Keyword: "switchboard"

A chronograph and switch-board.

An Edison fuse plug and casing for switchboard use.

Fuse protection for voltmeter and ground detector on a direct-current switchboard. Fuse protection on…

"Fuse protection on instrument circuit of an alternating-current switchboard." —Croft 1920

"Edison fuse plugs and casings for switchboard use." —Croft 1920

"Illustrating fuse protection for voltmeter and ground detector and ground detector on a direct-current…

"Edison fuse plug cutout for switchboard use." —Croft 1920

Instrument post used instead of a panel switchboard.

Rear elevation of the switchboard with the perspective and front views.

A small "standard-unit" switchboard for two compound-wound direct-current generators and seven feeders.

Front view of a switchboard panel for a single compound-wound direct-current generator.

Unit switchboard panels for 600-volt, direct-current, railway service.

A picture of a railway switchboard that handles 500-volt direct currents. The switchboard consists of…

Perspective view of the typical 2400-volt, three-phase switchboard for power and lighting service in…

An automatic voltage regulator for small capacity exciters mounted on a 31 inch panel for insertion…

Clipart tagged: ‘switchboard’