A fume cupboard with a ventilated enclosure having an access opening along an edge of which is a cowling for improving containment of the cupboard. The cowling is shaped such that there is a streamlined air flow over the cowling into the enclosure the cowling having a sloped portion extending into the enclosure over which the streamlined flow is divergent with respect to the main air flow into the...

The method according to the present invention ensures a thermal decontamination of waste waters. The method comprises passing a combustible gas through said waste waters in the presence of surfactants. Said combustible gas is passed in an amount sufficient to convert said waste waters to a combustible foam; the surfactants are added to convert the entire volume of said waste waters to the combusti...

A shipborne system for clearing a channel through ice comprises in combination with a prow-mounted icebreaker shape, a giant siphon including an intake leading to an upward passage which inclines to the rear so that ice blocks taken into it at the bow float upwardly and rearwardly where they are discharged, either laterally or over the stern, leaving a broken channel behind the ship for passage of...

Automatic ultrasonic cleaning apparatus in which a single ultrasonic cleaning tank is alternately filled and drained with cleaning solution and rinsing solution and is supplied with drying air in accordance with a programmed cycle of operation.

A drilling tool for drilling a cylindrical borehole of relatively great depth in a soft material and then forming a conical enlargement adjacent the bottom of the borehole includes an axially elongated tool shank with a first drill at one end for cutting the cylindrical borehole and a second drill adjacent the first drill for cutting the conical enlargement. The second drill is formed of bit holde...

A method of reducing the effects of rotational motion and jitter of an object comprising forming a virtual image of the region or plane being examined at the center of rotation of the object by means of a lens or mirror fixed with respect to the object and viewing the virtual image of the region or plane. An optical system for viewing a region or plane of an object adapted to reduce the effects of...

Disclosed is a board made from fibrous material of vegetable origin, consisting of surface and base layers, wherein one of the base layers is made from activated sludge, the content of the components in the total mass of the board in percent by mass being as follows: -fibrous material 85-99.5 -activated sludge biomass 0.5-15.0 - The board may additionally contain a binding agent and a precipitat...

A pressure transducer is provided with a housing in which is mounted a pressure sensitive piezoelectric crystal for converting pressure changes of a rapidly moving gas to electrical signals. The crystal is mounted within the housing in a floating manner by a brass damping bar which damps extraneous acoustic oscillations. The hollow interior of the housing is filled with beeswax that surrounds the ...

A heat exchanger made of aluminum alloys comprising a tube made of an aluminum alloy consisting of 0.2 to 1.0 wt % of Cu and the balance Al and inevitable impurities, and fins jointed to the tube, at least a portion of each fin being formed from another aluminum alloy exhibiting and electrochemical potential value lower than that of the aluminum alloy from which the tube is made, so as to provide ...

Device for Connecting a Wiper Blade Holder to a Wiper Arm An adaptor (30,130,230,530,630) is provided for connecting different style windshield wiper arm ends (20,120,220,220A,320,420,520,620) to a cross-pin-type wiper blade (25) using the same principle of operation for locking the different style arm ends to the adaptor (30,130,230,530,630) prior to assembling the adaptor on the blade (25). A la...

A device for widthwise control of web material, comprises bar structure having resiliently bendable beam means for effecting a primary bowed adjustment. A set of side-by-side independent but cooperative wrap area members are carried by the beam means and are adapted to be individually selectively adjustable relative to the beam means to effect secondary adjustments incrementally at any of the memb...

A modified conductive ink is provided for a photoflash array having a plurality of high voltage flash lamps connected to a lamp firing circuit pattern deposited on a circuit board with radiation-sensitive switches and fuse elements being connected in said circuit pattern for sequential firing of said flash lamps, said fuse elements being provided by narrowing the width of the circuit pattern at th...

A ball sealer consists of an inner spherical rigid core of a desired density and an outer resilient or compliant continuous layer of uniform thickness which is comprised of a pair of hemispheric caps positioned about and secured to the core and to each other. The ball sealer is formed by molding a first cap in the form of a hemisphere having a central cavity adapted to receive one-half of an inner...

In a radiographic apparatus, a source of radiation is arranged to scan a planar spread of radiation in a plane about the body of a patient being examined. A plurality of detector devices is arranged to provide data representing the absorption of the radiation along a plurality of paths within the spread, for different orientations in the plane, for processing to determine a distribution of absorpt...

Electrical contacts to diffused regions in a semiconductor substrate are made by a process which reduces the space needed in memory or logic cell layouts. The contacts are made such that they overlap, but are insulated from, adjacent conductors. The contacts are formed in a manner which avoids shorting of the diffused junctions to adjacent structures without being limited by lithographic overlay t...

A thermal and acoustic insulating plate comprising an aminoplastic resin and a fiber reinforcement embedded therein in the form of a non-woven body of glass fibers extending uniformly throughout the entire volume of the plate. In preparing the plate a non-woven body of glass fibers is impregnated with aminoplastic resin, whereafter the resulting structure is expanded and cured in a mould by supply...

There is disclosed a transit vehicle brake control apparatus and method which determines a safe brake velocity for the vehicle in relation to a speed control relationship including roadway system design deceleration, the deceleration of the vehicle in relation to inertial space and the deceleration of the vehicle in relation to the roadway, when the actual speed is greater than the input command s...

Apparatus, and associated methodology, for testing an open in a pair from a shielded, multipair cable contaminated by water to correct the measured distance to the open from a measurement point and thereby obtain the true distance comprises: means (501) for applying an AC source (100) to the mate (101) of the open conductor (102); means (503,504) for detecting the resultant voltage induced on the ...