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Патент USA US3086576

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April 23, 1963
E. E. JolNER ETAL
3,086,566
MACHINES FOR FORMING CORES 0F DOWELS USED
IN THE REINFORCING OF HEELS
Filed D80. 16, 1958
6 Sheets-Sheet 1
E‘an/r B. Perri
Peter R Per/‘í
By their' Attorney
Aprll 23, 1963
E. E. JolNER ETAL
MACHINES FOR FORMING CORES OF' DOWELS USED
Filed neo. 1e, 195e
3,086,566
IN THE REINFORCING OF HEELS '
6 Sheets-Sheet 2
April 23, 1963
E. E. JOINER ETAL
MACHINES FOR F ORMING CORES OF DOWELS USED
IN THE REINFORCING OF HEELS
Filed Dec. 16, 1958
j,
3,086,566
6 Sheets-Sheet 5
April 23, 1963
E, E, JOINER ETAL
MACHINES FOR FORMING CORES 0F DOWELS USED
IN THE REINFORCING OF HEELS
Filed Dec. 16, 1958
3,086,566
6 Sheets-Sheet 4
April 23, 1963
E.E..1o1NER ETAL
MACHINES FOR FORMING CORES OF DOWELS USED
IN THE REINFORCING OF HEELS
Filed Dec. 16, 1958
3,086,566
6 Sheets-Sheet 5
April 23, 1963
E. E. JolNr-:R ETAL
3,085,556
MACHINES FOR FORMING CORES OF DOWELS USED
IN THE REINF'ORCING OF HEELS
Filed DeC. 16, 1958
6 Sheets-Sheet 6
www
MN
huw
United States Patent()
1P
3,086,566
lCe
Patented Apr. 23, 1963
1
2
ing movement of the cutter toward the axis of rotation
of the >members and the spindles.
The cylindrical dowel core blanks are successively de
livered «from a hopper to radially disposed channels of a
turret ring which indexes the blanks to the trimming sta
tion where the diameters of their lengthwise median por
3,086,566
MACHINES FOR FORMBNG CORES 0F DOWELS
p USED 1N THE REINFORCING 0F HEELS
Edgar E. Joiner, Andover, andLFrank B. Perri, Groveland,
' Mass.,.and Peter R. Perri, Atkinson, N.H‘., assignors to
Fred W. Mears Heel Company, Inc., Lawrence, Mass.,
tions are reduced to provide dowel cores such as above
a corporation of Massachusetts
described, the dowel cores being automatically ejected
Filed Dec.< 16, 1958, Ser. No. 780,750
10' Claims. (Cl. 142-17)
from the channels of the turret ring as they are indexed
successively to an ejector station.
The present invention consists in the above and here
'
This invention relates to machines for use in themanu
facture of dowels ofthe general type disclosed inA United
States Letters Patent No. 2,816,374, granted December
inafter described novel features, reference being had to
the accompanying drawings which illustrate one embodi
17, 1957 on an application'iiled in the name of Edgar E.
Joiner, Ir.
»It has -been found desirable to strengthen the dowels
disclosed in said Patent No. 2,816,374 when such dowels
are to be used for reinforcing extremely high “pencil
ment of the invention selected for purposes of illustration,
15
said invention being fully described in the following de
scription and claims.
In the drawings,
FIG. l shows in perspective the illustrative machine
shank” heels, the strengthening being effected by making
for routing cylindrical core blanks used in the manufacture
theI cylindrical` cores of hickory instead- of birch and by 20 of heel reinforcing dowels;
slightly increasing the thickness of the steel jacket which is
FIG. 2 is a plan view, partly broken away, of the
wrapped around and pressed into'saidcores.
In` the manufacture of dowels disclosed inl said Patent
No. 2,816,374' the metal jacket is pressed substantially its
machine;
FIG. 3 shows a portion of the machine in front eleva
tion;
full thickness in to the peripheral face of the cylindrical 25
FIG. 4 shows a portion of the machine as viewed
birch core` of the dowel. It will be appreciated that when
generally along the line IV-IV of FIG. 3;
cylindrical hickory cores are employed in the manufacture
FIG. 5 is a section taken generally along the line
of dowels and the thickness of the steel jacket is greater
V-V of FIG. 4, showing sleeves for centralizing dowel
than that disclosed> in said patent, itis not feasible to
core blanks delivered to -a trimming station of the machine
press said jacket a distance equal to its full thickness 30 by a turret ring, and spindles for carrying said sleeves
into the core and accordingly it is desirable to reduce by
and for gripping said blanks as well as for rotating them
a routing cut the diameter of the lengthwise median por
as an end mill routing cutter is lowered against said
tion of a cylindrical core blank and thus provide a core
blanks;
having heads at its opposite ends spaced by a shank which
FIG. 6 is a perspective view showing details of the end
may be described as forming with said heads a peripheral 35 mill routing cutter used in the machine;
groove or slot into which is pressed the steel jacket, said
FIG. 7 is a section on the line VII-VII of FIG, 5,
jacket cooperating With the hickory core to provide the
present dowel which is substantially stronger than and
has all the advantages of the prior dowel.
gripping spindles;
wise median portion of the cylindrical hickory dowel core
of FIG. 4 showing mechanism for indexing the turret
showing details of mechanism for operating the core blank
"
FIG. 8 is an illustrative veiw showing the dowel core
With the foregoing considerations in view, it is an 40 blank in the process of being routed by the end mill rout-_
object of the present invention to provide a machine for
ing cut-ter;
quickly and effectively reducing the diameter of the length
FIG. 9 is a section taken partly on the line IX--IX
blank to provide a dowel core having at its ends, heads
ring;
of the same diameter and having an intermediate shank of 45
FIG. l0 is a side view of a cylindrical dowel core
reduced diameter, it being desired that said heads and said
blank which is operated upon by the illustrative machine;
shank form a circumferential groove of slightly less depth
FIG. l1 shows the dowel core blank after it has been
than the thickness of the steel jacket which is to be
operated upon by `the illustrative machine to form a
wrapped about and pressed into said shank.
dowel core;
With the above object in view` and in accordance with 50
FIG. 12 is a view partly broken away showing the
a feature of the present invention, there is provided a ma
dowel core illustrated in FIG. 11 after a metal jacket has
` been wrapped around and pressed into the periphery of a
drical dowel core blanks to an operating or trimming
routed portion of said core; and
station, spaced axially alined centralizing members adapt
FIG. 13 is a schematic view which shows wiring and
ed to be forced »against opposite ends respectively of the 55 fluid pressure means for use in describing the operation
of the machine.
blank at said station to aline an axis of said blank with a
common axis of said members, opposed pairs of spindles
The present invention is disclosed as embodied in a
which are rotatable about the -axis of said members and
machine for routing a median portion of the periphery of
are adapted to 'be moved lengthwise of said axis against
a cylindrical dowel core blank 20 which is made of hard
opposite ends of the core blanks, an end mill cutter ro 60 Wood for example, and is of uniform diameter, whereby
tatable about an »axis disposed at substantially right angles
to provide a dowel core 22 comprising an elongated re
to the common axis of said centralizing members and said
duced median shank portion 22a (FIG. l1), the periph-spindles, said cutter being reciprocable lengthwise of its
ery of which is centered about an axis 22b and which
has at its ends heads 22C defined by cylindrical periph
axis of rotation, means operative in response to move
ment of the cutter toward the axis of rotation of said 65 eries which are also centered about said axis, The
dowel -core 22 is subsequently operated upon by ma
members for first moving said members against the ends
chines such as disclosed in United States Letters Patent
of the dowel core blank to centralize said blank with its
chine comprising'means for successively delivering cylin
axis ‘in alinement with the axis'of said members `and said
Nos. 2,836,218 and 2,880,777, respectively, granted
spindles and for then forcing the spindles into the op
May 27, 1958 and April 7, 1959 on applications filed in
posite ends of said ‘blank to rotate the blank as’the cutter
70 the name of Frank B. Perri to provide a composite
moves toward the blank and prior to and during move
dowel 24 (FIG. 12) comprising the core 22 and a
ment of the cut-ter against the blank, and means for limit
metal jacket 24a which is wrapped about and pressed
3,066,566
'
4
3
into the periphery of the median shank portion 22a of
said core, the ends of the metal jacket being substantially
in engagement with the inner ends of the heads 22e of
the core and having a periphery which is substantially
ñush with the peripheries of said heads.
The dowel core blanks 20 are fed in succession from
a hopper 26 (FIG. 1) to a tube 28 and from said tube
lies slightly to one side of the common axis 74 of the
spindles 68.
In order to insure that the core blanks 20 shall not
have a tendency to slide out of their desired oriented
positions in the channels 50 of the turret ring 48 as they
drop through the tray 42, for example, into said chan~
nels, there is provided an arcuate abutment 8'9‘ (FIG. 2)
adapted to be engaged by the inner ends of the cores.
Secured to the main frame 34 at the outer periphery of
frame 34 of the machine. The guide block 32 has pressed 10 the turret ring 48 is an arcuate abutment 911 which is
engaged by the outer ends of the core blanks 20j as they
onto it a cover 36 which is of U-shaped cross section and
are being indexed thereby insuring that said blanks shall
which holds the core blanks 20 in the raceway of said
not be carried out of their oriented positions in the chan
block, a leaf spring 38 serving to hold said cover in place
into a raceway 30 (FIGS. 1, 2 and 3) formed in the up
per surface of a guide block 32 which is secured to a main
on the block.
The lower end of the raceway 30 is ar
nels 50 by centrifugal force.
ranged opposite an opening 40 (FIGS. 2 and 3) of a
stacking tray 42 which has a vertical slot 44 shaped and
The bearing blocks 72 are slidable equal distances t0
ward and away `from each other in the housings 78, one
arranged to receive a plurality of core blanks 20 in ver
tically stacked relation, the lowermost core blank in
said vertical slot resting on an upper face 46 of a turret
of which is secured by screws 88 (FIG. 4) to the main
spindles 68, are moved toward each other together with
equal distances in opposite directions lengthwise of the
frame 34 and the other of which is secured by screws
90 to the plate 84 which in turn is secured by screws 92
ring ring 48 while the ring is being indexed and until 20 to said one housing, in timed relation with the lowering
and raising respectively of the cutter 80, as will be ex
such time that it falls into one of a plurality of circum
plained later. The spindles 68 have secured to them pul~
ferentially spaced radial channels 50 which are formed in
leys '94 which are operatively connected by belts 96 to
said face and are equidistant from each other. The tur
pulleys 918 secured to a shaft 100 of a motor 102 adjust
ret ring 48 is supported in spaced relation to a circular
plate 54 by a plurality of posts 52, said ring, said posts 25 `ably secured to the main frame 34.
rIhe inner and outer housings 78 have formed in them
and said plate being secured together by screws 56 to
alined rectilinear guideways 10'4 in which is reciprocable
forma composite turret. The circular plate 54 is ro
a slide 106 having secured to it a lug 108 (FIG. 5) mov
tatably mounted on a vertical post 6G fixed to a casing 6‘2
able in an opening 110 of the inner housing 78 and secured
forming part of the main frame 34, said plate being held
on said post by a nut 58 threaded onto the post. As 30 to the associated block 72 in said inner housing. The
outer end of the slide 106 has yformed in it a rack 112
will be hereinafter explained, the post 60 has operatively
(FIGS. 2, 5 and 7) meshing with a pinion 114 which is
mounted on it indexing mechanism which is shown in
journaled for rotation in a recess '116 of the outer hous
detail in FIGS. 4 and 9.
ing 78 and meshes with a rack 118 formed on the as
The turret ring 48 with the core blanks 2()` mounted in
its channels 50 is indexed to move said channels succes 35 sociated bearing block 72, the construction and arrange
ment being such that on reciprocation of the slide 106,
sively to a trimming or routing station 64 where a pair
of centralizing sleeves or blocks or a pair of orienting
by mechanism which will hereinafter be described, the
bearing blocks 72 and their associated spindles 68 move
members 66, which are slidingly mounted respectively on
said spindles to raise the core blanks arriving at the 40 axis 74 of the spindles. The centralizing sleeves 66 are
slidingly -mounted on the spindles 68 as above explained
trimming station from engagement with the bottoms of
and form with- shoulders respectively of the spindles re
the associated channels. Opposing end portions of the
spindles 68 have reduced spool portions 68a (FIGS.
cesses 120 housing springs 122 adapted constantly to urge
the sleeves toward each other on the spindles, movement
The spool portions 68a of the spindles 6‘8 are provided at 45 of said sleeves on the spindles toward each other being
their opposing ends with projecting pairs of prongs 70.
limited by the engagement of the outer ends of slots 124
The spindles 68 are rotatably mounted in and are axially
(FIG. 8) which are formed on the sleeves with pins 126
movable with inner and outer bearing blocks 72 (FIGS.
secured to the spindles. The opposing ends of the sleeves
4, 5 and 7) which slide lengthwise of their common
66 and the spindles 68 may be referred to as jaws and the
axis 74 toward and away from each other in guideways 50 sleeves may be described as normally masking the prongs
76 of inner and outer housings 78 íixed to the main frame
70 of the spindles.
34, whereby to cause the core blanks 20, the axes 22b
The cutter 80‘ is secured by the screws 75 to the shaft
of which at that -time are substantially coincident with
128 rotatably mounted in a sleeve 130 which is slidable
the common axis 74 of the spindles 68, to be rotated
in a vertical guideway 132 (FIGS. 3 and 4) of a housing
about their axes preparatory to and while they are being 55 134 forming part of the main frame 34 »and has formed
operated upon by a rotary end mill tool or cutter 80 which
on it a rack 136 meshing with a pinion 13'8 secured to a
horizontal drive shaft 140 rotatably mounted in bearing
is lowered to rout the median portion of the core blank at
bosses 142 (FIGS. 1 and 3) of the housing. The cut
the trimming station 64. As the cutter 80< is raised after
ter shaft 128 is rotated continuously by a motor 144.
performing the routing operation the turret ring 48 is in
The drive shaft 140 is operatively connected through
dexed through an arc equal 4to the distance between suc 60
a mechanical dwell control unit or overdriving coupling
cessive channels 50, the inner ends of the dowel cores
146 to a shaft 148 which is rotatably mounted in a bearing
22 formed in the machine being tilted upwardly and out
housing 150 secured to the main frame 34. A pinion 152
of the channels 50 by a cam 82 secured to a ñxed plate
84 as they are rotated by the turret ring 48 thereby caus 65 secured to the shaft 148 meshes with a rack 153 of a
connecting rod 154 secured to a piston 156 reciprocable in
ing them to fall out `of the slots and onto a chute 86
a cylinder 158 secured to the main frame 34.
(FIG. 1). It will be noted that the plate 84 is provided
The vertical sleeve y130 has secured to it by `a screw
with a circular recess 85 (FIGS. 2, 3, 4 and 7) through
160 a. collar 162 to which screw is attached a pair of
which the cutter 80 passes.
springs 164 the upper ends of said springs being attached
The cutter 80 which is secured by screws 75 (FIGS. 3 70 to the housing 134, said springs serving to balance to
and 6) to a cutter shaft 128 (FIGS. 1, 3 and 4) here
some extent the weight of said sleeve and its associated
inafter described comprises three radial cutting blades
mechanism. The collar Y162 has a boss 166 (FIGS. 1 and
77 provided with cutting edges 79 which extend to an
3) to which is secured a threaded stop bolt 168 which
axis of rotation 81 of the cutter. It will be noted (FIGS.
passes through :a notch 170 of a projection 172 of thehous
2 and 5) that the axis of rotation 81 of the cutter 80
ing 134 and has threaded onto it a stop nut 174 and a lock
5 and 8) which pass through recesses 69 in the sleeves.
3,086,566
5
6.
nut 176. Upward movement ofthe sleeve 130 in the
is a «roller bearing 205. The swing plate 194 has ful
crumed to it a pawl 196 which is constantly urged clock
wise on said plate, as viewed in FIG. 9, by a spring 198,
vertical guideway 132 of lthe housing 134 is limited by the
engagement of the piston 156 with »a forward end 157 of
the cylinder 158 and downward movement of the sleeve is
said plate having mounted on it a depending cam roll 200
titting in a slot 202 of an actuator portion 204 of a con
limited by the engagement of the stop nut 174 with the pro
necting rod 206. Pivotally mounted on the casing 62
jection 172 of the housing. The piston Á156 has a con
is a spring-pressed detent 208 for insuring against the
stant stroke but the downward limit of movement of the
ratchet 190 moving rearward from> its indexed position
sleeve 130 and accordingly the cutter 80 may be varied
and also an impulse switch 210 having a plunger 212
to therslight extent necessary, in accordance with the
desired depth of the »routing cut, the over driving clutch 10 actuated by a striker 194a carried by the plate 194. The
striker 194a is pivoted on the swing plate 194 and nor
serving to compensate for the over driving of the con~
mally held against a stop pin` 213 on the plate by a
necting rod 154 when downward movement of the sleeve
spring 215.
130 is stopped by the engagement of the stop nut 174
The connecting rod 206 is slidingly mounted in a bear
with the projection 172.
The slide 106 has pivotally connected to it a link 178 15 ing 214 secured to the casing 62 and has secured to it a
piston 216 slidable in a cylinder 218 secured to said bear
(FIGS. 2, 4 and 5) which- is operatively connected to
ing. Secured to the cylinder 21'8 is a Valve 220 having
a lower arm of a bell crank lever 180 journaled on a
a plunger 222 (FIG. 13) which is moved to its operating
bearing screw 182 secured to the main frame 34. ’Ihe
position shownin Afull lines, FIG. 13, by a rod 226 which
upper arm of the bell crank lever is operatively connected
to a link 184 which is provided with a slot 186 through 20 is pivotally connected to the plunger 222 and has secured
which extends the screw 160 which serves to secure the
to it a piston 228 slidingly mounted in a bore 230 of a
cylinder 232. The plunger 222 is moved to a dash posi
collar 1'62'to the sleeve 130.
tion »shown in FIG. 13r by a solenoid 234 operatively con
Secured to the outer housing 78 is a cylinder 179
nected to- the plunger. The piston 228 has a face 236
(FIGS. 2 and 4)- having a bore 1~81` in which is slidable
a> piston 183 -having a face 185.- Seoured to the piston 25 which is open to a line 238 communicating with a port 240
of an air valve 242 having a bore 244 for receiving a slide
1x83 isi a connecting rod 187 which passes through an
246 which has a pin 247 secured to it and which has a
opening 189 in a depending-ilange 191 of the link 178
and‘has threaded onto it a nut 193. The cylinder has a
passage 248 and also a passage 250 leading to an exhaust
port 251. The valve 242 has »also formed in it a port 252
port l195 connected to a line supplying air under pres
sure, a face 197 of the piston 183 at all times being open 30 leading to a high-pressure air line 254. The slide 246 is
normally moved to its position shown in FIG. 13 by a
to exhaust.
:spring 255, the air line 25‘4 being closed olf from the line
The connecting rod 187 constantly urges the link 178
238 which is open to the exhaust passage 250.
to the left, as viewed in FIG. 4, and unless prevented by
The actuator portion 204 (FIG. 9) 0f the connecting
engagement~ of the upper end of the slot 1‘86 with the screw
160 moves opposite pairs of the sleeves 66 and spindles 35 rod 206 is provided with a notch 256 -for receiving a rod
258 which is slidingly mounted in the casing 62 and is
68 toward each other. When the machine is at rest
the screw 160 engages the upper end of the slot 186.
constantly urged to the left, as viewed in FIG. 9, by ~a
spring 260. Adjustably secured to the rod 258 is a block
When- during-the> cycle of theV «machine the sleeve 130 is
262 which is engaged by the actuator portion 204 of the
lowered, Vthe connecting rod 187 immediately moves the
link»1«78» to the left (FIG.l 4) with the result that the 40 connecting rod 206 «during retractive movement of the
ratchet 190 and moves the rod 258 to the right against
spindlesV 68 move equal distancesA toward each other,
the action of the spring 260. The rod 258 has a threaded
conical faces 188 of the centralizing sleeves engaging op
portion 258e to which is secured a striker plate 264
posite ends-'of the 4core blank 20‘and thus causing said
adapted, during the movement of the rod 258 to the right,
blankI to be raised> slightly fromA the Ybottom of its as
sociated' channel 50, the axis 22b of the blank being 45 FIG. 9, to engage the pin 247 of the slide 246 of the air
-valve 242, causing said slide to move to a position -in
movedr into substantial alinement-withthe common axis
which the passage 248 thereof is open to the high-pressure
74 of the spindles. A As- the spindles 68 continue to move
air line 254 and connects this line with the line 238 which
toward 'each other the sleeves 66 yield 0n the spindles
is open to the face 236 of the piston 228.
against the action of the springs 122 and as- the sleeves
The slide 222 of the valve 220 has for-med in it a transfer
continue to» be forced- againstr the core'blank, the prongs
passage 266 and exhaust passages 268, 268a and when the
70 on the spool portions68aA of the spindles are forced in
machine is idle the passage 266 connects a high-pressure
to the opposite‘ends` of said blank with the result. that the
air line 270 to a cylinder passage 272 open` to a -face 274
blank» is rotated atV a speed-equal to that of the spindles.
of the piston 216, a face 276» of the piston being open
By- the time that` the cutter 80 engages the core blank
20, said blank has been centralized and gripped by the 55 through a cylinder p-assage 280 to the exhaust passage
268g, and the piston 216 being in engagement Iwith the
sleeves 66 and the spindles 68; As> the cutter 80 con
left end (FIG. 13) of the cylinder 218, the ratchet 190
tinues downward- toV rout the blank the screw 160 travels
having been indexed to its position shown in FIG. 9.
down- the» slot 1-86- but never hits the bottom of said slot.
The cylinder 158 has associated with it a solenoid valve
When the routing cut has been completed the cutter 80
is raised, the screw 160 which is raised with the cutter 60 l282 comprising a plunger 284 which is slidable in a bore
and the» sleeve-‘130 riding upwardvalong the-slot- »186.
4When the- cutter is- well` 4above the workwthe screw 160
engagesrthe upper end ofthe slot ‘186 and movesY the pairs
.0f- sleeves` 66 `and 4spindles 68V away from each other
296 of the valve and has formed in it a tansfer passage 2'98
and exhaust passages 300, 300m. When the machine is
idle the transfer passage 298 registers with a high-pressure
line '302 and with a cylinder line 304 open to a face 306 of
against the action of the piston 183 to release the work 65 the piston 156, and the exhaust passage 300 is in register
which drops back into its associated slot 50. If desirable a
with a cylinder passage 308 open to a lface 310 of the
piston. 'I'he connecting rod'154 has secured to it a striker
bar 312 provided with a bore 314 through which passes a
the piston 183 constantly to the left (FIG. 4). . r
«_
rod 316 slidingly mounted in the main frame> 3‘4 of the
The'eindexing- mechanism comprises- a ratchet _190l
(FIGS. 4r and 9)--which `has circumferentially spaced 70 machine, and threaded onto the rod is a nut 318, and
secured to the rod is a collar 320, a spring 322 being
notches> 192 and is housed in the casingV 62 and which is
interposed between the collar and the main frame. Se
_secured by screws-»201-’to'the circular plate 54. A Supported
cured to the rear end of the rod 316 is a cam 324 which,
on a face 203 of'the‘casing -62 is aA swing plate 194, and
when the rodl is moved rearward, depresses a plunger 326
interposed‘between- the rachet» 190` and theA swing. plate
on the'one hand andthe vertical postA 60 on t-he other hand 75 of an impulse switch 328. When the machine is idle the
spring- (not shown) may >belused instead of -air to urg
3,086,566
8
piston -156 engages the forward end 157 of the cylinder
158, the rod 316 being held in its position shown in FIG.
13 by the spring 322 and the nut 318 being spaced a sub
stantial distance from the striker bar 312.
The machine is also provided |with an impulse switch
330 for starting the machine through its cycle after it has
been idle, and is also provided with an impulse switch 332
cylinder passage 308 with the result that high-pressure air
is available for t-he face 310 of the piston 156, the face
306 of the piston being open to exhaust. Accordingly the
piston i156 slides to the right (FIG. 13) causing through
mechanism above disclosed the vertical sleeve 130 and
accordingly the rotating cutter 80 to be lowered.
As the screw 160, attached to the collar 162 of the
for use in recycling the machine after it has been started
sleeve :130, is lowered, the connecting rod 187, 'which is
`secured to the piston 183 and is constantly urged to the
and a :bar switch 334 which is used to stop the cycling
10 left, as viewed in FIG. 4, by air pressure, moves the spin
of the machine.
dles 68 toward each other causing the sleeves 66 first to
Current is supplied from a main line 336 to the spindle
centralize the core blank ‘20 located therebetween and
operating motor 102 and to the cutter operating motor
thereafter the prongs 70 of the spindles to penetrate the
144. Power for operating the means through which the
ends of the blank to rotate said blank. During the iirst
cutter 80 is raised and lowered and the turret ring 48 is in
part of the downward movement of the cutter 80 and
dexed is supplied from the main line 336 to a primary coil
accordingly the screw 160, -the link 178 which is biased
338 of a transformer 340, a secondary coil 342 of the
by the air-actuated piston 183 and mechanism above de
transformer being connected to a low-voltage circuit which
scribed, moves to the left as lviewed in FIG. 4, until the
is :powered by closing a switch 344.
sleeve 66 centralizes and grips the dowel core blank 20
When the machine is idle the cutter 80 is stopped in its
at the operating station and the prongs 70 of the spindle
raised position, the piston 156 being in engagement with
68 penetrate said blank causing the same to rotate with
,the face l157 of the cylinder 158 as shown in FIG. 13 and
the ratchet 190, 'which effects the indexing of the turret
ring 48, Ibeingin its position shown in FIG. 9.
Preparatory to :starting the machine a main line switch
the spindles. At this time movement of the piston 183 is
stopped and as the sleeve 130 continues to move down
Ward to lower the tool 80, the stud 160 fwill ride down
346 is closed and switches 348, 350l are then closed to 25 the slot `186 in the link 184 as the blank is being grooved.
As the cutter approaches its raised starting position the
start the motors 102, 144 whereby to rotate respectively
screw 160 engages the upper end of the slot and moves
the spindles 68 and the cutter 80. The switch 344 is also
the link ‘178 to the right (FIG. 4) against the action of
closed to power the low-voltage circuit of the machine.
It is assumed that the hopper 26 and the stacking tray
the connecting rod 187 causing the pairs of spindles 68
42 are supplied with dowel core blanks 20 iand also that 30 and sleeves 66 to be moved away from each other iwith
the result that the core blank 20 returns to the bottom of
core «blanks rest in the radial channels of the turret ring 48
its associated channel 50. It will be understood that the
included between said tray and the trimming station 64.
A plunger 352 of the impulse switch 330 is then pressed
air pressure applied against the face «185 of the piston 183
is suiiiciently great to operate the spindle 68 and the cen
causing a coil 354 of the `solenoid 234 to be energized
with the result that the plunger 222 of the valve 220 is 35 tralizing sleeve 66 but is not so great as to cause the
moved to its dash-line position in which its passage 266
registers Iwith the air intake line 270 and the cylinder pas
sage 280, the exhaust passage 268 of the slide 222 being
in register with the cylinder passage 272, High pressure
dowel core blank to be broken by pressure applied against
its opposite ends.
When the piston 156 has been moved a predetermined
distance to the right (FIG. 13) the striker bar 312, by
causing this piston to move to the right as shown in FIGS.
9 and 13.
rod 316 to a position in which the cam 324 operates the
. air is now available for the face 276 of the piston 216 40 reason of its engagement with the nut ‘318, has moved the
plunger ‘326 of Ithe impulse switch 328 thereby causing a
coil 358 'of the solenoid valve 282 to be energized to move
As the piston 216 moves to the right it swings, through
the slide 284 back to its full line position shown in FIG.
mechanism yabove described, the plate 194 counterclock
wise, »as viewed in FIG. 9, about the vertical post 60, the 45 13 in which the passage 298 registers with the high
pressure line ‘302 and the cylinder passage 304, -the piston
pawl 196 being disengaged from its associated notch 192
156 reversing its movement and causing the cutter 80‘ to
of the ratchet 190 which at that time is held against re
‘be raised -frorn the work back to its starting position.
traction ‘by the detent 208. As the actuator portion 204
As the piston 156 reaches the rear end of its retractive
of the rod ‘258 continues to be moved to the right it en
gages the block 262 and accordingly causes the rod 258 50 movement the striker bar 312 engages a plunger 360 of
the impulse switch 332, the switch 334 at this time being
to force the :striker plate 1264 against the pin 247 of the
closed, causing the coil ‘354 of the solenoid 234 again to
air valve 242 with the result that the passage 248 of the
be energized to initiate the next cycle of the machine. As
slide 246 of this valve connects the high pressure air line
the dowel cores 22 are indexed their inner ends engage
254 to the line 238, causing high pressure air to operate
55
the cam `82 causing Ithem to be tipped up out ofthe chan
against the face 236 of the piston 228 to move the rod
nels 50 and into the chute 86.
226 to its position shown in FIG. 13. When the rod 226
In order to speed the cycle of operation of the machine
is thus positioned the passage 266 of the slide 222 regis
and better the control the trimming operation the striker
ters with the high-pressure line ‘270 and with the cylinder
bar 312, during portions of the ltrimming operation, may
passage 272, the exhaust passage 26811 being open to the
cylinder passage 280. Accordingly, movement of the pis 60 be operatively connected to a pneumatic check 362 (FIG.
ton li216 in the cylinder 218 will be reversed and the pawl
1), the construction and arrangement being such that
the cutter 80 is moved relatively slowly during the trim
196 will be moved into engagement in one of the notches
ming operation but is moved relatively ‘fast during the
192 of the ratchet 190 to index the turret ring 48 sufli
ciently to advance said ring through an arc equal to the
first part of its downward movement and during its up
distance between the core blank receiving channels 50. 65 ward movement.
The block 262 may be initially 'adjusted on the rod 258
Having thus described our invention, what We claim as
to vary the amount of indexing movement lof the ratchet
190'.
Just before the ratchet l190 reaches the forward end of
new and desire to secure by Letters Patent of the United
States is:
1. In a machine for use in the manufacture of dowel
its indexing movement the striker 19411 carried by the 70 cores, means operative »against opposite ends of a Wooden
cylindrical `dowel core blank for centering the opposite
swing plate 194 depresses the plunger 212 of the impulse
switch 210 causing a coil 356 of the solenoid valve 282
to be energized and the slide 284 to move t-o its dash-line
ends of said blank to orient said blank with its axis ar
ranged in a predetermined fixed position, means operative
against opposite ends of said oriented blank for rotating
position (FIG. 13) in which the passage 298 of the slide
registers with the high-pressure air line 302 and with the 75 said blank about its axis, an end mill cutter which is
3,086,566
10
rotatable about -a fixed axis disposed at right angles to
the axis of the oriented core blank and which has project
to grip opposite ends of said positioned blanks, means for
rotating the centralizing members and the spindles about
ing cutting blades extending radially of the axis of rota
tion of the cutter, means -for rotating the cutter about its
axis, and means for moving the cutter lengthwise of its
axis to reduce the diameter of a lengthwise median por
said axis whereby to rotate said blanks, an end mill cutter
which is rotatable about an axis disposed at right angles
to the axis of the spindles and is movable along its axis
toward the laxis of the spindles to reduce a lengthwise
tion of said blank.
median portion of the blank, means for rotating the cutter
2. In a machine ‘fOr use in the manufacture of dowel
about its axis, and means for operating in timed relation
cores, driven rotary jaws movable into engagement with
the turret, the cutter, the centralizing members and the
opposite ends of a cylindrical dowel core blank, which 10 spindles.
has an axis, and adapted to position said blank and to
6. In a machine for 4use in the manufacture of dowel
rotate it about said axis, means for rotating said jaws
cores, a pair of spaced spindles which are rotatable about
and for moving them ltoward and away from each other
a common axis and opposite ends of which are provided
lengthwise of said axis, an end mill cutter which has a
respectively with members adapted to penetrate a cylin
plurality of cutting edges and which is rotatable about an
drical dowel core blank, sleeves which are slidingly
axis disposed at right angles to and oifset slightly at one
mounted on said spindles and have concave faces re
side of the axis of the blank, means for rotating the cutter
spectively adapted to engage opposite ends of the core
about its axis, and means for moving the cutter length
blank to centralize said blank, springs for normally urg
wise of its axis -to reduce the diameter of a lengthwise
ing said sleeves to masking positions beyond the blank
median portion of the blank.
20 penetrating members of the spindles, means for rotating
3. |In a machine for use in the manufacture of dowel
the spindles and the sleeves, means for moving the rotat
ing spindles and the sleeves toward each other causing
cores, means for successively presenting cylindrical dowel
said sleeves to position the opposing ends of the blanks
core blanks to a trimming station, spaced centralizing
and thereafter to yield with relation to the spindles to en
members adapted to be «forced aga-inst opposite ends of
said blanks at said station to position said blanks, 25 able said penetrating members to grip opposite ends of
the blank whereby to rotate the blank about the -axis of
means yfor moving said centralizing members toward
the spindles, an end mill cutter rotatable -about a fixed
and away from each other, spaced spindles which
axis disposed at right angles to the spindle axis and mov
are rotatable about a common axis and are movable
able along its axis toward the spindle axis to reduce the
lengthwise of said axis toward each other to seize opposite
ends of said positioned blanks whereby to rotate said 30 diameter of a lengthwise median portion of the blank,
means for rotating the cutter, means for moving the cutter
blanks, means for rotating said spindles, and an end mill
toward and away from the spindle axis, and means re
cutter which has a plurality of cutting edges, means for
sponsive to movement of the cutter toward the dowel
rotating the cutter about a ñxed axis disposed at right
core blank for causing the spindles to be moved toward
angles to the axis of the spindles, and means for moving
the cutter lengthwise of its axis to reduce the diameter 35 each other to force said sleeves against opposite ends
of the blank to orient the blank with lan axis thereof
of -a portion of said blank.
in alinement with the common axis of the spindles and
4. In a machine for use in the manufacture of dowel
thereafter to cause the blank penetrating members of the
cores, opposite spaced spindles which are rotatable about
spindle to grip the blank for rotation with the spindles,
a common axis and opposing ends of which »are adapted
said cutter as it rotates and moves toward said spindle
to penetrate dowel cor-e blanks, centralizing sleeves
axis being adapted to reduce the diameter of the length
which are movable with and are slidingly mounted on said
wise median portion o-f the blank.
spindles respectively lengthwise of said axis and which
7. In a machine for reducing the diameter of por-tions
have concave faces respectively adapted to engage op
of cylindrical dowel core blanks for the reception of
posite ends of the core blanks, resilient means for normal
ly urging said centralizing sleeves into positions in which 45 metallic jackets which are subsequently wrapped aro-und
l and forced against said portions of reduced diameter, a
their concave «faces mask the opposing ends of the spindles,
pair of spindles which are rotatable about an axis and
means for rotating the spindles and the sleeves, means for
Yare movable lengthwise of said axis toward and away
moving the rotating spindles toward each other causing
from each other and which have opposing end portions
the sleeves to centralize the opposing ends of the blanks
provided
respectively with prongs, orienting members
and, by reason of their engagement with the blanks, to
which have opposing conical faces respectively and are
yield on the spindles against the action of said resilient
mounted upon 4the spindles «for rotation therewith and
means suñiciently to cause the spindles to grip opposite
which are slidable lengthwise of said -axis on the opposing
ends of the blank whereby to rotate the blank about the
end portions of the spindles, springs -for normally caus
axis of lthe spindles, an end mill cutter which has a plural
ing the conical faces of the orienting members to project
ity of cutting edges and is rotatable about an axis disposed
in masking relation beyond the prongs of associated
at right angles to the spindle -axis and which is movable
spindles,
means for rotating the spindles and accordingly
along the cutter axis toward the spindle axis to reduce
the orienting members, and end mill cutter rotatable about
the diameter of a lengthwise median portion of the blank,
`an -axis disposed at right angles to the axis of rotation of
means for rotating the cutter, and means for moving the
60 the spindles, means for rotating the cutter, means for
cutter lengthwise of its axis.
moving the cutter lengthwise of its axis of rotation, means
5. In a machine for use in the manufacture of dowel
for constantly urging the spindles toward each other, and
cores, a tray for Vreceiving dowel core blanks, a trimming
means responsive to movement of the cutter toward the
station, a turret ring having a plurality of radial channels
axis of the spindles for causing said fourth named means
adapted successively to receive the blanks lfrom the tray,
to move the spindles toward each other whereby to cause
means for indexing the turret .ring to cause said channels 65 the conical faces of the orienting members Íirst to cen
successively to receive blanks from the tray and to cause
traline an axis of the cylindrical dowel core blank pre
the channels with blanks in them to be presented succes
sented thereto in alinement with the axis of the spindles
sively to the trimming station, opposing centralizing mem
and then to cause the prongs of the spindles to penetrate
bers which are rotatable about an axis, means Ifor moving 70 the ends of the blank causing said blank to rotate about
the centralizing members toward each other to cause them
its axis, said cutter as it moves toward the spindle axis
to be forced against opposite ends of the blanks at 'the
and against the core blank reducing the diameter of a
trimming station to position said blanks, opposing spindles
which are rotatable about said axis, means Ifor moving the
lengthwise median portion of the blank.
8. In a machine for use in the manufacture of dowel
spindles lengthwise of said axis and toward each other 75 cores, a turret ring having a plurality of circumferentially
3,086,566
12
render .the ñuid pressure means active to move the spindles
'toward each other during Ithe ñrst part of the movement
4of the cutter toward the spindle axis and adapted to render
said fluid pressure means inactive during the last part of
the movement of the cutter away from said spindle axis.
spaced radially extending channels adapted to receive a
median portion of a cylindrical dowel core blank with op
posite ends of said blank projecting beyond'said channel,
means for delivering core blanks successively to the chan
nels of said turret ring at a loading station, a trimming
10. In a machine for use in the manufacture of dowel
station, means for indexing the turret ring step-by-step
cores, means for successively presenting cylindrical dowel
to move the blanks delivered to said channels at the load
core blanks to a trimming station, a pair of spindles which
ing station to the »trimming station, mechanism for orient
are arranged at said station and which are rotatable about
ing each of the cylindrical core blanks as it arrives at the
trimming station and for rotating it about an axis of 10 a common axis and are spaced lengthwise of said axis,
said spindles having respectively »at opposed ends thereof
said blank, an end mill cutter rotatable about an axis
core blank penetrating members, sleeves which have core
disposed at right angles to the axis of the core blank,
blank oentralizing faces and are slidingly mounted respec
means for rotating the cutter about its axis, means for
tively on opposing end portions of the spindles, stops `for
moving the cutter lengthwise of its axis to reduce the
limiting movement of the sleeves in opposite directions
diameter of the median portion of the blank, means re
on the spindles, springs for constantly urging the sleeves
sponsive to the indexing movement of the turret ring
for moving the cutter lengthwise of its axis, and means
toward each other Ion said spindles into idle positions
responsive to movement of the cutter lengthwise of its
'which are controlled yby said stops and in which their
axis for orienting and rotating the core blank.
centralizing faces mask the blank penetrating members
9. In a machine for use in the manufacture of dowel 20 lof thespindles, fluid pressure means for constantly urging
cores, means `for successively presenting cylindrical dowel
the spindles toward each other to cause said spindles to
force the centralizing faces of the sleeves against opposed
core ‘blanks to a trimming station, a pair of spindles which
are -arranged at said station and which are rotatable about
ends 4of the blank whereby to orient said blank with an
axis thereof in alinement with the common axis of the
a common axis and .are spaced lengthwise of said axis,
said spindles having respectively at opposed ends thereof
spindles and thereafter to cause the blank penetrating
members of the spindles to grip the blank for rotation
core «blank penetrating members, sleeves which have core
blank centralizing faces and are slidingly mounted respec
with'the spindles, a sleeve, an end mill cutter journaled
tively `on opposing end portions of the spindles, stops for
in said sleeve for rotation about an axis disposed `at right
angles to the common axis of .the spindles, means for
Ilimiting movement of the sleeves in opposite directions
on `the spindles, springs for const-antly urging the sleeves
toward each other on said spindles into idle positions
which are controlled lby said stops and in which their
centralizin-g faces mask the blank penetrating Imembers
of the spindles, fluid pressure means for constantly urging
the spindles toward each other to cause said spindles to
force the centralizing faces of the sleevesagainst opposed
ends of the blank whereby to orient said blank with an
axis thereof in alinement with the common taxis of the
30
moving the sleeve and accordingly the cutter lengthwise
`of the axis of rotation of the cutter to reduce the diam
-eter of a lengthwise median portion of the blank, and
mechanism openatively connecting with lost motion the
vsleeves to the ñuid pressure means for rendering said
fluid pressure means active to move the spindles toward
_each other to cause the core blank to be yoriented and
rotated prior to and during the operation of the cutter
on the core blank and for rendering said fluid pressure
means inactive to cause the spindles to be moved «away
spindles 'and thereafter to cause the blank `penetrating
members of the spindles to grip the blank for rotation 40 fromd each other after the cutter has operated upon the
with the spindles, an end mill cutter which is rotatable
coreV blank.
about an axis disposed at right angles to the common
References Cited in the ñle of this patent
axis of the spindles and is movable along its axis of
rotation and toward the axis of the spindles and against
UNITED STATES PATENTS
the ‘blank to reduce the diameter of a lengthwise median 45
664,311
Bostwick _____________ __ Dec. 18, 1900
portion of the blank, means for reciprocating the cutter
1,681,183
Heald et al ___________ __ Aug. 21, 1928
toward and away from the spindles, and mechanism opera
~ 2,539,723
Branch ______________ __ Jan. 30, 1951
tively connected to lthe last-named means and adapted to
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