Year: 1898

page_text: I, JOHN TAYLOR, of the Firm of Taylor, Gue and Company, Limited, of Hampton
Works, Peel Street, in the City of Birmingham, Manufacturers, do hereby
declare the nature of this invention to be as follows:-
My invention has for its object the provision of simple and effective means for
the ready adjustment of a cycle driving chain to the required degree of tension
without impairing or disturbing the alignment of the driving wheel axle, and to
permit of the ready attachment and detachment of the driving wheel together
with the axle on which it is mounted whilst effectually preventing accidental
detachment.
In the application of my invention I form in each of the back or rear fork
castings a circular recess for the reception of a disc which is pivotted upon a
central pin or stud projecting from the casting. The discs or circular plates,
which can be turned or revolved freely in the circular grooves upon their
respective pivot pins, have each an aperture formed through them for the reception
of the axle ends, and also a slot admitting an ordinary clamping screw or stud.
On slightly turning or revolving the discs the chain wheel (which with the
road wheel is mounted upon the axle in the ordinary manner) can be brought
nearer to or removed from the chain wheel on the crank axle, and thus the
chain can be readily adjusted to the required degree of tension.
The discs are secured at any point within the range of adjustment by simply
tightening up the ordinary clamping screws or studs hereinbefore referred to.
To permit of the ready attachment and detachment of the driving wheel together
with the axle on which it is mounted, I form an inclined mouth of entrance
at the front end of each of the horizontal slots or gaps provided in the rear fork
castings for carrying the axle. Through such inclined mouths or entrances the
axle, with the wheel mounted thereon, can be readily inserted or withdrawn, but
when the axle ends are within the horizontal slots accidental detachment is
prevented by the closed rear ends and the inclined entrances at the front end.
Dated thin 97th
1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements relating to Chain Driven Cycles.
I, JOHN TAYLOR, of the Firm of Taylor, Gue & Company, Limited, of Hampton
Works, Peel Street, in the City of Birmingham, Manufacturers, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:—
My invention has for its object the provision of simple and effective means for
the ready adjustment of a cycle driving chain to the required degree of tension
without impairing or disturbing the parallel alignment of the driving wheel axle,
and to permit of the ready attachment and detachment of the driving wheel
together with the axle on which it is mounted whilst effectually preventing
accidental detachment.
In the accompanying sheet of explanatory drawings to be hereinafter referred to.
Figure 1 is a side elevation, and Figure 2 a sectional end elevation (through
the line ab Figure 1), representing one of my rear fork attachments for a cycle
frame fitted with the rotatable chain adjustment disc.
Figure 3 is a side elevation of the attachment with the disc removed.
Figure 4 represents a modified form of the rear fork attachments, and Figure 5
a rotatable disc suitable for such an attachment.
The same reference letters in the different views indicate the same parts.
In the application of my invention I form in each of the back or rear fork
castings or attachments as A, a circular recess for the reception of a disc as B
which is pirotted upon a central pin or a plain stud as a projecting from the attach-
ment A. The discs or circular plates, which can be turned or revolved freely
in the circular grooves upon their respective pivot pins, have each an aperture
formed through them for the reception of the axle ends as C, and also a slot
admitting an ordinary clamping screw or stud D which screws into a tapped hole a²
in the casting or attachment A.
On slightly turning or revolving the discs, the chain wheel (which with the
road wheel is mounted upon the axle in the ordinary manner) can be brought
nearer to or removed from the chain wheel on the crank axle, and thus the chain
can be readily adjusted to the required degree of tension.
The discs are secured at any point within the range of adjustment by simply
tightening the screws or studs as D.
To permit of the ready attachment and detachment of the driving wheel
together with the axle on which it is mounted, I form a mouth or gap as a³ at
one end of each of the slots or gaps at provided in the rear fork castings or
attachments for carrying the axle. Through such mouths or gaps the axle, with
the wheel mounted thereon, can be readily inserted or withdrawn, after with-
drawal of the adjustment discs as B, but when the axle ends are within the slots
as a and the discs in position, accidental detachment of the axle is effectually
prevented.
In the modification shown at Figures 4 and 5 I make a horizontal slot or gap
as in the casting or attachment A1, instead of a circular slot as a¹ (Figure 3),
and form a vertical elongated or oval aperture as 61, instead of an ordinary round
or circular aperture, in the disc B, for the reception of the axle. With this
modification the axle will be maintained at the same vertical height above the
ground level throughout the entire range of its horizontal adjustment.

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:-
-
In chain driven cycles, the improved means whereby the chain can be readily
adjusted to the required degree of tension with the maintenance of the parallel
alignment of the driving wheel axle, and the said axle with the driving wheel
be readily attached to or detached from the cycle frame when required but
effectually prevented from accidental detachment, substantially as described and
as illustrated.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and 25, Cross Street, Manchester,
Agents for the Applicant.