AN IMPROVED ROLLING MACHINE FOR THE MANUFACTURE OF CHISELS, DRAWING KNIVES, AND SIMILAR IMPLEMENTS.
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by William Robert Lake at the Office
of the Commissioners of Patents on the 1st March 1880. A communication
from abroad by George Parr, of Buffalo, New York, United States of
America.
"
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "AN IMPROVED ROLLING MACHINE FOR THE
MANUFACTURE OF CHISELS, DRAWING KNIVES, AND SIMILAR IMPLEMENTS.' [A
communication from abroad by George Parr, of Buffalo, New York, United States
of America.]
My Invention relates to machinery for making chisels, drawing knives, and
similar tools or implements, by drawing out the blanks to the proper shape between
rolls provided with suitable dies.
The object of the said Invention is to render the said machinery very simple in
construction and use, so as to dispense as much as possible with skilled labor in the
manufacture of the articles to be made.
In carrying the said Invention into practice, I provide an upper roll with a
segmental die and a lower roll with a circular or annular die, whereby the lower
roll is enabled to act as a support and guide in presenting the blank to the action of
the upper die, thereby dispensing with the guide bars usually employed, for that
purpose; I also provide a straight bar arranged in one of the annular dies of the
lower roll, and travelling with said roll for straightening and edging the articles
operated upon.
The said rolls are mounted on shafts which are supported in suitable bearings in
the side frames of the machine. The upper roll is driven from the lower roll by a
pair of gear wheels in the usual manner. The male dio is secured to the upper roll
and made in the form of a circular segment, and of a length suitable to produce a
chisel, drawing knife, or other implement of the desired size. The female die is
formed in or secured to the lower roll. The lower die is made circular or annular,
so as to extend completely around the lower roll. Any desired number of such dies
of various sizes or cross sections may be formed in the lower roll, and the upper dio
may be made of such a width as to co-operate with all of tho lower dies. The face
of the upper die is made excentric or farthest apart from the lower dic at its head,
or at the point where the die first seizes the blank, and it gradually approaches the

page_text: lower die according to the taper required for the particular kind of chisel to bo
produced. When it is desired to roll drawing knives or other implements which
are not tapered longitudinally, the face of the upper die is straight while that of
the lower die is concave, whereby a chisel is produced which is flat on one side and
convex on the other side. It is obvious that the form of the faces of the dies and.
their dimensions may be varied in accordance with the different kinds of chisels or
other implements intended to be made. Flat and thin chisels may be rolled on the
plain portion of the lower roller. A straight rigid bar of steel, iron, or other suitable
material is arranged horizontally in the groove or anuular die of the lower roll,
and connected at its rear end with an elastic bar or spring arm secured to the
stationary frame of the machine. The said rigid bar is made somewhat longer than
the chisel or other tool intended to be straightened on the bar, measuring from tho
point of contact with the lower roll rearward. The bar is provided with a forward
extension terminating in a hook, shoulder, or off set, which engages over a stop or
piece, and limits the rearward movement of the rigid bar.
The rear end of the said rigid bar is preferably provided with an eye, so that it
can be connected with the spring bar by means of a book, thereby pormitting it to
be readily removed.
The annular dies or grooves are made of sufficient depth to receive the widest
chisel, together with a bar of suitable thickness for forming a rigid support for the
chisel. In rolling chisels or other tools of less width the said bar is removed, and
another one of greater thickness substituted, according to the width of the article
operated upon.
In this manner chisels and other tools or implements are formed on my machine
very rapidly, and without requiring any particular skill on the part of the operator,
whereby the cost of producing theso articles is greatly lessened, and at the same
time the quality of the article is greatly improved.