Improvements in Boot and Shoe Heel Trimming Machines.
Year: 1892

page_text: Date of Application, 14th Jan., 1892
Complete Specification Left, 14th Nov., 1892-Accepted, 14th Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in Boot and Shoe Heel Trimming Machines.
1, ALFRED BURKE FOWLER, Engineer and General Manager of the
Rockingham Machine Company of Exeter, County of Rockingham, State of New
Hampshire, in the United States of America, do hereby declare the nature of this
invention to be as follows:-
This invention relates to improvements in boot and shoe heel trimming machines
to expediate the operation of paring trimming and randing the heels of boots or
shoes automatically. The operation of the machine being carried out in the
following manner. After the boot or shoe has been properly secured on the jack
or shoe holder and the machine set in motion, the jack frame rotates half a
revolution carrying the shoe around to the cutter or paring tool after which the
jack frame is temporarily locked in position. The cutter being automatically
brought in contact with the heel and automatically adjusted thereto; the shoe
holder turning mechanism hereafter described is then automatically set in motion
to cause the heel to be turned from breast to breast in contact with the cutting or
paring tool, while this is taking place an untrimmed heel with its boot or shoe is
being adjusted and secured on the opposite jack or shoe holder. After the heel
has been trimmed, the shoe holder turning mechanism is automatically stopped and
locked, while the cutting or paring tool is automatically withdrawn from contact
with the heel, or out of the path of the next heel to be trimmed when the. jack
frame is released and swung round to bring the finished heel in front of the
operator and carry the untrimmed heel into position on the opposite side. The
machine is constructed in the following or equivalent manner, suitable vertical
standards are secured to a base plate at proper distances apart, their upper ends
being tied by a horizontal brace, to the base plate is secured a step or bearing in
which is journaled a vertical drive shaft, the upper end of which is journaled
preferably in a bearing in the horizontal brace or other suitable stationary part of
the machine. The said drive shaft is set in a quick rotary motion by suitable belt
power applied to its pulley, the said shaft passing upwardly through a blower,
having a suction pipe terminating in its upper end as a hood, a suitable delivery
pipe from the blower being carried to the front of the machine as usual, a fan
having suitable blades being secured on a shaft within the blower as is common in
air forcing apparatus. To the suction pipe or other stationary part of the machine
is secured in a suitable manner a vertical post or standard, a secondary or inter-
mediate shaft is universally jointed to the blower shaft. The upper end of which
is journaled in a bearing pivoted to a longitudinally adjustable spindle or rod
adapted to slide in a bearing in the vertical post or standard; on the spindle or rod
is a spring to assist in automatically holding the cutting or trimming tool with a
yielding pressure against the heel of the boot or shoe during the trimming
operation; the upper end of the secondary shaft is also universally jointed to a
cutter carrying shaft, the upper end of which is journaled in a bearing with side
trunnions adapted to rock and also slide forward and back in grooves, or grooved
guides in a bracket secured to the rear standard of the macbine. To the said
bearing is pivoted a rod or spindle adapted to yield longitudinally in a sleeve, which
latter is longitudinally adjustable within a sleeve or bearing, pivoted to a bracket
holding the upper end of the tool carrying shaft, interposed between the forward
end of the adjustable sleeve, and its bearing is a spring employed for automatically
holding the cutting tool with a yielding pressure against the contour of the heel to
be trimmed and on the outer end of the rod of the adjustable sleeve a spring is put

page_text: for regulating the tension of the spring in holding the cutting or trimming tool
against the heel to be operated on.
On the tool carrying shaft is splined a longitudinally adjustable moulded
trimming cutter, or trimming tool provided with a rand or welt cutting edge and
rand guide made in the form of a non-rotary projection journaled on the hub of the
cutter, or on the cutter shaft having a key in the plate thereof fitting in a collar
mounted upon the cutter shaft, the said rand guide is deep on its outer circular
face and is adapted to enter the rand groove on the boot or shoc, and is
longitudinally adjustable with the moulded trimming cutter, and prevents the shoe
upper from being cut or damaged by contact with the latter. The said rand guide
may to equal advantage be made in the form of a loosely, rotating disc journaled on
the cutter or on its shaft if so desired.
The collar of the cutter shaft immediately below the rand guide is pivoted to
a rod or spindle longitudinally adjustable in a sleeve hung or pivoted to the rear
. standard.
A spring is interposed between the forward end of the adjustable sleeve and an
enlarged and shouldered forward end of the rod or spindle so as to cause the cutting
or trimming tool to conform automatically to the contour, or inequalities of the
heel that is being trimmed. The movement of the cutting tool in presenting it to
the heel of the boot or shoe is automatically regulated according to the pitch of
the heel by screw nuts on pivots to levers, in vertical slots in bearings attached to the
rear standard adapted to move outwardly and inwardly at the time the back of the
heel is set over, a fork at the upper end of each lever fitting and pressing against
the near end of the adjustable sleeves mounted upon spindles or rods connected to
the cutter and top bracket. The lower ends of the levers carry rollers, working in
a grooved cam fitted on a side shaft revolved by mitre gear at its inner end and
under the worm wheel of the automatic mechanism hereinafter described. Above
the cutter is loosely journaled on its hub or shaft, a circular disc or idler which is
automatically brought to bear against a top lift template hereafter described.
Springs, one or more serve to hold the disc or idler against the top lift template
by which arrangement the rotary cutter is held with a proper pressure against the
heel during the operation of trimming or paring the same. To the bearing of the
universally jointed shaft is attached a lip or stop to keep the cutter from dropping
too low.
The cutter shaft and its intermediate shaft are automatically withdrawn so as to
release the moulded trimming cutter from contact with the heel at the finish of the
operation of trimming the heels, and to hold it in such a released position until a
new heel is swung into position ready to be trimmed, this is accomplished by a
continuously rotating cam acting on a pivoted lever, and having a link connected
thereto and to the lower end of a vibratory lever pivoted to the rear standard and
adapted to be brought in contact respectively with adjustable projections on the
upper and lower spindles. A suitable jack frame is secured to the upper end of an
only rotating shaft journaled in bearings in the frame of the machine;
such rotation of the jack frame is caused by means of spur gear secured to an up
shaft in front of the machine and intermediate connecting mechanism from a
driving pulley arranged on short shaft at side of the machine.
To the said gear is secured a disc having two dianetrically opposed locking
recesses adapted to receive a locking pin actuated by a cam on the continuously
rotated worm shaft and a spring acting on a collar secured to a vertical rod
parallel with the said shaft for the purpose of holding the jack frame stationary
while a heel is being trimmed and automatically releasing it when finished.
On the spindle of the jack frame is loosely journaled a sleeve provided with a
worm wheel meshing in the teeth of a worm loose on a cross worm shaft, which
latter is continuously rotated from the driving pulley and another pulley by the
medium of a belt leading from the latter to a pulley on the cross worm shaft. The
driving pulley is preferably loosely journaled on the driving shaft, and the other
pulley made fast thereon, a friction clutch is splined on the said shaft and normally

page_text: connected to the driving pulley by the influence of a spring in rear thereof on the
said shaft during the operation of the machine.
If it is desired to stop the machine a treadle lever is depressed and locked
beneath a projection on the base plate, and the said treadle lever is attached to a
side shaft journaled in stationary bearings on the side frame of the machine, the
said shaft having secured to it a lever jointed at its upper end to a collar on the
friction clutch above mentioned. When such treadle lever is released from under
the projection the clutch is forced in contact with the interior of the driving
pulley by the influence of the spring before mentioned. I do not confine myself to
this or any particular form of device for starting or stopping the machine, for any
well known contrivance may be employed if so desired.
To the sleeve on the main jack frame spindle is attached a spur gear the teeth
of which mesh in the teeth of intermediate gears loosely journaled on spindles
secured to the under side of the jack frame. Each train of gears mesh into the
teeth of another loose gear journaled on a pin also secured to the under side of the
jack frame, and each train of gears mesh into the teeth of an irregular gear loosely
journaled one on each of the shoe holder shafts-each of the shoe holder shafts ís
journaled in a bearing which is radially adjustable in a slot in the jack frame for
the purpose of properly presenting the heel to the action of the moulded trimming
cutter with a minimum movement of the cutter shaft. Such radial adjustment of the
shoe holder shaft is automatically accomplished by means of a grooved cam secured to
the intermediate gear, which cam has a groove adapted to receive a pin or pin and roll
connected in a suitable manner to a radial adjustable bearing in rear of the said cam.
To each of the radially adjustable bearings is attached a pin adapted to slide in
a bearing in the jack frame to steady the aforesaid bearings as they are moved
radially relative to the jack frame. The object of the irregular gears on the shoe
holder shafts is to cause an oscillating motion to be imparted to the shoe holder
shafts with freedom of radial adjustment relative to the jack frame for the purpose
of properly presenting the heel to the action of the cutter and move in the contour
of the heel from breast to breast. Upon the lower end of each shoe holder shaft is
splined and longitudinally adjustable thereon a clutch adapted to interlock with
a corresponding clutch on the under side of the respective irregular loose gears.
To each of the said clutches is pivotally connected a lever hung on a pin and
normally actuated by a spring preferably arranged on a pin for the purpose of
holding the clutch locked to the irregular gear and thereby causing the shoë
opposite to the trimming tool to be turned from breast to breast of the heel during
such trimming operation. The other clutch is automatically disengaged from its
gear by its lever coming in contact with and resting on a stationary cam projection
secured to the framing or other stationary part of the machine to allow of the
removal of the trimmed heel and its replacement by another. The shoe holder has its
lower portion secured in a suitable manner to the shoe holder shaft jack spindles are
provided one for each of the shoe holders, which spindle is preferably screw threaded
in its lower end, and adjustably secured to the lower hub of the shoe holder, so as to
cause the said jack spindle to be longitudinally adjustable relative to the trimming
tool, so as to bring the rand groove on a boot or shoe in a position corresponding
to that of the rand guide on the cutter. During the operation of the machine the
boot or shoe is supported upside down on the jack spindle and clamped in position
by means of a pressure screw spindle journaled in a bearing in the upper part of
the shoe holder and adapted to be turned by means of a handle or hand wheel
secured to its upper end, the said pressure screw spindle works in a vertically
adjustable internally screw threaded sleeve, which is prevented from turning
around its axis during its up and down movement, and has in its lower end
preferably a dove tailed groove adapted to receive a correspondingly shaped dove
tailed projection on the top of the heel template, on the top of the heel template is
a stop projection adapted to be brought in contact with the side of the sleeve upon
the template being brought in its proper position relative to the said sleeve; and
upon the under side of the template is a ledge or stops against which the breast of

page_text: the boot or shoe heel is held during the trimming operation. Each shoe holder
bearing has at its outer end a stop projection against which the lower part of the
shoe holder is brought to bear when the said shoe holder is swung into its proper
position for presenting the heel to the action of the cutter; such projection
serving as a stop to limit the rotary motion of the shoe holder, as well as a means
for holding the shoe holder shaft clutch in a proper position so that it may be
engaged with the clutch on the irregular gear shortly after the spring pressed
clutch lever is released from the stationary cam or, projection fitted on the front of
the frame. In the operation of the machine, the jack frame is rotated while the
sleeve and its gear are held stationary and "vice versa as will be hereinafter more
fully described.
"
The mechanism for intermittently rotating the jack frame is constructed in the
following manner. Upon the continuously rotating worm shaft is loosely journaled
a bevel gear, having a clutch adapted to be engaged with a sliding clutch splined
on the shaft. The teeth of the bevel gear mesh in the teeth of a bevel gear
secured to the upper end of a shaft journaled in a stationary bearing and having
secured to its lower end a pinion geared to the gear on the jack frame spindle by
means of an intermediate gear. It will thus be seen that a rotary motion is
imparted to the jack frame from the cross worm shaft by locking the clutches
together, and when the sliding clutch is disconnected from the other clutch the
jack frame remains stationary. The inner worm meshing in the teeth of the worm
wheel is also loose on the worm shaft and the said worin has in one of its ends a
clutch adapted to engage with the sliding clutch on the same shaft.
The worm loose upon the shaft serves for the purpose of intermittently oscillating
the shoe holders from breast to breast of the heel of the boot or shoe, which is
accomplished by the sleeve and its gear meshing by means of the intermediate gears
in the teeth of the irregular gears on the shoe holder shafts. To the end of the
cross worm shaft is also secured firmly a worm meshing in the teeth of the worm
wheel which is secured to a shaft journaled in stationary bearings on the frame of
the machine. The said worm wheel has on its top an outer cam for withdrawing the
cutting tool from the heel, and upon its shaft a cam for actuating a locking pin by
which the disc and its gear are held stationary during a portion of the rotation of
the said gear as above mentioned.
In addition to the outer cam the gear has also arranged on its top an inner cam
for automatically shipping the clutch for engagement with their respective clutches,
there being for this purpose arranged a shipper bar adapted to slide in stationary
bearings, and has secured to it an arm or projection adapted to enter an annular
groove in the longitudinally moving clutch, the shipper rod being moved in one
direction by means of a cam acting on a pin or projection on the said shipper rod,
and in the opposite direction preferably by means of a spring located on the shipper
rod between a collar and the stationary bearings. On the underside of the worm
wheel is arranged a face cam which actuates a lever attached to a shaft located in
a stationary bearing on the frame of the machine, such shaft having also attached
to it, a slotted lever through the slot of which passes a pin or projection attached
to the clutch the levers being actuated in one direction by the said cam and the
opposite direction by a spring on the before mentioned shaft. The object of this
is that the clutch and its worm is held stationary when the cutting tool is not in
contact or acting upon the heel of the boot or shoe or rather while the jack frame
is being reversed.
Thus while one boot or shoe heel is being automatically operated upon the one
trimmed can be taken off the jack or holder, and replaced by another, and so on in
succession.
Dated this 11th day of January 1892
WILLIAM BESTWICK MAXFIELD,
Patent Agent,
Leicester, England, Applicant's Agent.
...

page_text: COMPLETE SPECIFICATION.
Improvements in Boot and Shoe Heel Trimming Machines.
I. ALFRED BURKE FOWLER Engineer and General Manager of the
Rockingham Machine Company of Exeter, County of Rockingham, State of
New Hampshire, in the United States of America, 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 relates to improvements in boot or shoe heel trimming machines
to expediate the operation of paring, trimming and randing the heels of boots and
shoes automatically. And is carried out as follows, reference being had to the
accompanying drawings, in which—
Figure 1 represents a front elevation of the machine;
Figure 2 a side elevation and partial section of the same as seen from X in
Figure 1.
Figure 3 represents a plan view of the machine;
Figure 4 a horizontal section on the line Y Y shown in Figure 2.
Figure 5 represents a section on the line V. V. Figure 2;
Figure 6 a section on the line W. W shown in Figure 2.
Figure 7 represents a detail rear view of the upper part of the machine;
Figure 8. represents a vertical section on the line U. U. shown in Figure 7.
Figure 9 represents a detail sectional view of the shoe clamp.
Figure 10 a detail sectional view of the heel and heel template.
Figure 11 represents an end elevation of said heel and template;
Figure 12 a detail bottom view of the stop mechanisms for automatically stopping
and holding the shoe holder; and
Figure 13 represents a detail side elevation of the automatic locking and
unlocking mechanism for the jack.
Similar letters refer to similar parts wherever they occur on the different parts
of the drawings.
A. A', is the frame or base parts of the machine preferably secured at a proper
distance apart in their upper ends by means of a horizontal brace A, and having
their lower ends suitably secured to a base plate A³. To said base plate is secured
a step or bearing A, in which is journaled the vertical drive shaft a which has its
upper end journaled preferably in a bearing in the brace A", or other stationary
part of the machine. The shaft a is set in a quick rotary motion by means of belt
power applied to its pulley ; the said shaft a passes upwardly through the
blower a, having a suction pipe a³ terminating in its upper end as a hood a; a³ is
the delivery pipe from the blower a", as usual; a is the fan secured to the shaft a
within the blower a" as is common in air forcing apparatus. a' is a vertical post or
standard secured in a suitable manner to the suction pipe a³, or other stationary
part of the machine; a is a secondary or intermediate shaft which is universally
jointed at a to the blower shaft a. The upper end of the shaft as is journaled in a
bearing which is pivoted at to a longitudinally adjustable spindle or rod 611
adapted to slide in a bearing in the standard a', as shown in Figure 8; b is a
spring on the spindle &" for the purpose of automatically holding the trimming
tool with a yielding pressure against the heel of the boot or shoe during the
trimming operation; the upper end of the shaft a³ is universally jointed at 6 to
the cutter carrying shaft, the upper end of which is journaled in a bearing c',
having side trunnions e", adapted to rock and slide forward and back in grooved
guides d, d, in a bracket d' secured to the standard a as shown in Figures 1, 2, 3
and 8. To the bearing e' is pivoted a rod or spindle adapted to slide longitudinally
in sleeve which latter is pivoted at to the bracket d' c is a spring interposed
between the forward end of the sleeve and the bearing for the purpose of
automatically holding the cutter or trimmer tool with a yielding pressure against

page_text: the contour of the heel to be trimmed. On the shafte is splined and longitudinally
adjustable the trimmer tool e preferably provided with a rand or welt cutting
edge ee is a rand guide which is preferably made in the form of a non-rotary
projection journaled on the hub of the cutter e or on the cutter shaft, which rand
guide is adapted to enter the rand groove on the shoe, and is longitudinally
adjustable with the cutter, so as to prevent the shoe upper from being cut or
damaged, by contact with the latter. The said rand guide may to equal advantage
be made in the form of a loosely rotating disc journaled on the cutter or its shaft,
if so desired. The said rand guide is pivoted at e³ to a rod or spindle e longi-
tudinally adjustable in a sleeve e, preferably made externally screw threaded, and
made adjustable within an internally screw threaded sleeve e which is hung or
pivoted at e' to the standard a' as shown in Figs. 2 and 7. e is a spring interposed
between the forward end of the adjustable sleeve and the enlarged or shouldered
end of the spindle e for the purpose of causing the cutter tool to conform
automatically to the contour of the heel that is being trimmed.
By means of the sleeve e the tension on the spring e8 may be adjusted according
to the pressure desired on the cutter against the heel.
Above the cutter e is loosely journaled on its hub or shaft, a circular disc or
idler e which is automatically brought to bear against a top lift template to be
more fully described.
The springs e, e8 and 63 or one or more, serve the purpose of holding said idler e
against said top lift template by which arrangement the rotary cutter is held with
a proper pressure against the heel during the operation of trimming the same.
The pressure is regulated automatically by the aid of a double grooved cam eo on
the side shaft el carried in bearings and having on the inner end the bevel
wheele gearing with another wheel e on the under side of the worm wheel F. by
which means the grooved cam is rotated to move alternately the vertical levers els
and in the lower ends of which are pins or rollers riding in the cam grooves and
passing through the coupling link e¹. The lever e¹ is adjustably pivoted at 13* in
the slotted bracket e18 and carried to the spindle e its forked end riding in groove in
boss of same, the other lever e¹ is carried and adjustably pivoted at 13** in the
slotted bracket e, secured to the standard a', its upper forked end e20 fitting in
groove in the boss of the spindle 3, see Figure 7, so that pressure is exerted upon
the upper portion of the cutter shaft. The cutter shaft and its intermediate shaft
are automatically withdrawn so as to release the cutter from contact with the heel
at the completion of the operation of trimming the heel, and to hold it in such a
released position until a new heel is swung into position ready to be trimmed, which
is accomplished by a continuously rotating cam f. acting on a lever f¹ pivoted
at, and having a link f³ connected to it and to the lower end of a vibratory
lever c, centrally pivoted to the standard a', and adapted to be brought in contact
respectively with adjustable projections and c', on the respective spindles 6", and c³,
as shown in Figures 2, 4, 5 and 8.
G is the jack frame secured to the upper end of an intermittently rotating
shalt G journaled in bearings in the frame of the machine; the jack frame is
intermittently rotated by means of spur gear G", secured to the shaft G¹, and
intermediate connecting mechanism from the driving pulley H, as will be herein-
after be more fully shown and described.
To said gear is secured a disc G having two diametrically opposite locking
recesses G adapted to receive a locking pin G actuated by a cam on the
continuously rotated shaft F", and a spring G acting on a collar G' secured to the
rod G for the purpose of holding the jack frame stationary while a heel is being
trimmed, and automatically releasing it when finished.
On the jack frame spindle G is loosely journaled a sleeve I provided with a
worm wheel I meshing in the teeth, of a worm I", loose on a worm shaft 1³, which
latter is continuously rotated from the driving pulley H and the pulley H by the
medium of a belt H" leading from the latter to a pulley I secured to the worm
shaft I.

page_text: The driving pulley H is preferably loosely journaled on the driving shaft h and
the pulley His made fast thereon; is a friction clutch splined on the shaft h
and normally connected to the pulley H by the influence of a spring " during the
operation of the machine. If it is desired to stop the machine, a treadle lever ³
is depressed and locked beneath a projection A on the base A³, which treadle
lever is attached to a shaft journaled in stationary bearings on the frame of
the machine, said shaft having secured to it, a lever jointed at its upper end
to a collar on the clutch as shown in Figure 1. When the treadle lever is
released from the projection A, the clutch is forced in contact with the
interior of the driving pulley H. by the influence of the spring above mentioned.
We do not wish to confine ourselves to any particular device for starting and
stopping the machine, as this may be accomplished by any of the well known
treadle and clutch mechanisms without departing from the essence of our
invention.
To the sleeve I is attached a spur gear i, the teeth of which mesh into the teeth
of the intermediate gears k, k, loosely journaled on spindles, &, secured to the
underside of the jack frame G as shown in Figures 2 and 4. Each loose gear k
meshes into the teeth of another loose gear journaled on a pin l, also secured to
the underside of the said jack frame, and each gear 7 meshes into the teeth of an
irregular gear m loosely journaled one on each of the shoe holder shafts M, M, as
shown in Figures 2 and 4. Each of the shoe holder shafts M is journaled in a
bearing M, which is radially adjustable in a slot in the jack frame G for the
purpose of properly presenting the heel to the action of the cutter with a minimum
movement of the cutter shaft. Such radial adjustment of the shoe holder shaft is
automatically accomplished by means of a grooved cam L secured to the inter-
mediate gear, which cam has a groove L' adapted to receive a pin or pin and
roll M connected in a suitable manner to the bearing M' as shown in Figures 2
and 4. To each of the radially adjustable bearings M is attached a horizontal
pin M3 adapted to slide in a bearing in the jack frame G. for the purpose of steadying
the said bearings M', M', as they are moved radially relative to the jack frame, as
shown in Figures 2 and 3.
The object of the irregular gears m, m, on the shoe holder shafts M, M, is to
cause an oscillating motion to be imparted to the shoe holder shafts with freedom
of radial adjustment relative to the jack frame for the purpose of properly presenting
the heel to the action of the cutter.
Upon the lower end of each shoe holder shaft M. is splined and longitudinally
adjustable thereon a clutch m' adapted to interlock with a corresponding clutch m",
on the underside of the irregular loose gears m, m.
To each of said clutches m¹ is
pivotally connected a lever m³, which is hung on the pin and normally actuated
by a spring preferably arranged on the pin k', for the purpose of holding the
clutch m' locked to the irregular gear m as shown at the left side of Figure 2 and
thereby causing the shoe opposite to the trimmer tool to be turned from breast to
breast of the heel during the trimming operation. The other clutch is automatically
disengaged from its gear m by its lever m³ coming in contact with and resting on a
stationary cam projection A secured to the frame A or other stationary part of
the machine as shown in the right side of Figure 2 to allow of the removal of the
trimmed shoe and its replacement by another. N is the shoe holder having its
lower portion secured in a suitable manner to the shoe holder shaft M; N is the
jack spindle, one for each of the shoe holders, which spindle is preferably screw
threaded in its lower end, and adjustably secured to the lower hub of the shoe
holder, so as to cause said jack spindle to be longitudinally adjustable relative
to the trimmer tool, so as to bring the rand groove on a shoe in a position
corresponding to that of the rand guide on the cutter.
During the operation of the machine, the shoe is supported upside down ou
the jack spindle N', and clamped in position by means of a pressure screw
spindle N journaled in a bearing in the upper part of the shoe holder N, and
adapted to be turned by means of a handle or hand wheel N³ secured to its

page_text: upper end as shown in detail in Figure 9; N1 is a vertically adjustable internally
screw threaded sleeve in which the pressure screw N works; said sleeve N' is
prevented from turning around its axis during its up and down movement, and
it has in its lower end preferably a dove tailed groove N, adapted to receive
a correspondingly shaped dove tailed projection E on the top of the heel tem-
plate as shown in Figure 11. E is a stop projection on top of the heel
template E adapted to be brought in contact with the side of the sleeve N
when the template is brought in its proper position relatively to said sleeve;
and E, E, is a ledge or stops on the underside of the template E against
which the breast of the boot or shoe heel is held during the trimming operation
as shown in Figures 10 and 11. Each shoe holder bearing M' has at its outer
end a stop projection M against which the lower part of the shoe holder is
brought to bear when said shoe holder is swung into its proper position for
presenting the heel to the action of the cutter; the said projection thus serving
as a stop to limit the rotary motion of the shoe holder, as well as means for holding
the shoe holder shaft clutch m' in a proper position so that it may be engaged with
the clutch on the irregular gear m shortly after the spring pressed clutch lever m³
is released from the stationary cam or projection A
In the operation of the machine, the jack frame G is rotated while the sleeve I
and its gear I', i are held stationary and vice versa, as will be hereinafter more
fully described. The mechanism for intermittently rotating the jack frame G is
constructed as follows: On the continuously rotating worm shaft 13 is loosely
journaled a bevel gear ', having a clutch g" adapted to be engaged with a sliding
clutch splined on the shaft 13 as shown in Figures 1, 3, 4, 5, 6 and 12; the
teeth of the bevel gear gl mesh in the teeth of a bevel gear secured at the upper
end of the shaft journaled in a stationary bearing and having secured to its
lower end a pinion which is geared to the gear G on the jack frame spindle G
by means of an intermediate gear y shown in Fig. 1 and in dotted line in Figures 3
and 4.
It will thus be seen that a rotary motion is imparted to the jack frame from the
worm shaft 13 by locking the clutches K and g together, and when the clutch K
is disconnected from the clutch g the jack frame remains stationary. The
worm meshing in the teeth of the worm wheel is also loose on the worm
shaft 13, and said worm has in one of its ends a clutch adapted to engage with
the sliding clutch K on the shaft l'as shown in Figures 5, 6 and 12. The worm ["
serves for the purpose of intermittently oscillating the shoe holders from breast to
breast of the heel of the boot or shoe, which is accomplished by the sleeve I, and
its gear i meshing by means of the intermediate gears k, l, in the teeth of the
irregular gears m, m, on the shoe holder shafts M, M. To the end of the worm
shaft is secured a worm ³ meshing in the teeth of the worm wheel F, which is
secured to a shaft F" journaled in stationary bearings on the frame of the
machine.
The said worm wheel F has on its top an outer cam f; for withdrawing the cutter
from the heel and on its shaft F" a cam F³ for actuating the locking pin G³ by
which the disc G³, and its gear G are held stationary during a portion of the
rotation of said gear F, as herein above described. In addition to the cam, the
gear has also arranged on its top an inner cam f for automatically shipping
the clutch for engagement with the respective clutches 7" and ", there being
for this purpose arranged a shipper bar O adapted to slide in stationary bearings O
and O, and having secured to it an arm or projection ()³ adapted to enter an
annular groove K in the longitudinally movable clutch K. The shipper rod O is
moved in one direction by means of the cam acting on a pin or projection O' on
the said shipper rod, and in the opposite direction preferably by means of a spring O
located on the rod O between a collar Oon said
as shown in Figures 1, 3, 4, 5 and 12. On the
arranged a face cam F which actuates a lever
stationary bearing on the machine frame, such
rod and the stationary bearing O',
underside of the worm wheel Fis
attached to a shaft i" located in a
shaft having also attached to it, a

page_text: slotted lever through the slot of which passes a pin or projection * attached to
the clutch as shown in Figure 12; the levers 7 and are actuated in one
direction by the said cam F1 and the opposite direction by a spring on the
shaft. The object of this device is for the purpose of holding the clutch and
its worm stationary while cutter is not acting upon the heel of the boot or shoe.
The operation of the machine is as follows: After the boot or shoe has been
properly secured to the shoe holder and the machine set in motion, the jack frame
rotates half a revolution carrying the shoe to the cutter after which the said jack
frame is temporarily locked in position. The cutter is automatically brought in
contact with the heel and automatically adjusted thereto; the shoe holder turning
mechanism is then automatically set in motion causing the heel of the shoe to be
turned from breast to breast in contact with the cutter; while this takes place
an untrimmed heel and its shoe is being adjusted and secured to the opposite shoe
holder.
After the heel has been trimined, the shoe holder turning mechanism is auto-
matically stopped and locked, the cutter is automatically withdrawn from contact
with the heel, the jack frame is automatically released and swung half a revolution
around its axis bringing the finished heel in front of the operator and the untrimmed
heel brought into position to be acted upon by the cutter and so on.
Having now particularly described and ascertained the, nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In a boot or shoe heel trimming machine, the combination with a boot or shoe
holder, of a vertical rotary drive shaft, a secondary shaft universally jointed to the
drive shaft and rising vertically therefrom a rotary trimmer connected with and
rotated by the secondary shaft, a pivoted vibratory lever having a spring yielding
connection with the secondary shaft, a horizontally rotating cam, and a horizontally
swinging lever acted on by the cam and having a link connection with the vibratory
lever for automatically vibrating the latter at intervals to swing the secondary
shaft and thereby withdraw the rotary trimmer from contact with the boot or shoe,
substantially as described.
2. The combination with a boot or shoe bolder, of a rotary drive shaft, a
secondary shaft universally jointed to the drive shaft, a cutter shaft universally
jointed to the secondary shaft and provided with a longitudinally sliding cutter
splined thereon, vibratory levers having independent spring connections with.the
secondary shaft and means for automatically vibrating the levers at intervals to
automatically swing the secondary shaft and the cutter carrying shaft for with-
drawing the rotary cutter from contact with the boot or shoe, substantially as
described.
3. The combination with a boot or shoe holder, of a rotary drive shaft, a
secondary shaft universally jointed to the drive shaft, a cutter shaft jointed to
the secondary shaft and provided with a trimming cutter rotating therewith,
vibratory levers having independent spring yielding connections with the secondary
shaft and the cutter shaft, a rotating cam and a lever operated by the cam and
connected with the vibratory levers for operating them to automatically swing
the secondary shaft and the cutter shaft and thereby withdraw the rotary cutter
from and automatically regulate the pressure of the cutter on the boot or shoe,
substantially as described.
4. The combination with an intermittently rotating jack frame having a series
of oscillatory boot or shoe holders, of a rotary drive shaft, a secondary shaft
universally jointed to the drive shaft, a rotary trimming knife connected with
and rotated by the secondary shaft, a vibratory lever having spring yielding
connections with the secondary shaft, a rotary cam and a swinging lever acted on
by the cam and having a link connection with the vibrating lever for automatically
vibrating the latter at intervals to swing the secondary shaft and thereby with-

page_text: '
. draw the rotary cutter from contact with and the means for automatically
regulating the pressure of the cutter on the boot or shoe, substantially as
described.
5. The combination with an intermittently rotating jack frame, radially movable
bearings thereon, oscillating shoe holder shafts carrying shoe holders and sup-
ported by the radially movable bearings, and means for radially adjusting the
bearings and oscillating the shoe holder shaft, of an upright drive shaft, a
secondary shaft forming a continuation of the drive shaft and universally jointed
thereto, a rotary trimming cutter connected with and rotated by the secondary
shaft, a vibratory lever having spring yielding connections with the secondary
shaft, a horizontally rotating cam and a horizontally swinging lever having a link
connection with the vibrating lever for automatically vibrating the latter at
intervals to automatically swing the secondary shaft and thereby withdraw the
rotary cutters from contact with and the means for automatically regulating the
pressure of the cutter on the boots and shoes, substantially as described.
6. The combination with a rotary drive shaft, a secondary shaft universally
jointed to the drive shaft, a rotary trimming cutter connected with and rotated
by the secondary shaft, and means for automatically swinging the secondary shaft
to move the rotary cutter into and out of contact with a boot or shoe, of an
intermittently rotating jack frame, radially movable bearings on the jack frame,
oscillatory shoe holder shafts provided with irregular gears, cams engaging the
movable bearings and provided with gears meshing into the irregular gears, and
means for transmitting rotary motion to the gears of the cams, substantially as
described.
7. The combination with a longitudinally and laterally yielding rotary trimmer,
of a jack spindle G' provided with a sleeve I having a gear i, means for rotating
the sleeve on the jack spindle, a jack frame G secured to the jack spindle and
provided with radially movable bearings M', oscillating shoe holder shafts M,
journaled in the bearings and provided with irregular gears m, cams L engaging
the bearings and provided with gears l, and gears k transmitting motion from the
sleeve on the jack spindle to the gears of the cams, substantially as described.
8. The combination with a longitudinally and laterally yielding trimmer, of a
jack spindle, a sleeve mounted on the jack spindle, a jack frame secured to the jack
spindle and provided with radially movable bearings, oscillatory shoe holder shafts
carried by the bearings and provided with irregular gears, independent cams each
provided with a gear meshing into one of the irregular gears and operated
by a gear connection with and meaus for turning the spindle, substantially as
described.
9. The combination with a longitudinally and laterally yielding trimmer, of a
jack spindle, a sleeve journaled on the spindle and provided with a gear, a jack
frame secured to the spindle and provided with a series of radially movable
bearings, oscillatory shoe holder shafts carried by the bearings and provided with
irregular gears, independent cams mounted on the jack frame and each provided
with a gear meshing into one of the irregular gears, gears transmitting motion
from the sleeve on the jack spindle to the gears on the cams, and worm mechanism
for turning the sleeve on the jack spindle, substantially as described.
10. The combination with a yielding heel trimmer, of a jack spindle, a jack
frame secured to the spindle and provided with radially movable bearings,
oscillatory shoe holder shaft carried by the bearings and provided with irregular
gears, independent cams mounted on the jack frame and each provided with a
gear, a sleeve mounted on the jack spindle and geared to the gears of the cams,
a clutch acting in connection with each irregular gear, clutch levers for moving
the clutches into and out of engagement with the irregular gears, and a cam for
operating the clutch levers, substantially as described.
11. The combination with a boot or shoe support, of a heel clamping sleeve, and
a heel template having a sliding engagement with the sleeve and provided on its

page_text: upper side with an attached stop projection to bear against the sleeve and on its
lower side with a stop projection to bear against the heel breast, and lip or stop to
keep the cutter from dropping too low, substantially as described.
12. The combination with a boot or shoe jack of an upright drive shaft and
constituting a vertical continuation thereof, a secondary shaft universally jointed to
the drive shaft, a cutter shaft jointed to the secondary shaft, a trimmer splined on
the cutter shaft to move longitudinally therealong but rotating therewith, lever
mechanism for swinging the secondary shaft and cutter shaft laterally, and a
horizontally rotating cam or cams for automatically operating the lever mechanism,
substantially as herein before described and set forth.
Dated this 12th day of November 1892.
WILLIAM BESTWICK MAXFIELD,
"The Central" Office for Patents, &c.,
19, Bowling Green Street, Leicester, England, Applicant's Agent.