication through the` ports of one valve when shifted to a position to cut oli' communication through the ports in .the other valve and vice versa.

Means for providing communication loetween the passage 31 and the lower end et' the pump cylinder 5 are providedand eemprise a pipe l0 disposed longitudinally et the pump cylinder and preferably diametrically opposite the valve casing 26. The lower end of the pipe 1.1.0 communicates with the interior of the pump cylinder 5 and the upper end is bent around the pump cylinder and is attached te and eommiilnieates with 26. Il ball check valve l1 is provided t'or stopping any back flow of fluid.

The upper end ot' the pump cylinder 5 is provided with a discharge opening which communicates with tl i ilar fitting (l by means oit a pipe l2 w c. also preiierai. v disposed along the pump inder diametracally opposite the valve eas 2G.

Means are provided for introducing' air into the receptacle 1 as the liquid is pumped out, in order that a vacuum may not be formed in the easing, and comprise a small pipe 43 having one end which passes through. the cap 2 so as to communicate with the atmosphere, said end being located so as to be covered by a downwardly Haring cap secured tothe piston rod 8. Yllhe pipe L13 leads down into the receptacle and-is bent so as to forni a complete circle about the upper end 'of receptacle then continues.

4siphoning of the liquid iger-seva downward to the lower end of the receptacle, where it is similarly bent. This disposition of the air inlet pipe insures that whenever the outer end or' said pipe 43 is below the level of the liquid in the casing there will be some part of said pipe which is above such liquid level and which will provide an air pocket preventing the escape of the liquid through said pipe prevents any from the fire extinguisher.

ln the operation ofthe apparatus the receptacle may be filled with lire extinguishing liquid through the filler opening, which has a removable plug 4. The piston rod is initially' thrust inward to its full limit and turned to the right, so that the inclined shoulders 24 wedgingly engage under the inwardly facing flanges 25. Thus the valve stem 19 is shifted downward against the aetion of the spring 21 so 'that the valve head 2O eoacts with the valve seat 18 and effectually prevents any escape of liquid from the apparatus.

lllhen it is desired to use the apparatus the handle 9 isturned to the left, thereby disengaging the shoulder 2% and allowing the spring 21 to raise the valve head 2.0 from the valve seat 13. The handle is then reciproeated in the usual manner of puni ing. 1When the handle is pulled outward the piston 7 is engaged by the shoulder 14 of the end piece 12 and the movement of the piston then causes the lire extinguishing liquid to be drawn inward through the suction valve casing 26 and pipe 110. 0u the return stroke when the piston rod is thrust inwardly the piston 7 is engaged by the shoulder 13 as shown in Fig. 2, thus allowing liquid in the lower part oli the cylinder 5 to into the elongated slet 15 and through the piston i', the checl' valve l1 preventing back iow of the liquid into the receptacle 1. The piston rod 3, however, is of comparatively largediameter and consequently displaces a considerable amount ot' liquid 'which has been drawn into the cylinder 5, said displaced liquid passing out through the pipe l2 and thence out of the opening Il' in the nozzle 16. iir'hen the piston is again drawn outwardi the passage 15` is closed by he piston and the liquid in the pump cylinder 5 above the piston 'l is discharged through the pipe 4t2 as new liquid is drawn in behind the piston.

When the lire extinguisl'ier is hild in an uprightposition, as shown in Fig. 1 of the drawings, the cup-shaped

valve.c

36 and 37 slide by gravity to the position shown, thereby closing communication through the upp er suction pipe 27 and opening communication through the lower suction pipe 28. il?,

however, the tire extinguisher were to be inverted so that the liquid therein were te run te the opposite end of the casing, the

' held in and conseouentl the breek caused by such air pocket prevenis ihe liqnie being siphonecl out or otherwise escaping;

valves in the valve cylinder '26 Wonii e accordingly, Closing" eompmunieesien the upper pipe 28 and opening eo i i' `tion with the pipe27.

The Weights 29 ami 30 on the `free enls oi the iexible discharge pipes canse pipes to assume a lowermost posiion er, eli Jcimes in the casing', so that one on? sei@ will dip into the liquid at. all times, regerei less of the position in which the lire err-iingUiSheLiS'held.

0v account of the vpipe 43 being; disposed peripherally around the interior oi casing at each end ,thereo there will be en air pocket at some point in ihepioe,

regardless of what posiion "ehe devioe is through `the pipe 4:3.

Although but one specific emhoinien; of this invention is herein shown and deserihed, it will be nclersfcood that numerous emile of the construction shown may be eliererii omitted Without departing from ihe spi of this invention es dened by ehe foil@ claims.

i eleinml. An. apparatus of the close comprising e receptacle for @sich acting force pump monnieel mele, o valve casing mounted on l e Vflexible pip'e having ene end een@ ing Wih seid valve casing other enel freely movable `heele, en 'mieke pipe providing ooinmin tion between saisi valve seeing end one a of said pump, seid' pipe being loomed. o 'ametrically opposite Seial relire easing9 discharge nozzle :imi @pipe provifling of" muniesion between seiel nozzle other enel o1? Seidl pump7 seid pipen h dispose diametrieelly epposie .emol

casini?.

2. .nn apparatus oife'he comprising e reoepteole fior eylinclermonnte on seid reeee ensing'on said pump oylin pipe having one ehe, communil seid Valve easing, e releiively l rod in seid e/liner7 mounizeclh-on ihe iii-eer shoulders on said roel -i im ing o seid piston9 saicl rofl. giiuinally disposed elet therein lo that artvwhereon seid piston slides9 ,en exten mg pesi; one oi* Seidl shouieers,

piston rod,slot, and piston "being eoiisier'ne-