FR42817E - Improvements to Incandescent Lamps of Optical Devices - Google Patents

Improvements to Incandescent Lamps of Optical Devices

Info

Publication number
FR42817E
FR42817E FR42817DA FR42817E FR 42817 E FR42817 E FR 42817E FR 42817D A FR42817D A FR 42817DA FR 42817 E FR42817 E FR 42817E
Authority
FR
France
Prior art keywords
optical devices
incandescent lamps
incandescent
lamps
optical
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
Other languages
French (fr)
Inventor
Alfred-Michel Monnier
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 filed Critical
Application granted granted Critical
Publication of FR42817E publication Critical patent/FR42817E/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
    • H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H01K1/30—Envelopes; Vessels incorporating lenses
FR42817D 1933-07-20 1932-12-15 Improvements to Incandescent Lamps of Optical Devices Expired FR42817E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR44156T 1933-07-20

Publications (1)

Publication Number Publication Date
FR42817E true FR42817E (en) 1933-11-04

Family

ID=8680011

Family Applications (5)

Application Number Title Priority Date Filing Date
FR703874D Expired FR703874A (en) 1933-07-20 1930-01-03 Improvements to Incandescent Lamps of Optical Devices
FR43077D Expired FR43077E (en) 1933-07-20 1932-11-03 Improvements to Incandescent Lamps of Optical Devices
FR43195D Expired FR43195E (en) 1933-07-20 1932-11-28 Improvements to Incandescent Lamps of Optical Devices
FR42817D Expired FR42817E (en) 1933-07-20 1932-12-15 Improvements to Incandescent Lamps of Optical Devices
FR44156D Expired FR44156E (en) 1933-07-20 1933-07-20 Improvements to Incandescent Lamps of Optical Devices

Family Applications Before (3)

Application Number Title Priority Date Filing Date
FR703874D Expired FR703874A (en) 1933-07-20 1930-01-03 Improvements to Incandescent Lamps of Optical Devices
FR43077D Expired FR43077E (en) 1933-07-20 1932-11-03 Improvements to Incandescent Lamps of Optical Devices
FR43195D Expired FR43195E (en) 1933-07-20 1932-11-28 Improvements to Incandescent Lamps of Optical Devices

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR44156D Expired FR44156E (en) 1933-07-20 1933-07-20 Improvements to Incandescent Lamps of Optical Devices

Country Status (3)

Country Link
BE (1) BE404010A (en)
FR (5) FR703874A (en)
GB (2) GB429424A (en)

Also Published As

Publication number Publication date
GB429424A (en) 1935-05-24
FR43195E (en) 1934-03-09
FR703874A (en) 1931-05-07
GB424467A (en) 1935-02-21
FR43077E (en) 1934-02-08
FR44156E (en) 1934-11-20
BE404010A (en)

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