Abstract: A liquid filter apparatus in which a plurality of filter units are disposed in a vessel with each of the filter units comprising a perforated tube and a filter material extending around the tube. A collection manifold is located in the upper portion of the vessel and communicates with the tubes of the filter units for receiving the filtered liquid. A cover is provided separate from the manifold for the vessel and the filter units can be disposed into at least two groups extending in a vertically stacked relationship.

Abstract: In a double-acting rotary compressor having two compression spaces each constituted by at least one variable-volume compression chamber which is put into communication first with the suction enclosure and then with the discharge enclosure, the power consumption at low delivery is reduced by causing the two compression spaces to discharge in parallel into a common duct in the vicinity of maximum delivery and connecting the spaces in series for deliveries below a predetermined value by joining the outlet of the first space to the second space at a point at which the compression chamber is already isolated from the suction enclosure.

Abstract: A writing nib for pens and marking implements having an elongated body of generally rectangular configuration and reinforced by layers of relatively rigid solid material laminated to opposite surfaces of a relatively soft wicking material. The nib is formed by continuously forming layers of the relatively rigid material on opposite surfaces of a strip of wicking material, shaping both edges of the laminated strip and severing the laminated strip transversely, the shaped edges of the laminated strip ultimately forming a writing tip at each end of the nib body at which the wicking material projects beyond the corresponding ends of the rigid material.

Abstract: Crystalloidal pitch is obtained by subjecting solid pitch particles measuring not more than 5 mm in cross-sectional equivalent diameter to a treatment to prevent cohesion and subsequently bringing the cohesion-proof solid pitch particles into contact with a non-oxidative gas at temperatures of from 350.degree. C to 550.degree. C while maintaining a gas flow rate sufficient to provide a suspension wherein the gas constitutes at least 30% by volume. The crystalloid pitch is useful as a precursor for various carbon products.

Abstract: A catalyst for the oxidation of methacrolein into methylacrylic acid in the presence of steam having the composition:Pd.sub.a P.sub.b Sb.sub.c X.sub.d O.sub.ewherein, Pd, P, Sb and O denote palladium, phosphorus, antimony and oxygen respectively, X denotes at least one element selected from the group consisting of bismuth, lead, chromium, iron, nickel, cobalt, manganese, tin, uranium and barium, the subscripts a, b, c, d and e denote the numbers of the Pd, P, Sb, X and O atoms, with the proviso that the elements are present in a ratio so that when a is 1, b is 1 to 42, c is 0.1 to 15, d is 0 to 15 and e is a value which is automatically determined from the valencies of the other elements.

Abstract: In the thermal cracking of a heavy petroleum oil (having an API specific gravity of not more than 25) in a tubular type heating furnace, possible occurrence of coking trouble inside the furnace can be prevented by applying a magnetic field of fixed magnitude transversely to the flow of the heavy petroleum oil being introduced into the furnace or by applying a fixed magnitude of magnetic field transversely and, at the same time, applying a fixed magnitude of direct-current voltage parallel to the flow of the heavy petroleum oil being introduced into the furnace. More effective prevention of occurrence of coking can be obtained by having a specific inorganic substance incorporated in the heavy petroleum oil before the oil is subjected to the magnetic field or to simultaneous application of the magnetic field and voltage.

Abstract: An automatic test instrument for gaging the percentage of various constituents in organic substances by comparing the reflective optical density of the subject at various wavelengths. Narrow band optical filters are connected together in the form of a rotatable paddle wheel positioned so that the filters can be individually swept through the incident light path between the specimen and wideband light source. As the filter wheel turns, the band of light passed by each filter is progressively shifted with the changing angle of the filter relative to the light path. The filter wheel configuration includes opaque vanes extending from the ends of the filters to periodically interrupt the passage of light to the specimen. Photocells are positioned to sense the level of light reflected from the specimen. The output of the photocells is sampled at pedetermined times relative to the rotation of the filter wheel to yield values indicative of reflected intensity at certain wavelengths.

Abstract: The apparatus is a rotatable resistance heating furnace including a rotatable cylindrical body portion having an interior space in the form of a truncated cone. The base of the truncated cone forms a discharge opening for rapid discharge of the amorphous silica. The furnace is provided with a resistance heating element which extends into the furnace interior through a top opening. In one embodiment a slidable filling tube is provided for charging the furnace during rotation thereof. The process utilizes the above-described apparatus and involves heating the crystalline silica to a temperature sufficient to convert it to the amorphous state, evacuating the furnace during the conversion to draw off by-product gases, and rotating the furnace to a speed sufficient to bring about a separation between the silica charge and the resistance heating element.

Abstract: Flow divider for a powdery material, comprising a vertical duct supplied with said material. A knife with a separating upper edge is provided at the outlet of said duct to divide the inflow of said material into two outflows. At least one straight air passage is provided, lateral with respect to the vertical axis of the knife, between the inlets of two eduction chutes for said outflows. The level of said air passage is notably below that of said separating upper edge of the knife.

Abstract: The invention relates to a thermoelectric installation, in particular to a heat pump.This installation includes thermoelements mounted between thermal exchange walls belonging to hot exchangers through which a hot fluid circulates and cold exchangers through which a cold fluid circulates, said hot and cold exchangers alternating with thermoelements to form batteries arranged side by side or imbricated in such a way as to constitute a drawer of parallelepipedal appearance. A joint is provided at the level of each plane of thermoelements, this joint being constituted by a plate including the same number of apertures as there are thermoelements in said plane, this joint being nipped between the facing walls of the hot exchanger and of the cold exchanger and including, in addition, a peripheral rim acting in conjunction over the whole or part of its length with a bearing surface formed in the framework. A displacement mechanism is provided to produce a relative displacement between the drawer and the framework.

Abstract: A fluidized bed type spent activated carbon regenerator with an upper drying chamber and a lower reactivating chamber within a column through which spent activated carbon particles are treated in a fluidized state. The regenerator has a distributor at the lower end of a spent carbon feed pipe which opens into the upper chamber to distribute the feed of spent activated carbon uniformly on all sides of the feed pipe and over a larger area in the upper chamber. A hood is mounted around an upper end of a first overflow pipe which provides a passage to the lower chamber for carbon particles devolatilized in the upper chamber to block shortpasses of incompletely devolatilized carbon particles to the lower chamber. The regenerator is further provided with a louver strainer at the ceiling of the upper chamber to block fine carbon powder which tends to leave the regenerator entrained in upward streams of a regeneration gas flowing through the upper chamber toward a gas outlet at the top of the regenerator.

Abstract: The addition of organo germanium compounds having the formulaR.sub.3 GeX or (R.sub.3 Ge).sub.2 Ywherein R is an aliphatic or cycloaliphatic hydrocarbon group and X is an anion, such as carboxylate, sulphonate, halogen or hydroxyl, and Y is oxygen, sulphur, or sulphate, to conventional agents used in oral hygiene will significantly reduce the formation of plaque on teeth and thus reduce the incidence of caries. The preferred germanium compounds are the tri-n-butyl and tri-n-pentyl. The fluoride ion is the preferred anion because of its known anti-caries properties.

Abstract: A roll and an attachment using such a roll are disclosed for a road vehicle for forming a ditch by pressure in a rolling motion or shaping a pre-existing ditch by the same coaction. The roll member includes a centrally-located cylindrical surface adapted to form or to shape the base surface of a ditch and opposed shaping surfaces located on the opposite sides of the cylindrical surface for forming or shaping the opposed sidewalls of the ditch. The shaping surfaces may be conical or curvilinear, for example. Means are disclosed for removably securing the roll member to a road vehicle, such as an earth grader. A method for using such a member for forming or shaping a ditch is also enclosed.

Abstract: In a pressurized-water reactor (PWR), the top flange of the pressure vessel is penetrated by nozzles connected to vertical primary heat-exchangers which are located outside the vessel and above the level of connection. The heat exchangers and the primary circulating pumps are so arranged as to leave a free and unobstructed area above the reactor closure head, thus facilitating refuelling operations as well as remedial work on both pumps and heat exchangers in the event of a fault condition.

Abstract: A writing nib for pens and marking implements having an elongated body of generally rectangular configuration and reinforced by layers of relatively rigid solid material laminated to opposite surfaces of a relatively soft wicking material. The nib is formed by continuously forming layers of the relatively rigid material on opposite surfaces of a strip of wicking material, shaping both edges of the laminated strip and severing the laminated strip transversely, the shaped edges of the laminated strip ultimately forming a writing tip at each end of the nib body at which the wicking material projects beyond the corresponding ends of the rigid material.

Abstract: A handle or handgrip for a pole, especially a ski pole, comprising a guide surface for the thumb, the metacarpus (usually referred to as the palm of the hand) and the fingers. The guide surface embodies an upright wall extending approximately in the lengthwise direction of the handle and essentially in an axial plane or a plane substantially in parallelism therewith. The upright wall prevents grasping of the handle by means of the thumb and retains the thumb together with the palm of the hand and the base of each of the fingers to one side of the handle.

Abstract: An automatic test instrument for gaging the percentage of various constituents in organic substances by comparing the reflective optical density of the subject at various wavelengths. Narrow band optical filters are connected together in the form of a rotatable paddle wheel positioned so that the filters can be individually swept through the incident light path between the specimen and wideband light source. As the filter wheel turns, the band of light passed by each filter is progressively shifted with the changing angle of the filter relative to the light path. The filter wheel configuration includes opaque vanes extending from the ends of the filters to periodically interrupt the passage of light to the specimen. Photocells are positioned to sense the level of light reflected from the specimen. The output of the photocells is sampled at predetermined times relative to the rotation of the filter wheel to yield values indicative of reflected intensity at certain wavelengths.

Abstract: An intravenous catheter placement system in which a puncture needle and insertion catheter are disposed in guide passages formed in an easily handled blade-like body member. The body member is provided with guide track means cooperable with the needle in a manner to permit complete withdrawal and disposal of the needle after venipuncture to leave only the pliable insertion catheter remaining in the patient's vein. The needle may be either slotted to allow insertion of the catheter within the needle or provided with a pliable external sheath insertable with the needle and remaining after needle withdrawal to guide a small diameter insertion catheter for threading into the punctured vein. A catheter clamping means is provided to releasably retain the catheter against longitudinal movement in the body member which may be fixed to the exterior of the patient's body by a strap connected to the body or by taping.

Abstract: Method of coloring an organic material with a naphthacenequinone derivative having the formula: ##STR1## wherein R.sub.1 and R.sub.3 are members selected from the group consisting of hydrogen, chlorine, hydroxyl or amino, R.sub.2 is a member selected from the group consisting of carboxyl or its derivative, sulfonamide, sulfonate and phenylsulfonate, X is a member selected from the group consisting of hydrazo and aromatic diamino.Organic materials with the compound have a brilliant hue with characteristic fluorescence and high sublimation fastness.

Abstract: A transmission device comprising a first rotary element having two rolling friction surfaces which are of revolution about the axis of rotation of the element, or first axis, and having a center of symmetry located on the first axis, the two surfaces of the first element each being in frictional contact at a single point with one or the other of two rolling friction surfaces which are of revolution about a common axis of rotation, or second axis, and have a center of symmetry located on said second axis, the first axis and the second axis being inclined with respect to each other at an angle a and contained in the same plane, wherein the center of symmetry of the surfaces of revolution of the first element and the center of symmetry of the surfaces of revolution which are in contact with the first element are coincident at the same point S, the two surfaces of revolution about the second axis are formed on two parts connected to rotate with each other of a second element connected to a first shaft coaxial wit