Acoustic warning device for preventing short-term sleep has module for acoustic activation suitable for 3 Volts d.c.; acoustic activation takes place via connection terminating in plastic olive

摘要

The acoustic warning device has a module (1) for acoustic activation suitable for 3 Volts d.c. the module for acoustic activation is suitable for 3 Volts d.c. from a battery (2) and is mounted in a housing (3). Acoustic activation takes place via a connection (4) terminating in a plastic olive (5) and involves a mercury switch (6) in the housing.