Valve Page: 3 of 3
[1], 2 p. : ill. ; 23 cm.View a full description of this patent.
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1,045,886
shift the position of the valves and conse-
quently change the course of the steam.
To those skilled in this art it will be ob-
vious without further illustration or de-
5 tailed description that when the opening 8
of one valve registers with the inlet port 5
at that end of the cylinder and live steam is
flowing from the valve chest into the cylin-
der to move the piston in one direction, the
10 groove 9 in the other valve will stand over
and connect the inlet port from the opposite
end of the cylinder with the exhaust port 6
so that the expanded steam at that side of
the piston can pass out of the cylinder. By
15 a well known principle the crank on the ec-
centric 10 will hold the slide 12 practically
stationary as it passes the dead center shown
in Fig. 1 and where the position of parts
will be as just above described, and to
20 lengthen this period I have made use of the
lost motion which occurs in the pin-and-
slot connection 18. As the crank passes the
dead center and the pivot 11 begins to move
the slide 12 at first slightly and then more
25 rapidly as the crank nears a position half
way to the other dead center, the slots in the
slide slip over the pins rising from the disks
17 so that the latter are not actuated at first..
Finally the far ends of the slots in the slide
30 will strike said pins rising from the disks 17
while the slide is moving quite rapidly,. and
each valve will be quickly shifted to its op-
posite position, after which the crank passes
around the extreme side of the eccentric and
35 the operation is repeated on its return. As
each valve is shifted, however, the round
hole or opening 8 prevents the admission of
any live steam to the inlet port until it reg-
isters with its extremity 5, and conversely
40 it cuts off the inlet when the valve begins
its movement in the opposite direction.
Meanwhile the arcuate groove 9 has had some
portion of its length in constant register
with the common outlet to the atmosphere,
45 and as soon as the turning of the valve has
completely cut off the inlet of steam through
the opening 8 that end of the groove 9 near-
est said opening moves over the extremity 5
of the inlet port 2 and the latter is thereby
50 thrown in communication with the common
outlet and becomes the outlet port for that
end of the cylinder. Thus it will be seen
that there is always live steam within the
steam chest pressing the valves against their
55 seats, and as the grooves 9 are in constant
communication with the common outlet to
the atmosphere there is no tendency what-
ever to lift a valve off its seat while it is ad-
mitting steam, and even when it is exhaust-
60 ing steam such tendency is thoroughly over-
come by the pressure of the live steam upon
the valve. It follows that this improvedvalve mechanism does not need packing, and
as the valves rest flat upon their seats they
will work for a. long time without leakage. 65
Nor do I need to hold them mechanically
thereupon, and hence I am enabled to form
the stems separate from the valves and jour-
nal them through the top of the steam chest,
so that when the latter is removed the stems 70
come off with it and the valves are exposed
for easy repair or substitution.
It will be readily seen from the foregoing
description, taken in connection with the ac-
companying drawings, that I have provided 75
a construction in which the parts will be -
very compactly arranged and in which the
size of the steam chest may be appreciably
reduced without any loss of efficiency of the
engine and the steam will, consequently, be 80
caused to flow more directly to the engine
cylinder instead of circulating within the
steam chest without accomplishing any re-
sults. As the steam will be more effectively
maintained at its working temperature less 85
fuel will be consumed in the furnace and the
engine will, consequently, be more economi-
cally operated. The operating parts by
which the valves are adjusted are located
outside of the steam chest and the number of 90
points where packing is necessary will be
thereby reduced so that there will be less
chance for the steam to escape and be lost
than is now the case.
Having thus described my invention, what, 95
I claim is:
In a device of the class described, a cylin-
der ; a piston operating therein; a steam
chest upon the cylinder; a valve disk ro-
tatable upon the cylinder within the steam 100
chest and provided in its outer face with a
polygonal recess; a cover for the chest, the
cover being provided with an opening; a
stem having a cylindrical portion rotatable
in the opening, the stem having at one end a 105
polygonal head registering removably in the
recess, and having at its other end, a polyg-
onal shank, located outside of the cover, the
cross sectional area of the shank being less
than the cross sectional area of the cylin- 110
drical portion; an operating disk mounted
upon the shank and resting against the out-
side of the cover and extending across the
periphery of the opening in the cover; a pin
projecting from the disk; and an operating 115
member having a slot in which the pin is re--
ceived for limited movement.
In testimony that I claim the foregoing as
my own, I have hereto affixed my signature
in the presence of two witnesses.
T. F. FAULKNER.
Witnesses:
C. E. MERCER,
W. E. SUIROW.Copies of this patent may be obtained for five cents each, by addressing the " Commissioner of Patents,
Washington, D. C."a
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Reference the current page of this Patent.
Faulkner, Thomas F. Valve, patent, November 26, 1912; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth512891/m1/3/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.