TELEPHONE No. 184


Bakelite handset 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 - Web users - CD users.

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Early handsets were fitted with a Receiver No. 1L but these were superseded by the Receiver inset 2P.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

Receiver
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:-

  1. Ask a friend to have a go - my neighbour is great with these.

  2. Spray WD40 around the edge, hoping that it penetrate the thread.  Leave a couple of days.

  3. Use a vice and wrap the earcap in a rag or card board - be careful.

  4. Place the earpiece in very hot water - hopefully it will expand.

  5. Cover with a rag and tap the earpiece on a hard surface - this may break the earcap!

  6. Smash it and replace!

Once 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:-

  1. One of the screws is not tightened down.

  2. Diaphragm missing.

  3. Ingress of water rusting the internals.

  4. Rust on the pole faces.


Mouthpiece
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 handset.

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.

 

 
 
BACK Home page BT/GPO Telephones Search the Site Glossary of Telecom Terminology Quick Find All Telephone Systems

Last revised: May 15, 2010

FM