A method for operational monitoring of digital optical waveguide transmission paths is indicated in which the bits are combined to form data words and transmitted along with check bits which are added to the data words in each case in the same position. Check bits are generated at the receiving end in the same way as at the transmitting end and are compared with the check bits extracted from the d...

An automatic test equipment for the functional testing of electrical printed circuit board assemblies is constructed as the combination of a programmable controller based upon a microcomputer and selected interface modules which can be plugged into the controller system backplane in any of a number of module interconnection locations and in any combination of module types with the controller being...

The compound of formula I wherein R2 is methyl, ethyl, isopropyl or sec-butyl, can be prepared by selective chlorination of an appropriate milbemycin derivative either with hypochlorous acid (HOCl) or sulfuryl chloride (SO2Cl2) in the temperature range from -10 DEG to +60 DEG C. It is employed as pesticide for controlling Arthropode species such as injurious insects or ecto- or endop...

In Fourier transform NMR imaging, magnified images free of aliasing artifacts are achieved by band limiting the NMR signal in the X- and Y-axes directions thereby avoiding under-sampling. Band limiting in the X-axis direction is accomplished by reducing the signal bandwith by a low-pass filter before A/D conversion. In the Y-axis direction, the signal is band limited by providing selective excitat...

A headbox (10) for delivering stock (11) to a forming surface in a papermaking machine with the headbox (10) having a slice chamber and a slice opening (16) and having trailing elements (18, 19) positioned in the slice chamber extending transversely of the headbox with means anchoring the elements (18, 19) only at their upstream ends with the donwstream portion unattached and constructed to be sel...

The speed monitoring component comprises a hydraulic pump which is driven at a speed which is at all times in constant proportion to the water turbine speed, and the oil pumped by it flows through a throttle. Oil, the pressure of which is speed-dependent, activates a component for distributing oil to a work cylinder, and is fed from a separate pressure system which is independent of the measuremen...

Apparatus for measuring preferably the rotational speed of rotating bodies and comprising a sectored disc (3) with transparent and non-transparent sectors placed on the apparatus, a light source (4) placed on one side of the sectored disc and a sensor (5) placed in the light beam transmitted through the disc and means for transforming output signals from the sensor into information signals relatin...

Process for the preparation of pulverulent metallic oxides with predetermined reactivity which is adjusted by the specific surface area, which are intended to be subjected to subsequent conversions, by thermal treatment of corresponding nitrates in the form of an aqueous solution or of a solids material, consisting of hydrated uranyl nitrate, on its own or in admixture with at least one of thorium...

Process for the preparation of pulverulent metallic oxides with predetermined reactivity which is adjusted by the specific surface area, which are intended to be subjected to subsequent conversions, by thermal treatment of corresponding nitrates in the form of an aqueous solution or of a solids material, consisting of hydrated uranyl nitrate, on its own or in admixture with at least one of thorium...

A way to cultivate microorganisms and produce contact between gas and/or liquid medium and contact elements where a mixing of medium and contact elements is effected by bringing the medium in contact with contact elements of both higher and lower density than the medium. The contact is optimated by revolving of containers which can be connected with each other for a gradual treatment and are turne...

A way to cultivate microorganisms and produce contact between gas and/or liquid medium and contact elements where a mixing of medium and contact elements is effected by bringing the medium in contact with contact elements of both higher and lower density than the medium. The contact is optimated by revolving of containers which can be connected with each other for a gradual treatment and are turne...

The articulated and adjustable blade fixture is fittable on a rotatable washing and cutting mouthpiece for cleansing cylindrical pipes. - It is rotated on the washing and cutting mouthpiece, and its threaded shaft is screwed in or out of an articulated union.

The weapon is fitted with a height-adjustable target follower (4) which produces signals indicating the distance to the target at different time intervals. Also mounted on the weapon are transmitters which produce signals representing the weapon's traverse and elevation. A calculation unit is connected to the target follower and transmitters, and from their signals produces dimensions representing...

The lock mechanism locks the sides of the load platform on a vehicle in the upright position. It is adjustable in a catchment position in which it receives and maintains the side until locking occurs.

The wheelchair has a chassis formed as a rigid unit with two longitudinal frame tubes (4) crossed by a wheel axis (3). The axle and each frame tube are connected by U-shaped stirrups (7), the bottom parts of which enclose the tubes, and their arms have apertures through which the axis extends. A two-part wedge (8) is fitted between the axle and frame tubes and between the stirrup arms. It is fitte...

The channel furnace comprises at least one primary coil. The channel at its part abutting the coil and the part of the inductor facing the furnace hearth may have a ceramic wear lining. The other parts of the groove do not have the wear lining.

A carriage is movable in front of a printing platen, and supports a daisy wheel with typing arms, with a hammer which strikes against the selected arm for printing. The electronic control circuit regulates the daisy wheel and printing hammer movement, and the daisy wheel has at least one typing arm, the type of which has a centre of gravity for its printing area displaced relatively to the geometr...

The grate (1) is formed with step-form stages (14-20) arranged in the fuel feed direction. Fuel is fed to the grate uppermost stage (14), and after combustion residual products are fed away from the lowest grate stage (20). - On each grate stage is a scraper moving backwards and forwards which is activated by a drive (6), each scraper (11,15'-20') being moved under the effect of a control unit.