Year: 1896

page_text: Date of Application, 6th July, 1896
Complete Specification Left, 6th Apr...1897-Accepted, 29th May, 1897
I, FREDERICK WILLIAM LANCHESTER, of Cobley Hill, Alvechurch, in the:
County of Worcester, Engineer, do hereby declare the nature of this invention to.
be as follows:
This invention relates to improvements in clutch and driving gear and mechanism,
and has for its object to provide a simple form of friction clutch or gearing which
shall be put automatically into or out of action by variation in the speed of the-
driving shaft.
In one mode of carrying this invention into effect as applied to the transmission
of power from a gas or oil engine, I arrange on the arms of the fly-wheel or other
rotating part a number of weighted levers in such positions that they shall be
acted on by centrifugal force, and springs are provided sufficiently powerful to
restrain the loaded arms of the said levers until a certain predetermined speed is.
exceeded. Connected to the levers are brake blocks, and a brake drum is arranged
attached to the driving pulley of the motor, so that when the levers are actuated.
by centrifugal force, the brake blocks are brought to bear on the brake drum, and
the latter is caused to rotate. The levers and weights are so proportioned that:
when the motor is running at its normal working speed the whole of the power is.
easily transmitted without any slipping of the brake blocks.
In another arrangement the weights are arranged to actuate the tail end of band
or rope brakes, and the actuating weight required is thereby much reduced.
In another arrangement heavy rollers are substituted for the aforesaid levers.
and are so arranged that centrifugal force brings them into frictional contact with
both a drum on the driven shaft, and a fixed frame, in such manner that the former
is caused to rotate.
Dated 1931
TL 1000
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant..
I, FREDERICK WILLIAM LANCHESTER, of Cobley Hill, Alvechurch, in the
County of Worcester, 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 improvements in clutch and driving gear and mechanism,
and has for its object to provide a simple form of friction clutch or gearing which
shall be put automatically into or out of action by variation in the speed of the
driving shaft

page_text: The accompanying sheet of drawings illustrate the invention carried into effect
according to two modifications.
Figures 1 and 2 are respectively side and front elevations of the improved clutch
with solid blocks acting on a disc while,
Figures 3 and 4 are similar elevations with brake straps acting on a pulley.
Referring to the modification illustrated at Figures 1 and 2 as applied to the trans-
mission of power from a gas or oil engine; I arrange on the arms of the fly-wheel A
or other suitable rotating part two or more weighted levers B B in the position
shown, so that they shall be acted on by centrifugal force, and a spring or springs
such as C is or are provided sufficiently powerful to restrain the loaded arms D D
of the said levers until a certain predetermined speed is exceeded. The ends of
the levers B B form brake blocks, and a brake drum or disc E shown clearly in
Figure 1 and by a dotted circle in Figure 2, is arranged attached to the driving
pulley of the motor, so that when the loaded arms D D are actuated by centrifugal
force, the brake blocks B B are brought to bear on the brake drum E, and the
latter is caused to rotate. The levers B B and weights D D are so proportioned
that when the motor is running at its normal speed the whole of the power is
easily transmitted without any slipping of the brake blocks.
Referring now to the second modification illustrated at Figures 3 and 4 in which
similar letters denote similar parts, to those described in the previous modification,
weighted arms D D are attached to the ends F F of the brake straps G G¹ while
the other ends H H of the straps are fixed to pins on the fly-wheel A. Rotation
takes place in the direction of the arrow shown in Figure 4 and when a pre-
determined speed is reached the centrifugal pull of the blocks D D¹ on the brake
straps grip the pulley E sufficiently to transmit the power required without loss
from A to E.
Instead of bands, ropes or wires may be used as brakes.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
The centrifugal clutch hereinbefore described with reference to the accompanying
drawings.
Dated this 6th day of April 1897.
pril 1897
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.