Improvements in Cycle Cranks.
Year: 1898

page_text: Improvements in Cycle Cranks.
ALFRED ARTHUR GooD, Corn Merchant, Castle Grove, The Park, Nottingham,
do hereby declare the nature of this invention to be as follows:-
This invention is intended to facilitate the downward motion of pedalling, and
consists of a crank of parabolic or angular shape. The crank could also be adjust-
able to different angles and sizes. The form of the ordinary cycle crank is altered
to one of a round or angular shape, the alteration being in the direction of the
front of the machine.
Improvements in Cycle Cranks.
I, ALFRED ARTHUR GOOD, of Castle Grove, The Park, Nottingham, in the
County of Nottingham, Corn Merchant, 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 has for its object improvements in cycle cranks by which I pro-
vide a crank which is easy adjustable to various sizes and which by altering the
direction of the strain upon the crank during the forward and downward move-
ment of the pedal is intended to facilitate the said forward and downward action.
In order that my invention may be clearly understood and more easily carried
into practise I have appended hereunto a sheet of drawings upon which I have
fully illustrated the nature of my said improvements.
Figure 1 is an elevation of a crank of circular or parabolic form with an adjust-
able joint in the centre.
Figure 2 is an enlarged side elevation of the joint B.
Figure 3 is an elevation of the crank shewn in Figure 1 but shewing the crank
adjusted to a smaller size.
Figure 4 is an elevation shewing a modification in which the crank is angular.
Figure 5 is another elevation of Figure 4 when extended in size by the adjust-
able joint B.
In carrying my invention into effect I form my crank preferably in two pieces A
and A¹ which are joined together by the joint B which is so formed as to be
capable of adjustment by which means the size from centre of bracket F to centre
of pedal E can be altered more or less as may be required this being effected by

page_text: having the connecting faces provided with corresponding teeth or friction sur-
faces 6 so that they are capable of being turned to any position or angle and at
the same time can be securely fixed together without fear of lash by means of the
connecting pin 62 and nut b. The bend or angle of the crank is towards the
front of the machine the direction of the rotation of the pedals being indicated
by arrows the shape of the crank A being so arranged that during the forward
and downward pressure of the foot the position of the strain is so disposed upon
the crank as to facilitate the said forward and downward movement.
I do not confine myself to the exact form of joint B shewn as I may vary this
without departing from the nature of my said invention and I may form the
cranks of either of the shapes shewn in one piece without the joint.
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:-
1st. The combination of a curved crank A, A¹ with an adjustable joint such
as B substantially as and for the purpose herein set forth and illustrated.
2nd. The combination of an angular crank A, A¹ in combination with an
adjustable joint such as B substantially as and for the purpose herein set forth
and illustrated.
3rd. The curved or angular shaped crank substantially as herein set forth.
Dated thin 2741
1000