A water-tight, Incombustible, industrial Hooter, in cast-metal case. Can be supplied to work off Batteries or direct from Service Mains up to 250 volts, A.C. or D.C., as ordered.
These Sounders, by means of the Relays shown on page 34, can be operated by the Contact Makers, Fig. C68, etc., shown on page 32, or by the Bell Ringing Contacts as detailed above at Fig. C9. If a half minute signal Is considered too long then the duration can be adjusted by the Duration Contact, also shown on page 34-Connections page 42.
For fuller details of such Sounders, see the Catalogues referred to.
