G - Physics – 08 – C
Patent
G - Physics
08
C
354/77, 340/136.
G08C 19/16 (2006.01) H03M 1/00 (2006.01)
Patent
CA 1103357
45,809 A METER DIAL ENCODER FOR REMOTE METER READING ABSTRACT OF THE DISCLOSURE A meter dial encoder for converting angular dial pointer shaft positions includes a single track code pattern having binary coded arcuate sectors rotated by the shaft. The pattern is rotated adjacent a pattern sensing assembly including a single circular row of sensing positions having associated sensors for producing a multiple bit binary code signal, The code signal is changed by only one bit for each arcuate pattern movement equal to one arcuate sector. Each shaft position is converted from a corresponding dial read- ing to a binary code signal having error checking capabi- lity. In one preferred form of the invention, an opto- electronic encoder includes a single illuminating source and a light guide arrangement to produce plural point light sources for each of plural light responsive sensors asso- ciated with each of the sensing positions. An alternative light guide arrangement optically couples each of the sens- ing positions to light sensors. In a further preferred form of the invention, a code pattern is a magnetic field con- trolling material and is rotated adjacent a magnetic sensor for producing the shaft position binary code signal,
268871
Mcconnell And Fox
Westinghouse Electric Corporation
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