Abstract: The process for the manufacture of a plaster product comprises adding a u-formol or melamine-formol resin to a calcium sulphate base powder, the starting powder being constituted by partially hydrated calcium sulphate (plaster alone or with gypsum, or anhydrite with gypsum such as phosphogypsum). The percentage of resin, measured in weight of dry extract of the latter with respect to the weight of the dry extract of the powder to which it is added, is comprised between 1 and 5%. A powder-resin-water mixture is formed by a process of extrusion. The product thus formed is heated to a temperature comprised between 105.degree. and 120.degree. C. Articles having exceptional surface hardness and durability can be formed therefrom by a continuous extrusion.

Abstract: The invention relates to an optical fibre connector.A short segment of fibre with a diameter which is accurately known and which is held in the connector is connected by welding to the end of a very long transmission fibre.Application to telecommunications.

Abstract: A firearm that is preferably a revolver has an improved gain bolt construction, particularly for use in larger caliber weapons such as a 44 Magnum revolver. The gain bolt design indirectly assists the hand in particular in the final indexing of the cylinder. The revolver comprises a frame, a hand grip, a trigger, a hammer, a cylinder, and a hand arrangement for operating the cylinder. The trigger is pivotally supported in the frame and has a front flange for operating the bolt which is selectively moveable upon operation of the trigger to permit rotation of the cylinder and lock the cylinder in predetermined positions. The bolt is supported in a compartment forward of the trigger. The bolt includes a forward pivot end, a rear end engaged by a flange of the trigger, and a top lug which is adapted to be selectively locked with a slot in the cylinder in predetermined positions of the cylinder.

Abstract: The invention concerns balancing devices for rotating mobile pieces, using alancing weights attached as necessary to one of several collars. Each balancing weight has a beak engaging a groove of a collar and is secured to the rotor by a suitable fastener, such as a rivet. Following balancing, a ring abutting against the grooved face of the collar is set in place. The ring is equipped with uniformly distributed recesses each intended to form a socket for a balancing weight and one of the ends of its fastener, so as to prevent the ejection of any of these elements in case of a failure of the means of fixation. The ring cooperates with the rotor in forming a chamber, to retain the other end of the fastener. The invention is applicable to the balancing of any rotating mobile piece and particularly to that of the rotors of axial compressors.

Abstract: A braking correction device has a stepped bore which is divided into an inlet chamber and an outlet chamber by a piston. A control valve is disposed in a passage of the piston and is normally open when the piston occupies a rest position. When the pressure in the inlet chamber rises, the control valve remains open until such pressure has reached a predetermined value, and fluid communication between the inlet and outlet chambers through said control valve is metered when the pressure in the inlet chamber increases above said predetermined value. The piston is urged towards its rest position under the influence of a return force delivered by a control member connected to the suspension of the vehicle, and abutting the piston at its outer end. The inlet and outlet chambers can also communicate by a passage defined between the outer periphery of the piston and the inner surface of the bore.

Abstract: A disc brake includes a caliper which receives two friction elements. Opposed edges of a friction element and the caliper respectively define a gap therebetween. A noise reducing spring of the brake includes a pair of resilient opposed arms. The resilient arms of the spring fit into the gap and cooperate with the gap-defining edges to reduce brake noise. A mounting pin carried by the caliper supports the friction elements therein. An aperture defined by the spring receives the mounting pin so that the spring is pivotally mounted relative to the caliper and friction elements. Upon installation, the spring is placed in its inoperative position with its resilient arms disposed away from the gap. After the friction elements and mounting pins are in place, the spring is pivoted into place and a tab of the spring snaps into a recess of the caliper to lock the spring in its operative position.

Abstract: Feed cathode for an electrolytic cell with a feed conduit suited to pass a metal compound therethrough from a source to an electrolyte in the cell. The feed cathode includes a member surrounding and substantially entirely enclosing at least an outlet of the conduit. The member is at least partially formed of an electrically conductive foraminous body suited to pass the electrolyte and ions of a multivalent metal compound therethrough. Preferably, the foraminous body has an electrical coefficient of greater than zero to about 1 and a flow coefficient of from about 0.1 to about 300.

Abstract: The invention relates to a fluid reservoir with two compartments, more particularly for supplying hydraulic fluid to tandem master cylinders, this reservoir more specifically comprising two complementary, superjacent parts connected with adhesive, by thermowelding or by any other equivalent method, a central partition attached to the said parts and running across the longitudinal axis of the reservoir to divide the reservoir interior into two compartments having respective outlet orifices, at least one compartment also having a filler orifice, and the two compartments being interconnected by a transfer passage which extends into both of them and runs parallel to the surface of the fluid in the reservoir and substantially at the maximum level for this fluid. The transfer passage enables the hydraulic fluid to pass from one reservoir compartment into the other when the reservoir is filled with hydraulic fluid.

Abstract: A dashboard operable on an off position control for throttles of internal combustion driven vehicles.

Abstract: The bracket comprises two support members adapted to be secured to a wall or the like at spaced apart positions and two shaft means, each adapted to be removably coupled to one of the support members for supporting a roll of material for rotation between the two support members. Each support member comprises a body having a slot formed therein from one side to an opposite side. Each shaft means comprises a shaft portion adapted to be inserted into the axial opening at one end of the roll of material and a coupling portion having a slot formed therein from one side to an opposite side. A portion of the coupling portion of each shaft means is adapted to be removably received in the slot of one of the support members and a portion of the body of the corresponding support member is adapted to be removably received in the slot of the coupling portion of the shaft means whereby the shaft means may be removably interlocked with the support member.

Abstract: A hydraulic vehicle braking system including an operator-controlled fluid pressure source connected to the actuator of a vehicle wheel brake. An antiskid valve is interposed between the operator-controlled pressure source and the brake actuator and is responsive to wheel skidding to interrupt the fluid connection until the end of the braking phase and to permit a fluid connection between the brake actuator and a low pressure fluid reservoir in response to subsequent wheel skidding. The system includes a second source of pressurized fluid and a device for replenishing the brake actuator having a pressure responsive valve which opens fluid flow connection between the second fluid pressure source and the brake actuator when the pressure difference between the operator-controlled pressure source and the brake actuator exceeds a predetermined value.

Abstract: A prosthesis for use in valvuloplasty. The prosthesis is formed as a linear educer made of a material which is compatible with implantation and which in its direction of length is incompressible and inextensible but in the direction of its width is sufficiently flexible to assume a radius of curvature identical with that of the valvules; which can have needles introduced into it without tearing; which cannot be torn by the traction effect of the suture threads and of which the reduction ratio is governed by the distension of the deficient valvule. The prosthesis is intended for the surgical correction of certain mitral or tricuspid valvular disorders.

Abstract: A friction brake is equipped with an automatic adjuster (40, 44) and with a device (84, 86) indicating wear of the friction lining pads. The indicating device is associated with a movable member of the automatic adjuster and is also controlled by the automatic adjuster. The indicating device comprises a flexible blade (84) adapted to engage a rough cylindrical surface (86) formed on the hub (88) of the wheel associated with the brake.

Abstract: In accordance with the invention there is provided a blasting media, particularly useful for deflashing and deburring, consisting of small cylindrical pellets of a resin material containing from 1% to 8% by weight ethylene-carbon monoxide-vinyl acetate terpolymer and the remainder substantially all polycarbonate resin. Further in accordance with the invention, such blasting media is made by simultaneously heating and mixing a mixture of the polycarbonate resin and terpolymer in the proportions specified, to render the mixture molten, extruding the mixture to cylindrical shape and cutting the extruded mixture into pellets.

Abstract: The present invention encompasses a method for reducing offensive odors in poultry houses comprising adding at least 10 pounds of composted cow manure per ton of poultry manure. The method of the present invention substantially reduces offensive odor in poultry houses especially ammonia odor and thereby provides a healthier environment for poultry and poultry workers. Since the ammonia loss to the environment is reduced, the nitrogen is retained in the poultry manure providing a product with higher nitrogen content.

Abstract: Novel .alpha.-aryl-.alpha.,.alpha.-bis[.omega.-(disubstituted amino)alkyl]acetamides are described herein. The compounds are useful as anti-arrhythmic agents. The compounds are prepared by reacting an appropriate disubstituted acetonitrile with an appropriate haloalkyl amine and subsequently hydrolyzing the resulting nitrile with concentrated sulfuric acid.

Abstract: Power is generated using the temperature difference between the water at the surface of a large body of water whose temperature might be in the vicinity of 25.degree. C. or 77.degree. F., and water at considerable depth in the body of water whose temperature might be in the order of about 5.degree. C. or 41.degree. F. A floating structure is provided which extends in the order of 50 meters below the surface of the water, and input water is initially filtered and deaerated, and then drops for most of the height of the submerged structure before driving a conventional hydraulic turbine. The warm water at the output of the turbine is returned to the level of the surface of the body of water by a mist flow pump arrangement using a large tapered duct that is operated at reduced pressure, with droplets of the warm water from the output of the turbine being sprayed into the bottom of the duct.

Abstract: A picture retaining clip for use at the corners and along the sides of a back-loading picture frame, which clip also may serve as a means for hanging the frame. The clip is a strip of resilient material with a central web and bent ends. When the clip is mounted at the corners of the frame, a tab at each end of the clip abuts a forwardly raised ridge at the rear of the frame. When the clip is mounted along the side of the frame, a flange formed along the central web of the clip abuts either a forwardly raised ridge at the rear of the frame or a rearwardly raised ridge along the front of the frame. A hole and serrations in the central web of the clip receive hooks, nails, wire, and the like for hanging the frame.

Abstract: In a hot forming machine in which molding means deform a thermoplastic foil band and cutting and stamping means further process the deformed foil band. A photocell is adapted to scan marking indicia on the foil band and to adjust a lengthwise adjustable connecting member in accordance with such scanning. The connecting member forms part of an advancing arrangement for the transported foil band. This advancing arrangement includes a swing arm pivotally mounted in the machine; a first shaft mounted on the swing arm in proximity of the free end thereof; and an eccentric rigidly secured to the first shaft and pivotally connected to the connecting member which is also pivotally connected to the swing arm.