Abstract: Process for the preparation of a composite material incorporating an inorganic matrix in which are distributed inclusions of carbon-containing material, where it comprises the following stages:(a) mixing an inorganic powder with a liquid or viscous resin, which can be transformed into vitreous carbon by heat treatment,(b) subjecting the mixture of resin and inorganic powder to a first heat treatment performed under conditions such that the resin is hardened by crosslinking or polycondensation, and(c) subjecting the thus obtained hardened product to a second heat treatment for transforming the resin into vitreous carbon and thus forming said vitreous carbon inclusions.The composite material obtained comprises a copper matrix in which are uniformly and homogeneously dispersed vitreous carbon inclusions, the vitreous carbon content being at the most 8% by weight.The material is used in the production of electric contacts.

Abstract: A tamperproof dispenser end closure includes a base and a rotor pivotally connected to the base by a hub. The base and rotor have webs provided with means defining respective dispensing apertures. The base and rotor are retained in a close superposed relationship to each other by the hub. Frangible means are provided which tear or break when an attempt is made to separate the base from the rotor so that the base and rotor cannot be pivotally connected again by the hub.

Abstract: A pergola having a top comprising a plurality of wooden strips aligned in parallel relationship with a bottom planar face inclined to the mutually parallel side faces so as to provide a support orientation easily determinable and effective to provide differential shading from the sun by reason of the change in inclination of the sun during the seasons of the year.

Abstract: An ice-cream making machine has a container (3) for the ice cream and a motor-driven stirrer (4) located within the container (3), which is cooled by Peltier effect thermo-elements (8) each having a flat side in contact with a wall of the container (3) and an opposite flat side in contact with a heat dissipation member (9). The Peltier effect thermo-elements (8) are located between the bottom wall of the container (3) and the heat dissipation member and the lower surface of the container bottom wall has raised flat surface portions (11) in correspondence with the thermo-elements (89; the heat dissipation member has flat surface zones (9b) in contact with the thermo elements (8), and the surface area of each of the raised flat surface portions (11) and each of the said flat contact zones (9b) are at least equal to the surface area of each side of each Peltier effect thermo element (8).

Abstract: An adjustable kickout drive for forming machines is disclosed which can be adjusted while the machine is running. The drive includes a drive cam and a kickout lever, both of which oscillate about pivots. The drive cam is driven through a predetermined angle of oscillation from the main machine drive. The kickout lever is provided with a cam surface adjacent to the drive cam and a roller system is positioned between the cams so that the kickout lever oscillates through an angle in response to the oscillating rotation of the drive cam. The rollers are mounted on a lever, which is in turn pivoted on an adjusting screw which threads through a nut journaled on the machine frame. Rotation of the nut moves the screw, and in turn changes the position of the rollers with respect to the cam surfaces.

Abstract: A multiposition selector valve of the rotary type includes a valve body having a single inlet port and a plurality of outlet ports. Fluid communication between the inlet port and any one of the outlet ports is provided via a check valve assembly mounted on the valve body, and via a fluid-providing conduit connected at one end to the inlet port via the check valve. The other end of the conduit is movable in rotary fashion for fluidtight engagement with any one of a plurality of valve seat areas associated with the outlet ports. The valve seat areas are integral portions of a flat metal disk that can be removed from the valve body to facilitate maintenance of the valve. A single handle rotates the conduit through its various selected outlet positions and operates the check valve assembly to open and close the valve at selected outlet positions.

Abstract: Current provided to a generally constant impedance load is monitored to detect a predetermined load current decrease not resulting from normal load voltage fluctuations, such decrease indicating an abnormal increase in load impedance. A latching alarm is actuated when the predetermined load current decrease is detected. The degree of load current decrease tolerable without activating the alarm is determined by a user-adjustable percentage-of-change sensitivity control. A logic gate blocks alarm functions when the load current decreases to an abnormally low level. The disclosed device can be used to monitor the status of a line voltage energized heat trace cable constituted by a plurality of parallel-connected resistance wire heating elements. Multiple monitoring devices can be used in conjunction with a master alarm which can be reset without resetting the particular monitoring device alarm that triggered the master alarm.

Abstract: A pin inserter for inserting a plastic pin (7) through overlapped areas of shade cloth. The pin inserter has a handle (2) and a curved needle (3), with the pin having one end received in a recess (8) in the handle and its other end resting on the needle so it is slightly stressed to form a chord across the curvature of the needle.

Abstract: A blast nozzle for blowing-off liquids from surfaces, for example from sheet surfaces, has a tubular body, on the outer surface of which converging plate-like lips are provided which extend generally tangentially to form a blow-off slit which runs in an axially-parallel manner to the body. A plate-form cleaning element which may be moved relative to the blow-off slit is located in the body. The cleaning element is attached to a transmission which is adjusted by a drive provided outside the body. According to one embodiment, the cleaning element is a sheet which extends over practically the entire length of the blow-off slit and which may be selectively pushed into, and through, the blow-off slit, whereas according to another embodiment, it is a tongue which lies in the blow-off slit and which may be moved along that slit.

Abstract: A screw slot runner system for suspension ceiling grids is disclosed. The system provides runners having a central web, an enclosed bulb at the upper edge of the web, and a downwardly opened channel at the lower edge of the web. Opposing, inturned lips define the channel opening and permit insertion of T-bolts or the like to support accessories from the grid system. The runner connections are structured to provide a mitered type joint appearance even though a full miter joint is not provided. In one embodiment, separate end connector clips are provided to join main run runner modules, and the connector clips are provided with openings through which cross run end connectors project to interconnect the cross runs and main runs.

Abstract: In the invention, a digital signal consisting of upper and lower bits is sampled while the upper and lower bits are divided. The sampled digital signal components of upper and lower bits are converted into upper and lower pulse width signals having a pulse width responding to their data value, respectively. Thereafter, the upper and lower pulse width signals are mixed and pass through a smoothing filter to convert the digital signal into an analog signal. The upper pulse width signal is formed of a pulse signal varying in a pulse width in response to the data value of the upper bits relative to a center of pulse width which has a fixed time position within a sampling period. The lower pulse width signal is formed of a combination of pulse signals varying in each pulse width in response to the data value of the lower bits relative to each center of pulse width which is at each pulse edge of the upper pulse width signal.

Abstract: A band saw and an assembly having an interchangeable casing bearing the saw blade, the saw comprising a leading wheel and at least one led wheel on which the blade is mounted; one of the wheels can be moved by tensioning means between a blade-tensioning position and an action-taking position in which the assembly comprising the casing and the blade can be interchanged.

Abstract: A method and apparatus for installing a split fitting on an intermediate point of a pipeline. The apparatus includes remotely-controlled, power-operated manipulator elements operable to close segments of the fitting about the pipeline in the manner of a clamshell. The manipulator elements include cam means to initially close the fitting segments and C-clamp means to effect full closure of the fitting segments.

Abstract: A driving circuit for a brushless motor having a permanent-magnetic rotor is disclosed which is capable of positively carrying out starting of the motor and rapidly interrupting exciting current to protect the motor, when the rotor fails to rotate during the normal operation. The driving circuit includes transistor control circuits each including a capacitor, a PUT, and a capacitor charging circuit comprising a Zener diode and a resistor; and a resistor series circuit for flowing conductive signal current to a transistor switch which serves to supply current to exciting windings. The PUT is conductive to allow the transistor switch to be kept non-conductive when the capacitor is charged to a predetermined voltage.

Abstract: A method and apparatus are provided for washing elements of a printing press. In accordance with the method, the press and the ink supply pump are operated during the washing operation. Wash liquid is delivered to the press fountain and passed through the press in a cocurrent ink flow direction while effecting washing of those elements of the press normally contacted with ink. Wash liquid is also passed in a countercurrent ink flow direction through the ink supply line, and an ink filter if present, and introduced into the ink pump through its discharge line while it is being operated in order to wash the internal surfaces of the pump and ink supply line as well as the filter, if present. Wash liquid is also applied to the external surfaces of the pump. In all cases, the wash liquid is discharged after a single washing contact without recirculation.

Abstract: An adjustable bimetal snap disc thermostat is disclosed which provides conventional resistance-type heaters symmetrically positioned adjacent one side of the snap disc to allow adjustment of the operating temperature of the thermostat. The heaters are supported by heater terminals which extend up through the thermostat body and cover, and connect the cover to the thermostat body. The heaters and heater terminals are connected as a subassembly and subsequently installed as a unit in a device to minimize assembly costs. Further, since the heaters are conventional commercially available heaters, the cost of the heaters per se is minimized.

Abstract: A gas-fired burner of the radiant type includes a boardlike heating element constituted by a porous matrix of refractory fibers, the periphery of one side of the heating element being bonded to and in fluidtight engagement with an open end of a sheet metal box functioning as a gas plenum. A combustible gas mixture is fed into the plenum and forced through the porous heating element for burning at the outer face thereof. The boardlike heating element is retained in position by a strip of perforated metal fixed to the outer surface of the sheet metal box and extending about the edge of the heating element, the strip being bent over to hold the edge of the heating element against the box. A multilayer blanket of thermal insulating material wrapped around the sheet metal box is held in position by bent metal tabs and by the bent strip of perforated metal retaining the heating element. A low cost diffuser assembly ensures optimum gas mixture flow within the plenum.

Abstract: Apparatus for producing spine fin material of the type employing counter-rotating toothed cutter rolls to transversely slit ribbon stock. The apparatus includes a positive gear drive for controlling the angular cutter roll postions and a support arrangement permitting center-to-center adjustment of the cutter rolls independently of the center-to-center relation of associated gear drive elements.

Abstract: A control lever is distinctly movable in different planes for actuation of different control means. The control lever has, adjacent a control lever housing, a plate provided with a number of bevelled flat edges corresponding to the number of planes in which the control lever is movable. The plate is tiltable on its flat edges by means of movement of the lever on which is axially movable. A spring is provided between the plate and a fixed abutment on the lever for holding said lever in engagement with a seat and for urging said plate against a planar portion of the housing. When the lever is moved in a given direction, the plate is tilted or rocked about an edge against the action of the spring, with any risk of the lever moving in another undersired plane being effectively eliminated.

Abstract: Process for the liquid phase epitaxial deposition on a substrate of a ternary compound crystallizing in the same system as the substrate and complying with formula A.sub.x B.sub.n-x C.sub.m in which A, B and C are elements of the periodic classification of elements, n and m are integers, which can be the same or different, and x is between O and n, wherein said process comprises:(a) preparing an epitaxy bath by raising one of the elements A or B of the ternary compound and a stoichiometric solid binary compound of the two other elements of the ternary compound to a temperature such that there is formed with an excess of the said binary compound in the solid state, a liquid phase whose composition corresponds to the equilibrium with the solid phase A.sub.x B.sub.n-x C.sub.m,(b )contacting the bath with the substrate to be coated, and(c) depositing thereon, the ternary compound A.sub.x B.sub.n-x C.sub.m.