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

page_text: Date of Application, 24th May, 1899
Complete Specification Left, 22nd Feb., 1900-Accepted, 31st Mar., 1900
PROVISIONAL SPECIFICATION.
Improvements in Bottom Brackets or Crank Axle Bearings of
Velocipedes.
We, WILLIAM Bown, of Overdale Villas, Sutton Street, Aston juxta Birming-
ham, in the County of Warwick, Works Manager, and WILLIAM BOWN.
LIMITED, 308, Summer Lane, Birmingham aforesaid, Manufacturers, do hereby
declare the nature of our invention and to be as follows:
66
Our invention has for its object improvements in bottom brackets or crank
axle bearings of velocipedes and which has reference to what are commonly
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 drill and tap one or more holes
partly in the ends of the outer shell or body of the bracket and partly in the
ends of the "solid centre or bearing case- -that is to say, half the hole or holes
are formed in the ends of the bracket body and the other half in the ends of the
solid centre or bearing case. When the solid centre" is fitted in position
in the interior of the outer shell a small screw is then screwed into each hole
so that the two parts are firmly and securely held together.
"
دو
"3
In some cases instead of drilling holes in the ends of the outer shell and "solid
centre we may screw each end of the outer shell or body of the bracket to
receive a cap the inner surfaces of which bear or bind against the ends of the
"solid centre" thus firmly holding it in position in the interior of the outer
shell.
Data: 00d dose of 1200
Improvements in Bottom Brackets or Crank Axle Bearings of
Velocipedes.
We, WILLIAM BOWN, Overdale Villas, Sutton Street, Aston juxta Birming-
ham, 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
Price 811

page_text: performed to be particularly described and ascertained in and by the following
statement:
-
"3
Our invention has for its object improvements in bottom brackets or crank
axle bearings of velocipedes and which has reference to what are commonly
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 drill and tap one or more
holes partly in the ends of the outer shell or bracket and partly in the ends
of the "solid centre" or bearing case-that is to say half the hole or holes
are formed in the ends of the bracket body and the other half in the ends of the
"solid centre" or bearing case. When the solid centre is fitted in position
in the interior of the outer shell a small screw is then screwed into each hole
so that the two parts are firmly and securely held together.
33
In some cases instead of drilling holes in the ends of the outer shell and solid
centre we may screw each end of the outer shell or body of the bracket to
receive a cap the inner surfaces of which bear or bind against the ends of the
"solid centre" thus firmly holding it in position in the interior of the outer
shell.
'
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.
Figure 1 is a back view shewing a "bottom bracket" or crank axle bearing
complete made according to our invention.
Figure 2 is an end view of Figure 1.
Figure 3 is a part sectional view of Figure 1.
Figure 4 is an end view of the shell or bracket B in which the
or bearing case is fixed.
..
Figure 5 is a view of the solid centre" or bearing case.
Figure 6 is an end view of Figure 5.
"
solid centre "
Figure 7 is a back view shewing a modified form of our "bottom bracket or
crank axle bearing.
Figure 8 is a part sectional view of Figure 7.
In carrying our invention into practice we drill and tap one or more holes say
four partly in the ends 61 of the bracket or outer shell B and partly in the
ends a' of the "solid centre" or bearing case A-that is to say-the halves 62 of the
holes are formed in the ends b₁ of the bracket body or shell B and the other
halves a2 in the ends a¹ of the solid centre' or bearing case A as clearly shewn
at Figures 4 and 5. When the "solid centre" or bearing case A in which the
crank axle X mounted on ball bearings in the usual manner revolves is fitted
into position in the interior of the outer shell or bracket B the screws s are then
screwed into the holes in the ends of the "solid centre and bracket so that the
two parts are securely held or fixed together as clearly shewn at Figures 1, 2
and 3. Enlargements may be formed on the outer shell or bracket where the
holes are formed to receive the screws if desired. The caps D for excluding
dust and other foreign matter are then screwed into the ends of the 'solid
centre A these ends being tapped for that purpose as shewn at Figure 3. By
this means it will be seen that the "solid centre" or bearing case A is firmly
and rigidly held in position in the bracket or outer shell B and may when
required be easily and quickly removed.
وو
At Figures 7 and 8 we have shewn another method of fixing or securing the
" solid centre" A in the outer shell or bracket B. In this case we cut a screw thread
on the ends of the bracket or outer shell B to receive the caps E and the
ends a¹ of the "solid centre" or bearing case A are made to slightly protrude
beyond the ends 61 of the bracket so that when the caps E are screwed onto the
ends of the bracket the inner ends or surface of these caps bear or bind against
the ends of the solid centre thereby firmly holding it in position in the
"
وو

page_text: bracket or outer shell as clearly shewn at Figure 8. The caps E also act as
dust caps for preventing foreign matter from entering the bearings.
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 outer shell B by one or more screws fitting into holes formed partly
in the ends of the outer shell or bracket and partly in the ends of the solid
centre" or bearing case in the manner and for the purpose substantially as
herein set forth and as shewn upon the drawings.
Second-In solid centre" bottom brackets drilling and tapping one or more
holes partly in the ends of the outer shell B and partly in the ends of the
solid centre A to receive the screws such as s in the manner and for the pur-
pose substantially as herein set forth and as shewn upon the drawings.
"
Third-In solid centre" bottom brackets securing the "solid centre" A in
the interior of the bracket or outer shell B by the caps such as E the ends of
the said outer shell being tapped to receive the said caps in the manner sub-
stantially as herein set forth and as shewn by Figures 7 and 8.
Teted this 21st day of Fohruary 1900
WILLIAM BOWN and
WILLIAM BOWN LIMITED.
By George Barker,
Fellow of the Chartered Institute of Patent Agents,
Agent for Applicants,
77, Colmore Row, Birmingham.