Abstract: A laminated structural panel is formed of top, bottom, and one or more intermediate layers of material having low strength at high temperature and with perforated high temperature, high strength materials interleaved between the top, bottom and intermediate layers. Brazing material is clad on the top and bottom layers and the intermediate layer or layers may be entirely of brazing material or clad on both sizes with brazing material, such that when the assembled stack is subjected to high temperature in a high vacuum environment brazing material is caused to melt and fill the perforations in the high strength material. A particular application is for structural panels, used as shelves in manufacturing electronic chips or displays where aluminum is advantageous because it does not outgas or release particles under the high temperature, high vacuum environment used to make the product. Aluminum, however, does not maintain its strength and stiffness at the high temperatures involved.

Abstract: A disk or rotor for a disk brake system is formed of a number of stacked metal plates, normally with outside plates having a high resistance to abrasion and great strength and with inner plates formed of metal having good heat transfer characteristics and having inside and outside rims and generally radially directed slots between the rims, the inner plates being aligned such that the slots are held in registry, and all of the inner and outer plates are brazed together to form a unitary disk. Inside and outside diameters are then both trimmed to remove the rims and open the slots between fins formed when the inside and outside rims are cut away. One or more outside plates on one end of the stack are trimmed to a smaller diameter thus leaving a flange which is drilled to provide mounting holes for the disk. Modified forms of the disk include solid inside plates and inside plates with perforations or corrugations.

Abstract: Laminated structural panels and the method of producing them involve selection of a desired member of sheets of sheet metal of the desired thickness and material, perforating one or more of the sheets to a desired pattern depending upon characteristics desired such as lightness, stiffness or inclusion of fluid passageways etc., stacking the perforated sheets with imperforate face sheets top and bottom and, with brazing material at the interface between the sheets, subjecting the stack to a temperature high enough to cause melting of the brazing material while maintaining a very high vacuum environment. In an alternative embodiment, one or more imperforate internal sheets may be interleaved between the perforated sheets.

Abstract: Applicant's sprinkler head is molded with a large number (such as twelve or sixteen) of potential orifices and directing channels with the orifices all plugged or occluded with comparatively light barriers or plugs of the molded plastic material which are readily punctured and removed by the user. In this way the user may select among many possible watering patterns including not only the above described full, one-half, and one-fourth circles, but may also choose to punch one orifice, giving a thirty or twenty-two and one-half degree arc, then skip one or two plugs, then punch another plug or two. In this manner one or a number of orifices may remain blocked making it possible to, for example, water a thirty degree arc, skip sixty degrees, water another thirty of sixty degree arc, etc. Many such patterns become possible.