The following are some of the companies who provided equipment at Petone:

• Westinghouse Mckenzie Holland (Naenae)
  
• Mckenzie and Holland (NZ) Ltd
  
• Siemans and General Electric Railway Signal Company Ltd London.
  
• General Railway Signal Co Ltd London
  
• Westinghouse Brake and Signal Co London
  
• ?? Telecommunications Ltd.
  
• Electromagnetic ?? Ltd (EMR).

The relay room is on the ground floor, entered by the blue end door. The panel is on the first floor.

Entrance to the relay room is via a work area, with a bench on the left.

Racks supporting the various relays.

Wires to the panel on the first floor.

Remnant of a once extensive phone network at Petone.

A spare location waiting for an interesting photo!

A 60 second timer. Some of the timers have inspection stickers dating from the 1940s.

Another 60 second timer. Inside the case are what look like Post Office relays.

A neutral relay used as a track circuit repeater.

A neutral relay manufactured by the General Railway Signal Company, London.

A latching relay operated by a lever on the panel. Known as a "monkey on a stick" relay. Two vertical bars, connected to the Normal and Reverse coils respectively, move vertically. There are latches at the bottom. Used as a lock relay for points and signals.

The Normal coil of a "monkey on a stick" relay is latched (left). This relay is used in a signal circuit so the Reverse coil (right) does not have a latch, allowing the reverse relay to drop immediately the lever is put back to Stop. The Normal coil economiser contacts are bottom left.

A two-position two-element vane track relay.

A way of using plug in relays in older installations.

A three-position two-element vane relay used in a points indicating circuit. This relay was tested on 1/1/1948. I wonder if they really did work on New Year's Day? Another relay of this type at Petone was made in April 1938.

A three-position points indicating relay. The points are Normal.

A 10 micro Farad, 1500V capacitor.

A track feed tranformer out of use.

Newer style plug in relays.

On the right a 110V AC to 12V DC rectifier. On the left an unknown device.