FR675671A - Improvements to incandescent electric lamps - Google Patents

Improvements to incandescent electric lamps

Info

Publication number
FR675671A
FR675671A FR675671DA FR675671A FR 675671 A FR675671 A FR 675671A FR 675671D A FR675671D A FR 675671DA FR 675671 A FR675671 A FR 675671A
Authority
FR
France
Prior art keywords
electric lamps
incandescent electric
incandescent
lamps
electric
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)
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.)
Compagnie des Lampes
Original Assignee
Compagnie des Lampes
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 Compagnie des Lampes filed Critical Compagnie des Lampes
Application granted granted Critical
Publication of FR675671A publication Critical patent/FR675671A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/52—Means for obtaining or maintaining the desired pressure within the vessel
    • H01K1/54—Means for absorbing or absorbing gas, or for preventing or removing efflorescence, e.g. by gettering
FR675671D 1928-05-28 1929-05-24 Improvements to incandescent electric lamps Expired FR675671A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US312613XA 1928-05-28 1928-05-28

Publications (1)

Publication Number Publication Date
FR675671A true FR675671A (en) 1930-02-13

Family

ID=21858475

Family Applications (1)

Application Number Title Priority Date Filing Date
FR675671D Expired FR675671A (en) 1928-05-28 1929-05-24 Improvements to incandescent electric lamps

Country Status (2)

Country Link
FR (1) FR675671A (en)
GB (1) GB312613A (en)

Also Published As

Publication number Publication date
GB312613A (en) 1930-08-07

Similar Documents

Publication Publication Date Title
FR630354A (en) Improvements to incandescent electric lamps
FR687021A (en) Incandescent electric lamp
FR677066A (en) Improvements to incandescent electric lamps
FR623708A (en) Incandescent electric lamps
FR626027A (en) Improvements to incandescent electric lamps
FR624050A (en) Improvements to incandescent electric lamps
FR702874A (en) Incandescent lamp improvements
FR621135A (en) Improvements to incandescent electric lamps
FR660796A (en) Improvement in incandescent lamps
FR616189A (en) Improvements to incandescent electric lamps
FR666475A (en) Improvements to incandescent electric lamps
FR676233A (en) Improvements to incandescent electric lamps
FR675671A (en) Improvements to incandescent electric lamps
FR705272A (en) Improvements to incandescent electric lamps or discharge tubes
FR631452A (en) Improvements to incandescent electric lamps
FR628329A (en) Improvements to incandescent electric lamps
FR676337A (en) Incandescent electric lamps
FR688252A (en) Incandescent lamp improvements
FR665272A (en) Improvements to incandescent electric lamps and their supports
FR677622A (en) Improvements to projectors including incandescent electric lamps
FR663300A (en) Improvements to incandescent electric lamps
FR648455A (en) Improvements to projectors including incandescent electric lamps
FR747957A (en) Improvements to incandescent electric lamps
FR680315A (en) Improvements to Incandescent Electric Lamps Incorporating Multiple Filaments
FR712539A (en) Improvements to incandescent electric lamps