for special purposes with four way cord.
Can also be found with a built in switch of three different variants. These models were called Tele No. 184A, B & C.
The switch could be configured in different ways:-
A - CB & Auto areas. Pressing switch removes short circuit from transmitter. (3 wire)
B - LB systems. Pressing switch (locking) completes transmitter circuit. (3 wire)
C - Supervisors use. Locking switch that completes transmitter circuit. (4 wire)
Circuit diagram N284.
Click here for the circuit diagram - N284.
See also the Telephone Efficiency Committees Report
on Local Battery Area telephones
Receivers Inset 1L and 2P
Early handsets were fitted with a Receiver No. 1L but these were
superseded by the Receiver inset 2P. The two are not interchangeable
unless the correct diaphragm and earpiece are used.
Receiver No. 1L with Earpiece No 18 and Diaphragm No. 12
Receiver No. 2P with Earpiece No 23 and Diaphragm No. 25
Remove of the Receiver and Mouthpiece
The Earpiece must be firstly removed by unscrewing anticlockwise. This
will either be very easy or very hard. If the earpiece will not budge
then try the following:-
Ask a friend to have a go - my neighbour is great with
Spray WD40 around the edge, hoping that it penetrate the
thread. Leave a couple of days.
Use a vice and wrap the earcap in a rag or card board -
Place the earpiece in very hot water - hopefully it will
Cover with a rag and tap the earpiece on a hard surface
- this may break the earcap!
Smash it and replace!
removed - slide off the diaphragm - see the picture to the right. Then
you will find two screws - remove the receiver will fall out.
To be honest they do not go wrong often. The normal
problems with them are:-
One of the screws is not tightened down.
Ingress of water rusting the internals.
Rust on the pole faces.
The mouthpiece is located on three lugs, one of which is sprung loaded.
The mouthpiece has a hole which can be located on the handle side of the
To remove, use a drawing pin and push into the hole under
pressure. This pushes one of the metal lug inwards and allows the
mouthpiece to be unscrewed anticlockwise.
The Microphone Inset will drop out exposing the screw
terminals for the handset cord.