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Патент USA US3051366

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Aug- 28, 1962
H. J. ZWALD
3,051,354
FEEDER MECHANISM
Filed March 9, 1960
5 Sheets-Sheet 1
INVENTOR
Henry J. Zn/a/d
ZMCYM
ATTORNEY
Aug- 23, 1962
H. J. ZWALD
3,051,354
FEEDER MECHANISM
Filed March 9, 1960
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ATTORNEY
Aug- 28, 1962
H. J. ZWALD
3,051,354
FEEDER MECHANISM
Filed March 9, 1960
5 Sheets-Sheet 4
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INVENTOR
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Aug. 28, 1962
H. J. ZWALD
3,051,354
FEEDER MECHANISM
Filed March 9, 1960
5 Sheets-Sheet 5
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INVENTOR
Henry J Zwa/d
BY
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ATI'ORNEY
United States Patent 0 " RC@
3,051,354
Patented Aug. 28, 1962
2
1
speed at which this operation was performed resulted in
uneconomical production rates prohibiting the use of eye
3,051,354
Henry J. Zwald, Seneca Falls, NY, assignor to Sylvania
FEEDER MECHANISM
lets in large quantities.
Additional difficulties were encountered in fabricating
Electric Products Inc., a corporation of Delaware
stems of this type due to defective eyelets.
Filed Mar. 9, 1960, Ser. No. 13,927
4 Claims. (Cl. 221—166)
Defects en
countered were primarily of two types; either the partial
closure of the eyelet internal passageway due to deforma
tion of the walls or burrs, or the clogging of the passage
This invention relates to feeder mechanisms and more
particularly to a feeder mechanism for feeding eyelets, and
way by foreign material. Additional problems were due
eyelets.
was virtually impossible due to the small size of the eyelets,
and 100 percent mechanical inspection was impractical.
the like, to a receptor from an unsegregated mass of 10 to eyelets having an out-of-round neck. Visual inspection
Eyelets of various con?gurations have been found useful
Therefore, it was not unusual for stems to be damaged by
an assembler while ‘attempting to force a defective eyelet
primarily as shields to alleviate the problems due to deposi 15 over a lead, thus causing rejection of the stem.
Therefore, it is an object of this invention to increase the
tion of conductive materials released by the tube elements
rate of alignment and sorting of articles such as eyelets or
during operation. The cathodes of some tubes are op
the like from an unsegregated mass of the articles.
erated at relatively high temperatures. At these tempera
It is another object of this invention to decrease ?nished
tures certain of the cathode metals in the cathode base alloy
article rejection due to remedial eyelet defects.
have a tendency to leave the cathode. Additionally, the
It is yet another object of this invention to provide appa
emissive oxide materials, which are present upon the
ratus for delivering groups of oriented eyelets, in sequence,
cathode base to form the electron emitter, are reduced to
from an unsegregated mass of eyelets with a high degree
their pure metals components such as barium, strontium or
of certainty that a full group will be delivered each time.
calcium. These metals ‘also leave the cathode during tube
The above objects and advantages are achieved in one
operation. Furthermore, ?ashing of the getter to remove 25
in the manufacture of electron discharge devices or tubes.
As an example, they have been used in cathode ray tubes
aspect of the invention by the provision of an eyelet feeder
which includes means for placing eyelets in receiving or
positioning members in a hopper containing an unsegre
gated mass of eyelets. Transfer means, for removing the
residual gases during production results in the introduc
tion of metallic particles within the tube envelope. All
of thesematerials deposit on the cooler portions of the
tube such as in the neck region where the leads pass
aligned eyelets from the receiving members and delivering
through the glass to the tube interior.
The ?lament and other electrodes which form the elec
tron gun, such as focusing grids, control grids, and accel
erating anodes, are supported in the tube by the plurality
of conductive lead-in pins which pass through a glass
them to a remote position, are mounted at a transfer
station adjacent the hopper. The eyelet removing or pick
up means ‘are provided with members that are entered into
each of the eyelets.
For a better understanding of the invention, reference
is made to the following description taken in conjunction
stem or wafer sealed to the neck of the envelope. Voltages
of various magnitudes and kinds are impressed on the elec
with the accompanying drawings in which:
trodes to generate, shape, and control the electron beam.
FIG. 1 is a plan view of a feeder mechanism with some
These voltages are connected to the electrodes by the stern
lead pins, which are in turn connected to the external
circuitry. Cathode ray tube stems are generally compact
‘and, as a result, there is little separation between the lead
pins at the stem surface.
parts broken away and some parts omitted in the interest
of simplicity and clarity;
FIG. 2 is a side elevation in partial section of an eyelet;
FIG. 3 is a front elevation of the apparatus with some
parts broken away and some parts in section taken along
the line 3—-3 of FIG. 1;
Deposition of the aforemen
tioned conductive materials on the surface of the stem pro
duces electrical leakage paths between the leads which
undesirably alters the tube function and shortens its
useful life.
One expedient generally employed to overcome this
problem is the corrugation or beading of the glass surface
adjacent the leads. In time, even these corrugations be
FIG. 4 is an elevational view taken along the line 4-4
of FIG. 3;
FIG. 5 is a rear elevational view of the apparatus taken
along the line 5—5 of FIG. 1;
FIG. 6 is a fragmentary view in partial section of a por
tion of the apparatus;
come coated to form the leakage paths. Of the various
FIG. 7 is a plan view of the indexing means taken along
other solutions which have been proposed, one of the most
the line 7—7 of FIG. 3;
successful has been the use of a funnel shaped eyelet
FIG. ‘8 is a plan view in partial section of the turret
secured in an inverted position to the leads at a point
brake taken along line 8—8 of FIG. 3;
spaced above the glass surface. The neck or tubular por
FIG. 9 is a front elevation view taken along the line
tion of the eyelet embraces the lead and is secured thereto. 55
9—9 of FIG. 1; and
The cone shaped portion of the eyelet produces a shadowed
FIGS. 10, 11, 12 and 1-3 are a series of sequential views
area on the stem, adjacent the lead, where the condensa
of the apparatus showing the pick-up of a plurality of
tion or deposition of conductive materials is prevented. In
eyelets for simultaneous transfer to a receptor, and
this manner, the formation of the deleterious leakage can~
not occur.
60 delivery to the receptor.
Wide spread use of the eyelets for this purpose had been
retarded due to the time and cost involved in sorting and
alignment prior to use. Eyelets are mass produced and
are shipped to the tube manufacturer in an unsegregated
mass or bulk. Prior to this invention, eyelets had to be 65
individually selected by hand, oriented, and transported to
Referring to the drawings, the embodiment of the in
vention illustrated comprises a hopper 20, with its bottom
in the form of a rotatable disc or turret 22, mounted on
the apparatus frame or platform 24. A plurality of in
dividual eyelet receiving members 26 are mounted in hous
ings 28 adjacent the periphery of the turret 22. Trans
verse wall 30 divides the hopper and serves as a means
a receptor on the eyelet securing apparatus. The tedious
for containing a relatively large number of eyelets 32 in
ness ‘of this task contributed greatly to operator fatigue,
the major portion 34 of the hopper 20. Eyelet positioning
which in turn resulted in occasionally omitted eyelets with
subsequent rejection of the assembled mount or, if undis 70 means '36 are mounted adjacent the hopper 20 for posi
tioning eyelets in the receiving members 26 while they are
covered in the assembly process, failure of a completed
in the larger portion 34' of the hopper. Eyelet transfer
tube due to leakage currents between the leads. The low
3,051,354
4
means 38 are mounted adjacent the hopper 20, at a trans
explained later. The lower end of each of the receiving
fer station “T,” for removing the eyelets from the receiv
ing members 26 and delivering them to a remote position
members 26 passes through an opening formed in a cam
at which a receptor 40' is located. Receptor 40 forms a
follower 102 and is retained therein by a spring 104. The
cam follower is urged against shelf 46 by spring 106.
part of the apparatus described in my co-pending applica
tion entitled “Securing Apparatus,” Serial Number 13,928,
in the housing ‘and follower, respectively. Replaceable
?led March 9, 1960, and assigned to the same assignee as
nibs 112, la?ixed to each of the followers slide on the
the present application. Indexing means 42 sequentially
rotates the disc 22 thus advancing the ?lled receiving
members 26 from the major portion of the hopper to the
transfer station “T.” Operation of transfer means 38 is
coordinated with the step by step movement of the turret
and operates intermediate the periodic movements of the
receiving members 26.
Referring more speci?cally to FIGS. 1, 3 and 7, the
turret 22 is shown in an indexed or rest position inter
The ends of the spring are retained in recesses 108, 110
shelf in a circular path as the turret is indexed. A surface
cam 114, curved to conform to the path of the nibs 112,
is secured to the shelf 46 in the nib path. Cam 114 is
positioned so that it has a gradual rise 116 beginning at
a point between indexed positions “F” and “G,” a dwell
118 adjacent transfer station “T,” and a rapid drop o?
120 between “T” and “A.” The cam cooperates with the
15 followers to raise the receiving members 26 further above
the surface of the turret for purposes which will be ex
mediate its step by step rotation. Turret 22 is attached
plained later.
‘to central shaft 44 which is rotatably supported by shelf
The eyelet positioning or distributing means 36 for
46 affixed by spacers 48 to the platform 24.
agitating the mass of unaligned eyelets in the hopper in
Periodic operation of ?uid motor 50, by means not 20 cludes an oscillatable trident distributor 122 mounted on
shown, produces the indexing movement of turret 22.
vertical shaft 124. Eyelet contacting members 26, which
Yoke 52, is secured to ram 54 and controls the move
ment of roller 56 which is mounted on one end of bolt 58.
Bolt 58 pivotally secures one end of a link 60 within the
cleft end of a second link 62. The other end of cleft link
may be relatively stiff ‘bristle brushes as shown in FIG. 5,
are af?xed to each finger of the distributor. The dis
tributor 122 positioned on the shaft 124 is so adjusted
that the ends of the brushes 126 are spaced slightly above
62 is pivotally held on platform mounted support 64 by
the ends of the receiving members.
screws 66. Link 60 extends between the roller carrying
Shaft 124 is supported by bracket 128 secured to the
pivot bolt 58 and bifurcated indexing operator 68 where
platform. Arm 130 is mounted on shaft 124 and is piv
it is connected by pin 69. Operator 68‘ is oscillatably
otally connected at one end by screw 131 to a link 132.
mounted about shaft 44 and surrounds ratchet wheel 70 30 Link 132, through screw 133, connects arm 130‘ to a ro
which is secured to the shaft by a pin 72‘. Pawl 74 swivels
tatable disc 134 attached to the output shaft 136 of a
on through pin 76 and is resiliently urged into contact with
gear motor 138. Operation of the motor 138 rotates
the ratchet teeth by spring 78. Stop 80 limits the spring
disc 134, which rotation is translated into oscillation of
urged movement of the pawl and also restrains the pawl
the distributor about the axis of its mounting shaft 124
during indexing. Reciprocation of ram 54 through the
by cooperation of the link 132 and arm 130 since the dis
linkage formed by links 60 and 62 results in the step by
tance ‘between shaft 124 and screw 131 is greater than
step advance of the turret.
the distance between shaft 136 and screw 133. The angu
Referring now to FIG. 8, brake ‘82 restrains the rota
lar movement of the distributor sweeps the brushes over
tion of turret carrying shaft 44, except when the shaft
receiving members at positions “B," “C,” “D” and
is driven in the forward direction by the operator 68, 40 the
“E.”
While a trident distributor 122 has been illustrated
by applying friction to the shaft. The brake comprises a
and described it is conceivable that one or more arms
pair of semi-circular rigid members or brake shoes 84,
may be used, any or all of which may carry brushes or
pivotally mounted by screws 86 to the shelf 46. They are
urged 'by spring 88 against shaft mounted brake drum 90.
Brake shoes 84, 86 are lined with frictional material 92
such as leather. The friction produced ‘by the brake may
be adjusted by using screw 94 to compress or release
the like, for agitating the eyelets contained in the hopper.
A typical eyelet 32, as employed in cathode ray tubes,
which may be fed by the subject feeder is shown in FIG. 2.
The eyelet has a wall thickness of .005 inch. The walls
of the cone shaped portion 140 are inclined 30 degrees
with respect to the eyelet axis and join at 141 with a .050
Referring next to FIGS. 5, 6 and 10, each of the eyelet
receiving members 26 is provided with a recess 96- in one 50 inch long tubular segment or neck 142. The larger end
of the cone terminates in a ?ange 144 having an outer
end. The recess con?guration complements the outer con
diameter of .140 inch. The diameter of the central bore
tour of the particular eyelet ‘32 to be fed by the apparatus.
146 of the eyelet is .036 inch which is substantially the
The central bore 98v of the recess is elongated to provide
same as the diameter of the lead pin. with which it is to
a partial receptacle for receiving foreign matter removed
from the eyelet during the transfer operation as will be 55 be joined. The length of the eyelet is .095 inch and is
spring 88.
'
explained later.
measured ‘along its longitudinal axis which passes through
ery by screws :100. In the embodiment of the invention
the cone and tubular portions centrally. The above re
cited dirnensions are approximate and are offered only
as exemplary of the capabilities of the illustrated em
ings register in sequence, may be designated alphabetically
as “A,” “B,” “C,” “D,” “E,” “F,” “G,” and the previously
moval means includes a brush or eyelet contactor 150
A plurality of receiving member housings 28 are
secured at spaced intervals to the turret adjacent its periph
bodiment of the invention.
shown in the drawings, eight such housings are provided.
The indexed positions of the turret, with which the hous 60 Adverting to FIG. 9, excess eyelets removal means
mentioned transfer station “T.” Each of the housings 28
is ‘provided with a plurality of receiving members 26 ar
ranged in a spaced pattern corresponding to the eyelet
receiver arrangement to be found in the receptor '40. The
receptor pattern is determined by the type of stem to
148 is positioned adjacent station “G.”
The excess re
mounted on bracket 152 fastened to the wall of the hop
per. The receiving members 26 are partially elevated by
cam 114 at this station, as shown in FIG. 3. As the turret
indexes the brush sweeps the ends of the members 26 as
they move past the station, removing eyelets which are
not fully seated in the member and eyelets which may
ment of the receptor 40 is changed to accommodate other 70 be adhering to the sides of the members. When an
tube types, the housings must also be changed to coincide
eyelet is properly seated the ?ange 144 is at or below
the surface of the receiving member and therefore will
therewith.
The position of the receiving members is adjusted so
not be disturbed by the brush.
that the recess bearing ends protrude a short distance
Referring to FIG. 10, the eyelet transfer means 38 at
above the surface of the turret for reasons which will be 75 station “T” includes eyelet pickup means 153 having a
which the eyelets are to be secured. When the arrange
3,051,354
.
5
housing 154 containing a plurality of transfer pins 156
which are aligned in a pattern complementary to the pat-V
tern or grouping of the receiving members 26. Transfer
pin housing 154 is held in an aperture formed in bracket
155. Each of the transfer pins 156 is slidably retained
in a recess 158 in the housing by the cooperation of pin
head 160 and ledge 161 in the recess. Spring 162 reacts
between the pin head 160 and set screw 164 to resiliently
urge the pin to its maximum extension beneath the hous
ing 154.
duced by operation of ?uid motor 222 which is mounted
on bracket 224 secured to the platform. (See FIG. 3.)
Ram 226 of the ?uid motor is connected to member 210
by a relatively rigid disc-type connector 228 clamped
tightly ‘between blocks 230, 232 secured to the member
218. Movement of the member 210 through an aperture
233 in the platform is controlled by shaft 234 and guide
block 236-, both of which are secured to support 238
beneath platform 24. Shaft contacting bushings 240 are
10 contained in recess 242 within a boss 244 formed ad
jacent one end of member 210. The opposite end of the
The con?guration of a typical transfer pin 156 is
slideway is restrained by the walls of groove 246 in
shown in FIG. 6 in greater detail. A uniform diameter
guide block 236.
portion 166 ‘adjacent the free end 168 of the pin has a
Reference will now be made to a typical cycle of oper
diameter at least as large as the bore 146 of the eyelet
32. The free end 168 of the pin is conical and serves 15 ation of the present machine, to facilitate a more thor
ough understanding of the invention. This description
as a guide for the pin when entering into an eyelet. The
will deal with the progressive positioning, feeding and
diametric relation between the pin and eyelet bore pro
transfer of the eyelets in one group of receiving mem
duces an interference ?t which causes the eyelet to ad
bers through the several stations of the machine. How
here to the pin. Tapered pin portion 170 joins the eye
ever, it is to be understood that the mechanism at the
let diameter matching segment 166 to the base diameter
several stations are operative ‘during each index interval
portion 172. In the event that eyelet bore 146 is over
for the sequential positioning, feeding and transfer oper
size, the interference ?t is produced between the tapered
ation.
portion and the eyelet. This pin con?guration allows the
A mass of un-aligned eyelets 32 is placed loosely in
same housing 154 to be used with various eyelets by merely
the major portion 34 of the hopper 20 to a depth of
replacing the pins 156 with those having end diameters 25 several eyelets. Distributor or agitator 122, driven by
corresponding to the eyelet size.
continuously rotating motor 138, is oscillated and thus
Eyelet removal means 174 has a stripper disc or bar
agitates the eyelets. This agitation causes the eyelets
‘176 made with ‘a plurality of through openings 1'7 8. Each
to have a generally random movement. As the eyelets
of the openings 178 is associated with one of the trans
are moved, as for example over the receiving members
fer pins 156. Stripper bar 176 is slidably supported in
at station “C,” the tubular portions of some eyelets
the transfer pin housing '154 by rod 180 which passes
will enter an unoccupied recess 96 in a receiver 26. Note
through the center of the housing. The loose stripper is
that the fact that the ends of the receivers 26 protrude
kept from dropping free of the pins by groove 182 in the
above the surface of the turret 20 (FIG. 5) causes the
rod which cooperates with screw 184.
Bottom surface
eyelets to tumble as they are moved to and fro. This
186 of the stripper 176 is slightly below the plane of the 35 increases the statistical probability of an eyelet being
junctions 188 of the tapered portions 170 and uniform
properly positioned in a receiving member.
diameter segments 166 of the pin when there are no
eyelets held on the pins . When eyelets are present, the
bottom surface ‘186 of the stripper rests on the ?anges
144 of the uppermost eyelet. The stripper bar is dis
placed upwardly from its rest position when the eyelets
are on the pins because the eyelets extend upwardly above
the junction I188 on the pin.
Stripper bar operator means 194 includes a momen
After an interval the turret indexes moving a group
of receiving members to station “D,” and subsequently to
40 station “E.” The positioning or aligning of eyelets also
occurs at both of these stations in the same manner as
described for station “B.” The net result is that when
each of these groups of receiving members 26 reaches
station “F,” in turn, each recess 96 is ?lled with an
eyelet.
v
tarily actuatable ?uid motor 196. Reciprocatable ram 198, 45
The receiving members 26 pass beneath the transverse
of the motor 196, is longitudinally aligned with the strip
wall 30 at station “F.” Wall 30 is spaced far enough
per rod 180. Actuation of ‘?uid motor .196 causes the
ram 198 to strike the end of the rod 180*. Suf?cient force
above the turret surface so that one layer of eyelets may
pass beneath it but a greater quantity will be skimmed off
is delivered to the stripper bar 176 to push the eyelets
and kept in the major portion of the hopper. The wall
50
32 off the pins 156. This removal operation is performed
is resilient so that eyelets are not crushed between the
when the transfer means is in registration with the recep
wall and the turret when the turret is indexed.
tor 40. Motor mounting bracket 200 is af?xed to sup
During the movement from station “F’ to station “G,”
port 155.
the nib 112 which has heretofore moved on the level
Adverting to FIGS. 1, 3 and 4, the transporting means
‘of shelf 46 (FIG. 5-.) encounters the rise 116 of
202 moves the eyelet pickup 153 vertically and horizon 55 surface
cam 114. Cam 114 causes cam follower 102 to rise thus
tally in a prescribed sequence of movements intermediate
extending the receivers 26 above the surface of the tur
the indexing steps of turret 22. Synchronization of these
ret. The ends are therefore above the single layer of
movements is obtained by use of a plurality of timing
eyelets on the surface of the turret. Movement of the
switches, not shown.
receivers through station “G” brings excess eyelet re
Horizontal movement of the pickup means 153 from a 60 moval means 148 (FIG. 9) into play. Brush 150‘ sweeps
position adjacent the receiving members 26 at turret posi
the excess or clinging eyelets from the receivers as they
tion “T” to a position at the receptor 40 is produced by
move by. Those eyelets which are properly seated are
?uid motor ‘204. Pickup means support bracket 155 is
fully within the recess and therefore remain undisturbed.
mounted on a slide 206 movable in a slideway formed by
A subsequent index brings the group of receivers 26
gibs 208 secured to vertical member 210. Roller 212, 65 to transfer station “T.” Operation of eyelet pick-up and
affixed to slide 206, cooperates with yoke 214 secured to
transfer mechanisms are coordinated with the indexing
ram 216 of ?uid motor 204. Reciprocation of ram 216
means so that the eyelet pickup function is performed
causes yoke 214 to move roller 212 and thus the slide in
during a dwell period. Of course, the horizontal trans
the desired direction independent of the vertical position
of the slide. The bright portion of yoke 214 is reduced 70 fer operation may occur during the dwell also or during
the indexing movement of the turret for faster delivery
at 218 to clear the shaved hopper wall section 220 when
rates. The receivers 26, at station “T,” are fully ex
reciprocated. Recess 221 in the hopper wall at “T” pro
tended by the dwell portion 118 of cam ‘114. At the
vides clearance for the pickup means 152 during the
transfer operation.
‘ Reciprocating movement of vertical member 210 is pro
initiation of the eyelet pickup operation the transfer pins
75 156 are at rest above the corresponding ones of the re
3,051,354
7
8
ceivers 26.- Operation of ?uid motor 222 causes a ver
means for sequentially rotating and stopping said~disc
tical member 210 to descend carrying with it the pickup
for moving said receiving members from said one portion
means 153. As the pickup means 153 descends the ends
to a transfer position; eyelet transfer means located ad
168 of the pins enter the eyelets passing into the central
bore 146 of the tubular portion ‘142. Sufficient force is
jacent the transfer position for picking up said eyelets
from said receiving members and delivering said eyelets
‘applied to drive the uniform diameter portions 166 of
the pin .156 into the eyelet until further penetration can
means during the stopping of said disc.
not be made.
In the event that the bore 146 is over
size, the pin 156 enters the eyelets until the tapered por
tion of the pin 170 can be driven no further into the eye
let. As previously explained, an interference ?t is pro
duced between the pin and eyelet deliberately so that
the eyelet will ‘adhere to the pin when the pin is raised.
The descent of the pin through the eyelet rounds the
to a remote position; and means to operate said transfer
2. In a feeder for eyelets the combination comprising;
a hopper, said hopper having a bottom in the form of
1O a rotatable disc; a plurality of reciprocable eyelet receiv
ing members adapted to receive said eyelets in an aligned
position, each of said receiving members peripherally
mounted with the ends thereof in a given plane above
said disc; means for containing a mass of eyelets in one
neck ‘and smooths out any deformation or burrs which 15 portion of the hopper; means for agitating said mass of
eyelets whereby said eyelets are positioned in said re
may be present in the neck. It also cleans the bore 146
ceiving members; means for sequentially rotating and
of foreign matter. The force which pin 156 can apply
stopping said disc for moving said receiving members
is pre-set by spring 162 to prevent bending or distortion
from said one portion to a transfer position; means lo
of the pin in case its penetration to its usual depth in the
eyelet is prevented by non-yielding material.
20 cated adjacent the transfer position operable to elevate
said receiving members above said given plane located
The eyelet removal means 174 descends with the pick
adjacent said transfer position; and transfer means for
up means 153 until the stripper bar ‘176 contacts the
removing said eyelets from said elevated receiving mem
receivers 26. As shown in ‘FIG. 11, the housing 154
bers and delivering said eyelets to a remote position,
continues to descend although the pins 156 and stripper
are arrested thus compressing the springs 162. A pre 25 said transfer means being operable during the stopping
of said disc.
determined amount of pressure, determined by the travel
3. In a feeder for eyelets the combination comprising
of the housing, can thus be applied to the eyelets.
a circular hopper; a rotatable turret forming the bottom
When ?uid motor 222 is reversed the eyelet pickup
of said hopper; a plurality of housings mounted at spaced
means 153 is retracted. As it begins to ascend the trans
fer pins 156 are extended as the springs 162 decompress. 30 intervals on said turret adjacent the periphery of said
turret; a plurality of elongated eyelet receiving members
As the eyelets 32 are lifted out of the recesses 96 in the
each having one end formed to provide a recess com
receivers 26, the eyelet which has been penetrated to the
plementing the outer con?guration of an eyelet to be
greatest degree and therefore is further up on its trans
received therein, said receiving members being mounted
fer pin than its fellows, contacts and lifts the stripper bar
for longitudinal reciprocating movement in each of said
as shown in FIG. 12. In the event that an eyelet should
housings from a given position with said recessed end
become jammed in the recess 96 therefore joining the pin
adjacent said turret surface to an extended position, said
156 and the receiver 26, spring 104 allows the receiver to
receiving members arranged in groupings in each of
be pulled upwardly until the transfer pin or eyelet pulls
said housings, each of said groups of receiving members
loose. This prevents distortion of the receivers 26.
Spring 104 returns the receiver to its proper position after 40 provided with a common cam follower; a transverse wall
across said hopper dividing said hopper into a larger
release of the eyelet or transfer pin.
portion and a small portion; means for agitating a mass
Upon complete retraction of the pickup means 153,
of eyelets contained Within said larger portion; means for
timing means, not shown, operates ?uid motor 204 to
producing step by step movement of said turret whereby
advance slide 206 to bring the pickup over the receptor
40. Fluid motor 222 is once again operated when the 45 said housings are advanced from said larger portion of
said hopper to a transfer position in said smaller por
pickup is over the receptor to lower it to the discharge
tion; cam means located adjacent said transfer position
position (see FIG. 13). Then ?uid motor 196 is mo
for cooperation with said cam follower for extending
mentarily ‘actuated to drive ram 198 sharply against
said receiving members; and eyelet transfer means located
stripper rod 180, The eyelets 32 ‘are driven from the pins
adjacent said transfer position for removing said eyelets
and drop into recesses provided in the receptor. Motor
from said extended receiving members for delivering
222 is operated to retract the pickup 153 and motor 204
said eyelets to a remote position; said transfer means be.
is reversed to bring it back over the turret in opposition
for its next pickup or removal operation.
ing formed to operate intermediate the step by step
The apparatus heretofore described has enabled the
electronics industry to use eyelets as it had never before 55
done. Eyelets which previously would have caused as
sembly di?iculties are readily put into usable form with
out additional handling or sorting operations. Rejection
of cathode ray tube stems for faults ‘attributable to the
eyelets have been reduced thus increasing the produc
tivity of the assembly operation.
movements of said turret.
4. In a feeder for eyelets having an opening extend
ing therethrough the combination comprising a circular
hopper; a rotatable turret forming the bottom of said
hopper; a plurality of housings mounted at spaced inter
vals on said turret adjacent the periphery of said turret;
a plurality of elongated eyelet receiving members each
having one end formed to provide a recess complement
ing the outer con?guration of an eyelet, said receiving
Although one embodiment of the invention has been
member being mounted for longitudinal reciprocating
shown and described it will be apparent to those skilled
movement in each of said housings from a given position
in the art that various changes and modi?cations may be
made therein without departing from the scope of the 65 with said recessed end adjacent said turret surface to an
extended position, said receiving members arranged in
invention as de?ned by the appended claims.
What is claimed is:
1. [In a feeder for eyelets the combination comprising;
a hopper, said hopper having a bottom in the form of a
rotatable disc; a plurality of eyelet receiving members
mounted on said disc and adapted to receive said eyelets
in an aligned position; means for containing a mass of
eyelets in one portion of the hopper; means for position
identical groupings in each of said housings, each of said
groups of receiving members provided wtih a common
cam follower; a transverse wall across said hopper divid
70 ing said hopper into a larger portion and a smaller por
tion; means mounted above said larger hopper portion
for agitating a mass of eyelets contained therein; means
for producing step by step movement of said turret
whereby said groupings of housings are advanced from
ing said contained eyelets in said receiving member; 75 said larger portion of said hopper to a transfer position
3,051,354
10
adapted to enter said eyelet; means for reciprocatingly
moving said pickup means in one plane whereby said
in said smaller portion; cam means located adjacent the
transfer position for contacting said earn followers and
for extending said receiving mieimbers; eyelet pickup
pins enter said eyelets; means for reciprocatingly moving
means reciprocably mounted adjacent the transfer posi
tion for removing said eyelets from said receiving mem
said pickup means in a second plane for positioning said
5 pickup means adjacent said remote position; and means
bers for delivery to a remote position, said pickup means
comprising a plurality of tapered pins arranged in a
grouping substantially complementary to the grouping
of said receiving members in said housing and aligned
therewith, said pins having one end formed with ‘a diarn- 10
eter at least as large as an opening in said eyelet and
for removing said eyelets from said pins.
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,892,567
Smith ______________ __ June 30, 1959
UNITED STATES PATENT OFFICE
CERTIFICATE OF CORRECTION
Patent No. 3'O5l,354
August 28‘i 1962
Henry J, Zwald
It is hereby certified that error appears in the above numbered pat
ent requiring correction and that the said Letters Patent should read as
corrected below.
Column 3, line 43, for "screws" read --- screw ——;
column 5, line 70,, for "bright" read —— hight -—-; vcolumn 7‘I
line 52, for "opposition" read —— position ——; column 8‘7
line 22, strike out "; and transfer means"v and insert the
same after "plane" in line 21, same column 8.
Signed and sealed this 24th day of September 1963.
(SEAL)
Attest:
ERNEST W. SWIDER
Attesting ()fficer
DAVID L. LADD
Commissioner of Patents
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