| (19) |
 |
|
(11) |
EP 0 373 716 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
19.06.1991 Bulletin 1991/25 |
| (43) |
Date of publication A2: |
|
20.06.1990 Bulletin 1990/25 |
| (22) |
Date of filing: 08.12.1989 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE ES FR GB GR IT LI LU NL SE |
| (30) |
Priority: |
10.12.1988 GB 8828896
|
| (71) |
Applicant: ID SYSTEMS INTERNATIONAL B.V. |
|
NL-8042 PD Zwolle (NL) |
|
| (72) |
Inventor: |
|
- Higgs, Raymond Ronald
Brentwood
Essex CM15 OHL (GB)
|
| (74) |
Representative: de Bruijn, Leendert C. et al |
|
Nederlandsch Octrooibureau
P.O. Box 29720
2502 LS Den Haag
2502 LS Den Haag (NL) |
|
| |
|
| (54) |
An anti-tamper device |
(57) An anti-tamper device for use with a security detection apparatus and provided with
timer means (12) and detector means (14). Upon the detection of a person or article
by the detector means, said means initiate the timer means. timer means (12) sare
arranged such that this means initiates the operation of an alarm device (16) if an
expected subsequent movement of the person or article does not occur after initiation
of the timer means and within a time period set in the timer means.