US2682006A - Means for preventing external coating of water-cooled electric lamps - Google Patents

Means for preventing external coating of water-cooled electric lamps Download PDF

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Publication number
US2682006A
US2682006A US151278A US15127850A US2682006A US 2682006 A US2682006 A US 2682006A US 151278 A US151278 A US 151278A US 15127850 A US15127850 A US 15127850A US 2682006 A US2682006 A US 2682006A
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US
United States
Prior art keywords
water
lamp
cooling
resins
jacket
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
Application number
US151278A
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English (en)
Inventor
Jr Andres Ferrari
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SCOPICON Inc
Original Assignee
SCOPICON Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SCOPICON Inc filed Critical SCOPICON Inc
Priority to US151278A priority Critical patent/US2682006A/en
Priority to GB16823/50A priority patent/GB677679A/en
Priority to DES17476A priority patent/DE844494C/de
Priority to CH288268D priority patent/CH288268A/de
Priority to FR1022425D priority patent/FR1022425A/fr
Priority to BE497600D priority patent/BE497600A/xx
Application granted granted Critical
Publication of US2682006A publication Critical patent/US2682006A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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

  • This invention relates to water-cooled electric lamps of the mercury arc type. As shown by U. S. Patents Nos. 2,435,299 and 2,435,300 such lamps are used for providing a high-intensity light source for micro-projection purposes.
  • the life of a lamp of the above designated type is comparatively short and before the lamp fails completely the light intensity decreases substantially after a comparatively short period of use.
  • the decrease in the intensity of light emanating from the lamp is due to the deposit of a coating on the quartz tube in which the arc is formed.
  • the primary object of the present invention therefore is to prevent the deposit of a coating on the quartz tube of a water-cooled lamp of the above designated type and to increase the life of the lamp.
  • the lamp terminals are disposed within the water cooling jacket, being immersed in the water which flows through the jacket and around the quartz tube for cooling the latter.
  • the jacket tube has a constricted portion so that the conductivity of the water between the lamp terminals is suificiently iii low to enable both terminals to be immersed in i the cooling water.
  • Fig. 1 shows the lamp connected to a waterccoling system having provision for subjecting the cooling water in the system to the action of ion-exchange resins;
  • Fig. 2 is a sectional view on the line 2-2 of Fig. 1.
  • the lamp assembly may be the same as that shown by Fig. 5 of Patent No. 2,435,300.
  • Said assembly includes the quartz lamp tube I 0 disposed within a watercooling jacket l2 and mounted between terminals M and 6 positioned within jacket l2 and immersed in the cooling water which passes through said jacket.
  • the opposite ends of the jacket communicate with tubes l8 and 20, respectively, in a circulatory system which includes a water pump 22 and an air-cooled radiator 24 which in-- cludes a fan 26, as described in the above mentioned Patent No. 2,435,299, and also in the application of Edwin C.
  • a receptacle 28 contains a bed constituted of a mixture of anion exchange resins and cation exchange resins in which preferably the anion exchange resins predominate.
  • This receptacle 28 is in the circulatory system through which the cooling water flows. It comprises a body portion 30 having removable end caps 32 and 34 provided with pipe fittings 36 and 38, respectively, for connection with the water inlet tube 40 and the water outlet tube 42, which is connected to tube 20.
  • a screen 44 is removably disposed adjacent one end of receptacle 28 and a filter 46, preferably a porous metal member, is positioned at the outlet end of the receptacle 23 and is connected to fitting 38.
  • screen 44 and filter 46 confine the body of ion exchange resins to receptacle 28 and that the water is filtered as it passes through filter 46, so that substantially none of the ion exchange resins flow with the circulating cooling water stream into and through the outlet tube 42.
  • the ion exchange resins are in the granular form readily available commercially, for example, those sold by the Rohm 8.: Haas Company under its trade-mark Amberlite or those sold by American Cyanamid Company under its trademark Ionac.
  • Examples of cation exchange resins are (a) the condensation products proucked by condensing a methylene body and a polyhydric phenolic body, e.
  • resins produced by reacting amines with aldehydes such, for example, as the melamine-formaldehydeguanidine resins, phenol formaldehyde polyamine resins and acetone-formaldehyde-polyamine resins (Ionac A 300).
  • the preferred mixture is made by mixing Amberlite IRA-400 with Amberlite ICE-120. While the proportions of the anion exchange resin and cation exchange resin may vary, the preferred mixture consists of 6 parts of anion exchange resin and 4 parts of cation exchange resin. This mixture has been found to give excellent results with the lamp and cooling system hereinbefore referred to using city water in the cooling system. As are well known and commerciall available products, as hereinabove pointed out, further description thereof considered unnecessary.
  • receptacle 28 As used in the cooling system of the light projector now being manufactured and constructed according to United States Patent 2,435,300 and application Serial No. 693,292, four gallons of water per minute are pumped through the jacket 12 of the lamp in order to properly cool the lamp. For this rate of flow of water through said jacket and hence through receptacle 28,. a total volume of about 110 cc. of the ion exchange resins in said receptacle has been found to give excellent results, but it will be understood that the invention is not limited to this quantity of resins. preferably, receptacle 28 is mounted in horizontal position and its internal volume is about one third greater than said volume of the resins in the wet activated state of the latter in which said resins may be obtained from the manufacturer or other source of supply ready for use.
  • the water circulatory system is a closed system, except for water which may be added from time to time to the radiator or storage tank 24 make up for losses, so that subthe anion and cation exchange resins Preferstantially the same water is circulated continuously by pump 22 through the cooling jacket I2 and the other passages of the system.
  • the water is at all times subjected to treatment by the ion-exchange material in receptacle, 1. e., at all times during the operation of the. lamp.
  • the apparatus as actually made and sold, is provided with a flow-controlled switch (not shown) so that the lamp it] cannot be energized unless pump 22 is in operation and water flows through lamp jacket 12.
  • Cooling arrangement for high intensity mercury arc lamps mounted in a jacket through which the cooling liquid passes, said lamps having terminal electrodes exposed to said liquid; comprising a closed circulatory system in which distilled water flows as the cooling liquid, said system including a storage tank for said water, said jacket, pump means for forcibly circulating said water and a container having therein an ion exchanger substance for preventing a build-up of metallic ions and thereby the formation of light absorbing deposits upon said lamp.
  • Cooling arrangement for high intensity mercury arc lamps mounted in a jacket through which the cooling liquid passes, said lamps having terminal electrodes exposed to said liquid; comprising a closed circulatory system in which water flows as the cooling liquid, said system including a storage tank for said water, said jacket, pump means for forcibly circulating said water and a container having therein an ion exchanger substance for preventing a build-up of metallic ions in said circulating water and thereby the formation of light absorbing deposits upon said lamp.

Landscapes

  • Treatment Of Water By Ion Exchange (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Lasers (AREA)
US151278A 1950-03-22 1950-03-22 Means for preventing external coating of water-cooled electric lamps Expired - Lifetime US2682006A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US151278A US2682006A (en) 1950-03-22 1950-03-22 Means for preventing external coating of water-cooled electric lamps
GB16823/50A GB677679A (en) 1950-03-22 1950-07-05 Watercooled electric lamps with means for and method of preventing external coatingsof such lamps
DES17476A DE844494C (de) 1950-03-22 1950-07-09 Einrichtung und Verfahren zur Verringerung unerwuenschter Niederschlaege auf den Aussenflaechen von wassergekuehlten elektrischen Lampen
CH288268D CH288268A (de) 1950-03-22 1950-07-17 Verfahren und Einrichtung zur Verringerung der Bildung von Niederschlägen auf den Rohren von wassergekühlten elektrischen Lampen.
FR1022425D FR1022425A (fr) 1950-03-22 1950-07-24 Procédé et dispositif pour empêcher la formation d'un dépôt extérieur sur les lampes électriques refroidies par l'eau
BE497600D BE497600A (is") 1950-03-22 1950-08-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US151278A US2682006A (en) 1950-03-22 1950-03-22 Means for preventing external coating of water-cooled electric lamps

Publications (1)

Publication Number Publication Date
US2682006A true US2682006A (en) 1954-06-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US151278A Expired - Lifetime US2682006A (en) 1950-03-22 1950-03-22 Means for preventing external coating of water-cooled electric lamps

Country Status (6)

Country Link
US (1) US2682006A (is")
BE (1) BE497600A (is")
CH (1) CH288268A (is")
DE (1) DE844494C (is")
FR (1) FR1022425A (is")
GB (1) GB677679A (is")

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2977492A (en) * 1958-09-26 1961-03-28 Philips Corp Holder for exchangeable, liquid-cooled super high-pressure metal-vapour discharge tubes
US3320456A (en) * 1965-08-25 1967-05-16 Edgerton Germeshausen & Grier Corrosion inhibiting fitting for fluidcooled electric-discharge lamps
US5168194A (en) * 1986-12-02 1992-12-01 Heraeus Noblelight Limited Pulse simmer flash lamp cathode
US5504666A (en) * 1994-07-29 1996-04-02 475231 B.C. Ltd. Light bulb cooling jacket and heat dissipation system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2829099A1 (de) * 1978-07-03 1980-01-17 Shigeru Suga Kuehlvorrichtung fuer eine xenon-lampe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1812745A (en) * 1929-10-02 1931-06-30 Gen Electric Lamp
US2094695A (en) * 1935-03-21 1937-10-05 Gen Electric Vapor electric discharge device
US2245406A (en) * 1936-11-28 1941-06-10 Gen Electric Artificially cooled high-pressure mercury-vapor discharge tube
US2404953A (en) * 1943-07-02 1946-07-30 Gen Electric Electric discharge lamp
US2477396A (en) * 1946-08-27 1949-07-26 Edwin C Weiskopf Projecting microscope and viewing device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1812745A (en) * 1929-10-02 1931-06-30 Gen Electric Lamp
US2094695A (en) * 1935-03-21 1937-10-05 Gen Electric Vapor electric discharge device
US2245406A (en) * 1936-11-28 1941-06-10 Gen Electric Artificially cooled high-pressure mercury-vapor discharge tube
US2404953A (en) * 1943-07-02 1946-07-30 Gen Electric Electric discharge lamp
US2477396A (en) * 1946-08-27 1949-07-26 Edwin C Weiskopf Projecting microscope and viewing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2977492A (en) * 1958-09-26 1961-03-28 Philips Corp Holder for exchangeable, liquid-cooled super high-pressure metal-vapour discharge tubes
US3320456A (en) * 1965-08-25 1967-05-16 Edgerton Germeshausen & Grier Corrosion inhibiting fitting for fluidcooled electric-discharge lamps
US5168194A (en) * 1986-12-02 1992-12-01 Heraeus Noblelight Limited Pulse simmer flash lamp cathode
US5504666A (en) * 1994-07-29 1996-04-02 475231 B.C. Ltd. Light bulb cooling jacket and heat dissipation system

Also Published As

Publication number Publication date
BE497600A (is") 1950-12-16
FR1022425A (fr) 1953-03-04
DE844494C (de) 1952-07-21
GB677679A (en) 1952-08-20
CH288268A (de) 1953-01-15

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