FR491986A - Perfectionnements aux projecteurs d'exploration - Google Patents

Perfectionnements aux projecteurs d'exploration

Info

Publication number
FR491986A
FR491986A FR491986DA FR491986A FR 491986 A FR491986 A FR 491986A FR 491986D A FR491986D A FR 491986DA FR 491986 A FR491986 A FR 491986A
Authority
FR
France
Prior art keywords
projectors
exploration
exploration projectors
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
English (en)
Inventor
Elmer Ambrose Sperry
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
Application granted granted Critical
Publication of FR491986A publication Critical patent/FR491986A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B31/00—Electric arc lamps
    • H05B31/003—Electric arc lamps of a special type
    • H05B31/0039—Projectors, the construction of which depends upon the presence of the arc
FR491986D 1915-09-10 1916-06-28 Perfectionnements aux projecteurs d'exploration Expired FR491986A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB491986X 1915-09-10

Publications (1)

Publication Number Publication Date
FR491986A true FR491986A (fr) 1919-06-24

Family

ID=1527919

Family Applications (1)

Application Number Title Priority Date Filing Date
FR491986D Expired FR491986A (fr) 1915-09-10 1916-06-28 Perfectionnements aux projecteurs d'exploration

Country Status (1)

Country Link
FR (1) FR491986A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1288811B (de) * 1958-09-20 1969-02-06 Bosch Elektronik Photokino Entlueftungseinrichtung fuer eine Bildwurflampe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1288811B (de) * 1958-09-20 1969-02-06 Bosch Elektronik Photokino Entlueftungseinrichtung fuer eine Bildwurflampe

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