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- General Electric Thomson Recording Wattmeter, circa 1903 - Elihu Thomson, engineer, inventor and cofounder of the Thomson-Houston Electric Company, developed a commutator-type wattmeter in the late 1880s. His recording watt-hour meter helped transform the nascent electric power industry. The sturdy device provided companies that supplied electricity to consumers a way to accurately track and bill electrical power use.
- circa 1903
- Collections - Artifact
General Electric Thomson Recording Wattmeter, circa 1903
Elihu Thomson, engineer, inventor and cofounder of the Thomson-Houston Electric Company, developed a commutator-type wattmeter in the late 1880s. His recording watt-hour meter helped transform the nascent electric power industry. The sturdy device provided companies that supplied electricity to consumers a way to accurately track and bill electrical power use.
- Westinghouse Type C Switchboard Wattmeter, 1906-1911 -
- 1906-1911
- Collections - Artifact
Westinghouse Type C Switchboard Wattmeter, 1906-1911
- Sangamo Electric Company Gutmann Type A Wattmeter, 1899-1901 - In the late 1800s, companies that supplied electricity to consumers needed a way to measure how much customers used -- and then charge them accordingly. Ludwig Gutmann, one of several inventive electrical engineers who designed meters to calculate power usage, developed this induction-type wattmeter. U.S. production of this meter stopped after courts ruled that it infringed on existing patents held by Westinghouse.
- 1899-1901
- Collections - Artifact
Sangamo Electric Company Gutmann Type A Wattmeter, 1899-1901
In the late 1800s, companies that supplied electricity to consumers needed a way to measure how much customers used -- and then charge them accordingly. Ludwig Gutmann, one of several inventive electrical engineers who designed meters to calculate power usage, developed this induction-type wattmeter. U.S. production of this meter stopped after courts ruled that it infringed on existing patents held by Westinghouse.
- Fort Wayne Type K Wattmeter, 1901-1908 - In the late 1800s, companies that supplied electricity to consumers needed a way to measure how much customers used -- and then charge them accordingly. Inventive electrical engineers developed various methods to measure electric power. Induction meters that employed magnetic fields to rotate a disc or cylinder to register energy usage would become the standard. Continued improvements made these wattmeters more compact and reliable.
- 1901-1908
- Collections - Artifact
Fort Wayne Type K Wattmeter, 1901-1908
In the late 1800s, companies that supplied electricity to consumers needed a way to measure how much customers used -- and then charge them accordingly. Inventive electrical engineers developed various methods to measure electric power. Induction meters that employed magnetic fields to rotate a disc or cylinder to register energy usage would become the standard. Continued improvements made these wattmeters more compact and reliable.
- Stanley Wattmeter, 1890-1895 -
- 1890-1895
- Collections - Artifact
Stanley Wattmeter, 1890-1895
- Westinghouse Type A Wattmeter, 1903-1904 - In the late 1800s, companies that supplied electricity to consumers needed a way to measure how much customers used -- and then charge them accordingly. Inventive electrical engineers developed various methods to measure electric power. Induction meters that employed magnetic fields to rotate a disc or cylinder to register energy usage would become the standard. Continued improvements made these wattmeters more compact and reliable.
- 1903-1904
- Collections - Artifact
Westinghouse Type A Wattmeter, 1903-1904
In the late 1800s, companies that supplied electricity to consumers needed a way to measure how much customers used -- and then charge them accordingly. Inventive electrical engineers developed various methods to measure electric power. Induction meters that employed magnetic fields to rotate a disc or cylinder to register energy usage would become the standard. Continued improvements made these wattmeters more compact and reliable.
- Sangamo Electric Company D-5 Wattmeter, circa 1914 - In the late 1800s, companies that supplied electricity to consumers needed a way to measure how much customers used--and then charge them accordingly. Induction-type wattmeters proved reliable and would become the industry standard, but until 1910 Westinghouse held the patents. Sangamo Electric Company, which had not been granted a patent license, produced a mercury-motor alternative. This version was made well in the 20th century.
- circa 1914
- Collections - Artifact
Sangamo Electric Company D-5 Wattmeter, circa 1914
In the late 1800s, companies that supplied electricity to consumers needed a way to measure how much customers used--and then charge them accordingly. Induction-type wattmeters proved reliable and would become the industry standard, but until 1910 Westinghouse held the patents. Sangamo Electric Company, which had not been granted a patent license, produced a mercury-motor alternative. This version was made well in the 20th century.
- Sangamo Electric Company Gutmann Type B Wattmeter, 1901-1903 - In the late 1800s, companies that supplied electricity to consumers needed a way to measure how much customers used -- and then charge them accordingly. Ludwig Gutmann, one of several inventive electrical engineers who designed meters to calculate power usage, developed this induction-type wattmeter for Sangamo Electric Company. U.S. production of this meter stopped after courts ruled that it infringed on existing patents held by Westinghouse.
- 1901-1903
- Collections - Artifact
Sangamo Electric Company Gutmann Type B Wattmeter, 1901-1903
In the late 1800s, companies that supplied electricity to consumers needed a way to measure how much customers used -- and then charge them accordingly. Ludwig Gutmann, one of several inventive electrical engineers who designed meters to calculate power usage, developed this induction-type wattmeter for Sangamo Electric Company. U.S. production of this meter stopped after courts ruled that it infringed on existing patents held by Westinghouse.
- Fort Wayne Duncan Wattmeter, 1896-1899 - In the late 1800s, companies that supplied electricity to consumers needed a way to measure how much customers used--and then charge them accordingly. Thomas Duncan developed wattmeters for several companies before starting his own meter manufacturing business in 1901. This induction-type wattmeter was developed for the Fort Wayne Electric Works in the late 1890s.
- 1896-1899
- Collections - Artifact
Fort Wayne Duncan Wattmeter, 1896-1899
In the late 1800s, companies that supplied electricity to consumers needed a way to measure how much customers used--and then charge them accordingly. Thomas Duncan developed wattmeters for several companies before starting his own meter manufacturing business in 1901. This induction-type wattmeter was developed for the Fort Wayne Electric Works in the late 1890s.
- Fort Wayne Type W Wattmeter, circa 1905 - In the late 1800s, companies that supplied electricity to consumers needed a way to measure how much customers used -- and then charge them accordingly. Inventive electrical engineers developed various methods to measure electric power. Induction meters that employed magnetic fields to rotate a disc or cylinder to register energy usage would become the standard. Continued improvements made these wattmeters more compact and reliable.
- circa 1905
- Collections - Artifact
Fort Wayne Type W Wattmeter, circa 1905
In the late 1800s, companies that supplied electricity to consumers needed a way to measure how much customers used -- and then charge them accordingly. Inventive electrical engineers developed various methods to measure electric power. Induction meters that employed magnetic fields to rotate a disc or cylinder to register energy usage would become the standard. Continued improvements made these wattmeters more compact and reliable.