Improvements in Scissors, Shears, and like Instruments.
Year: 1893

page_text: Date of Application, 5th Jan., 1893
Complete Specification Left, 5th Oct., 1893-Accepted, 11th Nov., 1893
PROVISIONAL SPECIFICATION.
Improvements in Scissors, Shears, and like Instruments.
I, ERNEST NOWILL of Ranmoor, Rosendale Road, West Dulwich in the County
of Surrey, Manufacturing Cutler do hereby declare the nature of this invention to
be as follows:-
The invention relates to improvements in scissors, shears, and like instruments.
It is well known that the cutting action of scissors and like instruments is much
improved by causing one of the blades to move longitudinally in relation to the
other, as the blades close or are brought together, and many devices have been
suggested for effecting this object, but they have been so clumsy and unsightly as
to be unsuitable for application to ordinary scissors, and furthermore they have
been of such a character as to add considerably to the cost of production of the
article.
Now the object of my invention is to obtain a simple device by means of which
the required movement will be imparted to the blades, or one of them to produce a
draw cut, whilst avoiding the objectionable features above pointed out.
For this purpose, I form the heel or shank of one of the blades with a slot therein
extending longitudinally of the blade, and either straight or curved, and through
this slot I pass the headed screw rivet which connects the blades together, and
which forms the pivot or axis upon which they turn.
This connecting screw or pivot may be rivetted in the ordinary manner, but I
find it advantageous to screw it into a spring nut which bears upon the shank of
the opposite blade, and I thus hold the blades together with a spring pressure.
In the shank of the opposite blade between the bow and the pivot or axis, I form
a curved cam slot, which extends outward and upward from a point in aligument
with the pivot, and between the pivot and the bows, and through this slot I pass a
headed guide stud which screws into the shank or heel of the first blade, and
occupies a position in alignment with the pivot and at the commencement of the
curved slot of the opposite blade assuming the blades to be in their closed or
normal position.
I preferably provide the pivot and the guide stud with anti-friction rollers to
work within the respective slots and thus reduce the friction of the parts.
By these means, when the blades are opened they will turn upon the pivot or
axis, but at the same time the curved slot of the opposite blade acting upon the
guide stud will cause the first blade to advance a given distance, and this
movement will be reversed upon the closing of the blades, thereby producing the
desired draw cut.
Dated this 5th day of January 1893.
WHITE & WOODINGTON,
27, Southampton Buildings, London, Agents.
COMPLETE SPECIFICATION
Improvements in Scissors, Shears, and like Instruments.
I, ERNEST NOWILL of Ranmoor, Rosendale Road, West Dulwich in the County
of Surrey Manufacturing Cutler, 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 :—
The invention relates to improvements in scissors, shears, and like instruments.
It is well known that the cutting action of scissors and like instruments is much

page_text: improved by causing one of the blades to move longitudinally in relation to the
other, as the blades close or are brought together, and many devices have been
suggested for effecting this object, but they have been so clumsy and unsightly as
to be unsuitable for. application to ordinary scissors, and furthermore they have
been of such a character as to add considerably to the cost of production of the
.article.
Now the object of my invention is to obtain a simple device, by means of which
the required movement will be imparted to the blades or one of them to produce a
draw cut, whilst avoiding the objectionable features above pointed out.
For this purpose I form the heel or shank of one of the blades with a slot therein
extending longitudinally of the blade, and either straight or curved, and through
this slot I pass the headed screw rivet which connects the blades together, and
which forms the pivot or axis upon which they turn.
This connecting screw or pivot may be rivetted in the ordinary manner, but I
find it advantageous to screw it into a spring nut which bears upon the shank of
the opposite blade, and I thus hold the blades together with a spring pressure.
In the shank of the opposite blade between the bow and the pivot or axis, I form
a curved cam slot which extends outward and upward from a point in alignment
with the pivot, and between the pivot and the bows, and through this slot I pass a
headed guide stud which screws into the shank or heel of the first blade, and
occupies a position in alignment with the pivot, and at the commencement of the
curved slot of the opposite blade, assuming the blades to be in their closed or
normal position.
I preferably provide the pivot and the guide stud with anti-friction rollers to
work within the respective slots, and thus reduce the friction of the parts.
By these means, when the blades are opened, they will turn upon the pivot or
axis, but at the same time the curved slot of the opposite blade acting upon the
guide, stud, will cause the first blade to advance a given distance, and this
movement will be reversed upon the closing of the blades thereby, producing the
desired draw cut.
And in order that the said invention may be more clearly understood and readily
carried into effect, I will proceed, aided by the accompanying drawings more fully
to describe the same.
DESCRIPTION OF THE DRAWINGS.
.
Figure 1 is a side view of a pair of scissors constructed according to the present
invention, and showing the blades closed.
Figure 2 is an opposite side view thereof.
Figure 3 is an edge view thereof.
Figure 4 is a similar view to Figure 1, but showing the blades opened out in
readiness to make a cut.
Figure 5 is a side view of a portion of a pair of scissors representing a slight
modification.
Figure 6 is a vertical section thereof taken on the line 11 of Figure 5, and
Figure 7 is a similar view to Figure 6, but representing a further modification.
In the several figures like parts are indicated by similar letters of reference.
Referring to Figures 1 to 4 a b represent the blades of the scissors, and a¹ b
represent the bows thereof.
One a of the blades is formed with a straight slot a therein, extending
longitudinally of the blade, or such slot might be more or less curved if desired,
and through this slot a² is passed the ordinary headed screw rivet c which screws
into a tapped bole formed in the blade b, and connects the blades ab together, and
- thus forms the pivot or axis upon which they turn, and this screw or pivot e may if
desired be rivetted over in the ordinary manner, or it may screw into a spring nut as
hereinafter more fully described with reference to Figures 5 and 6.
In the shank of the opposite blade 6 between the bow b¹ and the pivot or axis cis
formed a curved slot 6 which extends outward and upward from a point in

page_text: alignment or nearly so with the pivot or axis c and between the pivot c and the
bows a 6 and through this curved slot is passed a headed guide stud d which
screws into the shank or heel of the blade a, and occupies a position in alignment
or nearly so with the pivot c and at the commencement of the curved slot 2 of the
blade assuming the blades to be in their closed or normal position and as
represented at Figures 1, 2, and 3.
In the example given at Figures 5 and 6, in lien of screwing the pirot c into the
blade it is screwed into a spring nut c' which bears upon the shank of the opposite
blade and thus holds the blades a b together with a spring pressure and in order
to reduce the friction of the working parts when the invention is applied to heavy
shears and the like the pivot c and guide stud d are provided with anti-friction
rollers ed which work within the respective slots a² and considerably lessen the
power required to be exerted in performing heavy work such as cutting through
several thicknesses of cloth or the like, but in other respects the device is similar to
that hereinbefore described.
In the example given at Figure 7, in lieu of employing a curved slot b² in the
shank of the blade b, a shallow curved groove 63 is formed in the inner face thereof,
whilst a guide stud d fixed in the shank of the blade a, and entering the curved
groove is employed in lien of the screw stud d, but the action of this device is
similar to that of the arrangements previously described.
By the means herein before described when the blades ab are opened in the
manner indicated at Figure 4, they will turn upon the pivot or axis c, but at the
same time the curved slot 62 of the opposite blade bacting upon the guide stud d
will cause the blade a to advance a given distance as indicated by the dotted line
in Figure 4, and this movement will be reversed upon the closing of the blades,
thereby producing the desired draw cut.
Although I have hereinbefore described the cam slot as curved, a somewhat
similar but inferior effect may be obtained by making it inclined, but I prefer the
former arrangement.
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 a pair of scissors or the like, in which the blades are formed on or fixed with
the shank, the combination of a straight or curved slot in one blade, through which
the pivot passes to the other blade, a curved or inclined cam slot or its equivalent
in one blade and a guide pin fixed in the opposite blade, engaging said cam slot or
the like, all in manner substantially as herein shown and described, and for the
purpose stated.
Dated this 5th day of October 1892.
WHITE & WOODINGTON,
27, Southampton Buildings, London, Agents.