Communications: electrical – Selective – Having indication or alarm
Patent
1986-03-07
1987-11-03
Ruehl, Charles A.
Communications: electrical
Selective
Having indication or alarm
340 52F, 123196S, 123198D, G08B 2100
Patent
active
047045981
ABSTRACT:
An alarm system for a two-cycle internal combustion engine having a lubricating oil pump and an alternator generating electric pulses at a frequency related to engine speed. An integrated circuit configured as a counter has an input connected to receive the alternator pulses. A pressure switch generates an electric signal in response to the oil pressure increase in the pump output each time the pump operates. The integrated circuit has a first output which changes logic state in response to a predetermined count and has a second output which changes value at a frequency related to engine speed. The signal generated by the pressure switch is connected to a reset input to the integrated circuit so the counter is reset to zero in response to each oil pressure signal. An SCR switch controls operation of an alarm horn. A control connected to the integrated circuit and to the SCR operates the horn at a frequency related to engine speed. The control includes a flip-flop circuit connected to an IC output which changes logic at a given count. The control also includes a gate which is connected to a second IC output and is enabled by operation of the flip-flop. In one embodiment, the electric pulses, which are applied to the integrated circuit counter, are derived from pressure variations in fuel supplied to the engine by a fuel pump.
REFERENCES:
patent: 2582483 (1952-01-01), Hallerberg
patent: 2715723 (1955-08-01), Webster
patent: 3723964 (1973-03-01), Lace
patent: 4021794 (1977-05-01), Carlson
patent: 4059087 (1977-11-01), Tanigami et al.
patent: 4369743 (1983-01-01), Holt
patent: 4413248 (1983-11-01), Staerzl
patent: 4445470 (1984-05-01), Chmielewski
Outboard Marine Corporation
Ruehl Charles A.
Tumm Brian R.
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