Improvements in Gas and Oil Motor Engines.
Year: 1892

page_text: Date of Application, 11th Oct., 1892
Complete Specification Left, 20th Dec., 1892-Accepted, 21st Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in Gas and Oil Motor Engines.
I JOSEPH SOUTHALL of Woodleigh Selborne Road in the City of 'Worcester,
Engineer, do hereby declare the nature of this invention to be as follows:-
Constructing gas and oil motor engines substantially as follows, the cylinder is
provided with a self acting suction valve for the admission of gas and air and the
exhaust port with a self acting non return valve opening outwards to atmosphere.
The compressed charge is ignited in the usual manner causing the piston to travel
outwards; when it has reached such a distance that the pressure in the cylinder
has fallen to the desired extent it uncovers an exhaust port through which lifting
the non return valve the exhaust gases pass to atmosphere. When all pressure in
the cylinder has escaped, the valve in the exhaust pipe closes again and the suction
of the piston which travels on some distance to complete its outstroke causes the
supply valve to lift admitting a fresh charge into the rear of the cylinder, the
supply valve and compression space being so designed that the incoming charge
shall gently occupy the space behind the burnt gases left in the cylinder as they
move forward following the course of the pistou, on the return stroke compression
commences causing the exhaust port valve to lift thus allowing the burnt gases
occupying the space between the piston and that port, to pass out of the cylinder
until such time as the piston has covered the port. By the remainder of its
instroke the piston compresses the working charge and the above cycle is
repeated.
Deted this 10th day of October 1892.
JOSEPH SOUTHALL.
COMPLETE SPECIFICATION.
Improvements in Gas and Oil Motor Engines.
I JOSEPH SOUTHALL of Woodleigh Selborne Road in the City of Worcester
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
Constructing gas and oil motor engines substantially as follows and as shewn in the
accompanying drawing which represents a sectional view of the cylinder of a gas
engine constructed to act according to the cycle forming my invention.
cycle is as follows:- the compressed charge is ignited in any known manner causing
the piston to commence its out power stroke, when it has travelled such a distance
that the pressure in the cylinder has fallen to the desired extent, the exhaust
passage is opened allowing the burnt gases to pass to atmosphere, all pressure in
the cylinder having thus escaped the exhaust passage is closed again and the
suction of the piston which is made to travel on some considerable distance to
complete its outstroke draws a fresh charge into the cylinder, this fresh charge
being introduced into the cylinder in such a manner that it shall mix as little as
possible with the burnt gases left in the cylinder, on the instroke commencing the
exhaust passage is opened for a sufficient period to allow the bulk of the burnt
gases present in the cylinder to be forced out to atmosphere, it is then closed again
and the piston by the remainder of its instroke compresses the gases remaining in
the cylinder to form the next working charge, and the above cycle is repeated.
The arrangement of valves, positions of ports and style of piston shewn in the
drawing whilst representing one way of carrying out my invention, are not essentiaļ

page_text: to enable the engine to operate according thereto, in the drawing, P is the piston
having a passage B through it terminating in a pipe, so as to direct the new
charge well to the rear of the cylinder. A is the exhaust passage and B the
supply port. The valve controlling passage A can be arranged so as to work
automatically as drawn, that is, so as to be lifted by the pressure of the burnt
gases when the piston uncovers that port, or it may be of the usual exhaust valve
type operated at the desired times from the crank shaft of the engine, the valve
operating for supply is of the ordinary suction valve type admitting air from C
and gas or oil vapour through E. If the supply valve is situated in the com-
pression space of the cylinder it is surmounted by a baffle plate to check the flow
of the incoming charge and in this case the piston is made of ordinary form.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare what I
claim is :-
.
Constructing gas engines so as to operate in the manner herein described and
made clear by the drawing.
Dated this 19th day of December 1892.
JOSEPH SOUTHALL.