Improvements in Hydraulic Engines for Driving Capstans or other Machinery.
Year: 1888

page_text: Late of Application, 22nd May, 1888
Complete Specification Left, 13th Feb., 1889
Complete Specification Accepted, 16th Mar.. 1889
PROVISIONAL SPECIFICATION.
Improvements in Hydraulic Engines for Driving Capstans or other
Machinery.
We, THOMAS GALLON Engineer's Office, Leith Docks in the County of Midlothian,
N.B. Hydraulic Engineer, and JOSEPH CHAPMAN 9, London Row, North Leith, in the
County of Midlothian N.B. Mechanical Engineer, do hereby declare the nature of
this invention to be as follows:-
Our Invention, consists of two or more Double Acting Oscillating Cylinders, with
Pistons & Rams, attached to a single or double crank shaft by a Ball and socket joint.
Each cylinder is joined to an oscillating Block which works on a fixed pin, the valve
chest being attached to the opposite side. The water ways run through the oscillating
Block, clear of the pin. The rod for working the slide valve is linked to a fixed pin,
the motion of the cylinder gives motion to the slide valve, which works exactly as if
governed by an eccentric.
The main supply and exhaust pipes join the valve chest and oscillating Block
respectively, without working joints.
The foot starting valve, when used for Capstans closes autonatically, when the foot is
taken off the lever, and stops the engine.
Dated this 18th day of May 1888.
THOMAS GALLON.
JOSEPH CHAPMAN.

page_text: COMPLETE SPECIFICATION.
Improvements in Hydraulic Engines for Driving Capstans or other
Machinery.
We THOMAS GALLON Engineer's Office Leith Docks, in the County of Midlothian
N.B. Hydraulic Engineer, and JOSEPH CHAPMAN, 9 London Row North Leith, in the
County of Midlothian N.B. Mechanical 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 -
In order that our Invention may be clearly understood, and its mode of working we
append Drawings which shew the manner in which the apparatus is bolted to a cast
iron plate, marked A on the Drawings; this plate forming the cover of a cast iron
foundation box, and applied to drive a Capstan B.
The cylinders, which are double acting and oscillating are marked C, being in this
case set at right angles, to accomodate a single crank D. They may however be set
to suit a double crank, or in other positions.
Figure I, of the Drawings represents an elevation Figure 2 a part of the plan, and
Figure, 3 an end view on the valve chest, only one cylinder with its appendages is
shewn, and the description here to be given, is as for one but common to each cylinder.
The cylinder, of cast iron or steel, lined with brass, has an ordinary stuffing box, and
gland. The area of the piston rod E, joined to the crank in the usual way, is exactly
half the area of the brass piston F, whilst working, there is constant pressure on the
half area part. The piston packed by a number of greased hemp rings, or otherwise,
and properly secured.
The oscillating Block H is formed to have the cylinder end bolted to it, as also the
valve face of special metal sweated and pinned to it. The pressure port I and exhaust
port K are through it, and there is a hole through it, to take the wrot iron, or steel
stud pin on which it oscillates. The stud pin is fixed to a boss on the plate A.
The valve chest, containing the valve rod M, and the slide valve P is bolted to the
oscillating block. The pressure pipe R conveys the fluid under pressure through a
coupling to the valve chest, and the constant pressure through a coupling to the
cylinder at the gland end, clear of the stroke of the piston.
The slide valve rod M, is linked to a fixed stud on the plate A by the swinging
link O, holding the valve. The to and fro motion of the valve face against the
slide by the oscillating block, opens and closes the valve ports exactly as required.
The pressure pipe S, and the exhaust pipe, if required, may be of a spiral form
to spring to the oscillation, where there is room for them, or they may be jointed.
The starting valve, and foot gear, not shewn, are as commonly used.
The valve arrangement answers for single acting rams atttached to cranks, or a
single cylinder, as shewn, will act with a fly wheel. There is not reversing gear
shewn on the drawings, it not being needed for a Capstan.
It is applicable if required.

page_text: Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed, we declare that what
we claim is :-
1. The oscillating block, with its ports, pivot hole, and connections, as herein-
before described.
2. The position of the swinging link, as vibrating in the same angular direction
as the valve rod end to which it is attached.
3. The arrangement and combination of the various parts, above mentioned for
the purposes, and substantially as herein described, and set forth and illustrated in
the Drawings hereto annexed."