Improvements in Cycles.
Year: 1891

page_text: COMPLETE SPECIFICATION.
Improvements in Cycles.
We WILLOUGHBY CRAMPTON of Westbar Green, Merchant, and CHARLES
NEIL of Bridge Street, Manufacturer, both of Sheffield in the County of York,
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 of improvements in cycles, relates particularly to the con-
struction of pins used as saddle supports, and to a method of making the pin
adjustable in its angle or inclination so far as regards the relative position of the
two arms of the said L pin-the object being to construct this appliance in as light
a form as is consistent with due strength to any angle and fixed by the rider with
facility and with absolute security and safety.
And in order that our invention may be clearly defined from others, and thus
may be readily understood, we annex a sheet of explanatory drawings, in which
like letters of reference indicate like parts in any of the figures.
Fig. 1 represents the arm of the L pin, on which the saddle is fixed, and shows
the inside of the joint.
Fig. 2, is a top view of the two arms when put together.
Fig. 3, side view of same.
Fig. 4, modification of joint in section.
As one of chief objects in the construction of cycles is to combine lightness and
strength in every part of the machine, we have kept this point in view in contriving
this adjustable appliance, and we wish it to be understood that we are aware that
an pin is made with an adjusting motion, by which the relative position or
angle of the two parts may be varied, and therefore we do not claim an adjusting
action broadly.
In carrying out our invention we construct the two parts A, and B, so as to
form a clutch joint at the ends A' and B' which are to form the junction, and the
form of this clutch joint which we prefer is the one illustrated in Figures 1, 2, 3.
Each part is preferably a facsimile of the other, and would be readily made by
stamping the parts in a pair of tools cut for the purpose.
The parts A and B', are semi-spherical, and have a centre hole C. to receive a
bolt or a screw D; we prefer a screw as shown, so as to reduce the number of
parts, in which case, one of the holes in the parts A¹ or B', would be screw-threaded
to engage with the screw.
Each part is prepared with teeth E, which may be of any suitable form such as
the ratchet teeth shown, but any equivalent device may be used that will answer
the same purpose of teeth, such as pins and corresponding holes, or clutching
devices like the one shown in Fig. 4-which consists of an internal conical recess R
in one part, and a correspondingly coned projection P, from the other part, these
are fitted together and are secured by the screw D, which forces the projection P,
into the recess R; or a number of concentric recesses and corresponding annular
projection may be used to form a frictional clutch, in combination with a screw D.
When it is desired to alter the position of the arm A, Fig. 1, all that is necessary
is to unscrew the screw D, until the teeth E. will disengage, then turn the arm to
the desired angle, and return the screw to its normal position as in Fig. 2.
Having thus particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is or may be performed, or carried into effect,
we declare that what we claim is :—
1 Constrating the L
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11

page_text: circles of teeth, or their equivalents, formed round the centre hole of each part,
which fit together and allow the arms to be secured in any position by a screw or
bolt passed through the centre hole, substantially as hereinbefore described, and as
illustrated in Figs. 1, 2, 3.
2. Constructing the Ĺ pin of cycles, with an adjustable joint formed by one or 5
more annular, conical or tapering, or V shaped recesses, and corresponding pro-
jections formed round the centre hole of each part A, and B, and secured by a
screw passed through the said centre hole, substantially as hereinbefore described
and shown in Fig. 4.
Dated the 5th day of September 1891.
ROBT. F. DRURY, Fel. Inst. P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicants.