Terry D Cook

US Patent:

6356086, Mar 12, 2002

Filed:

Apr 12, 1999

Appl. No.:

09/289818

Inventors:

Terry D. Cook - Sioux Falls SD
Curt Hartse - Sioux Falls SD

Assignee:

Sencore, Inc. - SD

International Classification:

G01R 2726

US Classification:

324659

Abstract:

A test apparatus and method of testing a capacitor while it is still in-circuit incorporation a sequence of tests including a DC capacitance value measurement, a measurement of the DC current paths in parallel with the capacitor, a measurement of the equivalent series resistance of the capacitor, and an AC impedance measurement of the capacitor and its associated circuitry.

US Patent:

7443452, Oct 28, 2008

Filed:

Aug 9, 2005

Appl. No.:

11/199824

Inventors:

Terry D. Cook - Sioux Falls SD, US

Assignee:

Sencore, Inc. - Sioux Falls SD

International Classification:

H04N 3/27
H04N 5/46
H04N 5/44

US Classification:

348554, 348555, 348725

Abstract:

A single electronic device is disclosed that splits a transport stream in order to simultaneously produce NTSC and ATSC standard outputs with the same video and audio content so that the same content can be viewed side-by-side on a standard definition NTSC television and an ATSC digital HDTV set at the same time.

US Patent:

57173389, Feb 10, 1998

Filed:

Nov 7, 1995

Appl. No.:

8/554768

Inventors:

Terry D. Cook - Sioux Falls SD

Assignee:

Sencore, Inc. - Sioux Falls SD

International Classification:

G01R 3102
G01R 3106

US Classification:

324546

Abstract:

A method and apparatus for testing flyback transformers counts the number of cycles of a decaying ringing signal generated in a resonant circuit including the secondary winding of the flyback transformer beginning with the second cycle and ending with the cycle where the amplitude of the ringing signal falls below twenty-five percent of the amplitude of the second cycle of the ringing signal.

US Patent:

62769561, Aug 21, 2001

Filed:

Apr 12, 1999

Appl. No.:

9/289880

Inventors:

Terry D. Cook - Sioux Falls SD

Assignee:

Sencore, Inc. - SD

International Classification:

H01R 1118

US Classification:

439482

Abstract:

An insulative caliper type pivotal mounting pivotally secures two elongate arms that at their free ends mount a pair of electrically conductive pointed contacts. Electrical conductors connected to the contacts extend through each of the insulative elongate arms and through the elastic pivotal mounting from which they exit as a coaxial cable. On the distal end of the coaxial cable is positioned a quick connect-disconnect jack adapted for mounting onto a complementary jack in an electronic test instrument. The separation between the pointed ends of the contacts is infinitely adjustable by means of a thumb screw having reversed threaded studs extending from the opposed sides of the center thereof into threaded pivotal mountings on each of the elongate arms. The dual point test probe may be infinitely adjusted, maintained in the predetermined separation and may be manually manipulatable by the single hand of a user when testing current, voltage drop, capacitance, inductance or the like between the contact points.

US Patent:

46161732, Oct 7, 1986

Filed:

Mar 21, 1984

Appl. No.:

6/591875

Inventors:

Terry Cook - Sioux Falls SD
Timothy Graham - Hartford SD

Assignee:

Sencore, Inc. - Sioux Falls SD

International Classification:

G01R 2302

US Classification:

324 78D

Abstract:

A frequency counter employs a temperature sensitive oscillator mounted in proximity to a master crystal oscillator to provide an output frequency which varies appreciably with changes in ambient temperature and the frequency of the temperature sensitive oscillator is periodically counted and compared to a table of correction factors stored in memory to select a correction factor which is applied to the counted frequency of an input signal to provide a temperature corrected frequency count.

US Patent:

48251470, Apr 25, 1989

Filed:

Sep 14, 1988

Appl. No.:

7/244041

Inventors:

Terry D. Cook - Sioux Falls SD
Ross Ortman - Sioux Falls SD

Assignee:

Sencore, Inc. - Sioux Falls SD

International Classification:

G01R 2726

US Classification:

324 60C

Abstract:

A train of constant current pulses is applied to a capacitor to raise the voltage across the capacitor from a first predetermined level to a second predetermined level. The voltage across the capacitor is measured only during the intervals between the current pulses, and the number of applied pulses is counted and used to calculate the capacitance of the capacitor.

US Patent:

47959665, Jan 3, 1989

Filed:

May 2, 1986

Appl. No.:

6/858715

Inventors:

Terry D. Cook - Sioux Falls SD

Assignee:

Sencore, Inc. - Sioux Falls SD

International Classification:

G01R 2708
G01R 3112

US Classification:

324 60R

Abstract:

An instrument for measuring the equivalent series resistance of a capacitor includes a plurality of constant current generators across which a capacitor under test is adapted to be connected. A selected one of the generators is periodically enabled to supply a constant current to the capacitor and the voltage across the capacitor is measured and displayed a short time after the generator is enabled, after which time the capacitor is discharged and the measuring cycle is repeated.