For my train order semaphore I used Hump Yard Purveyance lever quadrants. Unfortunately, these have not been available for a while so you might have a hard time finding those.
car_stop4 by Edmund, on Flickr
BnO_5300_full-sm1800 by Edmund, on Flickr
Since there is both an eastbound and westbound TO signal it would require two Circuitron Tortoise drivers. That can get expensive quickly and since a train order signal isn't an "automatic" signal I prefered to operate mine manually.
I have several of the Circuitron semaphore drivers using a Tortoise as the actuator and I haven't gotten around to actually installing them. I have tested them using the boards and detectors from LogicRail and they work very dependably but are a bit fussy to initially setup.
http://www.logicrailtech.com/
Here is the instruction sheet for the semaphore motor from Circuitron:
http://www.circuitron.com/index_files/ins/800-5520ins.pdf
Hope that helps, Ed
I am trying to get the parts for the tomar train order signal #tmr845, and I was wondering if anyone had experince with this signal? Esp. does it work as it should with three positions? Is it very difficult to install? Thank you for your time.