Improvements in Fluid-pressure Motive-power Engines.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Fluid-pressure Motive-power Engines.
I, PETER MACGREGOR WILSON, of Primrose Bank, Kilcreggan, in the County of
Dumbarton, Gentleman, do hereby declare the nature of this invention to be as
follows:-
This invention which relates to motive-power engines has for its object to sim-
plify and improve the construction and operation of such engines by substituting
for the ordinary crank placed at right angles to the cylinder and piston rod, means
whereby the reciprocatory movement of the piston or pistons and rods is converted
into rotatory motion applied to a main shaft placed lengthwise of the cylinder,
whereby a compact arrangement is obtained suitable especially for use in launches
and small screw steamers.
Under the invention I employ a cylinder with reciprocating piston operated by
steam, gas, or other fluid pressure in the ordinary way and on the end of the piston
rod I fit a pin or friction roller to enter a continuous helical groove or guide so
formed on the periphery of a drum that the to-and-fro movement of the piston rod
pin imparts continuous rotatory motion to the grooved drum, which latter is secured
on or forms part of the main shaft to be driven. Upon the drum is also formed a
cam groove or ridge which engages a pin or roller on the end of the valve rod, and
by the rotation of the drum imparts motion to the valve rod and valve such as
to control the admission and exhaust of the steam or other fluid for the cylinder.
A two cylinder or multiple cylinder engine operating either at high pressure or
under expansion may be arranged to actuate a single drum or two more drums in
like manner, a convenient arrangement being to place two cylinders side by side
and to carry the piston rods along opposite sides of the grooved drum with the
pins or rollers on the ends of the piston rods working in the same groove, the one
being at the outstroke whilst the other is at the instroke.
1
100
improvements in Fluid-pressure motive-power Engines.
I; PETER MACGREGOR WILSON, of Primrose Bank, Kilcreggan. in the County of
Dumbarton, Gentleman, do hereby declare the nature of this invention and in what
[Price 8d.]

page_text: manner the same is to be performed,, to be particularly described and ascertained
in and by the following statement:-
This invention which relates to motive-power engines has for its object to sim-
plify and improve the construction and operation of such engines by substituting
for the ordinary crank, placed at right angles to the cylinder and piston rod, means
whereby the reciprocating movement of the piston or pistons and rods is converted
into rotatory motion applied to a main. shaft placed lengthwise of the cylinder,
whereby a compact arrangement is obtained suitable especially for use in launches
and small screw steamers, steering gear, dynamos and the like.
The invention is illustrated by the accompanying drawings, Figure 1 being a
longitudinal elevation partly in section of the improved motive power engine,
Figure 2 a plan, and Figure 3 an end elevation of same. Figures 4 and 5 are
cross sections on the lines - and y-y respectively.
Under the invention I employ a cylinder A with reciprocating piston B operated
by steam, gas or other fluid pressure in the ordinary way and on the end of the
piston rod I fit a pin or friction roller D) to enter a continuous helical groove or
guide E so formed on the periphery of a drum E that the to-and-fro movement of
the piston rod pin D imparts continuous rotatory motion to the grooved drum E,
which latter is secured on or forms part of the main shaft F to be driven. Upon
the drum E there may also be formed a cam groove or ridge which engages a pin
or roller on the end of the valve rod G. and by the rotation of the drum imparts
motion to the valve rod G and valve H, or the valve rod G may as shewn have a
crank 1 at its outer end to which an eccentric, rod is secured, the eccentric rod
being actuated from the eccentric disc K on the driven shaft F. In either case
the motion of the valve H is such as to control the admission and exhaust of the
steam or other fluid for the cylinder A.
A two cylinder or multiple cylinder engine operating either at high pressure or
under expansion may be arranged to actuate a single drum or two or more drums
in like manner, a convenient arrangement being to place two cylinders side by
side and to carry the piston rods along opposite sides of the grooved drum with the
pins or rollers on the ends of the piston rods working in the same groove, the one
being at the outstroke whilst the other is at the instroke.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
1. A fluid-pressure motive power engine the parts of which are constructed, com-
bined and arranged to operate substantially as described.
2. A motive power engine having its cylinder or cylinders arranged in line with
the main shaft, said shaft having secured on it a drum formed with a continuous
helical groove or guide on its periphery engaged by a pin or roller on the piston
rod of the engine substantially as described..
1000
"
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents, 62, Saint Vincent Street, Glasgow,
Agent for the Applicant.