An Automatic Chain Gear Brake.
Year: 1898

page_text: An Automatic Chain Gear Brake.
I, WALTER ALEXANDER SCOTT, of 31, Moray Place, in the City of Dunedin, in
the Colony of New Zealand, do hereby declare the nature of this invention to
be as follows: :―
The object of this invention is to utilize the well known movement in any
belt or chain or the like when used for driving where the return part is slack
when the machine is being driven forward, but tightens on any brake power
being applied (such for instance as back pedalling in the case of a bicycle) when
the belt or chain rises.
This rising movement is taken advantage of to apply a brake to the wheel
and any description of brake may be adopted.
Referring to the accompanying drawing:
A, is any wheel belt or chain driven, A¹, are spokes.
B, any convenient part of the frame for fixing to.
C, is the driving gear shown as slack or forward driving.
D, is any brake shown as a lever pressing against the rim the part pressing
may be a roller to avoid injuring the rim, or any clasp brake.
D¹ is the part of brake in contact, and D, is a slot adjustment for the
wheel roller E. E¹, rim to suit the chain.
F, is any clip support for the appliance and F1, (dotted) the fulcrum. G, and H,
are means of keeping the brake in normal position; or D¹, clear of A.
Though shown for a bicycle any belt driven machine is acted on in similar
manner. Any materials or sizes may be adopted.
I, WALTER ALEXANDER SCOTT, of 31, Moray Place, in the City of Dunedin, in
the Colony of New Zealand, a Bicycle 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 to utilize the well known movement in the return
part of any belt which takes place when that belt is being driven forward or back-
ward or in other words when that part that was the slack or return portion becomes
the tight or driving portion.
In case of the belt or chain being in or near a horizontal position the movement
FD 071

page_text: is up and down, (such for instance as alternately back pedalling and driving
forward a bicycle driven by the usual chain.)
This rising movement is taken advantage of to apply any form or description
of brake to the crank shaft, hub, rim or tyre and any description of levers or
the like may be used to transmit such motion to the brake.
Referring to the provisional drawing--where the brake is shown as applied
to a bicycle rim by a lever brake.
A, is any wheel driven by any belt or chain, and A¹, are any spokes if used.
B, is any convenient part of a frame to fix on to.
C, C, is part of the belt or chain shown as slack as in forward driving.
D, is any form of brake shown as a lever brake and as to press against the rim
of the wheel, when the chain rises the part so pressing may be a roller or rollers
when required to avoid injuring the rim, as might be the case if the rubbing
part D, were solid.
D2 is an adjustment slot for adjusting the roller wheel E, this may be a plain
or a chain wheel, if plain it may have a wearing rim E¹.
F, is any fulcrum clipped to a part of the frame, the fulcrum being shown
at F1, (dotted.)
G, is any spring and H, any stop as a convenient means of bringing the whole
to the normal position, or D¹, clear of A. Though shown as being applied to a
bicycle, any belt driven machine may be acted on in a similar manner, and any
suitable materials or sizes may be adopted.
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:-
1. In any belt or chain driven wheel especially where the belt or chain is about
horizontal, the combination of any wheel (such as A, A¹) and such belt or chain
(such as C, C,) with a brake and lever for working same on the rising or falling
of C, C, (such as D, D', E, E, F, F, G, H,) all substantially as and for the purposes
herein described and explained and as illustrated in the accompanying drawing.
Dated this 23rd day of February 1899
W. A. SCOTT.
Robert E. Phillips,
70, Chancery Lane, London, W.O., Agent for Applicant.