Abstract: An automated eddy current fastener hole inspection apparatus and method for providing an automatic indication of the presence of a crack in structural members. The device automatically advances the probe of an eddy current instrument in a hole in the structural member, induces an eddy current, detects the eddy current signal produced by the eddy current instrument, digitizes the eddy current signal, analyzes the digitized signal for the presence of a characteristic signature corresponding to the effect of a crack in the structural member upon the eddy current signal, and alerts the operator of the presence of a crack or of noise conditions in the eddy current signal which may mask the presence of a crack. The device is responsive to contiguous repetitions of the characteristic signature of a crack within predetermined time windows to distinguish between data corresponding to a bona fide crack in the structural member from data produced by the effect of noise, dirt, grease, etc. upon the eddy current signal.

Abstract: A sealant applicator assembly (10) for mounting to an automatic drilling and fastener installation machine to apply sealant to the tip or shank surface of a fastener (14) before "wet" installation of the fastener into a hole. The assembly (10) includes a valve member (21) that is opened or actuated by physical movement of the fastener (14) therewith whereby sealant flows into contact with the fastener shank. Upon removal of the fastener (14) from contact with the valve members (21), valve closure takes place due to sealant pressure and sealant flow is stopped. By sequencing the sealant application onto the fastener concurrently with drilling or other hole preparation by the automatic machine, cycle time for "wet" fastener installation is minimized.

Abstract: A method of applying substantially consistent and uniform coatings of a corrosion preventive compound to metallic cable lengths is disclosed which involves the immersion of the cable into a liquid coating compound of controlled viscosity followed by wiping the cable with a compound-containing material upon withdrawal of the cable from the compound.

Abstract: A machine for cutting compound curvature surfaces on a workpiece by a linear or longitudinally extending straight line cutting element that is adjustably movable relative to the workpiece located on a bed of the machine. The cutting element is relatively movable or adjustable to the machine bed in any one of five variable axes or directions, as well as movable or adjustable about any two or more of the five axes or directions of movability and adjustability.

Abstract: A power brake punch for curl forming radii of greater than 180.degree. of arc on the edge of sheet metal workpieces.