Memory Wire Signal Operation - Dave Carter
The options for signal operation are:-
- Manual, Mercontrol wire and tube etc.
- Modified electric relays.
- Proprietary electric signal motors.
- Memory wire.
This page pictorially demonstrates the signal operation by means of memory wire on the model railway layout Adavoyle.
Signal Operating Arrangement
The signal has a brass weight which returns the arm to danger when the motor is switched off.
Signal in Place With Motor
Here the operating arm is well clear of the return weight in the ON position.
Signal in Place With Motor
Signal in OFF position, motor on.
The Signal Motor Single Unit
The Signal Motor Double Unit
The resistors are mounted at the rear, clear of the memory wire.
Rear view of PCB Double unit
Angle cut away to clear 68 Ohm resistors.
The Bellcrank
This is made up from brass tube, copper clad, brass 1.0 mm wire & pins.
Flexonol Memory Wire
0.0039" dia. 1,000,000 cycles operation
The Wiring Schematic
List of Suppliers
Memory wire - Milford instrumentsResistors - Maplins
Multipin plug & sockets and heat shrink insulation - All Components
Copper clad Paxolin & BA screws, nuts - Eileen's Emporium
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