BELLSET No. 33

The Bellset No. 33 was fitted inside a Box Coin Collecting No's 14D & 14E, in Automatic exchange areas and connected to a Telephone No. 238.

This Bellset was produced with a cable entry hole, in the centre, which has a shroud to prevent the wiring interfering with the bell mechanism.  The jack, fitted to the lower right, is where the coin mechanism connects to.

There are three variants of the Bellset No. 33.  The variations are:-
Mark 1 - Original specification - Uses a Coil Induction No. 22.
Mark 2 - Modified mounting plate and the 30 ohm Resistor was not fitted.
Mark 3 - Electrical circuit has been changed to prevent fraud and fitted with a Coil Induction No. 27.
 

Bellset included (1946):-
1 x Bell, No. 59A, Unmounted.
1 x Condenser, M.C., No. 102.
1 x Bell-gong No. 2, Nickelled.
1 x Bell-gong No. 2A, Nickelled.
1 x Jack No. 59.
1 x Resistor, Coil No. 12 - 30 Ohms.
1 x Resistor, Coil No. 12 - 200 Ohms.
1 x Clip No. 29.
1 x Coil, Induction No. 27.
2 x Washers, Locking No. 1210.

Bellset included (1956):-
1 x Bell, No. 59A, Unmounted.
1 x Capacitor, Paper No. 7705.
1 x Bell-gong No. 2, Nickelled.
1 x Bell-gong No. 2A, Nickelled.
1 x Jack No. 59.
1 x Resistor, Coil No. 12 - 120 Ohms.
1 x Clip No. 51D.
1 x Coil, Induction No. 27.
2 x Washers, Locking, No. 1-2 BA.

Circuit diagram - N533.
Drawing - 90549/1 & 90549/2 (Mark 3).

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The picture blow shows were the parts are located.  The Induction coil is upper left, the Capacitor is lower centre, the 200 ohm Resistor is just below the right hand bell gong and a bell ringer with two gongs.

Bellset No. 33 mark 3

Bellset No. 33 Mark 1 installed in a coin box.
This has the later mounting plate which is pre drilled for relays and coils.

Last revised: March 16, 2023