TELEPHONE No. 42

A simple portable, Magneto, telephone using a Telephone No. 34 as the handset.

Previously known as the "Telephone Portable with Generator and Vibrator" it was later renamed as the Telephone No. 42 circa 1911.

This telephone uses a Vibrator (buzzer) to indicate incoming calls.

The 3-contact key on the Micro Telephone must be depressed for both speaking and listening.

Calls are received on the Vibrator, or "Buzzer," which is in circuit when the 3-contact Key is in the normal position.

Requires two Cells, Dry X.

In 1914 the NTC "Instruments, Test N.T. I.T.B" were renamed Telephone No. 42.

Introduced circa 1910.

Found is the 1910, 1911, 1912, 1913 and 1914 Rate Books.

Telephone includes (1910, 1911, 1912, 1913 and 1914):-
1 x Telephone, No. 34.
1 x Vibrator (250 ohms).
1 x Generator.
1 x Induction Coil 150/1.

Wiring diagram - N142.

 
 
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Last revised: October 26, 2025

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