Fixture to Measure Shorted Turn Quality
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Fixture 10 comprises electrical coil 12 wound on core 14. Coil 12 is connected with LCR meter 16 so that the inductance of coil 12 can be measured using meter 16 with and without the presence of part 18 on fixture 10. The inductance of coil 12 with part 18 on the fixture is a measure of the dimensions of part 18 and its electrical conductivity which, in turn, is a measure of its hardness. Core 14 is of metal and has a pair of opposite end flanges 20 and 22. Coil 12 is wound on core 14 between flanges 20 and 22. Coil 12 may consist of about 300 turns of two layers of about 150 turns each and terminating at notch 24 with leads 26 and 28 by means of which coil 12 is connected with meter 16. Core 14 is fixed on base 30, and tubular support ring 32 is disposed on top of base 30.