рVICS I Manufacture of DUOUS SOUS.
Year: 1888

page_text: Date of Application, 28th Aug., 1888
Specification Accepted, 19th Oct., 1888
ади рVICS I
Manufacture of DUOUS SOUS.
A communication from abroad by JAMES WILLSON BROOKS, of Cambridge, in the
State of Massachusetts, one of the United States of America.
I ALFRED GEORGE BROOKES of the firm of Wm. Brookes & Son of 55 & 56
Chancery Lane in the County of Middlesex, Fellow of the Institute of Patent Agents
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:
Prior to this invention the knives or blades used in connection with rotary cutters
employed for trimming heels and soles, have commonly been attached to and made
adjustable on the hubs carrying them, by means of screws, which latter were taken
out and the knives or blades removed to be ground, and thereafter the operator has
had to put the knives or blades back into place singly and to adjust them so that their
cutting edges will occupy just the proper position to leave the cutter of standard
diameter, or leave it of its original size before grinding.
To do this each knife or blade has to be adjusted with the utmost care and then bo
fastened by the screw, and in doing so much valuable time is lost.
The object of the invention to be herein described is to produce a rotary cutter
on which the knives or blades are simultaneously adjustable so that when the cutter
becomes dull by wear, all the knives or blades may, by one operation, be simul-
taneously moved out and thus expanding as it were the cutter for a distance equal to
the amount to be removed from its blades, by grinding, to thus leave the cutter of
standard diameter, means having been provided for fastening all the knives or blades
in adjusted position.
The cutter having been expanded, the knives or blades are ground back to standard
diameter without removing them from the head.
The knives or blades herein shown have dovetailed ribs or projections which are
grasped by lips of the cutter head which latter is made in two parts to thus grasp
and hold the ribs or projections of the knives or blades.

page_text: The knives or blades of the rotary cutter have combined with them at their inner
ends, a throat, and a tread-guard, so that as the heel on the shoe is being trimmed
with the tread lift of the heel resting against the tread-guard, the edges or blades of
the cutter are prevented from trimming the outer corner of the tread lift, and the
depth to which the edge of the knife or blade may cut the corner of the tread lift
next the heel to which it is applied is limited.
The outer or small ends of the knives or blades will have cooperating with them a
rand or counter guard of usual construction which will run in the crease between the
sole and the heel part of the upper of the shoe, so that the knives or blades will not
cut the upper leather.
This invention consists essentially in a rotary trimming cutter composed of a hub,
a series of knives or blades, and means to simultaneously adjust them, and to hold
them in adjusted position, substantially as will be described.
This invention also includes a rotary cutter composed of a two part hub having
lips, combined with a series of knives or blades having ribs or projections at their
inner sides which are engaged by the lips of the hub to hold the knives or blades
in position substantially as will be described.
Also the combination with a hub, and knives or blades having teeth at their inner
sides, of a gear engaging the teeth of the said knives or blades and adapted to
simultaneously adjust them, substantially as will be described.
Also the combination with a rotary trimming cutter, and a tread guard, of a
dish shaped throat located at the inner edges of the knives or blades, substantially
as will be described.
Fig. 1 in side elevation shows a rotary cutter for trimming the hools of boots and
shoes, the dotted lines showing the outlines of the heel to be trimmed.
Fig. 2 is a partial longitudinal section of the cutter shown in Fig. 1.
Fig. 3 is a section of Fig. 2.
Fig. 4 is a front elevation of a modified form of cutter.
The shaft B1 forming part of the rotary shaft of any well known form of heel
trimming machine, has its front end threaded as shown at a¹ a², the said threads
being however made or inclined in opposite direction, the threads a¹ being left
handed, while those a² are right handed.
The threaded portion a² receives upon it the threaded portion of the head b, b¹,
the portion being shown as applied loosely to the hub of the portion b.
The inner sides as herein shown of the portions of the head, are grooved to
form lips to cooperate with a dovetailed rib or projection as 12, at the inner side of
each knife or blade ³, the said projection being provided with a series of teeth to
be engaged by an adjusting device e, herein shown as a toothed gear.
The portion of the head is made in practice to hold the blades firmly by means
of the adjusting or clamping nut e screwed upon the left handed threaded portion a¹
of the shaft.
The clamping nut e being loosened, the operator may readily turn the adjusting
device or wheel c, and simultaneously move outwardly the knives or blades 6³ to
thereby expand the cutter and thereafter the edges of the knives or blades may be
sharpened without removing them from the head, they being ground back to the
standard size desired for the cutter, and in practice this grinding is done upon a
machine, so that the cutting edges of the blades are left uniformly distant froin the
centre of the shaft B¹.
The shaft B has a collar a and back of it a throat g, the same representing a dish
shaped plate the hub of which enters loosely a space in the hub of the usual tread
guard A against which is held the tread-lift t which finishes the end of the heel h.
The throat g is notched or cut away opposite the inner edges of the knives or
blades ³, so that the blades project slightly through the said notches commencing
however at a short distance from the tread corner of the tread lift, the said throat
covering a portion of the cutting edges of the knives or blades close to the tread
guard, thus preventing the knives or blades from cutting the tread lift down to its
outer corner.

page_text: The dotted lines in Fig 2 show the outlines of the path in which the cutting edges
of the knives or blades travel, and it will be obvious that they will cut the heel
externally and leave it of a shape corresponding with the said dotted lines, assuming
however that the tread end of the heel stands squarely upon the tread guard as in
Fig. 1.
Referring to Fig. 4 showing a modification of this invention, the head a³ of the
cutter applied to a squared shaft A', is hexagonal in shape, three of the sides of the
head having secured to them by bolts as the knives or blades 63, the said blades
being slotted where the bolts are extended through them and being provided at their
inner sides with gear teeth which are engaged by the teeth of a toothed gear c¹
adjustably connected to the head by means of set screws m extended through slots n
in the said gear, the partial rotation of the said gear when the set screws m and 612
being loosened, enabling the simultaneous adjustment of the blades or knives, the
tightening up of the set screws m and 612 fixing the knives or blades securely in
adjusted position.
Prior to this invention the knives or blades of rotary trimming cutters have not
been made simultaneously adjustable, and the cutter been provided with means for
locking or retaining the knives or blades in adjusted position, and therefore it is not
herein intended to limit the invention in rotary trimming cutters to the exact form
of devices shown for effecting the simultaneous adjustment and expansion of the
cutter preparatory to grinding, for it will be obvious that many different forms of
devices may be employed which are equivalent in purpose and function to the
adjusting device or gear c herein shown and yet be within the scope of this invention.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed, 1 declare that what [
claim is:
The heroin set forth improvements in means or apparatus employed for trimming
heels and soles in the manufacture of boots and shoes that is to say.
1. A rotary trimming cutter composed of a hub, a series of knives or blades, and
means to simultaneously adjust thom, and to hold them in adjusted position substan-
tially as described.
2. A rotary cutter composed of a two part hub having lips, combined with a serios
of knives or blades having ribs or projections at their sides which are engaged by the
lips or parts of the hub to hold the knives or blades in position, substantially as
described.
3. The combination with a hub, and knives or blados having teeth at their inner
sides, of a gear engaging the teeth of the said knives or blades, and adapted to simul-
taneously adjust them, substantially as described.
4. The combination with a rotary trimming cutter, and a tread guard, of a dish
shaped throat located at the inner edges of the knives or blades, substantially as
described.
T
1009
WM. BROOKES & SON,
55 & 56, Chancery Lane, London,
Agents for the Applicant.