GB397719A - Improvements in electric lamps - Google Patents

Improvements in electric lamps

Info

Publication number
GB397719A
GB397719A GB32376/32A GB3237632A GB397719A GB 397719 A GB397719 A GB 397719A GB 32376/32 A GB32376/32 A GB 32376/32A GB 3237632 A GB3237632 A GB 3237632A GB 397719 A GB397719 A GB 397719A
Authority
GB
United Kingdom
Prior art keywords
bulb
reflecting surface
focus
transparent
concentrated
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
GB32376/32A
Other languages
English (en)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB397719A publication Critical patent/GB397719A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H01K1/32—Envelopes; Vessels provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof
    • H01K1/325—Reflecting coating

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
GB32376/32A 1931-11-16 1932-11-16 Improvements in electric lamps Expired GB397719A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH397719X 1931-11-16

Publications (1)

Publication Number Publication Date
GB397719A true GB397719A (en) 1933-08-31

Family

ID=4514139

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32376/32A Expired GB397719A (en) 1931-11-16 1932-11-16 Improvements in electric lamps

Country Status (5)

Country Link
US (1) US1981329A (enrdf_load_stackoverflow)
BE (1) BE391856A (enrdf_load_stackoverflow)
FR (1) FR737856A (enrdf_load_stackoverflow)
GB (1) GB397719A (enrdf_load_stackoverflow)
NL (1) NL37556C (enrdf_load_stackoverflow)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2441823A (en) * 1943-02-01 1948-05-18 Westinghouse Electric Corp Reflector lamp and optical system
US2441824A (en) * 1943-10-16 1948-05-18 Westinghouse Electric Corp Reflector lamp
US2636143A (en) * 1949-05-21 1953-04-21 Percival H Mitchell Reflecting surface for incandescent lamps
IT500078A (enrdf_load_stackoverflow) * 1952-03-04
US2909693A (en) * 1954-02-10 1959-10-20 Cibie Pierre Headlamp, notably vehicle headlamp
US2820454A (en) * 1955-04-04 1958-01-21 Leonard W Wright Foot kneading rugs
US3256456A (en) * 1958-01-09 1966-06-14 Sylvania Electric Prod Reflector incandescent projection lamp
US2904714A (en) * 1958-06-16 1959-09-15 Gen Electric Electric lamp
USRE30832E (en) * 1976-08-30 1981-12-22 General Electric Company Ellipsoidal reflector lamp
US4041344A (en) * 1976-08-30 1977-08-09 General Electric Company Ellipsoidal reflector lamp
US4309746A (en) * 1978-09-14 1982-01-05 Martin Marietta Corporation Laser seeker target simulator
USD291921S (en) 1983-02-25 1987-09-15 Gte Products Corporation Lamp

Also Published As

Publication number Publication date
FR737856A (fr) 1932-12-17
NL37556C (enrdf_load_stackoverflow)
US1981329A (en) 1934-11-20
BE391856A (enrdf_load_stackoverflow)

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