Abstract: An accurate, portable skate blade gauge comprises an extruded body having a blade-receiving recess, a clamping screw for pressing the blade against a side wall of the recess, and a pivoted indicator arm having a base near the pivot for engagement with the blade edge, and a pointer remote from the pivot for indicating squareness of the blade. The pivot is a resilient pin of spring metal disposed in a hole in the gauge body and fixed to the bottom of the hole. A clearance between the pin and the wall of the hole allows the pin to flex when the skate blade is pressed against the base of the indicator. The resilience of the pin ensures that the blade remains in firm contact with the base of the indicator arm to achieve precise and accurate measurements.

Abstract: Tissue is examined with a device that includes one or more transducer elements, each of which generates a signal in response to force imposed on the transducer element in accordance with varying properties of an underlying tissue structure as the transducer element is pressed against and moved over the tissue. The tissue examination device further includes circuitry for detecting a variation in the signals as an indication of a composition of the underlying tissue structure.