Steam Engine Page: 4 of 5
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UNITED STATES PATENT OFFICE.
PETER S. RUSH, OF ATLANTA, TEXAS.
STEAM- ENGINE.
SPECIFICATION forming part of Letters Patent No. 368,974, dated August 30, 1887.
Application flied November 2, 1886. Serial No. 217,789. (No model.)To all whom it may concern:
Be it known that I, PETER S. R s, of At-
lanta, in the count y of Cass and State of Texas,
have invented a new and Improved Steam-
5 Engine, of which the following is a full, clear,
and exact description.
The object of my invention is to provide a
new and improved steam-engine in which a
dead-center position is obviated and the press-
to ure of the live steam is completely and very
advantageously utilized.
The invention consists in the construction
and arrangement of various parts and details
and combinations of the same, as will be fully
15 described hereinafter, and then pointed out in
the claims.
Reference is to be had to the accompanying
drawings, forming a part of this specification,
in which similar letters of reference indicate
20 corresponding parts in all the figures.
Figure 1 is a vertical section of my improve-
ment. Fig. 2 is a plan view of the same. Fig.
3 is a plan view of the cylinders with the steam-
chest in section. Fig. 4 is a vertical cross-sec-
25 tion of thesame on the line x x of Fig. 3. Fig.
5 is asectional bottom view of one of the valves,
and Fig. 6 is a vertical cross-section of the
same on the line y y of Fig. 5.
On the frame A, of suitable construction, are
30 mounted, at its rear end, the three cylinders
B, C, and D, placed alongside of each other
and each provided with a piston, E, E', and E2,
respectively. These pistons E, E', and El are
connected by the usual means with the main
35 shaft F of the engine.
Above the middle cylinder, C, is located a
steam-chest, G, which supplies the three cyl-
inders with live steam by means of the two ro-
tary valves H and I, which are alike in con-
40 struction and operate together by means of a
train of gear-wheels which is set in motion by
the revolving shaft J, having two crank-arms,
K and K', connected by the rods L and L', re-
spectively, with the rocking beams 3M and M',
45 each independently mounted on the shaft M',
held in standards held on the main frame A.
Thesaid rocking beams M and M'are connected
by the usual eccentric-rods with the eccentrics
N and N', secured to the main shaft F.
50 The rotary valve H operates over the ports
b, c, and d, leading from the steam-chest G tothe outer ends of the respective cylinders B,
C, and D, and the rotary valve I operates over
the ports b', c', and d', leading from the steam-
chest G to the inner ends of the respective cyl- 55
inders B, C, and D. The exhaust-port eis con-
nected by means of the branch pipes e' and e"
with the central openings in the hubs of the
valves H and I.
Each of the rotary valves H and I is fitted so 60
that its hub O will rotate on a projection on
the steam-chest G, and is provided with a cham-
ber, P, formed between the semicircular flanged
rim Q, the top plate, R, and the flanged side
walls, S S. The exhaust branch pipes e' and 65
e" are always in communication with the said
chamber P. A part of the hub O of the re-
spective valves H and I, cutaway on the inside
of said chamber, is shown in Fig. 3.
The valves H and I operate simultaneously, 70
but rotate in opposite directions at the same
speed, so that when the ports b, c, and d are
alternately closed and exhaust, then the ports
b', c', and d' are alternately opened, and when
the piston E in the cylinder B travels forward, 75
as shown in Figs. 1 and 2, then the piston E"
in the cylinder D is on its return-stroke, while
the piston E' in the central cylinder, C, is in
the middle position between the two pistons of
the outer cylinders, B and D, so that at no time 8o
can a dead-center position of the three pistons
take place simultaneously in relation to the
main shaft F.
The crank-arms K and K' stand at right an-
gles to each other, so that the rocking motion 85
imparted to the rocking beams M and M' from
their respective eccentrics N and N' on the
main shaft causes the shaft J to rotate con-
tinuously.
The respective ends of the three cylinders 90
take steam whenever the respective port is un-
covered by the said valves H and I, and the
exhaust takes place when one of the ports is
in communication with the chamber P of the
valve, so that the steam from the said port 95
passes to the hub O and into the respective
branch pipe leading into the exhaust-port e.
Having thus fully described my invention, I
claim as new and desire to secure by Letters
Patent-- loo
1. In a steam - engine, three cylinders ar-
ranged alongside of each other, and a piston
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Rush, Peter S. Steam Engine, patent, August 30, 1887; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth171617/m1/4/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.