Ammeter
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1992.2806.001
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- OBJECT TYPE
- N/A
- DATE
- 1880–1900
- ARTIFACT NUMBER
- 1992.2806.001
- MANUFACTURER
- General Electric Co.
- MODEL
- Unknown
- LOCATION
- Unknown
More Information
General Information
- Serial #
- 4208
- Part Number
- 1
- Total Parts
- 1
- AKA
- N/A
- Patents
- N/A
- General Description
- Wood base/ Working pieces are made of metal (copper, steel, and brass).
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 26.0 cm
- Width
- 23.0 cm
- Height
- 12.5 cm
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Energy-electric
- Category
- Measurement
- Sub-Category
- N/A
Manufacturer
- AKA
- General Electric
- Country
- Unknown
- State/Province
- Unknown
- City
- Unknown
Context
- Country
- Unknown
- State/Province
- Unknown
- Period
- Unknown
- Canada
-
Very early switchboard ammeter. Possibly made by Canadian General Electric Company. - Function
-
To measure current. - Technical
-
Early Thomson-Houston instruments used with complete switchboard set-up. As their name implies the meter is an "indicator" of amperes in the circuit but accurate enough for the purpose intended: this type of ammeter was connected directly into a circuit of 2,200 volts without the use of an insulating current transformer; the meter was part of the a complete Thomson-Houston system including alternator switchboard, with control system and transformers; a frequency of 125 cycles was used at the time, late 1880s and early 1890s. - Area Notes
-
Unknown
Details
- Markings
- Mfr. plate reads: "CURRENT INDICATOR/ NO. 4208/ CAPACITY 40 AMPERES/ PATENTED OCT. 22, 1889./ GENERAL ELECTRIC CO./ THOMSON-HOUSTON SYSTEM" Obverse side of attached 'provenance' tag reads: "Ammeter/ MD 31-17/ from: G.C. Allen, Sarnia, Ontario/ #184/ mfr'd by: Canadian General Electric Company/ gift of: [space left blank]/ current indicator (ammeter); Thomson-Houston sy???m [probably 'system']/ #4208; reads 0-40 amp; General Electric Company;/ patented October 22, 1889; contained in wood case and/ arranged for mounting on a switchboard; as their name/ implies the meter is an "indicator" of amperes in the/circuit but accurate enough for the purpose intended; this/ type of ammeter was connected directly into a circuit of" Reverse side of attached 'provenance' tag reads: "2,200 volts without the use of an insulating current/ transformer; the meter was part of a complete/ Thomson-Houston system including alternator/ switchboard, with control system and transformers;/ a frequency of 125 cycles was used at the time, late 1880's and early 1890's." Marking scratched into back of ammeter reads: "125 Cycles"
- Missing
- N/A
- Finish
- Unknown
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
General Electric Co., Ammeter, between 1880–1900, Artifact no. 1992.2806, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/id/1992.2806.001/
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