AN IMPROVED BOLT AND RIVET AND NUT-MAKING MACHINE
Year: 1866

page_text: PROVISIONAL SPECIFICATION left by Henry John Cooke at the Office
of the Commissioners of Patents, with his Petition, on the 12th October
1866.
I, HENRY JOHN COOKE, of Crumlin, in the County of Monmouth, in
England, do hereby declare the nature of the said Invention for "AN IMPROVED
BOLT AND RIVET AND NUT-MAKING MACHINE," to be as follows:-
This machine consists of a rotating circular iron table of any suitable or
required dimensions. It may be cast in segments or not, and is fitted with
rows of steel dies bored to suit the sizes of the bolts or rivets to be manu-
factured; these steel dies are accordingly made so as to be removed at
pleasure, their lower parts are made rather larger than the rest to allow full
play for the jumpers or rams by which the bolts or rivets after being formed
are ejected from the dies.
The heading tools are worked by small cranks or eccentrics on the main
shaft, which is driven by a spur wheel in the ordinary way. On the opposite
end of the main shaft, from which the heading tools are driven, I have a
small crank which works a pall; this pall by means of a ratchet wheel
and intermediate gearing communicates a rotary motion to the iron table,
and regulates the distance it has to travel, the said table having a toothed
wheel or circular ratchet cast on its under side for that purpose.
The furnace for heating the iron, rods should be specially constructed for
heating uniformly a long-length of iron. By means of a pall worked from.
the spur wheel on the main shaft, or direct from the main shaft itself, the

page_text: "
heated iron rods are drawn forwards through guide rollers the required
distance, where they are instantly cut by appropriate machinery driven from
the under side by an eccentric worked from the main shaft, the pieces falling
down an iron shoot to the steel dies, into which they are forced by hammers
worked either by a crank shaft or eccentrics on a shaft driven by spur wheels
from the main shaft. The pieces having been driven into the dies the table
continues to revolve so as to bring the dies immediately under the heading
tools which descend, and form the heads of the bolts or rivets. The heading
tools are withdrawn and the jumpers or rams already referred to are forced up
and eject the bolt or rivet from the die, which jumpers or rams are brought
back by a counterweight. The bolts or rivets when ejected on to the table are
collected by a rake which throws them off the table into a shoot; this rake is
worked with a slow forward and quick backward motion from any convenient
point. If desired the feeding apparatus can be dispensed with and the
machine may be fed by hand. The revolving table rotates on friction rollers,
and care is taken that the holes in the dies come directly under the heading
tools.
•
The heading tools of this machine can be worked if required by means of
a steam cylinder and piston placed over the centre of the table between two
standards, each standard baving a V-slide on the inner face in which slides
the casting which holds the heading tools and which work up and down with
the piston rod.. The heading tools and hammers may be also worked by com-
pressed air or by hydraulic pressure. When the heading tools are worked in this
manner, the spur gearing referred to is dispensed with, except the portion
which is necessary to give the rotary motion to the table, the feed motion, and
to the cutting shears.
When this machine is used for making nuts for screw bolts the heading
tools.above referred to are removed and others inserted in their place, which
punch the hole and cut the nut from the solid plate or bar of the required
size at one operation. The nut is thrown out of the die by means of a small
guide bar attached to a light casting or piece of wrought iron extending across
the table and secured by the standards so as to be removeable at pleasure,
In the making of nuts the machine would be fed by hand.