Ammeter-voltmeter, Thomson
Object
- Accession Number
- OBJ_0028898
- Classification
- Energy-electric
- Creator / Manufacturer
- General Electric Co., General Electric
- Place
- United States of America
- Brand / Model
- Ammeter no. 500568 Type O/Voltmeter no. 526912 Type O
- Description
- Wood, metal, paper and glass
Case: heavily varnished oak; hinged lid; metal hardware. Interior lid has two labels and one plaque. Both gauges are metal with glass lens.
First gauge reads "THOMSON AMMETER/ NO. 500568 TYPE O/ GENERAL ELECTRIC CO., U.S.A./ PAT. JULY 18, '95 APR 2, 1901 JUNE 1 1909". Second gauge reads "THOMSON VOLTMETER/ NO. 526912 TYPE O/ GENERAL ELECTRIC CO., U.S.A./ PAT. JULY 16,'95 APR.2, 1901 JUNE 1, 1909". Plate, interior lid reads "ONTARIO CASE/ AND STORE FIXTURE CO./ TORONTO,". Incised print into wood, below plate reads "H. OESTREICH/ 20 WILLIAM ST/ WATERLOO". First label reads, interior lid reads "AMMETER/ TO MEASURE AMPERES FLOWING IN A / CIRCUIT CONNECT AMMETER TERMINALS/ DIRECTLY IN SERIES WITH CIRCUIT./ FULL SCALE OF AMMETER IS 5 AMPERES./ IF CURRENT, TO BE MEASURED, EXCEEDS/ THIS AMOUNT, A CURRENT TRANSFORMER/ OF SUITABLE RATIO MUST BE USED." Small print, bottom right corner reads "MAR. 5[/]19/ HCK[?]". Second label reads "VOLTMETER/ TO MEASURE VOLTAGES FROM 1 TO 150 VOLTS/ CONNECT LEFT HAND VOLTMETER TERMINAL AND/ TERMINAL MARKED 150 ACROSS THE LINE./ TO MEASURE VOLTAGES FROM 150 TO 300 VOLTS/ CONNECT LEFT HAND VOLTMETER TERMINAL AND/ TERMINAL MARKED 300 ACROSS THE LINE./ TO MEASURE VOLTAGES FROM 300 TO 750/ VOLTS CONNECT LEFT HAND, VOLTMETER TERMINAL/ AND TERMINAL MARKED 750 ACROSS THE LINE.". Small print, bottom right corner reads "MAR. 5[/]19/ HCK[?]".
Missing a piece of wood on the left side of lid and another on the bottom right side. - Description
- Wood, metal, paper and glass
Case: heavily varnished oak; hinged lid; metal hardware. Interior lid has two labels and one plaque. Both gauges are metal with glass lens.
First gauge reads "THOMSON AMMETER/ NO. 500568 TYPE O/ GENERAL ELECTRIC CO., U.S.A./ PAT. JULY 18, '95 APR 2, 1901 JUNE 1 1909". Second gauge reads "THOMSON VOLTMETER/ NO. 526912 TYPE O/ GENERAL ELECTRIC CO., U.S.A./ PAT. JULY 16,'95 APR.2, 1901 JUNE 1, 1909". Plate, interior lid reads "ONTARIO CASE/ AND STORE FIXTURE CO./ TORONTO,". Incised print into wood, below plate reads "H. OESTREICH/ 20 WILLIAM ST/ WATERLOO". First label reads, interior lid reads "AMMETER/ TO MEASURE AMPERES FLOWING IN A / CIRCUIT CONNECT AMMETER TERMINALS/ DIRECTLY IN SERIES WITH CIRCUIT./ FULL SCALE OF AMMETER IS 5 AMPERES./ IF CURRENT, TO BE MEASURED, EXCEEDS/ THIS AMOUNT, A CURRENT TRANSFORMER/ OF SUITABLE RATIO MUST BE USED." Small print, bottom right corner reads "MAR. 5[/]19/ HCK[?]". Second label reads "VOLTMETER/ TO MEASURE VOLTAGES FROM 1 TO 150 VOLTS/ CONNECT LEFT HAND VOLTMETER TERMINAL AND/ TERMINAL MARKED 150 ACROSS THE LINE./ TO MEASURE VOLTAGES FROM 150 TO 300 VOLTS/ CONNECT LEFT HAND VOLTMETER TERMINAL AND/ TERMINAL MARKED 300 ACROSS THE LINE./ TO MEASURE VOLTAGES FROM 300 TO 750/ VOLTS CONNECT LEFT HAND, VOLTMETER TERMINAL/ AND TERMINAL MARKED 750 ACROSS THE LINE.". Small print, bottom right corner reads "MAR. 5[/]19/ HCK[?]".
Missing a piece of wood on the left side of lid and another on the bottom right side. - History of Use
- Case is comprised of two gauges: ammeter is used to measure the electric current in amperes and the voltmeter measures voltage (electrical potential).
- See Elsewhere
- ingenium.ca
- Record Rights
- © Ingenium
- http://creativecommons.org/licenses/by-nc/4.0/
From The Collection Of
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