IMPROVEMENTS IN THE MANUFACTURE OF SCISSORS AND SHEARS
Year: 1884

page_text: I ALBERT JOHN HOBSON of Sheffield in the County of York Scissors Manu-
facturer do hereby declare the nature of my invention for IMPROVEMENTS IN THE
MANUFACTURE OF SCISSORS AND SHEARS to be as follows:-
This Invention relates to the manufacture of Scissors and Shears.
The object of my Invention is to manufacture Scissors and Shears with solid steel
blades and malleable cast iron bows and shanks, the blades of which are of a
quality equal to the best hand forged steel scissors and shears.
The essential features of my Invention consist in casting the shanks and bows
of malleable iron onto steel blades in combination with the method of decarbonising
the said shanks and bows without injury to the steel blades upon which they are
cast.
In carrying my Invention into effect I form a blade preferably of best cast Steel
with a tang with or without holes or recesses therein to be filled in by the metal
for the purpose of securing the blade and tang together, the malleable iron shank
and bow are cast onto the blade, the bow and shank are then decarbonised in the
following manner to soften and toughen them to enable them to be finished and to
prevent them breaking.
The blade is coated or covered with a vitreous or silicious compound wholly or
partially to protect it from the action of the decarbonizing agent employed to
soften the malleable casting and embeded in a non-fusible or fire-resisting material
such as fire clay or ganister or it is embeded in a mixture of sand and a
carbonizing agent such as charcoal.
The shanks and bows are exposed to the action of a decarbonizing agent such as
Hematite Iron Ore and subjected to the action of heat in a closed and air-tight
vessel in the ordinary way.
The shanks bows and blades are finished in the ordinary manner.
By preference the malleable Iron surrounds the end of the tang completely and
in other portions thereof on three sides only.

page_text: I ALBERT JOHN HOBSON of Arundel Street, Sheffield, Yorkshire, Cutlery
manufacturer do hereby declare the nature of my Invention for "IMPROVEMENTS
IN THE MANUFACTURE OF SCISSORS AND SHEARS," and in what manner the same
is to be performed to be particularly described and ascertained in and by the
following statement :-
This Invention relates to the manufacture of Scissors and Shears.
The object of my Invention is to manufacture Scissors and Shears with solid
steel blades and malleable cast iron bows and Shanks, the blades of which are of a
quality equal to the best hand forged Steel scissors and shears.
The essential feature of my Invention consists in casting the shanks and bows
of scissors and shears of malleable iron on to steel blades, in combination with the
method of decarbonizing the said shanks and bows without injury to the steel
blades upon which they are cast.
In carrying my Invention into effect I form a blade, preferably of best cast steel
with a tang, with or without holes or recesses therein, to be filled in by the metal
for the purpose of securing the blade and tang together, the malleable iron shank
and bow are cast on to the blade, the bow and shank are then decarbonized in the
following manner, to soften and toughen them to enable them to be finished, and
to prevent them breaking: The blade is coated or covered with a vitreous or
siliceous compound wholly or partially to protect it from the action of the
decarbonizing agent employed to soften the malleable casting and embedded in a
non-fusible or fire resisting material, such as fire clay or gannister, or it is
embedded in a mixture of sand and a carbonizing agent such as charcoal or other
equivalent. The shanks and bows are exposed to the action of a carbonizing
agent such as Hematite Iron ore and subjected to the action of heat in a closed
and air tight vessel in the ordinary way.
The shanks, bows and blades are finished in the ordinary manner.
By preference the malleable Iron surrounds the end of the tang completely and
in other portions thereof on three sides only.
The accompanying Drawings illustrate my Invention as applied to scissors and
shears. Figures 1 and 2 represent the blades of a pair of scissors or shears in the
forged state. Figures 3 and 4 represent the same blades after the malleable
shanks or bows have been cast upon them, the cross section through A and B
shewing the disposition of the malleable iron when cast on the blade Figures
5 and 6 represent two views of a pair of finished scissors or shears manufactured
in the manner herein described.
Figure 3 which is a view looking on the inside or working face of the blade,
shows the point of the tang C, entirely surrounded by the metal of the malleable
iron bow by which it is secured, a pin or rivet being fixed through the blade and
the bow as an additional fastening as shewn at D.
Figure 4 represents the back or outside of the other blade and bow and shows
by the dotted lines the point of the tang E entirely surrounded by the metal of
the malleable iron bow by which it is secured, a pin or rivet being fixed through
the blade and the bow as an additional fastening as shewn at F and in similar
manner to that already described in Figure 3.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is
1. Improvements in the manufacture of scissors and Shears by casting the
shanks and bows of malleable iron on to Steel blades, substantially as herein before

page_text: specified, described and illustrated by the accompanying Drawings as shewn in
Figures 1, 2, 3, 4, 5, 6, and the cross section at A B.
2. The method of decarbonizing the shanks and bows of scissors and shears
herein before specified, described and illustrated without injury to the steel blades
upon which they are cast.
Dated this 26th day of Santambar 1001.
ALBERT JOHN HOBSON,
Applicant.