US1324572A - Assigjtog so the j - Google Patents

Description

J. A. THOMAS FIRE FIGHTING APPARATUS. APPLICATION mm SEPT. 24. 1917.

Patented Dec. 9, 1919.

' i e srarus PATENT err ron.

JOHN a. mamas, or communes, onro, assienor. re rnn J. A. rnorms comrm, or

' COLUMBUS, OHIO, A 00 BPORATION OF OHIO.

. FlIBE-FIGHTING' APP-fihATUS.

Specification of Letters Patent.

Application filed September 24, 191?. Serial No. 192,910.

To all whom it may concern:

Be it lmown that I, JOHN A. THOMAS a citizen of the United States, residing at l'umbus,

in the county of Franklin and State of Ohio, have invented certain new and use- 1 Improvements in Fire-Fighting Apparatus, of which the following is a s ecification.

This invention relates to fire ghting apparatus and has particular reference to that type of a paratus employing a chemicahzed stream or extinguishing a fire. Spe cifically, my invention is an im rovement over the structure claimed in my atent No. 1,152,452, issued September 7, 1915.

In the resent invention, 1 have aimed to arrange the parts in. a more compact form, in order that considerable less space will be utilized in mounting the same upon a mobile truck.

The present invention also has for its object, the introduction of water i nto the mixa ing chamber from a point on the discharge side of the pump,

'thlS being accomplished by means of a valved conduit, the chamber end ofthe conduit being provided with an ejecting nozzle having a plurality pf opposed jets, one of WlllClI e ects the fluid mto the underlying chamber and the other jet extends upwardly, whereby the liquid forced out of the upper jet will revolve a conveyer, to discharge a suitable quantity of a powdered chemical into said chamber.

A further object is to provide the mixing chamber with automatically operating mechanism so situated that when the chamber becomes filled to a predetermined level, the mechanism will be operated to shut oi the supply of fluid to said chamber.

A still further object is to provide apparatus of this character wherein the mechanism employed is of a purely automatic character, reliable in operation and not likely to become out of order.

The preferred embodiment of my inventionis shown in the accompanying sheet of drawing, in which similar characters of reference describe cor-responding parts, and in which:

Figure 1 is a central vertical section shown somewhat diagrammatically of the pump and the mixing chamber in their proper relation.

Fig. 2 is a horizontal sectional view, taken along the line 22 of Pi 1.

eferring more particularly to the draw mg, the pump A comprises a casing '1 having a purality of inlet therewith and dispose in any desired manner. The casing is so formed interiorly that a passageway 3 is provided therein leading from the inlet pipes 2, said passageway being connected y an opening 3 with the rotor chamber of the pump and situated within said chamber are two rotor members- 5. These rotor members are mounted upon shafts 6 and one of them is driven in any desired manner and from any source of power,

Patented Dec. 9, 1919. n

.p11 as 2 communicating v the rotors thus intermeshing so that one drives the other. The wall 7 in connection with which these rotors o crate, are of a size and shape to closely t the projecting teeth of the rotor, so that pockets 8 are formed in which the water is forced around said rotors and ejected through the discharge opening 9. At this point, the discharge connecting element 10 is attached,

said element being utilized to convey the water to a hose or any other element of use.

Directly above the discharge point 9, there is provided a by-pass pipe 11, in the form of a valved conduit and in which is interposed a hand controlled valve 12 and a float actuated valve 13. This conduitleads and discharges its contents into'the chemical mixture container 14:, by providing the container end of the conduit with an ejecting nozzle 15, said nozzle being provided with vertically opposed jets 16 and 17. Thus it will be seen that when the pump is in a state of operation, a fluid will be forcedthrough the conduit 11, when the valves 12 and 13 are open, and discharged by means of the nozzle 15 into the container 14.

In order to feed a chemical such as sodium bicarbonate in proper proportions to the container, use is made of which the conduit 11 extends, and secured to the u per end of the casing is the lower funnel s aped discharge end 19 of a chemical containing hopper 20. The end 19 of the hopper has rotatably mounted therein, a screw conveyor 21, which has a shaft 22 thereof extended to receive a spiral 23, the latter being located within a housing 24 rig idly mounted within the casing 18. Thus it will be evident that the fluid discharged from the jet 16 will strike against the spiral 23 and will thereby cause the rotation of the shaft 22 and its associate feed conveyer 21, so that a suitable quantity of chemical contained Within the hopper 20 will be automatically introduced into the contalner 14. A damper door 25 is rotatably mounted within the discharge end of the screw conveyer housing and is provided with openings adapted to register with similar openings formed in the webbed extremity 26 of said discharge end 19, whereby upon rotating the damper member 25, the extent of said openings may be readily adjusted to govern the flow of the chemical therethrough.

Water ejected from the nozzle end 17 s forced into the container 14, whence it is mixed with the chemical from the hopper 20, and when the chemicalized fluid within the container reaches a pre-determined level, the flow of fluid thereto is automatically cut off. This is accomplished through the provision of the valve 13 in the conduit 11 which has the stem 27 thereof provided with an operating link 28, to the end of which is suitably secured a ballmember 29, said stem operating through an opening 30 provided in the top 31 of the container 14, the ball member 29 being thus positioned within the container. Thus when the fluid arises to a point near" the top 31, the stem 37 will be elevated by the ball member 29, so that the internal mechanism (not shown) of the valve 13 will be actuated to obstruct the flow of fluid through said conduit, as will be clearly understood.

Leading from the lower end of the container 14 1s a lower valved conduit 32, which is provided with a manually operated valve 33 and with a check valve 34, the latter permitting fluid to flow but one way through the conduit 32. The end of said conduit terminates Within a casing 35 and leading from said casing is a discharge nozzle 36, which projects into the pump casing and terminates within the opening 3, whereby the contents of the container 14 will be discharged in a position, to be caught by the rotors 5 and thoroughly mixed with the outgoing fluid. Formed in the casing 35 is a nozzle element 38 which communicates with the pi e 39 extending from the conduit 11 and W ich has a valve 40 provided therein. It will be seen that fluid will be discharged under considerable pressure from the ejecting element 38, into the nozzle 36 and this action will create a suction so as to facilitate the flow of fluid from the container 14 to the nozzle 36.

From the foregoing apparent that I have provided a type of fire fighting a paratus wherein the proper proportions etween the chemical and 'water description, it will be ment 38, which a device wherein the objects of the the advantageous lating valve in one t eatre have been automatically secured, and in an apparatus wherein the several parts thereof are automatically controlled. in operation, when the rotors 5 are in'a state of rotation, water will be drawn from the inlet pipes through the pump and discharged into the connection 10 and into the conduit 11.

Water passing through the conduit 11 is discharged into the container 14 but simultaneous with this discharge the feed conveyer 21 is operated so that a chemical containe within the hopper 20 will be introduced into the fluid located within the container 14, means being provided in conjunction with the container to shut off the flow of fluid through the conduit when the water within the container 14 reaches a predetermined level. The flow of chemicalized fluid from the container is perfectly accomplished by suction, the same being effected through the provision of the pipe 39 and the ejecting elecreates a suction within the casing structure 35 so as to effectively withdraw the fluid from the container 14 and to eject it under pressure into the pump structure.

It will thus be seen that there is provided present been achieved and that all features above mentioned are, among others, present. The apparatus is extremely simple in construction, easy to operate, of few and simple parts and not likely to become out of order. By reason of the automatic features of the apparatus, the same will require practically no attention and will necessitate but a minimum of adjustments.

Having described the invention, what is claimed as new and patentable is:

1. In a fire fighting apparatus, the combination with a-force pump and a mixture container, of a conduit leading fromthe discharge side of said pump into said container, a second conduit leading from the bottom of said container to said pump, a regulating valve in said first mentioned conduit, means connected with said valve and situated within said container, whereby when the fluid within said container reaches a pre-determined level, the flow of fluid through the conduit will be prevented.

2. In a fire fighting apparatus, the combination with a source of water supply and a mixture container, of a conduit leading from said source into said container, a second conduit leading from the bottom of said invention have container back to said water source, a reguof said conduits, and a branch conduit communicating with said former, conduits and provided with means operable to create a suction within said second conduit to facilitate the flow of fluid, from said container to said source. 3. In a fire fighting apparatus, the combination with a force .pum and a im'xture first named conduit and disposed to rotate 10 container, of a conduit eading from the said conveyer upon the flow of fluid through discharge, side of said pump into said 0on said conduit.-

tainer, a second conduit leading from the In testimony whereof I aflix mysignature a chemical containing hopper communicatbottom of said container back to said pump, 1n presence of two witnesses.

. JOHN A. THOMAS. ing with said container, a conveyer situated Witnesses:

within the discharge end of said hopper, and WALTER E. L. Boon, a nozzle carried by the container end of said Anvm G. SUNDERs.

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