ABRÉGÉ DESCRIPTIF Dans ce procédé de production d'oxygène gazeux sous une haute pression par distillation d'air dans une double colonne, pompage d'oxygène liquide soutiré en cuve de la colonne basse pression, et vaporisation de l'oxygène liquide comprimé par échange de chaleur avec de l'air porté à une haute pression d'air, on comprime à la haute pression d'air la totalité de l'air à distiller, on...

The invention relates to a method for testing a fitting (2a) driven by a solenoid (1a), which has a closing part (4a). It also relates to a device for testing such a fitting (2a). It is provided that during a switching process of the fitting (2a), the value of the current intensity (It) in the solenoid (1a) is recorded as operating current intensity (IA) at the time when the locking part (4a) star...

Biasing electrodes on a piezoelectric acoustic vibrator alter the sensitivity of the acoustic vibrator and can be used to compensate for external stresses applied to the acoustic vibrator. The biasing electrodes and the circuitry providing electric signals to them are separate from the RF circuitry feeding the RF signal electrodes of the acoustic vibrator. Biasing electrodes can be used on bulk ac...

A method for testing a valve being driven by an electromagnet having a magnet armature, includes determining a value of current intensity in the magnet as a response current intensity, at an instant when motion of the magnet armature of the valve begins during a switching action of the valve. A force acting through the magnet upon the magnet armature is determined from the determined response curr...

A television signal transmission system is used for transmitting an N-level video related data signal. The data signal is processed prior to transmission such that the majority of N-level symbols comprises a non-negative level for facilitating receiver lock-up. An in-phase pilot component may be added to the transmission by D.C. offsetting the processed signal to further facilitate the receiver lo...

A method of making a microwave reconstitutionable pizza including coating the outer peripheral edge of the pizza crust with a liquid crust coloring substance, which includes an aqueous solution of an edible dispersion agent and a natural occurring coloring agent selected from the class consisting of coffee, tea, chicory and mixtures thereof.

A method of making a microwave reconstitutionable pizza including coating the outer peripheral edge of the pizza crust with a liquid crust coloring substance, which includes an aqueous solution of an edible dispersion agent and a natural occurring coloring agent selected from the class consisting of coffee, tea, chicory and mixtures thereof.

It is known per se that covering of the depth of a bone with a polytetraethylene film can lead to formation of the bone substance in the depth which fills this depth. Hitherto, however, this technique for restoration of a jaw bone was restricted to shallow depths. For example, it was impossible with this method to induce new growth of bone between two teeth or between a tooth and a dental prosthes...

Avermectin analogs are disclosed wherein the 6,6-spiroketal ring system has been reduced in size to a 6,5-spiroketal ring system by the deletion of the 25-position carbon atom and the 25-alkyl substituent. This is accomplished by opening the outer spiroketal ring with the elimination of ring carbon atoms 23, 24 and 25 and the alkyl substituent at the 25-position and incorporation a new component, ...

EXTRUDED POROUS STRUCTURE A porous thermoplastic membrane structure having, in the absence of an external skin, a generally uniform porosity, such membrane structure being capable of withstanding a minimum burst pressure in excess of 5 bars.

A high efficiency illumination system having lighting fixtures in spaced apart relation, light reflector panels in the lighting fixtures having two side by side central curved portions and two curved side portions on respective sides of the central portions, and the central and side curved portions being angled to one another, lighting tube receptacles in the lighting fixtures to support at least ...

The invention is directed to a portable test device (10) for an electronic trip unit (12) which is electrically powered from the internal power supply (26) of the trip unit being tested. The test unit utilizes three leads connected to the trip unit. One of the leads (Vcc) connects to the voltage source for the trip unit and another lead (Gnd) connects to the ground potential to acquire power from ...

A polymer enhanced foam comprising a polymer selected from a synthetic polymer or a biopolymer, a surfactant, an aqueous solvent and a gas is injected into a fractured subterranean formation via a first well in fluid communication with the formation and preferentially enters fractures present in the formation. The injected polymer enhanced foam promotes the recovery of liquid hydrocarbons from sai...

Positioning actuator device (1) including a means (14) for connection to an operated member, a two-part operating rod (8, 9) guided in a sleeve (5) so that it can be moved axially therein, it being possible for the two parts (8, 9) of this rod to be connected to one another, by the matching of shapes, this being in the region of the sleeve (5), by means of a separating coupling exhibiting at least...

A transmission generates the travelling and PTO outputs of a farm tractor. The transmission can easily generate the travelling output of a 15-step forward movement and a 9-step backward movement and the output of a 4-step PTO by fractionalizing the number of speed changing steps. The transmission uses a large number of identically standardized gears and hub sleeves but reduces the number of built-...

a) Cleaning system comprising a suction source connected by a filter unit for filtering the indrawn air to a manifold (9) which has connection points (10) in the areas to be cleaned. b) System characterised in that the filter is composed of a chamber (3), at the top end of which is a pipe (2) connected to the suction source (1) and at the bottom end of which is an emptying port (6) closed by a val...

A cable drag chain including a series of hollow links for guiding and protecting cables, hoses or the like conduits, the conduits being connected between a stationary power supply and a movable machine member. Each link includes a pair of opposite link plates connected in parallel relation between upper and lower coupling bars made of a transparent synthetic resin to enable defects in the conduits...