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US 4,521,722 AGranted
Appliance controller
AssigneeThe Singer Company
InventorsRichard C. Barthel, Richard D. Roy
Life of this patent
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Abstract
A microcomputer-based electronic controller for a dishwasher utilizes a motor driven timing cam for selectively energizing the electromechanical components of the dishwater. An internal diagnostic routine in the microcomputer insures that the timing cam is advanced when the microcomputer calls for power to be applied to the motor.
Claims4
A controller for an appliance having a plurality of selectively energizeable electromechanical components, comprising:
- input means for operator selection of a desired cycle of operation of said appliance;
- a motor;
- switching means coupled to be driven by said motor and having a plurality of timing cams on a rotating member for controlling the operation of a plurality of switches for applying power to energize said components;
- and
- sequencing means for selectively advancing said switching means including:
- means for applying power to said motor;
- means on said rotating member for defining incremental positions around said rotating member;
- means for detecting movement of said rotating member from one of said positions to the next adjacent position;
- means separate from said rotating member and reponsive to the selected operation cycle for defining a program for said rotating member which includes a series of operting steps each including a number of incremental positions to be moved and a time delay of operation;
- and
- means for operating said power applying means to move said rotating member a defined number of incremental positions in accordance with said program.
8 more elements
Dependencies are inferred from the claim text.