An electron emission system includes a high-brightness field-emitter cathode. Advantageously, the tip of the cathode is shaped to minimize structural variations caused by surface tension forces. In addition, an electrode assembly associated with the cathode is designed to establish electric field forces that are opposite and at least approximately equal to the surface tension forces acting on the ...

1. Miniature electric circuit breaker with moulded casing comprising : - a cut off chamber (30) enclosed by two electrodes (38, 40) to guide the arc, disposed to pick up an arc drawn between contacts (20, 22) when they get separated, - an electromagnetic trip device (28) having a coil (68) and a plunger (74) controlling a release latch (58) when a fault occurs to induce the automatic opening of sa...

Sterile net of elastomeric polyurethane, sterile wound dressings comprising an absorbent layer and a wound facing layer of the sterile net and methods of manufacture are described.

Circuitry for use in a hand-held electronic probe for passing high frequency current through malignant eye tissue of livestock or other tissue such as warts includes a thermistor in a probe tip that contacts the tissue, producing a voltage that controls a voltage controlled oscillator which drives an audio transducer. If, during treatment, the probe tip is held against the malignant tissue with su...

This invention relates to mixtures of polyols which are liquid at room temperature with functional aldoximes as blowing agents, wherein the aldoxime groups react with polyisocyanates to liberate carbon dioxide and are simultaneously incorporated by means of the functional group thereof into the polyurethane formed. The present invention also relates to a process for the production of polyurethane ...

The invention concerns novel compounds of the formula I I wherein: W are selected from the group consisting of: the groups R5-CO- and R5-CS- wherein: R5 is selected from alkenyl, alkynyl, benzyl, phenyl, substituted alkyl, substituted alkenyl, substituted alkynyl, substituted benzyl, substituted phenyl and the acetal, hemiacetal, oxime, imine and Schiff base derivatives of the group R5-C...

A sealing cap for mating to cylindrical parts such as the bolt guide of a spot-type disk brake. The cap includes a resilient boot one end portion of which is adapted to be secured circumferentially to a first cylindrical part and the other end portion of which is adapted to be secured circumferentially to a second cylindrical part. At least one of said end portion comprises a rigid insert member. ...

An automatic braking control system is capable of automatically maintaining a braking force once a vehicle has been stopped by the driver. The braking force is maintained until the clutch of the vehicle is engaged, at which time the force is automatically released so that the vehicle can be restarted. This system is especially useful for restarting a vehicle which has been stopped on an upward slo...

In a brake actuator device having a fluid pressure actuated service brake and a spring-applied, fluid pressure released auxiliary brake that cooperates with the service brake via a friction clutch mechanism, there is provided a manual release mechanism for releasing the spring-applied brake in the absence of fluid pressure. The manual release mechanism operates to relieve the tension of the actuat...

Heat-sterilizable films are made from a polymer blend of 10 to 60 wt % of a random propylene-ethylene copolymer containing from 1 to 6 wt % ethylene-derived units and 40 to 90 wt % of a linear low density polyethylene. The films are especially useful in the manufacture of collapsible parenteral solution bags and overwraps. A parenteral solution bag assembly comprises an inner sealed plastic film b...

A ratio controlling mechanism for a continuously variable transmission consisting of an input pulley combined with a hydraulic servomechanism for varying the effective diameter thereof, an output pulley combined with a hydraulic servomechanism for varying the effective diameter thereof and a V- belt extended between said output pulley and said input pulley, comprising an electronically- controlled...

A telemetering unit comprises a sheave over which a wire line is arranged to pass, e.g. up and down a borehole, a metering device which is driven by the sheave to provide data representing the rate of rotation and the direction of rotation of the sheave and a wireless transmitter for transmitting the said data to a remote point, the sheave driving a generator through step-up gearing to provide pow...

A method of preventing buckling of a drill string during drilling of a well in the earth comprises the steps of: (a) measuring the forces on, and the azimuth and inclination of, a segment of the drill string; (b) resolving said forces into the axial and normal compounds applied to the next shallower segment, said axial and normal components being related to measured azimuth and inclination of sa...

Apparatus for dispersing polymer powders, such as shown by the figure, comprising a funnel (1) with central filling inlet (2) in whose upper portion at least one tangential liquid inlet (3) is arranged, a funnel outlet tube (4) with annular nozzle (5) and a downstream jet pump (6), and process for dissolving polymer powders, characterised in that the polymer powder is dispersed in the apparatus de...

A method for producing a multi-component, porous PTFE article. Components of PTFE containing a liquid lubricant are placed in intimate contact, dried and then stretched in one or more directions. The PTFE components may optionally contain a filler. The resultant product has a virtually uninterrupted structure at the join and possesses very high bond strengths.

A drive unit is disclosed having interlocking members for directly connecting angularly disposed drive and driven shafts. The interlocking members comprise conventional pinion mate and side gear blanks supported in a standard differential housing driven by a drive shaft through a ring and pinion gear set. Pinion mate gear blanks are connected by the usual cross shaft to the differential housing. S...

A gear differential is disclosed for supplying driving torque from an input shaft to a pair of aligned axially spaced output shafts, including a carrier housing driven by the input shaft and having a center section and a pair of end cover sections, a pair of side gears journalled in opposite ends of the center section for splined connection with the output shafts, respectively, and pairs of differ...