GB302917A - Improvements in incandescent electric lamps - Google Patents

Improvements in incandescent electric lamps

Info

Publication number
GB302917A
GB302917A GB37540/28A GB3754028A GB302917A GB 302917 A GB302917 A GB 302917A GB 37540/28 A GB37540/28 A GB 37540/28A GB 3754028 A GB3754028 A GB 3754028A GB 302917 A GB302917 A GB 302917A
Authority
GB
United Kingdom
Prior art keywords
filament
reflector
bulb
reflectors
electric 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
GB37540/28A
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 GB302917A publication Critical patent/GB302917A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/26—Screens; Filters

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
GB37540/28A 1928-05-03 1928-12-19 Improvements in incandescent electric lamps Expired GB302917A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR668316X 1928-05-03
DE776603X 1934-07-16

Publications (1)

Publication Number Publication Date
GB302917A true GB302917A (en) 1929-10-31

Family

ID=31947524

Family Applications (2)

Application Number Title Priority Date Filing Date
GB37540/28A Expired GB302917A (en) 1928-05-03 1928-12-19 Improvements in incandescent electric lamps
GB13213/29A Expired GB310929A (en) 1928-05-03 1929-04-29 Improvements in incandescent electric lamps

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB13213/29A Expired GB310929A (en) 1928-05-03 1929-04-29 Improvements in incandescent electric lamps

Country Status (5)

Country Link
BE (2) BE352793A (es)
DE (1) DE548677C (es)
FR (3) FR659891A (es)
GB (2) GB302917A (es)
NL (2) NL42154C (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1012687B (de) * 1953-01-09 1957-07-25 Reinhold Koebke Elektrische Gluehlampe mit im Innern angeordnetem Glasreflektor
US4494377A (en) * 1983-08-12 1985-01-22 Yasuo Sato Brake booster operated also by solenoid

Also Published As

Publication number Publication date
FR659891A (fr) 1929-07-04
FR776603A (fr) 1935-01-30
NL24087C (es)
FR668316A (fr) 1929-10-30
BE352793A (es)
BE405305A (es) 1934-09-21
DE548677C (de) 1932-04-16
NL42154C (es) 1937-07-15
GB310929A (en) 1930-05-01

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