Improvements in the Fixture of Wheels, Pulleys, Cams, or other Pieces to Shafts.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Fixture of Wheels, Pulleys, Cams, or other
Pieces to Shafts.
I, WATSON FOGGO, of Anna Valley, Andover, in the County of Hants, Engineer,
do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in the fixture of wheels, pulleys, cams
or other pieces to shafts and has especial reference in its design to the fixture of
cams to the shafts of stamp batteries.
My invention has for its object to effect the ready and secure fixture of a wheel,
pulley, cam or other piece to a shaft and its ready disconnection when required,
and has for its further object to provide for the fixture of any cam into any
determined angular position, so that all cams may be capable of interchange for
renewal or repair, the use of a continuous keyway obviated, and the shaft rendered
stronger by provision of independent keyways at different determined positions
upon the periphery of the shaft.
My invention consists in the provision of a keyway on the shaft or upon the
boss of the cam or other piece having its surface provided flat, inclined or non-
tangential to a circle corresponding to the internal periphery of the boss or the
external periphery of the shaft, and in the provision of a corresponding keyway
in the shaft or boss which is circular, a key being provided of circular configuration
which has however provided thereupon a flat surface which engages with the
inclined or non-tangential surface which may be provided either upon the boss,
as is preferable, or upon the shaft, so that as the wheel or other piece rotates in
working the stress imposed will cause the inclined or non-tangential surface of
the boss or of the shaft to be forced in contact with the flat surface of the key,
the key by its circular configuration adapting itself so that the wheel or other
pieco becomes bound upon the shaft, and my invention further consists in its
application to the fixture of cams upon the shafts of stamp batteries, in the
provision of keyways at independent determined angular positions upon the
periphery of the shaft.
In carrying my invention into effect in its application to the fixture of cams
upon the shafts of stamp batteries-I provide a shaft with keyways at positions
determined by the distance of the stamps one from the other and at angular
positions in sequence which determine the angular positions of the cams and the
drop of the stamps.
I provide the keyways with semi-circular beds into which the circular keys
snugly fit, the upper surface of the key being provided flat, and the boss of each of
the cams being provided in the same position with an internal keyway which is
flat and so inclined that upon the operation of the cams the resistance due to lifting

page_text: causes the inclined surface to move into such a position as to bind the boss of the
cam upon the shaft, the circular configuration of the key allowing the slight
movement necessary, while a suitable clearance is allowed upon each side so that
the key may be readily introduced and readily released when it is required to
remove the cam from the shaft for renewal or repair.
It is obvious that I may provide the circular keyway or bed upon the cam boss
and a corresponding inclined and non-tangential surface upon the shaft.
In arranging interchangeable cams upon a shaft as hereinbefore described, I
may, if preferred, provide the keyway as a square. bed or slot in the shaft and an
inclined or non-tangential bed or slot within the boss of the cam or vice versa,
suitable clearances being allowed on each side of the corresponding wedge-shaped
key so as to allow of lateral movement for the binding of the cam upon the shaft.
I do not limit the application of my invention to the specific purposes mentioned
in the foregoing as it is obvious that I may similarly apply my invention to other
purposes and modify constructional details to suit particular requirements.
MARKS & CLERK.
18, Southampton Buildings, London, W.C., Agents.
Improvements in the Fixture of Wheels, Pulleys, Cams, or other
Pieces to Shafts.
I, WATSON FOGGO, of Anna Valley, Andover, in the County of Hants, 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:-
My invention relates to improvements in the fixture of wheels, pulleys, cams
or other pieces to shafts and has especial reference in its design to the fixture of
cams to the shafts of stamp batteries..
My invention has for its object to effect the ready and secure fixture of a wheel,
pulley, cam or other piece to a shaft and its ready disconnection when required,
and has for its further object to provide for the fixture of any cam into any
determined angular position, so that all cams may be capable of interchange for
renewal or repair, the use of a continuous keyway obviated, and the shaft rendered
stronger by provision of independent keyways at different determined positions
upon the periphery of the shaft.
My invention consists in the provision of a keyway on the shaft or upon the boss of
the cam or other piece having its surface provided flat or curved and inclined or non-
tangential to a circle corresponding to the internal periphery of the boss or the
external periphery of the shaft, and in the provision of a corresponding keyway
in the boss or shaft which is circular, a key being provided of circular configuration
which has however provided thereupon a flat or curved surface which engages
with the inclined or non-tangential surface which may be provided either upon the
boss as is preferable, or upon the shaft, so that as the wheel or other piece rotates
in working the stress imposed will cause the inclined or non-tangential surface of
the boss or of the shaft to be forced in contact with the flat surface of the key,
the key by its circular configuration adapting itself to maintain the opposing
surfaces in contact so that the wheel or other piece becomes bound upon the shaft.
In the accompanying drawings
Figure 1 is an end elevation of a cam applied to the shaft of a stamp battery,

page_text: which elevation is partly in section on the line xy of Figure 2 which is a front
elevation corresponding to Figure 1.
In carrying my invention into effect in its application to the fixture of cams.
upon the shafts of stamp batteries as illustrated in the accompanying drawings,
I provide a shaft with keyways at positions determined by the distance of the
stamps one from the other and at angular positions in sequence which determine
the angular positions of the cams and the drop of the stamps.
I provide the keyways with semicircular beds A into which the circular
keys a, b, c, d, e, snugly fit, the upper surface B of the keys being provided flat,
and the boss F of each of the cams G being provided in the same position with an
internal keyway H which is flat and so inclined that upon the operation of the
cam G the resistance due to lifting which acts in the direction indicated by the
arrow causes the inclined surface to move into such a position as to bind the boss
of the cam upon the shaft, the circular configuration of the key allowing the
slight rotary movement necessary to maintain the surface in contact while a
suitable clearance h, h, is allowed upon each side so that the key may be readily
introduced and readily released when it is required to remove the cam from the
shaft for renewal or repair.
It will be seen that the stress imposed upon the cam in lifting the stamps tends
to bind the boss upon the shaft; and that as a suitable clearance is allowed for
the purpose the cam may be released from the shaft by a slight movement in the
opposite direction which may be produced by a blow of the hammer.
It is obvious that I may provide the circular keyway or bed upon the cam boss
and a corresponding inclined and non-tangential surface upon the shaft.
I do not limit the application of my invention to the specific purpose mentioned
in the foregoing, as it is obvious that I may similarly apply my invention to other
purposes and modify constructional details to suit particular requirements.
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 the fixture of cams, wheels, pulleys, and other pieces to shafts the
provision of a key of a form partially circular diametrically for the allowance of
slight rotation within a keyway of corresponding shape provided either upon the
boss of the piece or upon the shaft such key having a face for engagement with
an opposing surface upon the shaft or upon the boss of the piece which is inclined
or non-tangential to a circle corresponding to the external periphery of the shaft
or the internal periphery of the boss substantially as and for the purpose herein-
before described.
2. Means for the fixture of cams, wheels, pulleys or other pieces to shafts
consisting of a key of a form partially circular diametrically for the allowance
of slight rotation within a keyway of corresponding shape provided upon the shaft,
such key having a flat face for engagement with an opposing surface upon the boss
of the piece which is inclined or non-tangential to a circle corresponding to
the internal periphery of the boss or the external periphery of the shaft, such
inclined or non-tangential surface being provided of a width to allow slight
rotation of the boss in either direction in relation to the shaft substantially as and
for the purpose hereinbefore described and illustrated.
3. Means for the fixture of cams, wheels, pulleys, or other pieces to shafts
consisting of a key of a form partially circular diametrically for the allowance of
slight rotation within a keyway of corresponding shape provided upon the boss
of the piece such key having a flat face for engagement with an opposing surface
upon the shaft which is inclined or non-tangential to a circle corresponding to
the internal periphery of the boss or the external periphery of the shaft, such
inclined or non-tangential surface being provided of a width to allow slight
rotation of the boss in either direction in relation to the shaft substantially as
and for the purpose hereinbefore described.

page_text: 4. Means for the fixture of wheels, pulleys or other pieces to shafts and more
especially the fixture of cams to the shafts of stamp batteries substantially as and
for the purpose herein before described and illustrated.
Dated this 20th day of Sentember 1897
MARKS & CLERK.
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.