FR669391A - Apparatus for recording the operation of electrical devices - Google Patents

Apparatus for recording the operation of electrical devices

Info

Publication number
FR669391A
FR669391A FR669391DA FR669391A FR 669391 A FR669391 A FR 669391A FR 669391D A FR669391D A FR 669391DA FR 669391 A FR669391 A FR 669391A
Authority
FR
France
Prior art keywords
recording
electrical devices
electrical
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)
Inventor
Henry Rose Cool
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 FR669391A publication Critical patent/FR669391A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C1/00—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people
    • G07C1/02—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people not involving the registering, indicating or recording of other data
    • G07C1/08—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people not involving the registering, indicating or recording of other data wherein the time is indicated by marking an element, e.g. a card or tape, in position determined by the time

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR669391D 1928-12-03 1929-02-08 Apparatus for recording the operation of electrical devices Expired FR669391A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US669391XA 1928-12-03 1928-12-03

Publications (1)

Publication Number Publication Date
FR669391A true FR669391A (en) 1929-11-15

Family

ID=1543441

Family Applications (1)

Application Number Title Priority Date Filing Date
FR669391D Expired FR669391A (en) 1928-12-03 1929-02-08 Apparatus for recording the operation of electrical devices

Country Status (1)

Country Link
FR (1) FR669391A (en)

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