TELEPHONE No. 19

Wall type telephone with Deckert transmitter for use on CBS exchanges.    This telephone could also be used on Exchanges of the permanent current system, which uses the relay that is fitted within the instrument.

This telephone is fitted with two switch hook switches (changeover type) and two receivers.

This telephone replaced the second pattern Gower-Bell telephone (double receiver) and was known initially as the "Telephone for Granular Transmitter 'B' (GTB)".    By 1909 the telephone was called the Telephone No. 19.

Introduced circa 1901.

It has a press button fitted in the top of the case.

There is no bell in the telephone so a "Bell, Magneto, 100ohm" would have been provided and fitted externally.  When connected to the permanent battery systems a DC bell would have been installed which operated using the relay inside the case and the batteries associated with the telephone.

The front of the case is removable and is fixed by means of two side mounted, knurled, finger screws which also act as the electrical connection for the transmitter.

Similar in construction to the Telephone No. 17, which has a one receiver and the Telephone No. 21, which has different gravity switch contact arrangements.

Note the oval brass number plates.  Each bell and telephone carried its inventory number.  Around 1907 the Post Office realised that numbering each telephone was too much effort for too little usefulness and stopped the practice.

The Gower-Bell, 2nd Pattern, with two Receivers, was the basis for this telephone.

Telephone includes:-
1 x Coil, Inductor No. 1.
1 x Relay, Telephone, 100ohm.
1 x Cord, Flexible No. 222.
2 x Receiver, Bell No. 2.
2 x Arm, Switch, Bell, Receiver.
1 x Transmitter No. 3 (Deckert).

Circuit Diagram - N119  (This diagram requires verification as it looks incorrect).

Picture dated 1901
The backboard and bell were supplied separately

Circuit Diagram