Improvements in Driving Mechanism for Cycles and other Wheeled Vehicles.
Year: 1897

page_text: Date of Application, 4th Oct., 1897-Accepted, 12th Mar., 1898
COMPLETE SPECIFICATION.
Improvements in Driving Mechanism for Cycles and other Wheeled
Vehicles.
PRINGLE GRAILAM, Twisting Machine Tender, 26, Stanley Street, Galashiels, and
ROBERT BORTHWICK, Publican, 2, Stirling Place, Galashiels, 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:-
(c) To the crank shaft or spindle (marked A, on the drawing signed with refer-
ence hereto) at or about the centre of the cycle or other wheeled vehicle,--which
are hereinafter briefly referred to as the "Machine," there is attached a wheel
(marked B.) round the outer edge or rim of which are teeth (marked C.) pitched
and angled. This wheel revolving directly over and at right angles with a wheel
(marked D.) round the outer edge or rim of which is a widely dispersed screw or
worm (marked E.) into which the teeth (marked C.) of the wheel (marked B.) work
causing it to revolve. This latter wheel is attached to a shaft or spindle
(marked F.) which is carried in a case or tube (marked M.) backwards horizontally
and parallel with the machine to at or near the centre of the driving wheel
(marked G.) At this the back end of the said shaft or spindle (marked F.) and fixed
to it there is a similar wheel (marked H.) round the outer edge or rim of which
is a widely dispersed screw or worm (marked 1.) This latter wheel (marked H.)
revolving directly under and at right angles with a wheel (marked J.) round the
outer edge or rim of which are teeth (marked K.) pitched and angled into which
works the screw or worm (inarked I.) of the wheel (marked H.) on the end of the
said shaft (marked F.) causing the said wheel (marked J.) to revolve. This latter
wheel (marked J.) is fixed to the shaft (marked L.) of the driving wheel
(marked G.) of the machine causing it to revolve in a forward direction and con-
sequently carrying the machine with it.
Notwithstanding anything contained in the foregoing Specification and descrip-
tion, the wheel (marked B.) on the crank shaft and that (marked J.) on the shaft
of the driving wheel may be varied in thickness or diameter; the pitch, or angle,
or number of the teeth (marked C.) on the wheel (marked B.), and those (marked E.)
on the wheel (marked J.) may be varied; the pitch or angle of the screw or worm
(marked E.) on the wheel (marked D.) and that (marked I.) on the wheel
(marked H.) may be varied; the shaft or spindle (marked F.) may be varied in
length or thickness, or it may be made hollow or solid; and the position of the
wheels (marked D. and H.) relatively with the wheels (marked A. and L.) may be
varied, all such variations depending upon the character, in respect of speed, or
weight, or otherwise, of the respective machines to be so driven.
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 a novelty in the method of propelling or driving cycles or other wheeled

page_text: vehicles, in respect of the adoption and use of an angled and pitched teeth wheel
working into a worm or screw wheel, and vice versa.
Dated this First day of October, Eighteen hundred and ninety seven.
PRINGLE GRAHAM.
ROBERT BORTHWICK.