The present invention relates to a signal combining apparatus of the active phase array antenna. The signal combining apparatus includes a plurality of signal distributors for receiving a signal from an antenna array element located at boundary between sub antenna arrays and distributing the signal to the sub antenna arrays, which include the antenna array element; and a plurality of signal combiners for combining the signal from a plurality of antenna elements and the signal distributors in cor...

Excellent water repellency, Oil repellency, stain block property and yellowing-resistance are imparted to a textile by a method of preparing a treated textile has the steps of (1) preparing a treatment liquid containing a water- and oil-repellent agent and a stain blocking agent, (2) bringing a pH of the treatment liquid to at most 7, (3) applying the treatment liquid to the textile, (4) treating the textile with steam, and (5) washing the textile with water and dehydrating the textile. The trea...

The cleaned surface of an aluminum or aluminum alloy product, for example, aluminum coil, is treated with a 0.5 to 3 second spray of a chromating bath heated to 40.degree. to 60.degree. C., said bath having a pH of 1.0 to 3.0 and containing 0.1 to 3.0 g/L of tungstate ions and/or molybdate ions, 0.5 to 4.0 g/L of hexavalent chromium ions, 5.0 to 30.0 g/L of phosphate ions, and 0.05 to 2.0 g/L of free fluoride ions. A highly corrosion-resistant, highly paint-adherent chromate coating can thereby ...

A zoom taking lens for a photographic single lens reflex (SLR) camera. The lens has an air space between elements of the lens, which air space is large enough to accommodate reflective means for directing rays which have passed through elements of the lens in front of the reflective means, to viewfinder means. By being able to accommodate the reflective means within the length of the lens and with the reflective means being axially movable the back focal length of the lens may be much smaller th...

A process for impregnating a porous part is provided. In one embodiment, the process comprises impregnating the part with an impregnant that is not water soluble, and curing the impregnated part in a water bath. In another embodiment, the process comprises impregnating a part with an impregnant that is not water soluble, washing the impregnated part in a washing solution, and then curing the impregnated part in a water bath.

A zoom lens comprising, from front to rear, a first lens group of positive power, a second lens group of negative power axially movable for zooming, a third lens group axially movable for compensating for the image shift resulting from the movement of the second lens group, a fourth lens group of positive power, optical filter means and a fifth lens group of positive power, and satisfying the following condition: where f4 is the focal length of the fourth lens group and L is the distance from an...

A mask, preferably for high temperature applications, such as flame spray processes, welding or soldering. The mask consists of an uppermost sacrificial layer formed of a high temperature resistant polymer, a perforated metal layer, preferably a metal screen bonded to the lower surface of the sacrificial layer, a barrier layer formed of a high temperature resistant polymer and bonded to the lower surface of the perforated metal layer, an adhesive layer applied to the lower surface of the barrier...

An ion processing element employing composite media disposed in a porous substrate, for facilitating removal of selected chemical species from a fluid stream. The ion processing element includes a porous fibrous glass substrate impregnated by composite media having one or more active components supported by a matrix material of polyacrylonitrile. The active components are effective in removing, by various mechanisms, one or more constituents from a fluid stream passing through the ion processing...

A zoom finder with an Albada System comprising, beginning on the object side, a first lens component having positive refractive power, a second lens component having negative refractive power, a third lens component having negative refractive power and provided with a half mirror on a surface of an image side thereof, and a fourth lens component have positive refractive power and provided with a frame on a surface of an object side thereof, wherein said Albada System is constructed by said third...

A pressure sensitive adhesive optical film with a pressure sensitive adhesive layer laminated on at least one surface of an optical film, wherein the pressure sensitive adhesive layer has a value of no more than 5 N/25 mm for a P.sub.0 which is initial 90.degree. peel strength at 23.degree. C. and by a peeling speed of 300 mm/minute after an autoclave processing under a condition of 50.degree. C..times.5 atm.times.15 minutes, and a ratio (P.sub.1/P.sub.0) of a P.sub.1 to a P.sub.0 is no less tha...