IMPROVEMENTS IN MACHINERY FOR THE MANUFACTURE OF SPLIT COTTER PINS OR LYNCH PINS
Year: 1873

page_text: PROVISIONAL SPECIFICATION left by Charles Farmer and James.
Sandon Turner at the Office of the Commissioners of Patents, with
their Petition, on the 27th August 1873.
We, CHARLES FARMER, of Aston, near Birmingham, in the County of
Warwick, Manufacturer, and JAMES SANDON TURNER, of Birmingham,
aforesaid, Manufacturer, do hereby declare the nature of the said Inven-
tion for "IMPROVEMENTS IN MACHINERY FOR THE MANUFACTURE OF SPLIT
COTTER PINS OR LYNCH PINS," to be as follows :-
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Our Invention consists of the construction and arrangement or
combinations of parts of machinery herein-after described for the
manufacture of split cotter pins or lynch pins; the said split cotter
pins or lynch pins consist of doubled or folded pieces of wire, the folded
parallel parts being connected together by a circular or other shaped eye.
These pins are commonly used for fixing parts of machinery, but they are
also used for various other purposes, for example, for fastening coffin
handles, and when so used are commonly called coffin loops or snipes.
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We construct, arrange, and work the parts of machinery according to
our Invention in the following manner:-The flat or half round wire

page_text: from which the split cotter or lynch pins are to be made is fed into the
machine by a feeder of the ordinary kind. The end of the wire is fed
over a fixed cutter to an adjustable stop. Beneath the wire fed into tho
machine is a pair of gripping and compressing levers, and over the
middle of the said levers and situated at right angles to the wire is a
peg or bending tool having a vertical motion.
At the side of the machine opposite that at which the peg or bending
tool is situated. and in a line with the said bending tool is a horizontal
pointed slide having the general figure of the blade of a knife. After
the wire has been fed to the stop a moveable cutter descends and
cuts off a length of wire between itself and the fixed cutter. The
peg or bending tool next descends and carries down the cut off length
of wire between the pair of gripping and compressing levers, the said
wire as it is carried down being doubled or folded into two nearly
parallel limbs or branches. The gripping and compressing levers next
close upon and compress the limbs of the partly made pin and press
them nearly into contact. The compression of the limbs of the partly
made pin is however not effected by one motion of the compressing
levers, but by a series of motions, that is to say, the doubled wire or
partly made cotter pin having been partly compressed, the pointed
knife-like slide herein-before described advances horizontally and passes
between the limbs of the cotter pin near the eye part thereof. By the
continued motion of the compressing levers the said limbs of the pin are
compressed together with the said slide between their upper parts. The
compressing levers afterwards slightly retire and the slide is withdrawn
from between the limbs of the cotter pin. The compressing levers again
advance and complete the compression of the limbs of the cotter pin.
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During the compressing operation the eye part of the cotter pin is
shaped around and made to take the circular or other figure of the peg
or bending tool. By effecting the closing or compressing of the limbs
of the split, cotter or lynch pin in the manner described the point ends of
the said pin have no tendency to spring or open out. After the cotter
or lynch pin has thus been made the gripping. and compressing levers
retire, the peg or bending tool rises, and the finished cotter pin is
removed from the said peg or bending tool by a knocker off.
The motions of the several moving parts of the machine are taken
from the driving shaft. The moveable cutter consists of a lever worked

page_text: by a crank on the driving shaft. The peg or bending tool is carried by
a vertical dovetail slide and the latter is worked from a cam on the
driving shaft. The gripping and compressing levers are also worked
from cams on the driving shaft.
The pointed slide is worked by a cranked lever from a cam on the
driving shaft, and the knocker off which consists of a lever is worked by
an incline on the vertical slide carrying the peg or bending tool.
Instead of working the peg or bending tool by a slide the said peg or
tool may turn upon a centre and be worked by a compound cranked
lever from a cam on the driving shaft.