A process for the treatment of a beryllium-copper alloy to reduce or eliminate the distortion which occurs on precipitation treatment is provided in which the alloy is quenched in a medium providing a heat transfer coefficient of 150-750 B.Th.U/ft.sup.2 h.degree.F, said quenching being below the normal precipitation treatment temperature of said alloy. The invention has utility in the production of an alloy which has little or no distortion on precipitation treatment as well as a predictable con...

Rotary barrel for treating materials, notably hides and skins, adapted to be rotated about an axis tilted to provide an upper bottom and a lower bottom shell, the barrel being rotatably supported by a pair of rollers and driven by one of these rollers, which are disposed adjacent the upper bottom for engagement with a race-forming annular ring rigid with the barrel, the lower end of the barrel being provided with a swivel bearing coaxial thereto. The barrel may have a cylindrical, biconical or c...

A method of bleaching a clay which comprises forming an aqueous suspension of the clay and contacting said aqueous suspension of the clay with a gas comprising ozone.

Titanium dioxide particles having improved resistance to "dusting" prepared by providing a coating on the particles of a mixture of at least one ester and at least one silicone.

Chair for medical or dental treatments, having the back divided into a plurality of adjustable sections with means for maintaining a spacing between the sections and guides for controlling the motion of same, the length of the back being adjustable.

A treatment system is disclosed, which has a treatment apparatus for performing a predetermined treatment for a planar workpiece contained in a carrier, and an first air-tight carrier storage chamber for storing the carrier. The treatment apparatus may also have an air-tight second carrier storage chamber. An inert gas supply and exhaust are connected to each of the treatment apparatus, the first carrier storage chamber, and the second carrier storage chamber. A valve device is provided for the ...

A gas supplied from a gas source is exposed to an atmosphere above a liquid surface in a tank saving the liquid and thereafter is supplied around a wafer in a treatment chamber through a gas supply passage and a supply port. The gas supplied around the wafer uniformly flows from around the wafer toward above the center of the wafer and thereafter is discharged from an exhaust port which is formed at the top of the treatment chamber. Meanwhile, with respect to the wafer, heat treatment is perform...

To oxidate materials in water, a chamber is filled with air. Thereafter, raw water is pumped in, thus, compressing the air. Then the air from the top of the vessel is pumped to an air diffusion plate at the bottom. The operation is continued as a batch operation for the desired length of time and, thereafter, the treated water removed from the chamber.

A therapeutic table having a stationary support and a top mounted to the support for reciprocation longitudinally between limit positions cooperates with traction apparatus mounted to the support for periodically applying traction to a patient lying on the table. The table is reciprocated by a motor which is powered through a timer switch capable of being preset to various time intervals. In one embodiment, a control circuit having a selector switch and a pair of limit switches cooperates with t...

The method for forcing differentiation of the pineapple plant (flowering) or ripening of pineapples by treatment with ethylene as a discontinuous gas phase in an aqueous foam. In a typical embodiment, an aqueous foam comprising water, an oil-in-water surfactant to reduce surface tension and/or a viscous additive to increase the surface viscosity with a discontinuous ethylene-containing gas phase is applied to the pineapple plant. Typically, such a foam composition contains up to 10 volumes of et...