Improvements in and relating to Means for Adjusting the Tension of Cycle Chains.
Year: 1897

page_text: Date of Application, 7th Apr., 1897
Complete Specification Left, 6th Jan., 1898-Accepted, 26th Feb., 1898
PROVISIONAL SPECIFICATION.
Improvements in and relating to Means for Adjusting the Tension
of Cycle Chains.
ERNEST WATCHORN, of Manor House, Wilford, Nottingham, Mechanic, and
HARRY BALDWICK, of 13, Addington Road, Nottingham, Vinegar Manufacturer, do
hereby declare the nature of this invention to be as follows:-
The object of this invention is the provision of simple and inexpensive means for
enabling the tension of cycle driving chains to be adjusted without the liability of.
throwing the back wheel out of alignment with the front wheel as may be done with
the usual draw bolt arrangement.
According to this invention the axle of the back wheel is fitted to slide in slots in
the ends of the back stays, and each end of the axle is fitted with a link which is
pivottedly connected to a second link which is itself pivotted on the back stay.
This arrangement may be applied to cycles fitted with the usual slotted ends in
the back stays, and the chain is adjusted by loosening the nuts on the back wheel
axle and moving the back wheel by hand, or by screws, the link arrangement ensuring
both ends of the axle moving equally.
W. H. POTTER, Wh. Sc.,
Brougham Chambers, Nottingham.
Improvements in and relating to Means for Adjusting the Tension
of Cycle Chains.
ERNEST WATCHORN, of Manor House, Wilford, Nottingham, Mechanic, and
HARRY BALDWICK, of 13, Addington Road, Nottingham, Vinegar 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 this invention is the provision of simple and efficient means for
enabling the tension of cycle driving chains to be adjusted without the liability of the
back wheel being thrown out of alignment with the front wheel, as may be done with
the usual draw bolt arrangement.
According to this invention the axle of the back wheel is fitted to slide in slots in
the backstays and each end of the axle is fitted with a lever which is pivottedly
connected to a second lever or link which is itself pivotted on the back stay.
In the drawings which accompany this Specification
Fig. 1 is an elevation of the improved chain adjustment, and
Fig. 2 is a plan of the same.

page_text: The wheel hub a is fitted with ball bearings and cones b in the usual way, the cones
by preference being fitted to slide in the forked ends c of the back stays d to which
the back legs are attached by any of the ordinary methods. The end of the wheel
axle e is fitted with a short lever f which turns with the axle and is jointed to a
link 9 which is fitted to turn on a fixed axle h. Both ends of the axle are similarly
fitted with a lever and link so that any movement given to the lever on one side of
the machine is communicated by the axle to the lever at the other side of the machine
and the axle is thereby always moved parallel to itself, and the alignment of the back
wheel is always maintained. The levers and links may be arranged above or below
the movable axle and may be applied to any machine in which the axle to be moved
is fitted to slide in slots..
The tension of the chain is adjusted by raising or lowering the lever g at either
side of the machine, or by turning the axle.
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
1. The combination of an axle fitted at both ends with levers which can turn with
the axle and are jointed to links capable of turning on fixed pins, constructed,
arranged and operating substantially as herein shown and described and for the
purpose specified.
Dated this 5th day of January 1800