Improvements in the Ball Bearings of Cycle Crank Wheels.
Year: 1892

page_text: Date of Application, 9th Sept., 1892
Complete Specification Left. 21st Jan., 1893-Accepted, 18th Mar., 1893
PROVISIONAL SPECIFICATION..
Improvements in the Ball Bearings of Cycle Crank Wheels.
We CHARLES BENJAMIN TOWNSEND Manufacturer, and GEORGE GILBERT
Foreman, of the Centaur Cycle Co. West Orchard Coventry in the County of
Warwick do hereby declare the nature of our said invention to be as follows:-
Our invention has for its object improvements in the ball bearings of cycle crank
wheels by which the bearing of such wheels is brought immediately into the centre
of the wheel thus preventing any of the side pull or twist which has hitherto
occurred when the balls have been on the one side.
In carrying our invention into effect we recess the chain or crank wheel in the
centre so as to receive a hardened steel cup which in turn receives the balls and
which is recessed sufficiently for the centre of the balls to be immediately in the.
centre of the wheel an hardened steel cone being formed upon the bottom bracket
between which and the cup the balls work forming a perfectly central bearing to
the wheel. The hardened steel cup is shrunk into the recess and is shaped to
receive the balls and has a hole for the spindle to pass through the adjustment is
effected through the spindle from the other side of the bottom bracket. In this
manner a most compact and light arrangement is effected and the pull of the chain
is direct upon the bearing of the wheel.
Dated this 8th dow of Santambor 120
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent.
COMPLETE SPECIFICATION.
Improvements in the Ball Bearings of Cycle Crank Wheels.
We, CHARLES BENJAMIN TOWNSEND Manufacturer, and GEORGE GILBERT,
Foreman, of the Centaur Cycle Co. West Orchard Works, Coventry, in the
County of Warwick, do hereby declare the nature of our said invention and in
what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
Our invention has for its object improvements in the ball bearings of cycle crank
wheels and crank hanger by which the bearing is brought immediately into the
centre of the wheel and directly under the chain thus preventing any of the side
pull or twist which has hitherto occurred when the balls have been on the one side.
In carrying our invention into effect we recess the chain or crank wheel in the
centre so as to receive a hardened steel cup which in turn receives the balls and
which is recessed sufficiently for the centre of the balls to be immediately in the
centre of the wheel. Au hardened steel cone is formed upon the bottom bracket
or crank hanger between which and the cup the balls work forming a perfectly
central bearing to the wheel.
The hardened steel cup is shrunk into the recess and is shaped to receive the balls
and has a hole for the spindle to pass through. The adjustment is effected through
the spindle from the other side of the bottom bracket in the usual manner.
By
these means a most compact and light arrangement is effected & the pull of the
chain is direct upon the bearing of the wheel.
In order that our invention may be clearly understood and more easily carried
into practice we have appended hereunto a double sized sheet of drawings upon
which we have fully illustrated the nature of our said improvements.

page_text: Figure 1., is a plan of the crank hanger showing the crank wheel bearing in
section.
The chain or crank wheel A is provided with the recess a¹ in which the hardened
steel cup B is fitted the cup being recessed sufficiently to allow of the balls H being
placed in a position with their centre the same as the centre of the wheel being
retained in position by the hardened steel cone E which is formed upon the bottom
bracket or crank hanger F and between which & the cup the balls work thus
forming a perfectly central bearing to the crank wheel A. The hardened steel
cup B is shrunk into the recess a¹ and is shaped to receive the balls H and has the
hole 6 for the spindle K to pass through the adjustment being effected through the
spindle K from the other side in the usual manner:
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
In the ball bearings of cycle crank wheels the crank wheel A recessed at a' with
hardened steel cup B for bringing the centre of the balls H central with the pull of
the chain on the wheel substantially as herein set forth and shown.
Dated this 20th day of January 1893.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent..