US936086A - Fire-extinguishing device. - Google Patents

Description

J. R. BROWN. FIRE EXTINGUISHING' DEVICE. APPLICATION FILED JAN. 22, 1909.

Patented Oct. 5, 1909.

-QMW 1O increased by the introduction into it of oer- 4 To all whom it may concern:

? N TE STATES i ATENT OFFICE;

JQEN a. snows. or VANGQUYER, BRITISH conmasm. omens.

rraE-Exrmenrsnmc marten.

Be it known tliatl, JOHN R. Brown, a

citizen of the Dominion of Canada, residing at Vancouver, in the Province of British Columbia, Canada, have invented a new and useful FireeExtinguishing Device, of which -d'esigned.

The inventlon is particularly described In the following is a specification;

v This invention relates toa means whereby the extinguishing-properties of a stream of ater from a hydrant or fire engine may be tain chemical or chemicals and of provision .whereby the energy of the stream is increased by the generation of gas from the combination of such chemicals. 1

The invention may be applied either as a permanent addition to a hydrant or fire en.- ginebut preferably as a detached apparatus which may be used in combination therewith when the urgency of the requirement may justify the additional expense of its use.

Fires are numerous which to bring-immediatelyunder control an expense would be justified far in excess of what the operation of this device would involve either because the fire had assumed a dominating ascends ency. or where even a small fire tends to spread among valuable merchandise: it is to meet such a, requirement that the invention which is the subject of this application is the following specification, reference being made to the drawings by which it is accompanied, in which, i

Figure 1 is a vertical longitudinal section showing the application of my invention to a stream of water from a fire engine or hys drant Fig. 2 a cross-section at AA in Fig. 1 and Fig. 3 a cross section at B B in the same figure.

In this drawing Zrepresents a connection to which the hose from a hydrant or fire sage 6, which is oflarger diameter than 2, is a hopper or receptacle 4 which may be c engine may beattachedand 3 a p pe connec;

tion at the other end to which the delivery hose to the nozzle may be connected. Between these pipes there is a free passage to which the various hemical connect-ions are.

rngde in a manner to be described.-

Adjacent to 2 and surmounting the pass charged with carbonate of soda-or other dry chemical which either alone or in combina; tion with otherchemicals'are known to have flame reducing properties. In the lower Specflication of Letters Patent.

. Anrlicatio l d 413. 5 18W finial. Na 47316341 atented on a 1.909.

partgf this receptacle 4 and between it and the passage '5 connecting it with the water ing flutes or elongated pockets 8;which as the member 7 is rotated will carry the soda or ether dry chemical. from the hopperand stream of water passing through 6. This manner: in the drawing it is shown as done by gear wheels by means of the handle 10.

z The delivery end of 6 conically converges at 11 to a pipe 12 which is approximately of the same diameter as 2, the end of which pipe 19 is contracted slightly at 13 where it delivetsinto'a converging cone-14, forming the forward end of 'a cylindrical mixing chamber 15 into which is delivered through a check'val vefflti, acid or other liquid chem ical from a aperposed tank 17. Between the upper partvofi this tank 17., and the upper part 0 the'm'ixjng chamben 1'5 is a passage 18 provide 'iffnecessary with a stopor valve 18, the object of which passage is to equal ize the pressflre between 17 and 15 that the acidmay fiotnhfreely from the upper tank 17 to the chamber 15.

The amount of acid which flows throu h the check valve 16 may be regulated y means of a hand wheel 2.1 from the outside of the tank.

Boththe m'ixing'chamber 15 and the acid tank 17 may be" furnished with pressure gages 22 that the pressure of the carbonic acid gas generated by the admixture of anwith a closable aperture 23 of ample size The converging nozzle 14: forms the entrance to a pipe 24 the diameter of which is Slightly larger than the original pipe 2 and into this pipe 24 a second acid delivery from the tank 17 may be made by a connection 25 in which isa closable check valve 16 for the cry connection 25 should enter the pipe 2stat a, forwardly directed angle so that the fiow'lof the water past its orifice may induce rather than check the flow ofthe acid from the tank. a

v From the converging come 11 to the lower part of the mixing chamber 15 is a passage 25 provided with a check valve 27 opening forward into mixing chamber the object will deliver it in measured quantities into the member 7 may be; rotated in any approvedthrough which it may be charged.

v ofwhich passage is to permit a portion of delinery pipe 6 is a rotatable member 7 havacid with an alkaline solution may be ascertamed. The acid tank 17 is also. provided regnlation'of the acid flow. This acid delivthe water with its dissolved soda to pass from 6 into the mixing tank and to pre vent the generated pressure passing back.

readily followed: The water as it is delivered from the hydrant or engine through the connection 2 will receive as it passes through 6 under the hopper .4, measured quantities of soda or other chemical bythe rotationof the member 7. A portion or" the solution of soda and water will pass through the passage 26 into the mixing chamber 15, where it will receive a regulated supply of acid through the valve 16. The acid will combine with the alkaline solution and will generate carbonic acid gas at a considerable "pressure. This water charged with carbonic acid gas under pressure will be delivered violently through the combining cone 14 where it will take up and mix with the Water and soda solution delivered through the The restriction 13 at the end of this pipe will tend to increase the velocity of the discharge through it and will lessen the chance of the increased pressure generated in let forcing the water back through 12. From the mixing chamber 15 the carbonated water is delivered in. pulsations which enables the check valve 27 opening atintervals between the pulsations to furnish a supply of soda water to the mixing chamber. During the accelerated forward 'fiow through 14: a further regulated amount of acid is furnished through'the pipe 25 which will satisfy the requirements of the soda in solution but .which if added in the mixing chamber-m ght cause an excess of back pressure that would impede the flow through 26.

Thereafter the stream of water charged with carbonic acid gas will be delivered from 3 to the hose pipe 30 for discharge onto the fire. The device may form a permanent attachment to a. fire engine but will preferably be separately mounted on wheels to accompany such and be used in connection therewith ,or with a hydrant'as required,

Itshould be connected as close as possible to the engine or hydrant, as under such conditions, while the water is passing through;

the hose. pipe under pressure, opportunity is afiorded itto absorb the carbonic acid gas and becomemore thoroughly carbonated before projection on the fire.

The essential feature of the invention lies not only in the admixture with a flowing stream of water of such chemicals as will increase lts fire extinguishing properties, but 1n the provision of a mixmg chamber so constructed that carbonic acid gas may be generated in it and the pressure of such gas will WVith this arrangement the advantages of a chemical engine, the efiiciency of which as a fire extinguisher is now fully recognized but the use of which for considerable c'onflagra- -tions is limited by the excessive size which would be required, is added to a stream ofwater from anordinary hydrant or fire engine,

The expense of the chemicals will undoubtedly. hinder'the general use of the device, but in view of the fact that it is purposed only as a supplementary addition which may-or may not be used, to a water extinguishing means will overcome any objection on this account which may be raised.

Having now particularly described my invention and the manner ofits use, I hereby declare that what I claim as new and desire to be protected in by Letters Patent is:

l. in a fire extinguishing device, a waterpass, casing surrounding a part of said waterpass and in communication therewith at one end, apassage of reduced diameter between said water-pass and the other end oflsaid casing, means vfor admitting a dry chemical to the water as itfiows through said pass in advance of said casing, and means foradmitting a fluid chemical into said casing; v

2. In a fire extinguishing device, a water- )ass a 08.5111 SLIII'OUIIdIII .a art ofsaid i water-pass and in communication there-with at one end, a passage of reduced diameter between said Water-pass and the other end of said casing, chemical to the water as'it flows throng said pass in advance of. said casing, means for admit-ting a fluid chemical into said casing, and means for admitting a fluid chemmeans for admitting aid'r ica] into the water as it flows through said I water-pass near the exit end ofsaid pass.

pass consisting of a tube having an enlarged In a fire extinguishing device, a waterentrant end and a reduced exit end, another tube projected into the-enlargement of said first mentioned tube through the enlarged end thereofand terminating adjacent to the reduced portionof said enlarged'ended tube,

means for admitting a dry chemical into saidother tube, and means for admitting a said first mentionedtube; H

4. In a fire extinguishing device, the comfluid chemical into the enlarged portion of binat'ion with a pip'e'through' which Water:

is constrained. to pass, of means of delivering .an-alkali thereint-o froma-su erposedhopper, a conical deliveryfrom't e wate rpipe into a pipe of less. diameter having a restricted outlet, a mixing'chamber surrounding this restricted ipe which chamber is provided with a conical delivery toward the restricted opening of the inner pipe, means for passing a proportion of the alkali water converging outlet from the pipe terminating 1n a pipe of less diameter, a mixing chamber surrounding this restricted pipe, a passage from the water pipe into the at'terend of the mixing chamber said passage closable with a checkval-ve opei'iing into the mixing chamber, an acid tank surn'iounting the mixing chamber, a controllable passage from the acid tank into the mixing chan'iber, said passage being closable with a check valve that will permit the fiow ot the acid outward but will prevent back movement into the acid tank, a conical delivery from the mixing chamber termina ting approximately with the termination of its inner pipe, and

means for delivering acid through a controllable passage into the delivery pipe.

(3. In a tire extinguishing device, a waterpass consisting of a tube having an enlarged (llll'ollt end and a reduced exit end, another tube projected into the enlargement of said first mentioned tube through the enlarged end tl'icrcof and terminating adjacent to the reduced portion of said enlarged ended tubc. means for admitting a dry chemical into said other.tube, means for admitting a iiuid chemical into. the enlarged portion of said first mentiom-dtube, and means for admitting a fiuid chemical into the reduced portion of said first mentioned tube.

7. in a tire cxtinguishing device, a waterpass consisting of a tube having an enlarged cnll'allt cud and a reduced exit end, another tube projcctcl into the enlargement of said first mcntioncd tube through the enlarged cnd llu-rcol'. and tcrminating adja ent to the reduced porlion ol' said enlarged cndcd -lubc. moans l'or admitting a dry chemical fluid chemical into the enlarged portion of said first mentloned tube,and means for admitting a flu-id chemical into the reduced portion of said first mentioned tube and a bypass between said enlarged end of said first mentioned tube and said other tube.

8. In afire extinguishing device, a water-. pass formed of a tubular member having a reduced portion and an enlarged portion, a pipe projecting through said enlarged portion and terminating adjacent tothe reduced portion of said tube, means for connecting said pipe with a source of water supply,

means for admitting a .dry'chemical to said pipe near its entrantv end, and means for adjmitting a fluid chemical into said tube.

: 9. In a fire extinguishing device, a watcrinto said other tube, means for admitting a I pass formed of atubular member having a a reduced portion and an enlarged portion, a pipe'projectmg through said enlarged por-.

. tion, and terminating adjacent to the reduced portion of said tube, means for connecting said pipe with a source of water supply, means for admitting a dry chemical to said pipe n ear i ts ent ant end, and means for admitting a fluid chemical into said tube, at the enlarged end thereof and also through the reduced end thereof.

10. In a fire extinguishing device, a waterpass formed of a tubular member having a reduced portion and an enlarged portion, a pipe projecting through said enlarged portion, and terminating adjacent to the reduced portion of said tube, means for connecting said. pipe with a source of water supply, means for admitting a dry chemical to said pipe near its entrant end, means for admitting a fluid chemical into said tube, and a valved by-pass between said pipe and the enlarged end of said tube.

in testimony whereof I have signed my name to this specification in the prcscncc of

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