An aircraft fuel quantity gauging system has a number of probes within a tank to measure the height of fuel at different locations. Each probe includes a still well and an ultrasonic transducer mounted at the top and bottom of the still well. The lower transducer transmits pulses of acoustic energy upwardly through the fuel to its surface and measures the time of travel back of the reflected pulse back to the transducer. This is used to derive a first, bottom-up measure of fuel height. Similarly...

An aircraft fuel-gauging system has flowmeters at the inlet and outlet of a fuel tank. The output of the flowmeters is used to compute the height and volume either of a localised elevated region above the inlet, where fuel flows into the tank, or of a localised depressed region above the outlet where fuel flows out of the tank. Where the gauging probes are located away from the region of the inlet or outlet, the volume derived from the probes is corrected by adding the volume of the elevated reg...

A gauging system is disclosed. The gauging system is adapted to determine the dimensions of an elongate workpiece. A movement assembly is provided for effecting relative longitudinal movement between the gauging device and the elongate workpiece so that the gauging device can repeatedly detect the diameter of the workpiece relative to reference positions along the length of the workpiece. This enables the profile of the workpiece to be accurately determined. The gauging device may comprise a las...

Apparatus for gauging physical dimensions of solid or tubular bodies. Apparatus comprises a capacitive transducer having electrodes forming diametrically arranged pairs of capacitors and means for connecting the pairs, preferably sequentially, in an arm of a four arm electrical network. For circumferential scanning of a solid body along its length, the body is moved along a path of travel through a head assembly including the transducer with the axis of the body being coincident with the axis of...

An improved measuring and gauging instrument is provided for determining concentricity, out of roundness, flatness, diameters, thickness, and the like dimensions, of a workpiece for checking or comparing the accuracy of the workpiece. The instrument includes a stand or frame having a bar upon which is mounted one or more V-blocks, or mounting blocks, with each V-block having a fixedly mounted indicator dial and each mounting block having a floatingly mounted gauge. The fixedly indicator dial is ...

A gauging assembly adapted for use in positioning stock material with respect to fixed equipment. The assembly includes an elongated retainer having a predetermined arrangement of stop positions thereon. An elongated holder is provided for slidable coupling with the retainer and permitting reciprocal relative longitudinal movement therebetween. At least one stop block is provided and has a plurality of material engaging faces. The block is rotatable to expose each face in sequence for engagement...

Apparatus for measuring the angular offset of one portion of a structure relative to another portion of the structure includes two displacement-sensitive transducers disposed so as to sense the positions of two points on the structure; a third displacement-sensitive transducer disposed so as to sense the position of another point on the structure; a first comparator for computing the difference between the outputs of the first two transducers; a second comparator for computing the difference bet...

A pin is formed with an axial bore at the bottom end for receiving compressed air and containing a diffuser. This bored end has a portion of progressively increasing cross section toward the end. A pair of axially spaced diametrical openings in space quadrature intersect the axial bore. A bumper with a resilient face may be urged toward the pin when an air switch is open. A source of compressed air is coupled to the pneumatic cylinder through an air switch and to sample and reference conduits th...

A gauging system comprising a first rotatable table, a second rotatable table mounted for rotation about an angle of 45.degree. with respect to a rotational axis of said first table, with means for rotating the respective tables, means for mounting an object to be gauged on said second table, and indicating means for sensing variation in wall positions of said object from a central axis or point.

A gauging tool for use in mounting the rails of a drawer pull-out guide assembly to furniture side walls includes a holding member for supporting the body rail. The body rail can be screwed onto the furniture side wall while held by the holding member of the gauging tool.