An old engraving of a Victorian ‘alarm’ dial-telegraph station. It is from a mechanical engineering book of the 1880s. This electro-magnetic device is powered by the foot treadle. This machine would be connected to similar machines within a building or compound. With the dial’s needle in the vertical position it is receive mode. Any incoming message received shows on the upper, viewing dial. This could indicate messages such as ‘fire’, ‘thieves’, ‘door not locked’ or similar. The main dial can be turned to various set positions to transmit similar signals.
An old engraving of a Victorian ‘alarm’ dial-telegraph station. It is from a mechanical engineering book of the 1880s. This electro-magnetic device is powered by the foot treadle. This machine would be connected to similar machines within a building or compound. With the dial’s needle in the vertical position it is receive mode. Any incoming message received shows on the upper, viewing dial. This could indicate messages such as ‘fire’, ‘thieves’, ‘door not locked’ or similar. The main dial can be turned to various set positions to transmit similar signals.
Size: 2642px × 3071px
Location: USA
Photo credit: © M&N / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 1800s, 19th, alarm, alert, apparatus, black, century, communicate, communication, communications, design, device, dial, early, electric, electrical, engineering, engraving, foot, historical, history, hundreds, illustration, industrial, industry, machine, magnetic, mechanical, message, nineteenth, power, receive, receiver, reproduce, revolution, stand, station, synchronous, system, telegraph, telegraphic, transmit, transmitter, treadle, typewheel, victorian, white, wire, wired
