Improvements in Lasting Nippers.
Year: 1892

page_text: Date of Application, 19th Apr., 1892-Accepted, 21st May, 1892
DE BUIFICATION.
Improvements in Lasting Nippers.
I JAMES YATE JOHNSON of 47 Lincoln's Inn Fields in the County of
Middlesex Gentleman do hereby declare the nature of this invention (which has
been communicated to me from abroad by The Whiffen Lake Lasting Machine
Company (incorporated under the Laws of New Jersey) of Hammonton Atlantic
County New Jersey in the United States of America) and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement :-
This invention relates to certain improvements in lasting nippers which I will
describe with reference to the accompanying drawing :
Figure 1 is a perspective view of improved lasting nippers constructed according
to this invention.
Figure 2 is a view shewing the jaws open and the upper within the jaws (the
nippers in this figure are drawn to a smaller scale).
and
Figures 3, 4 and 5, are views illustrating the operation of the improved nippers ;
Figure 6 is a view shewing a jaw provided with two supplemental jaws.
It will be understood that in forcing an upper onto a last, great care must be
exercised in manipulating the nippers, so that the several sets of nippers will pull
upon their respective portions of the upper to such an extent as to bring these
portions of the upper to their respective final positions, and at the same time
prevent the tearing of leather. Consequently in machines heretofore constructed
each nipper has had to be adjusted upon the upper prior to lasting, hence the time
expended in this adjustment of each nipper was often as long if not longer than it
would take a skilled laster to last a shoe by hand.
The lasting nippers constructed according to this invention overcome the
objection noted.
A is a hollow spindle having a fixed jaw a and pivoted to this spindle at c is a
lever B, having at one end a jaw b and at the opposite end an arm so formed as
to be acted upon by a roller or stud d on a sleeve D on the tubular spindle A.
This sleeve is operated by a vertically moveable rod D' adapted to the tubular
spindle A the sleeve being connected to the said rod by a pin d' which passes
through slots a' in the tubular spindle A. Hence on the vertical movement of
either the rod D' or the tubular spindle A, the jaw b will be moved towards or from
the jaw a.
It will be understood that in carrying out this invention the above described
special construction of operating devices need not be adhered to.
In the construction illustrated the jaw a has a smooth face, and the opposite
jaw carries a supplemental jaw B' pivoted at thereto. This supplemental jaw
has a serrated or roughened gripping face e and a smooth slipping face preferably
rounded as shewn in the drawings.
The supplemental jaw B¹ is in the construction illustrated pivoted to the jaw b
at its upper end, so that it can swing on the said jaw.
•
A spring 9 on the jaw b rests against the rear of the supplemental jaw B¹ tending
to force the jaw forward so that the first portion of the supplemental jaw to come
in contact with an upper would be the smooth face fas shewn in Figure 3 and
when power is applied the supplemental jaw assumes the position shewn in
Figure 4 the portion e¹ striking against the jaw as shewn in said figure
limiting the movement of the supplemental jaw.
When the edge of the upper passes the smooth portion of the supplemental
jaw the spring forces the roughened face e against the upper which by impinging

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upon upper holds it without slipping, so that any continued pull upon the
nippers would draw the upper tightly over the last.
The pivot point of the supplemental jaw is-above the acting face of the
roughened portion, consequently when tension is applied to the upper or down-
ward, pressure is applied to the nippers, the jaws will grip the upper more
firmly, the teeth of the jaw being so cut that they will be thrown back clear
of the upper when the upper is between the smooth face of the jaw and the
opposite jaw.
By simply moving the sleeve D upward or the tubular spindle downward, the
jaws of the nippers will be readily opened so as to free the upper.
In order to allow the projecting smooth portion f to have free play in
the construction shewn an orifice a is made in the jaw a to permit the pro-
jection to pass into or through the jaw.
In Figure 6 is shewn the supplemental jaw carried by the fixed jaw a while
in the other figures the jaw is carried by the moveable jaw band in Figure 6
are shewn two supplemental jaws situated side by side, hung to a single pivot pin
but otherwise independent, each having an independent spring, and an independent
movement. This form of jaw is especially useful at the heel portion of the upper,
or at the short curves at the instep where it would be impracticable to place the
jaws having a single supplemental jaw, as the construction would have to be too
delicate in order to attain the object of this invention.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
1. The combination in lasting nippers of the main jaws with a supplemental jaw
carried by one of the main jaws the said supplemental jaw having an outer
roughened or toothed portion for gripping the upper, and an inner plain projection
extending beyond the toothed or roughened portion and serving to hold the latter
out of action until the plain projection has passed beyond the upper substantially as
herein before described.
2. The combination in lasting nippers of the two main jaws, one of which is
smooth, a supplemental jaw pivotted to the opposite main jaw the said supplemental
jaw having an outer roughened or toothed portion and an inner plain bearing portion
projecting forward beyond the toothed or roughened portion, with a spring bearing
upon the supplemental jaw to force it outwards, the plain main jaw having an
orifice into which the smooth.portion of the supplemental jaw can project when the
roughened jaw is in action substantially as herein before described.
3. The combination of the main jaws (one of the said main jaws being smooth)
with two supplemental jaws situated side by side and pivoted on the same line to
the other main jaw, the said supplemental jaws having smooth bearing faces and
roughened faces with independent springs for acting on each of the said jaws, thus
allowing the said supplemental jaws to have independent action substantially as and
for the purpose hereinbefore set forth.