Abstract: A billet lubrication apparatus which lubricates an end of a metal billet prior to insertion of the billet into an extrusion press by providing for timed, relative rotary coaxial contact between the billet and a solid lubrication medium during transfer of the billet into the extrusion press.

Abstract: A tilting window sash having a lock pin intermediate the ends of the vertical stiles which supports perpendicular loads to prevent inward bowing of the sash and which automatically releases upon normal lifting and/or tilting of the sash.

Abstract: A pair of rectangular sash, framing glass panes for normally closing an opening in a wall, overlap each other at one end, with one sash slidable horizontally relative to the other to open said opening. Each overlapping end includes a vertical sash rail provided with horizontally spaced inner and outer vertical flanges extending toward the opposite end of the sash that carries those flanges, with all of the flanges disposed between the rails. The inner flanges of the two rails are spaced apart and located between the outer flanges in overlapping engagement with them to interlock the two rails. Disposed in the space between the inner flanges is a pair of vertical weather-sealing strips, each of which is connected to a sash. The strips extend toward each other and into contact to form a weather seal between the rails.

Abstract: An X-ray tube is described in which, in order to produce a well defined electron beam which can be accurately focussed on the target of the tube, the cathode comprises a flat plate member, such as a tape or foil, the surface finish of which is sufficiently smooth that electrons are emitted therefrom with lateral energies below 0.2 electron volts. The aforementioned surface finish is such that irregularities in the electron-emitting surface of the cathode do not exceed one micron in amplitude.

Abstract: A pair of sliding window sashes have overlapping ends, each of which includes a vertical sash rail to which a vertical metal bar is joined between the rail and the other sash. Each bar has a pair of vertical slots in it separated by a vertical flange and facing the opposite end of the sash that carries the bar with the outer side wall of the outer slot forming a tongue extending into the outer slot in the other bar to interlock the two bars while the window is closed. The inner side wall of each groove extends outwardly beyond that groove toward the opposite end of the sash to form a vertical flange. A vertical sealing weather strip is connected to the side of each bar opposite its slots and engages the flange on the other bar to form a seal.