US3764845A - Electric filament lamp - Google Patents
Electric filament lamp Download PDFInfo
- Publication number
- US3764845A US3764845A US00248219A US3764845DA US3764845A US 3764845 A US3764845 A US 3764845A US 00248219 A US00248219 A US 00248219A US 3764845D A US3764845D A US 3764845DA US 3764845 A US3764845 A US 3764845A
- Authority
- US
- United States
- Prior art keywords
- loop
- supporting wire
- lamp
- electric filament
- brace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000004020 conductor Substances 0.000 claims description 6
- 102100021749 LIM and senescent cell antigen-like-containing domain protein 3 Human genes 0.000 description 2
- 101710104347 LIM and senescent cell antigen-like-containing domain protein 3 Proteins 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/18—Mountings or supports for the incandescent body
Definitions
- ABSTRACT The invention relates to an electric filament lamp having a tubular lamp envelope provided with a pinch seal in which two series-arranged filaments are incorporated which are coupled by a brace.
- the brace comprises a loop in which a supporting wire is inserted.
- the shape of the loop and the cross-section of the brace are non-circular, for example, elongate, so as to limit the mutual rotatability.
- the invention relates to an electric filament lamp, in particular a halogen filament lamp, which comprises a tubular lamp envelope having on at least one end a pinch seal with current conductors incorporated therein, two series-arranged filaments being stretched in the longitudinal direction of the lamp envelope, said filaments being connected electrically at one of their ends to the current conductors and, at their ends most remote from the pinch seal, being coupled by means of a brace which in or near the centre of its length comprises at least one loop in which the end of a supporting wire fixed in the lamp envelope is secured, the loop being secured to the supporting wire so as to be non rotatable in the plane in-which the loop is located.
- a filament lamp is known, inter alia, from the Dutch published Pat. application No. 6,902,879.
- the lamp described in the said Dutch patent application comprises a supporting wire of which the end inserted in the loop extends coaxially with the lamp envelope, the supporting wire being formed from a circular wire.
- the filaments permanently assume a prescribed position in the lamp envelope.
- the loop of the brace is secured to the end of the supporting wire by means of a spot weld.
- the brace is prevented from pivoting about the supporting wire. Any pivoting of the brace relative to the supporting wire would actually have for its result that the filaments do not assume the prescribed position in the lamp envelope.
- the electric filament lamp according to the invention is characterized in that the loop and the cross-section of the supporting wire have noncircular shapes which have been chosen to be so that in the assembled condition of the loop and the supporting wire they limit the mutual rotatability thereof.
- a favourable embodiment of the electric filament lamp according to the invention is characterized in that at least at the area of the connection to the loop, the supporting wire comprises at least one flat side against "which a part of the loop bears.
- the supporting wire has an elongate cross-section at least at the area of the connection to the loop.
- FIG. 1 shows an embodiment of the lamp according to the invention and FIG. 2 shows the brace used therein with the end of the supporting wire incorporated in the loop.
- the filament lamp shown in FIG. 1 comprises a lamp envelope 1 which is closed at its baseby a pinch 2.
- Incorporated in the pinch are foils 3, 4 to which the contact members 5, 6 projecting from the lamp and the mandrils 7, 8 are secured.
- the helically wound filaments 9, 10 are stretched in the lamp envelope 1 and are slid with their one end over the mandrils 7 and 8, respectively, and are secured to the wire brace 11 with their other end.
- the filaments 9 and 10 are connected in series by the brace 11.
- a supyorting wire 12 which at its one end is sealed in the pinch 2 and at its other end supports in the space 13 which remains after sealing the exhaust tube.
- the filaments 9, 10 and the supporting wire 12 are supported by a quartz beam 14. y
- the supporting wire is formed from a molybdenum wire having a square cross-section (FIG. 2).
- the brace 11 is wound around the end 15 of the supporting wire 12, as a result of which a loop 16 is formed which is present in the centre of the brace.
- a loop 16 is formed which is present in the centre of the brace.
- the fil aments 9, 10 will thus assume the desirable position in the lamp envelope also when the lamp has been in operation for some time.
- a circular supporting wire may also be used, which has a non-circular, for example flattened, cross-section only at the area of the loop.
- An electric filament lamp comprising a tubular lamp envelope having on at least one end a pinch seal with current conductors incorporated therein, two series-arranged filaments being stretched in the longitudinal direction of the lamp envelope, said filaments being connected electrically atone of their ends to the current conductors and, at their ends most remote from the pinch seal, being coupled by means of a brace which near the centre of its length comprises at least one loop in which the end of a supporting wire fixed in the lamp envelope is secured, the loop being secured to the supporting wire so as to be non-rotatable in the plane in which the loop is located, and wherein the loop and the cross-section of the supporting wire have noncircular shapes which have been chosen to be so that in the assembled condition of the loop and the supporting wire they limit the mutual rotatability thereof.
Landscapes
- Fastening Of Light Sources Or Lamp Holders (AREA)
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
The invention relates to an electric filament lamp having a tubular lamp envelope provided with a pinch seal in which two series-arranged filaments are incorporated which are coupled by a brace. The brace comprises a loop in which a supporting wire is inserted. The shape of the loop and the cross-section of the brace are non-circular, for example, elongate, so as to limit the mutual rotatability.
Description
United States Patent 1191 De Fraeye Oct. 9, 1973 ELECTRIC FILAMENT LAMP 2,218,346 10 1940 Spaeth..... 313/273 x [75] Inventor: Dirk Jules Remi De Fraeye 3,590,305 6/1971 Decaro 313/272 Emmasingel, Eindhoven,
Netherlands Primary Examiner-David Schonberg [73] Ass1gnee: U.S. Philips Corporation, New A istant ExaminerPaul A. Sacher k, Att0meyFrank R. Trifari [22] Filed: Apr. 27, 1972 Appl. No.: 248,219
Foreign Application Priority Data 4 May 19, 1971 Netherlands 7106852 US. Cl 313/272, 313/273, 313/277, 313/279 Int. Cl. H0lj 1/90, HOlj 19/46, l-lOlj 19/48 Field of Search 313/272, 273, 278, 313/279, 275, 277
References Cited UNITED STATES PATENTS Eitel et a1. 33 213 7,
[57] ABSTRACT The invention relates to an electric filament lamp having a tubular lamp envelope provided with a pinch seal in which two series-arranged filaments are incorporated which are coupled by a brace. The brace comprises a loop in which a supporting wire is inserted. The shape of the loop and the cross-section of the brace are non-circular, for example, elongate, so as to limit the mutual rotatability.
4 Claims, 2 Drawing Figures 'PATENTEU [ET 731 ELECTRIC FILAMENT LAMP The invention relates to an electric filament lamp, in particular a halogen filament lamp, which comprises a tubular lamp envelope having on at least one end a pinch seal with current conductors incorporated therein, two series-arranged filaments being stretched in the longitudinal direction of the lamp envelope, said filaments being connected electrically at one of their ends to the current conductors and, at their ends most remote from the pinch seal, being coupled by means of a brace which in or near the centre of its length comprises at least one loop in which the end of a supporting wire fixed in the lamp envelope is secured, the loop being secured to the supporting wire so as to be non rotatable in the plane in-which the loop is located. Such a filament lamp is known, inter alia, from the Dutch published Pat. application No. 6,902,879.
The lamp described in the said Dutch patent application comprises a supporting wire of which the end inserted in the loop extends coaxially with the lamp envelope, the supporting wire being formed from a circular wire. As a result of this it is achieved that the filaments permanently assume a prescribed position in the lamp envelope. In the known construction, the loop of the brace is secured to the end of the supporting wire by means of a spot weld. As a result of this the brace is prevented from pivoting about the supporting wire. Any pivoting of the brace relative to the supporting wire would actually have for its result that the filaments do not assume the prescribed position in the lamp envelope.
It is the object of the invention to provide a lamp construction in which the spot welding of the loop to the supporting wire becomes superfluous.
For that purpose, the electric filament lamp according to the invention is characterized in that the loop and the cross-section of the supporting wire have noncircular shapes which have been chosen to be so that in the assembled condition of the loop and the supporting wire they limit the mutual rotatability thereof.
As a result of the cooperation of the non-circular shape of the end of the supporting wire and the likewise non-circular shape of the loop in the brace, pivoting of the brace relative to the supporting wire is prevented. As a result of this the filament will permanently assume the prescribed position in the lamp envelope.
A favourable embodiment of the electric filament lamp according to the invention is characterized in that at least at the area of the connection to the loop, the supporting wire comprises at least one flat side against "which a part of the loop bears. Preferably, the supporting wire has an elongate cross-section at least at the area of the connection to the loop.
The invention will be described in greater detail with reference to the drawing.
In the drawing,
FIG. 1 shows an embodiment of the lamp according to the invention and FIG. 2 shows the brace used therein with the end of the supporting wire incorporated in the loop.
The filament lamp shown in FIG. 1 comprises a lamp envelope 1 which is closed at its baseby a pinch 2. Incorporated in the pinch are foils 3, 4 to which the contact members 5, 6 projecting from the lamp and the mandrils 7, 8 are secured. The helically wound filaments 9, 10 are stretched in the lamp envelope 1 and are slid with their one end over the mandrils 7 and 8, respectively, and are secured to the wire brace 11 with their other end. The filaments 9 and 10 are connected in series by the brace 11. Furthermore incorporated in the lamp envelope 1 is a supyorting wire 12 which at its one end is sealed in the pinch 2 and at its other end supports in the space 13 which remains after sealing the exhaust tube. On the side of the pinch, the filaments 9, 10 and the supporting wire 12 are supported by a quartz beam 14. y
In this embodiment the supporting wire is formed from a molybdenum wire having a square cross-section (FIG. 2). The brace 11 is wound around the end 15 of the supporting wire 12, as a result of which a loop 16 is formed which is present in the centre of the brace. As a result of the square shape of the loop 16, pivoting of the brace around the lamp axis is prevented. The fil aments 9, 10 will thus assume the desirable position in the lamp envelope also when the lamp has been in operation for some time.
Of course, a circular supporting wire may also be used, which has a non-circular, for example flattened, cross-section only at the area of the loop.
Furthermore it is possible to wind the brace more than once around the supporting wire, so that a number of loops are formed.
What is claimed is:
1. An electric filament lamp comprising a tubular lamp envelope having on at least one end a pinch seal with current conductors incorporated therein, two series-arranged filaments being stretched in the longitudinal direction of the lamp envelope, said filaments being connected electrically atone of their ends to the current conductors and, at their ends most remote from the pinch seal, being coupled by means of a brace which near the centre of its length comprises at least one loop in which the end of a supporting wire fixed in the lamp envelope is secured, the loop being secured to the supporting wire so as to be non-rotatable in the plane in which the loop is located, and wherein the loop and the cross-section of the supporting wire have noncircular shapes which have been chosen to be so that in the assembled condition of the loop and the supporting wire they limit the mutual rotatability thereof.
2. An electric filament lamp as claimed in claim 1, wherein at least at the area of the connection to the loop, the supporting wire has at least one flat side against which a part of the loop bears.
3. An electric filament lamp as claimed in claim 1, wherein at least at the area of the connection to the loop, the supporting wire has an elongate cross-section.
4. An electric filament lamp as claimed in claim 1 wherein the supporting wire has a rectangular cross section, at least at the area of connection to the loop.
Claims (4)
1. An electric filament lamp comprising a tubular lamp envelope having on at least one end a pinch seal with current conductors incorporated therein, two series-arranged filaments being stretched in the longitudinal direction of the lamp envelope, said filaments being connected electrically at one of their ends to the current conductors and, at their ends most remote from the pinch seal, being coupled by means of a brace which near the centre of its length comprises at least one loop in which the end of a supporting wire fixed in the lamp envelope is secured, the loop being secured to the supporting wire so as to be nonrotatable in the plane in which the loop is located, and wherein the loop and the cross-section of the supporting wire have noncircular shapes which have been chosen to be so that in the assembled condition of the loop and the supporting wire they limit the mutual rotatability thereof.
2. An electric filament lamp as claimed in claim 1, wherein at least at the area of the connection to the loop, the supporting wire has at least one flat side against which a part of the loop bears.
3. An electric filament lamp as claimed in claim 1, wherein at least at the area of the connection to the loop, the supporting wire has an elongate cross-section.
4. An electric filament lamp as claimed in claim 1 wherein the supporting wire has a rectangular cross section, at least at the area of connection to the loop.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7106852A NL7106852A (en) | 1971-05-19 | 1971-05-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3764845A true US3764845A (en) | 1973-10-09 |
Family
ID=19813199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00248219A Expired - Lifetime US3764845A (en) | 1971-05-19 | 1972-04-27 | Electric filament lamp |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3764845A (en) |
| BE (1) | BE783623A (en) |
| CA (1) | CA956692A (en) |
| DE (1) | DE2223444A1 (en) |
| FR (1) | FR2138148B1 (en) |
| GB (1) | GB1325658A (en) |
| IT (1) | IT955571B (en) |
| NL (1) | NL7106852A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4414484A (en) * | 1980-07-14 | 1983-11-08 | U.S. Philips Corporation | Electric incandescent lamp |
| US5146134A (en) * | 1990-03-15 | 1992-09-08 | Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen M.B.H. | Halogen incandescent lamp, particularly for operation from power networks, and method of its manufacture |
| US5500566A (en) * | 1991-12-09 | 1996-03-19 | Cooper Industries, Inc. | Light bulb filament dampening system |
| WO2006137036A3 (en) * | 2005-06-24 | 2007-08-09 | Koninkl Philips Electronics Nv | Halogen incandescent lamp and method for manufacturing such a lamp |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2300553B (en) * | 1995-03-10 | 1999-07-28 | Ge Lighting Ltd | Heat source |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2037217A (en) * | 1934-04-17 | 1936-04-14 | Heintz & Kaufman Ltd | Cathode |
| US2218346A (en) * | 1938-07-08 | 1940-10-15 | Spaeth Charles | Gas-filled incandescent electric lamp |
| US3590305A (en) * | 1969-02-26 | 1971-06-29 | Westinghouse Electric Corp | Incandescent projection lamp having a prealigned proximity reflector and filament mount assembly |
-
1971
- 1971-05-19 NL NL7106852A patent/NL7106852A/xx unknown
-
1972
- 1972-04-27 US US00248219A patent/US3764845A/en not_active Expired - Lifetime
- 1972-05-13 DE DE19722223444 patent/DE2223444A1/en active Pending
- 1972-05-16 IT IT24422/72A patent/IT955571B/en active
- 1972-05-16 GB GB2295172A patent/GB1325658A/en not_active Expired
- 1972-05-17 BE BE783623A patent/BE783623A/en unknown
- 1972-05-19 CA CA142,534A patent/CA956692A/en not_active Expired
- 1972-05-19 FR FR727218044A patent/FR2138148B1/fr not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2037217A (en) * | 1934-04-17 | 1936-04-14 | Heintz & Kaufman Ltd | Cathode |
| US2218346A (en) * | 1938-07-08 | 1940-10-15 | Spaeth Charles | Gas-filled incandescent electric lamp |
| US3590305A (en) * | 1969-02-26 | 1971-06-29 | Westinghouse Electric Corp | Incandescent projection lamp having a prealigned proximity reflector and filament mount assembly |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4414484A (en) * | 1980-07-14 | 1983-11-08 | U.S. Philips Corporation | Electric incandescent lamp |
| US5146134A (en) * | 1990-03-15 | 1992-09-08 | Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen M.B.H. | Halogen incandescent lamp, particularly for operation from power networks, and method of its manufacture |
| US5500566A (en) * | 1991-12-09 | 1996-03-19 | Cooper Industries, Inc. | Light bulb filament dampening system |
| WO2006137036A3 (en) * | 2005-06-24 | 2007-08-09 | Koninkl Philips Electronics Nv | Halogen incandescent lamp and method for manufacturing such a lamp |
| US20100207523A1 (en) * | 2005-06-24 | 2010-08-19 | Koninklijke Philips Electronics, N.V. | Halogen incandescent lamp and method for manufacturing such a lamp |
| CN101203936B (en) * | 2005-06-24 | 2011-07-13 | 皇家飞利浦电子股份有限公司 | Halogen incandescent lamp and method for making the same |
Also Published As
| Publication number | Publication date |
|---|---|
| IT955571B (en) | 1973-09-29 |
| FR2138148A1 (en) | 1972-12-29 |
| BE783623A (en) | 1972-11-17 |
| CA956692A (en) | 1974-10-22 |
| FR2138148B1 (en) | 1973-07-13 |
| NL7106852A (en) | 1972-11-21 |
| GB1325658A (en) | 1973-08-08 |
| DE2223444A1 (en) | 1972-11-30 |
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