David C Malcolm, 7149 Knollwood Ter, Clifton, NJ 07012

4979198, Dec 18, 1990

Jul 3, 1989

7/375124

David H. Malcolm - Randolph NJ
George P. T. Wilenius - Dunrobin, Ontario, CA

H05G 110

378102

Method and apparatus for the production of fluoroscopic and radiographic x-ray images utilizing a portable hand-held and battery operated x-ray system. The system incorporates a unique high voltage power supply of diminutive size and weight which may be disposed totally within the hand-held system. By utilizing the system in conjunction with a currently available hand operated instant Polaroid film developer, the system provides total portability and field operability in both fluoroscopic and radiographic mode.

4328940, May 11, 1982

Aug 9, 1978

5/932317

David H. Malcolm - West Paterson NJ

Electrogasdynamics, Inc. - East Hanover NJ

B64D 118

244136

A method of spraying electrically charged particulate material to ground from a low flying airplane. The method includes the steps of imposing an electrical charge of given polarity upon an emitted primary spray of particulate material of sufficient magnitude to electrostatically enhance the deposition thereof and concurrently emitting a secondary spray of oppositely charged particulate material of selective character from said airborne source at a charge level of a magnitude to avoid material degradation of the charge on said primary spray intermediate its loci of emission and deposition.

4508276, Apr 2, 1985

Sep 29, 1982

6/428024

David H. Malcolm - Randolph NJ

Titan Tool Inc. - Oakland NJ

B05B 500
H02H 300

239691

Electrostatic spray coating system wherein the output voltage is maintained constant over the working range of the system and wherein the power is automatically interrupted whenever the load current exceeds a predetermined amount, as for example, about 120 microamperes.

4290091, Sep 15, 1981

Jun 11, 1979

6/047372

David H. Malcolm - Randolph NJ

Speeflo Manufacturing Corporation - Houston TX

B05B 502

361228

An electrostatic spray gun apparatus for coating systems having an entirely self-contained light weight electrical power supply adapted to convert the kinetic energy available in a moving air stream into the required high d. c. potential and which dispenses with external electrical supply connections thereto.

4219865, Aug 26, 1980

Sep 5, 1978

5/939171

David H. Malcolm - Randolph NJ

Speeflo Manufacturing Corporation - Houston TX

B05B 502

361228

An improved energy converting and electric power generating system for electrostatic spray apparatus for coating systems adapted to convert the kinetic energy available in a moving air stream into electrical power.

4541844, Sep 17, 1985

Apr 30, 1984

6/605399

David H. Malcolm - Randolph NJ

B03C 316

55 10

Method and apparatus for the removal of particulate matter, fumes, mists and noxious gases from a gas stream utilizing selectively sized and electrically charged water droplets, preferably between 30 and 60 microns, that exhibit significantly enhanced affinity for smaller uncharged particles through dielectrophoretic attraction, said droplets being present in such relatively low concentration that performance is not limited by space charge. The charged droplets are caused to move relative to the gas stream by inertial or electrostatic means, or both, at such a velocity and path as to maximize encounters between charged droplets and the particles to be collected.

4619670, Oct 28, 1986

Sep 16, 1985

6/776760

David H. Malcolm - Randolph NJ
George P. T. Wilenius - Dunrobin, Ontario, CA

B03C 316

55107

Method and apparatus for the removal of particulate matter, fumes, mists and noxious gases from a gas stream utilizing selectively sized and electrically charged water droplets, preferably between 10 and 60 microns, that exhibit significantly enhanced affinity for smaller uncharged particles through dielectrophoretic attraction, said droplets being present in such relatively low concentration that performance is not limited by space charge. The charged droplets are caused to move relative to the gas stream by inertial and/or electrostatic means, at such a velocity and path as to maximize encounters between charged droplets and the particles to be collected.

4856036, Aug 8, 1989

Jun 20, 1988

7/224121

David H. Malcolm - Randolph NJ
George P. T. Wilenius - Dunrobin, CA

Xi Tech Inc. - Randolph NJ

H05G 158

378116

Method and apparatus for the production of fluoroscopic and radiographic x-ray images utilizing a portable hand-held and battery operated x-ray system. The system incorporates a unique high voltage power supply of diminutive size and weight which may be disposed totally within the hand-held system. By utilizing the system in conjunction with a currently available hand operated instant Polaroid film developer, the system provides total portability and field operability in both fluoroscopic and radiographic mode.