Improvements in Connecting Cranks to the Driving Axles of Cycles.
Year: 1896

page_text: Date of Application, 16th May, 1896
Complete Specification Left, 15th Feb., 1897--Accepted, 15th May, 1897
PROVISIONAL SPECIFICATION.
Improvements in Connecting Cranks to the Driving Axles of
Cycles.
I, JOHN GIBSON, of Finsthwaite, Newby Bridge, Ulverston, in the County of
Lancaster, Bobbin Turner, do hereby declare the nature of this invention to be as
follows:-
My invention consists in improvements in the mode of connecting the cranks to
the driving axles of cycles.
In carrying my improvements into effect I fix a double armed lever or bracket on
each end of the driving or crank axle and connect each crank to both extremities of
its double armed lever, instead of connecting the cranks directly to the driving axle
as hitherto customary.
Dated thin 15th do 1000
H. B. BARLOW & GILLETT,
Agents for Applicant.
Improvements in Connecting Cranks to the Driving Axles of
Cycles.
JOHN GIBSON Finsthwaite, Newby Bridge near Ulverston Bobbin Turner, 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:-
"
The invention consists of "lever cranks" for the driving axle of cycles. The
lever is beam shaped, 6 inches long, measured from the centre of the hole at each end.
It is 1 inch wide in the middle, the thickness being 1 ins. to form the "boss." The
"boss" is 1 ins. long with a finch hole in the centre, for driving axle. The thickness
of the "lever" is reduced to ins. from the "boss" to each end. The "boss" on
"lever" is the same shape as the ordinary crank, slightly projecting towards
"bearing" of axle. The width of the "lever "narrows and leaves sufficient area for
a fin. circular hole at each end for connecting the "crank." The "crank" is
"Y" shaped, the tail forming the "neck," and the sides forming two arms"
sufficiently wide to embrace the "lever." The arms are ins. in thickness & ins.
wide, leaving sufficient width at the ends of the arms for a 1 ins. hole, and are
connected to the extreme ends of the "lever" with 16 in. rivets. The neck of the
"crank" isins. thick with sufficient width to allow for a 1 in. hole to receive the
"pedal pin." The "lever" cranks are connected to the cycle axle in the ordinary
way. There is a in. pin, flat on one side and tapered slightly. It passes through
a in. hole in the side of the "lever," on a flat bed on the axle. The "crank"&
"lever," when connected gives a stroke of 6 ins. & forms the shape of a triangle.

page_text: I also claim the right to make the "lever cranks" without "joints," to the same
specifications, for which I enclose drawings. "Steel" for construction is used.
The invention consists of a lever-crank for connected to the driving axle of cycles.
The lever "A, A" is beam shaped, 6 inches long, measured from the centre of the
holes a¹ & a at each end respectively, the said holes being " diameter. The distance
across the centre of the lever is 1" and the thickness of the lever in the middle is "
A boss "B" 1" is made in the centre of the lever "A, A." A hole is bored in the
boss," in diameter, for insertion of the driving axle. The thickness of the
lever "A, A" on either side of the boss "B" is ". The boss "B" is the same shape
as the ordinary crank, and projects towards the bearing of cycle axle. The width of
the lever "A, A" narrows from the boss "B" towards each end but leaves sufficient
space at each end for a fe" circular hole to receive the rivets which connect the
arms d¹ and d of the crank "C" to the lever "A, A." The crank is Y shaped, the
tale "e" forming the neck and the arms d', d, the sides.
The arms d', d of the crank "C" are " thick and 1" wide, leaving sufficient
width at the ends to make a "hole. The neck "e" of the crank "C" is 8" thick
with sufficient space to allow for a hole "f" which receives the pedal pin. The
lever cranks are connected to the axle of the cycle in the ordinary way. There is
a "hole through the side of the boss "B" into which is inserted a pin to secure
the lever crank "AA" to the driving axle of the cycle. The crank "C" and the
lever "AA" when connected give a stroke of 64. Figs. 1 and 2 show the lever "AA"
and crank C. connected, while Figs. 3 & 4 show the lever crank without joints and
made to the same specifications as those of Figs. 1 & 2. Steel is used in the
construction of the lever crank. The drawings which accompany the Specification
are full-size copies of the lever crank.
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. That my invention of the "lever crank" is a piece of mechanism, made of steel,
and having the form of a triangle. It is connected at the base to the driving axle
of cycles, and to the pedal pin at the apex.