Improvements in or connected with Ball Bearings for Velocipedes and other Road Carriages.
Year: 1897

page_text: Date of Application, 29th June, 1897
Complete Specification Left, 29th Mar., 1898-Accepted, 7th May, 1898
PROVISIONAL SPECIFICATION.
Improvements in or connected with Ball Bearings for Velocipedes and
other Road Carriages.
I, SAMUEL TWEEDALE, of 190, Deepland Terrace, Milkstone Road, Rochdale,
in the County of Lancaster, Mechanic, do hereby declare the nature of this inven-
tion to be as follows:-
This invention consists in improvements in the construction of ball bearings
for velocipedes and other road carriages for which I have filed an application
for Letters Patent numbered 9248 A.D. 1897, the object of these improvements
being chiefly to dispense with flanges on the cupped ball races so that the axle
with the ball races can be bodily withdrawn from the hub or barrel.
According to this invention the ends of the barrel of the hub or of the crank
bearing casing are enlarged internally and tapped, except in the case of the chain
wheel end of the driving wheel hub which is not enlarged internally but screwed
externally for the chain wheel seat and with an opposite thread for a lock nut.
The smaller part of the barrel is bored out parallel at the ends and there is fitted
into each end a cupped ball race the concave face of which is directed inwards.
The ball races are prevented from turning by pins fixed in the barrel and engaging
into slots in the races or vice versa. The cupped ball races are reduced at their
outer ends in diameter so as to form shoulders. Between the two races a distance
piece adjusted to the required length is placed, which is formed of a piece of
tubing slotted along one side. Into the tapped ends of the barrel externally
threaded hoops are screwed which are bored out to fit the reduced part of the ball
races and bear against the shoulders thereof when screwed into the barrel und
fix the cupped races in the same. After unscrewing one of the hoops, the axle
with the races can be drawn out at this end. The axle is fitted with cones formed
with cylindrical parts passing through the cups and having lock nuts screwed
against them upon the axle, which prevent the cups from becoming detached
from the axle.
At the chain wheel end the look nut for the same is formed with an internal
flange bored to fit the reduced part of the ball race, against which flange the
shoulder of the race is pressed by means of the distance piece when the other race
is- forced inwards by screwing up the hoop.
Preferably one of the cones on the axle is screwed upon the same and adjusted
and locked in position in the ordinary way. In some cases both cones may be
fixed on the axle, and one of the cupped races screwed externally on its larger
part, the tapped enlargement of the barrel being continued for a longer distance,
so that the race can be screwed into it and locked by means of the sorewed hoop
bearing against the shoulder on the race.
1007

page_text: Improvements in or connected with Ball Bearings for Velocipedes and
other Road Carriages.
I, SAMUEL TWEEDALE, of 190, Deepland Terrace, Milkstone Road, Rochdale,
in the County of Lancaster, Mechanic, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement:―
This invention consists in improvements in the construction of ball bearings
for velocipedes and other road carriages, the object of these improvements being,
chiefly, to dispense with flanges and screw threads on the cupped ball races so
that the axle with the ball races can be bodily withdrawn from the hub or barrel,
and in manufacturing the ball races, to enable the latter to be ground up true
after hardening them.
In order that my invention may be readily understood, I have attached hereunto
a sheet of drawings to which I will now refer. In the several views like parts
are indicated by like letters of reference. Figure 1 represents a part sectional
elevation along the axis of my improved ball bearing applied to the hub of a wire
spoked wheel. Figure 2 represents a sectional elevation along the axis of a
modification of my invention. Figure 3 represents an elevation of my improved
modified bearing removed from the hub or the casing.
In accordance with this invention the ends a¹ of the barrel a of the hub or of
the crank bearing or other casing are enlarged internally or recessed and tapped
except in the case of the chain wheel end a* of the driving wheel hub when the
latter is driven through a chain, in which case it is not enlarged internally but
is shewn screwed externally as to form the chain wheel seat and is formed with a
reduced boss a³ and with an opposite thread for a lock nut a. The chain wheel a³
is tapped to fit the screwed part a³ and is secured thereon by the lock nut a*.
The smaller part of the barrel or casing a is bored out cylindrical at the ends
and there is fitted into each end a cupped ball race the concave face of which
is directed inwards. The cupped ball races b are reduced at their outer ends in
diameter so as to form shoulders b. Between the two races a distance piece c
adjusted to the required length is placed. This is preferably formed of a piece
of tubing slotted along one side as shewn at o' Figuro 1, so as to enable it to be
transversely flexible and spring against the inside surface of the barrel. Into
the tapped ends of the barrel a externally threaded hoops d are screwed which
are bored out to fit the reduced part of the ball races and bear against the
shoulders thereof when screwed into the barrel and fix the cupped races b in the
same. In the drawings the bearings illustrated are shewn as to applied to driving
wheel hubs, in which cases the externally threaded or screwed hoops are only
used at ono end. But in the case of other bearings, for instance, idle wheels or
crank axle bearings, both ends of the bearings are formed alike with externally
screwed hoops. These screwed hoops d bearing against the ball races force
them against the distance piece c and generally prevent the ball races from
turning round independently of the casing. After unscrewing one of the hoops
the axle e with the races b and distance piece c can be drawn out at this end. The
axle is fitted with cones f and g formed with cylindrical parts f', g', passing
through the cups, having flats f, g, to facilitate turning them round, and having
lock nuts f, g, screwed against them upon the axle, which prevents the cups
from becoming detached from the axle.
One cone f only is screwed upon the axle generally. This permits of adjusting

page_text: the bearings by screwing the cone outwards, causing both cones to press against
the balls in the races b.
At the chain wheel end of the bearing the lock nut a for the same is formed
with an external flange a bored to fit the reduced part 6' of the ball race b,
against which flange the shoulder at the reduced part of the race is pressed by
means of the distance piece c, when the other race is forced inwards by screwing
up the hoop d.
Preferably one of the cones on the axle is fixed upon the same, and against a
collar or shoulder e¹ formed in the proper position in the ordinary way.
In the modification illustrated by Figures 2 and 3, the peripheral surfaces 6°
of the ball races 6 are slightly reduced, and a groove & turned therein. The
distance piece c is extended in length and has an internal bead formed prefer-
ably by grooving the external surface at each end, as illustrated in Figures 2
and 3. The ends of the distance piece c are also slit longitudinally, the slits o
running sufficiently far to enable the ends of the piece e to spring over the cups
until the beads crest in the grooves b³. When the bearing is inserted into the
barrel of the hub or casing the ends of the distance piece c cannot expand, and
the cups and distance pieces are thus held in position.
b
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:-
First. In ball bearings for the wheels and gearing of velocipedes and other road
carriages the method of arranging and securing in position in the hub or casing
the parts forming the bearing, which consists in mounting the ball races and
balls upon outwardly inclining coues secured to and capable of relative adjust-
ment upon the axle, arranging a tubular distance piece between the ball races,
and securing the assembled parts in the hub or casing by hoops screwed into or
outo the hub or casing substantially as herein before described with reference to
Figura 1 of the drawings hereunto annexed.
Second. The improved construction of ball bearings for the wheels and gearing
of velocipedes and other road carriages which consists in mounting the ball races
and balls in position upon outwardly inclined cones secured to and capable of
relative adjustment upon the axle, by means of a tubular distance piece having
flexible ends gripping the ball races and holding them in position by means of
grooves in the ball races and beadings entering therein formed upon the inside
of the tubular distance piece and securing such bearing in the hub or casing by
means of hoops screwed into or onto the hub or casing substantially as herein-
before described with reference to Figures 2 and 3 of the drawings hereunto
annexed.
Dated the 0th day of M 1000
R. J. URQUHART,
57, Barton Arcade, Manchester,
Harrington Chambers, 24, North John Street, Liverpool,
Consulting Engineer and Patent Agent.