Memory Wire Signal Operation - Dave Carter

 
The options for signal operation are:-

 

 
This page pictorially demonstrates the signal operation by means of memory wire on the model railway layout Adavoyle.

 

Signal Operating Arrangement

Memory wire signal operation The signal has a brass weight which returns the arm to danger when the motor is switched off.

 

Signal in Place With Motor

Memory wire signal operation Here the operating arm is well clear of the return weight in the ON position.

 

Signal in Place With Motor

Memory wire signal operation Signal in OFF position, motor on.

 

The Signal Motor Single Unit

Memory wire signal operation

 

The Signal Motor Double Unit

Memory wire signal operation The resistors are mounted at the rear, clear of the memory wire.

 

Rear view of PCB Double unit

Memory wire signal operation Angle cut away to clear 68 Ohm resistors.

 

The Bellcrank

Memory wire signal operation This is made up from brass tube, copper clad, brass 1.0 mm wire & pins.

 

Flexonol Memory Wire

Memory wire signal operation 0.0039" dia. 1,000,000 cycles operation

 

The Wiring Schematic

Memory wire signal operation

 

List of Suppliers

Memory wire - Milford instruments
Resistors - Maplins
Multipin plug & sockets and heat shrink insulation - All Components
Copper clad Paxolin & BA screws, nuts - Eileen's Emporium

 

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