ALEXANDER MUIRHEAD Cable duplex & relay. INSTRUMENTS. MESSAGE SIPHON RECORD 1907
£9
SKU
'DR. ALEXANDER MUIRHEAD. Inventor of the cable duplex, and his remarkable cable relay A GENERAL VIEW of A SET of MODERN CABLE INSTRUMENTS. On right is tape perforator. In middle is automatic transmitter., and on left is a siphon recorder for receiving the message at the other end of the line. One or two thousand miles of cable are supposed to intervene between this instrument and the transmitter. THREE SPECIMENS of A SIPHON RECORD of A MESSAGE AS RECEIVED OVER A LONG OCEAN CABLE. The first is an old-time record. The second is a modern record like those of messages across the Atlantic. The third is the latest style of squared-up record, received over the same cable. The remarkable increase in definiteness and uniformity is obvious. It is this latest achievement in cable signaling that has made cable relays possible.'
Size 24 x 17 cm | 9.5 x 6.5 inches
Date Published: 1907
Type: Antique book illustration
Author: Scientific American
Publication: The Americana
Condition: Good |
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