An apparatus and method for depositing a thin layer of material such as metal within the hole of an object such as a printed circuit board. The apparatus includes a gas diffusion chamber having a plurality of power electrodes with apertures positioned transversely therein. The objects to be treated, such as printed circuit boards, are positioned in the areas between the power electrodes. A supply of electrical energy is connected to the power electrodes and to the conductive layers of the printe...

A lid with a see-through plate to open and close an opening portion of an apparatus has a lid body which has an opening for visually checking the interior of the apparatus, a ring-shaped engaging groove formed along the periphery of the opening, and projections provided in the engaging groove. A see-through plate is removably attached to the lid body to close the opening. The see-through plate has an outer peripheral edge closely resembling the opening in shape and hooks engaging with the projec...

A medical power service column for use in a hospital room for supplying electrical power, lighting and gases and also for providing a centralized support for medical equipment. The medical column comprises a lower column section having an upper end and a lower end in contact with the floor of the hospital room, a see-through section having a first end attached to the upper end of the lower column section for providing increased visibility in the hospital room and a second end extending upward to...

An evaporator for producing wet steam in a cogeneration plant wherein the evaporator is a multiple pass unit having continuous in-tube flow paths from inlet to outlet. The evaporator is a shell and tube type with the clean steam on the shell side and water in the tubes. The evaporator is particularly useful in a cogeneration plant used in a secondary recovery process using contaminated wet steam.

A reversing, fluid directional control valve having a valve body with an enclosed exhaust chamber therein and at least two oppositely disposed sides. One, or two outlet ports are formed through one of the two sides, and they communicate with the chamber, and an inlet port is formed through the other of the two sides and it communicates with the exhaust chamber. At least one exhaust port communicates the exhaust chamber to the exterior of the valve body. A conduit valve means is mounted in the ex...

A feed-through capacitor is provided with a tube-shaped dielectric material having a flange portion, an inward projected portion, and a sheath portion. On the inner and the outer surfaces of the tube-shaped dielectric material, an inner and an outer electrode are formed. A central aperture is formed as surrounded by the inner surface of the dielectric material. In the central aperture, a central shaft is inserted. The tube-shaped dielectric material is thick at the flange portion and the inward ...

A solar collector system having an absorber element including fluid flow channels therein and a cold water inlet and hot water outlet. A temperature sensor is included in the hot water outlet and operates a valve in the cold water inlet to open the valve when the temperature reaches a predetermined value and to close the valve when the temperature drops below the predetermined value whereby the valve operates cyclically to intermittently fill the absorber channels with cold water and to displace...

Compositions and process for the plating of through-holes in an epoxy printed circuit board base material in the manufacture of printed circuit boards. The treatment process is designed to increase adhesion between the epoxy board material and a subsequently deposited metal plate. The process is characterized, in part, by the use of an activated permanganate solution.

A folder for making Z-type folds in material as the material is fed therethrough, having a tongue creating slack in the material and a pair of folder blades cooperating to urge the slack material between the blades to form the fold as the material leaves the folder.

A mounting arrangement for a through anchor for passing an automobile seat belt webbing through characterized in that an adjustable anchor provided with a freely-rotating through anchor is adapted to slide up and down on an adjusting base, freely-rotating adjustable anchor latch pieces provided with fastening legs and biased by a return spring are fixed on the adjustable anchor, and the fastening legs are fastened with fastening means provided on the adjusting base so as to hold the adjustable a...