Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Patent
1991-02-06
1993-04-20
Shoop, Jr., William M.
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
36416701, 341 16, G05B 1929
Patent
active
052046001
ABSTRACT:
An apparatus and method for simulating a mechanical detent in a manually operable rotary digital encoder typically used to control a display or readout in an associated electronic system. The output from the encoder to the electronic system is suspended for a predetermined time when the encoder shaft is rotated past a predetermined preset point. While the encoder output is suspended, the output signal V.sub.o to the electronic system is set at a level indicative of the preset point. The system user is thus able to quickly locate the preset point without overshooting it. If the user does, in fact, want to adjust the encoder past the preset point, the delay is of such a duration that it will have expired by the time the user repositions his hand on the encoder knob, thus allowing adjustment of the encoder to continue beyond the preset point.
REFERENCES:
patent: 4588936 (1986-05-01), Itoh et al.
patent: 4611269 (1986-08-01), Suzuki et al.
patent: 4628499 (1986-12-01), Hammett
Hewlett--Packard Company
Martin David
Shoop Jr. William M.
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