John R Parks

US Patent:

40054071, Jan 25, 1977

Filed:

May 8, 1975

Appl. No.:

5/575855

Inventors:

John D. Parks - Lorton VA

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H03K 1318

US Classification:

340347AD

Abstract:

A conventional CRT is modified to include a vertical column of electrodes bedded in the face of the CRT. A single valued function is displayed on the CRT and the vertical and horizontal gains are adjusted to produce the desired sweep on the face of the CRT. The horizontal sweep is then disabled and the sweep is compressed to a single axis, coincident with the column of electrodes. The electron beam, corresponding to the plot, generates signals on the electrodes which are encoded to binary outputs. By continually decoding each three consecutive outputs, corresponding points of the plot are determined.

US Patent:

43674313, Jan 4, 1983

Filed:

Jul 15, 1980

Appl. No.:

6/169003

Inventors:

John D. Parks - Lorton VA

International Classification:

H01J 744
H01J 1734
H01J 2316
H01J 2996
H01K 162

US Classification:

315 38

Abstract:

The spark gap device disclosed herein comprises at least two sets of electrodes enclosed within a common chamber. A delay line is connected between successive sets of electrodes. An arc which develops across the first set of electrodes as a result of a voltage transient ionizes the gas in the chamber. The voltage transient is delayed by the time required to travel through the delay line. When the voltage transient arrives at the second set of electrodes, an arc develops in less time than was required at the first set of electrodes due to the fact that the gas in the chamber has been at least partially ionized.

US Patent:

40706923, Jan 24, 1978

Filed:

May 8, 1975

Appl. No.:

5/575894

Inventors:

John D. Parks - Lorton VA

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H04N 718

US Classification:

358107

Abstract:

A visual plot of a single valued function is rotated orthogonally and then iewed by a TV camera. The camera output is recorded on a video recorder and then played back to a digitizer. The digitizer horizontally scans the rotated plot and detects the time interval for each horizontal scan to intersect a respective point on the rotated plot. The intervals correspond to the amplitude of different points along the plot. The information derived may be stored for subsequent data processing.