EP 0093810 B1 19870318 - MONITORING THE PRESENCE OF HUMAN ACTIVITY IN AN ENVIRONMENT
Title (en)
MONITORING THE PRESENCE OF HUMAN ACTIVITY IN AN ENVIRONMENT
Publication
Application
Priority
EP 82302319 A 19820506
Abstract (en)
[origin: EP0093810A1] A apparatus for automatically de-energizing electrically operable equipment in response to a lack of animal activity, such as human activity, in a specified environment during predetermined time period. The apparatus utilizes a circuit (10) which is designed to detect activity which generates energy in a certain wavelength range and particuiarly, sonic energy. If sound is sensed in the specified environment within the time interval determined by timer (30), a signal is generated to energize or maintain energization of one or more electrical devices (38). Contrarywise, if no sound is detected within the predetermined time interval, there is a resultant de-energization of the electrically operable equipment. A control may be provided to adjust the predetermined time delay period. A control may also be provided for adjusting the sensitivity of the device.
IPC 1-7
IPC 8 full level
G08B 13/16 (2006.01); G08B 21/04 (2006.01)
CPC (source: EP)
G08B 13/1672 (2013.01); G08B 21/0415 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0093810 A1 19831116; EP 0093810 B1 19870318; AT E26033 T1 19870415; DE 3275774 D1 19870423
DOCDB simple family (application)
EP 82302319 A 19820506; AT 82302319 T 19820506; DE 3275774 T 19820506