Communications: electrical – Land vehicle alarms or indicators
Patent
1997-07-11
1999-05-04
Crosland, Donnie L.
Communications: electrical
Land vehicle alarms or indicators
340449, 340586, 340599, 340643, 340660, 340635, 340657, 361 79, 361 86, 324508, 324522, B60Q 100, G08B 2100
Patent
active
059008040
ABSTRACT:
A indicating power cord system including a housing and an elongated extension cord having a first end connected to the housing and a second end having a plug coupled thereto for being releasably inserted in a standard electrical receptacle to receive power therefrom. Next provided is an electrical outlet positioned on the housing for being electrically connected to a block heater of a vehicle. The electrical outlet is electrically connected to the extension cord with a relay contact and associated relay coil connected therebetween. The relay contact has a closed unbiased orientation upon the lack of receipt of current by the relay coil and an open biased orientation upon the receipt of current by the relay coil. Also included is a thermistor positioned on the heater block of the vehicle. The thermistor can be connected to the relay coil for providing current thereto upon the engine block reaching a predetermined temperature. Further provided is a power consumption level indicator for signalling the amount of power being delivered to the block heater of the vehicle, if any.
REFERENCES:
patent: 4583086 (1986-04-01), Andrews et al.
patent: 4924404 (1990-05-01), Reinke, Jr.
patent: 5315236 (1994-05-01), Lee
patent: 5525965 (1996-06-01), Liebenthal
patent: 5631565 (1997-05-01), Winter
patent: 5635895 (1997-06-01), Murr
patent: 5710691 (1998-01-01), Fowler et al.
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