Improvements in or connected with Drawing Knives.
Year: 1890

page_text: Date of Application, 21st Nov., 1890
Complete Specification Left, 20th Aug., 1891-Accepted, 10th Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements in or connected with Drawing Knives.
I, JOHN SOLOMON CANTELO, of Boston, in the County of Suffolk,
Massachusetts, United States of America, Carpenter, do hereby declare the
nature of this invention to be as follows:-
This invention relates to improvements in what are known as drawing knives,
and is carried out as follows:-
The knife blade has as usual at its ends, shanks or arms to receive the handles.
These shanks are perforated to receive screws or pins to which the handles are
pivotted. The said shanks are cach provided preferably with three locking
projections. One of said projections serves to hold the handles in a closed position
on the blade, another serves to hold the handles locked to the blade at right angles
thereto, and the third serves to hold the handles locked to the said blade shanks in,
or about in, a line with the blade.
The handles are composed of a wooden part having on one side a longitudinal
groove adapted to receive the blade when folded upon it, and each handle is
provided with a metal hinge piece having two parallel shanks which pass through
longitudinal perforations in the handle and through perforated capped top and
bottoni ferrules.
The lower ends of the bifurcated shanks are rivetted or otherwise secured to the
bottom ferrule. The upper end or head of the hinge piece is forked and is pivotted
to the shank by means of a pin, screw, or rivet. In one piece with each forked
head there is a preferably cylindrical projection, extending at or about a right
angle to the hinge piece and its handle, and in connection with it and the locking
projections on the shanks I provide a spring pressed locking device, preferably
constructed as follows: On the said hinge piece projections I provide a longi-
tudinally adjustable sleeve, having a coiled spring, the inner end of which rests
against the bottom of the sleeve and its outer end presses preferably against the
head of a screw screwed into the outer end of the hinge piece projection.
Instead of the headed screw, a pin may be passed through a transverse perforation
in the outer end of the projection for the spring to bear against.
The spring causes the adjustable sleeve to be forced towards the fulcrum of the
pivotted handle, and in so doing causes the handle projection to be locked to that
one or part of the blade projections, which for the time being is in line with it.
In changing the position of the handles, relative to the blade, it is only necessary
to move the sleeves outwards sufficiently to disengage them from the blade
projection to which they are locked, and by holding each of such sleeves in its
outer position the handles may be swung to the various required positions and then
locked in such positions by simply releasing the spring pressed sleeves.
The invention is of very simple construction and by its use the handles may be
folded upon the blade and locked, thus protecting the cutting edge from injury, or
secured to said blade in or about a line with it, or set at about right angles thereto
and locked.
1000
CHEESBROUGH & ROYSTON,
15, Water Street, Liverpool, Applicant's Patent Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in or connected with Drawing Knivės.
I, JOHN SOLOMON CANTELO, of Boston, in the County of Suffolk,
Massachusetts, United States of America, Carpenter, 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 improvements in what are known as drawing-knives and
is carried out as follows:-
The knife blade has as usual at its ends, shanks or arms to receive the handles.
The shanks are perforated to receive screws or pins to which the handles are
pivoted. The said shanks are cach provided preferably with three locking projections.
One of said projections serves to hold the handles in a closed position on the blade,
another serves to hold the handles locked to the blade at right angles thereto, and
the third serves to hold the handles locked to the said blade shanks in, or about
in, a line with the blade.
The handles are composed of a wooden part having on one side a longitudinal
groove adapted to receive the blade when folded upon it, and each handle is
provided with a metal hinge piece having two parallel shanks which pass through
longitudinal perforations in the handle and through perforated cupped top and
bottom ferrules.
The lower ends of the bifurcated shanks are rivetted or otherwise secured to the
bottom ferrule. The upper end or head of the hinge piece is forked and is pivotted
to the shank by means of a pin, screw, or rivet. In one piece with each forked
head there is a preferably cylindrical projection, extending at or about a right
angle to the hinge piece and its handle, and in connection with it and the locking
projections on the shanks I provide a spring pressed locking device, preferably
constructed as follows:-On the said hinge piece projections I provide a
longitudinally adjustable sleeve, having a coiled spring, the inner end of which
rests against the bottom of the sleeve and its outer end presses preferably
against the head of a screw screwed into the outer end of the hinge p.ece
projection.
Instead of a headed screw, a pin may be passed through a transverse perforation
in the outer end of the projection for the spring to bear against.
The spring causes the adjustable sleeve to be forced towards the fulcrum of the
pivotted handle, and in so doing causes the handle projection to be locked to
that one or part of the blade projections, which for the time being is in line with it.
In changing the position of the handles, relative to the blade, it is only necessary
to move the sleeves outward sufficiently to disengage them from the blade projection
to which they are locked, and by holding each of such sleeves in its outer position
the handles may be swung to the various required positions and then locked in such
positions by simply releasing the spring pressed sleeves.
In the annexed drawings,
Figure 1 represents a side elevation of the invention, shewing one end of the
blade and its pivoted handle in section;
Figure 2 represents a longitudinal section on the line X. X. shewn in Figure 1;
Figure 3 représents a section on the broken line Y Y shewn in Figure 1; and
Figures 4 and 5 represent in plan the top and bottom ferrules of the handles.
Similar letters refer to similar parts wherever they occur on the different parts
of the drawings.
A represents the blade as usual having at its ends the shanks or arms a, a, which
are perforated to receive the screws or pins, b, to which the handles are pivoted;
the said shanks are each provided preferably with three locking projections a¹, a²
and a³ as shewn in Figure 1. The projections a', a', serve to hold the handles in a
close: position upon the blade A, as shewn in dotted lines at the right hand of

page_text: about
Figure 1; the projections a a² serve to hold the handles locked to the blade shanks
at or about at right angles thereto, as shewn in full lines in Figure 1 and the
projections a³, a³ serve to hold the handles locked to said blade shanks in or al
a line with the blade, as shewn in dotted lines at the left end of Figure 1.
Each handle is composed of a wooden part C having on one side a longitudinal
groove c, adapted to receive the blade A when folded upon it, as shewn in dotted
lines at the right end of Figure 1. To each wooden handle C is secured the
metallic hinge piece e, having each two parallel shanks c, c, passing through
longitudinal perforations in the handle C and through perforated cupped top and
bottom ferrules d, d', having two lips which are let into the handle to prevent it
from contracting laterally, substantially as shewn.
The lower ends of the bifurcated shanks C2 C³, are riveted or otherwise secured
to the bottom ferrules as shewn in Figure 3. The upper end or head of the
hinge piece C is forked as shewn at C3 in Figures 1, 2 and 3, and is pivoted to the
shank a by means of the pin, screw or rivet b. In one piece with each forked
head C³ is made a preferably cylindrical projection C extending at or about a
right angle to the hinge piece Cand its handle C, as shewn in Figure 1, and in
connection with it and the locking projections a¹, a², a³, I use a spring pressed
locking device preferably constructed as follows: On such projection C is longi-
tudinally adjustable a sleeve E having an internal annular space or chamber e in
which is located a coiled spring e¹, the inner end of which rests against the bottom
of the chamber e and having its outer end pressing preferably against the head f
of the screw f¹ that is screwed into the end of the hinge piece projection C as
shewn.
Instead of the headed screw f', a pin may be passed through a transverse
perforation in the outer end of the projection C without departing from the essence
of my invention.
The spring e causes the sleeve E to be forced towards the fulcrum of the pivoted
handle and in so doing causes the handle projection C to be locked to that one of
the blade projections a¹, a' or a³ which for the time being is in line with it as shewn
in Figure 1 in changing the position of the handles relative to the blade it is
only necessary to move the sleeves E, E, outwards sufficiently to disengage them
from the blade projections to which they were locked, and by holding each of such
sleeves in its outer position, the handles may be swung to the various positions
shewn in full and dotted lines in Figure 1 and locked in such position, simply by
releasing the hold on the spring pressed sleeves E. E.
The invention is very simple in its construction and operation, and by its use the
handles may be locked and folded upon the blade, or secured to the latter in or
about a line with it, or at or about right angles to the same, thus enclosing and
protecting the cutting edge of the blade from injury, when the device is not in
use, and enabling the blade to be used with the handles in the positions as above
mentioned.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The blade A having each of its ends provided with locking projections and a
handle pivoted thereto, having a locking projection combined with a spring pressed
sleeve adapted to hold the handle locked to the blade in or about a line, and at or
about a right angle thereto, substantially as and for the purpose set forth.
2. The blade A having each of its ends provided with locking projections and a
handle thereto, having a locking projection combined with a spring pressed sleeve
adapted to hold the handle locked to the blade in a closed position, in or about a
line and at or about a right angle thereto, substantially as and for the purpose set
forth.
3. The blade A having at each of its ends the locking projections a', a*, and a³
and the bifurcated handle pieces C', C³, pivoted to the blade ends and provided

page_text: each with a pair of shanks C2, C3, secured to the slotted handles C combined with
the locking projection C on such bifurcated handle piece and a spring pressed
locking sleeve 1, substantially as and for the purpose set forth.
4. The improved drawing-knife, having a blade provided at its ends with one or
more locking projections, handles pivoted to the ends of said blades and means for
locking the blades and handles together, substantially as and for the purposes set
forth and shewn in the drawings.
5. The metal ferrules d d of the handles, provided with holes for the reception
of the shanks C2 C3 and with lips to prevent the wood of the handle from contracting
laterally, substantially as shewn.
Dated this 19th day of August 1891
CHEESBROUGH & ROYSTON,
15, Water Street, Liverpool, Applicant's Patent Agents.