Improvements in the Bearings or Cycles.
Year: 1894

page_text: Date of Application (in United Kingdom), 28th Dec., 1894
Complete Specification Left, 28th Dec. 1894-Accepted, 16th Feb.. 1895
Improvements in the Bearings or Cycles.
I, THOMAS BOYD, of Manchester Street Christchurch, in the Provincial District
of Canterbury, in the Colony of New Zealand, Cycle Manufacturer, do hereby
declare the nature of this invention and what manner the same
performed, to be particularly described and ascertained in and by the following
statement:—
18 to be
The ordinary "crank bracket" bearings of bicycles are liable to become jammed
when under pressure owing to the balls having only two bevilled beating surfaces,
so that the greater the pressure of the feet upon the clanks, the greater is the
crushing strain sometimes sufficient to break the balls. Now the pimcipal object
of my invention is to prevent the balls from becoming jammed, thus lessening the
usual gunding of the balls and bearing surfaces and to accomplish this object [
so construct the beaung, that the power applied in diving acts duect upon the
balls thereby obviating the crushing and grinding strain, and enabling the balls to
roll fieely whether under pressure or not; the bearings are also so arranged as to
be applicable for cycles generally, but more particularly for safety bicycles.
My improvements consist of a simple arrangement of cone bearing collais
applicable to either "hubs" or crank brackets," the spindles not requiring to be
SCI owed, but fitted with bearing collars forming beating sun faces for the balls
My invention will be readily understood by reference to the annexed sheet of
drawings wherein.
Fig. 1s a view of a cycle "hub" diawn half in section and half in elevation,
showing my improved arrangement of bearings applied thereto.
Fig. 2 is a view of a safety bicycle "crank bracket" drawn half in section and
half in elevation, also showing my improved arrangement of beaungs applied
thoreto.
"
Fig. 3 is a half section of a safety bicycle crank bracket showing an
alternative and slightly different arrangement of the same bearings.
Referring to Fig. 1
A is the hub of wheel having cup ends screwed internally as shown; the
chain wheel a is screwed on the outside of one end of said hub
Inside each cup
end of said hub 1 insert a bearing cone which is "brazed" or other wise secured
to each said cup end.
Bis the spindle having a collar e with flat bearing surface for balls d at the
chain wheel end, and a collar e' with V shaped groove for bearings for balls d' at
opposite end. When the spindle B and balls and are placed in position [
Bcrew a bearing cone e uto each cup end of hub A thus etaming the balls
in position; the said bearing cones being secured by lock nuts f.

page_text: It will thus be seen that three bearing surfaces, are formed for the balls at the
chain wheel end of hub A while four bearing surfaces are formed for the balls at
opposite end of said hub.
The four bearing surfaces on one side being necessary to prevent the spindle
from shifting.
The flat surface on collar c allows for accmate adjustment of the balls by means
of the screwed bearing cones e.
By this arrangement, the balls are enabled to roll freely and with less crushing
strain than heretofore, and the said balls and spindle can be readily removed and
replaced as may be desired.
Refering to Fig. 2:
C is the "crank bracket" into each end of which I insert a bearing collar g
which is "brazed " or otherwise secured to said bracket, such collar being screwed
internally.
B' is the spindle having a collar with flat bearing surface for the balls at
chain wheel end, and a collar with V shaped groove for the bearing for balls
at the opposite end.
When the spindle B and the balls and are placed in position, I screw a
bearing cone into each of the collars g within the crank bracket thus retaining
the said balls in position. Thus the bearing surfaces at each end of bracket are
practically the same as shown in Fig. 1.
Referring to Fig. 3:
Cis the crank bracket having a collar or flange at each side, forming a
shoulder against which 1 braze or otherwise secure a bearing cone which answers
the same pin pose as the bearing collar g shown in Fig 2.
B is the spindle which is constructed as described for Figs. 1 and 2.
The balls in this case are retained in position by the bearing-cones m which are
screwed into each end of the crank bracket C' as shown.
In each case the bearings for balls are of hardened steel.
It will be seen that the spindles in each case do not require screwing.
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 18 :—
In cycles.
(1) The "hub" bearings being formed by the beating cones b, the bearing
cones e and the collars c and c' ou spindle B substantially as herein described and
illustrated in Fig. I in the annexed drawings.
C
the
(2.) The crank bracket bearings being formed by the bearing collars
bearing cones and the collars and on spindle B' substantially as herein
described and illustrated in Fig 2 in the annexed drawings.
(3.) The crank bracket bearings being formed by the bearing cones / aud in
and the collars on spindle B², as an alternative arrangement, substantially as berein
described and illustrated in Fig. 3 in the annexed drawings.
Dated th.. 19th 1
N
D 1004