Abstract: The invention relates to a board game devised to exercise the powers of concentration and perceptive skill of two players. The board is provided with a grid pattern of apertures each having an identification such as B9, G7, H2, etc. The first player secretly draws two intersecting lines on a replica of the board and allocates one of four characteristics, for example, colors, to each of the four zones defined by the lines. The second player, by requesting to know the color zone allocated to chosen apertures, attempts to identify the point of intersection of the lines, using the identification of minimum possible number of apertures.

Abstract: A thermoplastic film is used to record data in the form of variations in molecular orientation of the polar molecules. The film is softened by heating and the data recorded, after which the film is cooled to retain the recorded molecular orientation.

Abstract: This disclosure relates to an atrioventricular electrode for the purpose of electrically stimulating the heart, for example, in conjunction with a pacemaker. The atrioventricular electrode includes a ventricular component and an atrial component, both carried by a common body. The atrial component, in its original form assumes a generally J-shaped configuration so that it may hook onto the atrial appendage at the time the ventricular component has the electrode thereof firmly engaged against the right ventricular wall. Restraining means are provided for, during the insertion of the atrioventricular electrode to restrain the atrial component in a substantially straight line relationship adjacent the ventricular component so as to facilitate the insertion of the atrioventricular electrode.

Abstract: A device for protecting an audio amplifier against overload or short circuit. The device includes an output amplifier comprising a plurality of branches having output transistors, a preamplifier to control the output amplifier, and means for limiting the current through the transistors at an allowable value. The device further includes means which, when the current through the output transistors exceeds this value, limit this current at this value, and means which, in the presence of such an unallowably high current in one of the branches, immediately disconnect the output amplifier irrespective of the fact that this current occurs in the one or in the other branch.

Abstract: The magnetic field produced by the periodic permanent magnets of a travelling wave tube is shaped to improve the transmission ratio of the electron beam. The first zero magnetic field occurs within the magnet region, and the first peak magnetic field occurs at the first minima of the diameter of the electron beam.

Abstract: An improved grill cleaning brush in which the cleaning of the grill ribs is effected by portions of the bristles intermediate the ends thereof, rather than the ends of the bristles. As a result, a more efficient cleaning of the grill ribs is effected. Further, the improved grill brush permits the application of additional pressure to the brush by providing a V-shaped construction of intermeshing brushes, with the bristles at the lower end of the brushes engaging the shank portion of the adjacent brush element.

Abstract: An artificial tree formed from an elongated trunk member having at least a tubular portion. A plurality of pairs of spaced-apart apertures are provided in the tubular portion. The pairs of spaced-apart apertures lie on an axis which is substantially coextensive to the long axis of the elongated member. A plurality of limb members, each having a connector end provided with engageable means, are detachably secured to a respective pair of the spaced-apart apertures.

Abstract: A travelling wave tube having a periodic permanent magnetic focusing structure is provided with ferromagnetic plates having copper inserts which conduct heat away from the electron beam path and reduce the formation of hot spots.

Abstract: This disclosure relates to an apparatus which will unload tubular members, such as cans carried by travelling supports of an endless conveyor at a very high rate. The apparatus includes a plurality of carriers mounted for rotation about a fixed axis and being reciprocable parallel to the axis. The carrier defines a pocket and the pocket cooperates with an outer guide surface to retain the tubular members in position as the carriers rotate about the axis. The apparatus includes access doors which facilitate the inspection of the apparatus and the removal of jams and adjustments for all guide surfaces wherein tubular members of different diameters or lengths may be readily accommodated.

Abstract: A calorimeter for measuring the latent energy of a sample at a pressure of at least 1,000 bars has a test chamber enclosed in a substantially adiabatic enclosure. It has thick walls able to withstand the very high pressure, and is connected by capillary tubing to means for holding it at a set pressure. The test chamber and a reference body which is thermally equivalent to the chamber are surrounded by respective adiabatic jackets and symmetrically arranged in an isothermal enclosure which is held at a set temperature. A differential gas thermometer has bulbs in contact with the test chamber and with the reference body, and a two-input differential pressure measuring unit has each input connected by a capillary tube to one of the bulbs. The pressure measuring unit has a manometer capsule with a respective input on each side of a flexible membrane, a capacitive pickup for sensing the position of the membrane, and electronic readout means. It is enclosed in a thermally insulative case.

Abstract: A separate mesh vidicon in which in order to reduce voltage pick-up from the scanning field by the conductor system which makes connection to the mesh and at the same time provide a tube which is relatively insensitive to rotation about its axis when positioned within its scanning yoke, connection to the mesh is made within the area occupied in operation, by the scanning field, by a cylindrical conductor surrounding the usually provided cylindrical anode, the remainder of the connection path being provided by a number of conductors arranged symmetrically about the axis of the tube, and an external removable link is provided bridging between the mesh terminal pin and the anode terminal so that the tube may be operated at will as a separate or integral mesh tube.

Abstract: This disclosure relates to a segmented retainer for rollers of a roller bearing. The retainer includes a pair of end rings having circumferentially spaced separator bars extending therebetween. The separator bars are fixedly secured to the end rings against displacement and rotation. Each separator bar has a configuration wherein at each side thereof there are two radially spaced bearing surfaces separated by a lubricant pocket. The convex shape of the bearing surfaces, in conjunction with the convex rolling surfaces of associated rollers provide for suitable lubricant pockets and lubricant flow thereby providing adequate lubrication between the roller and the separator bars. The bars are secured to the end rings by a plurality of different means including welding and interfitting mechanical interlocks.

Abstract: A mouldable thermoplastic material and process for making the same. The material comprises from 20% to 90% by weight of polypropylene, polyethylene or polyamide, from 80 to 10% by weight of glass fibre and from 0.05% to 15% by weight of an additive capable of coupling with the glass at a temperature in the range 180.degree. C to 300.degree. C and incapable of forming a homopolymer at that temperature.

Abstract: A method and a system for preventing the accumulation of polarized foreign particles on a support surface of support elements positioned in contact with a moving fabric in a paper making machine. An electrically conductive fabric support surface of a support element is charged with an electrical charge of like polarity to the polarized foreign particles whereby the polarized foreign particles will be repelled from the support surface.

Abstract: A capillary mass transfer device suitable for use as an artificial kidney or an artificial lung and includes a plurality of capillary tubes through which blood or other liquid to be treated may flow. The capillary tubes are carried by perforated supports which define passages in which the capillary tubes are disposed and through which a second fluid (dialysate) flows. The tubes are arranged in sets which are readily positioned within a split housing in a manner wherein the transfer device may be quickly and economically assembled.

Abstract: A control arrangement is described for angularly positioning a member such as an aerial structure in which a potentiometer has a continuous circumferential winding with two sets of tappings of at least two tappings and at least three tappings respectively the relative angular position of the two sets of tappings being variable in dependence upon the angular position of the member. Potentials are applied to one set of tappings and the potentials at the other set are compared with respective ones of a set of preset voltages representative of the desired position of the member. The member is driven to change its angular position until the result of comparison indicates that the desired position has been reached.

Abstract: This disclosure relates to a bearing unit wherein the rolling elements are supplied with at least one of the raceways, and wherein the rolling elements are formed of a magnetically attractable material and that raceway which is furnished with the rolling elements has been treated to have magnetic characteristics wherein the rolling elements are permanently magnetically attracted to the raceway by a force sufficient to overcome gravitational forces normally urging the rolling elements away from the raceway.

Abstract: The present invention relates to a clamping device of the kind comprising at least two jaws, at least one of which being movable to clamp one or more workpieces between the jaws, and at least one lever being pivotable in relation to the jaws and having two arms, one of which being actuated when moving the jaws towards each other in order to tend to pivot the lever and the other being arranged, when actuating said first arm, to exert a clamping force on the workpieces substantially perpendicularly to the direction of movement of the movable jaw, wherein said first arm of said lever is located between one of the jaws and the workpieces in order to be subjected to a compressive force via said workpieces when moving the jaws towards each other.

Abstract: A regulating dispenser comprises a hopper and a movable surface for withdrawing material from the bottom of the hopper to the outside thereof. The movable surface is constituted by at least one area arranged so that the regulating dispenser does not deliver over the whole of its width. A movable delivery regulating valve and a scraper independant of the valve and bearing on the movable withdrawing surface are provided. The scraper is fast to the fixed wall of the hopper and bears elastically on the movable surface so as to ensure sealing in said at least one area from which the dispenser does not deliver.

Abstract: A feeler for reading the contour of the rim of a spectacle frame has a reading head on a rod carried by a support which is linked by a ball joint to a fixed base. A cylindrical skirt on the support co-operates with the base and with a displacement detector which provides an indication which is employed to maintain contact of the rim with the reading head.