Improvements in Sole Trimming Machines.
Year: 1896

page_text: Date of Application, 8th Dec., 1895-Accepted, 16th Jan., 1897
COMPLETE SPECIFICATION.
Improvements in Sole Trimming Machines.
I, JOHN BERRY EMERY, residing at 88 Leighton Street in the City of Lynn,
County of Essex, State of Massachusetts, in the United States of America,
Merchant, 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 :-
My invention relates to improvements in sole trimming machines, and has particular
reference to my previous invention for which Letters-Patent of the United States
No. 528467, dated October 30, 1894, were issued.
In the class of machines forming the subject of my said former patent, the soles
of boots and shoes are trimmed by a multiplicity of radial cutting blades constituting
in their entirety a circular rotary sole-trimmer, mounted and secured upon a
rapidly revolving shaft and operating in conjunction with a feather-edger having a
yielding support, to prepare the surface of the leather for the subsequent action of
the cutters, and an interlocking end wise shield to protect the vamps from mutilation,
the rotation of each being identical with the trimmer.
To insure accuracy in the assembled implement, it is imperative that the cutting
periphery in its rotations shall not vary from ninety degrees with the plane of its
shaft to trim the sole edge properly and effectively.
The peripheral cutting edges of the blades should also revolve at a precise
distance from the axis of the shaft's rotation, otherwise the trimming is done
irregularly.
To effect these objects with greater efficiency is the purpose of my present
improvement, which embraces the combination primarily of a rotating shaft
provided at the end adjacent to the trimmer with a series of shoulders and an
external cylindrical cone or taper spindle, a longitudinally slotted radially expansible
sleeve or jacket having an exterual cylindrical bearing and an internal cone or
taper bearing coacting with the identical bearing of the multi-shouldered shaft, a
sole edge trimmer adjustable over the cylindrical bearing of the sleeve and means
whereby said sleeve bearing is expanded to closely fit the bore of, and centre, the
trimmer.
My invention further comprises, in addition to the aforesaid elements, the
combination of a disk-guard interlocking with the trimmer and provided with a
central circular inside apertured depression to embrace the cylindrical end of the
revoluble shaft, a feather-edger having a yielding rearward support, a threaded
clamping bolt adapted to centre and assemble the several described parts, and means
to cushion the organized invention upon the shaft.
A more specific description of the remaining features of my improved invention
will be obtained through reference to the drawing forming a part of this specification
wherein :-
Fig. 1. is a transverse section of the aggrouped parts on dotted line 1. 1. of
Figure Two,
Fig. 2. being a longitudinal section of the organized devices on dotted line 2. 2.
of Figure One.
Fig. 3. is a plan of the underside of the feather-edger to exhibit the apertured
entral depression receiving the circular end of the shaft and admitting the
lamping screw.

page_text: Fig. 4. denotes a side elevation of the multi-shouldered shaft end, stripped of the
several devices exhibited in Figure Two.
Fig. 5. indicates an end elevation of the jacket or sleeve removed from said
shaft and
Fig. 6. a longitudinal section on dotted line 6. 6. of Figure Five, of the same
feature in perspective and also embracing a view of the gasket for cushioning the
organized devices when assembled. Corresponding characters indicate like features
throughout the several views, wherein :-
A. denotes the rotating shaft of a shoe or boot sole edge trimming machine,
having at its end adjacent to the edge trimming cutter a series of shoulders,
B. C. D. E., the portion of the shaft between said shoulders B. and C. forming
exteriorly a taper or cone-shaped spindle bearing F. within which is a central screw
threaded socket designed to receive the clamping screw G, which subserves the
two-fold purpose of confining the assembled mechanism and radially expanding
the cylindrical slotted bearing which supports the trimming cutter when forced
onto the taper F.
H. designates the sleeve or jacket having a series of shoulders I. J. K, designed
to co-act with the aforesaid corresponding shoulders on the shaft A. and an interior
cone-shaped bearing L. to embrace the shaft cone bearing F. A series of longitudinal
slots M. divide the interior cone and the cylindrical outer bearing N. supporting
the cutter, into several independent radial expansible sections O, which are
sufficiently flexible to outwardly expand or inwardly contract when the sleeve
is forced downwardly over the taper F. or retracted by the action of the
clamping serew G. indirectly through its accessories, forcing said sleeve or
jacket H. nearer the shoulder C. of the shaft, as in Figure 2; thus expanded,
the sections O. independently compensate for any inequalities of surface in the bore
of the trimmer and circumferentially true up the cutting blades in their relation to
the axis of the shaft's rotation; thus the trimmer firmly embraces the bearing of
the shaft without any lost motion. P. indicates the sole edge trimmer of any
desirable construction (as the essence of my invention obviously is to overcome
the inequalities of surface in any cylindrical bore, occasioned through wear or
otherwise) fitted upon the cylindrical bearing N. of the sleeve and seated against
its annular shoulder J. The feather-edger Q. with its helical spring V. forming
its yielding support is also seated against the flanged shoulder E. of the shaft, being
previously assembled as in Figure 2.
R. is the disk or vamp guard interlocking with the trimmer and provided
centrally with the circular depression S. to receive the shoulder B. of the shaft,
and the central aperture T. for the admission of the clamping screw G, whose action
has been previously described.
U. denotes the gasket of any elastic material which intervenes between the
shoulder D. and the larger end of the sleeve H. to form a yielding support to the
screw as it is turned into its socket.
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 :-
.I. The rotating shaft provided with a series of shoulders of differential circum-
ference and a taper, adapted to support a longitudinal slotted sleeve, the said sleeve
provided with differential circumferences and a taper adapted to embrace the said
shaft, the trimmer covering the ends of the shaft and the sleeve, and the clamping
screw arranged to enter the shaft in a manner to confine the said trimmer and
its herein described co-acting accessories, with the flexible sleeve, rigidly, upon the
shaft to obviate lateral motion occasioned by wear of the shaft end, or bore of the
cutter, substantially in the manner and for the purpose specified.
II. The multi-shouldered shaft provided integrally near its end with an external
taper spindle terminating in a circular bearing and having an internal threaded
socket; the sleeve or jacket having internally a cylindrical bore and a diminished

page_text: taper terminating at its smaller end in a circular bearing in proportion to fit the
identical bearing of said shaft, the bore and taper abutting against an annular
internal shoulder, said taper subdivided by longitudinal intersections in a manner
to form a series of expanding and contracting sectional co-acting taper and
segmental bearing surfaces, the apertured disk or shield provided at its centre-
with a circular rearward depression to receive the circular bearing of the
taper spindle and the clamping screw adapted, when the described devices
are assembled, to be turned into the threaded socket of said spindle in a.
manner to force the sleeve over the spindle taper and expand the segments
of said sleeve beyond their normal circumference, substantially in the manner-
specified.
III. The combination in a sole trimming machine of a rotating shaft provided
with a series of shoulders and an internally threaded taper spindle, a sleeve or-
jacket provided with an internal annular shoulder adapted to co-act with the
outward shoulder of the taper spindle, and an internal flexible taper bearing
conforming to the taper spindle of the shaft, a sole edge trimmer adapted to.
receive said flexible bearing provided with a hub to operate against the
outward shoulder of the sleeve to press the latter further upon the taper
spindle, a feather-edger having an independent yielding support, a vamp guard
provided with au apertured central depression and means substantially as.
described, for compressing the sleeve and its co-acting devices upon the taper
spindle to expand said flexible taper and unify the rotation of the trimmer and
shaft.
IV. The feather-edger adapted to yield before endwise pressure, the trimmer
arranged to receive the force of the guard and transmit it to the sleeve, and the
said guard provided with means to embrace the reduced circular end of the shaft.
or spindle, in combination therewith, the revoluble shaft having a taper spindle-
internally threaded, the clamping screw adapted to draw the guard against the
trimmer, the sleeve having rigid and expansible ends, the former to embrace
the shaft, the latter to embrace the taper in a manner to expand and securely fit.
the bore of the trimmer, and means to cushion the sleeve against the action.
of the screw and its co-acting devices, substantially in the manner set forth.
Dated this Twenty-first day of October 1896.
JOHN BERRY EMERY.
H. D. Fitzpatrick,
70 Wellington Street, Glasgow, Agent..
JOHN BERRY EMERY.
H. D. Fitzpatrick,
70 Wellington Street, Glasgow, Agent..