F - Mech Eng,Light,Heat,Weapons – 24 – C
Patent
F - Mech Eng,Light,Heat,Weapons
24
C
327/2.51
F24C 7/02 (2006.01) G01K 1/02 (2006.01) G01K 7/32 (2006.01) H05B 6/68 (2006.01) H05B 6/80 (2006.01)
Patent
CA 1108243
ABSTRACT OF THE DISCLOSURE In a wireless temperature sensing assembly for use in a cooling apparatus including microwave ovens, there is described an improved wireless communication element and sensing probe wherein the sensing probe, whose elements combine to form an LC resonance circuit, is activatable by an external signal and need not therefore contain its own source of primary power. Known cordless probes require a power source within the probe resulting in bulkier, costlier and more complex probes than the one presently described. In this invention, a temperature sensing probe comprises a temperature sensitive oscillator which produces a resonance frequency which varies with sensed tempera- ture, and an antenna system for detecting an activating frequency which corresponds to the resonance frequency of the resonance circuit and which also serves to transmit to a receiver a signal, the frequency of which is dependent upon the sensed temperatures and which corresponds to the resonance frequency of the oscillator.
334753
Kawabata Kenji
Kumagai Yoshimi
Yamaguchi Masumi
G. Ronald Bell & Associates
Sharp Kabushiki Kaisha
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