GB291372A - Improvements in incandescent electric lamps having means for giving different degrees of luminous intensity - Google Patents

Improvements in incandescent electric lamps having means for giving different degrees of luminous intensity

Info

Publication number
GB291372A
GB291372A GB11573/28A GB1157328A GB291372A GB 291372 A GB291372 A GB 291372A GB 11573/28 A GB11573/28 A GB 11573/28A GB 1157328 A GB1157328 A GB 1157328A GB 291372 A GB291372 A GB 291372A
Authority
GB
United Kingdom
Prior art keywords
cap
contacts
filaments
luminous intensity
different degrees
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
GB11573/28A
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 GB291372A publication Critical patent/GB291372A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K9/00—Lamps having two or more incandescent bodies separately heated
    • H01K9/02—Lamps having two or more incandescent bodies separately heated to provide substitution in the event of failure of one of the bodies
    • H01K9/04—Lamps having two or more incandescent bodies separately heated to provide substitution in the event of failure of one of the bodies with built-in manually operated switch

Landscapes

  • Tumbler Switches (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
GB11573/28A 1928-03-31 1928-04-19 Improvements in incandescent electric lamps having means for giving different degrees of luminous intensity Expired GB291372A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR35142T 1928-03-31

Publications (1)

Publication Number Publication Date
GB291372A true GB291372A (en) 1929-01-10

Family

ID=8672058

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11573/28A Expired GB291372A (en) 1928-03-31 1928-04-19 Improvements in incandescent electric lamps having means for giving different degrees of luminous intensity

Country Status (4)

Country Link
CH (1) CH143844A (nl)
FR (2) FR648165A (nl)
GB (1) GB291372A (nl)
NL (1) NL23840C (nl)

Also Published As

Publication number Publication date
FR35142E (fr) 1929-12-03
FR648165A (fr) 1928-12-06
CH143844A (fr) 1930-11-30
NL23840C (nl)

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