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- Table Lamp, circa 1950 -
- circa 1950
- Collections - Artifact
Table Lamp, circa 1950
- Table Lamp, 1951 -
- 1951
- Collections - Artifact
Table Lamp, 1951
- "Akari Gemini" Lamp, circa 1950 -
- circa 1950
- Collections - Artifact
"Akari Gemini" Lamp, circa 1950
- 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.
- Key Socket - A light socket provides a secure connection between an incandescent electric lamp and the electrical circuit. In the late 19th century, companies created lamp bulb bases with unique styles and sizes which would only fit sockets that they made. By 1910 the Edison screw-type base had become so popular it was virtually an industry standard, and consumers no longer had to buy lamps and sockets from the same manufacturer.
- Collections - Artifact
Key Socket
A light socket provides a secure connection between an incandescent electric lamp and the electrical circuit. In the late 19th century, companies created lamp bulb bases with unique styles and sizes which would only fit sockets that they made. By 1910 the Edison screw-type base had become so popular it was virtually an industry standard, and consumers no longer had to buy lamps and sockets from the same manufacturer.
- Bayonet Socket, circa 1886 - A light socket provides a secure connection between an incandescent electric lamp and the electrical circuit. In the late 19th century, companies created lamp bulb bases with unique styles and sizes which would only fit sockets that they made. By 1910 the Edison screw-type base had become so popular it was virtually an industry standard, and consumers no longer had to buy lamps and sockets from the same manufacturer.
- Collections - Artifact
Bayonet Socket, circa 1886
A light socket provides a secure connection between an incandescent electric lamp and the electrical circuit. In the late 19th century, companies created lamp bulb bases with unique styles and sizes which would only fit sockets that they made. By 1910 the Edison screw-type base had become so popular it was virtually an industry standard, and consumers no longer had to buy lamps and sockets from the same manufacturer.
- Key Socket - A light socket provides a secure connection between an incandescent electric lamp and the electrical circuit. In the late 19th century, companies created lamp bulb bases with unique styles and sizes which would only fit sockets that they made. By 1910 the Edison screw-type base had become so popular it was virtually an industry standard, and consumers no longer had to buy lamps and sockets from the same manufacturer.
- Collections - Artifact
Key Socket
A light socket provides a secure connection between an incandescent electric lamp and the electrical circuit. In the late 19th century, companies created lamp bulb bases with unique styles and sizes which would only fit sockets that they made. By 1910 the Edison screw-type base had become so popular it was virtually an industry standard, and consumers no longer had to buy lamps and sockets from the same manufacturer.
- Cleveland Municipal Transit Token, 1908 - Operating and financing a streetcar business was complicated. This token from Cleveland dates from a turbulent period where a privately owned streetcar company was in the process of transferring its operations to the city, further complicated by a transit strike. For riders, the immediate effect of the merger agreement was an affordable 3-cent fare.
- 1908
- Collections - Artifact
Cleveland Municipal Transit Token, 1908
Operating and financing a streetcar business was complicated. This token from Cleveland dates from a turbulent period where a privately owned streetcar company was in the process of transferring its operations to the city, further complicated by a transit strike. For riders, the immediate effect of the merger agreement was an affordable 3-cent fare.
- Exhibit of Early Electrical Lighting at Columbia University, circa 1929 -
- circa 1929
- Collections - Artifact
Exhibit of Early Electrical Lighting at Columbia University, circa 1929
- Electric Knife Switch - Switches open or close an electrical circuit to turn things off or on. In the late 1800s and early 1900s, knife switches were commonly found in engine or generating rooms, connected to factory motors, or mounted on a building's power and lighting switchboard. Operators pushed the hinged, metal blades into the switch's jaws to send electricity to where it was needed.
- Collections - Artifact
Electric Knife Switch
Switches open or close an electrical circuit to turn things off or on. In the late 1800s and early 1900s, knife switches were commonly found in engine or generating rooms, connected to factory motors, or mounted on a building's power and lighting switchboard. Operators pushed the hinged, metal blades into the switch's jaws to send electricity to where it was needed.