Bottles and jars – Content indicating – Interior of receptacle
Patent
1988-02-25
1989-03-21
Norton, Donald F.
Bottles and jars
Content indicating
Interior of receptacle
215250, 215252, 206807, 229102, 336200, 340572, B65D 5502
Patent
active
048135640
ABSTRACT:
The package includes a body and a closure. A readily breakable electrical oscillatory network sans power supply is physically connected between the body and the closure. The network is tuned to resonate at a predetermined frequency. The package is monitored by a transmitter-receiver when it is distributed to a customer. The transmitter produces pulse signals in a carrier frequency band which overlaps the resonant frequency of the network. During monitoring the package is placed in the field of the transmitter and the oscillatory network is excited to produce a decaying pulse for each transmitter pulse. The receiver is gated during the interval when each transmitter pulse is generated but is receptive of the corresponding decaying pulse from the network. If the package is sealed, the oscillatory network is intact and the receiver receives decaying pulses which produce visual or audible signals. If the package has been opened, the network is broken and no signals are produced.
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Cooper Martin H.
Petrosky Lyman J.
Norton Donald F.
Westinghouse Electric Corp.
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