Abstract: An automatically-resetting force-sensing probe for obtaining a standarized depth measurement of a periodontal pocket which automatically resets after the measurement, and which indicates the level of force exerted by the periodontal tissue at the floor of the pocket upon the probe while the depth measurement of the pocket is taken. A related method of operation is also described.

Abstract: A copier's corona assembly carries arms holding a corona emission wire between a tensioning spring and current limiting resistor. Slugs secure the corona wire to the spring and resistor under tension provided by the arms and the spring while, simultaneously, facilitating a current path through the wire assembly formed by the wire, spring, resistor, and slugs. The slugs, made of a deformable metal receive, in a slot, a corona wire and one lead of the resistor or one end of the spring. A press closes the slot and crimps the slug closed to securely fasten together the wire and the lead or end.

Abstract: A corona wire, either directly or through an auxiliary element, engages the spiral thread of a screw-like stub member mounted on the housing of a corona charging apparatus to provide a simple, low cost and easily assembled corona wire adjuster. The stub member is mounted on the housing such that it may be rotationally driven much like a screw, but, unlike a screw, will not move into or out of the housing as it is rotated. Rotation of the stub member causes the corona wire to move in a direction parallel to the stub member axis in response to the thread engagement and thereby change its position relative to a photoconductor surface.