Improvements in Pocket Knives and other like Closing Implements.
Year: 1893

page_text: Date of Application, 25th Feb., 1893
Complete Specification Left, 25th Nov., 1893-Accepted, 30th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Pocket Knives and other like Closing
Implements.
I, JOHN GREEN of Primrose Cottage, Ecclesfield in the County of York,
Manufacturer, do hereby declare the nature of my invention to be as follows:-
This invention relates to a novel method of, and the means for opening or partially
opening the blades or other instruments fitted into pocket knives, or other similar
closing implements, without the use of the finger nails, and so that the blade or
implement when partially opened may be then taken between the fingers and fully
opened.
In one method of its application to a single blade pocket knife, for example, I
propose to use a lever placed longitudinally in the blade recess, between the two
sides, one end bearing under the tang of the blade, and the other end terminating
with a small knob, ring, or equivalent device projecting beyond the opposite end of
the knife haft or handle.
The said lever is bent or otherwise shaped so as to form a fulcrum which at
this point rests upon the back spring, and to prevent it moving out of position
longitudinally a pin may pass across the hollow of the bend or other suitable
means may be employed.
The lever is capable of a limited amount of action upon its fulcrum, and this is
effected by pressing down the projecting knob or like device before mentioned, a
conveniently placed spring returning it to its normal position if necessary.
When the parts are so constructed, and the projecting knob is pressed down,
the opposite end of the lever raises and opens the blade to a position where it will
remain, until opened to its full extent by the fingers. The pressure exerted by the
lever in raising the blade in this case acts also directly upon the back spring and
to some extent relieves the blade from the full pressure.
Although I have described a method of carrying out my invention in a single
bladed knife for example in order to clearly illustrate the nature of the invention,
I do not confine myself to this particular arrangement as I may modify the
construction and application of the lever or an eccentric or other appliance, the
main feature being the application of leverage, pressure by an eccentric to
the underside of the tang of a blade by means of which it may be raised out of
the handle.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Pocket Knives and other like Closing
Implements.
I, JOHN GREEN of Primrose Cottage, Ecclesfield in the County of York,
Manufacturer, 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 a novel method of, and the means for opening or
partially opening the blades or other instruments fitted into pocket knives, or other
similar closing implements, without the use of the finger nails, and so that the

page_text: blade or implement when partially opened may be then taken between the fingers
and fully opened.
In one method of its application to a single blade pocket knife, for example, and
which is illustrated in the annexed sheet of drawings.
Fig. 1, being a view of the interior of a pen knife when the blade is closed.
Fig. 2, a view of same when the lever has raised the blade.
I propose to use a lever A, placed longitudinally in the blade recess, between
the two sides, one end A³, bearing under the tang T, of the blade B, and the other
end terminating with a small ring R, knob, or equivalent device projecting beyond
the end of the knife haft or handle.
The said lever A, is bent or otherwise shaped so as to form a fulcrum at F,
which at this point may either rest upon the blade spring, and be retained by a
pin passed across the hollow of the bend or preferably may have a pin F, passed
through it, upon which it works.
The lever A, is capable of a limited amount of rotary action upon its fulcrum,
and this is effected by pressing down the projecting ring R, or like device before
mentioned, a conveniently placed spring S, returning it to its normal position.
When the parts are so constructed, and the ring R, or other projection is pressed
down, the opposite end of the lever raises and opens the blade to a position where
it will remain, until opened to its full extent by the fingers, or if the action of the
lever is continued beyond this point the blade will open to the position indicated,
by the action of the spring. The pressure exerted by the lever in raising the
blade in this case acts also directly upon the back spring C, and to some extent
relieves the blade B, from the full pressure.
Although I have described a method of carrying out my invention in a single
bladed knife for example in order to clearly illustrate the nature of the invention,
I do not confine myself to this particular arrangement as I may modify the
construction and application of the lever, the main feature being the application
of a lever to the underside of the tang of a blade by means of which it may be
raised out of the handle.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
In a pocket knife or other like closing implement, a lever, or arm one end of
which is arranged to bear against or engage with the underside of the tang of the
blade (or other implement,) so that by pressing down the opposite end of the lever
or arm, the blade is raised to a stationary position convenient for opening by hand,
substantially as hereinbefore described and illustrated.
Dated the 24th day of November 1893.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.