Improvements in Gas Motor Engines.
Year: 1889

page_text: Date of Application, 5th Mar., 1889
Complete Specification Left. 5th Dec., 1889-Accepted, 11th Jan., 1890
PROVISIONAL SPECIFICATION.
Improvements in Gas Motor Engines.
I HUGH WILLIAMS of the Mount Stockport in the County of Chester Civil
Engineer do hereby declare the nature of this Invention to be as follows:-
My improvements are particularly applicable to the type of engines known as the
Stockport" gas engines with cylinders arranged tandem at opposite sides of the
crank shaft but my improvements may be applied to other types of engines the chief
object of my improvements being to ensure the delivery of a full charge of explosive
mixture from the compression into the power cylinders.
In applying my improvements to a double acting engine of the Stockport type in
which the power cylinders are placed on opposite sides of the crank shaft with their
respective compression cylinders immediately below them I fit the ends of the two
power piston rods together and so form a crosshead through which the crank pin
passes. According to my present invention I form on the crosshead a projection
which carries a stud forming a crank pin for a connecting rod secured to the piston
of one of the compression cylinders (and this piston is adjustably connected to the
piston of the opposite compression cylinder so that the movements of both pistons
are simultaneous.
By driving the piston of one compression cylinder from a separate and independent
crank pin as above mentioned a longer stroke may be given to it than that of the
power piston so that after the power piston has completed its instroke the compres-
sion piston below it will still continue to move inward for a short distance the effect
of this is to drive a full charge of gas and air into the other power cylinder; during
the time this compression piston is forcing its charge into the power cylinder the
opposite compression cylinder is taking in a new charge.
In applying my invention to a single acting Stockport engine with one power and
one compression cylinder at opposite sides of the crank shaft I connect the crosshead
of the power piston direct to the crank and on this crosshead is a projection which
carries a crank pin to which the piston rod of the compression cylinder is
connected so that a longer stroke can, be given_to_the_compression than_to_the_power_
piston.
When applying my invention to other gas engines with the compression and power
cylinders placed at opposite sides of the crank or all on one side I obtain the increased
length of stroke of the compression piston or pistons from an additional crank pin as
described or by equivalent means.
Dated this 4th day of March 1889
COMPLETE SPECIFICATION.
Improvements in Gas Motor Engines.
I, HUGH WILLIAMS, of The Mount, Stockport, in the County of Chester, Civil
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 :-
My invention relates to improvements in gas motor engines and is particularly
applicable to double acting engines of the type known as the "Stockport" gas engines
for which Letters Patent in Great Britain No. 3066 and bearing date June 20,
1883 were granted to Charles Henry Andrew and in which the cylinders are

page_text: arranged tandem at opposite sides of the crankshaft the chief object of my improve-
ments being to ensure the delivery of full charges of explosive fluid mixture from the
compression or charging cylinders into the power cylinders.
I attain this object by the arrangement and combination of parts illustrated by the
accompanying two Sheets of Drawings in which-
Figure is a longitudinal vertical section of a double acting "Stockport" gas
engine fitted with my improvement. Fig. 2 is a plan of the same partly in section.
Fig. 3 is a sectional plan of the compression cylinders and their pistons. Fig. 4 is
a transverse vertical section taken through the middle of the engine.
Similar letters refer to similar parts throughout the several views.
The two power cylinders a a¹ are placed on opposite sides of the crankshaft on
which is mounted the driving pulley and the flywheel ².
The two power
pistons cc have the ends of their respective connecting rods d d fitted together to
form a crosshead through which the crank pin 3 passes.
Now according to my present improvements I cast with the end of the connecting
rod or otherwise form on the aforesaid crosshead a projection №² which carries a
stude which constitutes a crankpin for a connecting rod the other end of which is
secured by a pin y to the connecting rod and the piston of the compression or
charging cylinder j. The connecting rod ' of the piston of the other compression
cylinder is screwed into the end of the connecting rod and secured by nuts h²;
this mode of connection permits the adjustment of the relative positions of the two
pistons and also ensures their simultaneous movement.
The engine is provided with the usual ports passages valves and igniting arrange-
ments which may be of any of the ordinary well known constructions. The great
advantage obtained by driving the piston of the compression cylinder j from the
separate and independent crankpin e as above described is that a longer or later
stroke is given to it and also to the piston of the other compression cylinder j¹ than
that of their corresponding power pistons d d¹; consequently after each power piston
has completed its instroke the compression piston below it will still continue to move
inward for a short distance and the effect of this continued movement is to drive a
full charge of explosive fluid. mixture into the opposite power cylinder; during the
time this compression piston say for example the piston is forcing its charge from
the cylinder into the power cylinder a the opposite compression cylinder will be
drawing in a new charge of explosive fluid mixture as is well understood..
:
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
1. In a double acting gas motor engine of the type specified the combination
with the power cylinders their pistons and rods connected by a crosshead to the
crankshaft, of a separate and independent crankpin carried by a projection from said
crosshead, said crankpin being connected to and operating the respective pistons
of the compression cylinders substantially as herein set forth, for the purpose
specified.
2. The combination with the power cylinders a a¹ their pistons c c¹ rods d d¹ and
the crankshaft b, of the projection crankpin e carried by said projection, rod f
connecting said crankpin e to the rod and compression piston i, said rod h being
coupled adjustably to the rod ¹ of the compression piston all substantially as herein
shown and described, for the purpose specified.
Dated this 4th day of December 1889
H. B. BARLOW,
17, St. Ann's Square Manchester, Agent for Applicant.