Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2005-11-08
2005-11-08
Allen, Stephone B. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S231140, C341S013000
Reexamination Certificate
active
06963064
ABSTRACT:
In order to provide multiple resolution capabilities in an encoder device with the fewest number of parts, a single circuit board platform is provided with multiple chip buses electrically connected in parallel. Each bus is located adjacent a different code disc track wherein the code disc includes multiple concentric tracks of different resolution. The chip buses are compatible with either a surface mounted or a plug-in mounted encoder module assembled to a printed circuit board platform having alternate disc track read locations provided by separate encoder module bus ports. To change resolution the encoder module chip is simply moved from one bus to an alternate resolution bus on the PC board that lies adjacent a different code disc resolution track. In one embodiment, the PC board is mounted to the housing and the electric motor and the code disc is mounted on the rotary motor shaft in order to provide shaft angle position for electrically controlling the operation of the motor.
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Allen Stephone B.
Gore Gregory J.
PEM Management, Inc.
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