Improvements in "Bottom Brackets" or Crank Axle Bearings of Velocipedes.
Year: 1899

page_text: Date of Application, 23rd Jan., 1899
Complete Specification Left, 12th Oct., 1899-Accepted, 18th Nov., 1899
PROVISIONAL SPECIFICATION.
Improvements in "Bottom Brackets" or Crank Axle Bearings of
Velocipedes.
We, WILLIAM BOWN, Overdale Villas, Sutton Street, Aston-juxta-Birmingham,
in the County of Warwick, Works Manager, and WILLIAM BOWN LIMITED,
308, Summer Lane, Birmingham aforesaid, Manufacturers, do hereby declare
the nature of our said invention to be as follows:-
-
Our invention has for its object improvements in "bottom brackets" or crank
axle bearings of velocipedes and has reference to what are generally known as
solid centre bottom brackets" by which we are enabled to easily and quickly
remove the "solid centre" from or fit it into the shell or bracket portion.
"
«
In carrying our invention into practice we form on one of the ends of the
bearing case or "solid centre" one or more lugs or projections which fit into
corresponding recesses or slots formed in one of the outer edges of the shell or
bracket portion. We then cut or form a screw thread on the opposite end of the
bearing case or solid centre" onto which a cap or cover screws. When the
"solid centre" or bearing is fitted into position in the shell or bracket the lug
or lugs or projections on the one end of the "solid centre" fits into the recess
or recesses in the end of the bracket and the screwthreaded end of the "solid
centre protrudes slightly through the opposite end of the bracket. The cap
or cover is then screwed tightly onto this end of the "solid centre butting
against the end of the bracket by which means the "solid centre is firmly
held in position in the bracket.
T
""
1
01
"
WILLIAM BOWN,
WILLIAM BOWN LIMITED,
By George Barker,
-Fellow of the Chartered Institute of Patent Agents.
Agent for Applicants, 77, Colmore Row, Birmingham.
".
Improvements in Bottom Brackets" or Crank Axle Bearings of
Velocipedes.
We, WILLIAM Bown, Overdale Villas, Sutton Street,-Aston-juxta-Birmingham,
in the -County of Warwick, Works Manager, and WILLIAM BOWN LIMITED,
308, Summer Lane, Birmingham aforesaid, Manufacturers, do hereby declare
the nature of our said invention and in what manner the same is to be per-
Price 8d.]

page_text: formed, to be particularly described and ascertained in and by the following
statement:-
Our invention has for its object improvements in "bottom brackets" or crank
axle, bearings of velocipedes and has reference to what are generally known as
"solid centre bottom brackets" by which we are enabled to easily and quickly
remove the "solid centre" from or fix it into the shell or bracket portion.
In carrying our invention into practice we form on one of the ends of the
bearing case or solid centre" one or more lugs or projections which fit into
corresponding recesses or slots formed in one of the outer edges of the shell or
bracket portion. We then cut or form a screw thread on the opposite end of the
bearing case or "solid centre" onto which a cap or cover screws. When the
solid centre or bearing is fitted into position in the shell or bracket the lug
or lugs or projections on the one end of the solid centre" fits into the recess
66
or recesses in the end of the bracket and the screw threaded end of the solid
centre"
protrudes slightly through the opposite end of the bracket. The cap
or cover is then screwed tightly onto this end of the "solid centre" butting
against the end of the bracket by which means the "solid centre" is firmly
held in position in the bracket.
In order that our invention may be more clearly understood and easily carried
into practical effect we have appended hereunto a double sized sheet of drawings
upon which we have illustrated examples of our "bottom bracket" or crank
axle bearing.
66
29
Figure 1 is a view of our "bottom bracket" or crank axle bearing complete.
Figure 2 is a view of the shell or bracket B in which the solid centre 18
fixed.
Figure 3 is an end view of Figure 2.
Figure 4 is a view of the solid centre or bearing case A.
Figure 5 is a right hand end view of Figure 4.
Figure 6 is an edge view of the cap or cover D which screws onto one end
of the "solid centre."
Figure 7 is a right hand end view of Figure 6.
Figure 8 is an edge view of the cap or cover F which screws into the opposite
end of the "solid centre."
Figure 9 is a right hand end view of Figure 8.
"
In carrying our invention into practice we form on one of the ends of the
bearing case or solid centre A one or more lugs or projections a¹ preferably
two as shewn at Figures 4 and 5 and on the edge of one of the ends of the shell
or bracket portion B we cut or form corresponding slots or recesses as clearly
shewn at Figures 2 and 3 into which the lugs a¹ take when the solid centre
is fitted in position in the bracket B as shewn at Figure 1. On the opposite
end a¹ of the "solid centre" A the screw thread a preferably left hand is cut
or formed to receive the cap or cover D. When the solid centre in which the
crank axle E mounted on ball bearings in the usual manner revolves is fitted
into the shell or bracket B the lugs a take into the recesses or slots in the
bracket and the screw threaded end a projects slightly beyond the opposite end
of the bracket. The cap or cover D is then screwed firmly onto this end of the
"solid centre'
butting against the end of the bracket by which means the
"solid centre is firmly held in position in the bracket. The cap or cover F
which screws into that end of the "solid centre on which the lugs a' are formed
is now fixed in position as clearly shewn at Figure 1 and the "bottom bracket"
is complete. It will be evident that the solid centre A may be held in position
in the bracket B by forming or fixing a lug or lugs or projection or projections
on one end of the bracket or shell B projecting inwards so as to take into corre-
sponding slots or recesses formed in the edge of the bearing case or
66 solid
centre A instead of forming lugs on the "solid centre" taking into slots in
the bracket.
"
"

page_text: Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
CLAIMS.
First: The improvements in "bottom brackets or crank axle bearings of
velocipedes consisting essentially in securing the " solid centre" such as A in
the bracket or shell B by forming a lug or lugs such as a¹ on one end of the
solid centre and corresponding slots or recesses in the edge of the bracket B
the other end of the solid centre being screw threaded to receive a cap or cover
such as D in the manner and for the purpose substantially as herein set forth
and as shewn upon the accompanying sheet of drawings.
Second: In solid centre bottom brackets or crank axle bearings forming a
lug or lugs on one of the ends of the "solid centre" and corresponding slots
or recesses in the edge of the bracket or shell for the purpose substantially as
herein set forth and as shewn upon the accompanying sheet of drawings.
**
Third: In solid centre" bottom brackets or crank axle bearings forming
a lug or lugs on the end of the bracket or shell and corresponding slots in one
of the ends of the " solid centre" for the purpose substantially as herein set
forth.
Doted this 11th day of Octalian 1800
WILLIAM BOWN, and
WILLIAM BOWN, LIMITED,
By George Barker,
Fellow of the Chartered Institute of Patent Agents.
Agent for the Applicants, 77, Colmore Row, Birmingham.