Kenneth C Stark

US Patent:

52332470, Aug 3, 1993

Filed:

Jul 16, 1991

Appl. No.:

7/730620

Inventors:

Kenneth W. Stark - Adelphi MD

Assignee:

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

International Classification:

H02K 710
H02K 3722
H02K 3724
F16D 304

US Classification:

310 83

Abstract:

A method and device for precisely driving a rotary object includes a motor ounted in a housing and a reduction device comprising first and second harmonic drives, which connect the motor to the object to be driven via an output shaft. The output shaft is connected to the object to be driven via an adapter cup and a bellows which is stiff in torsion but which tolerates misalignments between the drive device and the object. All elements are designed to maximize stiffness and precision and to minimize backlash while maintaining maximum concentricity between the elements.

US Patent:

51776448, Jan 5, 1993

Filed:

Apr 3, 1991

Appl. No.:

7/679904

Inventors:

Kenneth W. Stark - Adelphi MD

Assignee:

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

International Classification:

G02B 2700
A47G 124

US Classification:

359896

Abstract:

A tilt mechanism includes a rigid base member, a first tilt plate pivotally ounted on the base member, and a second tilt plate pivotally mounted on the first tilt plate. The first and second tilt plates are pivoted via actuating mechanisms which include stepper motors, harmonic drives, and precision nuts which translate the rotational output of the harmonic drives to pivotal motion of the tilt plates. All of the movable components of the mechanism are mounted to one another via flexural pivots which allow at least limited rotation in one direction but which prevent movement in all other directions.