Signal winch

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A signal winch is used to set a mechanical railway signal . In contrast to the signal lever , a crank is operated here, the rotary movements of which are transmitted to the pulley via a worm gear . This improves the torque so that the signal can be located 1200 m to 1800 m from the interlocking .

Components of a signal winch are the rope pulley and the small adjusting grooved pulley as well as the crank, gear lever and a fault shield. The overall width of the signal winch does not differ from that of a signal control lever, so that if necessary they can be interchanged on the lever bank.

The signal winch can also be used to display two or three conceptual signals. For example, in order to set a form main signal in one of the two driving positions, a shift lever is first thrown to determine the desired position ( Hp0, Hp1 or Hp2 ). Then the crank can then be turned in the direction of the shift lever. Depending on the design, two or four turns are necessary to switch the signal.