This application describes a rotation-only CT scanner with beam deflections; the deflection and the rotation being so related as to permit the derivation of absorption data in groups focussed on respective "pivot points" outside the detector locus. Data derived from different detectors, but focussed on the same pivot point, relate to groups of paths, some of which overlap, and the overlap is used ...

A device for reconstructing the absorption distribution in a three-dimensional body. The body to be examined is imaged from two groups of radiation source positions. Each group of radiation source positions is situated on an arc of a circle around the axis of rotation, and the acrs of a circle determine the dimensions of the region in which the absorption distribution is reconstructed. The detecto...

A spring locking device for preventing unauthorized adjustment of the spring force subsequent to an adjustment conducted by a person having skill in the art. The spring locking device is composed of a seal which is positioned in a blocking relation with respect to the adjusting member and will be either totally destroyed if an effort is made to adjust the force of the spring or at least reflect th...

A technique is disclosed for locating the exact machine cycle, in a cyclic operation for a data processor, where an error occurs. Each cycle of the data processor is identified and counted as a cycle where the machine stopped with an error indication that is recorded. The cycles are then all caused to reoccur up to the cycle just preceding that cycle recorded and the machine is caused to stop with...

A closed cell phenolic foam having a cell structure in which the cell walls are substantially free of both ruptures and perforations is made by foaming and curing a foamable phenolic resole composition containing an aqueous phenol formaldehyde resole, a surfactant, a blowing agent and optionally other additives, with an acid foaming and curing agent which is an anhydrous aryl sulfonic acid which h...

An aqueous phenol formaldehyde resole, suitable for use in the manufacture of phenolic foam insulation, has a molar ratio of formaldehyde to phenol in the range of from about 1.7:1 to about 2.3:1, and a weight average molecular weight greater than 800. Preferably, the resole also has a number average molecular weight greater than 350 and a dispersivity greater than about 1.7. Phenol formaldehyde r...

A foamable phenolic resole composition is foamed and cured with an acid curing agent which is an anhydrous aryl sulfonic acid which has a pKa of less than about 2.0 and which reduces the compatibility of the resole with water, e.g. benzene, toluene or xylene sulfonic acids. The phenolic foam formed has cell walls which are substantially free of perforations. The preferred anhydrous aryl sulfonic a...

The drive shaft of a motor can be coupled to an output shaft by an electromagnetically activated friction clutch. The output shaft can be braked by an electromagnetically activated friction brake. The motor drive shaft rotates at constant speed. The rotary speed of the output shaft is regulated by negative-feedback action to maintain a selected value, by activating the clutch and brake alternately...

LE PRESENT DISPOSITIF PERMET, LORS DE LA RETROGRADATION, DE RELANCER LE MOTEUR AFIN QUE LA VITESSE DE L'ARBRE PRIMAIRE DE LA BOITE MECANIQUE SOIT TRES PROCHE DE LA SYNCHRONISATION AVEC L'ARBRE DE SORTIE. CE DISPOSITIF PERMET DONC D'EVITER L'OPERATION DELICATE DITE "TALON-POINTE". LE DISPOSITIF COMPORTE UNE LOGIQUE QUI PREND EN COMPTE LES INFORMATIONS DE FREINAGE, DEBRAYAGE ET PASSAGE AU POINT M...

A closed cell phenolic foam having a cell structure in which the cell walls are substantially free of both ruptures and perforations is made by foaming and curing a foamable phenolic resole composition containing an aqueous phenol formaldehyde resole, a surfactant, a blowing agent and optionally other additives, with an acid foaming and curing agent which is an anhydrous aryl sulfonic acid which h...

An aqueous phenol formaldehyde resole, suitable for use in the manufacture of phenolic foam insulation, has a molar ratio of formaldehyde to phenol in the range of from about 1.7:1 to about 2.3:1, and a weight average molecular weight greater than 800. Preferably, the resole also has a number average molecular weight greater than 350 and a dispersivity greater than about 1.7. Phenol formaldehyde r...

A foamable phenolic resole composition is foamed and cured with an acid curing agent which is an anhydrous aryl sulfonic acid which has a pKa of less than about 2.0 and which reduces the compatibility of the resole with water, e.g. benzene, toluene or xylene sulfonic acids. The phenolic foam formed has cell walls which are substantially free of perforations. The preferred anhydrous aryl sulfonic a...

L'INVENTION CONCERNE UN DISPOSITIF DE MEMOIRE A SEMI-CONDUCTEURS ET UN PROCEDE POUR SA FABRICATION.

LE DISPOSITIF COMPORTE DES RESEAUX M-ARY DE CELLULES DE MEMOIRE M-CEL CONTENANT UN TRANSISTOR MISFET Q ET UN CONDENSATEUR C, DES RESEAUX FICTIFS D-ARY COMPORTANT CHACUN DES CELLULES FICTIVES D-CEL FOURNISSANT UN NIVEAU DE REFERENCE ET CONTENANT UN CONDENSATEUR C ET DES TRANSISTORS MISFET Q,...

An embossed interior finishing material having superior cigarette mark resistance, said material comprising (A) a base material (B) formed on said base material, a foamed and ultraviolet-cured undercoat layer obtained from a vinyl chloride polymer, a reactive plasticizer, a blowing agent and a light sensitizer, and (C) formed on said undercoat layer, an ultraviolet-cured top coat layer obtained fr...

A blast furnace having a refractory lining of concrete components each having a volume of at least 0.2 m3, and comprising an alumina-containing cement or slag, chromium oxide of very fine particle size and fired aluminum oxide of somewhat larger particle size, together functioning as a cement for a refractory aggregate, provides great resistance to the heat and abrasive conditions existing inside ...

UNE BORNE DESTINEE A CONNECTER UNE SOURCE D'ENERGIE ELECTRIQUE A UN DISPOSITIF DE CHAUFFAGE FORME PAR DES BANDES CONDUCTRICES 7, COMME DANS LE CAS DE VITRES A CHAUFFAGE ELECTRIQUE, COMPREND NOTAMMENT UNE PLAQUETTE 1 MUNIE DE SAILLIES 5 A SOMMET PLAT. ON RELIE LA PLAQUETTE A UNE BANDE CONDUCTRICE PAR UNE COLLE NON CONDUCTRICE 6. LA CONDUCTION ELECTRIQUE EST OBTENUE PAR LE CONTACT ENTRE LA BANDE ...