Rotary Engine. Page: 3 of 4
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UNITED
STATES
PATENT OFFICE.
WILLIAM FRANCIS JAMES, OF QUINTANA, TEXAS.
ROTARY ENGINE.
SPECIFICATION forming part of Letters Patent No. 634,755, dated October 10, 1899.
Application filed June 30, 1899. Serial Yo, 722,399. (No model).To all whom t may concern
Be it known that J, WILLIAM FRANCIS
JAMES, of Quintana, in the county of Bra-
zoria and State of Texas, have invented a new
5 and Improved Rotary Engine, of which the
following is a full, clear, and exact descrip-
tion.
My invention relates to an improvement in
rotary engines and comprises the novel fea-
[o tures hereinafter described and claimed.
Reference is to be had to the accompanying
drawings, forming a part of this specification,
in which similar characters of reference indi-
cate corresponding parts in all the figures.
15 Figure 1 is a cross-sectional elevation of my
engine. Fig. 2 is a detail sectional elevation
showing the valves in a different position.
Fig. 3 is a longitudinal sectional elevation on
the line 3 3 in Fig. 1, and Fig. 4 is a detail
20 section taken through the abutment.
My engine is of that class of rotary engines
having a cylindrical casing which has a ch am-
ber acting as the cylinder or steam-space and
a disk mounted upon a shaft and rotating
25 within said cylinder, the disk having a pro-
jecting piston thereon filling the steam-space
and the casing having a movable abutment
which drops down behind the piston and
closes the steam-space of the cylinder. The
30 casing is composed of the peripheral ring B
and the two heads A A, the peripheral ring
B having recesses formed therein, one of
which is adapted to receive the abutment
and the other of which acts as an exhaust-
35 chamber.
A disk C is mounted upon a shaft 02, which
is journaled in suitable bearings in the head-
plates A A The periphery of the disk C is
provided with a groove which receives the
40 abutment E, the edges of the flanges forming
the sides of this groove being caused to form
a steam-tight joint with the ring B by means
of packing-rings C'. The piston is clearly
shown in Figs. 1 and 2 and consists of a block
45 D, which is secured to the outer surface of
the disk C, so as to partly close the steam-
space, the block extending entirely across the
steam-space longitudinally of the shaft, but
stopping short of the outer edge of said steam-
50 space. The piston is completed by means of
the inclined plate D', which has one end rest-ing on top of the block D and secured thereto
by screws or other suitable means and its
other end, which tapers to an edge, resting
upon the periphery of the disk C. By reason 55
of this construction the depth of the piston
in a radial direction may be regulated by
placing packing-plates between the two parts
D and D'. The abutment E is pivoted at e
to the outer casing and swings upward to 6o
permit the piston to pass and then drops
downward until it is in contact with the outer
periphery of the disk C. This abutment has
an extension E', which projects from the outer
or swinging end, so as to engage the wall of 65
the recess containing the same, and thus to
prevent the abutment from swinging toward
the disk more than a certain distance. By
this means the pressure of the abutment may
be relieved from the disk and the contact- 70
surface of the abutment be held close against
the disk without causing appreciable pres-
sure thereon.
The abutment has a steam-portf extending
through the same and opening at the outer 75
or swinging end of the abutment in such a
position as to just clear the inner surface of
the ring B when the abutment is in its inner-
most position or in the position shown in
Fig. 1. 8o
1 Steam is admited to the recess which con-
tains the abutment by means of the ports I',
which extend through the plate covering said
recess, and the steam-pressure thus acts to
force the abutment inward. The side edges 85
of the abutment are made steam-tight by hav-
ing grooves formed therein, said grooves be-
ing of an L shape, as clearly shown in Fig.
2, and having packing-strips e' and e2 placed
within said grooves and engaging the sides 90
of the recess. These packing-strips may be
held outward against the side surfaces of the
recess by admitting steam to their under sur-
faces through a small hole f', which commu-
nicates with the steam-portf, as clearly shown 95
in Fig. 4. The jar which would otherwise
occur when the abutment seats itself upon
the piston-disk is obviated by means of a
dash-pot, which consists of a cylinder F, se-
cured to the under surface of the abutment ioa
and which enters a hole F', formed in the
casing. The cylinder is of such size as to
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James, William Francis. Rotary Engine., patent, October 10, 1899; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth512957/m1/3/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.