An Improved Penknife, Chiefly Designed for Attachment
Year: 1886

page_text: Date of Application, 18th Nov., 1886.
Complete Left, 28th July, 1887.
Complete Accepted, 13th Sept., 1887.
An Improved Penknife, Chiefly Designed for Attachment
1, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex do hereby declare the nature of
this invention to be as follows:-
This invention relates to an improved pen-knife adapted to be worn upon a watch-
chain or the like.
The improved pen-knife is adapted to close automatically, and is arranged in a
simple, convenient and solid manner.
My invention will be readily understood by reference to the accompanying drawing
in which
Figure 1 is a front view of my improved pen-knife open.
Figure 2 is likewise a front view of the open pen-knife, showing the stop and groove
for retaining the knife open.
Figure shows in end view and in section through the longitudinal centre, the
pen-knife closed.
The blade f of the improved pen-knife is adapted to slide within a hollow handle c.
The movement of the blade is effected by the aid of the actuating knob a sliding in a
slot formed in the tube c which forms the handle. The slot b terminates in the
small notch d, with which engages the shank of the knob a when the pen-knife is
open.
The locking of the blade is effected by slightly rotating the same upon its longi-
tudinal axis and by a slight retrograde motion. This locked position is moreover
fixed by the action of the spring e which keeps the shank of the knob or pin a in the
notab

page_text: The closing is effected through the medium of the said spring e within which the
blade of the pen-knife passes when closed. This spring causes the closing or
backward motion of the knife blade. The said spring has a point of support on the
one hand upon the top of the handle and on the other hand upon the socket g in which
the blade is mounted and which forms a body therewith. The said socket is arranged
in the same manner as a piston and carries the knob a.
The hollow handle c terminates in a suspension ring h or it is provided with any
other appropriate arrangement for the purpose of suspending it.
It is easy to understand the operation of my improved pen-knife. Supposing the
pen-knife open as represented in Figure 1; to close the same it is sufficient to disengage
the shank of the knob a from the notch d, and then turn the knob towards the slit b.
The spring e then causes the entrance of the blade within the handle as shown in
figure 3.
The opening is effected by means of the knob a fastened to the socket or piston g,
by compressing the spring and turning the knob until the shank is engaged with the
notch d.
It is obvious that I may make the handle oval, square or of other suitable shape
in transverse section without in any way departing from the nature of the invention.
Dated this 18th day of November 1886.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.
20

page_text: to a Watch Chain.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex 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 an improved combined penknife adapted to be worn
upon a watch chain or the like. The improved penknife is adapted to close
automatically, and is arranged in a simple, convenient and solid manner.
My invention will be readily understood by reference to the drawing accompanying
my provisional specification, in which
Figure 1 is a front view of my improved pen-knife open.
Figure 2 is likewise a front view of the open pen-knife, showing the stop and groove
for retaining the knife open.
Figure 3 shows in end view and in section through the longitudinal centre, the
pen-knife closed. The blade f of the improved pen-knife is adapted to slide within
a hollow handle c.
The movement of the blade is effected by the aid of the actuating knob a sliding in
a slot 6 formed in the tube c which forms the handle. The slot 6 terminates in the
small notch d with which engages the shank of the knob a when the pen-knife is
open.
The locking of the blade is effected by slightly rotating the same upon its longi-
tudinal axis, and by a slight retrograde motion. This locked position is moreover
fixed by the action of the spring e which keeps the shank of the knob or pin a in the
notch d.
The closing is effected through the medium of the said spring e within which the
blade of the pen-knife passes when closed. This spring causes the closing or
backward motion of the knife blade. The said spring has a point of support on the
one hand, upon the top of the handle, and on the other hand upon the socket g in which
the blade is mounted and which forms a body therewith. The said socket is arranged
in the same manner as a piston and carries the knob a.
The hollow handle e terminates in a suspension ring or it is provided with any
other appropriate arrangement for the purpose of suspending it.
It is easy to understand the operation of my improved pen-knife. Supposing the
pen-knife open as represented in figure 1; to close the same, it is sufficient to
disengage the shank of the knob a from the notch d and then turn the knob towards
the slit b. The spring e then causes the entrance of the blade within the handle as
shown in Figure 3.

page_text: The opening is effected by means of the knob a fastened to the socket or piston g,
by compressing the spring and turning the knob until the shank is engaged with the
notch d.
It is obvious that I may make the handle oval square or of other suitable shape in
transverse section without in any way departing from the nature of the invention.
Having now particularly described and ascertained the nature of the said invention,
and in what manner the same is to be performed as communicated to me by my
foreign Correspondent I declare that what we claim is :-
First. A combined pen-knife and trinket constructed to close automatically in the
manner above specified.
g
Second. The combination, with a hollow handle c, of a piston or socket 9 connected
with the blade f, and a spring e which tends to force the blade into the sheath, the
piston or socket g being provided with a knob a forming part of a bayonet joint
substantially as and for the purposes set forth.
Third. The improved automatically closing pen-knife constructed substantially as
described with reference to the drawing.
Dated this 28th day of July 1887
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.