Automatic Gas Control for Gas Water-Heaters. Page: 3 of 3
[1], 2 p. : ill. ; 23 cm.View a full description of this patent.
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never close the water passage. The plunger
rod 11 can travel only far enough to allow
the gas valve to be opened and closed. The
controller 3 moves freely through the guide
5 6, and as there is no water tight joint be-
tween the controller 3 and the guide 6, water
in small quantities can pass from one-side of
the guide 6 to the other and equalize the
pressure on each side of the guide :6 when.
10 the cock 2 is closed. The stem or plunger
rod 4 is operated by water pressure because
it has a greater surface and a less surface to
receive water pressure. The pressure sur-
face being so much greater on the controller
15 3 than on the surface 16 of plunger 7, the
controller 3 will be instantly moved when
the pressure against the outer end of the con-
troller is relieved by opening cock 2. When
the -cock 2 is closed and the water pressure on
20 each end of the controler 3 becomes equal-
ized, the stem 4 will be moved to close the gas
valve because the pressure on the outer end
of the plunger is little more than atmos-
pheric pressure and the pressure on the sur-
25 face 16 by the water is much greater than
the atmospheric pressure.
What I claim is:-
1. In an automatic control of the character
specified, in combination, a casing provided
30 with an inlet and an outlet, a relatively
short restricted passageway between said in-
let and outlet to permit access of fluid from
said inlet to said outlet at all times, a con-
troller mounted for movement through said
35 passageway anid accessible to fluid in said in-
let and-outlet portions, said controller beingprovided with grooves extending from the
inlet toward the outlet end thereof and
terminating short of the outlet end, walls of
said grooves comprising a fluid pressure area 40
on the side of the plug of differential cross-
sectional area so that when water is flowing
through said passageWay the controller tends
- to move to a balanced position, and means
operatable: by movement of said controller 45
for the purpose specified.
. 2. In a device of the character described
in combination, a casing provided with an
inlet chamber and an outlet chamber, a wall
separating said chambers and having - an 50
opening therein, the construction of said'
wall being such as to afford continuous com-
munication foi fluid between said chambers,
a- controller plug extending through said
opening and of a greater length than said 55
opening, said:controller plug being provided
with grooves extending from the inlet end
toward-the outlet end thereof and terminat-
ing short of the outlet end, walls of said
grooves comprising a- dynamic flow pressure 60
area on the -side- of the plug of differential
cross-sectional- area so- that -when water is
flowing through said opening the plug tends
to move a balanced, position, and operating
connections attached- to said controller plug. 65
In testimony whereof I set my hand, in
the presence- of two witnesses, this 11th day
of February, 1915.
PAUL H. HAMILTON.
Witnesses:
A. L. JACKSON,
J. W. Snrr.Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,
Washington, D. C."1,317,785
2
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Hamilton, Paul H. Automatic Gas Control for Gas Water-Heaters., patent, October 7, 1919; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1258072/m1/3/: accessed June 19, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.