Year: 1897

page_text: Date of Application, 8th June, 1897-Accepted, 14th Aug., 1897
Fig. 4 an inverted plan of one of the pedal levers drawn to a larger scale.
Similar letters of reference indicate the same parts in all the figures.
The pedal levers (a) are severally journalled at one end upon pins (b) carried upon
brackets (c) secured to the chain stays (d).
Cranks (e) are fixed upon the sprocket wheel spindle (f), and a chain (1) connects
the sprocket wheel with a pinion (2) upon the driving wheel.
The cranks (e) carry flanged rollers (g) upon crank pins (h).
The underside of each lever (a) carries a curved bracket (i) which rests upon and
forms a travelling way for one of the rollers (g) when the lever is operated.
The curve of each of the brackets (2) is proportioned so that the pedal lever
carrying it is at the top of its stroke slightly in advance of the crank (e) upon which
it operates, and so that the pedal lever does not arrive at the bottom of its stroke
until the crank (e) has passed over the bottom centre: thus power tending to
revolve the spindle (f) can be brought to bear upon the respective cranks slightly
before they arrive at their top and slightly before they pass their bottom centres.
A guard (k) following the curve of the bracket (i) (to which it is secured at one
end by a hinged joint (1), and at the other by a bolt (m), upon the lever; taking
into a hole in the guard ;) is employed to ensure smoothness in running the effect of
the guard being to form, with the bracket, a slot for the roller to run in.
For convenience in travelling the machine, when the rider has dismounted, and
for cleaning and other purposes the bolt (m) may be withdrawn and the guard

page_text: thereby released, permitting the lever to be raised clear of the roller and turned up
into engagement with a spring clip (n) secured to the top of the back stay (o).
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed, we declare that what we
claim is,
1. In cycle propelling mechanism, the combination of a sprocket pinion upon the
driving wheel of the machine driven from a sprocket wheel which has rotary motion
communicated to it by cranks upon its axle carrying rollers engaging with curved
slots in vibratory pedal levers pivoted upon the frame of the machine substantially
as specified and illustrated.
2. In combination: vibratory pedal levers (a) journalled upon pins (6) carried
upon brackets (c) secured to the chain stays (d); curved brackets (i) upon the
levers (a), rollers (9), journalled upon pins (h) of the cranks (e) secured to spindle (f)
having a sprocket driving wheel fixed upon it, communicating motion to a pinion (f²)
substantially as specified and illustrated.
3. In combination the pivoted pedal lever (a), the spindle (f) having a crank (e)
carrying a flanged roller (g) a curved bracket (i) upon the lever, and a
correspondingly curved guard (k) hinged at one end to the bracket and secured by
a bolt at the other substantially as specified and illustrated.
4. In combination a vibratory pedal lever pivoted at one end to the frame of a
cycle and a spring clip (n) secured to the frame above it, substantially as and for
the purposes herein described and illustrated.
Dated this 27th day of March 1897.