Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1985-11-13
1987-06-30
LaRoche, Eugene R.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
68 231, G01C 1902
Patent
active
046772910
ABSTRACT:
A laundry appliance includes apparatus for analyzing the eccentricity of a rotatable member with respect to its design rotational axis when subjected to dynamic unbalance forces. An indicator is rotatable with the rotatable member and includes a predetermined detectable pattern. A sensor is juxtaposed to the detectable pattern and is spaced a predetermined radial distance from the design rotational axis of the rotatable member and indicator. The sensor is cooperable with the detectable pattern for producing an electrical signal corresponding to passage of the detectable pattern during rotary movement of the indicator to generate a stream of electrical signals representing the relative degree of radial displacement of the rotatable member from the design rotational axis. Control apparatus includes a microcontroller in circuit association with the sensor. The microcontroller is operable for receiving and analyzing the stream of electrical signals from the sensor for determining the radial displacement of the rotatable member from the design rotational axis by analyzing changes in the stream of electrical signals.
REFERENCES:
patent: 3585877 (1971-06-01), Kass
patent: 4321580 (1982-03-01), Deleris
patent: 4339959 (1982-07-01), Klaus, Jr. et al.
patent: 4342025 (1982-07-01), Spalti et al.
patent: 4445087 (1984-04-01), Mehnert
LaRoche Eugene R.
Mottola Steven J.
The Maytag Company
Ward Richard L.
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