IMPROVEMENTS IN THE MANUFACTURE OF RAZOR BLADES
Year: 1884

page_text: I EDWARD EDWARDS HEWETT of High Court Chambers High Street Sheffield
Yorkshire, Consulting Engineer of the London and Provincial Patent Agency do
hereby declare the nature of the said Invention for IMPROVEMENTS IN THE
MANUFACTURE OF RAZOR BLADES communicated to me from abroad by James
Memmott, of 5 Dover Street Worcester United States of America Grinder (formerly
resident of Sheffield Yorkshire) to be as follows:-
The object of this invention is to produce razor blades with as finely hammered
and compact edges under trip and drop hammers as it is possible to produce by
hand forging, and to secure uniformity of shape, and any design or pattern desired
direct from the forge so as to save the labor and expense of grinding out these
designs and patterns from the necessarily rudely shaped blades that come from the
hand forgers.
•
The Invention consists firstly in rolling a bar' of steel with concaved sides so as
to resemble two of the bars now in common use for forging razor blades joined
together edge to edge; secondly in cutting up the said bar of steel into pieces or
blanks each suitable for forging therefrom two razor blades and tangs; thirdly in
forging the said pieces or blanks under a trip hammer into the general form of two
razor blades and tangs; fourthly by means of dies under a drop hammer to further
forge the blades into the desired shape of two perfectly formed razor blades and
tangs, the blades of which are joined together edge to edge; fifthly in cutting the
blades apart to form two separate razors.
The bar with the two sides concaved is cut into blanks each of which contains
enough steel for two razor blades, each blank is rebated at its ends so as to leave.
steel projecting at the diagonal corners to form the tangs of the blades.
The blanks are then forged under a trip hammer into the general form of two,
razor blades placed edge to edge and with the tangs at the diagonal corners.
These general forms are then placed in dies under a drop hammer and hammered
until the steel for the cutting edges of the blades' has been brought to the desired
compactness and the whole blades and tangs brought to the required shape.
The blades are then cut apart by press cutters and they are then ready for
hardening tempering and grinding in the usual way.

page_text: COMPLETE SPECIFICATION.
I EDWARD EDWARDS HEWETT of High Court Chambers, High Street, Sheffield,
in the County of York, Consulting Engineer of the London and Provincial Patent
Agency, do hereby declare the nature of the said invention, for " IMPROVEMENTS
IN THE MANUFACTURE OF RAZOR BLADES," communicated to me from abroad, by
James Memmott, of 5 Dover Street, Worcester, United. States of America, Grinder,
(formerly resident of Sheffield, Yorkshire,) and in what manner the same is to be
performed, to be particularly described and ascertained, in and by the following
statement:-
The object of this-invention is to produce razor blades with as finely hammered
and compact edges under trip and drop hammers, as it is possible to produce by
hand forging and to secure uniformity of shape, and any design, or pattern desired
direct from the forge so as to save the labor and expense of grinding out these
designs and patterns from the necessarily rudely shaped blades that come from the
hand forgers.
2
The invention consists, firstly, in rolling a bar of steel with concaved sides so as
to resemble two of the bars now in common use for forging razor blades, joined
together edge to edge; Secondly, in cutting up the said bar of steel into pieces or
blanks each suitable for forging therefrom two razor blades and tangs; Thirdly, in
forging the said pieces or blanks under a trip hammer into the general form of
two razor blades and tangs; Fourthly by means of dies under a drop hammer to
further forge the blades into the desired shape of two perfectly formed razor blades.
and tangs, the blades of which are joined together edge to edge; Fifthly, in cutting
the blades apart to form two separate razors.
.
The bar with two sides coucaved is cut into blanks each of which contains enough,
steel for two razor blades, each blank is rebated at its ends so as to leave steel
projecting at the diagonal corners to form the the tangs of the blades...
t
The blanks are then forged under a trip hammer into the general form of two.
-razor blades placed edge to edge, and with the tangs at the diagonal corners."
These general forins are then placed in dies under a drop hammer and hammered
úutil the steel for the cutting edges of the blades has been brought to the desired,
compactness, and the whole blades and tangs brought to the required shape.
I'
The blades are then cut apart by press cutters and they are then ready for,
hardening, tempering, and grinding in the usual way.
My invention will be better understood by reference to the accompanying sheet
of drawings in which the same letters refer to similar parts throughout the several
views.
>
Fig. 1, Is a side elevation and
Fig. 2, Is au end elevation or section of a Bar of Steel commonly used for forging
into Razor Blades.
1.1.7.
.
.
Figs 3 & 4'are similar views of a bar of steel which may be Rolled Forged or
otherwise formed and from which Razor Blades may be forged or stamped by my
improved process of Manufacture.

page_text: The dotted lines in Fig 3 shew how this bar of steel is cut up into blanks
marked Beach of which containing sufficient steel to forge therefrom, two Razor
Blades and Tangs.
Fig 5 shews how the blanks B may be drawn under a Trip Hammer or other
mechanical appliance into the approximate form of Two Razor blades C C with
their respective Tangs E. E.
Fig. 6, Is a section of the twin blades after being so forged or stamped
represented in Fig. 5 through the line Y. Y.
Fig. 7, Represents the twin blades (as illustrated in Fig. 5) after they have been
further forged in dies under a drop Hammer or other mechanical appliance, and
the dotted lines shew how the twin blades C. C. may be cut apart.
Fig. 8, Represents the separate Razor Blade and Tang after having being so cut
apart and
Fig. 9 Is a section of the same through the line Z. Z.
Fig. 10, being a section of the tang of the blade taken through the line W. W.
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) Forming a bar of steel to be used in the manufacture of Razor Blades by
rolling, or forging, or otherwise with convex edges and concave sides as represented
in the sectional view on the accompanying sheet of drawings Fig 4.
(2) Cutting from the steel bar so formed, pieces, or blanks, and forging the said
blanks under a trip hammer, or other mechanical appliance, first in the approximate
form of two Razor Blades with their respective tangs, and afterwards completing
the forging of the same in dies or otherwise, then cutting apart the two blades so
forged so as to form two separate razor blades ready for hardening, tempering,
grinding and finishing in the ordinary way.
(3) Forging or stamping Razor Blades, in pairs out of one piece of steel, with
their respective cutting edges towards each other substantially as herein described
and set forth.