Non-volatile fault display with magnetic reset switch for adapti

Details Non-volatile fault display with magnetic reset switch for adapti Non-volatile fault display with magnetic reset switch for adapti

1988-03-25

1989-06-06

Crosland, Donnie L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340525, 340568, 34081515, B60Q 100

Patent

active

048375527

ABSTRACT:
A fault indicating mechanism for an electronic system, such as a vehicle adaptive braking system, includes a series of visual indicators, such as light emitting diodes, on one surface of the housing within which the electronic components comprising the system are sealed. Each of the indicators is activated in response to a predetermined malfunction sensed in the system, such as a defective speed sensor, defective modulator, or a defect in the electronic circuitry. A magnetically responsive switch is sealed within the housing adjacent the indicators, but is not visible from the exterior of the housing. The indicators are reset when the system is repaired by the mechanic who holds a common magnet against the housing adjacent the switch. When the switch is activated by a magnet, all of the indicators flash on and are then turned off. A non-volatile RAM stores malfunctions sensed by the system when the system is powered down, so that all malfunctions are again indicated immediately when the system is powered up.

REFERENCES:
patent: 4011555 (1977-03-01), Pearce
patent: 4271402 (1981-06-01), Kastura et al.
patent: 4536758 (1985-08-01), Schweitzer, Jr.
patent: 4635034 (1987-01-01), Tokuyama et al.

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