Joseph A Marinko

US Patent:

45623864, Dec 31, 1985

Filed:

Jan 26, 1984

Appl. No.:

6/573903

Inventors:

Jerry K. Goff - Ambler PA
Joseph A. Marinko - Chalfont PA
Joseph G. Venditto - Perkasie PA
Donald A. Yost - Norristown PA

Assignee:

Performance Controls Company - Hatboro PA

International Classification:

H02P 602
H03K 522

US Classification:

318254

Abstract:

An apparatus for use with an amplifier regulates the current through a load according to a drive signal having first and second states and comprises switchless sensing means and polarity correction means. The switchless sensing means provides a sense signal continuously representative of the magnitude of the current through the load without the use of switching circuitry. The polarity correction means is directly coupled to the sensing means and receives the sense signal and is responsive to the status of the drive signal for providing an analog signal continuously representative of both the instantaneous magnitude and polarity of the current through the load.

US Patent:

43364845, Jun 22, 1982

Filed:

Jul 3, 1980

Appl. No.:

6/165960

Inventors:

Joseph A. Marinko - Ambler PA

Assignee:

Textron, Inc. - Providence RI

International Classification:

G05B 1940

US Classification:

318696

Abstract:

Solid state control devices are placed in series with each field winding of a step motor having a field for each of two phases. Each control device has a control terminal selectively permitting stepping drive current flow through the series field winding and gate means controlling each terminal. Sequence control means selects the sequence of application of control signals to respective gate means to determine the sequence and direction of drive. A timed current chopper means applies a timed signal to the gate means to determine when the control signal and what part thereof may be applied to the control electrode of the control device to control and adjust the drive effect. In this environment, sensing means is provided to determine when and how much current is flowing in a given field winding and to provide a signal to a comparator which is used in controlling the chopper. Various control circuits are provided for sensing and control in this environment.