MENTS IN SHEEP SHEARS
Year: 1878

page_text: PROVISIONAL SPECIFICATION left by the said Thomas Brown at the Office
of the Commissioners of Patents on the 5th June 1878.
THOMAS BROWN, of Regent Works, Sheffield, in the County of York.
MENTS IN SHEEP SHEARS."
"IMPROVE-
According to one of my present improvements I construct the part of sheep
shears constituting the spring of a separate piece from the two parts forming the
blades and shank, the spring being afterwards secured to the shanks by rivetting
or welding. By this means I am enabled, firstly, to economise both labour and
material as compared with the ordinary mode of making the blades, shanks, and
spring all of one piece; and, secondly, I am enabled to make the spring of a
material more suited for its purpose, different from the material of which the blades
and shanks are made.
For making the springs I prefer to employ sheet steel of uniform thickness, the
springs being flyed or stamped out of the sheet, and then curved to the desired
shape, and hardened and tempered.
The blades and shanks I prefer to make of iron and steel, fused or welded
together in the process of making the ingot, according to a method now well
known in the manufacture of other cutting tools, the ingot being rolled or hammered
out into sheets or bars, out of which the blanks for the blades and shanks are flyed
or stamped out, and then shaped to the required form. The blades and shanks may
however be made of cast steel or other suitable material instead of that above
described.
According to another improvement I make the spring so that from the point of
its attachment to or connection with the shanks it curves inwards towards the™

page_text: blades instead of curving outwards in the usual manner, and I prefer to make such
springs of a separate piece from the blades and shanks, and rivetted or welded
thereto, as before described; they may however be made of one piece with the
blades and shanks in the usual manner, in which case at the point of junction with
the shanks the part forming the spring is bent over sharply so as to curve inwards
towards the other shank.
By constructing the shears in the above-described manner they are rendered
stronger than the usual form, and are not so liable to get out of truth or "set."
SPECIFICATION' in pursuance of the conditions of the Letters Patent filed by
the said Thomas Brown in the Great Seal Patent Office on the 29th November
1878.
THOMAS BROWN, of Regent Works, Sheffield, in the County of York.
MENTS IN SHEEP SHEARS."
"IMPROVE-
According to one of my present improvements I construct the part of sheep
shears constituting the spring of a separate piece from the two parts forming the
blades and shank, the spring being afterwards secured to the shanks by rivetting
or welding in such a manner that from the point of its attachment to or connection
with the shanks it curves inwards towards the blades instead of curving outwards
in the usual manner.. By this means I am enabled, firstly, to economise both labour
and material as compared with the ordinary mode of making the blades, shanks,
and spring all of one piece; and, secondly, I am enabled to make the spring of a
material more suited for its purpose, different from the material of which the blades
and shanks are made, while by the inward curvature of the spring the shears are
rendered stronger and not so liable to get out of truth or "set."
For making the springs I prefer to employ sheet steel of uniform thickness, the
springs being flyed or stamped out of the sheet and then curved to the desired
shape, and hardened, and tempered.
The blades and shanks I prefer to make of iron and steel, fused or welded together
in the process of making the ingot, according to a method now well known in the
manufacture of other cutting tools, the ingot being rolled or hammered out into
sheets or bars, out of which the blanks for the blades and shanks are flyed or
stamped out and then shaped to the required form. The blades and shanks may
however be made of cast steel or other suitable material instead of that above
described.
Although I prefer to make such before-described inward curved springs of a
separate piece from the blades and shanks, and rivetted and welded thereto, as
before described, yet they may be made of one piece with the blades and shanks in
the usual manner, in which case at the point of junction with the shanks the part
forming the spring is bent over sharply so as to curve inwards towards the other
shank.

page_text: Fig. 1 shews a pair of shears with inward curved spring constructed according to
my before-described Invention.
Fig. 2 shews the blank for the blade and shank A; Fig. 3 shews the same shaped
to the finished form.
Fig. 4 shews the blank for the spring B; and Fig. 5 shows the same shaped to
the required curvature, and provided with rivet holes for rivetting to the shanks,
as at Fig. 1.
Fig. 6 shews the modified construction in which the inward curved spring B is
either welded to or formed in one piece with the shanks and blades A, A.
Having thus described the nature of the said Invention, and in what manner the
same is to be performed, I claim,―
First. Constructing sheep shears with a spring curving inwards from its point of
attachment to or connection with the shanks, substantially as herein described.
Second. Constructing sheep shears with a spring formed of a piece of steel
separate from and rivetted or welded to the shanks and blades, the said spring being
formed so as to curve inwards from the point of attachment to the shanks, sub-
stantially as herein described.
In witness whereof, I, the said Thomas Brown, have hereunto set my hand
and seal, this Sixteenth day of November, in the year of our Lord One
thousand eight hundred and seventy-eight.
MITA
DRAMAT
THOMAS BROWN. (L.B.)