Electricity: measuring and testing – Internal-combustion engine ignition system or device – Apparatus for coupling a measuring instrument to an ignition...
Patent
1981-02-02
1983-08-30
Krawczewicz, Stanley T.
Electricity: measuring and testing
Internal-combustion engine ignition system or device
Apparatus for coupling a measuring instrument to an ignition...
324 62, 324 73AT, 364551, F02P 1700
Patent
active
044019491
ABSTRACT:
An identification circuit for use in conjunction with an automobile engine analyzer system having a plurality of external probes is disclosed. The various probes and other external devices associated with the automobile engine analyzer each include a passive circuit element, typically a resistor. When the probe or other external device is connected to the analyzer, the passive circuit element completes the identification circuit within the analyzer. By applying a predetermined signal to the circuit, the particular probe or device connected may be identified by examining a particular circuit characteristic, such as the voltage drop across a second resistor of known resistance within the circuit.
REFERENCES:
patent: 3458806 (1969-07-01), Snow
patent: 3464001 (1969-08-01), Dodson
patent: 4270174 (1981-05-01), Karlin et al.
patent: 4337515 (1982-06-01), Kraft
FMC Corporation
Krawczewicz Stanley T.
Megley R. B.
Stanley H. M.
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