BELL No. 1A & BELL No. 1A Unmounted

Wall mounted, wooden cased bell box. The bell box comprises of a 1000 ohm magneto ringer, 16c/s only (AC). Each bell ringer coil is 500ohms.

The Bell-gongs No. 2 are 2.5" / 64mm in diameter.

Two variants were produced, one with a bias spring and one without. Click here for more information on Bias Springs.

The Bell ringer mechanism is called a "Bell No. 1A, Unmounted" and this, on it's own, is generally fitted to most wooden wall phones and Bellsets. This Bell ringer was also produced with a Bias Spring and called the "Bell No. 1A, unmounted, with Bias Spring".

The Bell No. 1 was introduced circa 1913, whilst the "Bell No. 1A, Unmounted" was introduced circa 1909.

The housing is called a Case No. 3.

Dimensions - 8 inches high by 6¾ inches across.

The Buzzer No. 1 is exactly the same design except that the bell gongs and clapper arm on the ringer are not fitted.

Normally fitted with matched bell gongs, but where a distinctive tone is required, the following combination of 2.5in gongs can be used:-
Bells-gongs No. 2 - Nickelled or oxidised.
Bells-gongs No. 2A - Nickelled or oxidised.
Bells-gongs No. 3 - Aluminium.
Bells-gongs No. 17 - Steel or bronzed with concentric hole.
Bells-gongs No. 12 - Cow gongs - cannot be fitted to Bells Nos. 1A or 59A.

Note
This is a bell only and has no induction coil or other components fitted. Because of this it CANNOT be used as a direct replacement for a Bellset No. 1 or 25.

Therefore it should NOT be used as the only Bellset on any Candlestick or Telephone No. 162. It can, however, be used as a simple extension bell.

Superseded by Bell No. 59A circa 1962.

Drawing - 1796 (1913).

Drawing - 62933 (unmounted Mk 234).

Specification - D191.

British Ericsson (ETL) produced some of these bells and their part number was N3100T.

Adjustment of Magneto bells

Click here for the difference between a Bell and a Bellset