Paul E Shepherd

US Patent:

45720215, Feb 25, 1986

Filed:

Oct 3, 1984

Appl. No.:

6/657170

Inventors:

Joseph Guarracini - Lawrenceville NJ
Paul E. Shepherd - Lambertville NJ
Robert W. McQuade - Princeton NJ

Assignee:

RCA Corporation - Princeton NJ

International Classification:

G05G 1100
F16D 306
F16B 710

US Classification:

74479

Abstract:

An electron microscope stage is manually movable in three orthogonal axial directions and two orthogonal rotational directions by corresponding motion transmission systems. Four of the transmission systems employ telescopic rods and a connecting pin having three resilient independently compressible sections. The pin transmits torques from one rod to the other about their longitudinal axes. One section is resiliently secured to an aperture in the inner rod, the other sections are resiliently secured to mating axial slots in the outer rod to permit relative axial displacement of the rods. The independent resilient compression of each section compensates for wear or differences in dimensions between mating surfaces while maintaining tight resilient torque coupling without backlash between the pin and the rods.