Improvements in Shears.
Year: 1892

page_text: e of Application, 8th Nov., 1892-Accepted, 17th Dec.; 1892
COMPLETE SPECIFICATION.
Improvements in Shears.
I, WALTER PLAtt Hatch, residing at South Milwaukee, in the County of
Milwaukee, and State of Wisconsin, United States of America, Manufacturer,
do hereby declare the nature of my invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
Fig. 1 is a view in side elevation of a pair of pruning shears embodying my
invention, the blades of the shears being shown in open position.
Fig. 2 is a view in side elevation from the opposite side, and showing the blades
in closed position.
Fig. 3 is an edge view of the shears, parts being broken away adjacent the pivot
bolt.
Fig. 4 is a view in transverse section on line 4-4 of Fig. 3.
Fig. 5 is a detail face view of the pivot bolt, its nut and washer for connecting
the jaws.
A and B denote respectively the two sections of my improved shears, one end
of each of these sections being conveniently shaped to form suitable handles. The
section A is provided with the hook-shaped blade a, and the section B is formed
with the sharp edged blade 6 which is preferably slightly curved upward towards its
outer end. The blade or hook a of the section A is shown as having merely a
shoulder or edge co-operating with the blade b, but if desired the blade a might
be sharpened to any desired extent without departing from the spirit of the
invention. The section A of the shears is formed with a holder to receive the
pivot bolt C and the section B of the shears is formed with a long slot b' through
which also passes this pivot bolt. The head c of the pivot bolt C is of sufficient
size to prevent the withdrawal of the bolt from the slot 6', and upon the threaded
end of the bolt C are placed the rubber washer d and the threaded nut D. The
nut D is preferably of concave convex shape or at least has its under side formed
of concave shape for a purpose to be presently stated. My object in forming
one of the sections of the shears with a slot b', through which the pivot bolt will
pass, is to provide not merely the usual pivotal movement of the shear blades
with respect to each other, but to insure also that the blades shall have a sliding
or longitudinal movement with respect to each other in order to give a drawing.
or shear cut to the blades. The sections A and B are united also by a link E that
is attached by the pivot pins or screws with the respective sections.
To the
section B of the shears is fixed a spring F, this spring being preferably attached
to the section B by a screw f', and by a lug f2 passing into a suitable seat or
perforation in the section B. The free end of the spring F bears upon the
link E and serves to normally force the sections apart, as seen in Fig. 2.
From the foregoing description, it will be seen that if the parts be in the
position seen in Fig. 2 of the drawing, and the handles of the sections A and B be
grasped to bring the sections to the closed position seen in Fig. 1, the compression
of the handles would not only serve to effect a pivotal movement of the blades a
and b with respect to each other but a sliding movement of the blades with respect
to each other will also occur. This sliding movement in the construction shown,
is due to the link E (although such movement might be otherwise produced without
departing from the spirit of the invention), this link E serving as the sections are
compressed to force forward the section A and cause the pivot bolt C to move
forward within the slot b' of the section B. As a consequence the article to be
severed, resting upon the blade or foot portion a, is forced forward towards the edge
of the blade b at the same time that it is pressed against the edge of this blade b,

page_text: "
and the "shear or draw cut" thus resulting serves to much more readily and
effectively sever the article than would be possible-if the usual pivotal movements
of the blades with respect, to each other was allowed.
My object in providing the pivot bolt with a rubber washer d and with a nut D,
having a concaved inner face, is to insure against the rotation of the nut D, and
thereby avoid the danger of the working of this nut from off the threaded end of
the bolt.
It will be seen by reference more particularly to Fig. 4 that when the
nut' D is forced firmly against the rubber washer d, it will compress this washer,
between it and the face of the section A, and as the washer is thus compressed, "it
will be expanded laterally, causing its outer portion to lap over or more or less embed
the corners of the nut D, and thereby guard this nut against rotation, since
the contact of the rubber with the face of the section A will securely hold 'the *
washer itself against danger of rotation. Moreover the rubber washer will: serve
by its elasticity to hold the blades a and b of the shears in: close-working: contact, i
and 'compensate for wear incident to long usage...
24
By preference the handle portions of the section b has a link H connected thereto,
this link being formed at its free end with an eye adapted to engage with a hookihi
at the end of the section A, when the shear sections are to be held in closed
position as shown in Fig. 2 of the drawings. 2
171111
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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
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981
.
."
I
196919.
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1.A pair of shears comprising the two sections A and B, tlie section A having
its free end formed with the 'hook-shaped portion or blade a and the section B
being formed with. the blade b, one of said sections being provided with a slot; and
the other of said sections being perforated, a pivot bolt passing through the islot
of one section and the perforation of the other section, whereby a pivotal and
sliding movement of the blade is permitted, a link E: pivotally connected to said m
sections, and a spring F connected to one of 'said sections and having its free end
bearing against said link adjacent the point of connection between said link and
the shear section to which said spring is attached, substantially as described.
2. In a pair of shears, the combination with the sections, of a bolt connecting
said sections together, a rubber or equivalent. washer, and a nut D bearing upon
said washer, said nut having a concaved inner face, and having corners d' whereby
when the washer is compressed it will be expanded laterally causing its outer
portions to embed the corners of the nut and thereby guard it against rotation,
substantially as described
Dated this 8th day of November 1892.
T.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.