Abstract: A fixture for securely holding a member such as a knife against a grinding element such as a grinding wheel during a grinding operation. The fixture includes a blank (knife) support assembly rigidly secured to the upper plate which is slidably supported on a lower plate which is rigidly attached to the grinding device. An adjusting mechanism is interconnected between the upper and lower plate for the slidable movement of the upper plate on the lower plate to retain the blank (knife) support assembly, and thus the knife edge, against the grinding device during the grinding operation.

Abstract: An improved hanger for resiliently supporting delicate instrumentation charactrized by an elongated elastic body, having omnidirectional rigidity, adapted to be supported at each of its opposite ends and connected in supporting relation with a mounting block disposed midway between the opposite ends thereof. The body includes a plurality of mutually spaced flexure plates disposed in substantially parallel planes and interconnected through a plurality of abaxially aligned flexure pins spaced in sequential helical progression about a common axis normally related to said planes for serially interconnecting the plates for imparting a predetermined coefficient of elasticity to the body.