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- Bergmann & Company Electrical Switch, 1884 -
- 1884
- Collections - Artifact
Bergmann & Company Electrical Switch, 1884
- Motor -
- Collections - Artifact
Motor
- Miniature Generator, Displayed at the New York World's Fair, 1939 - Henry Ford firmly believed in the "practical educational value" of World's Fair exhibits. During the 1939-40 New York World's Fair, he highlighted the work of students attending his experimental schools. In a miniature machine shop in the Ford building, boys from Ford's Edison Institute Schools operated quarter-size replicas based on machines from Thomas Edison's Menlo Park.
- 1939
- Collections - Artifact
Miniature Generator, Displayed at the New York World's Fair, 1939
Henry Ford firmly believed in the "practical educational value" of World's Fair exhibits. During the 1939-40 New York World's Fair, he highlighted the work of students attending his experimental schools. In a miniature machine shop in the Ford building, boys from Ford's Edison Institute Schools operated quarter-size replicas based on machines from Thomas Edison's Menlo Park.
- 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.
- Emerson Series HH Meston Fan Motor, circa 1893 -
- circa 1893
- Collections - Artifact
Emerson Series HH Meston Fan Motor, circa 1893
- Queen & Company Resistance Unit, 1893-1912 -
- 1893-1912
- Collections - Artifact
Queen & Company Resistance Unit, 1893-1912
- General Electric Type IP-5 Prepayment Wattmeter, 1916-1926 -
- 1916-1926
- Collections - Artifact
General Electric Type IP-5 Prepayment Wattmeter, 1916-1926
- Fort Wayne Type K Wattmeter, circa 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. 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 1903
- Collections - Artifact
Fort Wayne Type K Wattmeter, circa 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. 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.
- Westinghouse Round Type Wattmeter, 1902 - 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.
- 1902
- Collections - Artifact
Westinghouse Round Type Wattmeter, 1902
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.
- Onondaga Voltmeter, 1893-1902 -
- 1893-1902
- Collections - Artifact
Onondaga Voltmeter, 1893-1902