An IMPROVED MACHINE, OR IMPROVEMENTS IN MACHINERY OR APPARATUS, FOR FORMING OR FORGING THE BURRS OR NUTS FOR SCREW BOLTS, APPLICABLE ALSO TO FORMING, FORGING, OR COMPLETING BLANKS FOR BOLTS AND PIECES OF METAL FOR OTHER PURPOSES
Year: 1855

page_text: application for Letters Patent was not given within the time prescribed
by the Act.)
PROVISIONAL SPECIFICATION left by Robert Jamieson at the Office of
the Commissioners of Patents, with his Petition, on the 16th May 1855.
I, ROBERT JAMIESON, of Ashton-under-Lyne, in the County of Lancaster,
Machinist, do hereby declare the nature of the said Invention for "An
IMPROVED MACHINE, OR IMPROVEMENTS IN MACHINERY OR APPARATUS, FOR FORMING
OR FORGING THE BURRS OR NUTS FOR SCREW BOLTS, APPLICABLE ALSO TO FORMING,
FORGING, OR COMPLETING BLANKS FOR BOLTS AND PIECES OF METAL FOR OTHER
PURPOSES," to be as follows:-
It consists in a new and simplified arrangement and combination of parts
by which the forming or forging of burrs or nuts is effected. The improved
machine or apparatus is furnished with a cam shaft, which is kept in motion
by a steam engine or other adequate power. On this cam shaft is fixed a
single cam or eccentric, which actuates a slide in a similar manner to the
punching and shearing machines in common use. This slide has fixed upon it
two punches, which act simultaneously on the bar of metal out of which the
nuts are to be formed. The first punch is of a cylindrical form, and punches
the holes in the burrs or nuts; the second punch is of a square, hexagonal,
or other form, corresponding to the external shape or form of the burr or nut.
These punches have each their corresponding dies or corresponding apertures

page_text: in the same piece of metal or die. The die or dies are adjusted and fixed to
the framework of the machine. Underneath the die or apperture, correspond-
ing to the cylindrical punch, is a channel, through which are delivered the
pieces of metal punched out of the bar in the process of forming the hole in
the nut. Underneath the other die or aperture, corresponding to the second
die or punch (which gives the external form to the nut), is another channel,
through which the nut is delivered when completed.
The machine being put in motion, a bar of metal is presented to it, so that
a cylindrical hole is punched through it at such a distance as to form the hole
in the first nut. The punches being withdrawn by the action of the cam, the
bar of metal is pushed forward so far that the centre of the hole already
punched corresponds to the centre of the second punch, which finishes the
exterior of the nut. The punches again descending, the second punch forces a
portion of the bar of metal through the second apperture, which operation
completes the nut. The first punch descending at the same time punches
another hole in the bar of metal, which forms the hole in the second or follow-
ing nut; the process of completing one nut, and punching the hole for the
next one, being performed simultaneously by the same stroke of the cam or
eccentric. If the burrs or nuts are to be formed of wrought iron, the bar
must be brought to a red heat previously to presenting it to the machine.
I likewise apply the same mode of arranging and combining the different
parts of the apparatus to the purpose of forging, forming, or completing the
blanks for bolts, corresponding alterations being made in the form of the
punches and dies. I likewise vary the forms of the punches, so as to form
other articles of metal besides those above enumerated, and also use three
or more punches fixed to the same slide, when the article to be manufactured
admits of being produced by the successive action of punches in the manner
described. By these means I am enabled to construct machines applicable
to forging or forming nuts and blanks for bolts and various other articles,
which possess great simplicity of construction and economy in the use, and at
the same time are perfectly efficient for the purpose.