Abstract: A gauge for cartridges is disclosed. The gauge includes a gauge body defining an opening, a window, and receiving space. The opening and the receiving space share an axis and are in direct communication with each other. The window is in direct communication with the receiving space. The opening and the window are separated by a body portion of the gauge. Each gauge has a receiving space that is sized and shaped to correspond to a predetermined cartridge.

Abstract: A measuring device for a telescopic handling arm, in which the telescopic handling arm includes at least two elements (1, 2) that are mounted to slide relative to each other, includes measuring elements for measuring the extension of the telescopic arm. The device further includes calculation elements (4) for calculating the extension of the movable portion (2) of the telescopic arm using the hydraulic characteristics of a hydraulic telescoping actuator (3), and the device further includes adjuster elements for adjusting the calculated movements via a signal transmitted by at least one element (5, 6) for contactless identification of the position of the movable portion (2) of the telescopic arm.

Abstract: An apparatus for measuring the internal diameter of a wellbore for a wireline formation sample taking instrument, including an hydraulically actuated probe and back up shoe for selective engagement with the wall of a wellbore, an hydraulic pump and selectively controllable valves for selectively controlling extension and retraction of the probe and back up shoe, and an hydraulic fluid reservoir to supply hydraulic fluid to the pump for extending and retracting the probe and back up shoe. The reservoir includes a pressure compensator for balancing the pressure in the reservoir to an hydrostatic pressure in the wellbore. A position sensor is coupled to the compensator to determine its position. The position of the compensator corresponding to the fluid volume in the reservoir, the extension distance of the probe and back up shoe, and the internal diameter of the wellbore at the location of the probe and back up shoe.

Abstract: The present invention relates to a spot welding inspecting apparatus for inspecting a weld between two metal plates which are subjected to spot welding without destroying the metal plates or weld. A pair of knife gauges having an interval therebetween larger than the diameter of the weld are inserted between the welded metal plates by a continuous impact of the hammer which is driven by a compressed air and pushed between the metal plates so as to clamp the weld. Thereafter, the piston is moved so that the knife gauges may approach the weld to indicate the distance between the knife gauges with the index.