NORMAN L CARROLL
Engineers in Bakerstown, PA
License number
Pennsylvania PE009051E
Category
Engineers
Type
Professional Engineer
Address
Address
Bakerstown, PA 15007
Professional information
Variable Capacitance
US Patent:
4914543, Apr 3, 1990
Filed:
Jul 20, 1989
Appl. No.:
7/382303
Inventors:
Norman L. Carroll - Bakerstown PA
Gregory A. Bertone - Monroeville PA
Willard L. Pearce - Allison Park PA
Gregory A. Bertone - Monroeville PA
Willard L. Pearce - Allison Park PA
International Classification:
H01G 512, H01G 402
US Classification:
361294
Abstract:
A variable area capacitance transducer for measurement of length and displacement is disclosed. The preferred embodiment uses three concentric cylinders. The innermost cylinder acts as a working electrode, the middle cylinder acts as a common electrode, and the outer cylinder, a reference electrode. A movable concentric cylinder acts as a shield and is guided for movement between the working and common electrodes. The capacitance of the transducer is related to the displacement of the shield.