MANUFACTURE OF RAZORS, PART OF THE SAID IMPROVEMENTS BEING APPLICABLE TO THE MANUFACTURE OF FORCEPS AND OTHER SURGICAL AND DENTAL INSTRU- MENTS
Year: 1878

page_text: PROVISIONAL SPECIFICATION left by David Furniss at the Office of the
Commissioners of Patents on the 27th April 1878.
"IMPROVEMENTS IN THE
DAVID FURNISS, of Sheffield, in the County of York.
MANUFACTURE OF RAZORS, PART OF THE SAID IMPROVEMENTS BEING APPLICABLE TO
THE MANUFACTURE OF FORCEPS AND OTHER SURGICAL AND DENTAL INSTRU-
MENTS."
This Invention relates to the manufacture of razor blanks (blades and tangs), part
of the said Invention being applicable to the manufacture of forceps and other
surgical and dental instruments.
Razor blanks have hitherto been manufactured either wholly by hand or by
machinery, from sectional steel of a different form, and by a more expensive process
than the one which is the subject matter of this Invention.
This Invention consists in the manufacture of razor blanks by machinery from a
sectional bar of improved form, that is to say,-
Firstly. In the production of a bar of a section from which two or more complete
razor blanks can be easily produced.
Secondly. In cutting or detaching from the said bar two or more complete razor
blanks at one operation by circular or reciprocating cutters, or cutting out from the
said bar so much of its substance that the portion of the bar remaining (in proximity
to the cavity made in the bar) will represent two or more tangs, and further
cutting off from the said bar the complete razor blanks (blades and tangs).
And, Thirdly. In producing the indentations in the tang by machinery instead of
by hand.
According to this Invention razor blanks will be produced wholly by machinery,
and when thus formed or produced will be ready for smithing, grinding, hardening,
tempering, and polishing, as now ordinarily done.
In carrying into effect these improvements in the process of manufacturing razor
blanks the following method can be adopted, namely:-A sectional bar of steel can
be produced (in an ordinary rolling mill), which in cross section will resemble two
razor blanks, joined cutting edge to cutting edge, the reverse sides being hollowed out
Drine 071

page_text: in a curvlinear form; this bar is then operated on by a fly-press or punching machine,
and so much of the centre part thereof is removed as will leave the substance required
for and of the form of two or four tangs or hafts; this sectional bar will be so
operated on by the fly-press as that at the end thereof will be left two razor blades,
next four tangs or hafts, next thereto four blades, then four tangs or hafts, and so
on, to the end of the said bar, by cutting transversely through the centre of the tangs
or hafts and through the centres of the blades separate and distinct blanks will be
produced in pairs (joined cutting edge to cutting edge), these double blanks
will then be, cut longitudinally through the centre, producing complete single
blanks.
The process of cutting off and cutting out the blanks from the sectional bar
can be proceeded with in a different order to that above specified, but with the same
result.
The blanks are further operated on by a power hammer, or foot or hand stamp,
and the indentations in the haft or tang impressed therein instead of being cut by a
hand hammer and chisel, or cut by a file as now ordinarily done, and it is this last
part of the Invention which is applicable to the same purpose in the manufacture of
forceps and other surgical or dental instruments.