Improvements in the Manufacture of Sheep Shears and in the Construction of Tools used therefor.
Year: 1889

page_text: Date of Application, 22nd May, 1889-Accepted, 29th June, 1889
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Sheep Shears and in the
Construction of Tools used therefor.
We DAVID WARD of West Street, Sheffield in the County of York, Manufacturer,
and l'HILIP ASHBERRY of Upperthorpe Sheffield aforesaid Manager do hereby
declare the nature of this invention 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 improvements in the process or method of manufacturing
Sheep Shears from bar steel, in contradistinction to punching or cutting them out of
sheet steel, and to the construction or formation of the Tools used for that purpose;
the objects of the said invention being to produce a first class hammered shear from
bar steel, with little waste material, great regularity or uniformity of the parts, and
in an expeditious manner.
The annexed sheet of drawings represent the Tools used in carrying out this im-
proved method or system of manufacture, and also the steel in the various forms
produced by such tools.
Fig. 1, represents a pair of pressing Tools for producing the first forms of steel, as
shown in Figs. 2 and 3 on a larger scale.
Figs. 4, 5, 6, show the steel undergoing the before mentioned processes.
Figs. 7, 8, 9, represent another pair of Tools.
Fig. 10, two views of the form of the steel after being submitted to the above
tools.
Figs. 11, 12. 13. 14, views of a pair of Tools for " necking" and Fig. 15 the rosult
of such Tools.
In carrying out our invention we take for example a piece of steel 44" inches long,
by 1 wide, and 3 thick, marked A, and seen in Fig. 4, and we place it, when it is
heated to the required degree, between the faces of the tools shown in Fig. 1,
marked B and B₁-and also shown in Fig. 4. When the faces of the Tools close as
shown in Fig. 5, by the descent of the top tool which is held in the slide of the
pressing machine it compresses the steel as shown in Figs. 2 and 5, it is then placed
in the recess C, of the same tools, as shown in the section Fig. 6-and pressed to
the form in Fig. 3.
Figs. 7 and 8 represent the faces of a pair of tools and Fig. 9, shows the ends of
same; these are required for the next process, and they transform the steel from
Fig. 3 to the configuration shown in Fig. 10, producing the stop D, the butt of the
blade E and partly formed neck F. The blade and the tang (or that part which is
to form the shank and the bow) are now drawn out as indicated by the dotted lines in
Fig. 10, placed in the Tools Figs. 11 & 12, which perfect the shape of the neck and
shank G, and form the solid part H, seen in Fig. 15.
The process up to this point is novel, but the partly formed shear, may after this,
be completed by any of the usual methods.
Although we have only described the process as applied to a double bow shear or
one made in halves it may with very slight modifications of the tools be applied to
single bow shears.
The Tools consist of the top & bottom tools shown in Fig. 1, having a flat top
face B', and a stepped bottom face B-also a curved recess C, and a corresponding
strip on the top tool, the shape or thereabouts being shown in Fig. 6.
Secondly of the top and bottom Tools illustrated in Figs. 7, 8, 9. The two faces I
are shallow recesses and when together give the thickness of the blade, and the pro-
jection J, entering the depression K with the assistance of the rounded shoulder L
form the stop D, while the parts M give shape to the neck portion F.
The Tools illustrated in Figs. 11. 12. 13. 14, which may be termed the finishing
tools of this process, are for giving the form seen in Fig. 15. The bottom tool

page_text: Fig. 11, is provided with a groove N, and 'two side recesses O, we prefer also to have
a removable guide F, with a slot Q to receive the edge of the blade. The top tool
Fig. 12, is provided with a projection R, to fit into the groove N, a small part of
which is cut away at S, which forms the solid piece H, in the neck shown in Fig. 15,
when the drawn out neck and shank portion shown by the dotted lines on the right
hand in Fig. 10, rests upon the sunk flats O Figs. 11 & 13, the top tool is brought
down upon it and the projection R, forces it down into the recess N and presses it to
the desired form.
We prefer to use the first described tools in a pressing tool, and the latter in a
steam-hammer or other power hammer, but we do not confine ourselves to such
use.
Having now particularly described and ascertained the nature of our invention,
and in what manner the same is to be performed we declare that what we claim is :-
1-The improvements in the manufacture of Sheep Shears from bar steel by
pressing or forging the steel in special tools, to the forms shown in Figs. 2, 3, 10
& 15 on the annexed sheet of drawings, substantially as described and specified.
2-The tools (specially constructed for the purpose of producing the moulded forms
of steel claimed in the preceding claim) herein before described and illustrated in
Figs. 1. 4. 5. 6. 7. 8. 9. 11. 12. 13. 14 of the drawings annexed.
3-In the manufacture of sheep shears from the bars, the use of any of the separate
pairs of Tools claimed, whether used in combination with the others, or in connection
with a different process of manufacture.
Dated the 17th
ΟΙ
1009.
ROBT. F. DRURY (Fel. Inst. P.A.),
Bank Buildings, George Street, Sheffield, Agent for Applicants.