Improvements in the Crank Axle Bearings of Velocipedes.
Year: 1893

page_text: Date of Application, 7th June, 1893
Complete Specification Left, 6th Mar., 1894-Accepted, 5th May, 1894
PROVISIONAL SPECIFICATION.
Improvements in the Crank Axle Bearings of Velocipedes.
I, FRED OLDFIELD, of 13, Queen Victoria Road, Coventry, in the County of
Warwick, Machinist do hereby declare the nature of this invention to be as
follows:-
This invention relates to Improvements in the Crank Axle Bearings of Velocipedes
& has for its object, a novel construction of parts for the purpose of rigidity & easy
running while under pressure.
For this purpose & as shewn in the accompanying drawing the barrel A, is
screwed at each end, to receive discs E, & adjustable discs D. The axle B has on
one end a fixed double cone C & is screwed at the other end to receive adjustable
cone G. The fixed cone C & the adjustable cone G are formed with two ball races
on each, the discs D & E are internally coned to form a ball race corresponding
with cones C & G. The tube F which fits on the collars of discs E is for the
purpose of preventing the discs E being screwed too far into the barrel A. The
discs E are first screwed into barrel A with distance piece F in between; the
axle B with cones C fixed & G adjustable are then put in with balls & form
the bearings 1 & 2, the bearings 3 & 4 are formed by putting in balls & screwing
the adjustable discs D up to them.
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To secure the discs E & D when they are adjusted, the barrel A is split at each
end & screwed tightly together & the adjustable cone G is secured with a locknut
& washer.
Dated this 6th day of June 1893.
FRED OLDFIELD.
COMPLETE SPECIFICATION.
Improvements in the Crank Axle Bearings of Velocipedes.
FRED. OLDFIELD of 36 Lancaster Street, Birmingham, formerly of 13, Queen
Victoria Road, Coventry, Foreman, 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 Improvements in the Crank Axle Bearings of Velocipedes
and has for its object a novel construction of parts for the purpose of rigidity and
easy running while under pressure, for this purpose as shewn in the drawing
accompanying the Provisional Specification, the barrel A is screwed at each end to
receive discs E, and adjustable discs D, the axle B has on one end a fixed double.
cone C, and is screwed at the other end to receive adjustable cone G.
The fixed cone C, and the adjustable cone G are formed with two ball races on
each.
The discs D, and E, are internally coned to form a ball race corresponding with
cones C, and G.
The tube F, which fits on the collars of discs E, is for the purpose of preventing
the discs E, being screwed too far into barrel A.
Discs E are first screwed into barrel A with distance piece F, in between the
axle B, with cones C fixed, and G, adjustable are then put in with the balls and
form the bearings 1, and 2, the bearings 3 and 4 are formed by putting in balls and
screwing the adjustable discs D, up to them.
0

page_text: To secure the discs E and D when they are adjusted, the barrel A, is split, at
each end and screwed tightly together and the adjustable cone G is screwed with
a locknut and washer.
It will be seen from the position of the discs D and E that the balls will be in a
perfect state of lubrication, through these discs forming a receptacle or well for
the oil.
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,
The invention of a rigid and easy running bottom bracket or crank axle bearing
by having a double row of balls, at each end of the bracket or crank axle. I also
claim the advantage of the oil retaining capacity of the well formed by means of
the discs in my bottom bracket or crank axle substantially as herein before
described.
Dand shin 5th dow of March 1901
FRED OLDFIELD,
Patentee