IMPROVEMENTS IN THE MANU- FACTURE OF SHEEP SHEARS
Year: 1879

page_text: LETTERS PATENT to Thomas Myers and James Duce, both of Sheffield, in
the County of York, for the Invention of "IMPROVEMENTS IN THE MANU-
FACTURE OF SHEEP SHEARS."
Sealed the 23rd September 1879, and dated the 27th March 1879.
PROVISIONAL SPECIFICATION left by the said Thomas Myers and James
Duce at the Office of the Commissioners of Patents on the 27th March 1879.
THOMAS MYERS and JAMES DUCE, both of Sheffield, in the County of York.
"IMPROVEMENTS IN THE MANUFACTURE OF SHEEP SHEARS."
Our Invention relates to improvements in the manufacture of sheep shears by
which they may be produced in an expeditious and economical manner; and it
consists chiefly in forming the moulds of sheep shears with all the various bevils of
the blades and different thicknesses of the bow and shanks at one operation by
means of rolling, so that the subsequent operations of grinding and finishing are of
the simplest nature. In carrying out our Invention in order to accomplish this
object counterparts of the desired mould are cut, sunk, or otherwise formed on the
circumference of a roll of suitable diameter, and which may be of either steel or
chilled cast iron, or other suitable metal, and which may be used either as the top
or bottom roll, but by preference the bottom roll, the corresponding roll being left
plain, but if found desirable a portion of the indentations or counterparts may be
cut or sunk on each roll instead of only upon one. The counterparts above described
may be either single or in such numbers as may be found desirable or the size of
the roll will permit. When a bar or biliet of the material from which the shear is
to be made is (after being heated to the proper degree) placed between the rolls it
will be drawn between them and forced by the pressure of the top or plain roll into
the counterparts or sunk portions of the bottom roll, and at every revolution a
complete mould or moulds of one or more sheep shears will be produced.
The thin "fash" or waste is then cut off by ordinary means, and the mould is
ready for grinding & finishing. If preferred the half of a shear may be produced,
such halves being afterwards welded or otherwise fastened together.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Thomas Myers and James Duce in the Great Seal Patent Office on
the 26th September 1879.
THOMAS MYERS and JAMES DUCE, both of Sheffield, in the County of York.
"IMPROVEMENTS IN THE MANUFACTURE OF SHEEP SHEARS."
Our said Invention relates to the manufacture of sheep shears, the object of the
said Invention being to produce moulds of either parts of the said sheep shears, such
as the blades, or the blades and shank combined, or the complete moulds of sheep
shears with the different thicknesses and bevils required, and which are generally
forged by hand, and this in an expeditious and economical manner, so that they
may be readily finished in the ordinary manner, and this result we accomplish as
follows:-
In carrying out our Invention so as to form a complete mould for a shear, for
example, we cut, sink, mould, or otherwise form on the circumference of a suitable
roll or rolls of chilled cast iron, steel, or other suitable metal sunk prints or counter-
parts of the desired mould, and by preference we form them on one roll only, and
leave the corresponding roll plain or uncut, this plan being the least expensive; but,
if desired, part of the counterpart may be sunk on one roll and part on the other
roll. Rolls about ten inches diameter will be suitable for one counterpart of a
complete shear. A slab or bar of steel, or of iron and steel, of the proper size and
of a suitable heat, is entered through a guide into the rolls, and is pressed in passing
through into the prints above described and emerges from the rolls as one or more
complete shear moulds, according to the size of the slab or bar. The thin fash or
web of waste material is then cut off and the moulds ground, bent to shape, and
finished in the usual way. If the moulds are only half a shear they may be welded
or otherwise fastened together so as to form a complete shear.
And in order that our Invention may be more fully understood we shall now
more particularly describe the same, and shall therefore refer to the several
Figures of the annexed Sheet of Drawings, the same letters of reference indicating
corresponding parts in all the Figures.
Fig. 1 of the Drawings represents a finished pair of sheep shears made according
to our Invention in one solid piece of steel or iron and steel.
Fig. 2 represents a roll, and showing the arrangement of a portion of the sunk
print or counterpart of the shear mould.
Fig. 3 represents a portion of a bar of steel or other metal after leaving the rolls,
having one complete impression or mould, shown by the dotted lines. A, A, the
cutting edges of the blades; B, B, the backs of the same tapering to the points;
C, C, the shanks; D, the bow; E, the thin fash or web of waste material.
Fig. 4 represents the mould with fash or web removed.
Having now described and particularly ascertained the nature of the said
Invention, and the manner in which the same is or may be carried into effect,
we would observe in conclusion that what we consider to be novel and original, and
therefore claim as the Invention secured to us by the herein before in part recited
Letters Patent is, firstly, the manufacture of sheep shears from moulds formed by
rolling bars or slabs of steel, or iron and steel, between rolls, one or both of the said
rolls being cut, sunk, or moulded with a counterpart of the said moulds on its or
their circumference.
+

page_text: The manufacture of moulds or bars varying in thickness by passing them through
rolls provided with sunk counterparts, such moulds being for the manufacture of
sheep shears.
In witness whereof, we, the said Thomas Myers and James Duce, have here-
unto set our hands and seals, this Twentyfifth day of September, in the
year of our Lord One thousand eight hundred and seventy nine.
THA
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