Electricity: electrical systems and devices – Electrostatic capacitors – Variable
Patent
1987-10-01
1988-06-07
Griffin, Donald A.
Electricity: electrical systems and devices
Electrostatic capacitors
Variable
177210C, H01G 700, G01G 314
Patent
active
047500824
ABSTRACT:
Two spaced-apart outer elements are adapted to be excited by an oscillator. An inner element is disposed therebetween and provides a signal indicative of its spacing relative to the other elements. The signal is processed to determine this position. The elements are arranged on a flexure that is responsive to a load to form a load cell wherein the signal from the inner element is indicative of the magnitude of the load. Various flexure arrangements are disclosed. The elements are preferably parallel plates, having a surface area substantially greater than their separation. In an embodiment of the invention, the inner plate is bifurcated longitudinally, forming two nominally-coplanar inner plates, to offset the effects of off center loading on the flexure with respect to the output of the load cell.
REFERENCES:
patent: 2547780 (1951-04-01), Reynst
patent: 3566222 (1971-02-01), Wolfendale
patent: 3702957 (1972-11-01), Wolfendale
patent: 4237989 (1980-12-01), Lewis
patent: 4294321 (1981-10-01), Wittlinger et al.
patent: 4308929 (1982-01-01), Estavoyer
patent: 4461363 (1984-07-01), Loy
patent: 4523474 (1985-06-01), Browne et al.
patent: 4524840 (1985-06-01), Stuart
patent: 4558600 (1985-12-01), Lee
patent: 4561038 (1985-12-01), Hatton et al.
patent: 4572006 (1986-02-01), Wolfendale
patent: 4629019 (1986-12-01), Harrington et al.
patent: 4656871 (1987-04-01), Czarnocki
patent: 4661768 (1987-04-01), Carusillo
patent: 4679643 (1987-07-01), Bove
patent: 4683754 (1987-08-01), Hirata et al.
Capacitive Transducers (Foldvari et al.) Instruments & Coated Systems, Nov. 1964, vol. 37, pp. 77 to 85.
Griffin Donald A.
Linden Gerald E.
Pitchenik David E.
Pitney Bowes Inc.
Scolnick Melvin J.
LandOfFree
Capacitive ratiometric load cell 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 ratiometric load cell, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Capacitive ratiometric load cell will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-848160