Improvements in Securing Cycle Cranks to Axles.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Securing Cycle Cranks to Axles.
I, FREDERICK WILLIAM BRIGGS, of 6 Matlock Villas, Chesterton Road, Sparkbrook,
near the City of Birmingham, Cycle Engineer, do hereby declare the nature of this
invention to be as follows:-
This invention relates to a method of securing cycle cranks to their axles and
consists in passing a taper screw-ended pin through the head of the crank in line with
the arm, so that the pin, which has a plain shank, passes through a vertical hole in
the crank head and through a hole in the axle, thus crossing the eye in the longer
direction of the arm, and with the screwed end taking into a screwed hole running
some distance down the said crank arm. Thus the hole which runs down the part of
the arm adjacent to the eye is coincident with the hole in the crown of the
head.
The head of the pin is preferably shaped alike unto a flat square, hexagonal or
other nut, and when the pin is screwed full home, takes an abutment against the
crown of the crank head.
The whole of the parts are case hardened.
By securing cranks to axles according to my invention the attachment expeditiously
and efficiently effected.
Dated this 31st day of October 1896.
I, FREDERICK WILLIAM BRIGGS of 6 Matlock Villas, Chesterton Road, Sparkbrook
near the City of Birmingham, Cycle 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 has relation to an improved means of securing cycle cranks to their
axles, or otherwise their axles or, spindles to their cranks, and consists in passing a
taper or like screw-ended pin through the head of the crank in line with the arm, so
that the pin, which has a plain shank, passes through a hole in the crown of the
crank head and through a like coincident hole in the axle. This screw pin crosses
the eye in the longer direction of the arm, and with the screwed end taking into a
screwed hole running some distance down the said arm of the crank. Thus, the hole
[Price 8d 1

page_text: which runs down that part of the arın of the crank adjacent to the eye, is lignable
and coincident with the hole in the crown of the head.
The head of the pin is made flat, square, hexagonal in shape, and when screwed full
home, takes an abutment against the crown of the head of crank.
The whole of the parts are case hardened.
By my invention cranks are expeditiously and efficiently secured to their axles or
to spindles carried by them.
Figure 1 represents in front elevation a crank secured to an axle according to my
invention.
Figure 2 is a side elevation of Figure 1 and
Figure 3 is a part section view of the same.
Figure 4 represents in section and in elevation, the component parts of Figure 1
separated.
Figure 5 shows my invention applied to the connecting of a pedal spindle to a
crank end.
In Figures 1 to 4, a is the head of the crank attached to inner end of the stem a¹,
and having an unscrewed eye a², for receiving the axle b, having through it a plain
taper hole b, coming coincident with a like hole a³, of the crown at, of the head a.
Passing through the coincident holes a³ and b', is a headed and taper shank pin c, with
its outer and screwed end c', taking into a screwed hole a³, directed down the middle of
and in the longer direction of the stem.
In Figure 5, is the outer end of the crank, with a taper screw pin c, alike unto
that as described, made to secure the spindle 6 by taking through coincident holes a³,
and b¹, and its screwed end c¹, taking into a screwed hole a'.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare that what I claim is :-
First Securing cranks to their axles or spindles, by a taper shank screw pin,
passing through the head, eye or end, in the direction of the shank, substantially as
described and set forth.
Secondly-The improvements in the method of securing cranks to their axles or
spindles, substantially as described and set forth.
Dated this 26th day of twov 1907