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Патент USA US2057747

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'
0a. 20, 1936.
W_1_._ SHAW
2,057,747
I CONCAVINQ MACBINE
Filed July 23, 1930
3 Sheets-Sheet l
Oct;
w‘ J, SHAW
2,05 7,747
CONCAVING MACHINE
Filed July 23, 1950
66
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3 Sheets-Sheet 2
Oct. 20, 1936.
w_ J_ SHAW
I 2,057,747
CONCAVING MACHINE
Filed July 23, 1930
3 Sheets-Sheet 3‘
2,057,747
Patented Get. 20, 1936
warren srArEs
PATENT OFFICE
72,057,747
CONCAVING MACHINE
vWesley John Shaw, Haverhill, Mass.,rassignor,"by
mesne assignments, to United Shoe ‘Machinery
Corporation, :Paterson, N. vJ., -a-:corporation ‘of
New Jersey
Application July 23, 1930, 'Serial'No. $470,034
11 Claims.
(CI. 12-46)
The present invention, though having also fea
turesof more general application, is more par
ticularly related to machines for concaving wood
heellblocks.
ner illustrated vin Figs. vl and‘2. The machine is
then set'into operation. One corner‘52 (see more
particularly ‘Figs. 5 and 7) of the breast end a.
of the ‘attaching ‘face of the heel is adapted to
There is already on the market a heel-con
engage against a guide :56, positioned a'very small
caving machine provided with a jack that holds
the heel block, and that is actuated continuously,
relatively to a rotary concaving cutter, along a
curved, path corresponding to the edge contour
distance (away vfrom the active cutting edge of
a rotary concaving cutter I 0, corresponding to
the width of ‘the rib 31 left along the edge-con
10 of the attaching face, from one side of the breast
The heel is then‘moved about the rotary con
caving cutter 10 in ‘a curved path corresponding
to the edge contour ‘50 ‘of the attaching face 4
of the 'heel. The ‘heel is shown in Figs. 5 ‘and 7
of the heel to the opposite side of the breast of
the heel. During this actuation of the heel along
the curved path, the rotary concaving cutter cuts
away successive portions of the attaching face.
15 The cutting commences near the edge contour of
the attaching face, at one side of the breast and
continues, without interruption, along the at
taching face edge contour, to the opposite side
of the breast. The attaching face thus becomes
20 concaved in a single, continuous operation. Two
concave grooves are thus formed by the cutter
in the attaching face, one along each side of the
heel, the grooves being separated by a perceptible,
central rib. This central rib is sometimes ob
2 01
jectionableyand requires another operation to
effect its removal.
It is, accordingly, an object of the present in
vention to provide a new and improved concav
ing machine of the above-described character
30 that shall eliminate the said rib. Other objects
will be explained hereinafter and will be par
ticularly pointed out in the appended claims.
The invention will now be explained in con
nection with the accompanying drawings, in
35 which‘Fig. 1 is a perspective of a machine con
just after it has left its initial position. With
its edge contour <50 always in engagement with 15
the'guide‘ii?the heel is then actuated inthe di
rection of "the‘arrow ~53 of ‘Fig. 5, through the
successive'positions'indicated‘in Figs. 8,9 and 10.
During this-movement of the heel, the rotary
ooncaving cutter l0, situated adjacent to the path 0
of ‘movement of the edge contour of the attaching
face 4 of the 'heel 2, outs away successive por
tions of ‘the attaching ‘face '4, as illustrated more
particularly in the'said‘Figs. '7'to 10, to form the
concave groove -6. The cutting of the concave
groove “'6 by the cutter ‘I0 commences at ‘the
corner "52 'of the :breast end a of the attaching
face of the heel, and continues without interrup
tionyalong the edge contour 50 of the heel, to
the opposite "corner 54. During the advance of 0
the heel 'from'the initial position (not shown) to
the position‘ of Figs. 5_and 7, the cutter II! has
cut‘away'the ‘attaching face portion 4 of the heel
along the ‘boundary 11,17, ‘0, :d. In the position of
Fig. 8,‘the wall c has advanced to e, and in the
structed according 'to a preferred embodiment of
position of Fig. 9, to f. During the movement of
the present invention, parts being omitted and
lines 3—3 of Fig. 2, 4—4 of Fig. 3, 5—5 of Fig. 2
and 6-6 of Fig. 5, looking in the directions of
the heel over the support or table 8, the cutter
l0 follows ‘the line ‘b substantially parallel to the
contour ‘50, ?rst along one side of the heel, from
the corner 52, then along the back of ‘the heel, as
and ?nally 2along the other side of the heel, to
the opposite corner 54.
the arrows, Figs. 5 and 6 being drawn upon 'a
larger scale; Fig. '7 is a view showing the heel in
anism with a pattern or cam l2 (Fig. 1), having
othervparts‘broken away for clearness; Fig. 2 is
a fragmentary elevation of the same; Figs. 3., 4, 5
40 and 6 are sections taken, respectively, upon the
45 the position indicated in dotted lines in Fig. 5,
alsojupon a. larger scale; and Figs. .8, 9 and
10 are similar views showing further steps in the
operation.
.
The machine of the present invention is in
tended to cut away the attaching face portion 4
(Fig. 2) ,of a wood-heel block 2 so as to produce
a concaving cut 6 (Fig. 6). The heel is ?rst
placed, with the attaching face portion 4 down
5
tour-50'of the 'attachingface 4 (seealso Fig. 6).
ward. upon a bed 8, and is clamped in position
by jaws I28 of a heel-holding jack in the man
The heel-holding 'jack is connected .by mech
an edge contour corresponding substantially to
the edge "contour of the attaching face portion 4
of the ‘heel 2. The heel 2 is held by the heel
holding jack in such position, as illustrated in
Fig. 1, that its contour 50 will be more or less
parallel to the-contour of the pattern or cam l2.
The pattern or ‘cam 12 is provided with gear
teeth 24 "meshing with the teeth of a pinion ‘26
that is mounted on a spindle 28 provided with a
pulley 30 ‘that may be driven from any desired
55
source of 'power.
2
2,057,747
Power is thustransmitted to the pinion 26, the
rotation of which results in a corresponding
movement of the pattern or cam I2. During
such movement, an idler roll 38, mounted upon
a shaft 49, and spring-pressed against the inner
face of the pattern or cam I2 by a spring 44,
forces the upper smooth or untoothed portion 45
of the outer face of the pattern or cam'I2 against
an idler‘ guide roll 46, as well as against'the
10 upper untoothed or roll part of the gear 26, caus
through its motions, it will be noted that it
crosses the heel center line I33 at I35, Fig. 8,
and then continues on the other side of this
center line I33, as shown at I31, Figs. 9 and 10.
Theoretically, a rib might be formed at the
intersection of the two curves produced when the
axis I29 traverses the respective paths I3I and
I31. According to the present invention, the
formation of the rib is prevented by suitable
shaping of the cutter blades. This is rendered 10
ing the edge contour 'of the pattern to follow‘fl ‘possible, according to the preferred embodiment
the guide 46 during the actuation of thepattern , of the present invention, by the fact that, as be
or cam I2.
The idler roll 46, therefore, in con
fore described, the blades extend at least part
junction with the pinion "26f and’ the ‘spring-y. way across the thickness of the. shaft 99 a dis
15 pressed roll 38, determines the ‘path; of mpve;
tance greater than the width of the attaching
ment of the pattern or cam I 2 and, therefore,
of the heel held below the cam I2 by the heel
holding jack. This path of movement'is-such as
to cause the heel to assume the successive posi-H
20 tions illustrated in Figs. 7 to 10. The'pattern'
or cam I2 slides during such movement in a
face. As before stated, theillustrated blades ex
tend, not merely part way, but all the way, across
‘the thickness of the shaft 99, from the center'or
axis I29 of the shaft 99 to and beyond the outside
surface thereof.
20
vTheoretically, the cutter blades may be shaped
housing formed in a hollowed-out section of a in-the form of a continuous curve,‘ but it might
bracket or arm 5I.
2.5,
The upper and lower walls
of the housing constitute guide plates between
which the cam I2 moves. It has been found
that a single cam I2 may be used with a wide
variety of. attaching face contours’ 59 and, in
so
deed, with all attaching facev contours that are
met with in actual practice. This result is
brought about by providing for a lost-motion
connection between the-cam I2 (and the: heel
holding jack carried thereby). and the guide. 56.
~
.35
The cutter I9 is mounted upon a ball-bearing
spindle or shaft 99, providedwith a pulley 9|,
over which passes a belt 93 that is driven from
any desired source of power. The shaft 99 is
perpendicular to the plane of movement of; the
heel. 'The heel-holding jack isv carried vby the
pattern or cam I2, so as to move therewith, and
40 may be so adjusted that the edge, contour 59
of a properly shaped heel, held by the heels
holding jack, shall be brought into. contact with
the guide 56; or, statedv more accurately, so that
the edge contour 59 shall, during themovement
of the heel, be spaced a constant distance, equal
' to'the thickness of the rib 3|, from the point
where the cutter I9- commences to cut into the
attaching face 4.
59
.
. 1
,
~
_v
s
I
‘
. vAn important feature of the present invention
resides in the use of a cutter-I9 that shall not
leave any rib in the concaved attaching face.
According to the preferred embodiment of the
invention that is hereinillustrated'and described,
the cutter I9»is mounted upon the extreme .end
55 of the shaft 99, and has one or, more blades, as
‘ shown, thatextend at least part way across the
so
thickness of the shaft 99. The illustrated blades
extend all the way across the thickness ,of v‘the
shaft 99, from the centeror axis I29 (Fig. 5) of
the shaft to and beyond the outside. surface
thereof. As a result of this. construction, each
cutter blade, during a single revolution, [sweeps
out over an area extending between the-bounda
then become necessary to use a different-size
blade for each different-size attaching face. A
single-shape blade may be used for all heels met 25
with in practice by ?attening the blade slightly,
in the neighborhood of the axis I29, as shown
more particularly at I4I, Fig. 3. A blade so
?attened will obviously produce a flat area for a
small region on each side of the center. ‘This 30
region is bounded by the lines I43 and I45, Figs.
6 and '7, on each side of the line I3I , and the line
I45 lies beyond the center line I33 of the heel
(Fig. 7), producing, ultimately, a single ?attened
region, symmetrically disposed with respect to the
heel-center line I33. 'I'heultimate shape of the
attaching face is diagrammatically indicated in
Fig. 10, the flattened portion being included
within the dotted line I43, I41. This ?attening
is of no consequence for practical purposes.
The
important consideration is that the central rib
has been eliminated, so that the curves of the cuts
produced along the two sides of the heel merge
smoothly into the ?attened portion.
7
. In some cases, it is desirable to use a cutter of
somewhat different size or shape. To this end,
the cutter shaft 99 is provided with a terminally
threaded, reduced portion 92. A shoulder I98
separates the reduced portion 92 from the main
portion of the shaft 99. A cutter-blade-carrying 50
collar 94 is threaded upon the reduced portion
92 and is held ‘against the shoulder I98. To sub
stitute one cutter for another, all that is neces
sary is to unscrew one blade-carrying collar 94
and to replace it by another. The table 8 is
provided with a removable portion I48 to permit
such replacement.
The cutter I9 is shown in Fig. 3 extending
through an opening 2'98 in the table 8. It is de
sirable to adjustthe vertical position of the cut
ter I9 in theopening _298. This may be effected
by longitudinally adjusting the shaft 99. To
ries b and def Fig. ,7, ‘for example. _In Fig. 7,
this end, .the shaft 99 is mounted in ball bearings
65. thepath traced by the. center or ‘axis I29 of the
adjustable plate support I53. To facilitate the
vertical adjustment of the support I53, and the
better to hold it in adjusted position, one side of
the support I53 is provided with a beveled gib
I55, Fig. 4, that is mounted in a correspondingly
cutter shaft 99, as they heel ismoved thereover,
is indicated by the-line. I3I.‘. Thelongitudinal
center line of the heel is indicated a'tQI33. “ It :Will'
be noted that the areatraced by thecutter, be
tween the boundaries b and d, is greaterthan
‘half the width of the attaching facef'thus ,ex
tending across the longitudinal center .line I33'of
the'heel.
,1
,
"
_.
,7
.
..
, Following out the path I3I traced by'the. axis
7.91
I29 of the cutter shaft 99, as the'fheel is ‘put
I49 and I5I, mounted as a unit upon a vertically
beveled vertical guide groove I51 on vthe main
frame. The vertical adjustment may be effected
by a hand wheel I59, Fig. 2, secured to a threaded
stem I6I, that is threaded into the plate support
I53 atI63 and that is held against vertical move
ment by collars I65.on the stem I6I disposed on 7.5.
'aowgmz
each sidecf ai-lug li?‘lprojecting:from'theiframe
of
the
machine.
‘
v
'
i
'
‘
,
"
Modi?cations will occur :to "persons skilled in
the art,,and all such are considered to fall within
the spirit-andscope of the present invention, as
3
ing transversely to the shaft a distance greater
than half the width of the attaching face ‘of the
heel, and the cutter having a flattened'portion in
theneighborhoodof the axis of the shaft.
‘ '5.’ A machine for concaving heels‘having, ‘in
combination, 'a concaving cutter, means for hold
de?ned in the appended claims-‘ -
ing a heel, means forlactuating the'holdingmeans
What is ,claimed is :'
1. A machine for concaving heels having, in
combination, a rotary shaft, a concaving cutter
10 mounted on the shaft, means for holding a heel,
means for rotating the shaft, and means for actu
ating the holding means about the cutter in a
plane, curved path corresponding at least in part
to the edge contour of theattaching face of the
15 heel to cause the cutter to produce a concaving
cut in the attaching face of the heel along the
edge contour of the attaching face of the heel
from one side of its breast end to the other, the
plane of the curved path being substantially per
pendicular to the shaft, and the cutter having a
about the cutter in a curved path corresponding
at least in part to the edge contour of the attach
ing face of the heel to cause the cutter to produce 10
a concaving cut in the attaching face of the heel
along its edge contour from one side of its breast
end to the other, and means whereby the curves
of the cuts produced along the two sides of the
15
heel are caused to merge smoothly.
corresponding at least in part substantially to the
edge contour of the attaching face of a heel,
6. A machine for concaving heels having, in
combination, a rotary shaft having a terminal
threaded portion, a collar threaded thereon, a
concaving cutter mounted on the collar, means
for holding a heel, means for rotating the shaft, 20
and means for actuating the holding means about
the cutter in a plane, curved path correspond
ing at least in part to the edge contour of the
attaching face of the heel to cause the cutter to
produce a concaving cut in the attaching face of
the heel along its edge contour from one side of
its breast end to the other, the cutter having a
means for actuating the pattern, a guide, means
cutting edge extending transversely to the shaft
for causing the edge contour of the pattern to
follow the guide during the actuation of the pat
a distance greater than half the width of the
attaching face of the heel.
7. A machine for concaving heels having, in
combination, a rotary shaft, an anti-friction
bearing for the shaft, means for rotating the
shaft in the bearing, a concaving cutter mounted
on the shaft, means for holding a heel, and
means for actuating the holding means about the
cutter in a plane, curved path corresponding at
least in part to the edge contour of the attaching
face of the heel to cause the cutter to produce a
concaving cut in the attaching face of the heel
along its edge contour from one side of its breast
end to the other.
8. A machine for concaving heels having, in
combination, a rotary shaft, a concaving cutter
mounted on the shaft, means for adjusting the
shaft longitudinally, means for holding a heel
cutting edge that, during the cutting operation,
cuts into the attaching face through a width
greater than half the width of the attaching face.
2. A machine for concaving heels having, in
25 combination, a pattern having an edge contour
tern, means for causing the heel to be moved
with the pattern, a rotary shaft, means for ro
tating the shaft, and a concaving cutter mounted
on the shaft adjacent to the path of movement of
35 the edge contour of the attaching face of the heel,
the second-named means causing the attaching
face of the heel to be moved in a plane, curved
path corresponding to the edge contour of the at
taching face of the heel, whereby the cutter will
40 produce a concaving cut in the attaching face of
the heel along the edge contour of the attaching
face of the heel from one side of its breast end to
the other, the plane of the curved path being sub
stantially perpendicular to the shaft, and the
cutter having a cutting edge that, during the
cutting operation, cuts into the attaching face
through a width greater than half the width of
the attaching face.
'
30
35
40
45
means for rotating the shaft, and means for ac
tuating the holding means about the cutter in a
3. A machine for concaving heels having, in
combination, a concaving cutter, means for hold
ing a heel, and means for actuating the holding
plane, curved path corresponding at least in part
to the edge contour of the attaching face of the 50
means about the cutter in a curved path corre
cut in the attaching face of the heel along its
heel to cause the cutter to produce a concaving
sponding at least in part to the edge contour of
edge contour from one side of its breast end to
the attaching face of the heel to cause the cut
ter to produce a concaving cut in the attaching
the other.
9. A machine for concaving heels having, in
combination, a plane support having a portion
provided with an opening, a rotary shaft per
pendicular to said plane, means for rotating the
face of the heel along the edge contour thereof
from one side of its breast end to the other, the
cutter having a cutting edge that, during the cut
ting operation, cut into the attaching face
60 through a width greater than half the width of
the attaching face, and the cutter having an
inner ?attened portion.
4. A machine for concaving heels having, in
combination, a rotary shaft, a concaving cutter
65 mounted on the shaft, means for holding a heel,
means for rotating the shaft, and means for ac
tuating the holding means about the cutter in
a plane, curved path corresponding at least in
part to the edge contour of the attaching face of
70 the heel to cause the cutter to produce a con
caving cut in the attaching face of the heel along
the edge contour thereof from one side of its
breast end to the other, the plane of the curved
path being substantially perpendicular to the
75 shaft, the cutter having a cutting edge extend
shaft, a concaving cutter mounted on the shaft 60
and extending through the opening, means for
holding a heel, and means for actuating the
holding means about the cutter to move the heel
over the support in a curved path corresponding
at least in part to the edge contour of the attach 65
ing face of the heel to cause the cutter to produce
a concaving cut in the attaching face of the heel
along its edge contour from one side of its breast
end to the other.
10. A heel-concaving machine comprising, in 70
combination, cutting means including an end
mill. and means for feeding a heel to and over
the end-mill, said end-mill having a cutting-edge
rotating for cutting action from the rim toward
75
the middle of the concave of the heel.
4-
2,057,747
11. In a machine for concaving wood heels, in
combination, a cutter, means for holding a heel,
ing a straight portion and a curved portion cor
means for actuating one of said members so as
to cause the cutter to engage the heel along a
responding ‘to the cross sectional shape of the
edge “portionof the desired cavity to be produced,
path parallel to the edge contour of the heel
during which‘ the axis of the cutter is positioned
in a plane transverse to said edge contour, the
operative'portion of the pro?le of the cutter hav
said operative portion extending across more
than half the width of the heel.
vWESLEY J. SHAW.
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