Improvements in Gas Motor or Oil Motor Cars.
Year: 1894

page_text: Date of Application, 26th Apr., 1894
Complete Specification Left, 22nd Feb., 1895-Accepted. 23rd Mar. 1305
PROVISIONAL SPECIFICATION.
Improvements in Gas Motor or Oil Motor Cars.
I, HENRY PERCY HOLT, of No. 22, Chancery Lane, in the County of London,
Engineer, do hereby declare the nature of this invention to be as follows:-
When a car is driven by a gas motor or oil motor engine having its cylinder situated
in the vertical line of one of the axles or nearly so, the pressure in its cylinder acting
on the connecting rod, when it is in a position inclined to the axis of the cylinder
produces a vertical resultant force which, acting through the springs, causes certain
vertical oscillation of the car.
My invention relates to means of lessening this oscillation.
For this purpose,
instead of fitting the axle box to slide vertically I arrange it to slide in a line at
right angles or nearly so to the line of the connecting rod when it is exerting its
When it
maximum thrust on the car, thus eliminating the vertical resultant force.
is inconvenient to fit the axle box to slide obliquely, I place the cylinder at such
an inclination that the recoil force acting in it shall be opposite and nearly equal to
the vertical resultant of the thrust of the connecting rod.
As the oscillation is most sensible when the car is at rest the engine still running,
I may provide for reducing the oscillation only under these conditions, effecting the
reduction of the oscillation in the following manner. For the purpose of varying
the speed of the car and starting and stopping it, a lever is employed by which the
driving gear of the axles is connected, disconnected or varied.
I connect this lever or its spring catch to a valve so that when the lever is in
position to stop the car, the gas supply of cylinder charge is reduced, the piston
Instead of
therefore being thus subjected to correspondingly reduced pressure.
this arrangement I may effect the reduction of gas charge, by means of the governor
in the following manner.
The governor is usually provided with an adjustment such that the engine can be
run at reduced speed when the car axles are disconnected from the engine shaft.
I arrange the governor
in such a manner that when it is so adjusted it acts on the
gas supply valve so as not to cut off the gas but to admit the gas to the cylinder at
a later period of the charging stroke, the pressure resulting from combustion of
the charge, being thus materially reduced. .
Instead of varying the cylinder charge as above described, the lever which is
employed to vary the speed or stop the car may be connected to blocks applying
pressure against the axle boxes so as to cause friction and thus reduce oscillation of
the car.
Dated this 26th day of April 1894.
ABEL & IMKAI,
Agents for the Applicant.

page_text: improvements in Gas motor or On Motor Cars.
I, HENRY PERCY HOLT, of No. 22 Chancery Lane, in the County of
London, 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 :-
When a car is driven by a gas motor or oil motor engine having its cylinder
situated in the vertical line of one of the axles or nearly so, the pressure in its
cylinder acting on the connecting rod, when it is in a position inclined to the axis
of the cylinder produces a vertical resultant force which, acting through the springs,
causes certain vertical oscillation of the car.
My invention relates to means of lessening this oscillation.
For this purpose,
as shewn in Fig. 1 of the accompanying drawings-instead of fitting the axle box A
to slide vertically, I arrange it to slide in a line A B at right angles or nearly
so to the line BC of the connecting rod when it is exerting its maximum down-
ward thrust on the car, thus eliminating the vertical resultant force.
When it is inconvenient to fit the axle box to slide obliquely, I place the cylinder
at such an inclination that the recoil force acting in it shall be opposite and nearly
equal to the vertical resultant of the thrust of the connecting rod. As the
oscillation is most sensible when the car is at rest the engine still running, I may
provide for reducing the oscillation only under these conditions, effecting the
reduction of the oscillation as I shall describe with reference to Fig. 2 which is an
elevation partly in section and Figs. 3 and 4 which are part plans of apparatus for
this purpose. For varying the speed of the car and starting and stopping it, a lever L
is employed by which the driving gear of the axles is connected, disconnected or
varied connect this lever through a cam lever D having an arm E, and a chain F
to a weight G on one arm of a lever H the other arm of which bears on the stem K
of the gas supply valve M through which there are several small holes. When
the lever is in the middle position shewn, to stop the car, the weight G takes such
a position that the valve M closes reducing the gas supply of the cylinder charge,
the piston therefore being thus subjected to correspondingly reduced pressure. But
when the lever L is moved to either side, the cam lever D and weight G are raised,
the valve M being thus held open. Instead of this arrangement I may effect the
reduction of gas charge, by means of the governor in the following manner.
The governor is usually provided with an adjustment such that the engine can be
run at reduced speed when the car axles are disconnected from the engine shaft. I
arrange the governor in such a manner that, when it is so adjusted, it acts on the
gas supply valve so as not to cut off the gas but to admit the gas to the cylinder
at a later period of the charging stroke, the pressure resulting from combustion
of the charge being thus materially reduced.
In order that the governor may thus act I make the cam that opens the gas
valve as shewn in plan in Fig. 5 and in elevation Fig. 6 providing a step S such
that when the valve lever, which this cam actuates, is moved by the governor off
the part U on to the part V of the cam, it is actuated so as to open the gas valve
at a later period of the charging stroke.
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. For lessening oscillation of a gas or oil motor car, inclining the axle box
guides relatively to the axis of the cylinder, or the axis of the cylinder relatively

page_text: the connecting rod when it is in its position of greatest downward thrust,
substantially as described.
2. In combination with the starting lever of the car, the cam lever, chain, loaded
lever and valve, arranged and operating substantially as described with reference
to Figs. 2, 3 and 4.
3. In combination with the governor of a gas or oil motor engine, and the gas
valve lever moved by it, a cam so stepped that when the lever is moved down the
step the gas valve is opened later in the stroke, substantially as described with
reference to Figs. 5 and 6.
Dated this 22nd day of February 1895.
ABEL & IMRAY,
Agents for the Applicant.