Photograph from the collection of Dr J W F Scrimgeour
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THE SIGNAL BOX |
OVERSEAS |
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Photograph from the collection of Dr J W F Scrimgeour |
Salt River Junction, in Cape Town, was controlled from a hydraulic power lever frame dating from around 1910. The levers are interlocked with each other through tappet locking in the vertical tray at the front of the frame.
Lever functions visible, on levers that have been "reversed", are:
| 5 SIGNAL DOWN SUBURBAN DISTANT 8.7.6 |
6 SIGNAL DOWN SUBURBAN HOME |
7 SIGNAL DOWN SUBURBAN STARTING NIL OR 13 |
8 SIGNAL DOWN SUBURBAN ADVANCE 43 OR 49 OR 52 OR 52.46 |
20 POINTS UP MAIN SIDING No3 |
22 POINTS UP MAIN TO YARD |
Trains on this four-track main line were signalled by the four British-built Tyer's One-Wire Three Position block instruments above the frame, and a variety of signal repeaters from the same manufacturer can also be seen.
Although the manufacturer of this frame has not been identified, it bears great similarity to the Spanish-built Bianchi-Servettaz frame at Seville Plaza da Armas in Spain.
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Comments about this article should be addressed to John Hinson |