Improvements in Ball Bearings.
Year: 1899

page_text: 14
.:.
Date of Application, 17th Oct., 1899
16th July 1900-Accented. 18th Aug.. 1900
Improvements in Ball Bearings.
I, ALFRED THOMAS PRYCE,
61, Dearman Road, Sparkbrook, Birmingham,
in the County of Warwick, Foreman Tool Maker, do hereby declare the nature
of my said invention to be as follows:-
My invention has for its object improvements in ball bearings by which I
decrease the surface of contact of the balls and consequently reduce the
friction.
In carrying my invention into practice I form the angle of the surface of my
cones so that at the point of contact of the balls the diameter is the
This angle may
same size as the diameter of the balls of which I only use six.
be determined by measuring from the centre line of the balls when in position
half the diameter of the interior of the cup along the centre line of the spindle
or axle and then striking a line from this point so as to just touch the balls.
That is to say the distance from the centre of the centre line of the balls to the
point where the lines of the angle of the cone meet is half the diameter of the
interior of the cup. The balls being the same side in diameter as the diameter
of the cone at the point of contact. By this means it will be seen that the
surface contact of the balls upon cones and cups is materially reduced thereby.
reducing friction to a minimum. One of the cones may be fixed to or formed
with the spindle or axle and the other adjustable or both fixed at one or both
of the cups adjustable.
Boted this 16th day of October 1899.
ALFRED THOMAS TRIVE,
By George Barker,
Fellow of the Chartered Institute of Patent Agents,
L
Agent for Applicant,
77, Colmore Row, Birmingham.
Improvements
I, ALFRED THOMAS PRYCE, of 61; Dearman Road, Sparkbrook, Birmingham,
in the County of Warwick, Foreman Tool Maker, do hereby declare the nature
of my said 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 has for its object improvements in ball bearings by which I
decrease the surface of contact of the balls and consequently reduce the

page_text: In carrying my invention into practice I form the angle of the surface of my
cones so that at the point of contact of the balls the diameter is approximately the
same size as the diameter of the balls of which I only use six. This angle may
be determined by measuring from the centre line of the balls when in position
half the diameter of the interior of the cup along the centre line of the spindle or
axle and then striking a line from this point so as to just touch the balls. That
is to say the distance from the centre of the of the centre line of the balls to the
point where the lines of the angle of the cone meet is half the diameter of the
interior of the cup. The balls being approximately the same size in diameter as
the diameter of the cone at the point of contact. One of the cones may be
fixed to or formed with the spindle or axle and other adjustable or both fixed
and one or both of the cups adjustable.
In order that my invention may be more clearly understood and easily carried
into practical effect I have appended hereto a sheet of drawings upon which I
have illustrated an example of my improved bearing as applied to the hub and
bottom bracket bearing of a velocipede.
Figure 1 is a part sectional end view of a bottom bracket bearing of a cycle
made according to my invention.
Figure 2 is a part longitudinal sectional view of Figure 1 taken on the
line 12.
Figure 3 is a part longitudinal sectional view of a back hub bearing of a
cycle made according to my invention.
Figure 4 is a part cross sectional view of Figure 3 taken on the lines X-Y.
Figure 5 is a diagram view showing how I obtain the angle or inclination of
my cones or half ball races.
In carrying my invention into practice I form the angle of the surface of my
cones or half ball races A so that at the point of contact a¹ of the balls B the
diameter of the cones is approximately the same size as the diameter of the
balls consequently the balls are larger than is usual in bearings of this description
and I only use six as clearly shewn at Figures 1 and 4.
I find that the particular angle or inclination of the cones or half ball races A¹
from which I obtain the best results is determined by measuring from the
centre line of the balls when in position half the diameter of the interior of
the cup or half ball race C along the centre lines of the spindle or axle S and
then striking the lines from the point so as to just touch the balls B
as clearly shewn in the diagram view Figure 5. That is to say the distance
from the point to the point where the lines of the angles of the cone meet
is the same distance as from the point 62 to the point bor half the diameter of
the interior of the cup or half ball race C. The balls B being approximately
the same diameter as the diameter of the cone or half ball race A at the point of
contact.
One of the cones or half ball races A may be fixed either by screwing up to
a shoulder formed on the spindle and the other one adjustable as clearly shewn
at Figure 3 or the fixed cone or half ball race may be formed in one with the
spindle or axle. Or I may form both the cones A fixed and in one with the axle.
or spindle the cups or half ball races C being adjustable as clearly shewn at
Figure 2.
By forming the cones or half ball races as herein described and shewn it will
be seen that the points of the surface contact of the balls upon the cones or half
ball races A is materially reduced thereby reducing friction to a minimum.
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:
First. The imunaramanta
CLAIMS.
111 1

page_text: with six balls working around the cone each of which is approximately the same
diameter as the cone at the point of contact the cup containing the ball being
substantially three times the diameter of the balls and of the cone at the point
of contact.
Second In ball bearings forming the cones or half ball races so that the
angle or inclination of the surface of the cones at the point of contact with the
balls is approximately the same diameter as the diameter of the balls substantially
as herein set forth and as shewn.
Third In ball bearings forming the cone or half ball race on its surface at
such an angle substantially as hereinbefore set forth and as shewn at Figure 5
that the diameter of the cone at the point of contact with the balls is approxi-
mately one third the diameter of the interior of the cup or other half ball race
in the manner and for the purpose substantially as herein set forth and as shewn
upon the accompanying drawings.
THIS
ALFRED THOMAS PRYCE.
By George Barker,
Fellow of the Chartered Institute of Patent Agents,
Agent for Applicant,
77, Colmore Row, Birmingham.