Improvements in Fluid Pressure Engines.
Year: 1891

page_text: Date of Application, 22nd May, 1891
Complete Specification Left, 22nd Feb., 1892-Accepted, 26th Mar., 892
PROVISIONAL SPECIFICATION.
Improvements in Fluid Pressure Engines.
We, EDWARD DAVIES of Cambridge Cottage, Wood Green, Middlesex,
Engineer and JOHN HENRY FUGE of Selwyn College Cambridge, Gentleman
do hereby declare the nature of this invention to be as follows:-
The engine is primarily intended to be worked by water under pressure, but may
also be worked by compressed air or steam.
According to this invention the motive power is only intended to act upon one
side of the piston. The top of the cylinder is not open as is usual where the power
only acts upon the underside of piston, but is closed by a cover fitted with a
suitable gland or guide through which the piston rod passes. This gland or guide
takes the place of cross head and slide. The connecting rod is attached to the top
of piston rod in usual way and also to the crank of driving shaft. The side valve
may either work on the side or across the bottom of cylinder, one movement of the
valve admitting the motive power, and the second movement allowing it to exhaust.
The movements of the valve is effected by eccentric, cam motions operating suitably
arranged levers connected to the valve to give the valve a quick action both for the
inlet and exhaust. The valve may be contained in a usual chest, or may act like
the valve of a gas engine. The piston is preferred to be formed of a leather cup
supported upon or connected with a metal disc or rings attached to the piston rod.
Dated this 22nd day of May 1891.
FREDERIC PRINCE,
Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements in Fluid Pressure Engines.
We EDWARD DAVIES, of Cambridge Cottage, Wood Green, Middlesex,
Engineer, and JOHN HENRY FUGE, of Selwyn College, Cambridge, Gentleman,
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:-
Engines according to this invention are primarily intended for small power
purposes only, and to be worked by water under pressure; but may also be worked
by compressed air or steam..
According to this invention the motive power is only intended to act upon one
side of the piston. The top of the cylinder preferred to be closed by a cover
fitted with a gland guide, through which the piston rod passes. This guide takes
the place of cross-head and slide. The connecting rod is attached to top of piston
rod in the usual way, and also to the crank of driven shaft. The slide valve may
either work, on the side, or across the bottom of cylinder one movement of the
valve admitting the motive power, and the second movement allowing the exhaust.
The movement of the valve is effected by eccentric, but cam-motions operating
suitably arranged levers connected to the valve to give a quick action both for the
inlet and exhaust may be employed. The valve may be contained in the usual
chest, or may act like the valve of a gas engine. Where the power used is water,
the piston is preferred to be formed of a leather cup supported upon or connected
with a metal disc or rings or cup, attached to the piston-rod.
To enable our invention to be properly understood, we will proceed to describe
the same with aid of the accompanying drawings.

page_text: DESCRIPTION OF THE DRAWINGS.
Figure 1 elevation of engine complete.
Figure 2 sectional view of cylinder and slide valve.
Figure 3 cross section through valve chest and underside of cylinder.
Figure face of slide valve bed.
i
Figure 5 partial sectional view of cylinder and round form of slide-valve.
Figure 6 outside view of Figure 5.
A, the stand of usual construction, B, the cylinder, C, piston rod; D, connecting
rod. Instead of the use of a cross-head the piston rod passes through a guide C
attached to the top of cylinder; E, slide valve rod connected to eccentric in the
usual way, jointed to the slide valve rod F. G, the slide valve chest; H, inlet for
water ; I, outlet chest to which is attached a carrying off pipe I; J, slide valve;
J', slide valve bed; K, L, ports for inlet and exhaust. In Figures 5 and 6, the
slide valve N is made of a rounded form like a tap plug, with two straight runs Ó, P,
the inlet being at H', through D, and the outlet when the valve is moved round
through P, and out at Q. This valve is operated by an arm R, from an eccentric
by the rod F.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
A fluid pressure engine constructed substantially as herein before described and
illustrated by the accompanying drawings.
Dated this 22nd day of February 1892.
FREDERIC PRINCE,
1, Quality Court, Chancery Lane, London, Agent for Applicants.