An Improved Driving Gear for Velocipedes and other Machines.
Year: 1893

page_text: Date of Application, 12th June, 1893
Complete Specification Left, 9th Mar., 1894-Accepted, 14th Apr., 1894
PROVISIONAL SPECIFICATION.
An Improved Driving Gear for Velocipedes and other Machines.
LUKE WARNER Junr. Whins of Milton Stirling, Wood Turner, and LUKE
WARNER Senior Whins of Milton Wood Turner, do hereby declare the nature of
this invention to be as follows:-
The object of this invention, is to increase the lever power of bicycles, tricycles,.
and other crank driven machinery.
:
This is secured by means of the lever (a), the shorter end of the lever, being a
segment of a toothed wheel, carrying five teeth, which gears with another wheel (b)..
This wheel has ten teeth, six of them being cut away. It is attached to a short axle
on the other end of which is fixed a toothed wheel (c). This wheel gears with
another wheel (d), this wheel being fixed on the bicycle wheel hub (e).
The return motion is caused by the pin (f) lifting the excentric (g), within which
it revolves.
.
(H) shown in plan is the fork end a bracket in which the bearings, ball or
otherwise work, being brazed to it.
(I) is the crank, or thin disc of metal, which carries the excentric pin (G).
The pinion lever (A), is nineteen inches long, from bearing to pedal. This lever,
may be shortened, or lengthened, by altering the size of pinion, with which it gears.
This end of pinion lever, is not shown in the drawing. The drawing shows one side-
of fork only, but both are alike.
:.
Fig. 1 side view.
COMPLETE SPECIFICATION.
'An Improved Driving Gear for Velocipedes and other Machines.
We, LUKE WARNER, Junior, Wood Turner, and LUKE WARNER, Senior,
Wood Turner, Whins of Milton in the County of Stirling, 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 for its object to increase the lever power of cycles and other
crank driven machines by dispensing with the foot pedal rotary driven cranks and
connecting endless chain or other gearing, and substituting therefore a new or
improved construction or arrangement and combination of lever mechanism actuated
by the oscillatory foot tread motion of the rider. By these improvements a
maximum leverage driving power and speed will be obtained, and be particularly
suitable for hill climbing, and for ladies use.

page_text: And in order that our said invention and the manner of performing or carrying
the same, into effect or practice may be properly understood, we have hereunto
appended an explanatory sheet of drawings in which
Figure 1 represents a side elevation of a bicycle, as fitted with our improved
mechanism; and
Figures 2 and 3 are a detached side elevation, broken away, and a corresponding
plan respectively to an enlarged scale of our improved lever mechanism.
Referring to these drawings:-According to the arrangement shown of our
improvements we fulcrum a duplex set of levers A each on a projecting pin A'
secured in bearing blocks in the fork frame A' on each side of the rear wheel W of
bicycle. The one end of each lever A is formed with a foot tread pedal at A3, and
the other end of this lever has formed on it a segment with spur teeth at A³, and
this segment gears with a segmental toothed pinion B secured on a stud spindle B
carried in bearings in the frame of cycle. A spur wheel C is mounted on this
spindle B', and gears with a spur pinion D mounted on the hub E of bicycle rear
wheel: A disc I is mounted on the spindle B' and carries an eccentric pin F which
rotates with the disc, and works within the slotted face or surface of an arm G
formed on or secured to the lever A.
By this improved arrangement of mechanism the motion communicated to each
lever A by the depression of the foot tread pedals A2 alternately on opposite sides
of the wheel W is transmitted through the toothed segment A³ and segmental
toothed pinion B to the stud spindle B₁, and thence the motion is transmitted and
the speed increased through the spur wheel C, and pinion D to the hub E of the
bicycle wheel W.
The return or upward motion of the tread A² and continuous
motion of the lever A is obtained by the crank or eccentric pin F moving within
the slotted race of arm G to operate lever A.
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 construction or arrangement and combination of the parts of driving
gear mechanism for cycles and like driven machines, substantially as herein
described in reference to and shown in the accompanying drawings.
Second. In cycles and like driven machines, the combination and use of oscillatory
or reciprocatory foot tread levers, with an eccentric acting pin or crank transmitting
a return or continuous motion to their geared end, and with a train of speed
increasing toothed gearing between said levers and the hub of wheel, substantially
as herein described in reference to and shown in the accompanying drawings.
Dated the 6th March 1894.
W. R. M. THOMSON, & Co.,
96, Buchanan Street, Glasgow, Agents.