Michael D Levin

US Patent:

54028345, Apr 4, 1995

Filed:

Nov 25, 1992

Appl. No.:

7/981456

Inventors:

Michael D. Levin - Franklin Park NJ
William F. Richardson - Somerset NJ
Alan B. Todtenkopf - Bridgewater NJ

Assignee:

Merck & Co., Inc. - Rahway NJ

International Classification:

B65B 130
B65B 326

US Classification:

141 83

Abstract:

Solutions are prepared by accurately dispensing and weighing concentrated solutions of salts, acids and bases as well as water or organic solvent, and mixing to achieve homogeneity. The final solution may be stored or used directly from the system.

US Patent:

50513290, Sep 24, 1991

Filed:

Dec 19, 1989

Appl. No.:

7/452994

Inventors:

Edward B. Caruthers - West Chester PA
Michael L. Levin - Downingtown PA
Catharine E. Looney - Centerville DE
Steven P. Schmidt - Chester Springs PA
Dana S. Smith - Wilmington DE

Assignee:

DXImaging - Lionville PA

International Classification:

G03G 1310

US Classification:

430100

Abstract:

Process for reversal development of a latent electrostatic image in a layer on a conductive support by developing with an electrostatic developer having electrostatically charged toner particles by (a) generating imagewise areas in the layer having different rates of charge decay and/or charge acceptance, (b) charging the layer, (c) allowing formation of an electrostatic image corresponding to the imagewise generated areas by differential charge decay and/or charge acceptance, (d) creating an electrical field to attract toner particles preferentially to the areas of lesser charge, and (e) developing the areas of lesser charge with electrostatically charged toner particles having the same polarity as that of the charged layer. The developed image can be transferred to a receptor surface, e. g. , paper. The process is useful with many type photosensitive masters in preparing reversal images with the use of only one master, toner and film original.

US Patent:

53277902, Jul 12, 1994

Filed:

Jun 19, 1992

Appl. No.:

7/900663

Inventors:

Michael Levin - Franklin Park NJ
J. Kenneth Salisbury - Cambridge MA

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G01L 302

US Classification:

73862325

Abstract:

A reaction torque actuator has a sensor operatively coupled between a motor housing and an outer housing. A pair of bearings support the motor within the outer housing in a spaced, concentric relationship. The bearings allow a mutual angular displacement of the housing about the axis of rotation of the output shaft of the motor, but they isolate the sensor from the axial and radial moments. A resolver surrounds the shaft at its output end to produce a signal that accurately measures the angular position of the shaft. A controller regulates power to the motor windings as a function of signals from the resolver and the sensor and torque commands. In a preferred form for use in robotics where very accurate force control is desired, the motor: is a brushless D. C. motor, the sensor is of the strain gauge type, and the controller uses high quality amplifiers, sine wave commutation, cable shielding, and filtering to limit the noise generated by electronic switching.