Apparatus for and method for testing the number of turns on a coil
AssigneeH. Tinsley & Co. Ltd.
InventorsRonald Frederick Spurr, Colin Alan Boardman, John D. Yewen
Life of this patent
Estimating the term…
Abstract
Apparatus and method for testing the number of turns on a coil by magnetically energizing a rod through an energizing coil and with compensating coils modifying the flux about the rod to provide a space in which the flux is substantially uniform and within which space is placed the coil to be tested.
Claims20
Apparatus for testing the number of turns on a coil comprising a rod capable of being magnetically energized, an energizing coil wound on the rod and connected to magnetically energize the rod to generate flux, at least two compensating coil means coaxially spaced axially along the rod and adapted to be energized to modify the flux in the sense to provide between the compensating coil means and about the rod a space in which the flux is substantially uniform, and support means about the rod for supporting within said space a coil to be tested.
A method of testing the number of turns on a coil which comprises magnetically energizing a rod to generate flux and modifying the generated flux by simultaneously generating compensating flux from axially spaced locations along the rod to provide a space about the rod in which the flux is substantially uniform, the space being of reducing circular cross-section in the direction of the rod axis and deriving a measure of the voltage induced in a coil under test located within said space.
Dependencies are inferred from the claim text.