Communications: electrical – Continuously variable indicating – With meter reading
Patent
1990-05-02
1991-04-09
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
180167, 180287, 307 104, 307 106, 307 102, 361172, 3408253, B60R 2500, H04Q 900
Patent
active
050068431
ABSTRACT:
The disclosure describes a security system for motor driven vehicles and motor operated plants which uses a micro-chip that is mounted inside vital motor accessories and prevents these accessories from operating without the entry of a 4-digit code word. The micro-chip consists of a silicon substrate and an added semiconductor-switch that adapts the micro-chip to the various switching requirements of the various types of motor accessories. The silicon substrate carries all circuitry for data entry, data storage, conparison, evaluation and control functions and is designed to store data without power. Special circuits are provided to adapt the unit to a number of service requirements, such as maintenance, automatic code entry, and erasure of forgotten codes.
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patent: 4888575 (1989-12-01), De Vaulx
Pudpud Eric O.
Yusko Donald J.
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