Improvements in High-speed Engines.
Year: 1889

page_text: Date of Application, 5th Apr., 1889
Complete Specification Left, 6th Jan., 1890-Accepted, 8th Feb., 1890
PROVISIONAL SPECIFICATION.
Improvements in High-speed Engines.
I, ALFRED SNEATH of 15, Gough Street, Poplar, in the County of London,
Engineer, do hereby declare the nature of this invention to be as follows:-
.
My invention relates to 'an improved duplex engine adapted to run at a high
speed.
According to my invention the cylinders are mounted in the same axial line, and
the motion of the piston rods is communicated to the crank shaft by means of a slotted
link, to which the said piston rods are secured and in the slot of which the crank pin,
or a cylindrical sleeve or block thereon, slides as the crank shaft rotates.
The two cylinders may both be operated by high pressure steam or one with high
pressure and the other with low pressure.
In some cases I arrange two or more sets of cylinders to work in connection with
the same crank shaft; in such cases, however, I advantageously cause the cylinders
of each pair to work under the same steam pressure, and to exhaust from one pair to
the next and so on.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in High-speed Engines.
I, ALFRED SNEATH, of 15, Gough Street, Poplar, in the County of London
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 an improved duplex engine adapted to run at a high
speed.
:
According to my invention the cylinders are mounted in the same axial line, and
the motion of the piston rods is communicated to the crank shaft by means of a slotted
link, to which the said piston rods are secured and in the slot of which the crank pin,
or a cylindrical sleeve or block thereon slides as the crank shaft rotates.
To enable my invention to be fully understood I will describe the same with
reference to the accompanying drawing, in which―
Figure 1 is a plan of an engine constructed according to my invention.
Figure 2 is a sectional longitudinal section of the same; and
Figure 3 is an end view.
a is the bed plate of the engine, and b, b are the cylinders which, as herein before
stated, are in the same axial line. c, c are the piston rods which are both connected
with the slotted link d, and e is the crank-shaft, the pin f of the crank of which moves
in the slot of the said link, so that as reciprocating motion is imparted to the link
rotary motion will be imparted to the crank-shaft. g is a sleeve which is fitted upon
the crank-pin, and which serves to reduce the friction in the link as much as possible
and is readily replaced when worn.
The two cylinders may both be operated by high pressure steam or one with high
pressure and the other with low pressure.
In some cases I arrange two or more sets of cylinders to work in connection with
the same crank-shaft; in such cases, however, I advantageously cause the cylinders of
each pair to work under the same steam pressure, and to exhaust from one pair to the
next and so on.

page_text: 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 high speed engine the cylinders of which are placed in pairs, each pair being
adapted to operate upon a single crank without the employment of connecting rods,
substantially as described.
2. The manufacture and use of the improved engine herein before described and
illustrated in the accompanying drawing.
Dated the 6th day of January 1890.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London. Agents for the Applicant.