Improvements in or connected with Pedals and Pedal Cranks for Bicycles and similar Vehicles.
Year: 1897

page_text: Date of Application, 16th Oct., 1897
Complete Specification Left, 6th Apr., 1898-Accepted, 20th May,
1898
Improvements in or connected with Pedals and Pedal Cranks for
Bicycles and similar Vehicles.
I, CHARLES ALSTROM, of 76, Great Eastern Street, in the County of London,
Cabinet Manufacturer, do hereby declare the nature of this invention to be as
follows:-
An improved method of affixing the pedals to the pedal cranks of bicycles so that
the pedals when not in use can be turned inwards without impairing their rigidity
when being used for propelling the machine and I carry this out by the following
means namely:-
The attachment of the pedal to a sleeve sliding on the pedal crank and recessed
at one or other of the rims to receive projections formed on the crank to prevent
the pedal from turning and controlled by a locking sleeve working on a screw
thread cut on the pedal crank or by other suitable appliance so that the pedal
may at pleasure rotate round the crank or be fixed in the desired position.
Dated this 16th day of October 1897.
CHARLES ALSTROM.
Improvements in or connected with Pedals and Pedal Cranks for
Bicycles and similar Vehicles.
I, CHARLES ALSTROM, of 76, Great Eastern Street, in the County of London,
Cabinet Manufacturer, 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 object of my invention is to provide a method of fixing the pedals to the
pedal cranks whereby the pedals when not in use can be turned more or less
inwards towards the wheel of the bicycle. For this purpose I provide a metal
sleeve which is capable of sliding along and rotating round the pedal crank. Into
this sleeve I screw or otherwise fix the pedal. On the sleeve are formed projections
which fit into corresponding recesses in the crank or the recesses may be on the
sleeve and the projections on the crank. When these projections are set into the
recesses and the sleeve locked in such a way (for example by one or more locking
nuts) that it cannot withdraw its projections from the recesses rotation of the
sleeve and therefore of the pedal is prevented. If for example the pedal is then in
position for driving, it is only necessary in order to bring it parallel to the wheel
when not in use to loosen the locking nut or nuts and withdraw the sleeve with its
TD 017

page_text: projections from the recesses and the pedal can then be rotated and if necessary
locked in the other position. One way in which my invention may be carried out
is shown in detail in the accompanying drawing. Figs. 1 and 2 are respectively
plan and section of the crank and sleeve showing the sleeve locked to the crank;
Figs. 3 and 4 are respectively plan and section of the same when unlocked a is the
crank, the sleeve, ce two locking nuts which can be turned on the threads, so as
to lock the sleeve and thereby keep the projections a of the sleeve in the recesses i
of the crank, g is a shoulder screwed or otherwise attached on the end of the crank
against which the sleeve abuts when the projections e are in the recesses i, f is
the socket into which the pedal is screwed or otherwise attached. It will he obvious
from the drawings that in order to rotate the pedal axle it is only necessary to loosen.
the nuts c 2 so as to enable the sleeve projections e to be withdrawn from the
recesses as shown in Figs. 3 and 4 when the sleeve can be rotated to any desired
position.
Having now described and ascertained the nature of my invention and the
manner in which the same is to be performed I declare that what I claini is:-
1. In bicycle driving cranks fixing the pedal to a sleeve capable of rotating on
the crank.
2. In bicycle driving cranks attaching the pedal to a sleeve capable of rotating
on the crank and of being locked in any desired position substantially as described.
3. A bicycle crank having a sleeve with projections fitting into recesses such
sleeve being locked in any desired position by means of nuts substantially as
descrived and illustrated in the accompanying drawings.
Dated this 6th day of April 1898.
HARPER & BATTCOCK,
23, Rood Lane, London, E.C., Agents for Applicant.