Remote Signal Activator
The Remote Signal Activator allows the TORTOISE™ to drive any scale crossing gate or semaphore-style signal that has a vertical actuating wire extending through the layout base. The actuator features positive, screw-adjusted stops at both the vertical and horizontal positions.
Tortoise™ is a trademark of Circuitron. RR-CirKits is an authorized reseller.
See Circuitron's website for manual: