A hollow steel beam is formed of sheet metal by automated forming machines including a continuous welding operation. To provide sufficient material along the upper and lower surfaces of the beam, to develop the full potential strength of the beam in bending, reinforcing strips are welded to the upper and lower stringer sections of the beam in an automated machine operation.

Apparatus for producing a beam of radiated energy comprises an array of transducers, a source of reference pulses for determining the frequency of the energy to be transmitted, a frequency divider connected to each of the transducers, and a source of clock pulses connected to the frequency dividers which determine the phase delay between the signals coupled to the respective transducers as a function of clock pulse frequency. Each of the frequency dividers includes an enabling input and an inhib...

An apparatus for displacing an optical beam to a selected point anywhere within a circular area, providing extensive linear displacement of the beam, includes a plurality of pairs of parallel reflective surfaces. Each pair is arranged to receive an incoming beam and provide an exiting beam that is precisely parallel to the incoming beam. One of the pairs is mounted for rotation substantially about the axis of the incoming beam. At least another of the pairs is mounted to the first pair for rotat...

A beam director has a base with a mirror arranged to reflect the beam upward, and a guide above the base carries a vertically adjustable support arm. A rooftop reflector is arranged on the support arm above the base mirror so that the beam reflected from the base mirror is incident on the rooftop reflector. The horizontal position of the rooftop reflector along a line perpendicular to the ridge line of the reflector is adjustable to translate the beam horizontally without changing its direction ...

A lifting apparatus includes an I-beam having a lower flange and an upper flange; a plurality of hoist connectors positioned on the I-beam extending upwardly from the upper flange; a center load connector positioned on the I-beam extending downwardly from approximately a midpoint along the lower flange; and at least two movable load connectors positioned on the I-beam extending downwardly from the lower flange, each movable load connector engaged with the I-beam by a plurality of support members...

A balance beam having a shock absorbing capability. The balance beam comprises an elongate beam member, an elongate beam support core supporting the elongate beam member, and a resilient element located between the beam member and the beam support core. The resilient element allows the beam member to move relative to the beam support core when a vertically downward force is exerted on the beam member to absorb shock imparted to the balance beam by a user.

A beam splitter for electron beam machines with a beam splitter grid which is to be set crossways to the beam and which has a row of cross-pieces running next to one another with uniform spaces for shading the portions of beam striking it, where the cross-piece materials is replaceable in operation by cross-piece material not already acted on by the beam.

A combined laser beam shutter and beam "on-off" indicator is disclosed. A rotatable shutter pin is mounted in a beam interrupting positon with the shutter having an aperture thereon which, when the pin is rotated to the proper position, permits passage of the light therethrough. The shutter pin is adapted, when in closed position, to reflect visible light caused by the laser to a position for observation thereby indicating that the beam is "on".

A beam homogenizer that minimizes undesired intensity variations at the output plane caused by sharp breaks between facets in previous embodiments. The homogenizer includes a hologram made up of irregularly patterned diffractive fringes. An input beam illuminates at least part of the hologram. The hologram transmits a portion of the input beam onto an output plane. In doing so, the energy of the input beam is spatially redistributed at the output plane into a homogenized output beam having a pre...

The balance beam of this invention has an elongated beam member having opposite ends, a center portion, a top and a bottom, with legs on the bottom thereof adjacent the ends. Each leg has an upper and a lower end. A resilient support and trolley assembly is mounted within the elongated beam adjacent the ends thereof with each support assembly having a depending arm member extending downwardly therefrom with each arm member being pivotally secured to one of the upper ends of the legs. The legs ex...