Electric lamp and discharge devices: systems – With signal – indicator – or alarm
Patent
1990-09-14
1991-08-20
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
With signal, indicator, or alarm
315 82, 340641, 340643, G08B 2100, B60Q 102
Patent
active
050417614
ABSTRACT:
A magnetic automotive lamp current sensor has a coil 12 connected in series with an automotive lamp 14 (FIG. 2). The coil is mounted on a core 15 having a channel 16 through which the turns of the coil pass an has an opening 18 in which a magnetic flux sensor 20 is inserted. Whenever the lamp is powered and functioning, a current flows through the coil inducing a magnetic field in the core which concentrates in the opening. The flux sensor detects the magnetic field and generates an output which is regulated by a transistor 50 to drive an automotive circuit 53 that monitors the operation of the lamp.
REFERENCES:
patent: 3956733 (1976-05-01), Sakurai
patent: 3995262 (1976-11-01), France et al.
patent: 4667187 (1987-05-01), Volk et al.
Buccinna Frank
Olmstead Harry F.
Webb Nathaniel
Wright James A.
LaRoche Eugene R.
Neyzari Ali
United Technologies Automotive Inc.
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