Electricity: motive power systems – Positional servo systems – Antibacklash systems
Reexamination Certificate
2007-04-24
2007-04-24
Leykin, Rita (Department: 2837)
Electricity: motive power systems
Positional servo systems
Antibacklash systems
C318S560000, C101S171000, C101S115000, C101S134000, C101S135000, C101S151000, C074S409000, C074S440000
Reexamination Certificate
active
11039352
ABSTRACT:
A controller for motor activation providing accurate and repeatable position changes by pressing and releasing a push button switch. Repeatable position changes are made in an advance direction by triggering a digital counter for a predetermined number of cycles of a reference clock signal. Backlash in retard motion of the motor is reduced by similarly asserting a retard motor input for an amount of time determined by another digital counter with a following advance correction made automatically after the retard signal is applied, by applying a predetermined retard-advance movement amount, as again counted by a digital counter. The advance binary amount, the retard binary amount and the retard-advance binary amount of set through binary switch inputs to respective counters to count the respective time periods (TG3, TG1, and TG2).
REFERENCES:
patent: 3552308 (1971-01-01), Minehart
patent: 3570735 (1971-03-01), Kurz
patent: 3594552 (1971-07-01), Adamson et al.
patent: 3701464 (1972-10-01), Crum
patent: 3717092 (1973-02-01), Crum
patent: 4528630 (1985-07-01), Sargent
patent: 5570633 (1996-11-01), Schultz et al.
Hamilton Brook Smith & Reynolds P.C.
Leykin Rita
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