Chemical Fire-Engine. Page: 2 of 3
[1], 2 p. : ill. ; 23 cm.View a full description of this patent.
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UNITED STATESPATENT OFFICE,
HENRY M. MINNIS, OF WYLIE, TEXAS, ASSIGNOR TO SAMUEL POTTS AND C. D. LOVE,
BOTH OF WYLIE, TEXAS.
CHEMICAL FIRE-ENGINE.
984,231. Specification of Letters Patent. Patented Feb. 14, 1911.
Application filed May 12, 1910. Serial No. 560,782.To all whom it may concern:
Be it known that I, HENRY M. MINNIs,
citizen of the United States, residing at
Wylie, in the county of Collin and State of
5 Texas, have invented certain new and use-
ful Improvements in Chemical Fire - En-
gines, of which the following is a specifi-
cation.
My invention relates to new and useful
10 improvements in fire extinguishers and more
particularly to chemical fire engines.
The object of my invention is to provide
a chemical fire engine which can be mounted
upon a portable frame and one which will
15 not necessitate the refilling of the tanks car-
rying the chemical after the initial charge
has been exhausted.
Another object of my invention is to pro-
vide a fire extinguisher having a tank for
20 carrying chemical and means for forcing
soda water into the tank and a pump ar-
ranged to introduce suitable acid into the
tank to charge the same.
Still another object of my invention is to
25 provide a chemical fire engine carrying a
tank similar to the usual carboy commonly
used on fire extinguishers of this class, but
one which can be made to regenerate with-
out closing the outlet to the tank or lower-
30 ing the pressure of the fluid that is passing
through the outlet.
Finally the object of the invention is to
provide means of the character described
that will be strong, durable, efficient, and
35 easy of operation, simple and comparatively
inexpensive to construct, and also in which
the several parts will not be likely to get
out of working order.
With the above and other objects in view,
40 the invention has relation to certain novel
features of construction and operation, an
example of which is described in this speci-
fication and illustrated in the accompanying
drawings, wherein:
45 Figure 1. is a side elevation of my device
mounted on the frame of a portable fire
pump, Fig. 2. is a plan view of the same,
Fig. 3. is a front elevation of my device
mounted on said frame, Fig. 4. is a vertical
50 section taken on the line S-D of Fig. 1
with the tank removed from the frame, Fig.
5. is a transverse section taken on the line
x-x of Fig. 2 showing a soda water hop-
per and a pump connection to the tank, andFig. 6. is a detail of the soda water pump 55
connections and valves.
In the drawings the numeral 1 designates
the frame of a portable fire pump on which
I have mounted a tank 2 near its forward
end. The tank 2 has an outlet 3 arranged 60
at its forward end from which a pipe 4 ex-
tends. From the other end of the tank a
pipe 5 extends outward to a vertical pipe 6
which has connection with a T-joint 7 con-
nected in a pipe 8 leading from a soda 65
water receptacle 9 to a cylinder 10. A check
valve 11 is arranged in the pipe S between
the T-joint 7 and the soda water receptacle
9 while a similar check valve 12 is included
in the pipe 6 between the T-joint 7 and the 70
pipe 5. A hand operated cut-off valve 41
is connected between the receptacle 9 and
the check valve 11 to regulate the flow be-
tween the pump and the receptacle. This
construction is best shown in Figs. 4 and 5. 75
A piston 14 is mounted in the cylinder 10
and arranged to be operated by a pitman 13
to be driven by any suitable power. Soda
water or similar fluid which is poured into
the receptacle 9 will be forced into the tank 80
2 under pressure, where it wil) be held by
the check valve 12.
Above the tank 2 at its forward end a re-
ceptacle 15 adapted to hold an acidulous
fluid such as sulfuric acid is mounted. From 85
the bottom of this receptacle a pipe 16 ex-
tends to a check valve 17 and thence to a.T-
joint 18. On the other side of the T-joint
the pipe 16 has connection with a. check
valve 19 and terminates in a downwardly 90
extending pipe 20 which enters the tank 2
and terminates near its bottom. The T-
joint 18 communicates with a rearwardly ex-
tending pipe 21 which terminates within a
cylinder 22 mounted on the frame 1. A 95
piston 23 arranged to operate within the cyl-
inder 22 has connection through a pitman 24
to a hand lever 25 also mounted on the
frame 1.
In the pipe 4 which extends from the for- 100
ward end of the tank 2, a T-joint 26 is in-
cluded and a pipe 27 having connection
therewith extends upward and connects with
a horizontal pipe 28 which communicates
with a safety valve 29 and pressure gage 30. 105
After connecting with the T-joint 26 the
pipe 4 communicates with a hand operated
cut-off valve 31 which is normally kept
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Minnis, Henry M. Chemical Fire-Engine., patent, February 14, 1911; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth512768/m1/2/: accessed June 19, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.