GB574719A - Improvements relating to incandescent electric lamps - Google Patents

Improvements relating to incandescent electric lamps

Info

Publication number
GB574719A
GB574719A GB38/44A GB3844A GB574719A GB 574719 A GB574719 A GB 574719A GB 38/44 A GB38/44 A GB 38/44A GB 3844 A GB3844 A GB 3844A GB 574719 A GB574719 A GB 574719A
Authority
GB
United Kingdom
Prior art keywords
screen
filament
screens
electric lamps
lamps
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
Application number
GB38/44A
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.)
Siemens Electric Lamps and Supplies Ltd
Original Assignee
Siemens Electric Lamps and Supplies Ltd
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
Priority to US22497D priority Critical patent/USRE22497E/en
Priority to US509628A priority patent/US2339243A/en
Application filed by Siemens Electric Lamps and Supplies Ltd filed Critical Siemens Electric Lamps and Supplies Ltd
Priority to GB38/44A priority patent/GB574719A/en
Publication of GB574719A publication Critical patent/GB574719A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K7/00—Lamps for purposes other than general lighting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

574,719. Incandescent lamps. SIEMENS ELECTRIC LAMPS & SUPPLIES, Ltd., and ALDING- TON, J. N. Jan. 3, 1944, No. 38. [Class 39 (ii)] A bright light source for a gas filled high wattage incandescent electric lamp consists of a filament 17, 18, around which a screen of translucent, diffusive refractory material 23 is vertically disposed so as to cause the visible energy from the filament to appear as a glowing mass. The screen may be designed to give a desired polar distribution of light. Sufficient space is left between the filament and the screen to permit free circulation of the convection stream of the inert filling. To avoid the direct transmission of light small auxiliary diffusing screens 26, may be provided at the top and bottom of, and to overlap the screen 23, which may, for example, be cylindrical or spherical. The screens may be supported by the filament supports 11. A mirror may be formed on a portion of the interior of the screen 23.
GB38/44A 1943-11-09 1944-01-03 Improvements relating to incandescent electric lamps Expired GB574719A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US22497D USRE22497E (en) 1944-01-03 Signal lamp
US509628A US2339243A (en) 1943-11-09 1943-11-09 Signal lamp
GB38/44A GB574719A (en) 1944-01-03 1944-01-03 Improvements relating to incandescent electric lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB38/44A GB574719A (en) 1944-01-03 1944-01-03 Improvements relating to incandescent electric lamps

Publications (1)

Publication Number Publication Date
GB574719A true GB574719A (en) 1946-01-17

Family

ID=9697279

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38/44A Expired GB574719A (en) 1943-11-09 1944-01-03 Improvements relating to incandescent electric lamps

Country Status (2)

Country Link
US (1) USRE22497E (en)
GB (1) GB574719A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2818521A (en) * 1954-01-14 1957-12-31 Scarborough Associates Inc Lamp

Also Published As

Publication number Publication date
USRE22497E (en) 1944-06-20

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