H - Electricity – 01 – C
Patent
H - Electricity
01
C
338/14
H01C 10/30 (2006.01) H01C 10/18 (2006.01) H01C 10/34 (2006.01)
Patent
CA 1133084
VERNIER CONTROL Abstract of the Disclosure A vernier control (10) with independent coarse and fine adjustments includes a track pattern (17) that is formed along three concentric rings on a single base (11). A horseshoe-shaped, low-resistance track (17a) extends around a segment of the inner ring and has a pair of termination tracks (17d, 17e) connected to its oppo- site ends and extending in reverse directions in opposite half-sections of the intermediate ring. A pair of high- resistance tracks (17b, 17c) are formed in opposite half-sections of the outer ring, each extending alongside a respective termination track (17d, 17e). A fine ad- justment rotor (16) is journaled in the base (11) in the center of the track pattern (17), and carries a fine adjustment contact (15) that engages both a collector terminal (19) on the base (11) and the low-resistance track (17a). An annular contact carrier (12) is mounted for rotation around the rotor (16) and carries a pair of coarse adjustment contacts (13). Each coarse adjustment contact (13) electrically connects one of the termination tracks (17d, 17e) to its adjacent high-resistance track (17b, 17c). A control of this type may be employed in television sets for brightness, color and contrast ad- justments.
334773
Bulgrin Robert W.
Moffitt Jerry T.
Allen-Bradley Company Inc.
Fetherstonhaugh & Co.
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