IMPROVEMENTS IN POCKET KNIVES
Year: 1880

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine, Lake,
"
& Co, Patent Agents, Southampton Buildings, London, for an Invention of
IMPROVEMENTS IN POCKET KNIVES." A communication from abroad by
Daniel Peres, of Solingen, Germany.
(Void by reason of the Patentee having neglected to file a Specification in
pursuance of the conditions of the Letters Patent.)
PROVISIONAL SPECIFICATION left by the said William Robert Lake at the
Office of the Commissioners of Patents on the 30th September 1880.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent
Agents, Southampton Buildings, London. "IMPROVEMENTS IN POCKET KNIVES."
[A communication from abroad by Daniel Peres, of Solingen, Germany.]
This Invention relates to the manufacture of pocket knives with covered springs,
and the method of manufacture, according to the present Invention, is more
advantageous than those hitherto in use, for the following reasons, that is to
say:-
The springs do not require to be strengthened or thickened at their centre for
allowing them to be pierced to receive a pin, as the latter is according to one part
of my Invention dispensed with; further the springs need not be ground or
polished on all their faces, but only on that one which is in contact with the blado
of the knife, whereby a saving of labour is effected. The adjustment of two, three,
or more springs side by side, hitherto presenting great difficulties to the workman
(as it is necessary to obtain the same horizontal level for all the springs in every
position of the blades), is by this Invention facilitated, as the springs are covered
by a back-piece formed in one piece with the side plates. By thus covering the
springs I also protect the same against corrosion.
Hitherto a separate back piece of the knife-handle was adjusted between the side
plates, and connected therewith by rivetting or soldering. Such an arrangement

page_text: is however very expensive, and contributes but little to a durable connection
of the two metal plates, and I therefore make both these plates in one piece with
the back of the handle of the knife.
For this purpose I stamp a blank of suitable form from a sheet of metal. The
central part of this blank will form the back, whilst the outer parts are bent up to
form the side-plates of the handle.
According to another part of my Invention, I make the spring at the back of the
knife quite flat, and grind it only on the inner side, where it comes in contact
with the blade, and instead of thickening, or strengthening it in one place, as
hitherto, I provide a pin at its centre, and another pin at one end thereof. In some
cases I may dispense with the central pin, and in such cases I provide the spring
with a thickened or projecting part abutting against the back of the handle. When
in two-bladed knives the two blades are fixed on one pin, the spring may be made
of one piece, and cut or split longitudinally, or two separate springs may be placed
side by side.
In a knife thus constructed the back presents a smooth appearance, the
connection of the two metal-plates is durable and solid, and one or several springs
may be so arranged therein as to be protected against corrosion.