FIELD: guard alarm systems, applicable for guard of small-shape museum exhibits. SUBSTANCE: the device has piezoelectric sensitive elements serving as a support for the guarded object and perceiving the body mass together with the guarded object, or only the mass of the guarded object, at an external action on the guarded object a signal appears from the output of the mentioned elements opening the transistor key with a collector resistance at least 1Mohm, as a result, the radio transmitter is switched on for the time of transmission of the alarm signal. EFFECT: developed a simple and compact self-contained device. 6 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR GUARDING OBJECT BEING CONTROLLED AND DEVICE FOR REALIZATION OF SAID METHOD | 2004 |
|
RU2281558C2 |
| PROTECTION SIGNALLING APPARATUS | 1991 |
|
RU2031445C1 |
| RADIO SIGNALLING AND DETECTION METHOD AND SYSTEM FOR ITS IMPLEMENTATION | 1993 |
|
RU2099791C1 |
| METHOD FOR GUARDING SECURED OBJECTS | 1997 |
|
RU2124757C1 |
| VIBRO-METRIC INTRUDER ALARM DEVICE | 2006 |
|
RU2319210C1 |
| INTRUDER ALARM METHOD, DEVICE FOR REALIZATION OF SAID METHOD AND TEMPERATURE INDICATOR | 2006 |
|
RU2313830C1 |
| PIEZOELECTRIC SIGNAL TRANSDUCER AND ALARM SIGNAL TRANSMITTER BASED ON PIEZOELECTRIC SIGNAL TRANSDUCER | 1999 |
|
RU2168213C1 |
| DEVICE OF WARNING SIGNALIZATION WITH ADDRESS COMMUNICATION | 1991 |
|
RU2069014C1 |
| GUARD SIGNALLING SYSTEM | 1991 |
|
RU2012925C1 |
| SEISMOACOUSTIC DETECTOR | 1992 |
|
RU2032222C1 |
