Improvements in Detachable and Combined Chain Wheels and Cranks
Year: 1895

page_text: Date of Application, 6th May, 1895
Complete Specification Left 12th D c 1895-Arcepted 18th Jan, 1896
PROVISIONAL SPECIFI ALION
Improvements in Detachable and Combined Chain Wheels
and Cranks
I, ROBERT FREDFRICK HALL, Managing Director of the Cycle Components
Manufacturing Company Limited of "Ferndale,' Church Road, Moseley, near
the City of Birmingham, do hereby declare the nature of this invention to be as
follows
-
My invention relates to a combined and detachable chain wheel and crank for
cycles, and has for its object, a simple and ready means of attaching or detaching
the crank to or from the chain wheel on the latter requiring to be moved from the
axle
In carrying out my invention, I take a hubless chain wheel, having a middle
piercing for taking upon a plain or set forward collar centrically projecting from
the front face of a thin disc boss or ocular flange coming upon the outer side of
the bossed eye at the axle end of the clank
This circular flange or disc boss has upon its outside face, three or other number
of stepped studs, the shanks or circuli paits of which take into corresponding
circular holes in the arms of the chain wheel
The protruding and stepped ends of the studs are struck from the same radius as
the inside of a screwed nut or inside screwed ring, which takes and screws upon the
said outstanding and stepped parts of the studs, which are screwed or threaded
upon their curved parts Thus, the face of the boss of the crank has a series of
three or other number of stepped studs, with the curved parts of their outer edges
screwed The unwormed parts take into corresponding holes in the chain wheel,
whilst the screwed parts, which project through the said holes in the chain wheel
to the outer side, receive the inside-screwed locking or securing ring or nut upon
that side
A cross cotter secures the chain wheel and crank to the axle
As a modified form of my improvements, I dispense with the use of the inside
Sciewed ring or nut, and simply make plain circular studs on the face of the boss
of the crank take into corresponding holes of the chain wheel, the wheel and crank
being kept together by the cross pin or cotter securing the crank to its
axle end
It is understood that the chain wheel abuts against a shoulder or an equivalent
on the axle
Dated then 1th der of Max 1895

page_text: Improvements in
COMPLETE SPECIFICATION
Detachable and Combined Chain Wheels
and Cranks
I, ROBERT FREDFRICK II AT L, Managing Director of the Cycle Components
Manufacturing Company Limited of "Ferndale," Church Road, Moseley, neai
the City of Birmingham, 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
-
My invention elites to a combined and detachable chain wheel and crank for
cycles, and has for its object, a simple and ready means of attaching and detaching
the crank to and from the chain wheel on the latter requiring to be moved from
the axle
In carrying out my invention, I take a chain wheel, having a middle piercing
which may take upon a plain or set forward collar centrically projecting from the
front face of a thin disc, boss or circular flange coming upon the outer side of the
bossed eye at the axle end of the crank
This circular flange or disc boss has upon its outside face, three or other number
of stepped studs, the shanks or circular paits of which take into corresponding
circular holes in the arms of the chain wheel
The protruding and stepped ends of the studs are curved to the same radius as
the inside of a screwed nut or inside screwed ring, which takes and screws upon
the said outstanding and stepped parts of the studs, which are screwed or threaded
upon the outer curves of the stepped parts Thus, the face of the boss of
the crank has a series of three or other number of stepped studs, with the
curved parts of their outer edges screwed The unwormed parts take into
corresponding holes in the chain wheel, whilst the screw parts, which project
through the said holes in the chun wheel to the outer side, receive the inside-
screwed locking or securing ing or nut upon that side
A cross cotter secures the chain wheel and crank to the axle
It is understood that the chain wheel abuts against a shoulder or an equivalent
on the axle
Figure 1 of the accompanying drawing represents a perspective view of the
component parts of my improved detachable and combined chain wheel and crank
separated
Figure 2 is an elevation of the inner side of the said combined article when the
parts are put together
Figure 3 is a complete vertical section of Figure 2 upon the dotted line
Figure 4 is a side elevation of the crank separately
Figure 1 a vertical section of the chun wheel separately
Figure 6 is a section of the inside screwed locking ring separately
Figure 7 is a front elevation of the crank
Figure 8 is an elevation of the inner side of the chain wheel and Figure 9 an
elevation of the locking ring
The same letters of reference indicate corresponding parts in the several figures
of the drawing
The chain wheel a, has a toothed periphery a', and a plain middle part a²,
supported by aims a³, and having a central hole a', wherethrough the spindle or
axle b, passes
a is a boss formed on the inner side of the wheel and provided
with stepped holes or piercings as, at the junction of the said boss with the
arms That is, one half a', of each hole is made through an arm and the other
half as, is formed in the boss or thickened part
The head c¹, of the crank c, has collar c², with a spindle hole c³, through
its middle, and carrying circular studs e, upon its face, of the exact size of the

page_text: holes a, in the chain wheel
These studs have semi-circular ends c, with the
outwardly presented edges c, which are wormed, coming in nearly the same
circular path as but standing a little beyond the periphery or edge a³, of the
boss a²
dis a locking ring wormed upon its inner periphery at d¹ and of a diameter
suitable for taking upon the combined wormed parts of the studs
The crank has a cottar hole or key way c', through which a cottar c³, passes and
enters a cut away part 6, in the spindle
Figure 10 represents a vertical section of a modified form of my invention, in
which an extended collar carried by the crank takes through a hole in the middle
of the chain wheel
a is the chain wheel, the spindle, c the crank with an extension or collar c³, of
it taking through the middle a', of the said wheel, and with an inside screwed
ring d, taking upon the screwed parts of the studs c
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
-
First In detachable and combined chain wheels and cranks, securing and
locking the crank to the wheel by studs or stepped studs on the face of the crank
taking through corresponding holes in the chain wheel, and with the outsides of
the said studs wormed to receive a locking ring or equivalent, substantially as
described and set forth
Secordly In detachable and combined chain wheels and cranks, connecting
the crank to the wheel by stepped studs on the face of the said crank taking into
corresponding holes in the said wheel, and with the said studs having wormed sides
curved to a radius struck from the centre of the axle and upon which screwed parts
an inside screwed locking ring or equivalent takes, substantially as and for the
purpose described and set forth
Thirdly The improvements in detachable and combined cranks and chain
wheels, and the general construction, arrangement and combination of the parts of
the same, substantially as described and set forth
Noted the 11th day of December 1895
ROBERT FREDERICK HALL,
By Henry Skerrett,
24 Temple Row, Birmingham, Agent for Applicant