CA1106933A - Dispositif d'alarme declenche par la capacite du corps de l'intrus - Google Patents

Dispositif d'alarme declenche par la capacite du corps de l'intrus

Info

Publication number
CA1106933A
CA1106933A CA302,638A CA302638A CA1106933A CA 1106933 A CA1106933 A CA 1106933A CA 302638 A CA302638 A CA 302638A CA 1106933 A CA1106933 A CA 1106933A
Authority
CA
Canada
Prior art keywords
alarm
oscillator
battery
signalling
transistor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA302,638A
Other languages
English (en)
Inventor
George N. Butler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of CA1106933A publication Critical patent/CA1106933A/fr
Expired legal-status Critical Current

Links

CA302,638A 1977-05-02 1978-05-04 Dispositif d'alarme declenche par la capacite du corps de l'intrus Expired CA1106933A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US79288777A 1977-05-02 1977-05-02
US792,887 1977-05-02

Publications (1)

Publication Number Publication Date
CA1106933A true CA1106933A (fr) 1981-08-11

Family

ID=25158365

Family Applications (1)

Application Number Title Priority Date Filing Date
CA302,638A Expired CA1106933A (fr) 1977-05-02 1978-05-04 Dispositif d'alarme declenche par la capacite du corps de l'intrus

Country Status (1)

Country Link
CA (1) CA1106933A (fr)

Similar Documents

Publication Publication Date Title
US4325058A (en) Pre-intrusion detection and alarm system
US4173755A (en) Battery-operated body capacitance intrusion alarm apparatus
US4831279A (en) Capacity responsive control circuit
US4099168A (en) Intrusion alarm and emergency illumination apparatus and method
US3930249A (en) Self actuating wallet alarm
US4617555A (en) Receiver for audible alarm
US4785291A (en) Distance monitor especially for child surveillance
US4450437A (en) Motion alarm system
US4885572A (en) Anti-theft alarm device for vehicle
US4091371A (en) Touch-responsive portable intrusion alarm
US4168495A (en) Pre-intrusion detection device
CA1061016A (fr) Detecteur de fumee
US5512881A (en) Personal alarm apparatus
US4236147A (en) Automatic doorbell
US4621258A (en) Proximity detecting apparatus
US5724919A (en) Device for achieving animal response
US4470040A (en) Microvibration detector using a single piezoelectric element as both sensor and alarm generator
US4255745A (en) Apparatus for audible altering of enclosure opening
US4241335A (en) Automatically supervised alarm system
CA1106933A (fr) Dispositif d'alarme declenche par la capacite du corps de l'intrus
US4435700A (en) Event detection and indication system
US4287513A (en) Door knob alarm device
US5164706A (en) Briefcase/handbag alarm device
WO1995022366A1 (fr) Systeme de surveillance a distance comportant un generateur de tonalite permettant de verifier le fonctionnement du systeme
US4531115A (en) Remote alarm system

Legal Events

Date Code Title Description
MKEX Expiry