Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1995-03-20
1996-11-26
Hofsass, Jeffery
Communications: electrical
Condition responsive indicating system
Specific condition
340458, 315136, 315131, 324414, 324525, G08B 2100
Patent
active
055789986
ABSTRACT:
A method and apparatus for identifying electric lamps likely to fail due to a violated internal atmosphere monitor voltage through a resistor in order to ascertain a increasing internal resistance of the lamp. The apparatus of the present invention preferably includes a power supply and a resistor in series with the electric lamp. The apparatus further includes a data acquisition system for comparing a voltage drop across the resistor at a predetermined time with a predetermined minimum value. The method of the present invention utilizes the circuit of the apparatus and includes the steps of establishing a predetermined minimum value of voltage drop across the resistor for acceptable lamps, placing a test lamp in series with the battery and resistor, and supplying voltage to the test lamp for a test interval of time. The method further includes the steps of determining a voltage drop across the resistor at a predetermined time, comparing the voltage drop with the predetermined minimum value, and rejecting the lamp when the voltage drop is below the predetermined minimum value.
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Chivas Products Limited
Hofsass Jeffery
Wu Daniel J.
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