Improvements in or connected with Bottom Brackets for Velocipedes.
Year: 1898

page_text: Date of Application, 5th Feb., 1898-Accepted, 20th May, 1898
COMPLETE SPECIFICATION.
Improvements in or connected with Bottom Brackets for Velocipedes.
We, FRANCIS WILLIAM ROBERT SCOTT, of 393, Oldham Road, Newton Heath,
Manchester, and SAMUEL PENNINGTON, of 35, Marsden Street, Newton Heath,
Manchester, Gentlemen, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to improvements in the arrangement and construction of
a detachable and interchangeable bottom bracket for velocipedes, the object being
to provide simple and efficient means whereby the bottom bracket of a velocipede
may be quickly, easily and securely attached to the cycle frame.
By our improved arrangement of the bottom bracket, it can be quickly
detached for adjusting, cleaning, or oiling the bearing, or for repairs, while it
may be secured in position to the frame of the velocipede in such a manner that
the driving chain wheel is on either the right or left hand side as required, and
by this means the twisting and bending of the frame is prevented as the strain
upon the said frame consequent upon the driving of the machine can be arranged
to take place upon either side alternately.
In the case of the bottom bracket being damaged or becoming worn out, when
a new one is required, our improved arrangement and method of securing the
bottom bracket to the frame possesses great advantages over the method now
employed, for whereas by the present method of construction it becomes necessary
to unbraze the tubes, which is a very difficult process and often resulting in
serious damage being done to the frame, by our arrangement the bottom bracket
can be at once detached and replaced by a new one as required.
According to our invention, the barrel of the bottom bracket with bearing parts,
is formed separately from the rest of the machine, while to that part of the frame
to which the bottom bracket is usually brazed we now braze a base or shell fixing
furnished with a projecting flange upon either side, while the barrel of the bottom
bracket is furnished with corresponding flanges so as to allow of the parts being
readily bolted together, and by this means the bottom bracket is firmly secured
to the machine in such a manner as to allow of its being readily removed and
again secured in position or replaced by a new one, for the purposes herein before
stated.
In order that our invention may be more fully understood, we will now proceed
to describe same with reference to the accompanying drawings in which,
Fig. 1 is an end elevation of the base or shell fixing and the barrel of the bottom
bracket secured in position.
Fig. 2 is a plan of Fig. 1.
Fig. 3 is a longitudinal section of the barrel of the bottom bracket detached.
Fig. 4 is a partly sectional plan of the barrel of the bottom bracket, and
Fig. 5 is an end elevation of the basis or shell fixing and the barrel of the
bottom bracket detached.
In carrying our invention into practical effect, we provide a base or shell
fixing a furnished with the necessary lugs 6 to receive the usual tubes of the

page_text: velocipede frame, said lugs being connected for additional strength by brace
pieces c, while it is furnished upon each side with a projecting flange d bored to
receive the connecting bolts e.
The barrel of the bottom bracket is mainly of the ordinary construction
containing the usual ball bearings, and furnished upon each side with a projecting
flange d, each flange being furnished with a sufficient number of holes or perfora-
tions h to allow of its being bolted to the flanges d of the base or shell fixing a.
Three bolts e are preferably employed as shown in Fig. 2, and where this number
is used the flanges of the barrel of the bottom bracket f are furnished with
three holes or perforations h upon each side to allow of the said part being secured
to the base or shell fixing a'in either a right or left handed position.
Each flange is furnished with a stop piece g to prevent the forward or back-
ward movement of the parts.
In order to secure the barrel f of the hottom bracket in position, it is first placed
within the base or shell fixing a, when the flanges d, d, and d; d, are in close
contact. They are then firmly secured together by the small bolts e which are
preferably of steel, said bolts being furnished with lock nuts or split pins to prevent
the nuts of the bolts becoming loosened by the vibration of the machine.
.).
"1
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
No. 1. A detachable bottom bracket for velocipedes and the method of and means
for securing same in position, comprising essentially the base or shell fixing a
furnished with flanges d, d, in combination with the barrel or bearing part f
furnished with corresponding flanges di, substantially as herein described and
shown with reference to the accompanying drawings.
No. 2. In a method of and means for securing a detachable bottom bracket to
a velocipede frame, the employment of a base or shell fixing such as a rigidly
secured to the velocipede frame substantially as set forth.
No. 3. A detachable and interchangeable bottom bracket for velocipedes,
arranged and constructed, substantially. as herein described and shown, and for
the purposes specified.
Dated 1. 3
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