Improvements in Heel-trimming Machines.
Year: 1890

page_text: Date of Application, 1st July, 1890-Accepted, 2nd Aug,, 1890
COMPLETE SPECIFICATION.
[Communicated from abroad by ACME HEEL TRIMMER COMPANY, of Boston, in the
State of Massachusetts, United States of America.]
Improvements in Heel-trimming Machines.
I, WALLACE FAIRWEATHER, C.E., of 62 Saint Vincent Street in the City of
Glasgow, Registered Patent Agent and 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 as communicated to me to be particularly described and ascertained
in and by the following statement :---
This invention relates to heel trimming machines employing a rotary cutter, a rest
or support for the top lift at one end of said cutter, and a rest for the side of the
heel arranged below and in advance of the point where the cutter acts on the work.
The invention has for its object to provide improved means for supporting said rests
in their proper relation to the cutter, and for adjusting them to various positions, and
it consists in the improvements which we will now proceed to describe and claim.
Of the accompanying drawings forming a part of this specification, Figure 1
represents a top view of the cutter and a portion of its actuating shaft and of one of
the supporting bearings for the latter together with the top lift and heel side rests,
and the improved means for supporting and adjusting the same. Fig. 2 represents a
side view of the same, the cutter being removed and its shaft shown in section.
Fig. 3 represents a front view of the mechanism shown in Fig. 1. Fig. 4 represents
a section on line 4 4, Fig. 2. Fig. 5 represents a section on line 5 5, Fig. 1.
Fig. 6 represents a section on line 6 6, Fig. 1. Fig. 7 represents a section on
line 7 7, Fig. 2.
The same letters of reference indicate the same parts in all the Figures.
In the drawings-
may
be
a represents the rotary cutter and 6 the shaft which rotates it. Said cutter
constructed, for example as shown in United States Patent to F. N. Ethridge,
Sept. 17, 1889, No. 411,121, or it may be of any other suitable construction.
c represents a portion of the frame of the machine containing one of the bearings d
in which the shaft b rotates. e represents a cylindrical sleeve which is mounted to
rotate loosely on the bearing d and is provided at one end with a flange e¹ which is
engaged by hooks or lugs ffaffixed to the frame c, said hooks permitting the sleeve e
to rotate, but preventing it from moving endwise on the bearing d. The periphery
of the sleeve e is screw threaded and is engaged with a threaded socket formed in an
arm 9 which supports the heel rest h and top lift rest i, said rests being adjustably
secured to the arm as hereinafter described.
When the sleeve e is rotated and the arm g prevented from rotating, the screw
5 thread connection between the sleeve and arm causes the arm to be moved laterally,
thus moving or adjusting the top lift and side rests i, h, horizontally in a direction
parallel with the shaft b.
The described means of adjusting the said rests horizontally parallel with the
shaft b, viz., an arm supporting the rests, and a rotatable screw threaded sleeve
0 supported by the frame of the machine and engaged with a threaded socket in said
arm is new, and is an important part of the improvements.
The arm g is divided at g' at one side of the sleeve e and is provided with ears jj
at opposite sides of the division. Said ears receive a screw k which may be adjusted
to cause the socket portion of the arm g to bind so firmly on the sleeve, that the
15 latter cannot rotate in the arm, the arm and sleeve being thus rigidly connected.
The object of this construction is to enable the rests h, i, to be. adjusted vertically
by swinging the arm up or down as the case may be. By thus clamping the arm
upon the sleeve, the latter is caused to turn with the arm so that when the arm is
.

page_text: moved to effect the vertical adjustment of the rests, the arm and rests will not be
horizontally adjusted in the manner above described, as they would be if the arm
and sleeve were, not rigidly connected. The arm is held at any desired vertical
adjustment by means of a bolt or stud l affixed to the frame c and passing through
a segmental slot m (Fig. 5) in the lower portion of the arm g, a sleeve o on said
stud within the slot, having a flange o¹ at one end and screw threaded at the other
end, and a nut p engaged with the screw threaded portion of the sleeve.
When said nut is tightened the arm g is clamped between the nut and the flange o¹,
the arm being thus securely held at any point within the range of adjustment
permitted by the slot m.
The top lift rest is a block provided at oue side with a segmental face 2 arranged
to support the tread surface of the top lift of a heel and with a narrow lip 3
arranged at an angle to said face to support the edge of the top lift, this being a
common form of top lift rest, as shown in the Ethridge patent above named, and
in several earlier patents.
The improvements in the top lift rest relate to the means of securing it to and
adjusting it upon the arm g. On the rear side of the top lift rest is formed a
dovetail rib (Figs. 3 and 6), which is fitted to slide in dovetail guides in the
arm g.
To said rib is attached an arm s, the outer end of which is formed as a half nut
to engage one side of the threaded periphery of a screw t which is journalled in
bearings on the arm g, said screw being adapted to be rotated by a thumb piece t¹
on it's outer end without moving end wise.
It will be seen that the rotation of the screw will cause it by its described
engagement with the arm s, to move said arm and the top lift rest toward or from the
axis of the cutter, the adjustment thus effected adapting the top lift rest to the
diameter of the cutter.
V
The rest for the side of the heel is formed on a shank h¹ which passes through a
socket (Fig. 5) fitted in a slot v in the arm g, said collar being divided at 4 at one
side so that it can be compressed and caused to bind firmly upon the shank h¹.
The lower side of the slot is adapted to be pressed upwardly against the socket u
to compress the latter, by means of a screw w which is screwed into a threaded
socket in the upper side of the slot v and passes through the lower side of said slot
and has a head bearing on the lower side of the arm g. When said screw is
loosened the socket u holds the shank h¹ loosely, so that the shank may be moved
end wise to adjust the heel rest in a direction parallel with the axis of the cutter,
but when said screw is tightened it narrows the slot v sufficiently to compress the
socket u and thereby hold the shank h¹ at any position to which it may be adjusted:
The socket u is pivotally connected with the arm g by a stud x which permits the
socket to be turned to set the shank h¹ at any desired angle with the shaft b.
It will be seen that by the described devices, it is enabled not only to simul-
taneously adjust the top lift and heel rests horizontally by rotating the sleeve, and
vertically by swinging the arm g up or down, but also to adjust each rest inde-
pendently, the top lift rest having an independent adjustment toward and from the
cutter, while the heel rest has an independent adjustment parallel with the axis of the
cutter, and crosswise thereof.
The Invention is not limited to the use of two rests on the same arm, as the
arın may support only the top lift rest i, the rest & being independently supported.
Nor to the described means of securing the rests to the arm g as any other
suitable connecting devices may be employed.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed as communicated to me
I declare that what I claim is :-
1st. In a heel trimming machine, the combination with a rotary cutter and its
shaft, of the fixed bearing d surrounding the shaft, an externally threaded sleeve
surrounding and mounted to rotate loosely on said bearing; means for preventing

page_text: end wise movement of said sleeve, an arm 9 having an internally threaded socket
engaged with said threaded sleeve, and projecting forward from the sleeve, and a rest
attached to the outer end of said arm, said arm being adjustable laterally by the
rotation of said sleeve, as set forth.
2nd. In a heel trimming machine, the combination with a rotary cutter and its
shaft, of an externally threaded sleeve surrounding and mounted to rotate loosely
on the bearing which supports the shaft, means for preventing endwise movement
of said sleeve, a rest supporting arm having an internally threaded socket engaged
with the sleeve, said socket being split and compressible, and means for com-
pressing the socket and thereby securing the rest supporting arm rigidly to the
threaded sleeve, as set forth.
3rd. In a heel trimming machine, the combination with a rotary cutter and its
shaft, of a fixed hearing d surrounding said shaft, a sleeve rotatable on said bearing,
a rest supporting arm 9 clamped upon the sleeve and adapted thereby to swing
vertically, whereby the outer end of the arm and the rest thereon may be raised
or lowered, and means for positively holding the arm at any position to which its
swinging end may be vertically moved, as set forth.
4th. In a heel trimming machine, the combination with a rotary cutter and its
shaft, of an externally threaded sleeve surrounding and mounted to rotate loosely
on the bearing which supports said shaft, a rest supporting arm having an internally
threaded socket engaged with the threaded sleeve, said arm being adjustable laterally
by the rotation of the sleeve, a stud 1 affixed to the supporting frame and passing
through a slot in said arm, a sleeve o on said stud having a head bearing against
one side of the arm, and a nut p engaged with a threaded portion of said sleeve
and arranged to bear on the opposite side of the arm, said sleeve being adapted
to slide end wise on the stud, and thereby conform to the lateral adjustment of the
arm, as set forth.
5th. In a heel trimming machine, the combination of the vertically and laterally
adjustable arm g, having the top lift rest fitted to slide in guides on said arm and
provided with an arm s formed as a half nut, and a screw journalled in bearings
in the arm g and engaged with the said half nut, as set forth.
6th. In a heel trimming machine, the combination of the vertically and laterally
adjustable arm g, having the compressible slot open at one end, the split socket u
pivoted in said slot, the heel rest having a shank inserted in said socket, and the
screw w whereby the slot and the split socket therein may be compressed to hold
the shank at any position to which it may be adjusted.
Dated this Thirtieth day of June 1890.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.