In order to reduce the effect of modulation of the quantizing error (noise) by the signal in an adaptive digital audio system and to increase the dynamic range of the system, the adaptive analog to digital converter is preceded by a frequency dependent network that changes the shape of its characteristic in response to a control signal. The control signal is derived from the variable scaling facto...

A tape cassette for use in a magnetic recording/reproducing apparatus comprises a housing having top and bottom plates with a pair of tape reels rotatably accommodated side-by-side in the housing between the said plates, and a locking means comprising a plurality of recesses formed on the outside peripheral surface of one flange of each tape reel and at least one locking lever having a pair of bra...

A package for the storage of a plastic medical container holding a medicinal fluid therein, which package comprises a tray part formed by laminating and molding an outer polyolefin layer, an intermediate layer capable of barriering passage of gases and steam and an inner polyolefin layer in the shape of a tray provided round the opening thereof with a flange portion, a lid member formed by laminat...

A package for storing therein a medical container in conjunction with a deoxidizer covered on at least one side thereof with a gas-impervious sheet and on at least one other side thereof with a gas-pervious sheet, which package is characterized by comprising a tightly sealed container adapted to hold the aforementioned deoxidizer in such a manner that the gas-pervious sheet sides of the deoxidizer...

Feed-out arrangement in particular for silos 10 for material which arches seriously, consisting of a horizontal endless conveyor belt 12 which, on either side, has at least one inclined endless conveyor belt 13, 14 parallel to it, which, with its strand facing the material, overlaps the edge portion of that strand of the horizontal belt 12 facing the material. The horizontal belt 12 ends at a dist...

The device is incorporated in a telephone system, and is responsive to ringing or buzzer signals occurring on a line in the circuit. It comprises primary units which receive the ringing signals, and dependent upon which transmit via connections with or without lines optic, acoustic and/or electromagnetic signals. - A second unit, separate to those primary, is connected or is connectable to a wall ...

The plant is installed in a telephone system to control from a calling point (5) one or more objects at the called location (1). After establishment of a connection between the two points (1,5), appropriate components (7,8) transmit tone signals to the called position via the connection (a,b). At the called location, is a primary unit (4) which receives the tone signals, and dependent upon them tr...

The plate is for covering a hole in an object, and comprises a cover part and at least one part for insertion in the hole. The insertion part has at least one flange projecting from the covering part, and extending over the hole. Plate fixture is through engagement between the end surfaces of the flange and the wall of the hole.

Microporous hollow fibre membrane (I) of hydrophilic polyetherpolycarbonate block copolymer (II) for use in plasmaphoresis is claimed in which the membrane (I) has a symmetrical wall structure with smoothly rounded pore openings without sharp edges. Also claimed is a process for making (I) by extruding a soln. of (II) in the form of a hollow fibre (III) and then gelling and opt. washing the fibre....