FR37831E - Improvements made to vacuum devices, and more particularly to switches - Google Patents

Improvements made to vacuum devices, and more particularly to switches

Info

Publication number
FR37831E
FR37831E FR37831DA FR37831E FR 37831 E FR37831 E FR 37831E FR 37831D A FR37831D A FR 37831DA FR 37831 E FR37831 E FR 37831E
Authority
FR
France
Prior art keywords
switches
improvements made
vacuum devices
vacuum
devices
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 Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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
Priority claimed from US264115A external-priority patent/US1892538A/en
Priority claimed from US264116A external-priority patent/US1865274A/en
Priority claimed from US264114A external-priority patent/US1814851A/en
Priority claimed from US264210A external-priority patent/US1821813A/en
Priority claimed from US279154A external-priority patent/US1731866A/en
Priority claimed from US285412A external-priority patent/US1792340A/en
Application filed by Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR37831E publication Critical patent/FR37831E/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/42—Measurement or testing during manufacture
FR37831D 1928-03-23 1929-05-17 Improvements made to vacuum devices, and more particularly to switches Expired FR37831E (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US264115A US1892538A (en) 1928-03-23 1928-03-23 Vacuum switch
US264116A US1865274A (en) 1928-03-23 1928-03-23 Circuit interrupter
US264114A US1814851A (en) 1928-03-23 1928-03-23 Circuit controlling apparatus
US264210A US1821813A (en) 1928-03-23 1928-03-23 Circuit making and breaking device
US279154A US1731866A (en) 1928-05-19 1928-05-19 Circuit-controlling system
US285412A US1792340A (en) 1928-06-14 1928-06-14 Circuit interrupter
US28809428A 1928-06-25 1928-06-25
US314352XA 1928-06-25 1928-06-25

Publications (1)

Publication Number Publication Date
FR37831E true FR37831E (en) 1931-01-24

Family

ID=31950982

Family Applications (1)

Application Number Title Priority Date Filing Date
FR37831D Expired FR37831E (en) 1928-03-23 1929-05-17 Improvements made to vacuum devices, and more particularly to switches

Country Status (1)

Country Link
FR (1) FR37831E (en)

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