Inductor devices – Relatively movable coils
Patent
1982-09-29
1984-07-31
Tolin, G. P.
Inductor devices
Relatively movable coils
336123, H01F 2104
Patent
active
044633335
ABSTRACT:
A position-measuring transformer having a pair of confronting relatively movable supports (12, 14) upon the confronting faces (16, 18) of which lie patterns of conductors is disclosed (26, 50). The conductors (26, 50) on the respective supports (12, 14) are dimensioned, configured, and positioned in such a way that portions of the conductors of one support confront portions of the conductors of the other support. When the conductors of one support are energized, a coupling effect is produced in the conductors of the other support. This coupling effect varies as a function of the relative position of the conductors, i.e., the relative position of the support. The energized conductors comprise a pattern of strip-like conductors (30, 88, 116) placed side by side. The conductors in which the coupling effect is produced are of two configurations. The "fine data" pattern comprises strip-like conductors (116) placed side by side in a pattern similar to that of the energized conductors (30). The resultant coupling effect varies substantially sinusoidally and provides a "fine" measurement of the relative position of the coupled strip-like conductors. The "coarse data" pattern comprises conductors (88) which confront the energized conductors (30) along a portion (128) of the energized conductors, the length of this portion (128) varying monotonically as a function of the relative position of the supports. The outputs of the "fine data" and "coarse data" conductors are combined to provide a highly precise measurement of the relative position of the supports (12, 14).
REFERENCES:
patent: 2799835 (1957-07-01), Tripp et al.
patent: 2867783 (1959-01-01), Childs
patent: 3148347 (1964-09-01), Morrison
patent: 3264588 (1966-08-01), Winget
Farrand Industries, Inc.
Steward Susan
Tolin G. P.
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