Improvements in Gas Engines.
Year: 1892

page_text: Date of Application, 20th Jan., 1892
Complete Specification Left, 29th Nov., 1892-Accepted, 31st Dec., 1892
Improvements in Gas Engines.
We, JOHN RICHARDSON, of the firin of Robey and Company, Globe Works,
Lincoln; Engineer, and WILLIAM NORRIS, of 20, Altham Terrace, Lincoln,
Engineer, both in the County of Lincoln, do hereby declare the nature of this
invention to be as follows:-
Our invention relates to improvements of the valve arrangement and valve
actuating details of gas engines and its object is to simplify these details.
In carrying our invention into effect, we arrange a gas engine with the usual
valve shaft rotating at half the speed of rotation of the engine, but we dispense
with the levers commonly used to actuate the valves. To accomplish this; we
arrange a valve casing carrying respectively the three necessary valves viz. the
gas valve, the gas and air inlet valve and the exhaust valve. All three valves
are in line, the spindles being so placed that rollers carried in their ends come into
contact with cams on the valve shaft. The said cams thus open and close the
valves at the desired times, acting directly on the spindle ends without the inter-
vention of levers. The governing may be effected by mounting a rotating
governor on the shaft and causing it to move the gas cam along the shaft to miss
the gas roller when the engine exceeds its standard speed.
Springs may be applied to force the valves to their seats or the valves may be
arranged separate from their actuating spindles and allowed to close by their
weight.
The spindles may be guided in any well known manner, but we prefer to guide
by flanges projecting from the rotating cams; the said flanges being arranged to
bear against the flat sides of the jaws carrying the rollers.
The valve casing carrying the three valves is preferably arranged above the
rotating shaft, and it is divided by suitable divisions so as to provide passages for
the admission of air and gas and the discharge of the exhaust gases:
It is very convenient to have the gas and air valves contiguous, and the exhaust
valve, at the outer end.
One cover bolted down, covers all valves, and on lifting this single cover the
valves can be at once withdrawn.
These arrangements may be modified without departing from an essential feature
of our invention, which consists in the arrangement of gas engine valves in such
manner that levers are dispensed with.
Dated this 28th day of January 1892.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Gas Engines.
We, JOHN RICHARDSON, of the firm of Robey and Company, Globe Works,
Lincoln, Engineer, and WILLIAM NORRIS, of 20 Altham Terrace, Lincoln,
Engineer, both in the County of Lincoln, 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 :-
Our invention relates to improvements of the valve arrangement and valve
actuating details of gas engines and its object is to simplify these details.

page_text: '
Referring to the accompanying sheet of drawings:-
Figure 1 is a transverse section through the cylinder of a gas engine embodying
our invention.
Figure 2 is a sectional plan.
Figure 3 is a longitudinal vertical section.
Figure 4 is a section through the gas and governing valves.
In carrying our invention into effect we arrange a gas engine with the usual
valve shaft L rotating at half the speed of rotation of the engine but we dispense
with the levers commonly used to actuate the valves. To accomplish this we
arrange a valve casing carrying respectively the three necessary valves viz.—the
gas valve G, the gas and air inlet valve C and the exhaust valve B. All three
valves are in line, the spindles b, c of the exhaust and inlet valves being so placed
that rollers carried in their ends, or as shown in Figures and 3 blocks M, N
carried on their ends, come into contact with cams on the valve shaft L. A cam O
Figure 3 is shown and it serves to open the exhaust valve B. The said cams
thus open and close the valves at the desired times, acting directly on the spindle
ends b, c without the intervention of levers. The governing may be effected by,
mounting a rotating governor on the shaft and causing it to move the gas cam
along the shaft to miss the gas roller when the engine exceeds its standard speed,
but we prefer in these small engines to govern by a device shown at Figure 4.
The valve H is the governing valve and G is the gas valve. The gas valve G is
automatic and admits gas from the passage K while air is admitted at I and
passes through H to E and thence by the air valve C to the cylinder. The
valve H is pushed open by a spring but when the engine runs too fast the
rush of gas and air mixture closes the valve H against its seat and so the charge
is reduced and the engine is governed. The pressure of the spring e¹ may be
adjusted to vary the speed and the lift of the valve may also be adjusted by the
screw d for the same purpose.
Springs may be applied to force the valves to their seats or the valves may be
arranged separate from their actuating spindles and allowed to close by their
weight.
The spindles may be guided in any well known manner but we prefer to guide
by flanges projecting from the rotating cams, the said flanges being arranged to
bear against the flat sides of the jaws carrying the rollers. The blocks M. N on
-the ends of the spindles b, c dispense with rollers and guides.
The valve casing carrying the three valves is preferably arranged above the
rotating shaft and it is divided by suitable divisions so as to provide passages for
the admission of air and gas and the discharge of the exhaust gases. It is very
convenient to have the gas and air valves contiguous and the exhaust valve at
the outer end.
.
The exhaust gases are discharged by the passage D while the inlet gases enter
by way of E.
One cover Q bolted down covers all valves and on lifting this single cover the
valves can be at once withdrawn. This cover Q also carries the igniter tube P.
A is the combustion space of the engine into which the gases are charged and
from which they discharge.
These arrangements may be modified without departing from an essential feature
of our invention which consists in the arrangement of gas engine valves in such
manner that levers are. dispensed with.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is: :-
:
1. A gas or like engine in which the valves are so mounted with reference to
the cam shaft that the cams operate on the valve spindles directly without the
intervention of levers, substantially as and for the purposes hereinbefore described.
2. A gas or like engine having the inlet and exhaust valves opening directly

page_text: into the same space closed by one cover, the said valves being operated directly
from the valve shaft substantially as and for the purposes hereinbefore described.
3. A gas or like engine with valves and passages arranged as hereinbefore
described with reference to Figures 1, 2 and 3 of the accompanying drawings.
Dated this 28th day of November 1892.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for the Applicants.