TELEPHONE No. 99


Street fire alarm telephone
These were used in simple direct public telephone fire alarm posts and call offices.

Cased in wood this telephone was housed in a Boydell Head (shown below), which were mounted on posts, on the pavement, or attached to convenient walls.

The receiver cord is wound onto a cotton reel type of device.

This is a Magneto telephone.  A similar telephone for CB working was also produced - the Telephone No. 97.

Telephone includes (1928):-
1 x Cord, Instrument No. 222, waterproof.
1 x Roller, Spring, for receiver cord.
1 x Cord, Instrument No. 248.
4 x Springs, Clip, Protector, G.
1 x Hook, Receiver J.
1 x Switch, Receiver No.2.
2 x Protectors G.
1 x Terminal No. 9.
1 x Receiver, Bell No. 1A.
1 x Transmitter No. 2.
1 x Coil, Induction No. 1 or 12.
1 x Generator No. 4C.

To be requisitioned separately:-
2 x Cells, Dry, Y.

Telephone includes (1947 and 1956):-
1 x Cordage, Instrument No. 2/F, Black.
1 x Protector and Fuse No. 1 2/2 minus cover.
1 x Receiver, Bell No. 1A.
1 x Cord, Instrument No. 2/22B, Brown, 33".
1 x Roller, spring, for receiver cord.
4 x Springs, Clip, Protector G.
1 x Coil, Induction No. 12.
1 x Switch Receiver No. 2.
1 x Generator No. 26A.
1 x Transmitter No. 22.
1 x Hook, Receiver J.
1 x Blocks Terminal No. 21/2 (1956).
1 x Blocks Terminal No. 21/3 (1956).
1 x Blocks Terminal No. 21/12 (1956).

To be requisitioned separately:-
4 x Cells, Leclanche, DS 5.

Circuit diagram - N199.

Circuit diagram - Diagram F.A. 110.

Drawing - 8122 (Mark 234).

GPO Engineering Instructions on Fire Systems

 

 

 

 
 
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Last revised: September 13, 2023

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