Chadburn's Turbine and Telegraph Tell-Tale
Chadburn Turbine and Telegraph Tell-Tale was an electrical data system.
It would be used in pairs of unidirectional transmitter/receiver networks to achieve the bidirectional purpose of transmitting the desired Ahead/Stop/Astern state of the turbine from lower conning tower to the engine room, and send back the state of the turbine.[2]
Contents
Instruments
At the telegraph end were two dials had sectors for "Ahead", "Stop" and "Astern". The dial on the right had a red pointer and provided positive electrical indication of the position of the telegraph, as monitored by a switch integral to the telegraph device. The dial on the left with a black pointer indicated the state of the turbine in the engine room.
A similar version of the dial pair was made for use on the compass platform, putting two concentric pointers on one dial face, with the black pointer being the same size and atop the red pointer. In this way, the red pointer would only be visible when a new order had not yet been matched by the turbine.
At the turbine end, the turbine itself was wired up with a transmitter which would send "Stop" (denoted by an open circuit) when the turbine were at lower than 10% maximum revolutions, and otherwise "Ahead" or "Astern" depending on its direction. A nearby lamp would indicate when the circuit was active (not sending "Stop"). The turbine also had a single dial with a black pointer indicating just as the black pointer dial at the telegraph end did: the turbine's indicated state.
There is no clear indication given as to how the turbine end sees the direction being commanded by the telegraph. Perhaps that is mechanically set by the telegraph.
See Also
Footnotes
- ↑ Annual Report of the Torpedo School, 1915, Plate 124.
- ↑ Annual Report of the Torpedo School, 1915, pp. 249-250, Plate 124.
Bibliography
