Method of winding an electrical coil as successive oblique layers of coil turns
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United States of America Patent
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-
Apr 26, 1994
Grant Date -
N/A
app pub date -
Jun 12, 1992
filing date -
Jun 14, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electrical coil is created by winding an electrical coil as successive parallel oblique layers of coil turns projecting radially outwardly from a coil former about which the coil turns are wound with the coil turns positioned radially outward of the coil former axis. The winding forms in radial cross-section, a triangle having a base situated against the coil former, a second side constituting an oblique rising edge and a third oppositely oblique side. Alternately upward and downward oblique coil turn layers are successively wound to advance the coil progressively along the axis of the former. To effect a connection to an adjustment tap on a turn n which in normal winding would not be on the radially outer layer of coil turns extending parallel to the winding axis but rather buried within the coil, such succeeding coil turn n of either the downwardly oblique coil turn winding layer or upward oblique coil turn winding layer extending parallel to the third side of the trapezium is left free, and the turn n which would be normally buried in the coil is placed in the last coil turn space of the next upwardly oblique coil turn layer on the outer periphery of the electrical coil to properly position its adjustment tap.
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