US2278844A - Cooling means for discharge lamps - Google Patents
Cooling means for discharge lamps Download PDFInfo
- Publication number
- US2278844A US2278844A US356390A US35639040A US2278844A US 2278844 A US2278844 A US 2278844A US 356390 A US356390 A US 356390A US 35639040 A US35639040 A US 35639040A US 2278844 A US2278844 A US 2278844A
- Authority
- US
- United States
- Prior art keywords
- tube
- lamp
- envelope
- metal
- cooling means
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
Definitions
- Patented Apr. 7, 1942 COOLING MEANS FOR DISCHARGELAMPS Yictor James 'Francis, North-:- Wembley, and George l-lulbert Wilson, Wembley Park, England, assignors to General Electric Company, a corporation of New York Application September 11, 1940, Serial No. 356,390
- Our invention relates to apparatus for produc ing light of the type wherein the source of light is a high-pressure metal-vapor electric discharge lamp subject to forced gas cooling in operation and wherein the leads to the electrodes of the lamp are carried in sealing stems projecting from the envelope of the lamp.
- the lamps used in apparatus of this type usually have approximately spherical envelopes and are adapted in full operation to dissipate 1 kilowatt or more with a pressure of metal vapor within the envelope of 5 atmospheres or more.
- the leads 4 consist of a plurality of thin metal strips, such as molybdenum strips, having tungsten wires fastened thereto.
- the leads 4 are arranged in spaced relation between an inner tube or cylinder of quartz and an outer quartz tube. These elements are fused together to form In such apparatus, of which optical projection apparatus is a typical example, it is often difiicult to arrange the forced gas cooling means so that it does not obstruct the light emitted from the lamp in the direction required and so that the lamp can be easily and accurately positioned relative to the rest of the apparatus.
- the object of this invention is to provide an arrangement in which the forced cooling means is adapted simul-' taneously to support and cool the lamp without unduly obstructing the light emitted from it and which enables the lamp to be easily and accurately positioned relative to the rest of the apparatus.
- the said forced cooling means com prises at least one hollow tube fitting over a sealing stem of the said HPMV lamp so that gas forced through the tube is directed over the envelope of the lamp, and the lamp is supported by the said sealing stem from the said tube or from a member supporting the said tube and is positioned relative to the rest of the apparatus by argon, at a pressure of about a centimeter and a quantity of mercury the vapor of which is lumin'osity producing during the operation of the a mechanically strong, as tight sealing stem.
- the external end of each of the leads 4 is clamped between the metaltube 3 and'the metal ring 6.
- each tube 3 is connected by a flexible pipe I to a reservoir of compressed air (not shown) from which air is passed into the tube as indicated by the arrow; the air passes out of the tube 3 through orifices 8 and is directed over the envelope of the lamp by means oi:- a.
- the arrangement is supported, and the lamp thereby positioned relative .to the rest of the apparatus (not shown) by means of metal clamps ll supporting the tube 3.
- These tubes and the clamps ll act as extensions of the leads4 to the electrodes 5 and connections to the source .of electric supply (not shown) are taken from the arms I2 of the clamps.
- each tube 9 is a said hollow. tube fitting over a sealing stem
- each tube 3 is a said member supporting a said hollow tube and also the lamp
- each clamp H is a said means supporting a said tube or member as stated in the foregoing statement of invention.
- the HPMV lamp is supported directly by its sealing stems from hollow tubes, such as 9 in the accompanying drawing, by means of rubber stoppers. Air is pressed through the tube by means of bores in the said stoppers and is directed by the tubes over the lamp. The arrangement is supported and the lamp positioned by means of clamps directly supporting the said tubes, and connections to the source of electric supply are taken directly from the leads emerging from the sealing stems.
- a high pressure gaseous electric discharge lamp of the type requiring forced cooling for proper operation and a'cooling system therefor said lamp having a spherical envelope and elongated exposed stems projecting.
- said stems being mounted in opposing positions on said envelope
- said cooling system comprising a metal tube removably fastened to one of said stems and another tube supported by said metal tube about said stem and said metal tube and terminating adjacent said envelope, the wall of said metal tube being perforated at the part thereof in said surrounding tube to permit the flow of cooling gas into said surrounding tube and directly over the surface of said stem and said envelope.
- a high pressure gaseous electric discharge lamp of the type requiring forced cooling for proper" operation and a cooling system therefor said lamp having a spherical enveiope and elongated exposed stems projecting therefrom, said stems being mounted in'opposing positions on said envelope
- said cooling system comprising a metal tube removably fastened to one of said stems and another tube supported by said metal tube about said stem and said metal tube and terminating adjacent said envelope, the wall or said metal tube being perforated at the part thereof in said surrounding tube to permit the flow of cooling gas into said surrounding tube and directly over the surface of said stem and said envelope, said metal tube being a current lead for said lamp.
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Description
Geor' y Their A1 forheg.
Patented Apr. 7, 1942 COOLING MEANS FOR DISCHARGELAMPS Yictor James 'Francis, North-:- Wembley, and George l-lulbert Wilson, Wembley Park, England, assignors to General Electric Company, a corporation of New York Application September 11, 1940, Serial No. 356,390
In Great Britain September 13, 1939 2 Claims.
Our invention relates to apparatus for produc ing light of the type wherein the source of light is a high-pressure metal-vapor electric discharge lamp subject to forced gas cooling in operation and wherein the leads to the electrodes of the lamp are carried in sealing stems projecting from the envelope of the lamp.
The lamps used in apparatus of this type usually have approximately spherical envelopes and are adapted in full operation to dissipate 1 kilowatt or more with a pressure of metal vapor within the envelope of 5 atmospheres or more.
According to the invention in apparatus of the type specified the said forced cooling means com prises at least one hollow tube fitting over a sealing stem of the said HPMV lamp so that gas forced through the tube is directed over the envelope of the lamp, and the lamp is supported by the said sealing stem from the said tube or from a member supporting the said tube and is positioned relative to the rest of the apparatus by argon, at a pressure of about a centimeter and a quantity of mercury the vapor of which is lumin'osity producing during the operation of the a mechanically strong, as tight sealing stem. The external end of each of the leads 4 is clamped between the metaltube 3 and'the metal ring 6.
At its other end each tube 3 is connected by a flexible pipe I to a reservoir of compressed air (not shown) from which air is passed into the tube as indicated by the arrow; the air passes out of the tube 3 through orifices 8 and is directed over the envelope of the lamp by means oi:- a.
metal tube 9 which fits over the sealing stem 2 and is supported and insulated from the tube 3 by means of a rubber stopper H1;
The arrangement is supported, and the lamp thereby positioned relative .to the rest of the apparatus (not shown) by means of metal clamps ll supporting the tube 3. These tubes and the clamps ll act as extensions of the leads4 to the electrodes 5 and connections to the source .of electric supply (not shown) are taken from the arms I2 of the clamps.
It will be seen that in this embodiment each tube 9 is a said hollow. tube fitting over a sealing stem, each tube 3 is a said member supporting a said hollow tube and also the lamp, and each clamp H is a said means supporting a said tube or member as stated in the foregoing statement of invention.
In another embodiment of the invention the HPMV lamp is supported directly by its sealing stems from hollow tubes, such as 9 in the accompanying drawing, by means of rubber stoppers. Air is pressed through the tube by means of bores in the said stoppers and is directed by the tubes over the lamp. The arrangement is supported and the lamp positioned by means of clamps directly supporting the said tubes, and connections to the source of electric supply are taken directly from the leads emerging from the sealing stems.
lamp and has a vapor pressure of 5 atmospheres or more. Two elongated sealing stems 2 project from opposite sides of the envelope I. Each sealing stem abuts against one end of a hollow metal What we claim as new and desire to secure by Letters Patent of the United States is:
1. In combination, a high pressure gaseous electric discharge lamp of the type requiring forced cooling for proper operation and a'cooling system therefor, said lamp having a spherical envelope and elongated exposed stems projecting.
therefrom, said stems being mounted in opposing positions on said envelope, said cooling system comprising a metal tube removably fastened to one of said stems and another tube supported by said metal tube about said stem and said metal tube and terminating adjacent said envelope, the wall of said metal tube being perforated at the part thereof in said surrounding tube to permit the flow of cooling gas into said surrounding tube and directly over the surface of said stem and said envelope.
2. In combination, a high pressure gaseous electric discharge lamp of the type requiring forced cooling for proper" operation and a cooling system therefor, said lamp having a spherical enveiope and elongated exposed stems projecting therefrom, said stems being mounted in'opposing positions on said envelope, said cooling system comprising a metal tube removably fastened to one of said stems and another tube supported by said metal tube about said stem and said metal tube and terminating adjacent said envelope, the wall or said metal tube being perforated at the part thereof in said surrounding tube to permit the flow of cooling gas into said surrounding tube and directly over the surface of said stem and said envelope, said metal tube being a current lead for said lamp.
VICTOR JAMES FRANCIS. GEORGE HUL'BERT WILSON.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB25741/39A GB532621A (en) | 1939-09-13 | 1939-09-13 | Improvements in apparatus comprising gas-cooled high-pressure metal-vapour electric discharge lamps |
Publications (1)
Publication Number | Publication Date |
---|---|
US2278844A true US2278844A (en) | 1942-04-07 |
Family
ID=10232522
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US356390A Expired - Lifetime US2278844A (en) | 1939-09-13 | 1940-09-11 | Cooling means for discharge lamps |
Country Status (4)
Country | Link |
---|---|
US (1) | US2278844A (en) |
BE (1) | BE463638A (en) |
FR (1) | FR926584A (en) |
GB (1) | GB532621A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2528969A (en) * | 1945-03-07 | 1950-11-07 | Michael Reese Res Foundation | Lamp |
US2549328A (en) * | 1945-03-05 | 1951-04-17 | Gen Electric | Electric discharge lamp |
US2650322A (en) * | 1945-09-24 | 1953-08-25 | Gen Electric | High-pressure metal vapor electric discharge lamp |
US3157775A (en) * | 1961-05-03 | 1964-11-17 | Pyrometrics Inc | Radiant heater |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1123841B (en) * | 1959-09-08 | 1962-02-15 | Bodenseewerk Perkin Elmer Co | Radiation source for infrared spectrophotometer |
-
0
- BE BE463638D patent/BE463638A/xx unknown
-
1939
- 1939-09-13 GB GB25741/39A patent/GB532621A/en not_active Expired
-
1940
- 1940-09-11 US US356390A patent/US2278844A/en not_active Expired - Lifetime
-
1946
- 1946-02-20 FR FR926584D patent/FR926584A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2549328A (en) * | 1945-03-05 | 1951-04-17 | Gen Electric | Electric discharge lamp |
US2528969A (en) * | 1945-03-07 | 1950-11-07 | Michael Reese Res Foundation | Lamp |
US2650322A (en) * | 1945-09-24 | 1953-08-25 | Gen Electric | High-pressure metal vapor electric discharge lamp |
US3157775A (en) * | 1961-05-03 | 1964-11-17 | Pyrometrics Inc | Radiant heater |
Also Published As
Publication number | Publication date |
---|---|
BE463638A (en) | |
FR926584A (en) | 1947-10-06 |
GB532621A (en) | 1941-01-28 |
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