Keyboard hold-down functions for a multi-zone intrusion detection system
US4667183A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 9, 1985 |
| Grant date | May 19, 1987 |
| Priority date | — |
| Expiry date | Sep 9, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An intrusion detection system of the type employing a keypad utilizing the keys to conventionally enable a user to key in a secret code capable of arming or disarming the system. The present apparatus includes a hold-down feature whereby if any one of the plurality of keys on the keypad is depressed for a predetermined interval, the apparatus detects the predetermined timing interval and transmits an audible sound to the user indicating that the requisite timing interval has transpired. Upon receipt of the audible sound, as depending upon the test to be performed, the user is thus informed that the system will now commence the test procedure as defined by the selected key. Thus the system includes apparatus for detecting the requisite timing interval. Upon detection of the requisite timing interval a storage means is activated, which storage means is associated with the selected key. Upon activation of the storage means, the output of the storage means is directed to the intrusion system whereby the intrusion system is now programmed to undergo the test procedure or operating procedure which is defined by the selected key as depressed for the requisite timing interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.