Improvements in or relating to Detachable Connections for Cranks, Chain Wheels, and other Parts of Cycles.
Year: 1896

page_text: Date of Application, 27th Feb., 1895
Complete Specification Left, 27th Nov., 1896-Accepted, 30th Jan., 1897
PROVISIONAL SPECIFICATION.
Improvements in or relating to Detachable Connections for Cranks,
Chain Wheels, and other Parts of Cycles.
I, MARTIN DIEDERICH RUCKER, Managing Director of Humber & Company,
Limited, 32 Holborn Viaduct, City of London do hereby declare the nature of this
invention to be as follows:-
This invention relates to detachable connections for various parts of cycles
particularly the crank and chain-wheel, the chain-wheel and hub, and the chain-wheel
and axle, the principle being the same in all cases though the application may be
made to different parts and to different forms of cycles.
As a connection between the crank and chain-wheel of a safety bicycle I make the
boss or projection at the back of the crank into a tapered or conical form accurately
fitting into a similar recess in the boss or centre of the chain-wheel. The boss of the
erank is extended through the chain-wheel and slightly beyond it and this portion is
screwed to receive a thin locking ring or nut so that when the locking ring is screwed
up the wheel and crank are firmly connected together. To ensure that the chain-
wheel turns with the crank a feather, screw or equivalent may be inserted partly in
the crank or its boss, and partly in the chain-wheel. The chain wheel being thus
secured upon the crank itself both crank and wheel may be secured to the axle by a
cottar passing through the crank in the usual manner.
In applying the invention to the hub of the back wheel of a safety bicycle or the
like for connecting the chain-wheel to the hub, the hub itself is conel to fit into the
chain-wheel the end of the hub being screwed to receive the locking ring and
the feather or equivalent applied as before.
In applying this invention to an axle such as is used in tricycles an enlarged cone
is formed upon the axle to receive the chain wheel a back collar or ring being left if
desired at the larger end of the cone; this would serve to prevent the feather from
coming out, and clearance may be left between it and the chain-wheel to allow for
the draft upon the cone or the collar may be of smaller diameter than the largest
dianeter of the cone. In this ns in all cases more than one feather or equivalent
fastening may be used.
Dated this 25th day of February 1896.
BOULT & WADE,
Agents for the Applicant.
Improvements in or relating to Detachable Connections for Cranks,
Chain Wheels, and other Parts of Cycles.
I, MARTIN DIEDERICH RUCKER, Managing Director of Humber & Company,
Limited, 32, Holborn Viaduct, City of London, 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 detachable connections for various parts of cycles
Price d

page_text: particularly the crank and chain-wheel, the chain-wheel and hub, and the chain-wheel
and axlo the principle being the same in all cases though the application may be made
to different parts and to different forms of eveles.
As a connection between the crank and chain-wheel of a safety bicycle I make the
boss or projection at the hack of the crank into a tapered or conical form accurately
fitting into a similar recess in the boss or centre of the chain-wheel. The boss of the
crank is extended through the chain-wheel and slightly beyond it and this portion is
scrowed to receive a thin locking ring or nut so that when the locking ring is screwed
up the wheel and crank are firmly connected together. To ensure that the chain-
wheel turns with the crank a feather, screw, or equivalent may be inserted partly in
the crank or its boss, and partly in the chain-wheel. The chain-wheel being thus
secured upon the crank itself both crank and wheel may bo secured to the axle by a
cortar passing through the crank in the usual manner.
In applying the invention to the hub of the lack wheel of a safety bicycle or the
like for connecting the chain-wlcul to the hub, the hub itself is conel to fit into the
chain-wheel the end of the hub being screwed to receive the locking ring and
the feather or equivalent applied as before.
In applying this invention to an axle such as is used in tricycles an enlarged cone
is formed upon the axle to receive the chain-wheel a hack collar or ring being left if
desired at the larger end of the cone; this would serve to prevent the feather from
coming out and clearance may be left between it and the chain-wheel to allow for the
draft upon the cone or the collar may be of smaller diameter than the largest diameter
of the cone. In this as in all cases more than one feather or equivalent fastening
may be used.
In the accompanying drawings.
Fig. 1, is a section showing the application of my invention for the connection of
the crank and chain-wheel of a bicycle.
Fig. 2, is a section showing the method of connecting tho chain-wheul to the hub
of a bicycle.
Fig. 3, is a section showing the method of attaching a cbnin-wheel to an axle such
ns is used in tricycles.
Like letters indicate like paris throughout the drawings.
The crank A has a tapered or conical boss B formad on it this boas hoing formed
on the inner side or back of the crank.
The chain-wheel C has a similarly tapered or conical rocess formed in its centre into
which the boss B on the crank accurately fits. A portion of this boss on the crank is
either extended so as to project slightly through the chain-witeel, or the centre of the
chain-wheel is cut away to allow the end of the boss B to extend beyond the centre of
thu chain-wheel being still kept flush with the face of the wheel as a whole as shown
in Fig. 1. This extelud portion 13 of the boss has a screw-thread cut upon it for
the reception of a thin locking ring or nut D. By means of this nut the conical
boss B may be drawn tightly into the conical centre of the chain-whoul. By cutting
away the centre of the chain-wheel as above described and illustrated in Fig. 1, the
nut D is counter-sunk in the face of the wheel.
A feather E is inserted partly into the tapered hoss of the crank and partly into
the chain-wheel to ensure that the chain-wheel turns with the crank. Both crank
and chain-wheel being thus secured together may be attached to the axle by a cottar
passing through the key-way A' in tho usual manner.
As shown in Fig. 2. the hub F of the back wheel of the machino is coned as at B
the centre of the chain-wheel C being correspondingly shaped.
A screwed portion 13 is provided fer the reception of the nut D a feather being
inserted as in the previous case. To prevent this feather working out, a back collar
or ring is formed on the larger end of the cone.
To attach a chain-wheel to the axle of a tricycle a similar arrangement is employed
as shown in Fig. 3, the cone B, screwed portion B and the collar F being formed
on the axlo F, the centre of the chain-wheel being coned, feather E inserted and
nut D being employed as in the previously described cases.

page_text: 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 :-
1. A conical detachable connection for the cranks chain-wheels or other parts of
cycles substantially as described.
2. In a detachable connection for the crank and chain-wheel of a cycle the
combination with a coned and screw-threaded boss upon the crank of a conically
recessed chain wheel a nut and a feather substantially as described and illustrated in
the accompanying drawings.
3. In a detachable connection for the chain-wheel and the hub or axle of a cycle
the combination with a collar and a coned and screwed boss formed upon the hub
or axle of a conically-recessed chain-wheel a nut and a feather substantially as
described and illustrated in the accompanying drawings.
4. The detachable connection for the cranks chain wheels or other parts of
cycles substantially as described and illustrated in Figure 1 or Figure 2 or Figure 3
of the accompanying drawings.
Dated this 26th day of November 1896
M. D. RUCKER.
Boult & Wade,
Agents for the Applicant.