Communications: electrical – Selective – Having indication or alarm
Patent
1977-11-11
1979-11-13
Waring, Alvin H.
Communications: electrical
Selective
Having indication or alarm
200 6125, 343 65SS, 731465, B60C 2302
Patent
active
041745159
ABSTRACT:
A device for transmission at least of one measurement value from a moveable object to an object stationary relative to the latter, particularly from a motor vehicle wheel to the vehicle frame of a motor vehicle, with a transmission stage and a receiving stage, which both are secured on the stationary object, and a coupling element which is secured on the moveable object and via which the receiver is able to be applied with a measuring value signal; characterized in the manner that a transmission stage transmits two transmission signals of different frequencies. At least one coupling element mixes the two frequencies and a receiving stage is responsive to at least one signal with a mixing frequency, which signal is transmitted by the coupling element.
REFERENCES:
patent: 3806905 (1974-04-01), Strenglein
patent: 3911434 (1975-10-01), Cook
Farber Martin A.
VDO Adolf Schindling AG
Waring Alvin H.
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