Communications: electrical – Selective – Interrogation response
Patent
1976-05-20
1977-08-09
Wilbur, Maynard R.
Communications: electrical
Selective
Interrogation response
179111E, 340 8R, G01V 116
Patent
active
040414469
ABSTRACT:
The transducer functions as a capacitor to sense variations in inter-plate istances produced either by transducer displacement or by pressure. The capacitor plates include flexible rubber sheathing members having interior conductive surfaces spaced slightly from a conductive centrally-disposed metal plate. A pair of electrets are disposed one between each rubber surface and the central metal plate. Electrets are a battery replacement supplying a large electrostatic field. Opposite polarization of the electrets provides push-pull and directional capabilities. Like polarities, or the omission of one electrode, provide responsiveness both to pressure and to displacement. The central metal plate has sufficient mass to remain substantially stationary relative to the flexible movements of the rubber sheathing. Variations in the plate spacings produces variations in the capacitor output.
REFERENCES:
patent: 3821491 (1974-06-01), Whetstone et al.
patent: 3851183 (1974-11-01), Lewiner et al.
patent: 3963881 (1976-06-01), Fraim et al.
patent: 3978446 (1976-08-01), Miller
patent: 3980838 (1976-09-01), Yakushiji et al.
Blum T. M.
Critchlow Paul N.
Sciascia Richard S.
The United States of America as represented by the Secretary of
Wilbur Maynard R.
LandOfFree
Capacitive-type displacement and pressure sensitive transducer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Capacitive-type displacement and pressure sensitive transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Capacitive-type displacement and pressure sensitive transducer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1231565