Improvements relating to Driving and Brake Mechanism for Cycles.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements relating to Driving and Brake Mechanism for Cycles.
I, CHARLES GEORGE GARRARD, of The Garrard Manufacturing Company,
Limited, Magneto Works, Ryland Street, in the City of Birmingham, Manufac-
turers, do hereby declare the nature of this invention to be as follows:-
My invention has for its object the construction and arrangement of simple
and reliable clutch driving and brake mechanism in combination with the free
wheel of a cycle.
In carrying my invention into effect I screw or otherwise secure upon an exten-
sion of the rear or driving road wheel hub, a sleeve having a flange or disc formed
with or secured to its outer end. Upon the inner end of the said sleeve I mount
freely the chain or gear wheel, interposing between the same and the sleeve suit-
able rollers in pockets or recesses having an inclined surface so that the two.
parts become wedged together under the ordinary conditions of driving, but
released when the motion of the road wheel tends to overtake that of the chain
or gear wheel.
Between the chain wheel and the aforesaid flange or disc on the outer end of
the sleeve I arrange another disc which fits loosely upon the sleeve and is pre-
vented from rotation therewith by studs or projections from a pair of ears or
lugs, the said studs or projections engaging the top and bottom sides respectively
of the adjacent chain stay tube. Between the adjacent faces of the outer disc
(which rotates with the rear or driving road wheel) and the inner and stationary
disc, I insert a washer of vulcanised fibre or other like material, and the inner
disc is provided with a laterally projecting flange covering the peripheries of both
the outer disc and the said washer.
In a lateral boss like extension from the side of the chain wheel adjacent to
the stationary or non-rotatable disc, I dispose rollers which are rotatable about
vertical or radial axes in pockets or recesses having inclined surfaces so arranged
that on the application of a back pedalling effort by the rider, the narrow ends of
the recesses advance upon the rollers which thereby exert a lateral force against
the non-rotatable disc and thus press the later against the washer and the rotat-
able disc.
.
By such means an effective brake or check action can be readily imposed upon
the road wheel, the brake being instantly released on again pedalling in the for-
ward or driving direction.

page_text: Driving and brake mechanism for Cycles.
I, CHARLES GEORGE GARRARD, of The Garrard Manufacturing Company,
Limited, Magneto Works, Ryland Street, in the City of Birmingham, Manufac-
turers, 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:-
My invention has for its object the construction and arrangement of simple
and reliable clutch driving and brake mechanism in combination with the free
wheel of a cycle.
On the accompanying sheet of explanatory drawings to be hereinafter referred
to.-
Figure 1 is an elevation showing a portion of the rear part of a bicycle having
my invention applied thereto.
Figure 2 is an elevation and Figure 3 a plan, showing, to a larger scale, the
construction and arrangement of my clutch and brake mechanism."
The same reference letters in the different views indicate the same parts.
In carrying my invention into effect I screw or otherwise secure upon an exten-
sion of the rear or driving road wheel hub A, a flanged sleeve B, and upon the
inner end of the said sleeve I mount freely the chain or gear wheel C. Between
the interior surface of the chain wheel and a disc D secured to the hub I inter-
pose the usual clutch rollers as E in pockets or recesses having an inclined sur-
face so that the two parts, C and D, become wedged together under the ordinary,
conditions of driving, but released when the motion of the road wheel tends to
overtake that of the chain or gear wheel.
Between the outer side or end of the chain wheel C and the aforesaid flanged
sleeve B, I arrange the cupped disc F which fits loosely upon the sleeve and is
normally prevented from rotation in a forward direction by the engagement of
its notched or ratchet like periphery with a pawl G, pivoted upon a bracket H
clamped to the stay tube J of the cycle frame. Between the adjacent faces of the
flange of the sleeve B (which rotates with the rear or driving road wheel) and
the inner stationary disc F, I insert a washer K of vulcanised fibre or other like
material having a high coefficient of friction.
In a lateral boss like extension from the outer side or end of the chain wheel
adjacent to the stationary or non-rotatable disc, or in a separate annular cage
as L, I dispose rollers as M which are rotatable about vertical or radial axes in
pockets or recesses having inclined surfaces so arranged that on the application
of a back pedalling effort by the rider, the narrow ends of the recesses advance
upon the rollers which thereby exert a lateral force_against the non-rotatable
disc F and thus press the latter against the washer K and the rotatable flange
or disc forming part of the sleeve B.
By such means an effective brake or check action can be readily imposed upon
the road wheel, the brake being instantly released on again pedalling in the for-
ward or driving direction, or by simply releasing the pressure.
On simply raising the pawl G by means of the line N, and finger or trigger
piece (which latter is arranged for convenient operation by the rider when in
the saddle), the free wheel is at once converted into a fixed wheel, permitting
of back pedalling without thereby applying a brake, and also allowing the
machine to be wheeled backwards without the rise and fall of the pawl G upon
the ratchet teeth.

page_text: 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:-
The combination with the free wheel of a cycle, of a clutch driving and brake
mechanism constructed and arranged substantially as described and as illustrated.
Dated this 13th day of June 1900.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, & 25, Cross Street, Manchester,
Agents for the Applicant.