FR659137A - Improvements to ammeters - Google Patents

Improvements to ammeters

Info

Publication number
FR659137A
FR659137A FR659137DA FR659137A FR 659137 A FR659137 A FR 659137A FR 659137D A FR659137D A FR 659137DA FR 659137 A FR659137 A FR 659137A
Authority
FR
France
Prior art keywords
ammeters
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.)
AC SPARK PLUG CO
Original Assignee
AC SPARK PLUG CO
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 to US214159A priority Critical patent/US1761908A/en
Application filed by AC SPARK PLUG CO filed Critical AC SPARK PLUG CO
Application granted granted Critical
Publication of FR659137A publication Critical patent/FR659137A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/14Indicating direction of current; Indicating polarity of voltage
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R5/00Instruments for converting a single current or a single voltage into a mechanical displacement
    • G01R5/14Moving-iron instruments
FR659137D 1927-08-19 1928-08-18 Improvements to ammeters Expired FR659137A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US214159A US1761908A (en) 1927-08-19 1927-08-19 Ammeter

Publications (1)

Publication Number Publication Date
FR659137A true FR659137A (en) 1929-06-25

Family

ID=22797993

Family Applications (1)

Application Number Title Priority Date Filing Date
FR659137D Expired FR659137A (en) 1927-08-19 1928-08-18 Improvements to ammeters

Country Status (4)

Country Link
US (1) US1761908A (en)
DE (1) DE536173C (en)
FR (1) FR659137A (en)
GB (1) GB295714A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2460686A (en) * 1944-01-04 1949-02-01 Edison Inc Thomas A Electrical instrument
US2446431A (en) * 1945-01-29 1948-08-03 Paul Mood Electrical measuring instrument
US2926303A (en) * 1956-02-20 1960-02-23 Jesse D Staggs Engine-speed indicating system

Also Published As

Publication number Publication date
US1761908A (en) 1930-06-03
DE536173C (en) 1931-10-20
GB295714A (en) 1929-11-04

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