An elongate beam that is constructed of a sheet metal having expanded metal sections. The beam has a closed profile that has at least two side sections at least one of which includes expanded metal. The opposite side edges of the sheet metal are connected to one another so that the sheet metal forms a closed beam structure.

A beam for grid in a suspended ceiling that has an increased effective beam height over prior art beams. The beam has a peak at the top, which conforms to the shape of a standard light fixture box frame supported by the beam in the ceiling. The beam does not interfere with the proper support of the fixture frame on the beam flanges.

A flanged beam with a web structure formed of a wire or strip-like member (2) bent to zigzag, meander or wave configuration, the bending spots (3) thereof being attached to the flanges (1). The specific feature of a beam performed according to the invention is that at least one flange (1) incorporates a flange section extending alongside this flange. The flange section, which is made of another material than the rest of the flange, is embedded in the flange and is cast to form a unit with it and...

A front bumper beam for a vehicle comprises a hat profile (11,15) with a cover (10) and it has its cover facing forwards. The beam has a central portion (22) with lower profile than its side portions (20,21) and, as distinguished from the side portions, this lower central portion (22) has a reinforcement in the form of a bent edge (23,24) on at least one of the side flanges (14,15) of the hat profile.

A transducer employs a beam with spaced, parallel end portions interconnected by a middle portion disposed at an angle of about 45.degree. with respect to the end portions. Strain gages are mounted on the middle portion of the beam. The transducer can be employed for measuring and monitoring forces acting on a shaft.

A beam splitter formed by laminating a plurality of optical films on a glass substrate having a refractive index of 1.51.+-.0.10. The optical films are first, second, third, fourth, and fifth layers laminated in this order from the glass substrate. The first layer has a refractive index of 1.44.+-.0.10 and an optical film thickness of 0.05-0.15; the second layer has a refractive index of 1.68.+-.0.10 and an optical film thickness of 0.01-0.10; the third layer has a refractive index of 1.44.+-.0....

An insulative beam and method for its construction. The insulative beam includes two support channels formed from a sheet metal and a block of a plastic material shaped so that each of the two channels wraps at least partly around the block of plastic material. In some embodiments of the invention, the channels extend longitudinally beyond the block of plastic material. If desired to give additional strength to the ends of the insulative beam, the ends are reinforced with angles or channels that...

A simple, one-piece connector retains beams in side-by-side relation and is deformable to enable rapid flush leveling and interconnection of such beams.

A microwave oven having means defining an oven cavity, a magnetron microwave power source, a waveguide for coupling energy from the magnetron to the oven cavity and preferably a mode matching transformer for establishing primarily only the dominant mode in the oven cavity. A beam stirrer is disposed adjacent the waveguide feed into the cavity and is in the form of a resonant structure for coupling the energy to the cavity. The resonant structure is rotated in an eccentric manner to spread the en...

A structural beam in the form of a channel, preferably of generally Z cross-section, having a central web and oppositely directed flanges along the longitudinal edges of the web is bent to an angle by cutting a slot through one flange and the web in a plane normal to channel axis to split the web and flange into separate sections having adjacent ends and then bending the other flange along a bend line in the plane of the slot to effect relative displacement of the web and flange section ends tow...