US1289360A - Fire-extinguisher. - Google Patents

Description

F. C. BARGAH.

FIRE EXTINGUISHtR,

APPLICATION FILED APR. 12, 191/ lutvntcd Dec.

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FREDERICK l3. BARGAR, 0F COLUMBUS, OHIO, ASSIGNOR TO THE NU EI? FIRE APPLIANEE COMPANY, OF COLUMBUS, OHIO, A'CORIlORATIQN OF OHIO.

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Specificatlonof Letters Patent.

.latenicd 31,191 Si application filed April 12, 1917. Serial No.-l61,419.

\ fication.

This invention relates to fire extinguishers and is particularly directed to the improve ment of that type of extinguisher employing an expelling fluid under pressure to force the extinguishing chemical from its contain-er.

The main object of my invention resides in the combination of a chemical container and a. pressure medium container, the latter fluid under pressure and the two containers being so related that this expelling fluid is released liy the mere inversion of the ex-' tinguisher as a. whole. By the inversion of the extinguisher, the expelling fluid is released to become eil'eetive directly upon the chemiial extinguisher and in this manner.

the latter is forced out of its container.

A further oh ect' of my invention resides in the pressure container itself which [8 so constructed and arranged to prevent the" leakage. of the pressure medium itself after the same-has been placed therein under pressure. In this connection. my improved pressure tank is formed of an inner and outer receptacle arranged one within the other, together with a sealing medium l.orated within the outer receptacle above the level of the lower open portion of the inner receptacle, so that when pressure is intro.- duccd. this sealing liquid is forced into the space hctween the two receptacles. In this arrangement I also preferably locate the inlet and outlet valve structures in such position that they are normally scaled by sealing liquid.

'lo eliectuallv seal the expelling fluid such as air against escape. l have constructed the inner receptacle of glass. it being recon} nized that metal is not totally impervious to air or gas.

provided with an open bottom. the lower edge oi which is located liclow the level of am the top of the sealing liquid so that pressure medium when confined. is in contact with the glass and liquid sealing mediums only.

As stated, this receptacle is In order to at all times determine the. pressure within 'the pressure tank I have also provided a gauge member which communicates with the gas or air pressure medium hy means oi the ailing liquid, the gageheing in coininunication with the space formed hctween the inner and outer receptacles. f

Other objects of my invention will become more apparent after a detailed description of the accompanying sheet of drawings, in which similar characters of reference designate corresponding pants. and in which:

Figure 1 is a vertical sectional view of m v improved type otcxtinguisher shown in its normal or closed position. i

Fig. 2 is a llllllili' section showing theeintinguisher]iuvertcd'to release the expelling fluid. I

Fig. 3 isa transverse section taken on line lie-El of l ig". ,l.

Fig. 4 is a vertical"section through sented by line 4--4 of Fig. 2. and,

-Fig. 5 is a view in detail showing the auxiliary valve arrangement for closing the inlet pipe. H

'lhe extiiiguishiiw chemical container is represented by the reference numeral 1. this container being of any preferred ,type of a nor- .tion of the outlet valve structure repreconstruction, hut being provided with a cap closure 2, and an outlet fitting 3. to which the hose 4 is attached. This cap closure is threaded into position as is shown at 5 and is provided with an ad liti nal shoulder i .to which the pressure tank 7 as a whole is secured. Thispressure tank comprises an outer shcll R threaded into the shoulder (3, as is shown. Within this shell 3 there is located an open hottoni cylindrical glass receptacle 9 provided with a series oi shamidcrs 10 at its lower end to space its lower edge slightly from the liottoi'n, wall of theouter shell. This glass rccei'ltacle is also of a size slightly smaller than the internal iii-- ametcr ol' the shell 8 so that -i space 11 is formed entirely around the same. Within the outer receptacle there is also located a sealing: liquid 12 which may lie of anydesired nature. it heingf sutlicient to say that this scaling liquid is of a form to freely sealin rovic ed with a valve seat 16 an or gas into the pressure tank 7 and this forces the sealing liquid through the space 11 entirely surrounding the lass receptacle. The quantit of sealin liquid used is such that its leve is above t e lower edge of the glass receptacle after pressure has been introduced and when in'the position shown in Fig. 1. In this manner, the pressure medium is in contact with the glass and sealing medium only and in this manner its seepage or leakage is prevented. To determine the pressure within the tank, I have provided a gage 13, which gage communicates with the sealing li uid by a threaded connection 14 throughvt e top of the cap closure and into thespace formed between the outer shell and the inner receptacle 9.

In order to introduce the pressure medium, I have provided an inlet pipe 15 passing through .the top of the ca closure and into. the bottom of the outer shell 8 beneath the liquid. The top of the 15 iS y means of the cap 17 carrying the needle valve stem 18. At its other end, this pipe-15 is provided with the ordinary t pe of check valve 19, urged toward its seat y means of the spring 20. Thus, in introducing air 01'- gas', the cap 17 is removed andthe incoming gas operates against the tension of the spring 20. After sufiicient pressure has been introduced, this eheck valve is forced toward its seat by both the spring 20 and the action of the pressure against the sealing liquid 12? To additionally safeguard against the esca of the pressure medium, I have provided t e needle valve 18 carried by the cap 17.

I have so arranged the structure that, in order to permit the escape of the extinguishing chemical, all that is necessary is to invert the extinguisher as a whole. .The outlet valve is normally located beneath the sealing liquid and is designated by the numeral 21. This valve operates upon .the seat. 22 and is I attached .to the stem 23. A pair of arms 24 are formed on the lower end ofthe fitting 25 in which the valve seat is formed, and to these arms there are pivotally secured a pair of weighted levers 26. These weighted levers are arranged to cross each other and to pass through the looped portion 27 on the lower end of the'valve stem 23; The distance of the pivot point of these levers and their weight, has been so proportioned that when the extinguisher is inverted, the valve 21 is moved from its seat to open position against the internal pressure of the pressure tank. Inversion of the extinguisher causes the sealing liquid 12 to flow to the opposite end of the pressure tank and thus brings the expelling air or gas into direct contact with the outflow or escape valve. This saves the expelling liquid from being lost and also permits the escape of the expelling gas to act direetly upon the extinguishing chemical to is'closed force it out of its container 7. It will be understood that this pressure tank is so proportioned that for a given pressure, the vol ume contained therein is suflicient to expel the entire volume of extinguishing chemical within the container 7.

v From the foregoing description, it will be apparent that I have provided "an extinguisher of considerable utility. and one wherein the extinguishing properties ofthe chemical are-in nowiseafl'ected since there is no chemical action between theex lling medium and this extinguishing liqui when the two are brought into engagement. The entire extinguishing chemical 1S forced out of the container due to the pressure within the pressure tank 7 and normally, escape of this pressure is impossible because the pres:

a sure medium is in contact only withits glass receptacle and the sealing liquid 12 covering the release. valve structure. In addition,

there is-nobreaking' strain upon the glass receptacle, inasmuch as the p ure is equal on both sides Bythe use of the sealing liquid, the dual advantage of sealing the valve mechanism and also preventing corrosion of, theouter' receptacle is obtained. 7 In addition to this, the sealing liquid may also beutilized w operate directly upon the gage 13 to at all times give a visual indication of the internal pressure. The weighted portions 28 of the levers-26 are preferably of a fiat disk form tapered to a knife edge around their periphery to permit their ready fall through the extinguishing chemical when the extinguisher is inverted. It will also be noted that the entire pres sure tank 7 is removable by removing the cap closure 2. To rech tigc the pressure tank, it

is not 'necessar to remove this cap, but should it be desired to ascertain the appearance of the inside of the pressure-tank, all that is necessary is to remove the cap closure and then to remove the outer shell 8 from its threaded connection with the shoulder 6.

\Vhat I claim, is: 7

1.'A fire extinguishercomprising an extinguishing chemical container, a pressure medium cont-alner normally filled with an expelling fluid under pressure within said first named container, and means wheneby said pressure medium is released to become effective to expel said chemical upon inversion of said chemical container. 7 2 A fi're extinguisher comprising an extinguishing chemical .containcr, a pressure medium container normally filled with an expelling fluid under pressure, and means whereby said pressure medium is released to become effective to expel said chemical upon inversion'of said chemical container.

3. A fire extinguisher comprising an extinguishing chemical container, a pressure medium container normally filled with a compressible expe ing fluid under pressure,

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communicating means normally closed be tween said two containers, and, a sealing liquid within said pressure container normally covering said communicating means, said means being opened and moved the other end of its container by inversion of the extinguisher as a whole.

4. A lire extinguisher comprising an eiitinguishin chemical container, a pressure medium container formed of an outer shell Within which is located an open bottom glass receptacle, the latter being smaller than the former, a sealing liquid in the bottom of said shell above the level of the botton'iof said glas rrreptm'de, and means for permittingr the escape of the expelling fluid out of said receptacle to become ellective on said clu-vminnl.

A lire extinguishercomprising an etinguishing chemical container, a pressure medium container formed of an outer shell withinwhicii is located an open bottom glass receptacle, the letter being smaller than the former, a sealing liquid in the bottom of said shell above the level of the bottom of said glass receptacle, and means for permitting the-escape oi? the expellingfluid out of said receptacle to become effective on said chemical by the inversion of the extinguisher as a whole.

(3. A. lire extinguisher comprising an extinguishing chemical container, at ressure medium container located Within sair chemical container and formed ofan outer shell within which is located an open bottom glass receptacle, valve mechanism in the bottom of said outer shell for admitting and releasing the pressure fluid, and a sealing liquid the bottom of said shell above the level of the bottom of said glass receptacle and normally sealing said valve mechanism.

'5. A tire extinguisher comprising an extinguishing chemical container, a pressure medium container located within said chemical container and formed of an outer shell within which. is located an open bottom glass recei'itacle, valve mechanism in the bottom of said outer shell foradmitting and releasing the pressure fluid, and a sealing liquid in the bottom of said shell above the level of the bottom of said glass receptacle said release valve mechanism being auton'iaticallv ell'ective to release the pressure fluid upon inversion of said chemical container.

8. in a lire extinguisher, the combination with a rhenucal container, of a pressure tank comprising an outer shell, an open bottom glass receptacle smaller than and located 'uiiain said shell, a sealing liquid within said shell above said. liquid 3 v c in a fire extinguisher, the combination 3 Within said shel, a

the level of the open bottom 0 of sazd'receptacle and forced into the space between said receptacle and shell, and an clutlet valve located in the bottom of said iell'.

with a chemical container, of a pressure tank comprising an outer shell, on open bottom glass receptacle smaller than and located I sealing liquid within said shell above the level of the open bottom of said. receptacle and forced into the, space between said receptacle and shell, an outlet valve located in the bottom of said shell, said pressure tank being located Within said chemical container, and a Weighted lever structure for opening said outlet valve against the internal pressure Within said tank upon inversion of said chemical container.

10. A fire extinguisher comprising an extinguishing chemical container, a cap closure therefor, a pressure medium container carried by and removable from within said first named container by removal of said cap, and a valve mechanism carried by said 35 pressure tank operable to release the pressure therein by inversion of the extinguisher as a Whole.

11. In a fire extinguisher, the combination with a chemical container, of a pressure tank con'iprising an outer shell, an open bottom glass receptacle smaller than and located Within said shell, .a pressure indicating means in con'nminication with the space formed between said shell and said receptacle, and a sealing liquid within said shell above the level of the open bottom of said receptacle and forced into the space between said receptacle and shell, and outlet valve mechenism located in the bottom of said shell and normally sealed by said liquid.

12. A lire extinguisher comprising an extinguishing chemical container, a pressure medium container formed of an outer shell within which is located an open bottom receptacle, the'latter being smaller than the former, a sealing liquidin the bottom of said shell above the level of the bottom of said receptacle, and 'n-ieans-for pern'iittingpthe escape oi the expellingiiuid out of said receptacle to become effective on said chemical. in testin'ionywhereof I allix my signature in presence of two witnesses. p

i F. C. BARGAR. 3

Witnesses:

VVAI/rsn l). L. Born, A. L. PHnnr's.

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