Improvements in and relating to the Securing of Cranks and the like to Axles or. Spindles.
Year: 1893

page_text: Date of Application, 14th Apr., 1893
Complete Specification Left, 12th Jan., 1894-Accepted, 17th Feb.,
1894
PROVISIONAL SPECIFICATION.
Improvements in and relating to the Securing of Cranks and the
like to Axles or. Spindles.
We, THE NEW HOWE MACHINE COMPANY, LIMITED, of Bridgeton,
Glasgow, Lanarkshire, and ALFRED MACDONALD, Manager to said Company, do
hereby declare the nature of our invention to be as follows:-
This invention has reference to and comprises a new mode and means of securing
cranks and the like to axles or spindles, whereby an increased purchase or gripping
power will be obtained, and the cranks be readily attached or detached from the
axles.
Under one arrangement as applied to cycles for connecting the driving cranks to
the axles the improvements consist in forming the boss head of the crank on its
one side with a groove or channel so as to have a projecting flange or rib on
opposite sides of the eye boss hole in which the end of the axle is inserted. The
axle would be formed with "flats" or parts cut away on opposite sides behind the
end journal which fits the eye part of crank boss, so that these recessed parts shall
fit within and bear on the side projecting flange webs of crank, and enable a great
purchase power of crank to be obtained on axle. Or alternatively the flats on
axle may be formed of a square shape to fit a correspondingly shaped recess or
channel in the boss of crank. A projection on the boss of head of crank would
have a split recess through it from eye of boss, and the split side would have a
screwed hole or eye formed through it, tapped on its one part, and a screw pin
would be inserted into hole to draw the two jaws together and thus firmly secure
the crank head to the axle. While by unscrewing the pin the crank can be readily
detached from axle.
Dated 13th April 1893
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in and relating to the Securing of Cranks and the
like to Axles or Spindles.
We, THE NEW HOWE MACHINE COMPANY, LIMITED, of Bridgeton,
Glasgow, Lanarkshire, and ALFRED MACDONALD, Manager to said Company,
do hereby declare the nature of our invention, and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement in writing, that is to say:-
This invention has reference to and comprises a new mode and means of securing
cranks and the like to axles or spindles, whereby an increased purchase or gripping
power will be obtained, and the cranks be readily attached or detached from the
axles.
an
And in order that our said invention and the manner of performing or carrying
the same into practice may be properly understood, we have hereunto appended
explanatory sheet of drawings, in which Figure 1 is a side elevation of a crank-
head as formed in accordance with one arrangement of our improvements. Figure 2
is a sectional view at right angles to Figure 1, and showing an axle as secured
within the crank head in accordance with our improvements. While Figures 3 and 4
C

page_text: are detached end and longitudinal side views of the axle. Figure 5 is a sectional
view corresponding to Figure 2 showing another arrangement of our improvements,
and Figures 6 and 7 show detached views at right angles to each other of the
crank-head. While Figures 8 and 9 are longitudinal views at right angles to each
other, and Figure 10 an end view corresponding to these showing detached the
axle used in the arrangement shown in Figure 5.
Referring to these drawings:-Under one arrangement, as shown in Figures 1 to 4,
suitable for being applied to cycles for connecting the driving cranks to the axles,
the improvements consist in forming the boss head A¹ of the crank A on its one
side with a groove or channel a so as to have a projecting flange or rib ala² on
opposite sides of the eye boss hole in which the end of the axle is inserted. The
axle B would be formed with "flats" or parts, 62, cut away on opposite sides
behind the end journal which fits the eye part of crank boss, so that these recessed
parts 6, 6 shall fit within and bear on the side projecting flange webs a², a², of the
crank, and enable a great purchase power of crank A to be obtained on axle B.
Or by an alternative arrangement, as shown in Figures 5 to 10 the "flats" 61, 62 on
axle B may be formed of a square shape, to fit a correspondingly shaped recess or
channel a with side projecting flanges or cheeks a', a², in the head A³ of crank A.
A projection A³, Figures 1 & 6, on the boss head A' of crank A would have a
split recess C through it from eye of boss, and the split side would have a screwed
hole or eye formed through it, tapped on its one part, and a screw pin C¹ would be
inserted into hole to draw the two jaws A2, A2, together and thus firmly secure the
crank head A' to the axle B. While by unscrewing the pin C' the crank head A
can be readily detached from axle B.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
First. The securing of cranks and the like to axles or spindles by forming a
groove or channel a with flanges or ribs a¹ a² in the bosshead of crank for
"flats" b b on the axle to enter and grip on, substantially as and in the manner
herein described in reference to and shown in Figures 1 to 4 of the accompanying
drawings.
Second. The securing of cranks and the like to axles or spindles by forming a
groove or channel a with flanges or side cheeks a' a' on the head of crank, for
"flats" 61 62 on the axle to enter and grip on, substantially as and in the manner
herein described in reference to and shown in Figures 5 to 10 of the accompanying
drawings.
Dated the 9th January 1894.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.