A method and apparatus for bending beams by which a beam is subjected to pure moment bending in a critically oriented plane to avoid twist and to maintain single plane bending in a beam of arbitrary cross section. As disclosed, a pair of bending heads laterally engage a beam at longitudinally spaced points. Force actuator means connected directly between the heads is energized to rotate one of the heads relative to the other to produce a bending moment in a work area in the beam between the head...

A beam structure for a viaduct comprises hollow beams of reinforced concrete which are joined in end to end relationship. The end portion of each beam has an internally extending flange in which the reinforcing members of the beam are anchored. Adjacent beams are inter-connected by reinforcing cables extending across the joined ends and embedded in the adjacent flanges of the beams. The reinforcing cables and members together act to place each flange under compression. A hardenable mass injected...

A beam compass consisting of a rectangular channel-shaped beam with circular bulb-shaped edges, designed to engage two parallel circular grooves on flat disc-shaped sliders. This type of design provides utmost precision and accuracy in a beam compass without the necessity of auxillary apertances such as threaded locking nuts, leaf springs, wheels or thumb nuts.

A clamp for holding a beam against a gage for the performance of a punching operation is positioned between the rollers of a conveyor and includes a jaw normally projecting upwardly between adjacent rollers and beyond the tops of the rollers. The jaw is mounted on a collar telescoped onto a reciprocable rod extending across the conveyor and is urged into an upright position by a torsion spring acting between the collar and the jaw. When the rod is shifted, the jaw clamps the beam against the gag...

In a beam clamp having a pair of arms suspended from a lifting ring, the ring is formed of two parts -- a rod portion, and a plate portion with notched ends receiving corresponding ends of the rod portion and welded thereto. The rod portion, which has circular cross-section, is bent to form a circular arc and is inserted through holes in the arms. The plate portion, which has rectangular cross-section, follows a different curvature to render the ring self-centering when suspended from a chain, t...

A weighing machine in the form of a beam scale has a balance beam which is pivotable on an edge line. The balance beam comprises a bottom member which has a longitudinal channel in which a sliding weight is displaceable. The bottom portion of the channel is provided with a series of apertures, and the sliding weight has a projecting stud which is adapted to be selectively brought into engagement with any one of said apertures.

An ion beam detector with a low-voltage, current-measuring lead connected to both a deflector and a multiplier anode and with the deflector and multiplier inlet so positioned as to deflect the beam into the inlet without the presence of a high positive voltage on the deflector.

A feed beam for a rock drill comprises a box girder (13), a saddle (10) slidable along the box girder, and two power units (20,20a) inserted into the ends of the box girder. Each power unit comprises a pair of fixed pulleys (22,24) located outside the end of the box girder, an hydraulic jack (26) carrying a pair of movable pulleys (28,30) within the box girder, and a cable coupled between the power unit and the saddle and passing over the four pulleys.

Block-forming means or shuttering apparatus for precast units of especially long dimension along one axis, a horizontal basic frame and two block-forming or shuttering walls of which are means for at least one is guided slidably being selectively adjustable along the basic frame to change the mutual distance between the two shuttering walls, piston and cylinder assemblies 16 for driving of said sliding guided means, and clamping means 19 for clamping together one of the slidable shuttering walls...

A beam scanning electrode is mounted on a rotor and is movable repeatedly across a beam of high energy particles when the rotor is rotated. The scanning electrode is mounted within a beam tube having a conductive wall to which the scanning electrode is electrically connected, as by a wiping contactor. The impingement of the beam upon the scanning electrode causes the emission of secondary electrons which are gathered by a collector electrode, spaced from the scanning electrode and insulated from...