Year: 1894

page_text: Date of Application, 22nd Nov., 1894
Complete Specification Left, 19th Aug., 1895-Accepted, 26th Oct., 1895
I, CHARLES EBENEZER CHALLIS of No. 30, Navarino Road, Hackney
London, N.E., Machinist do hereby declare the nature of this invention to be as
follows:-
Difficulty is experienced with those scissors and shears in which one blade is
ground to a keen edge and has a longitudinal traverse upon the other blade, owing
to the impracticability of grinding the blades perfectly straight, and the tendency
for any irregularities to cause the blades to gnaw into each other.
I obviate the difficulty and enable the grinding and subsequent sharpening to be
less carefully performed, and make the fitting up simpler and more expeditious by
fitting a slightly bowed spring under the head of the main pivot in such manner
that its edges ride upon the upper and lower edges of the heel of the keen blade;
thus the blades are drawn together at a tension sufficient to keep the edges in cut
but not sufficient to prevent them riding over the minute irregularities upon each
other. The shape of the spring may be varied by prolongation in a longitudinal
direction and forming tongues to press on the blade, or the spring may be circular
and fluted.
Dated this 22nd day of November 1894
C. E. CHALLIS.
I, CHARLES EBENEZER CHALLIS of No. 30 Navarino Road Hackney
London N.E. Machinist 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 :-
Difficulty is experienced with those scissors and shears in which one blade is
ground to a keen edge and has a longitudinal traverse upon the other blade, owing
to the impracticability of grinding the blades perfectly straight, and the tendency
for any irregularities to cause the blades to gnaw into each other.
I obviate the difficulty and enable the grinding and subsequent sharpening to be
less carefully performed, and make the fitting up simpler and more expeditious, by
fitting a slightly bowed spring under the head of the main pivot in such manner
that its edges ride upon the upper and lower edges of the heel of the blade either
by recessing it in the heel of blade under the head of screw, or by turning the
edges of the spring over the edges of the heel of blade thus the blades are drawn
together at a tension sufficient. to keep the edges in cut but not sufficient to prevent
them riding over the minute irregularities upon each other.
The shape of the spring may be varied by prolongation in a longitudinal
direction and forming tongues to press on the blade or the spring may be circular
and fluted.
In the accompanying illustrations on both sheets A is the blade; B. is the spring;
C is the screw or pivot.

page_text: Fig. 1 shows the spring recessed in heel of blade.
Fig. 2 shows the spring overlapping the heel of blade.
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:
The construction and use of a spring attachment for scissors, shears, and the like
having traversing blades substantially in the manner and for the purpose set forth
ana described.
Dated this Ninth duon
C. E. CHALLIS.