Year: 1888

page_text: Date of Application, 2nd July, 1888
Complete Specification Left, 19th Mar., 1889
Complete Specification Accepted, 20th Apr., 1889
[Communicated from abroad by THE GAS MOTOREN FABRIK DEUTZ, of Deutz on the
Rhine, in the German Empire, Manufacturers.]
I, CHARLES DENTON ABEL of No. 28 Southampton Buildings Chancery Lane in
the County of Middlesex Consulting Engineer and Patent Agent do hereby declare
the nature of this invention to be as follows :-
This invention relates to valve apparatus for gas and oil motor engines, wherein the
gas valve is opened by means of a pendulum governor or inertia mechanism which
fails to open the valve when the maximum speed of the engine is exceeded.
Heretofore such inertia mechanisin has been applied either to the ignition slido or
to the rod or lever actuating the same.
According to the present invention the inertia mechanism is applied to a construc-
tion of motor engine in which there is no ignition slide, the engine cylinder being
always in communication with an igniting tube heated externally by a gas flame, and the
inlet valve for gas and air being held closed by a spring so as to open automatically on
the suction stroke of the engine piston, the ignition of the charge being effected
automatically when the highest degree of compression has been reached. In this
construction of engine, the only valves that are inechanically actuated are the escape
valve for discharging the products of combustion after the working stroke, and the
gas valve. The escape valve held closed by a spring during the suction, compres
sion, and working strokes, and is opened by a sliding rod acted upon by an automatic
cam on the engine shaft, or by an ordinary cam on a counter-shaft driven at half the
speed of the engine shaft.
This sliding rod has an arm projecting from it, to the end of which is pivotted a
pendant rod having a hook at its end which engages with a hook on the end of
the stem of the gas valve, so that when the sliding rod performs its upward
stroke, allowing the escape valve to close, it effects the opening of the gas valve
by the said hooked rod. This rod has a weighted arm projecting horizontally

page_text: 21008 tuprarements IR YAcre Apparams for VFUS ARIE CHESTOLOP Pzngines,
from it, which has its end supported by a spring of such strongth that when the
engine is working at the norinal speed, it holds the arm of the rod in such a
position as to eanse the rod to be engaged with the valvo stom, so as to open
the valve, but when the rod moves upward at a quicker speed in consequence of
the maximum speed of the engine being oxceeded, the inertia of the weighted
arm, in acting against the spring, will cause the hooked rod to be canted to one
side so as, in rising, to miss the hook of the valve stem, and consequently the
gas valve will remain closed.
It will be seen that during the ordinary working of the engine the gas valvo
will be opened at all times of the cycle excepting during the expelling stroke,
when the escape valve is opened. Inasmuch however, as the gas and air admission
valve to the cylinder remains closed oxcept during the suction stroke of the engine,
it will only allow gns to pass into the cylinder during such stroke.
Datad this 2nd day of Jul. 1000

page_text: COMPLETE SPECIFICATION
Improvements in Valve Apparatus for Gas and Oil Motor Engines.
I, (HARLES DENTON ABEL of No. 28 Southampton Buildings, Chancery Lane
in the County of Middlesex, Consulting Engineer and Patent Agent do hereby
declare the nature of this invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement :--
This invention relates to valve apparatus for gas and oil motor engines wherein
the gas valve is opened by means of a pendulum governor or inertia mechanism
which fails to open the valve when the maximum speed of the engine is exceeded.
Heretofore such inertia mechanism has been applied either to the ignition slide
or to the rod or lever actuating the igniting slide.
According to the present invention the inertia mechanism is applied to a con-
struction of motor-engine in which there is no ignition slide, the engine cylinder
being always in communication with an igniting tube heated externally by a gas
flame, and the inlet valve for gas and air being held closed by a spring so as to open
automatically on the suction stroke of the engine piston, the ignition of the charge
being effected when the highest degree of compression has been reached. In this
construction of engine, the only valves that are mechanically actuated are the escape
valve for discharging the products of combustion after the working stroke, and the
gas valve. The escape valve is held closed by a spring during the suction, compression,
and working strokes and is opened by a sliding rod acted upon by an automatic
cam on the engine shaft such as that described in the Specification to Patent
No. 17108 of 1887 or by an ordinary cam on a countershaft driven at half the speed
of the engine shaft.
This sliding rod has an arm projecting from it, to the end of which is pivotted
a pendant rod having a hook at its end which engages with a hook on the end of the
stem of the gas valve, so that when the sliding rod performs its upward stroke,
allowing the escape valve to close, it effects the opening of the gas valve by the said
hooked rod. This rod has a weighted arm projecting horizontally from it which has
its end supported by a spring of such strength that when the engine is working at the
normal speed, it holds the arm of the rod in such a position as to cause the rod to be
engaged with the valve stem so as to open the valve, but when the rod moves upward
at a quicker speed in consequence of the maximum speed of the engine being exceeded,
the inertia of the weighted arm in acting against the spring will cause the hooked rod

page_text: to be canted to one side so us, in rising, to miss the book of the valve stem and
consequently the gas valve will remain closed.
The accompanying drawing shews the before described invention applied to a
vertical construction of gas motor engine.
Fig. 1 shows a side elevation of the engine. Fig. 2 a cross section, and Figs. 3
and enlarged sectional elevation and plan of the valve gear. m is the escape valve
for the products of combustion, whose stem m' has a disc at its upper end which is
pressed upon by a helical spring n so as to keep the valve closed, except when the
stem is pressed downwards by the rod a, the roller g on the upper ond of which is
kept by the spring a in contact with the cam hon a spindle driven by toothed gear
at half the speed of the engine shaft, the action of the cam h being so timed as to
depress the rod a and thus open the valve m after the completion of the working
stroke. o is the gas valve which is pressed down on its seat by a helical spring; the
stem of this valve has a hook at its upper end which is ongaged with a hook on the
end of a rod e hinge-jointed at its upper and to an arm projecting from the
rod a.
The rode has a horizontal arm carrying an adjustable weight d and connected
by a spring p to a pin on the upper end of a.
When the engine works at the normal speed the spring holds the rod e in
the position shewn, in which during its upward motion it raises the gas valve by
means of its hook.
When the normal speed is exceeded, the inertia of the weight d causes it to
drag behind during the upward motion and in doing so it tilts the rode to one
side so as to make it miss the hook of the valve, which is thus allowed to remain
closed during the ensuing suction stroke of the piston, which consequently only
draws a charge of air into the cylinder. is the admission valve for gas and air
the space below it, being in communication with the atmosphere by the passage
while the pipe from the gas valve o communicates with the annular chamber of
surrounding the valve sent, from which the gas issues through small channels
in the seat of the valve when the latter is opened, so as to mix with the entering
air. On the engine piston performing its suction upstroke, the valve i opens
antomatically against the action of a spring and admits a charge of gas or oil
vapour and air into the cylinder, which charge is then compressed by the down
stroke of the piston, and when the highest degree of compression is reached, tho
charge is fired by the heated igniting tube k, in a mannor well known, the igniting
tube being always in communication with the cylinder.
Although the gas valve o is held open by the rods a and e at all times except
when the products of combustion are being expelled from the cylinder, yet as the
gas and air admission valve i is closed at all times except during the suction stroke of
the piston, it will be seen that gas can only enter the cylinder during such stroke.
Having now particularly described and ascertained the nature of this inven-
tion and in what mannor the same is to be performed I declare that what
I claim is 1-
1. In valve apparatus for gas and oil motor engines, the combination with a
vertically sliding rod actuated by n can driven by the engine shaft so as to open the
escape valve on its descent, of a hooked rod suspended from an arm on the said sliding
rod and adapted to engage with a hook on the stem of the gas admission valve, and
thereby to raise the latter on its ascent, the hooked rod being provided with u
weighted arm supported by a spring, so that when the normal speed of the engine is
exceeded, the inertia of the weighted arm causes the hooked rod to be moved to one!
side so as not to open the gas valve, substantially as herein described.
2. The combination of the mechanism for actuating the discharge valve and
gas valve referred to in the preceding claim, with a gas and air inlet valve,
that opens automatically during the suction stroke of the piston, and the igniting
tubo &, heated by an external flame, which tube is always in communication with

page_text: the engine cylinder and effects the ignition of the charge when the highest degree
of compression is reached, substantially as herein described with reference to the
drawings.
3. In gas or oil motor engines the use of a vertically sliding rod a actuated by
a cam h driven at half the speed of the engine shaft, which rod is so arranged
as to open the escape valve m during its downward motion, and the gas supply
valve o during its upward motion, substantially as herein described with reference
to the drawing.
T
OU 1
1 1000