Improvements in Scissors, Shears, and similar Articles.
Year: 1889

page_text: Date of Application, 23rd Nov., 1889
Complete Specification Left, 25th Aug., 1890-Accepted, 4th Oct., 1890
PROVISIONAL SPECIFICATION.
Improvements in Scissors, Shears, and similar Articles.
I, CHARLES EBENEZER CHALLIS of No. 30 Navarino Road London N.E. Machinist
do hereby declare the nature of this invention to be as follows:-
In ordinary scissors &c. each blade has its cutting edge in the same relative position
to the fulcrum, these on closing have a tendency to thrust the work forward. In my'
improved scissors shears &c. I give one blade a slight longitudinal movement upon the
other this neutralizes the forward thrust and enables a greater thickness of work to be
cut. The movement is obtained as follows: By throwing the joint or fulcrum over to
one side, that is to say, towards or beyond the cutting edge on the one blade, and
towards or beyond the back of the other blade, this gives the cutting edges different
speeds and a slight longitudinal traverse on closing; Or a pivot is fixed in one blade
and a longitudinal slot is cut in the corresponding part of the other blade, a diagonal
slot is also cut in the heel of blade and a stud put through into the first blade, thus on
opening and closing the scissors a secondary longitudinal motion is imparted; Or a
pinion is fixed in one blade and a slot and rack are cut in or upon the other blade;
Or a pivot is fixed in one blade and a slot is cut in the other, a stud is then fixed at or
near the edge of the first blade and a corresponding slot cut in the back of the other,
upon opening and closing the scissors the slotted blade turns laterally upon the pivot
and longitudinally upon the stud; Or a pivot is fixed in one blade and a slot cut in
the other and a link is jointed to the heel of one blade and to the handle of the other;
Or a pivot is fixed in one blade and a slot cut in the other, and a stud is fixed upon
one handle and a guide or channel upon the other handle.
The methods of imparting a longitudinal traverse to scissor blades indicated above
are applicable to ordinary scissors, shears &c. with slight modification and do not
require the blades &c. to be made other than ordinarily except where specified.
Dated this 02-1 day of November 1880
COMPLETE SPECIFICATION.
Improvements in Scissors, Shears, and similar Articles.
I, CHARLES EBENEZER CHALLIS of No. 30 Navarino Road, 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:-
In ordinary scissors and shears each blade has a cutting edge in the same relative
position to the fulcrum, and on closing these have a tendency to thrust the work
forward. In my improved scissors or shears I give one blade a slight longitudinal
movement upon the other this neutralizes the forward thrust and enables a greater
thickness of work to be cut. As indicated in my Provisional Specification this move-
ment may be obtained in many ways, but I prefer that hereinafter described reference
being made to the drawings which form part of this Specification and in which
Fig. 1, is an elevation indicating the position of the parts when the blades are in
their closed position the external nut being removed.
Fig. 2. is a like view with the blades open.
Fig. 3. is a plan of Fig. 1. with the nuts shown and
Fig. 4. is an elevation of a pair of small sized scissors.
For the purpose of obtaining the longitudinal travel of the blades while cutting, the
blade A is provided with a slot B through which the central pivot C passes said slot

page_text: .
being either a close fit for the pivot as shown in Fig. 4 or else being of sufficient size
to take a sliding block D as shown in Figs. 1 and 2 the latter being the preferable
construction for large scissors or shears. A second slot G is formed in blade A radial
with the central pivot. And in this works a stud F secured to blade E. With this
construction it will be obvious that on opening and closing the scissors the blades
will turn on both pivots at the same time-laterally on the pivot C which takes
the weight of the cut, and longitudinally upon stud F.
When one of the blades is provided with a knife edge prefer that both blades
should be straight and not "hollowed" or " crossed" as is usual in scissors.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
In scissors or shears the combination of longitudinal and radially slotted blades with
their respective pivots substantially as described and as illustrated in the drawings.
DL: 001 A
1000
PHILIP M. JUSTICE,
Applicant's Agent.
PHILIP M. JUSTICE,
Applicant's Agent.