Michael R Harper

Address:

2765 S Jackson St, Denver, CO 80210

VIN:

JHLRE48757C019639

Make:

HONDA

Model:

CR-V

Year:

2007

Address:

13850 E Marina Dr APT 606, Aurora, CO 80014

VIN:

4A3AL35T97E013064

Make:

MITSUBISHI

Model:

ECLIPSE SPYDER

Year:

2007

US Patent:

51326027, Jul 21, 1992

Filed:

Oct 2, 1990

Appl. No.:

7/594859

Inventors:

Gary C. Jorgensen - Phoenix AZ
Michael D. Harper - Phoenix AZ

Assignee:

Calsonic International, Inc. - Irvine CA

International Classification:

G05B 102

US Classification:

318608

Abstract:

A method and apparatus for accurately and reliably positioning an actuator arm (12) is disclosed. The actuator arm (12) is driven by a conventional DC motor (38). The conductors which supply current to the motor (38) serve as primary windings (60) of a current transformer (58). The signal induced on secondary windings (62) of the transformer (58) responds to fluctuations in average current flowing in the motor (38). These fluctuations are amplified (64) and filtered (66) so that an AC burst (68) is produced in response to each commutation of the motor (38). The AC burst (68) triggers a one-shot timing circuit (72), which generates a pulse that remains active until the AC burst (68) has decayed. The pulse disappears prior to a subsequent commutation of the motor (38). Thus, one pulse is generated for each commutation of motor (38).