Improvements in the Construction of Ends for the Back Forks of Cycles, whereby the Chain and Driving Wheel are more Readily, more Accurately, and more Effectually Adjusted.
Year: 1890

page_text: Date of Application, 11th Oct., 1890
Complete Specification Left, 10th July, 1891-Accepted, 5th Sept., 1891
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Ends for the Back Forks of
Cycles, whereby the Chain and Driving Wheel are more Readily,
more Accurately, and more Effectually Adjusted.
RICHARD GREEN Mechanician Lion Cycle Company Broad Street Birmingham
County of Warwick do hereby declare the nature of this invention to be as
follows:-
The ends are forged stamped or shaped in iron steel or other metal in a suitable
shape to be fixed to the ends of the forks of cycles. I then cut through or machine
a slot of suitable dimensions running vertically through from its top side to its
bottom side in which I place a metal eye or washer which receives the ends of
axle of driving wheel with a screwed shank projecting from its top edge on which
is fixed a screwed nut.
Now having secured the ends above described to the fork sides & having fixed
the metal eye with its screwed shank above described to the axle of the driving
wheel then put through the vertical slot in the above fork end the screwed shank
of the eye fixing afterwards the screwed nut which is for the purpose of securing
the eyes fixed to the axle after it has been properly adjusted.
It will be seen by the above method any wear of the driving chain can be
taken up by unscrewing the screwed nut on the shank of the eyes above described
when passed through the slot in the fork ends above described without displacing
the adjustment of the cones which are fixed on the axle of the driving wheel by
moving the back or driving wheel in an opposite direction to the chain axle which
cannot be done where the slot is cut horizontally or the eye is not used.
Dated 10th day of October 1890.
RICHARD GREEN.
COMPLETE SPECIFICATION.
Improvements in the Construction of Ends for the Back Forks of
Cycles, whereby the Chain and Driving Wheel are more Readily,
more Accurately, and more Effectually Adjusted.
I, RICHARD GREEN, Lion Cycle Company, Broad Street, Birmingham, County
of Warwick, Mechanician, 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 :-
This invention relates to chain adjustment, or otherwise, wheel and chain gear
adjustment, for rendering taut the chain.
My invention relates to means, as hereinafter described, whereby the said adjust-
ment is effected in a simpler and more efficient manner than heretofore.
The said adjustments are applicable to all chain-driven velocipedes, and when in
use, adjustment of the chain is performed, independent of the adjustment of
the bearings of the axle, and that the axle bearings are adjusted, independently
of the chain adjustment.
By providing the driving gear with adjuncts or attachments for chain adjustment,
the fittings of the driven wheels, are more accurately mounted, and the said wheels
are prevented from running out of track.
Figure 1 of the accompanying drawing, represents in side elevation a safety
bicycle, provided with chain-adjustment means, constructed and arranged, according
to my invention.

page_text: Figure 2 represents upon an enlarged scale (to that of Figure 1) the wheel centre
of the driving wheel, with its framing and accessory parts, or otherwise, the driving
part of the said safety, with the back end chain adjustment. The rear extension
framing, which is slotted vertically, is shown in section, in order to exemplify how
the adjustment of the chain is affected, by the changing of the positions of bossed
eyed bracket attachments, carried at the ends of the axles of the driving wheel,
and with the erect shanks or stems of them, taking vertically through all-through
slots, and there affixed, in their proper adjusted positions by nuts,, or their
equivalents.
Figure 3 represents a top side plan of the rear part, or the rear driving wheel,
and its accessory parts, as shown at Figure 2.
Figure 4 is an end view of the said rear driving wheel, with the bossed eyed
bracket of the one side in section, and the other side, in elevation.
The same letters of reference indicate corresponding parts in the several figures
of the drawing.
a are the rear framings of the machine, with rear extensions a², directed behind
the rear upright members a³ of them. These rear extensions, which are alike unto
outstanding brackets, are longitudinally and vertically slotted with all-through
holes a, wherein the erect shanks 62, of bossed eyed brackets b, surrounding the
ends of the axles e, of the driving wheel d, take.
These said bossed eyed brackets, have stop collars, and screwed shanks,
upon which latter, screw nuts 66, take. e are interposed washers, toothed or serrated
upon their undersides, which take upon like teeth upon the face or top side, of the
rear extension framing a² as aforesaid, so that by the screwing home of the said
nuts after the adjustment of the length of the chaing, the wheel d, with its speed
chain wheel, is secured in their adjusted positions, hence, the drive chain
adjustment.
is the crank axle, the cranks, the chain wheel upon the said axle, and kare
the bearings. The brackets b, and the bearings, are kept in position upon the ends
of the axles by screw nuts l.
Thus, to adjust the drive chain, on wear, the slack is readily and expeditiously
taken up, by loosening the nuts 65, lifting the washers e, from the top faces of the
rear extension framings, and then sliding the bossed eyed brackets b, rearwardly
within the vertical slots a', of the said extension parts of the framing, and when the
chain is taut, the screwing home of the nuts, as aforesaid, firmly secures the said
parts in their adjusted positions, without disturbing the already adjusted bearings
of the back wheel, and further, the bearings of tho back wheel, admit, when
necessary of being adjusted without disturbing the said chain adjustment, which is
unattainable in chain adjustments of the ordinary kind.
The application of my chain adjustment, or back end chain adjustment, to other
velocipedes, differs in no essential respect from its application to that of a safety,
other than in the change of the positions of the parts of the framing.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
First In chain adjusting means, or driving chain adjusting means, of veloci-
pedes, connecting the axles of the driving wheels of the said velocipedes, to their
framings, or rear extensions of them, by supplementary and adjustable connection-
brackets, substantially as and for the purpose as described and set forth.
Secondly In chain adjusting means of velocipedes, consisting of supplementary
and adjustable connection-brackets, with longitudinally, and vertically slotted, rear
extension framings, substantially as described and set forth.
Thirdly-In chain adjusting means of velocipedes, consisting of, supplementary
and longitudinally adjustable, connection-brackets, taking upon the ends of the axle
of the driving wheel, of the one part, and through, and into vertical, and longi
udinally directed slots, or openings, made through the framing, or extensions of

page_text: the framing or framings, of a machine, of the other part, and which said brackets,
are locked or secured in their adjusted positions, by lock-nuts, with interposed
washers, substantially as and for the purpose as described and set forth.
Dated this 7th day of July 1891.
RICHARD GREEN.
By Henry Skerrett,
6, Livery Street, Birmingham, Agent for Applicant.