Improvements in or relating to the Ball Bearings of Cycles and similar Vehicles.
Year: 1898

page_text: Date of Application, 29th Jan., 1898
Complete Specification Left, 21st Oct., 1898-Accepted, 12th Nov., 1898
PROVISIONAL SPECIFICATION.
Improvements in or relating to the Ball Bearings of Cycles and
similar Vehicles.
I, CHARLES EDWARD BELL, of 365, Lord Street, Southport, in the County of
Lancaster, Cycle Manufacturer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to the locking disc of the ball bearings of cycles or similar
vehicles, the principal object being to prevent such disc from working loose.
For this purpose instead of making the thread on the disc an ordinary V shaped
thread I propose to make it in such a manner that the entering surface or side of
the thread is vertical or nearly so and the following side inclined, and thus when.
the lock nut is tightened against the end of the hub or bracket the surface resist-
ing the withdrawal of the disc is double that of the V-shaped thread or nearly so,
the incline of the said surface giving a much better grip than that of the V shaped
thread.
The disc will therefore not be liable to work loose and the lock nut can be more
easily tightened up as the resistance to its motion is reduced in proportion as the
resistance to the withdrawing of the disc is increased. Furthermore there is no
tendency of the lock nut to turn the disc as it is being tightened up.
1
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.
Improvements in or relating to the Ball Bearings of Cycles and
similar Vehicles.
I, CHARLES EDWARD BELL, of 365, Lord Street, Southport, in the County of
Lancaster, Cycle Manufacturer, 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 the adjusting disc or cup of the ball bearings of cycles
or similar vehicles, the principal object being to prevent such disc or cup from
working loose.
The manner in which my said invention is to be performed or carried into
practical effect will be readily understood on reference to the annexed sheet of
drawings and the following explanation thereof.

page_text: Fig. 1 on the annexed drawings is a section of the hub of a bicycle wheel showing
the application of my improvements thereto and Figs. 2 and 3 are detached views
of various portions thereof hereinafter more particularly referred to.
a is the hub of the wheel which is made with one fixed cup a³, and 6 is the
fixed spindle (not shown in section) on which the said hub revolves. This spindle
is made with the ordinary cones 6* which form half of the ball-race on each side,
the other halves of the said races being formed one in the fixed cup a and the
other in the adjusting disc or cupe (see also detached views Fig. 2) which is formed
with a screw thread on the outside screwing into a corresponding thread chased
on the inside of the open end of the hub. On the outside of the adjusting disc
or cup is a locking nut (see also detached views Fig. 3) which is made with
a similar thread to screw onto the disc or cup and locks against the open end
of the hub a to prevent the said disc or cup from working loose.
For the same purpose also instead of making the screw thread on the disc or cup
an ordinary V-shaped thread I propose to use what is known as a "buttress
thread" and to make it in such a manner that the entering surface or side of the
thread is vertical, or nearly so, and the following side inclined (as shown) so that
when the lock nut & is tightened against the end of the hub a the eurface resisting
the withdrawal of the disc or cup is double that of the V-shaped thread, the
incline of the said surface giving a much better grip than that of the V-shaped
thread.
The disc or cup c will therefore not be liable to work loose and the lock nut d
can be more easily tightened up as the resistance to its motion is reduced in pro-
portion as the resistance to the withdrawing of the disc or cup c is increased.
Furthermore there is no tendency of the lock nut to turn the disc or cup c as
it is tightened up.
The application of this invention to the ball bearings of the bottom bracket of
the bicycle or of any other similar vehicle is so obvious as to need no further illus-
tration or description.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed I declare that what
I claim is:-
In ball bearings of cycles and similar vehicles, the combination of the adjusting
disc or cup formed with a "buttress" thread on the outside working in a similar
thread formed in the inside of the hub, bracket, or barrel of the bearing with a
lock nut having a corresponding thread and locking against the open end of the
said hub, bracket, or barrel, as herein before described and illustrated by the
draming ennemed.
1000
Dated this 20th day of October 1800.
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.