Improvements in Scissors.
Year: 1892

page_text: Date of Application, 30th Mar., 1892-Accepted, 7th May, 1892
COMPLETE SPECIFICATION.
Communicated from abroad by JAMES CRAIG, Importer, and JOHN FREDERICK
WILLIAM STRAND, both of 137, Elizabeth Street, Sydney, in the Colony of
New South Wales.]
Improvements in Scissors.
I, HENRY EDWARD NEWTON, of The Office for Patents, 6 Bream's Buildings,
Chancery Lane, in the County of London, Patent Agent, 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 :-
Ordinary scissors are usually constructed of two first class levers, that are
united together at their central parts by an ordinary screw, which is screwed in
with a screw driver. If the screw is screwed up too tight, the scissors become
very hard to work and use, but if the screw is not screwed up sufficiently tight,
the scissors do not cut the material in a satisfactory manner. Again, it frequently
happens that a screw driver is not always available, just at the time when the
central screw requires screwing up.
This invention has been specially devised for the purpose of obviating these
inconveniences, and consists in substituting for the ordinary screw, a short bolt and
nut, the nut being milled on the edge, so as to enable the user to screw up the nut
without having to seek a screw driver. Between the nut and the upper surface of
the scissors, a spring is introduced, and this spring has the advantage of giving a
certain amount of elasticity to the fulcrum joint of the scissors, and ensuring that
the scissors shall cut with greater freedom, and more cleanly.
In the accompanying drawing;
Fig. 1 is a plan view of a pair of scissors, shewing a plate spring under the
thumb nut.
Fig. 2 is a side clevation of the central portion of a pair of scissors, and shewing
the bolt, the nut, and the spring in position.
Fig. 3 is a plan view of the plate spring removed from the scissors.
Fig. 4 is an end view of the same.
A A' are the two limbs or levers of a pair of ordinary scissors.
B is the bolt,
which should be made with a somewhat large head. The shank of the bolt is
preferably flattened on two sides, as at C, so as to assist in preventing the spring
from shifting its position on the upper lever A. The plate spring D shewn in
Fig. 3, consists of a thin piece of sheet steel, with two lateral snugs or pro-
jections d. d, and with a rectangular aperture pierced through its centre, so as to
admit of the passage of the bolt. The flattened sides of the shank of the bolt
should be made to fit pretty closely to the square sides of the aperture in the
spring. The snugs d. d should fit over the bevelled edges of the upper lever A,
and will assist in preventing the spring from shifting its position on the lever.
E is the milled nut, which bears down upon the spring, and which may be readily
screwed up by the fingers of the operator, without the aid of a screw driver or
other tool. The spring will give elasticity to the fulcrum joint of the two
levers A A', of which the scissors are composed, and will materially assist in making
the scissors work with ease and regularity. It is not essential that the spring
should be of the form shewn in the drawing; other suitable springs may be used,
but the style of spring shewn is that which is considered best adapted for the
purpose.

page_text: 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 from abroad), I declare that what I claim is :-
1. Superimposing a spring upon one of the levers of which an ordinary pair of
scissors is composed, and securing the spring to the levers by means of a short
bolt and nut, the said bolt also acting as the pivot pin of the levers, as herein set
forth.
2. The combination with the pair of levers of which an ordinary pair of scissors
is composed, of a short bolt and a thumb nut, and of a spring that is introduced
between the thumb-nut and the outer surface of one of the levers, whereby the
tension, or the intimacy of contact, between the cutting edges of the levers is
regulated, equalized, and rendered more elastic as herein specified.
Dated this 30th day of March 1892.
NEWTON & SON,
Agents for the Applicant.