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Патент USA US2132369

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Oct. 4, 1938.
w. J. GEIGER
2,132,369
Al.
LAMP MAKING APPARATUS
Filed Jan.‘ 29, 1938 -
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2,132,369
Patented Oct. 4, 1938
- UNITED STATES PATENT OFFICE ‘
2,132,369
LAMP MAKING APPARATUS
Walterv J. Geiger and Reginald J. Ayres, Cleve
land Heights, Ohio, assignors to General Elec
tric Company, a corporation of New York
> ' '
Application‘Jam/lary 29, 1938, Serial No. 187,709
6 Claims.
Our invention relates to apparatus for accu
rately locatingv or prefocussing the light source
of an electric ‘lamp with respect to a reference
surface of the lamp such as a portiorr of an as
sociated base.
I
,In the manufacture of certain lamps, such as
those used for projection purposes, it is highly
desirable to locate the light source in a very ac
curate predetermined position with respect to a
portion of a base, for example. Heretofore, all
such accurate positioning operations have been
con?ned to apparatus comprising a single sta
tionary head having a ?xed holder for the lamp
base and an adjustable holder for the bulb con
15 taining the light source, an image of the light
source being projected by associated optical ap
paratus on a suitable screen, and the
bulb
holder being adjusted to bring the said image to
the correct position on the said screen, after
20 which the lamp base was permanently united to
the,‘ bulb. Multiple head machines were used
only to locate mounts carrying the light sources
in approximately the correct position with ref
erence to the bulbs and bases and it was thought
25 that these machines were incapable of pro
ducing the high degree of accuracy now de
sired. In these machines, an optical device, or
focal gauge, was mounted rigidly with reference
to the center shaft and the lamp heads were
30 also mounted rigidly on a turret which rotated
with the center shaft as an axis. Any warp
'ing of the turret immediately caused misalign
ment of the heads.
.
One of ‘the objects of our invention is to pro
vide a multiple head machine for very accu
rately prefocussing an electric lamp by optical
means. According to our invention, this object
is attained by providing means for causing the
optical apparatus and each of the heads onga
40 movable carrierto be accurately in predeter
mined relationship when the heads are brought
before the optical apparatus by movement of
the carrier. Further objects and advantages
of our invention will appear from the following
45 detailed description of species thereof and from
‘the drawing.
In the" drawing, Fig. 1 is a perspective view
showing the turret of a multiple head basing
machine, only one of the heads being illustrated
and also showing in operative relation thereto
apparatus for accurately locating a lamp ?la
ment with respect to a base in accordance with
our invention; Fig. 2 is a side elevation of a
portion of a head of the basing machine and
means for aligning the optical apparatus there
(01. 176—3)
with; and Fig. 3 is a side elevation of a portion
of a modi?ed head of a basing machine and
modi?ed aligning means.
Referring to Figs. 1 and 2 of the drawing,
a lamp bulb I0 and base II which are to be 5
cemented together are carried in separate hold
ers of a head l2 mounted at the periphery of
the carrier or turret l3. The head I2 shown
is only one of a plurality of heads usually
mounted on the turret l3 and is advanced by 10
regular indexing movements of said turret l3
which carry it through a series of stations‘ at
which the basing operations are preformed as
disclosed in Patent 1,708,756., J. T. Fagan et al.,
'Of April 9, 1929. An operator sits adjacent a 15
few of these stations and inserts the bulbs I0
and bases ll into the heads l2 as they pass
before her and- a second operator sits adjacent
the optical apparatus l4 located at a succeeding
station and adjusts the bulb l0 until the ?la 20
ment l5 therein is properly located with refer-'
ence to the base II. The remaining stations
are occupied by burners and other mechanisms
(not shown) used__to harden or set the cement l6
located in the base II and to perform the other 25
usual operations associated with the basing and
testing of the lamp.
.
The bulb I0 is inserted into the base H prior
to being placed in the basing machine and both
are placed in the head l2 by a single movement 30
of the operator during an interval in which the
?nger I‘! at the upper end of the head is swung
up and back. During this period the bulb Ill
rests very lightly on the ring of cement IS in
the base I l and the leading-in wires I 8 and I9 35
extend respectively upward through an aperture
in the insulating plug 20 and laterally through
a slit in the shell of the base II. The bulb I0
is lowermost and closes off the open end of the
cup-shaped holder 21 to which a source of vac 40
uum is connected which holds the bulb ?rmly
in place. The base II in this case is a type
having a reference surface or engagement means
consisting of a flange 22 at the end of the shell
adjacent to the bulb l0 and is placed in the 45
basing machine with said ?age 22 ?tting snugly
in an aperture in arm 23 and- seating against
the shoulder 24 therein. The bulb l0 and‘base
H are preferably ‘orientated so that the lat
erally projecting leading-in wire I9 extends 50
radially outward from the turret l3. After the
bulb l0 and base II have been placed in the
head 12, the ?nger I1 is lowered" onto the upper
end of said base ll so that it is held ?rmly in
place in the, shouldered aperture 24 and is there- 55
2
7 by de?nitely located.
2,132,869
The ?nger I1 is pivoted
on the pin 25 mounted in the upper end'of the -
frame 26 of the head l2 and is pressed against
the base II by the torsion spring 21.
Following the insertion of the bulb l0 and base
|| into the basing head l2, said head t2 is in
dexed into a station before the optical apparatus
M which focuses on the screen 28 two enlarged
images of the lamp ?lament l5 taken from direc
10 tions at right angles to eachother in a horizon
tal plane. In this particular instance the ?la
ment I5 is brought to incandescence to produce
the light for projection of its image by the com
pletion of an electrical circuit therethrough by
15 the pairs of jaws 29 and 30 which engage the leads
l8 and. I9 respectively. These jaws 29 and 30
move down to grip the leading-in wires l8 and I9
and are of the type shown in the Fagan et a1. Pat
ent 1,724,831. The optical apparatus | 4 is of the
20 type shown in said Patent 1,724,831 and consists
of a housing 3| supporting two optical systems
each consisting of the lenses 32 and 33, prism 34
and mirror 35 which sight the ?lament | 5 from
directions'at right angles to each other in a plane
25 perpendicular to the longitudinal axis of the bulb
Ill. The housing 3|, as shown, is fastened to a
bracket 36 which in turn is fastened to the block
31 mounted on the center column 38 of the basing
‘machine. The center column 38 extends through
30 a sleeve 39 to which the turret I3 is attached and
in this instance is the only support for the hous
ing 3|. The images of the ?lament l5, as viewed
by each section of the optical apparatus, appear
enlarged at the sides of the frosted glass screen
35 28 which is provided with a pair of vertical hair
40
45
50
55
of the basing head I 2. The spindle 49 extends
through said arm 52' and a lower arm 53' of the
frame 26 and is connected by a ?exible hose 53
to a source of vacuum rotating with the turret.
The vacuum reaches the cup 2| through a bore
in the spindle 49, the block 46 and the slides
45 and 4l. The spring 54 located between the
upper arm 52' of the frame 26 and the block 55
on the spindle 49 expands as the cup 2| and the
spindle 49 are moved down.
10
We have found that in some cases the appa
ratus described above is not sufficient to cause the
bulbs Ill to be uniformly based with the ?lament
|5 within the required limits since the rigidity of
the optical apparatus l4 and the turret l3, the 15
uneven expansion and contraction of the machine
parts, etc;, cause misalignment of these parts.
In the apparatus shown in Figs. 1 and 2, we pro
vide means for locating each head |2 laterally or
circumferentially of the turret and vertically with 20
respect to the optical apparatus M to assure the
required accuracy of basing. The circumferen
tial alignment of the head I2 is brought about
by the insertion of a plunger 56, located in slide
ways in the vertical portion of a bracket 51 ex
tending from the housing 3| and in permanent
alignment with the optical apparatus, into the
aperture 58 in the frame 26 of the basing head
l2. This plunger 56 is of such width as to snugly
engage the sides of the aperture 58 and is tapered 30
at the end so as to enter said aperture and turn
the head I2 slightly in a. horizontal direction to
the correct position when it is misaligned. In this
case, the slight lateral movement of the head is
provided by a slight rotational movement of the 35
lines 40740 and a horizontal hair line 4| for in- ' turret l3. Vertical clearance is provided for the
dicating the center of the desired position of the plunger 56 in the aperture 58 so that it does not
filament IS.
affect the vertical position of the head. The
The machine is constructed and adjusted so plunger 56 is moved by the lever 59 fastened to
that the ?lament |5 is correctly located with ‘re
the shaft 60 supported in the bracket 51. Said
spect to the base II when the images thereof are lever 59 engages the pin 6| extending from said 40
centrally located about the intersections of the plunger 56 and is operated atv the proper inter
hair lines 40 and 4|. An operator viewing the vals by means (not shown), which may be the
screen 28 isrequired to make the proper adjust
means for operating the pairs of jaws 29 and 30.
ment of the bulb ID to bring the ?lament |5 in The heads l2 are aligned vertically with respect
45
this position. The operator brings about the ad
to the optical apparatus H by means of the roller
justments required by rotating the knurled screws 62 on the horizontal arm portion of bracket 51
42 and 43‘ and the knurled wheel 44 to shift the which engages the top horizontal surface of the
position of the bulb-holding cup 2|.“ As shown, arm 23 when the heads l2 are indexed into posi
the cup 2| is mounted on a slide 45 located in tion before said apparatus and either lifts the
ways in the block 46 which is also provided with optical apparatus M to a given predetermined
ways for the slide “which in turn is mounted relation to the head |2 or presses the head I2
by means of a bracket 48 on the spindle 49. down to a given height. In this case the very
Movement of the slide 45 and block 46 moves the slight adjustment required is provided from spring
bulb ID in a horizontal plane in directions at right in the parts, although the optical apparatus |4
angles to the axes of the pairs of lenses 32 and 33 could of course be made vertically adjustable on
so as to shift the images of the ?lament |5 lat
the column 38. The roller 62 is held in place on
erally on the screen 28 and is brought about in the bracket 51 by the plate 63 attached thereto.
each case by movement of the screws 42 and 43 The housing 3| for the optical apparatus l4 and
respectively in or out of the block 46. Both screws the bracket 51 are extremely rigid so that there
42 and 43 engage threads in the block 46 and each is little chance of any misalignment occurring in 60
is provided with an integral collar 58 which en
gages a groove 50' in each slide 45'and 4'! respec
tively. A pair of springs 5| (only one being shown
65 in Fig. 2) located partly within wells in the block
46 and engaging tongues extending from the slides
45 and 41 (only tongue 5|’ on slide 45 being
shown) take up all play in the adjustment means
for slide 45 and block 46, i. e., the loose ?t
70 of threads and the loose ?t of the collars 56 in
the grooves in said slides 45 and 41. _ The knurled
wheel 44 is threaded on. the spindle 49 which
causes the bulb II] to be raised and lowered as the
wheel 44 is turned. The said wheel 44 rests upon
1" the bearing 52 on'the arm ‘52' of the frame 26
this portion of the apparatus. Since the roller
62 ‘engages the arm 23 which supports the base
| | directly and the plunger 56 engages the frame
26 which is particularly rigid and fastened tightly 65
to the arm .23, there is little possibility of any
misalignment occurring in any part of the appa
ratus.
»
‘
Should the carrier for the heads |2 be of an
other construction such as, for instance, an end
less belt or a more flexible turret, or be subjected
70
to more heating and cooling, means may also be
provided, as shown in the modi?cation in Fig. 3,
for locating the head I 2 in all planes. In this case
the head |2 or the optical apparatus, which 75
3
2,182,869
'
,
ever is the more ?exibly mounted, is positioned
vertically by the roller 62 on the bracket 51'.
and in all ‘other planes by the plunger 64. The
bracket 51' corresponds to the bracket 51 in Figs.
1 and 2 and is fastened'rigidly to they housing 3|
of the optical means. The plunger 64 is slidably
cent the. path of movement of said head for in
dicating when the light source of, said lamp is
accurately located with respect _to a reference
surface on the lamp, and means for causing said
optical apparatus and said head to be accurately
mounted in a hole in the bracket 51 which def-v
movement of said carrier, said means comprising
initely ?xes its position and is moved down by‘
lever 66 into a hole 65 in the frame 26' of the
10 basing head l2 in which it fits quite snugly. The
end of plunger 64 is tapered so as to pass into
the hole or aperture 65 when the head I2 is slight
ly oif position. The lever 66 engages’ the plunger
64 through a pin 61 on said lever extending into
15 a groove in the upper end of said plunger and is
pivoted on the ‘pin 68 supported by the bracket
51'. As in the former instance, the means (not
shown) for operating the jaws 29 and 30 may, for
instance, be used to operate the lever 66 and
Obviously the turret III of Fig. 1
20 plunger 64.
aligned in predetermined relationship when said
head is brought before said optical apparatus by
an arm extending substantially horizontally from
said optical apparatus and arranged to engage 10
a substantially horizontal surface on said head
to vertically align said head and optical apparatus.
4. .In a device of the type described, the com
bination of a carrier constructed and arranged
to move in a substantially horizontal plane hav 15
ing a head mounted thereon for supporting an
electric lamp, optical apparatus mounted adja
cent the path of movement of said head for in
dicatlng when the light source of said lamp is
accurately located with respect to a reference 20
on the lamp, and means for causing said "
and the optical apparatus l4 are quite rigid in surface,
optical apparatus and said head to be accurately
a radial direction and if that type of construc
aligned in predetermined relationship when said
tion is used with this latter type of positioning head is brought before said optical apparatus by
apparatus (Fig. 3), some freedom of movement in ' movement of said carrier, said means compris 25
25 a radial direction must be provided for either ing an arm-extending substantially horizontally
the optical apparatus of the heads. This free
from said optical apparatus and having a spac- _
dom may consist, for instance, of a slidable ing roller thereon arranged to engage a substan
mounting forthe optical apparatus I4.
tially horizontal surface on said head to vertical
While we have shown and described certain -ly align said head and optical apparatus.
.30
preferred
species
“of
our
invention,
it
will
be
ob
30
5. In a device of the type described, the com
vious‘to those skilled in the art that various bination of a carrier constructed and arranged
changes, substitutions and omissions may be
to move in a substantially horizontal plane and
made therein without departing from the spirit having a head mounted thereon for supporting
of our invention. For instance, in ‘some cases an electric lamp, optical apparatus mounted ad 35
35 extremely accurate positioning of the ?lament jacent the path of movement of said head for‘ in
may be required only in a vertical direction, i. e., dicating when the light source of said lamp is
for light-center length, in which event the later
accurately located with respect to a reference
ally aligning means comprising plungers 56 and surface
on the lamp, and means for causing said
64 may be omitted.
optical apparatus and said head to be accurately
What we claim as new and desire to secure by _ aligned in predetermined relationship when said
40
Letters Patent of the United States is:
head is brought before said optical apparatus by
1. In a device of the type described, the com
movement of said carrier, said means compris
bination of a movable carrier having a head ing a plunger on~said optical apparatus con
mounted thereon for supporting an electric lamp, structed and arranged to enter a closely ?tting
45
optical apparatus mounted adjacent the path of
45 movement of said head for indicating when the aperture in said head to horizontally align said
and optical apparatus, and an arm extend
light source of said lamp is accurately located ' head
ing horizontally from said optical apparatus and
with respect to a reference surface on the lamp, arranged to engage a horizontal surface on said
and means for causing said optical apparatus head to vertically align said head and optical ap
50
and said head to be accurately aligned in pre
determined relationship' when said head is paratus.
6. In a device of the type described, the com
brought before said optical apparatus by move
bination of a movable carrier having a head
ment of said carrier.
_
thereon comprising a ?xed holder for a lamp
2. In a device of the type described, the com
base and an adjustable holder for a lamp bulb
bination of a movable carrier having a head containing a light 'source,‘ optical apparatus 55
55 mounted thereon for supporting an electric lamp,
mounted adjacent the path of movement of said
optical apparatus mounted adjacent the path of head
for indicating when the light source of said
movement of said head for indicating when the
lamp is accurately located with respect to said
light source of said ‘lamp is accurately located. base,
means for causing said optical appara,
60
with respect to a reference surface on the lamp,
60 and interlocking engagement means on said head and said head to be accurately aligned in pre
determined relationship when said head is
and optical apparatus for causing them to be ac
curately aligned in predetermined relationship brought before said optical apparatus by move
ment of said turret, and means for adjusting
when said head is brought before said optical ap
said bulb holder to locate the said light source 65
paratus by movement of said carrier.
in a predetermined position with respect to the
65
3. In a device of the type described, the com- ,
bination of a carrier constructed and arranged said base.
to move in a substantially horizontal plane hav
WALTER J. GEIGER. ‘
ing-a head mounted thereon for supporting an
70
electric lamp, optical apparatus mounted adja-y
REGINALD J. AYRES}.
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