IMPROVEMENTS IN MACHINERY FOR THE MANUFACTURE OF TRAM AND OTHER DESCRIPTIONS OF NAILS
Year: 1878

page_text: PROVISIONAL SPECIFICATION left by James Yates and Enoch Jagger at the
Office of the Commissioners of Patents on the 27th June 1878.
JAMES YATES and ENOCH JAGGER, both of Kilnhurst, in the County of York.
"IMPROVEMENTS IN MACHINERY FOR THE MANUFACTURE OF TRAM AND OTHER
DESCRIPTIONS OF NAILS."
This Invention relates to improvements in machinery for the manufacture of
nails for trains or tramways and other purposes.
The improved machinery is designed to manufacture nails by the following
process, that is to say-By means of rolls having an intermittent rotary motion
to form nail blanks (or partly formed nails), which said rolls can be constructed
to cut off the nail blank from the rod, strip, or plate, and also retain the
said blank until it is seized by a pair or set of dies, which said dies, or dies and
rolls combined, will hold the nail blank until it is headed by a heading tool.
The improved machinery to effect the operations above specified will or can be
constructed of the following principal parts, that is to say:The pair or set of rolls
employed to form the nail blank will be indented in their peripheries, so that when
the bar, strip, or plate is passed between them the nail blank will be shaped and the
intermittent action of the rolls will be produced by fitting or forming on the roll
shaft or connecting therewith a ratchet wheel, which will bo actuated by a ratchet
or pawl by any ordinary arrangement of gearing from the first motion shaft of the
machine. The dies will be placed at that side of the rolls opposite to the side where
the rod, strip, or plate enters. The dies will reciprocate in slides so as to open to
allow the nail blank to pass between them and close upon it whilst being headed.
The dies may be so formned and actuated as to assist in the operation of forming
the head; for instance, the dies may be countersunk or have a tapered cavity, and
the heading tool may be flat, so that the blank when held by the dies and struck
by the heading tool will be formed into a countersunk flat-headed nail, or the dies
may be inade simply to close upon and hold the blank, and the whole of the head
of the nail may be formed by the heading tool, and the form thereof be due to the
shape of the heading tool.

page_text: The heading tool will reciprocate in slides at right angles to the longitudinal
centre line of the roll shaft.
The dies and heading tool can be actuated by cranks and levers from one or
more of the working shafts in and of the machine.
The rolls, dies, and heading tool can be so constructed as that their working faces
can be changed so as to produce nails of different forms or sizes.
As modifications in and of the detail parts of the machinery to carry on the
operations above specified, the intermittent action of the rolls may be produced by
irregularly formed wheels, or by the rolls being thrown in and out of gear (from
those parts of the machine having continuous rotary motion) by clutches or friction
wheels, and the dies and heading tool may vibrate from or on fixed or moveable
centres, and may be actuated by levers and rods from one or more of the working
parts of the machine.
One or more complete sets of principal detail parts may be combined in one
machine and be actuated from the same source of original motion.