Improvements in Valves and Valve Gear of Explosion Engines.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Valves and Valve Gear of Explosion Engines.
I, ALFRED EDWARD CREESE, of 58, Myddelton Street, Rosebery Avenue, in the
County of London, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to improvements in explosion engines and comprises
the novel arrangement of admission and exhaust valves hereinafter described.
It is found in practice that explosion engine valves wear rapidly thus causing
Floss of time and labour employed in repairing them.
Now it is the object of this invention to obviate this disadvantage and to this
end I arrange the admission and exhaust valves at the top or at one end of the
cylinder, the valve-rods projecting through the ends of the valve and exhaust
chambers respectively and being normally closed by spiral springs in the ordinary
manner. The outer end of euch valve-rod is provided with a disc.
In the case of the exhaust valve this is operated in the ordinary manner by a
lever actuated from the crank-shaft of the engine in any suitable manner and
having an arm which periodically strikes the disc upon the end of the valve-rod
so as to depress the valve. This arm is, however, so arranged that it strikes the
dise out of-centre, the result being that the said disc, and with it the valve-rod
and valve, is turned thus gradually revolving the valve with respect to its seat
and ensuring that it is not worn at any particular point in the periphery thereof.
The admission or inlet valve, which is opened by suction, is also rotated slightly
each time it is opened by the movement of the end of the spring as it is
compressed.
Ball bearings can be provided to reduce friction.

page_text: in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:—
This invention relates to improvements in explosion engines and comprises
the novel arrangement of admission and exhaust valves hereinafter described.
It is found in practice that explosion engine valves wear rapidly thus causing
loss of time and labour employed in repairing them.
Now it is the object of this invention to obviate this disadvantage and to this
end I arrange the admission and exhaust valves at the top or at one end of the
cylinder, the valve-rods projecting through the ends of the valve and exhaust
chambers respectively and being normally closed by spiral springs in the ordinary
manner. The outer end of each valve-rod is provided with a disc.
In the case of the exhaust valve this is operated in the ordinary manner by a
lever actuated from the crank-shaft of the engine in any suitable manner and
having an arm which periodically strikes the disc upon the end of the valve-rod
so as to depress the valve. This arm is, however, so arranged that it strikes the
disc out of centre, the result being that the said disc, and with it the valve-rod
and valve, is turned thus gradually revolving the valve with respect to its seat
and ensuring that it is not worn at any particular point in the periphery thereof.
The admission or inlet valve, which is opened by suction, is also rotated slightly
each time it is opened by the movement of the end of the spring as it is
compressed.
Ball bearings can be provided to reduce friction.
Figure 1 is a sectional elevation showing the end of a cylinder fitted with
valve mechanism constructed according to the invention:
Figure 2 is a plan thereof.
In the accompanying drawing,-
a is the cylinder of the engine, b is the air inlet valve and 6 the rod thereof,
e is the exhaust valve and c¹ the rod thereof. Each of the rods and extends
through the ends of the air inlet chamber d and the exhaust chamber e respec-
tively and are normally held against their seats f; g by the spiral springs h, h.
The springs bear at their lower ends upon discs i mounted upon anti-friction
balls which are held in races formed upon the underside of the discs and upon
the upper sides of discs supported upon the guide bosses upon the upper
ends of the chambers f and g. are pieces of packing arranged between the
discs and the bosses to form an insulating layer to prevent heat passing to
the springs.
The upper ends of the springs h also bear against discs j, the upper faces of
which bear against anti-friction balls placed between them and discs ¹ secured
to the upper ends of the valve rods and e¹.
The exhaust valve c is operated by the lever which is pivoted at ¹ to an
arm secured to the cylinder a of the engine and is adapted to be operated by
the rod arranged to be reciprocated in any suitable manner from the engine
mechanism and which strikes the outer end of the said pivoted lever k. The
inner end of the lever is provided with an adjustable screw pink which is
adapted when the lever is operated by the reciprocating rod 3 to strike the
outer end of the valve rod e eccentrically, as will be clearly seen from Figure 2,
thereby turning the said rod slightly upon its disc j. With this arrangement
the exhaust valve is gradually turned with respect to its seat so that it is not
worn at any particular point in the periphery thereof.
The admission or inlet valve, which is opened by suction in the usual manner,
is slightly turned each time it is opened by the compression of its spring / the
end of which turns when the spring is compressed axially.
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:-
1. In explosion engines the arrangement whereby the valves are automatically

page_text: gradually turned with respect to their seats, substantially as, and for the purpose
herein before described.
2. The improved admission and exhaust valves for explosion engines con-
structed substantially as herein before described and illustrated in the accom-
panying drawing.
1
2 T 1
1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.