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Special fire telephone
used
in exchange buildings
Mark 235 and Mark 3 |
This is the later
model called the Mark 4 |
These are a
Fire emergency phone for use in CB and Automatic telephone exchanges.
These were used to call the Fire Brigade and went via the area
operator suite.
The Mark 235 and Mark 3 were probably from the National Telephone Company
and manufactured by Western Electric. One of these is shown in
the above left hand picture.
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.
Found in the 1915, 1928, 1946 and 1956 Rate
Books.
Telephone included (1916):-
1 x Instrument, Subscribers, Wall N.T. No. 15.
1 x Key No.
107A.
Telephone included (1928):-
1 x Bell, Magneto 1000w.
1 x Coil, Induction No. 3 (Mark 235) or No. 14 or No. 18 (Mark
3).
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 (Mark 235) or Transmitter No. 22
(Mark 3).
1 x Transmitter No. 1 and Adapter, transmitter, if used for
maintenance.
1 x Lamp No. 2 (Mark 3).
1 x Relay No. 503A (Mark 3).
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, Instrument 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 No. 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 (GPO).
Circuit diagram - N181 (NTC).
Circuit diagram - C.B. 1185.
Drawings - 63018/1 and
63018/2 (Mark 4).
Specification - D1299.
Adjustment of Magneto bells
Telephone No 81 (Mark 4)
Looking down into the unit with the lid
open
External view
Pictured above is the similar Telephone
No. 103
It has an big generator which needed an enlarged cover
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