Improvements in Slide Valves for Power Motors.
Year: 1894

page_text: Date of Application, 5th Nov., 1894
Complete Specification Left. 28th Jan. 1895 Accented 23rd Mar
1895
PROVISIONAL SPECIFICATION.
Improvements in Slide Valves for Power Motors. .
JOHN ANDERSON Pottery Lane Newcastle-on-Tyne Engineer do hereby declare
the nature of this invention to be as follows:-
This invention relates particularly to valves for controlling the pressure to
engine cylinders and consists of a cylindrical chamber communicating direct to the
power cylinder, and surrounded by the pressure and exhaust spaces, each of which
has a passage into the said chamber, and the slide valve in shape of a ring fitting
closely inside the chamber and of sufficient width to cover both the pressure and
exhaust perts, so that a movement of the ring either way will admit or eject the
pressure. Thus the external pressure upon the closed valve is equal all round, and
consequently no friction in moving. These valves can be fitted in the cylinder
cover or in other positions, and the motion controlled in any approved manner.
Dated this 3rd day of November 1894.
JOHN ANDERSON.
Improvements in Slide Valves for Power Motors.
JOHN ANDERSON Pottery Lane Newcastle-on-Tyne 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 :-
This invention relates particularly to valves for controlling the pressure in
engine cylinders and consists of a cylindrical chamber communicating direct to the
cylinder and piston. Said chamber is surrounded by the pressure and exhaust
spaces with ports, and the valve in form of a ring fitting closely inside and of
sufficient width to cover both the pressure and exhaust ports so that a movement
either way will admit or eject the pressure.
I will now explain my said invention more in detail reference being had to the
letters and figures upon the accompanying drawings.
Fig. 1. is a section of the cylinder cover containing the valve and steam
chest.
Fig. 1. is a plan of the valve.
Fig. III. is a section of steam chest and valves as applicable to the side of
cylinders for replacing the common slide valve.
A. represent a cylinder. B piston. K cylinder cover. D. steam space.
E. exhaust space. F, valve spindle. C. the valve raised and admiting steam to
the cylinder and at the same time covering the exhaust port while the other end of
the cylinder being similarly fitted, the valve C. being reversed so that the steam
port is closed and exhaust open. This valve is perfectly ballanced, the pressure
being equal all round both out and inside, and therefore not influenced by the
pressure.
Fig. 11. shows how the valve can be adjusted to compensate for wear, one side
being open and a wedge G. inserted and also kept by bolt H. from undue expansion,

page_text: the valves in each end of the cylinder being connected by a rod outside and
operated by link motion. Fig. III shows the two valves in one steam chest and
connected by lever J. which may be operated in the usual way.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1st. The valve as placed in the cylinder end or cover, and adjustable as in
Figs. I and II.
•
2nd. As aplicable to common cylinders as in Fig. III.
3rd. As trottle and governor valves for controlling any kind of pressure,
substantially as shown and for the purpose set forth, or any mere modification
thereof.
Dated 1.
T.
1002
JOHN ANDERSON.