Патент USA US2398969

April-23', 1946.‘ -
G. c. 5mm‘
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‘2,398,969
ELECTRIC LAMP
Fi1e<_i Jan. 29, 1945
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' JNVENTOR.
i-Grr'orer 62' {?nger
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BY
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Maxi/Maw
. Patented Apr. 23, 1946 '
2,398,969
UNITED STATES‘ PATENT or-ncE- .
2,398,969
_
ELECTRIC LAMP’
Grover 0. Singer, Brownsville, Tex.
Application January 29, 1945, Serial‘ No. 575,087
4 Claims.
(01.176-34) ' .
This invention relates to electric lamps. ,‘
An object of the invention is the provision of
embedded in the base member. and pipes for cool
ing the tubes when the bulb and base member
an electric lamp in which the bulb and base are
are molded.
_ formed integrally of transparent materials, with ,
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Fig. 2 shows a vertical section of a lamp in the I
the.base having a wide passage adapted to be
second stage of completion with the ?laments and
closed by a plug of transparent materials with _. re?ecting materials in position within thebulb.
the inner end of the plug curved to form a re-.
Fig. 3 is a vertical section showing a complete. _
?ecting surface, supports for lead-in wires being
I bulb ready for use.
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imbedded in the base and projecting into the bulb '
Fig. 4 is a horizontal section taken along the
with the inner projecting ends of the supports 10 line 4-4 of Fig. 2.
providing connections for the usual'?laments.
Fig. 5 is an enlarged iragmentary side view of a
Another object of the invention is the ‘pro
?lament and its support.
vision of an electric lamp having a bulb and base
Fig. 6 is an enlarged vertical section of a metal'
member formed integrally of transparent mate
‘tube which is embedded in the molten glass when
rials, the base member having a. wide passage 15 the lamp is cast, and showing a pipe for supplying
through which are adapted to be inserted the ?la
-ments and ?lament supports which are attached
to metal tubes embedded in the base member, said
- cooling ?uid to the tube.
passage being closed by a transparent'plug having
an axial passage through which air is exhausted,
said passage being closed in the usual manner.
A further object-of the invention is the pro
vision of an electric lamp having a bulb and base
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Fig. 7 is an enlarged vertical section of a tube
with the supports and ?laments in position in the
tube.
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Referring more particularly to the drawing, 10
‘ designates a bulb which is formed of transparent
' material, while ll indicatesa base formed in
tegrally with ,the bulb Ill. ‘The outer end of the
member formed integrally of transparent mate
' bulb may have any con?guration suitable for the
purpose, but in this case said outer or closed end
rials, said base member having a wide passage
through which are adapted to be inserted ?la
ments and their supports which are connected to
I2 is‘ providedwith corrugations I3 at its inner
., face for the purpose of di?using the light rays
to eliminate the usual‘ glare of a head lamp. The
-. metal tubes projecting into the bulb and em
bedded in the base, said tubes being applied to
base i I is provided with a relatively wide'passage
the base when the lamp is molded, the inner ends 30 I4 for a purpose which will be presently explained.
of said tubes being initially closed with pipes be
Metal tubes l5 are-embedded in the base mem
ing inserted in the metal tubes for suppling a
ber and have their inner ends‘ closed as shown I
cooling ?uid during the molding operation to pre- _ _ at l6, and these inner ends project into thebulb
vent the heat from melting the inner ends of the
Ill. The outer ends I ‘I of said .tubes are open
;tubes, the closed ends of .the tubes when su?i
and project beyond the outer end I 8 of the base '
ciently cool, being shearedo?' to receive supports
member.
and ?laments, the said tubes receiving lead-in
These tubes ‘are incorporated in the base ll ‘ ‘
wires which are soldered to the outer ends of the
when the bulb and base member are cast from the
tubes with the solder forming a seal to close the
molten glass. However, due to the intense heat
.said outer ends, the wide passage being closed by 40 of the molten glass the metal tubes would melt. .
a plug which is sealed to the walls of the passage, ‘
In order to prevent this, pipes 20 as shown more
the inner end of the plug which is', formed of
particularlyin Figs. 1 and 6 are inserted through
transparent materials being polished or provided
the open ends ll of said tubes and a cooling ?uid
with a re?ecting surface which cooperates with
is forced into the interior or the tubes. Such ?uid '
uniformly arranged triangularly shaped sections
’ may be- an inert gas, such as nltrogenor carbon ‘
of re?ecting material on the inner face of the bulb
dioxide. However, the temperature of the cooling
for directing the light along a predetermined
path.
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. ?uid must be such that the materials ot'the base
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' ‘This invention will be best understood from a
l I will not be chilled.
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After the lamp has been completed to the stage
consideration oflthe following detailed descrip ’ shown in Fig. 1 and has been cooled 'sutliciently
tion, in view of-the accompanying drawing form
the inner closed ends lloi the tubes ii are punc-.
ing a part of the speci?cation; nevertheless, it is
tured or drilledso that both ends of the tubes
to be understood that the invention is not con
will be open. The next step in the manufacture
?ned to the disclosure, being susceptible of such
of the lamp will be the application 01’, beeswax
changes and modi?cations as de?ne no material
or. molasses, or any other suitable material, shown
at 2| to the inner surface of the-basemember ll
departure from the salient features of the inven
tion as expressed in the appended claims.
Inthe drawing:
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surrounding the tubes II. The object of apply
ing beeswax is for the purpose of preventing an
Fig. its a vertical section of a bulb and in
area around each tube from receiving re?ecting
tegrally formed base member with metal tubes '00 materials in order to prevent short circuiting oi
aaeaoes
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the passage ti. The inner end of the plug as
the ?laments. Beeswax or other suitable mate
rial is applied to sections indicated by the nu
meral 22, leaving blank spaces which are covered
by reflecting materials as indicated at 23. In
other words, the application of beeswax or other
‘shown at 45 is curved to form a re?ector and re
?ecting materials may be either applied to the
inner end of the plug or it may be highly polished.
Furthermore the plug may be formed of different
colored glass if desired. -
suitable material to the section 22 of the inner
As shown more particularly in Fig. 3 the com- 1
face of the bulb l0 provides radiating triangu
pleted lamp is illustrated with the ?laments and
larly shaped sections of re?ecting material as
plug 40 in position. The ?laments are supported
shown in Figs. 2, 3 and 4. The inner surface of
,
the base H is likewise covered with re?ecting 10 by the tubes 26 applied to the tubes l 5.
While the ?laments are shown as concentrated
materials except those portions which are cov
within the con?nes of the base member I I, it will
ered by beeswax as indicated at‘ 2| adjacent the 7
be appreciated that the auxiliary tubes 25 may
tubes i5. .
be bent at an angle outwardly from the center
After the re?ecting materials have been applied
as described to the inner surface of the bulb ID a 15 so that the ?laments may be spread outwardly
and in agreater circumference within the bulb
suitable solvent is poured into the bulb through
for increasing the illumination of the lamp.
the passage [4 and the beeswax or other mate
I claim:
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rials are removed, leaving a pattern of re?ecting
1. An electric lamp comprising a base, a bulb
materials as illustrated in Fig. 4.
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As previously explainedthe passage 14 is rela 20 formed integrally with the base, said base hav
ing anaxial passage leading from the interior of
tively wide so that an instrument may be inserted
the bulb to the outside, a glass plug neatly ?tting
through the, passage M for applying the beeswax,
said passage and sealed to the walls thereof, the
for injecting the re?ecting materials. and for in
inner
end of the plug having a curved surface
jecting the solvent to remove the beeswax after
the re?ecting materials have been ?xed in posi-' 25 which ‘forms a re?ector inwardly of the inner end
of the base, the inner wall of the bulb being pro
tion.
vided
with re?ecting material, a ?lament in the
The method of applylngthe re?ecting materials bulb, metal tubes extending through the base and
and the beeswax, molasses or other masking ma
supporting the ?lament.
terials is described in my Patent No. 2,365,224
granted Dec. 19, 1944.
2. An electric lamp comprising a base, a bulb
3D
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Referring more particularly to Has. 6 and _7
formed integrally with the base, said base having
it will be seen that ?laments II are mounted with
in the bulb ill in a particular manner, and the '
tubes l5 are employed as an element of the sup
bulb to the outside, a glass plug neatly ?tting said
passage and'sealed to thelwalls thereof. the in
an axial passage leading from the interior of the
port. As has been previously stated the closed -35 ner end of the plug having a curved surface
which forms a reflector inwardly of the inner
inner end It of each tube has been removed and
a second tube 28 is inserted ‘through the passage
l4 and forced into the open ended tube [5 from
the interior of the bulb III. This tube is provided
with diametrically disposed clamping members
end of the base, the inner wall of the bulb being
' provided with re?ecting material, a‘ ?lament in
the bulb, metal tubes extending through the base
40 and having one end projecting into the bulb, the
other end of said tube terminating at the outer
end of the base, a lead-in wire extending through
each tube, one end of each wire having connec
tions with a ?lament, the outer end of each tube
being closed and having secured therein the ?la
ment wire ends.
3. An electric lamp comprising a base, a bulb
21 and 28. These clamps are formed by splitting
the ends of the lateral protections as shown at
29. The straight end III of the ?lament is then
inserted within the split and the split ends are
then clamped down on the ?lament by a suitable
tool which has been inserted through the pos
sage M.
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formed integrally with the base, said base hav
A lead-in wire 35 is inserted through the outer
ing an axial passage leading from, the interior of
the bulb‘ to the outside, a glass plug neatly ?t»
that the tubes 28, i5 and the wire 36 are in con-. " ting said passage and sealed to the walls thereof,
the inner end of the plug having a. curved sur
ductive relationship. The lead-in wire may ex
face
which forms a re?ector inwardly of the in
tend to the top of the tube 28 or it may terminate
ner end _of the base, the inner wall of the bulb
short of the top. v
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The outer end oi‘each wire 35 as shown at 36 st being provided with re?ecting material, a ?la
open end of each tube II and this wire is ex
tended downwardly into the auxiliary tube 26 so -
ment in the bulb,- metal tubes extending through
the base into the bulb, metal supports mounted
in the inner ends of-the tube and provided with
oppositely disposed lateral clamps, each clamp
_is soldered to the outer end of the tube It and
suf?cient solder is applied to seal the outer ends
of said tubes.
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One of the tubes 26 and likewise the lead-in
wire 35 may form the positive electrode while a
diametrically disposed tube 25:! (Fig. 4) may form
the negative electrode. On the. other hand, two
of the tubes l5 may form the positive so that the
outer ends 36-0! said tubes will engage the usual
contact in a socket while the other two tubes will
be in contact with a metal sleeve‘?! which is
mounted on the threaded base member II.
A plug 40 which is formed of glass is adapted
to close the passage II and it is sealed in place
in the usual manner. This plug is provided with
an axial passage ll through which the air is
exhausted from the bulb l0 after which it is sealed
at 42 in any suitable manner. In other words,
the glass may be fused to close the outer end of
60 receiving the 'end of a ?lament, lead-in wires '
received by the tubes and solder sealing the outer
ends of the tubes and the wires to said tubes.
4. In an electric lamp having a base and an
integrally ‘formed bulb composed of transparent ,
65 materials, the inner surface of the bulb being
provided with trlangularly shaped sections of re
?ecting materials extending from the base to
points adjacent the top surface, said base having
an axial passage, a plug closing said passage, the
70 inner end of the plug projecting into the bulb‘
and provided with a re?ector, a series of ?laments
arranged around the inner end of said vplug and
- conductive means embedded in the base and sup
porting the ?laments.
75
GROVER C. SINGER.