provements in Inertia Governors.
Year: 1899

page_text: *provements in Inertia Governors.
I, FREDERICK WILLIAM LANCHESTER, of 53, Hagley Road, Birmingham, in the
County of Warwick, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to an improved form of inertia governor specially applic-
able for use on motors employed in vehicle propulsion, and the object of the
invention is to provide an inertia governor for controlling the gas oil or steam
supply in a rapid and efficient manner, and so constructed that jolting or vibration
of the car does not affect the governors.
The invention consists generally in suspending by its centre of gravity a
weighted lever on the same pin or about the same centre of the admission lever
destined to control the supply of working fluid to the motor, the weighted lever
being caused to control a tumbler carrying a blade terminating with a knife edge
adapted to engage with a catch plate. The tumbler and blade form to all
intents and purposes a single piece and are carried by a pin from the admission
lever on which they are carefully balanced about their centre of gravity. Stops
are provided to limit the freedom of the weighted lever and a spring is provided
whereby the speed of running may be regulated.
In one mode of carrying this invention into effect as applied to an oil motor
engine I suspend a tumbler carrying a blade to ride about a pin attached to one
extremity of the admission lever, and arrange same to balance about that pin
as hereinbefore described. The said tumbler is furnished with a forked pro-
longation in which works a pin carried by a weighted bar carefully balanced and
centred co-axially with the admission lever. The blade extends forwards approxi-
mately in the line of motion of the lever and the forked extremity extends some-
what in the direction of the lever limb; a spring is attached either to the
tumbler or blade tending to cause the blade to engage with a suitably arranged
catchplate whereby the vapour valve is opened, a stop is provided on the admission
tever to prevent the blade being drawn past its right position.
"
When the motor is running at a speed below that at which the governor is
et to cut out and the lever advances to give admission to the charge, then
he weighted lever is caused to follow by the tension of the spring acting through
he tumbler fork and an admission duly takes place, if however the motor over-
uns its speed then the spring has not time to act and the weighted lever gets
eft behind and throws the tumbler blade out of action.
The spring instead of being attached to the tumbler may be arranged to act
irectly on the weighted lever.
It will be understood that both elements whose inertia is involved in the act
governing are suspended by their centres of gravity and translational motion

page_text: of the motor body in no way influence their action, the lagging that takes place
when they are in action is a rotational lag and not a translational one.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents.
I, FREDERICK WILLIAM LANCHESTER, of 53, Hagley Road, Birmingham, in the
County of Warwick, 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:-
―
This invention relates to an improved form of inertia governor specially applic-
able for use on motors employed in vehicle propulsion, and the object of the
invention is to provide an inertia governor for controlling the gas oil or steam
supply in a rapid and efficient manner, and so constructed that jolting or vibration
of the car does not affect the governors.
The invention consists generally in suspending by its centre of gravity a
weighted lever on the same pin or about the same centre as the admission lever
destined to control the supply of working fluid to the motor, the weighted lever
being caused to control a tumbler carrying a blade terminating with a knife edge
adapted to engage with a catch plate. The tumbler and blade form to all
intents and purposes a single piece and are carried by a pin from the admission
lever on which they are carefully balanced about their centre of gravity. Stops
are provided to limit the freedom of the weighted lever and a spring is provided
whereby the speed of running may be regulated.
Referring now to the accompanying drawings which illustrate one modifica-
tion of my invention as applied to an oil motor engine, I pivot a tumbler, d
carrying a blade e about a pin h, passing through the centre of gravity of the
tumbler and blade, and attached to one extremity of the admission lever b. The
tumbler d is furnished with a forked prolongation in which works a pin or
block carried by the weighted lever a. The levers a and b are pivoted on the
same pin q, which passes through the centre of gravity of a; and has an arm t
carrying the roller o by which it is actuated by the cam e mounted on the cam
shaft P. The blade e extends forwards approximately in the line of motion of
the pins and r, and the forked extremity protrudes in the line of the lever a.
A spring m is attached to the lever a or alternatively a spring n is attached to
the blade e or tumbler d, the tension of the spring in both cases, tending to
hold the stop attached to the lever a against the long arm of the lever
that the levers a and b will move together and the blade e will be in a position
to engage with a suitably arranged catchplate y, whereby the vapour valve is
opened. A spring s pulls back the lever b, and consequently the lever a against
the action of the cami e till the lever a makes contact with the stop j, and holds
the roller o just clear of the cam during the period of repose.
so
When the motor is running at a speed below that at which the governor is set
to cut out and the lever b advances to give admission to the charge, the
weighted lever a is caused to follow by the tension of the spring m or the
spring and an admission duly takes place. If, however, the motor overruns
its speed then the spring has not time to act, and the weighted lever gets left

page_text: behind; and throws the tumbler blade out of action. The springs which has
a stronger resisting moment to extension about the pivot q than the spring m
or the spring a returns both levers to their positions, as shewn in the drawing.
The stop prevents the lever a having more range of motion than is necessary for
its proper performance. The springs m ornare adjustable to permit of varying
the maximum speed of the motor.
k
It will be understood that both elements whose inertia is involved in the act
of governing, that is the lever a, and the tumbler and blade (which act as
one piece), are suspended at their centres of gravity. Therefore translational
motions of the motor body in no way influence their action, the lagging that
takes place when they are in action being a rotational and not a translational
lag.
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 valve gear for engines, controlling the speed of the engine by means
of a weighted lever pivoted at its centre of gravity which in ordinary running
oscillates with a valve lever but which, when the speed is excessive, lags behind
the said valve lever by virtue of its inertia and so actuates a hit and miss device
between the said valve lever and the valve, substantially as described.
2. In valve gear for engines, controlling the admission valve by means of a
balanced weighted lever pivoted coaxially with an admission lever, the said
admission lever being oscillated by a cam and carrying a tumbler and a blade,
adapted to engage with a catchplate, which opens the said valve, the said balanced
lever having a pin, which engages with a forked projection on the said tumbler,
substantially as described.
3. In valve gear for engines, the combination of a balanced weighted lever
such as a with a lever such as b, a tumbler such as d, a blade such as e, and a
spring such as m, substantially as and for the purposes described.
4. In valve gear for engines, the combination of a balanced weighted lever
such as with a lever such as b, a tumbler such as d, a blade such as c, and a
spring such as n, substantially as and for the purposes described.
5. The inertia governor substantially as hereinbefore described with reference
o the accompanying drawing.
14
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents.