Year: 1896

page_text: I, CHARLES RILEY GARRARD, of Magneto Works, 107 Ryland Street, in the
City of Birmingham, Engineer, do hereby declare the nature of this invention to
be as follows:-
This Invention consists of improvements relating to cycles or velocipedes, my
object being to so construct the cranks of such machines as to obtain great strength
and stiffness with little weight, and to connect the same with the chain wheel and
with the axle in such a manner that the weight of those parts can be considerably
reduced.
In carrying, my invention into effect I construct the crank of a hollow or
U a section preferably by forging or stamping processes, providing a
solid portion at each end with a suitable eye or aperture for the reception
of the axle and the pedal pin respectively. The open side of the U
is then closed by brazing a plate or strip of sheet steel across the same, thus form-
ing a completely tubular crank or crank arm.
The crank for the driving side of the cycle I provide with two, three or more
arms, each of tubular construction as herein before described, which serves for
carrying the rim of the chain wheel, thus dispensing with the entire central portion
of the chain wheel as usually constructed.
I soinetimes secure the crank to the axle by a cotter and nut in the ordinary
manner, but I preferably fasten it to a flange formed on the axle end, a correspond-
ing flange being formed for the purpose on the inner side of the crank, the two
flanges being then suitably bolted or connected together. The axle being thus
relieved of the pressure produced by the cotter fastening, I am enabled to make it
hollow or partially hollow as may be desired.
I adapt my invention to the construction and combination of cranks, chain
wheels, and axles for cycles or velocipedes of varying designs, making such
modifications as may be necessary to meet any particular requirement.

page_text: I, CHARLES RILEY GARRARD, of Magneto Works, 107 Ryland Street, in the
City of Birmingham, Engineer, 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 consists of improvements relating to cycles or velocipedes, my
object being to so construct the cranks of such machines as to obtain great strength
and stiffness with little weight, and to connect the same with the chain wheel and
with the axle in such a manner that the weight of those parts can be considerably
reduced.
In the two accompanying shects of explanatory drawings to be hereinafter
referred to.
Figure 1 on sheet 1 is a front elevation, and Figure 2 a sectional side or end
elevation of a cycle crank constructed in accordance with my invention.
On sheet 2, Figures 3 and 4 illustrate my improved crank as constructed for the
driving side of a cycle, whilst Figure 5 is a separate view of the closing or cover
plate or strip, Figure 6 an end view of one of the arms, and Figure 7 a plan of the
arm cover plate.
The same reference letters in the different views indicate the same parts.
In carrying my invention into effect I construct the crank of a hollow or U sec-
tion, preferably by forging or stamping processes, providing a solid portion as
A and B at each end with a suitable eye or aperture for the reception of the axle
and the pedal pin respectively. The open side of the U is then closed by brazing,
soldering or otherwise uniting a plate or strip as C of sheet steel across the same,
thus forming a completely tubular crank or crank arm.
The crank for the driving side of the cycle I provide with two, three or more
arms, as D, each of tubular construction as herein before described, which serve for
carrying the rim of the chain wheel, thus dispensing with the entire central
portion of the chain wheel as usually constructed.
The crank illustrated on sheet 2, is provided with two such tubular arms, each
fitted with a cover plate as C. The chain wheel or rim is bolted or secured to the
ends of such arms, & is also further secured by a stud entering the tapped or
screwed hole c in the cover plate C³.
I sometimes secure the crank to the axle by a cotter and nut in the ordinary
manner but I preferably fasten it to a flange formed on the axle end, a corres-
ponding flange as E being formed for the purpose on the inner side of the crank
às illustrated on Sheet 1. The axle being thus relieved of the pressure produced
by the cotter fastening. I am enabled to make it hollow or partially hollow as
may be desired.
I adapt my invention to the construction and combination of cranks, chain
wheels, and axles for cycles or velocipedes of varying designs, making such modi-
fications as may be necessary to meet any particular requirement.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:-
1. The construction of tubular cranks for cycles or velocipedes substantially
as and for the purposes described..
2. A crank for a cycle or velocipede stamped or forged to a hollow or U section

page_text: and having its open side closed by a cover plate, substantially as described and as
illustrated.
3. The combination of a cycle crank with arms serving for the attachment of
the chain wheel or rim, substantially as described and as illustrated.
4. The combination of a cycle crank with a flange on its inner side serving for
attachment to a corresponding flange on the adjacent end of the crank axle,
substantially as described and as illustrated.
T 99-1 of T... 190
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents.