System for monitoring containers with ultrasonic seals using aut

Details System for monitoring containers with ultrasonic seals using aut System for monitoring containers with ultrasonic seals using aut

1985-09-16

1987-08-25

Birmiel, Howard A.

Communications: electrical

Condition responsive indicating system

Specific condition

73595, 73627, G09F 303

Patent

active

046896120

ABSTRACT:
System for monitoring containers with ultrasonic seals.
According to the invention the seal is duplicated and comprises a transmitting transducer and a receiving transducer. The exciting signal is a voltage step applied to the transmitting transducer and the circuit able to supply said step is directly connected to the transmitting transducer without a connecting cable.
Application to the monitoring of containers containing dangerous products, precious materials, documents, etc.

REFERENCES:
patent: 4592236 (1986-06-01), Battagin et al.
500 Le Nouvel Automatisme, vol. 26, No. 19, Jan.-Feb. 1981, pp. 61-66.

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