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- General Electric Foot-Candle Meter, circa 1925 -
- circa 1925
- Collections - Artifact
General Electric Foot-Candle Meter, circa 1925
- Pontiac State Hospital Dynamo Room, Pontiac, Michigan, 1898 - In 1898, a modern electric light and power plant was completed at the Eastern Michigan Asylum in Pontiac. Inside, dynamos, motors, machines, and a range of switches and meters helped power the institution's growing infrastructure. This photograph shows the interior of the dynamo room. Hospital administrators funded a new power plant in 1929.
- 1898
- Collections - Artifact
Pontiac State Hospital Dynamo Room, Pontiac, Michigan, 1898
In 1898, a modern electric light and power plant was completed at the Eastern Michigan Asylum in Pontiac. Inside, dynamos, motors, machines, and a range of switches and meters helped power the institution's growing infrastructure. This photograph shows the interior of the dynamo room. Hospital administrators funded a new power plant in 1929.
- 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.
- Columbia Meter Company Type D Wattmeter, 1910-1920 - 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 and several companies began production of recording wattmeters. The Indiana-based Columbia Meter Company produced wattmeters during the first decades of the twentieth century before the company folded.
- 1910-1920
- Collections - Artifact
Columbia Meter Company Type D Wattmeter, 1910-1920
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 and several companies began production of recording wattmeters. The Indiana-based Columbia Meter Company produced wattmeters during the first decades of the twentieth century before the company folded.
- Eickemeyer Dynamo, Used by the Haxton Canning Company, 1889 - Rudolf Eickemeyer developed his "ironclad" dynamo in the 1880s. The unique method of construction--its heavy iron field coil construction and iron sheathing--gave the dynamo its nickname. It was compact, rugged and efficient, though the ironclad design made it difficult to cool. This dynamo supplied power for the lighting system and small motors at the Haxton Canning Company in Oakfield, New York, for 15 years.
- 1889
- Collections - Artifact
Eickemeyer Dynamo, Used by the Haxton Canning Company, 1889
Rudolf Eickemeyer developed his "ironclad" dynamo in the 1880s. The unique method of construction--its heavy iron field coil construction and iron sheathing--gave the dynamo its nickname. It was compact, rugged and efficient, though the ironclad design made it difficult to cool. This dynamo supplied power for the lighting system and small motors at the Haxton Canning Company in Oakfield, New York, for 15 years.
- 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.
- Thomson-Houston Recording Wattmeter, 1889-1892 - 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.
- 1889-1892
- Collections - Artifact
Thomson-Houston Recording Wattmeter, 1889-1892
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.
- Weston Model 156 Voltmeter, circa 1914 -
- circa 1914
- Collections - Artifact
Weston Model 156 Voltmeter, circa 1914
- Westinghouse Type TL Ammeter, circa 1911 - In the late 1800s and early 1900s, companies that supplied electricity to consumers needed a variety of instruments to regulate and monitor electrical output. These instruments were vital to the operation of power stations and needed to be accurate and rugged. Ammeters--used to measure the current in a circuit--could be found on switchboards or connected to motors and generators.
- circa 1911
- Collections - Artifact
Westinghouse Type TL Ammeter, circa 1911
In the late 1800s and early 1900s, companies that supplied electricity to consumers needed a variety of instruments to regulate and monitor electrical output. These instruments were vital to the operation of power stations and needed to be accurate and rugged. Ammeters--used to measure the current in a circuit--could be found on switchboards or connected to motors and generators.
- Reliance Instrument Company Type B Ammeter, circa 1911 - In the late 1800s and early 1900s, companies that supplied electricity to consumers needed a variety of instruments to regulate and monitor electrical output. These instruments were vital to the operation of power stations and needed to be accurate and rugged. Ammeters--used to measure the current in a circuit--could be found on switchboards or connected to motors and generators.
- circa 1911
- Collections - Artifact
Reliance Instrument Company Type B Ammeter, circa 1911
In the late 1800s and early 1900s, companies that supplied electricity to consumers needed a variety of instruments to regulate and monitor electrical output. These instruments were vital to the operation of power stations and needed to be accurate and rugged. Ammeters--used to measure the current in a circuit--could be found on switchboards or connected to motors and generators.