Rotary Engine. Page: 4 of 7
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UNITED STATES PATENT OFFICE.
JAMES C. WALKER, OF WACO, TEXAS.
ROTARY ENGINE.
SPECIFICATION forming part of Letters Patent No. 611,536, dated September 27, 1898.
Application filed December 27, 1897. Serial No. 663,784. (No model)To all wivoin Mt may concern:
Be it known that I, JAMES C. WALKER, re-
siding at Waco, in the county of McLennan
and State of Texas, have invented a new and
5 Improved Rotary Engine, of which the fol-
lowing is a specification.
This invention, which relates generally to
improvements on the form of engine disclosed
in my Patent No. 515,631, dated February 17,
10 1894, more particularly refers to an improved
means for operating the abutment-slides and
the inlet-valve devices disclosed in my co-
pending application filed December 27, 1897,
Serial No. 663,783.
i 5 This invention in its most essential features
differentiates from the construction in my
other application in the peculiar relation and
arrangement of the automatic adjustable cen-
trifugally-operated devices for operating the
20 connections for the sliding or throttled valve
of the steam-chest.
The invention consists in the peculiar ar-
rangement of parts, such as will be first de-
scribed in detail and then be specifically
25 pointed out in the appended claims, reference
being had to the accompanying drawings, in
which-
Figure 1 is a side elevation of my improved
engine, parts being shown in section. Fig.
30 2 is an enlarged vertical section taken on the
line 2 2 of Fig. 1. Fig. 3 is a transverse sec-
tion on the line 3 3 of Fig. 2. Fig. 4 is a de-
tail view of one set of the abutment-slide-op-
erating rock-frames. Figs. 5 and 6 are re-
35 spectively a top and inverted plan view of
the mechanism for operating the inlet-valve-
lever devices. Figs. 7, 8, and 9 are detail
views illustrating a modified construction of
abutment and valve operating devices. Fig.
to 10 is a detail view illustrating the shifting
valve for the steam-inlet and the exhaust and
inlet ports for the cylinder.
In its general structure this form of engine
comprises a nest of cylinders, preferably four,
45 arranged in two sets, designated by B B' and
B2 B3,which are formed in sections joined to-
gether, mounted upon suitable bases and pro-
vided with offtake devices at the lower end
for the escape of the products of the conden-
50 sations, the same as in my other application
referred to. In the present form the cylin-
ders each have an annular steam-chamberand a sliding abutment arranged at the up-
per end,which abutments of the several cyl-
inders are disposed in the same radial aline- 55
ment. The shaft is also provided with a num-
ber of concentric pistons, one for each cham-
ber, which pistons for each set of cylinders
are disposed at diametrically opposite points,
and, if desired, the arrangement of the pis- 60
tons in the two sets may be alike, so as to
take live steam in two cylinders at one time,
as shown, or they may be arranged alter-
nately, so that the shaft of the engine may
receive a live-steam force at each quarter of 65
its revolution.
In the present structure the operating-
disks which carry the cam devices for oper-
ating the abutment - slide valves are also
fixedly mounted on the shaft C between the 70
inner pair of cylinders. The disks, one of
which is employed for each set of cylinders,
consist of a solid body portion d, fixedly held
on the shaft C. (See Figs. 2 and 3.) This
body portion has three operating parts-a 75
middle circular section d5, which serves as a
guide, and reduced annular portions d6 and cP
on opposite sides,which terminate in diamet-
rically opposite projecting arrow-like heads
d64 and dF', the purpose of which will pres- 8o
ently appear.
c5 c' designate pendent levers guided in
suitable bearings, the upper ends of which
terminate in four portions c7 c8, which re-
spectively connect with the abutment-slide- 85
operating-lever devices, one set of which is
illustrated in detail in Fig. 4. Each set of
these devices comprises a shaft c, journaled
in suitable bearings, on which one end of the
rocker-arms c' c' and c2 c2 are loosely jour- 90
naled, their outer ends being pivotally se-
cured to the lift-arms c1 of the abutment-
slide frame c1 for the cylinder B2 and the arm
c14 of the frame c" for the abutment-slide for
the cylinder B3. 95
The lower ends of the pendent levers c5 cl
carry a crescent-shaped frame c, and such
lower ends and frame are also strongly braced
by the members d22, as shown in Fig. 2.
In each end of the frames diis journaled a xoo
friction-roller, which rollers operate against
the side of the guide-casing c, which is pro-
vided to keep the contact-piece c in proper
position and also to take up the stress of the
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Walker, James C. Rotary Engine., patent, September 27, 1898; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth511966/m1/4/: accessed July 2, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.