Improvements in Machinery for Inserting Screw-threaded Wire into Leather or other Material.
Year: 1892

page_text: Date of Application, 28th June, 1892-Accepted, 13th Aug., 1892
COMPLETE SPECIFICATION.
Improvements in Machinery for Inserting Screw-threaded Wire into
Leather or other Material.
I, JAMES WILLSON BROOKS of 108 Summer Street, Boston in the County of
Suffolk and State of Massachusetts, U.S.A. Gentleman 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:-
This invention has for its object to improve that class of machine represented in
British Patent, No. 920, dated March 3, 1876.
The machine described in said Patent has a spindle which receives a single
threaded wire which is fed out through the nose at the end of the said spindle by
gripping and feeding rolls, and the wire is inserted into the stock resting on a
suitable horn or support, the wire, while being inserted, being rotated, so that the
threads thereon are screwed into the stock.
The wire having been inserted into the sole, is cut off flush with the sole, leaving
a fastening therein.
.
In the machine referred to the spindle is rotated continuously, and the gripping
and feeding rolls carried by the spindle, at the lower end thereof, have imparted to
them an intermitting movement in the direction to feed the wire from the nose at
the end of the spindle, they being moved once during each rotation of the cam-
shaft:
The gripping and feeding rolls referred to, derive their intermitting movements
from a cam on a cam shaft driven from the worm on the spindle referred to.
In the machine described, the spindle is mounted in bearings in a head, and the
weight of the wire added to the weight of the head and its parts, results in very
considerable strain being put upon the machine when the head has given to it its
rising and falling, and also its lateral vibrating movements as when the shoe is being
fed, and because of its weight, it has been found impracticable to rotate the spindle
above a certain speed and do good work.
Owing however to the great competition in the manufacture of shoes, it became
a great desideratum to increase the effective speed of operation of the machine
referred to, as such increase of effectiveness lessens the cost of production of boots
and shoes thereon.
In attempts to solve this problem and increase the effectiveness of the particular
machine under consideration, it was found that the speed of the spindle could not
be safely increased, but rather ought to be reduced; but after considerable experi-
ment, it was discovered that the cam shaft actuated by the spindle might be made to
actuate not only the gripping and feeding rolls, but the wire cutting and the head
lifting and head vibrating or feeding devices, twice during each complete rotation
thereof, instead of once, as in the Patent referred to, and this made it possible to
reduce the speed of rotation of the spindle, and yet do nearly double the amount
of work.
In the invention to be herein described the cam shaft referred to has been
provided with cams and devices which, instead of actuating the wire gripping and
feeding rolls, and the wire cutting devices, and the devices for lifting the head and
vibrating it laterally to effect the shoe feeding movement once during each
rotation of the cam shaft, actuate said devices twice during each rotation of the
cam shaft.
The said machine so altered in construction is adapted for the use of the two-
threaded wire, represented in British Patent, No. 12727, dated September 20th,
1887, the said wire having a steeper pitch than the single threaded wire which has
always been used in said machine.

page_text: .
i
Fig. 1, in side elevation, represents a sufficient portion of a machine embodying
this present invention to enable the same to be understood.
Fig. 2 is a front elevation of the parts shewn in Fig. 1.
Fig. 3, is a left-hand side elevation of the parts shewn in Fig. 1, but with the
spindle rotated about 90° from its position shewn in Fig. 1.
Figs. 4, 5, 6 and 7, are details of the cams to be referred to, and
Fig. 8, is a sectional detail of the spindle, its slide and attached parts.
The standard C, the spindle D, through which the wire to be used is fed, it being
taken from a suitable spool F, the pulley F, fast on the said spindle, and rotated
by a suitable belt driven by a suitable pulley, not shown; the worm G on the said
spindle; the enlargement I at the lower end of the spindle; the feed rolls H.; the
toothed slide J; see Fig. 8; the threaded sleeve c connected to the upper end of
it, and provided with a loose collar c²; the gear having a groove equal to one-
half the diameter of the wire, the said groove being opposite a groove in the slide J;
the sleeve upon which the gear is mounted; the pawl i carried by the said sleeve,
the ratchet wheel actuated by the said pawl, the said ratchet wheel being
mounted upon a shaft provided at its opposite end with a pinion j²,
which engages
an intermediate gear 3 which, in turn, engages a pinion j, fast on one end of one
of the gripping and feeding rolls H, having worm-like teeth to engage the threads
of the wire, the bearing plate H2 containing the bearings for that one of the grip
and feed rolls which is not rotated positively by the gearing described, the bar m
connected to the loose collar c², three-armed lever K having at one end a roller or
other stud, the rod resting on the stop o, the spring p, and sleeve nut the wire-
severing cutters s, there being in practise two such cutters, set screw r, the head E
in which the spindle D has its bearings, and which also has bearings for the cam
shaft S; the arms t, one for each member of the cutter, the nose D³; the lever M,
instrumental in actuating the arms t carrying the cutters to cut the wire off close to
the surface of the sole; the vertical rod or pin N, shewn in Fig. 3; the hollow post
N2, the arm N³ projecting from the post №2; and provided with a roller or other
stud, the hollow sleeve B, the vertical rod U, the lever V to which the upper end
of the said rod is adjustably connected, said lever at its inner end having a roller or
other stud, and the worm gear G fast on the cam shaft S and rotated by the
worm G, are and may be all as represented in the said Patent No. 920 for 1876,
where, with the exceptions of the letters S used for the cam shaft, the same letters
· are used to designate the same parts.
22
72
In the machine referred to the cam shaft at each rotation, actuates the gripping
and feeding wheels once to effect one feeding movement of the threaded wire; but
herein the cam shaft S has been provided with a cam A, see Figs. 1 and 6 (the
latter fig. showing the said cam developed), which has two cam projections 2, 3,
adapted to act upon and move the lever and effect the intermittent movement of
the rotating gripping and feeding wheels H twice during each rotation of the said
cam shaft S, thus feeding through the spindle enough wire for two fastenings instead
· of one as heretofore.
The cam groove 4 in the cam P has also been so shaped that it, acting upon
the roller or other stud carried by the arm N³ of the rocking sleeve N2, will
effect the lateral vibration of the head E twice during each rotation of the cam
shaft S.
Fig. 7 shews the cam R in face view, the said cam having a cam groove 5 into
which enters a roller or other stud on the lever V, so that that cam moves the
lever V twice during each rotation of the cam shaft S and lifts the head E twice so
as to remove the pressure of the nose and parts above the stock to permit the same
to be fed on the horn or other usual work support, not shown, but which in practise
will be as common to said Patent.
The cam shaft S also has its cam A provided at its periphery with two toes 7,
each of which during one rotation of the said cam shaft acts upon a projection 8 at
the upper end of the lever M, common to the said Patent, and moves the said lever
twice during each rotation of the said cam shaft to cut off at two distinct, different

page_text: times, the wire, and sever the same close to the stock, thus making two complete
fastenings during each rotation of the said cam shaft.
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 :-
:-
In a machine for inserting screw-threaded wire into soles of boots and shoes or
similar surfaces of leather or other material, the following instrumentalities, cis. :-a
rotating wire-containing spindle; gripping and feeding rolls carried by said spindle
and adapted to grip and feed the threaded wire longitudinally; a cam-shaft; the
lever V a double cam to actuate it twice during each rotation of the cam-shaft ;
the rocking sleeve N2; a double cam to rock it twice during each rotation of the
cam-shaft; a lever M, and projections 7 to actuate it twice during each rotation of
the said cam-shaft, substantially as described.
Dated the 27th day of June 1892.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.