Improvements in the Method of Manufacturing Cycle Gear-wheel. Adjusting-pins.
Year: 1894

page_text: Date of Application, 11th July, 1894-Accepted, 11th Aug., 1894
COMPLETE SPECIFICATION.
Improvements in the Method of Manufacturing Cycle Gear-wheel.
Adjusting-pins.
We FRED WARWICK and EDWARD WARWICK, both of Sheffield Works, Alma
Street Aston in the County of Warwick, Manufacturers of Cycle Materials.
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 the adjusting-pins used in the slots of cycle-framing as-
a means of tightening the gear-chains.
Hitherto adjusting-pins have been made in various ways, some rolled out of
sheet-metal, others produced in one piece by stamping processes, under both of such
old methods there are disadvantages, the sheet-metal pins are liable to break
at the point where the washer ends and the round pin commences; the pins-
stamped out of solid metal are expensive because the rough stamping must pass.
through several finishing processes.
Our invention has for its object the production of an adjusting-pin at a low cost.
which will at the same time be a perfect adjusting-pin for the purpose required and
herein described.
We will now proceed to describe the method of constructing our invention,.
reference being had to the accompanying drawings in which
Figure 1 represents a side view of adjusting-pin in position at back slot of
cycle-framing.
Figure 2 represents a plan of Figure 1.
Figure 3 represents a side view of washer part of our improved adjusting-pin.
Figure 4 represents a front view of washer part shewn at Figure 3.
Figure 5 represents a detailed view of our improved adjusting pin ready to
receive its washer part.
Figure 6 represents an end view of Figure 5.
Figure 7 represents a plan of Figure 3.
Figure 8 represents a view of our improved adjusting-pin completed ready
for use.
We
In carrying out our invention we pierce from a flat sheet of metal a blank
of suitable configuration to form into the washer shewn at Figures 3, 4 and 7.
may produce such washer out of sheet metal at one operation or the ear a may be
bent into position by a second operation.
We next provide a solid threaded pin as shewn in detail at Figure 5, the threaded
pin is provided with a shank end b, one side of the shank is flattened at c, thus-
forming a D section.
We next connect the threaded pin to the washer by passing the shank end b
through the passage d formed in the ear a of washer; the protruding end of pin-
shauk is next rivetted as shewn at e Figure 8 thus consolidating the threaded
pin with the washer and producing a complete adjusting-pin suitable for use with
the frame-cheeks of cycles to tighten the gear-chains; in lieu of the rivetting
connection the shank b of screwed pin may be secured to and consolidated with the
washer by compressing the edges of the hole d pierced in the ear a tightly on and
over the shank b of pin or by expanding the shank 6 of pin within the hole d formed
in ear a of washer or the shank b of pin may be secured to and consolidated with
the washer by any other equivalent mechanical means, as it will be readily
understood that our-invention consists essentially in providing a shanked pin and.

page_text: also a washer with a shank hole, and then consolidating the two parts into one
article suitable for use as an article of commerce in the cycle-fitting trade.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
The new manufacture of cycle gear-chain adjusting-pins by the combination of
a washer, part with a bolt part to form and forming a cycle gear-chain adjusting-
bolt, as illustrated and described.
AL of Inly 1894
ALFRED WM. TURNER,
Cobden Buildings, Corporation Street, Birmingham,
Agent for the Applicants.
ALFRED WM. TURNER,
Cobden Buildings, Corporation Street, Birmingham,
Agent for the Applicants.