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| Special fire telephone
used
in exchange buildings |
This is the later
model called the Mk 4 |
Fire emergency phone for use in CB and Automatic exchanges.
The Mark 4 version consisted of a Telephone
No. 232 mounted on a Bellset which
in turn is mounted on a wooden box that houses batteries and a
hand generator. The hand
generator is locked by means of a releasable metal bar.
The Mark 4 was introduced in 1938.
Telephone included (1928):-
1 x Bell, magneto, 1000w.
1 x Coil, induction, No. 3 or No. 14 .
3 x Condensers, M.C., No. 1.
2 x Cords, instrument, No. 116.
1 x Cord, instrument, No. 222.
1 x Frame, Notice, No. 1.
1 x Generator, N.T. No. 1001.
1 x Key, No. 72, red.
1 x Key-mounting V.
1 x Receiver, Bell, No. 1A.
1 x Transmitter, N.T. No. 13.
1 x Transmitter No. 1 and Adapter, transmitter, if used for
maintenance.
Telephone included (1946 and 1956):-
1 x Bell-set No. 26.
1 x Glass No. 3.
1 x Cap, Lamp, No. 2-1C.
1 x Jack, Lamp, No. 10.
1 x Clip No. 31.
1 x Key No. 72, Red.
2 x Condenser, M.C., No. 102.
1 x Key-mounting, V.
1 x Cordage, Inst., No. 2/B, Brown, 18".
1 x Relay No. 503A.
1 x Relay-cover, AK.
1 x Frame, Notice, No. 1.
1 x Telephone No. 164, Black, with Cord, 3/63KB, 33".
1 x Generator. No. 26A with adapter, generator, D 63018
and Handle, Generator, No. 15 (earlier supplies fitted with
Generator No. 8A).
1 x Telephone No. 1/232CB, Incomplete (minus Base, Telephone No.
1/162).
To be requisitioned separately as required:-
3 x Cells, Leclanché, DS 5
1 x Lamp No. 2- ... V.
Circuit diagram - N181.
Diagram C./B. 1185.
Adjustment of Magneto bells
Telephone No 81 (Mark 4)
Looking down into the unit with the lid
open
Pictured below is the Telephone
No. 103
It has an big generator which needs an enlarged cover
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