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- 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.
- Telephone Switchboard Drop Signal, 1900-1925 - Before long-distance direct dialing became widespread in the 1960s, switchboards connected calls. When a caller picked up the phone, drop signals would indicate to an operator that someone was on the line. The operator would ask them for the number they would like to connect to and then manually connect the caller's line to the recipient.
- 1900-1925
- Collections - Artifact
Telephone Switchboard Drop Signal, 1900-1925
Before long-distance direct dialing became widespread in the 1960s, switchboards connected calls. When a caller picked up the phone, drop signals would indicate to an operator that someone was on the line. The operator would ask them for the number they would like to connect to and then manually connect the caller's line to the recipient.
- American Electric Company Switchboard, 1880-1920 -
- 1880-1920
- Collections - Artifact
American Electric Company Switchboard, 1880-1920
- Switchboard Plug, 1894 -
- 1894
- Collections - Artifact
Switchboard Plug, 1894
- Telegraph Switchboard -
- Collections - Artifact
Telegraph Switchboard
- Western Electric Telephone Switchboard, Used by the Michigan Bell Telephone Company, circa 1930 - Before long-distance direct dialing became widespread in the 1960s, callers relied on switchboards to connect calls. When a caller picked up the phone, a switchboard operator on the line would ask them for the number they would like to connect to. The operator would put the call through by manually connecting the caller's line to the appropriate recipient via the switchboard.
- circa 1930
- Collections - Artifact
Western Electric Telephone Switchboard, Used by the Michigan Bell Telephone Company, circa 1930
Before long-distance direct dialing became widespread in the 1960s, callers relied on switchboards to connect calls. When a caller picked up the phone, a switchboard operator on the line would ask them for the number they would like to connect to. The operator would put the call through by manually connecting the caller's line to the appropriate recipient via the switchboard.
- Telephone Switchboard Drop Signal, 1900-1925 - Before long-distance direct dialing became widespread in the 1960s, switchboards connected calls. When a caller picked up the phone, drop signals would indicate to an operator that someone was on the line. The operator would ask them for the number they would like to connect to and then manually connect the caller's line to the recipient.
- 1900-1925
- Collections - Artifact
Telephone Switchboard Drop Signal, 1900-1925
Before long-distance direct dialing became widespread in the 1960s, switchboards connected calls. When a caller picked up the phone, drop signals would indicate to an operator that someone was on the line. The operator would ask them for the number they would like to connect to and then manually connect the caller's line to the recipient.
- Telephone Switchboard in Administration Building at Ford Motor Company Rouge Plant, October 1947 -
- October 27, 1947
- Collections - Artifact
Telephone Switchboard in Administration Building at Ford Motor Company Rouge Plant, October 1947
- The Electrical Switchboard in the Ford Motor Company Highland Park Powerhouse, circa 1913 - Ford Motor Company opened its Highland Park plant in 1910. It was here that Ford produced most of its 15 million Model T cars, developed its moving assembly line, and instituted its Five Dollar Day. The plant's electricity was supplied by an on-site powerhouse with generators connected to nine gas-steam hybrid engines. Together, the nine engines produced 53,000 horsepower.
- circa 1913
- Collections - Artifact
The Electrical Switchboard in the Ford Motor Company Highland Park Powerhouse, circa 1913
Ford Motor Company opened its Highland Park plant in 1910. It was here that Ford produced most of its 15 million Model T cars, developed its moving assembly line, and instituted its Five Dollar Day. The plant's electricity was supplied by an on-site powerhouse with generators connected to nine gas-steam hybrid engines. Together, the nine engines produced 53,000 horsepower.
- "Copy of Report of the Board of Trustees, Eastern Michigan Asylum, Pontiac, Mich., Electric Lighting Plant," 1898 -
- June 30, 1898
- Collections - Artifact
"Copy of Report of the Board of Trustees, Eastern Michigan Asylum, Pontiac, Mich., Electric Lighting Plant," 1898