Improvements in Fluid Pressure Motors.
Year: 1891

page_text: Date of Application, 4th Sept., 1891
Complete Specification Left 4th July 4002
h July, 1802 Accepted, 3rd Doc., 1902
PROVISIONAL SPECIFICATION.
Improvements in Fluid Pressure Motors.
I, JOSEPH YATES of 304 Pimlico Road, London S.W. Engineer do hereby
declare the nature of this invention to be as follows:-
This invention relates to motors adapted to be worked by any fluid pressure, such
as steam, compressed air, or water under pressure. The apparatus consists of a
chest or box within which reciprocates in a curve a steam tight flat attached to a
rod or axle passing through the sides of box, and made tight by packing box. One
or both ends of the axle is connected to an arm or arms to which is connected the
connecting rod of the crank of the main driven shaft or instead of a connecting rod
arrangement, one of the arms may have a slot in it in which the working crank
engages. The inlet and exhaust ports are on each side of flat by side of the cross
axle. These ports are controlled by suitable slide valve working in a steam chest.
This valve is preferred to be round and is operated by a pivotted lever arrange-
ment to engage each end of valve actuated by a second arm on other end of cross
axle having a stud on it engaging the pivotted lever.
Dated this 4th day of September 1891.
FREDERIC PRINCE,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Fluid Pressure Motors.
I JOSEPH YATES of 30 Pimlico Road London S.W. Engineer, do hereby declare
the nature of this invention and in what manner the same is to be performed to
be particularly described and ascertained in and by the following statement :-
This invention relates to that class of motors capable of being worked by either
steam, compressed air, or water under pressure in which a flap piston is held at the
bottom and reciprocates in a curve and consists in an improved and simplified
arrangement of constructing such motors. To enable my invention to be fully
understood I will proceed to describe the same with aid of the accompanying
drawings.
Figure 1 illustrates a sectional side elevation of my improved motor.
Figure 2 a plan thereof.
Figure 3 a vertical transverse section on line x, y, Fig. 1.
Figure 4 outside elevation showing arrangement for operating slide valve.
Figure 5 horizontal section of slide valve and connection for actuating same.
A is the main casing answering to the cylinder of an engine; B, the piston
thereof, which in working has a to and fro movement in casing A. from its bottom
and is made steam tight with usual packing. This piston is keyed on to cross shaft C,
passing through casing A, and made steam tight by stuffing boxes D. Each end
of shaft C, has keyed to it lever arms E, and E, to which one end of the connecting
rod F, is attached by the cross arm G, the other end being secured in the usual way
to the crank of the main driven shaft. H, are the inlet and exhaust ports controlled
by the slide valve J, which is preferred to be cylindrical, working steam tight in a
tube K; this valve has inlet ports L, and exhaust port M: N, inlet for steain, and
O, exhaust. The slide valve is operated by the mechanism shown in the drawings
to enable a quick cut off to be effected: this is as follows: pivotted on to one side
of casing A, by a long bearing G. is a yoke part P, the bottom of which engages a
stud S, on a frame S₁, attached to slide valve by adjusting nuts S2. This part P,

page_text: is operated to work the slide valve as follows:-Attached to main shaft C, is a
double projecting cam R, the two tops of which alternatively engage the underside of
top of P, by the partial rotation of the shaft in working and so moving the slide
valve by a sudden movement.
30
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed; I declare that what I
claim is :-
1. A fluid pressure motor consisting of a casing A a flap piston arranged to
reciprocate therein in a curve from the bottom. attached to a cross axle having
outside arm or arms suitably connected by connecting rod to the crank of the driven
shaft and the slide valve arrangements, substantially as described and illustrated by
the accompanying drawings.
.
2. In a fluid pressure motor the arrangement for actuating the slide valve consist-
ing of the combination with the axle C of the pivotted part P stud S frame S¹ and
screw nuts S2 as described and illustrated by the accompanying drawings.
T 1
1
1003
FREDERIC PRINCE,
1, Quality Court, Chancery Lane, London, Agent for Applicant.