A low center-of-gravity cycle is provided in which the rider is supported in a substantially lying position on a rider support member mounted on the body of the cycle. Front wheels mounted on the front of the body are used to steer the cycle while a single wheel mounted on the rear of the cycle is used to drive the cycle. The cycle is extremely stable and reduces rider fatigue because of the substantially lying position of the rider which brings about the low center-of-gravity and less air resis...

This invention relates to prosthetic joints of the type used to replace dysfunctional natural joints such as the shoulder, hip, and knee. Provision of an intermediate floating bearing element to which are rotatably engaged members which are in turn secured to the appropriate bone structures results in enhanced relative motion and improved resistance to dislocation. A flange or "skirt" on the floating bearing element provides additional strength and improved function. The invention is suited to e...

An improved crane boom structure for telescopic boom sections. The conventional, generally rectangular cross-sectional shape is modified to provide central guiding of the boom sections to locate the bearing forces transmitted between sections at or near the neutral axis where bending stresses are minimal for greater load carrying capacity for a given boom weight. The boom side walls are provided with channel shaped projections, the top and bottom channel legs being located on either side of the ...

A lamp shade center is formed of flat metal stock with adjacent sections lanced in opposite directions, defining tunnel-like openings for receiving radial lamp shade support wires. The center is adapted to be secured to the wires by deformation of the lanced sections back toward the original plane of the stock, preferably the lanced portions of all the retainers constructed to be deformed to grip the respective wires in one motion.

A center hoisting device for rolls and the like is disclosed which comprises a hoisting piece that can be fitted inside the center of a roll of paper or the like and which can be expanded so that its circumference presses against the wall of the roll center to create a frictional contact between the hoisting piece and the roll; the hoisting piece being a hydraulic cylinder hoisted by its piston rod, wherein the upper part of the peripheral wall of the cylinder has at least one aperture, and the ...

An improved rotary device of the angle piston type for effecting compression of a gaseous fluid characterized by a center section compressor that includes uniformly shaped members intermediate the pistons and disposed in an annular chamber defined by end seals and radially inner and outer walls that engage the shaped members in fluid tight relationship so as to effect compression of a fluid trapped between adjacent members as they move from a first location in which the annular chamber is longes...

A center-pivot irrigation system for large area irrigation including an elongated main water conduit, mounted on an extending between a series of self-propelled support towers and projecting radially outwardly from a central pivot, for irrigating a circular area. A boom, including an auxiliary water conduit supported upon at least one boom support tower, is pivotally connected to the end of the main conduit opposite the central pivot; the boom is guided along a non-circular path by sensing means...

A multiple center punch tool for use in multiple punching, marking, starting and indenting operations as a plurality of center punches, comprises a generally circularly disposed body structure with several punch points of different types of periphery thereof and anvils or striking heads opposed to the punch points. The punch members (points and anvils connected by the tool body) are arranged in sequential order, according to size or type, for convenience in selecting a particular punch and for e...

A portable center drill wherein a tubular support number has a centering chuck mounted on one end thereof. The centering chuck serves to clamp the drill onto one end of a workpiece to be center drilled and to precisely align the axis of a drill bit with the center of the end of the workpiece. The drill bit is releasably mounted in a drill chuck that is rotatably mounted in an axially movable carriage in the support number. The drill bit chuck is driven by an electric motor through a reduction ge...

An interlock for center opening elevator hoistway doors, in which one door is powered and the other door is operated by a cable from the powered door, has an interlock switch operated by the powered door to prevent the elevator car from leaving the landing before the hoistway doors are closed. When the idle door is open, a tab connected to a spring loaded pivoted lever swings into a position underlying the interlock to prevent the interlock hook from dropping into position to close the interlock...