Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1993-04-09
1996-05-07
Peng, John K.
Communications: electrical
Condition responsive indicating system
Specific condition
340541, 340568, 340652, G08B 1308
Patent
active
055150306
ABSTRACT:
A reusable electronic seal is provided for detecting whether the contents of a container may have been disturbed. In a preferred embodiment, the electronic seal is used in conjunction with a coin box of a pay telephone. The reusable electronic seal is adapted to permanently or removably attach to the lid of the coin box. The electronic seal includes a latch pin, a switch operatively connected to the latch pin, a timer chip operatively connected to the switch, a latch pin spring for securing the electronic seal to the latch of the coin box and for resetting the timer chip, and a crystal for generating a fixed frequency to the timer chip. The electronic seal further includes an infrared light emitting diode that modulates the light emitting diode and sends a signal to a communications device, and a phototransistor for reading the clock signal from the communications device and a battery for supplying power to the timer chip, the infrared light emitting diode, the phototransistor and the crystal.
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Baietto Henry R.
Citron Howard M.
Lee Benjamin C.
NYNEX Science & Technology, Inc.
Peng John K.
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