Improvements in Velocipedes.
Year: 1894

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PROVISIONAL SPECIFICATION:
Improvements in Velocipedes.
I, JOHN BARRATT of Lever Street, Wolverhampton in the County of Stafford,
Cycle Maker; do hereby declare the nature of the said invention to be as
follows:-
This invention has for its object improvements in velocipedes and other road
vehicles whereby the chain wheel can be readily removed when it is desired to apply
a new wheel or one having a different number of teeth.
In carrying my invention into effect I form the chain wheel with a boss or hub
having a groove (or grooves) cut through it for the reception of two or more lugs or
projections secured to the crank,
These lugs are drilled to take small bolts which screw into corresponding holes
formed in the chain wheel.
The crank is formed with a sleeve as usual which passes through the eye of the
chainwheel and is there secured by a nut or other suitable means.
It will thus be seen that when the lugs or projections on the crank are fitted
into the groove or grooves cut in the hub or boss of the chain wheel and the bolts
screwed home the chain. wheel and crank are practically one, and at the same time
the wheel is easily detached when desired.
Dated this 4th day of: October 1894.
Improvements in Velooipedes.
I, JOHN BARRATT of Lever Street Wolverhampton in the County of Stafford
Cycle Maker do hereby declare the nature of the said 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 has for its object improvements in velocipedes and other road
vehicles having a chain-wheel driven by a crank whereby the chain-wheel can be
readily removed when it is desired to apply a new wheel or one having a different
number of teeth.
In carrying my invention into effect I form the chain-wheel with a boss or hub
having a groove (or grooves) cut in the face thereof for the reception of two
or more lugs or projections secured to the crank. These lugs are drilled to take
bolts or set-screws which screw into corresponding holes in the chain-wheel.
In order that the invention may be clearly understood reference is had to the
annexed drawing, in which,
Figure 1 is a side clevation of a chain-wheel and crank for a velocipede
whereby the chain-wheel is rendered detachable according to my invention.
Figure 2 is a vertical section of the same.
Figures 3 & 4 are elevations at right angles of the crank detached.
a is the chain-wheel and b the groove cut in the face of the boss c thereof. d is
the crank and ee the lugs or projections connected thereto (two of which are

page_text: shewn) which engage with the said groove as shewn clearly in Figures 1 and 2.
ffare the bolts or set-screws whereby the said lugs or projections are secured to
the chain-wheel a.
By this construction it will be seen that the chain-wheel a can be readily
removed if required by first removing the bolts or screws ff so as to release the
crank band another similarly constructed wheel of the same or a different size
substituted.
Although I have shewn two lugs upon the crank d I may in some cases employ
more than two, in which case additional corresponding grooves are formed in the
'chain-wheel.
The lugs ee may be formed integral with the crank or separately as in the
drawing. In the latter case they are formed with a cylindrical projection 9
adapted to enter the eye of the crank and be secured thereon in auy, suitable
manner a boleh being formed in the said projection for the reception of the crank
.axle.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, 1 declare that what
I claim is,
"
1. In a velocipede having a chain-wheel driven by a crank, providing the
chain-wheel with a groove or grooves and the. crank with lugs or projections
adapted to engage with the said groove or grooves and be secured therein
substantially as and for the purpose hereinbefore described:
2. The improved chain-wheel and crank for a velocipede hereinbefore described
and illustrated in the accompanying drawing.
Dated this 6th day of July 1895:
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JOHN BARRATT.