An air filter for removing particulate matter from an airstream comprising a casing with a first air guide means for efficiently directing the uncleansed particulate-laden air into an inertial separating means enclosed within said casing, said inertial separating means adapted to remove relatively heavy particles from the airstream; a second air guide means for efficiently directing the airstream from said inertial separation means to the outer surface of the filter media of a filter enclosed wi...

An air filter for removing particulate matter from an airstream comprising a casing with a first air guide means for efficiently directing the uncleansed particulate-laden air into an inertial separating means enclosed within said casing, said inertial separating means adapted to remove relatively heavy particles from the airstream; a second air guide means for efficiently directing the airstream from said inertial separation means to the outer surface of the filter media of a filter enclosed wi...

The invention relates to a process for the preparation of cyclic carboxylic acid orthoester fluorides in which a) at least one bis(alkylthio)carbenium salt is reacted with at least one organic compound containing at least two hydroxyl groups in the presence of at least one base, b) and subsequently, preferably in situ, the resultant thioorthoester is subjected to oxidative fluorodesulfurisation using a fluorinating agent and an oxidant to give the cyclic carboxylic acid orthoester fluoride.

The present invention is a global wireless network also can be called a convergent box that can interface with existing tele-communication systems so as to enable the existing tele-communication systems to handle the increasing demands of wireless communication.

This invention relates to a folding portable information terminal including an upper unit having a display section on one surface, a lower unit having an operating section on one surface, and a movable joining member which openably and pivotally couples the upper and lower units to each other or openably couples the units to each other at one end of each of the units. This portable information terminal includes an upper unit posture detecting unit for detecting opening-closing and/or pivoting op...

A die casting system comprises a machine of the balanced, dual movement type wherein the part is cast and trimmed without any lateral movement. Both halves of the molds or dies are moved equal distances to and from the part plane. The machine incorporates a system of metal injection on the mold parting line with a runner-drain provision; provision for supporting the part at a plurality of points after the die opening; hydraulic fluid volumetric flow reduction; various nozzle configuration option...

In an output control device which controls an amplification factor of an amplifier in response to an input signal and a fade control signal to carry out a fade operation of an output signal, such as a fade-in or a fade-out operation, a level control signal is produced to widely control output levels of the output signal. A plurality of timing signals are produced from either the fade control signal or the level control signal and are selected in response to the level control signal and are selec...

A system for identifying a program stream being displayed at a receiver location comprises means at a central station for measuring the relative luminance of a plurality of predetermined areas in each frame and recording that data with their times of occurrence for each of a plurality of program streams as reference data, and means at a receiver location to measure the relative luminance of the same areas but at a repetition rate less than that at the central station for a given time after a cha...

A frame construction for a radio telephone or the operating device of a radio telephone. The radio telephone comprises a frame on which printed circuit boards containing telephone electronics are secured on both sides of a substantially flat, electrically conductive frame plate. The frame plate together with ground foils of the printed circuit boards form EMI-shielding for the components located on the sides of the printed circuit boards which face the frame plate. The frame plate preferably has...

A water-steam separator made up of a number of "cell" structures, each cell having a vertical cylindrical member with a spinner arranged in its lower portion, and holes through the walls thereof above the spinner. A housing surrounds, and extends above, the cylindrical member. A plate with a central opening therein is positioned within the housing above the cylindrical member.