Improvements in the Means and Apparatus for Governing Gas and Petroleum Engines.
Year: 1890

page_text: Date of Application, 17th Mar., 1890
Complete Specification Left, 16th Dec., 1890-Accepted, 17th Jan., 1891
PROVISIONAL SPECIFICATION.
[Communicated from abroad by THE GAS MOTOREM FABRIK DEUTZ, of Köln-
Deutz, in the Empire of Germany.]
Improvements in the Means and Apparatus for Governing Gas
and Petroleum Engines.
T, CHARLES DENTON ABEL of No. 28 Southampton Buildings, Chancery Lane in
the County of London, Consulting Engineer and Patent Agent, do hereby declare
the nature of this invention to be as follows:-
This invention relates to that construction of gas and petroleum motor engines in
which the admission of the combustible gas or liquid into the cylinder is effected by
means of a valve controlled by an inertia governor with "hit and miss" device, that
is to say, in which when the engine runs too fast, a reciprocating rod acted upon by
a weight, and which ordinarily pushes against a notch or projection on the gas valve
lever so as to open the gas valve, is moved by the inertia of the weight so as to miss
the valve lever and thus cause the valve to remain closed.
According to the present invention I combine with the valve or valve-lever a catch
or stop which acts upon the discharge valve of the engine, or upon the gear thereof,
in such a manner as to hold the discharge valve open during the time when the gas
or oil admission valve is not acted upon by the reciprocating rod, so that during the
ensuing strokes of the piston the products of combustion, together with air, are
alternately expolled and drawn into the cylinder again, instead of only drawing in
and expelling air, whereby the unnecessary cooling down of the cylinder during the
time that the engine is running without power is prevented.
In applying the above described invention to a vertical gas motor engine having a
vertically reciprocating gas slide, at the side of the casing of which is the gas
admission slide, a horizontally sliding block carrying the pivotted hit-and-miss rod
with weighted arm is moved to and fro by the rod of the gas slide and has opposite
it the notched end of a sliding rod, whose other end is connected by a bell crank
lever to the rod of the gas valve. This rod is continued upward to one end of a
horizontal double ended lever pivotted to the engine frame the other end of the lever
being formed as a hook that is urged by a spring to grasp a stud on a tail of the
lever that works the discharge valve of the engine, so that when this lever is moved
by its cam into the position in which it opens the discharge valve, the said hooked
lever gears with the stud and thus causes the discharge valve to be held open, until
by the opening of the gas valve by the hit-and-miss governor, the valve rod pulls the
hooked lever off the stud and thus allows the discharge valve to be closed by its
spring.
Thus it will be seen that whenever, owing to the normal speed of the engine being
exceeded, the hit-and-miss device fails to open the gas valve, the rod hereof will also
fail to draw the hook lever out of gear with the discharge valve gear, and the discharge
valve will consequently remain open.
Dated this 17th day of March 1890.
ABEL & IMKAY,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in the Means and Apparatus for Governing Gas
and Petroleum Engines.
I, CHARLES DENTON ABEL of No. 28 Southampton Buildings, Chancery Lane, in
the County of London, Consulting Engineer and Patent Agent, 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 to that construction of gas and petroleum motor engine, in
which the admission of the combustible gas or liquid into the cylinder is affected by
in
mens of an inertia governor" with "hit and mis" device, that is to say,
which, when the engine runs too fast, a reciprocating rod acted upon by a weight,
and which ordinarily pushes against a notch or projection on the gas valve lever so
as to open the gas valve, is moved by the inertia of the weight so as to miss the
valve lever and thus cause the valve to remain closed.
According to the present invention there is combined with the valve or valve lever,
a catch or stop which acts upon the discharge valve of the engine, or upon the rod
thereof, in such manner as to hold the discharge valve open during the time when
the gas or oil admission valve is not acted upon by the reciprocating rod, so that
during the ensuing strokes of the piston, the products of combustion, together with
air, are alternately expelled and drawn into the cylinder again, instead of only
drawing in and expelling air, whereby the unnecessary cooling down of the cylinder
during the time that the engine is running without power is prevented.
Figs. 1 and 2 of the accompanying drawing shew by way of example a gas motor
engine of vertical construction with the above described invention applied thereto.
is the gas valve, the rod of which is connected by a bell-crank lever w to a sliding
rod k, opposite which is a rod a pivotted to a slide p, and having a weighted arm pl
fixed to it, the slide p laving a to and fro motion imparted to it by a link o, connected
to the rod g that works the gas slider of the engine.
n is the discharge valve of the engine, closed by a spring and opened during the
discharge period by means of a bell crank lever e e', the arme of which bears with a
roller g against a cam fon the countershaft that works the gas slide.
The bell crank lever has a tail with a projecting stud h, and a lover d pivotted to
the engine frame, has a hooked end which catches over the stud h when the bell
crank lever e el has been moved into the position shewn at Fig. 2 by the cam f, in
which it holds the discharge valve open, the lever d being acted upon by a spring m
which tends to hold it in this position. The other end of the lever d is connected by
a rod c to the rod of the valve b, so that when the valve is forced open by the action
of the parts a, k, wo, the lever d is at the same time moved so as to release the stud h,
whereupon the discharge valve n will be closed by its spring when permitted to do so
by the cam f.
From the above description it will be seen, that every time the discharge valve is
opened by the cam fit will be held open by the catch until this is withdrawn again
on the opening of the gas valve b, so that when this fails to be opened by the hit-
and-miss device a k of the inertia governor, on the normal speed of the engine being
exceeded, as shewn at Fig. 2, the discharge valve remains open, allowing the products
of combustion to be drawn back again into the cylinder from the discharge pipe or
passage, as before described, until by the reduction of the speed, the inertia governor
again causes the gas valve to be opened during the charging stroke, whereupon the
discharge valve will close again.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In a gas or petroleum motor engine wherein the discharge valve for the products
of combustion is kept open during the time that the normal speed is exceeded, the

page_text: use of a catch or locking device operating on the discharge valve gear in such a
manner as to hold the discharge valve in the open position every time it is opened, the
said catch or locking device being so connected to the gas valve gear operated by an
inertia governor with hit-and-miss device, that when the gas valve is opened, the
catch is made to release the discharge valve so as to allow it to close, substantially as
described.
2. In a gas or petroleum motor engine wherein the supply of combustible gas or
liquid to the cylinder is controlled by means of an inertia governor with hit-and-
miss device, the combination, with the gas or petroleum admission valvo, of a catch
or stop acting on the discharge valve gear of the cylinder, and so arranged that
when the hit-and-miss device fails to open the said valve, the catch or stop is at the
same time made to hold the discharge valve open, substantially as and for the purposes
described.
3. In regulating apparatus for gas or petroleum motor engines such as is referred
to in the preceding claim, the combination with a bell crank lover w, actuated by an
inertia governor p, a k, and connected to the gas valve, of a rod c lever d, with
catch and spring m, the said lever being arranged to lock a stud on the tail of
the lever ee that actuates the discharge valve, when the discharge valve is opened,
and caused to release such stud when the gas valve is opened, substantially as
described with reference to the drawings.
Dated this 16th day of December 1890.
ABEL & IMRAY,
Agents for the Applicant.