A device for handling porous solid matrixes (16) in analytic determinations of the type comprising at least one reaction step, which is performed in the very matrixes by absorption of a liquid phase therein, comprises a holder (1) and at least one matrix carrier (2), each of which can retain a matrix (16) while at the same time permitting liquid which surrounds the matrix carrier to substantially ...

The size distribution of wood chips for the manufacture of cellulose pulp is determined by an optoelectric measuring method and device. Light reflected from a conveying surface (2) and lump material distributed thereon, is recorded optically (3) at short time intervals, and recorded signals are processed electronically for obtaining the size distribution of the material over a number of selected s...

An optical device (70), capable of being variously optimized so as to have the characteristics of a switch, modulator, and filter. The device (70) is obtained by providing first (72) and second (74) optical channel waveguides generally parallel one another at a surface of an electro-optic substrate (32), the waveguides being optically coupled in first (I) and third (III) regions of the device (70)...

Disclosed is a method and apparatus for the lowcost assembly of precision optical devices utilizing single or multiple bounces. The apparatus makes use of a precision machined alignment platform to support optical mirrors in precise alignment. A low cost holding structure is clamped over the alignment platform to position one of a plurality of connected sections adjacent to the back of each mirror...

In a microcomputer, an address mapper allows the user to selectively map a resource which is ordinarily addressable in one portion of the address range of the microcomputer into a correspondingly sized area elsewhere in the address range. Using a resource map address stored by the user in an addressable map register, the mapper continuously compares the map address to a corresponding number of bit...

A system for automatically logging the interaction between a plurality of objects. Small, self-contained transmitting beacon units are attached to a first set of objects. These beacon units transmit a uniquely coded signal at prescribed intervals. A small, self-contained portable transceiving unit is attached to a second set of objects. The second set of objects typically moves in, about, and amon...

Control device for the flow of a liquid out of a container, in particular a rainwater retention basin, which has a throttling device comprising an outflow channel and a throttling plate and has a positioning device for the throttling plate, which is driven by the liquid itself counter to a compensating force and as a function of the liquid level in the container, which positioning device is formed...

A keyboard is disclosed having keys subdivided into one or more fields. Two keys from the same field concurrently actuated identify a particular character. Characters are also identified by the actuation of a single key independently of any other key. Pivot keys may be included which are a part of more than one field. A color coding arrangement makes the two key combination unambiguously suggested...

The divider of electrical signals comprises a set of resistive elements, provided with current taps (3, 4), and current collectors (7), which are intended for the interaction with any of the current taps (3, 4). The resistive elements are fabricated as blocks (2) from glass, each of them having a given volume specific resistivity. The blocks (2) are secured so as to form a rigid construction.

Reciprocating internal combustion engine (1) comprising at least one combustion chamber (4) with a screwthreaded hole (6) in a wall thereof, normally provided for mounting a spark plug. In the screwthreaded hole (6) a pre-chamber member (8) is mounted, said member enclosing a pre-combustion chamber (10) and comprising a wall section (12) provided with at least one orifice with a smaller cross-sect...

A tuning assembly (42) for selectively oscillating the frequency of an electromagnetic field within a hermetically sealed device (12), which device includes a rigid, hermetically sealed housing (14), apparatus for generating the electromagnetic field therewithin (32, 34 and 36), for elements for defining a cavity (30) within the housing for establishing the frequency of the electromagnetic field. ...

Liquid phase epitaxy (LPE) growth of a Group III-V semiconductor compound layer upon a Group III-V semiconductor compound substrate containing phosphorus is accomplished in a graphite meltholder by heating the substrate in an atmosphere of nitrogen or helium and contacting the substrate with a liquid melt, capable of growing the layer, in an atmosphere of hydrogen.

Disclosed is a channel unit for directly interconnecting a toll office multiplex line and a terminal unit line such as that of a private branch exchange (PBX) or a telephone station set, thereby eliminating the normal local end office interconnection. In particular, the channel unit interfaces the different signaling protocols of the two lines and generates call progress controls signals such as d...

A low frequency sound producer including a plurality of magnetostrictive vibrators arranged seriatim end to end to define a ring. Each vibrator unit includes a plurality of laterally related magnetostrictive rods which, in the illustrated embodiment, are formed of rare earth magnetostrictive material. Structure is provided for compressively prestressing the rods. The prestressing structure include...

Disclosed is a pulse width decoder which receives a double frequency modulated (DFM) waveform and recovers therefrom the contained NRZ-L data and clock information. Basically, the decoder looks for long and short pulses in the DFM waveform. A long pulse is decoded as a "0", while a pair of short, opposite polarity pulses are decoded as a "1". In addition, in order to allow for pulse shortening in ...

The commutator electric motor comprises a stator winding (7), a tacho-generator winding (9) and an annular permanent magnet (6) of a rotor. The permanent magnet (6) is so magnetized in an axial direction that it has two sets of alternating opposite poles (13, 14). The poles (13) of the first set are defined on the face surface of the permanent magnet and form a main magnetic flux which acts on the...

PCT No. PCT/CH84/00154 Sec. 371 Date Jun. 27, 1985 Sec. 102(e) Date Jun. 27, 1985 PCT Filed Sep. 26, 1984 PCT Pub. No. WO85/01619 PCT Pub. Date Apr. 11, 1985.In an alternating current synchronous servomotor, a disk-shaped rotor (20) is arranged between two stator halves having each a coil with leads extending in the radial direction. The rotor (20) comprises an even number of flat permanent magnet...

An inverter control system for selecting an angle set defining an inverter output waveform in response to various operating conditions of the inverter. The inverter control system selects an angle set in response to signals representing the power factor of the load and the normalized DC bus voltage to minimize the harmonic content of the inverter output waveform and to compensate for voltage drops...

A push-pull converter has transistor power switches which conduct alternately to connect a DC source with the primary windings of an output transformer. A turn-off snubber circuit is connected with each power switch. When a power switch is turned on, snubber current pulses flow in the circuits connected with both switches. A switch current sensor circuit has a current transformer with an output wi...