Abstract: A telescopic boom that includes a plurality of extensible boom sections and a power source for delivering translational force to the boom sections. The boom further includes at least one rope transiting between boom sections wherein a first section is extending, and the second section is adjacent to the extending sections. The rope is redirected by at least one sheave mounted to the adjacent section and further redirected by at least one sheave mounted to the extensible section.

Abstract: A cableway carriage including: a base member 1; a main cable braking member 10 that has a braking face that comes into contact with the main cable and that is secured to the base member; a first lever 20 that has a first fulcrum serving as a center of rotation and secured to the base member, a first lever braking face provided in a position facing the braking face, a biasing member that biases the first lever braking face in a direction of separation from the braking face, and a drive pulley capable of applying a force in the direction in which the first lever braking face is brought close to the braking face by the tensile force of the rope, and a second lever 30 that has a second fulcrum secured to the base member and serving as a center of rotation.

Abstract: A fail-safe log skidding carriage for skyline logging operations utilizes parallel clamp assemblies for engagement of the skyline or dragline in a repeating alternating sequence. The outer ends of a pivoted crank are operably connected to the movable shoes of the two clamp assemblies to move them between operative and released clamping conditions. The crank is moved over-center with respect to a reference line perpendicular to the lines of contact between the crank and the clamp assemblies and intersecting the pivot axis of the crank, thereby preventing accidental mechanical release of a locked crank assembly should hydraulic failure occur during use of the carriage. The hydraulic system is remotely controlled through a radio receiver that sequences the hydraulic cylinder from one extreme position to the other. An overriding electrical control is provided to assure clamping of the dragline when a log or logs are lifted to the carriage.

Abstract: A display case having a framework and a plurality of panels forming an enclosure for the displaying of merchandise is provided with a light fixture for highlighting the merchandise therein. The light fixture is positively mounted to the framework through fastening means which are accessed from the interior of the enclosure. Furthermore, the panels are mounted upon extruded supports which reduce manufacturing costs and ease reinstallation of the panels.

Abstract: A boom for an excavator or the like is constructed to have a generally L-shape when viewed in side elevation and have a circular cross section tapering downward from a maximum diameter at the apex of the boom to each end. The boom is made up of a central body portion consisting of a cast-form elbow and a pair of tapered tubular members formed of rolled plate welded along a longitudinal seam extending from the elbow outward to the outer ends of the boom. A pair of cast-formed connecting members are then welded to the end of the boom. The method of fabrication includes the cast-forming of the elbow and the respective end connecting means and forming the tapered body members by rolling and connecting the entire assembly by welding.