Abstract: A light guide plate includes a glass substrate having a mark on a surface thereof and a refractive index of 1.7 or more. The mark includes a plurality of dots. Each dot is contained in a minimum circle having a diameter of 30 to 250 ?m. Each dot has raised portions higher than the surface at outermost and innermost peripheral edge portions having a height of 0.11 to 4 ?m. Each dot is composed of laser irradiation marks, each having a diameter of 10 to 40 ?m, and being in contact with or overlapping with each other. A specific loop shape, formed by the laser irradiation marks, having a diameter of a minimum circle containing the loop shape of 100 ?m or less, is configured as an open loop including an open portion having a length of one tenth to twice of a maximum diameter of the laser irradiation mark.

Abstract: A flat glass production apparatus includes a molten glass ribbon supply part supplying a continuous flow of molten glass to a forming part as a glass ribbon of a formable temperature; the forming part including a plurality of tension rollers for forming the glass ribbon of the formable temperature supplied from the molten glass ribbon supply part into a glass ribbon of an unformable temperature; and a carriage part carrying out the glass ribbon of the unformable temperature on a downstream side of the forming part.

Abstract: In the light control device according to one mode of the present invention, a plurality of liquid crystal optical elements are arrayed between two transparent plates having a curved surface, and the liquid crystal optical elements are bonded to a first transparent plate 11 by a gel, elastic, transparent resin layer. The liquid crystal optical elements and the second transparent plate have a sealed space formed therebetween. By using the gel, elastic, transparent resin layer to fix only one side of each of the liquid crystal optical elements to the first transparent plate, the liquid crystal optical elements are fixed to the curved surface of the first transparent plate, and a stress is prevented from being transmitted to the liquid crystal optical elements.

Abstract: There are provided a spherical bearing and a method for manufacturing the same, in which both of a ball bearing section and a ball section made of metal can make light and smooth swinging and rotary motions for a long period of time without biased wear and seize-up of those members even if the solid bodies of them can contact with each other due to a discontinuous oil film under a heavy load. A resin liner that contacts the ball section of the inner member in a sliding relationship is embedded in the ball bearing section, and a resin sliding contact surface provided by the resin liner and the metal sliding surface are adjacent to each other without any gap to form a sliding contact surface at the bearing section.

Abstract: An object of this invention is to provide a connecting rod in which a pair of ball-shanks are connected to a rod main body such that they are axially perpendicular to each other, having a sufficient strength and which can be produced easily and at low cost, and a manufacturing method thereof. The connecting rod of this invention to achieve such an object comprises first and second ball-shanks and a rod main body to which the first and second ball-shanks are connected freely swingably and rotatably. The first ball-shank is connected to the rod main body such that the shank portion is perpendicular thereto, while the second ball-shank is connected to the rod main body such that the shank is in parallel thereto. Further, the rod main body is die cast with a ball portion of each ball-shank inserted as a core.

Abstract: There are provided a spherical bearing and a method for manufacturing the same, in which both of a ball bearing section and a ball section made of metal can make light and smooth swinging and rotary motions for a long period of time without biased wear and seize-up of those members even if the solid bodies of them can contact with each other due to a discontinuous oil film under a heavy load. A resin liner that contacts the ball section of the inner member in a sliding relationship is embedded in the ball bearing section, and a resin sliding contact surface provided by the resin liner and the metal sliding surface are adjacent to each other without any gap to form a sliding contact surface at the bearing section.

Abstract: An object of this invention is to provide a connecting rod in which a pair of ball-shanks are connected to a rod main body such that they are axially perpendicular to each other, having a sufficient strength and which can be produced easily and at low cost, and a manufacturing method thereof. The connecting rod of this invention to achieve such an object comprises first and second ball-shanks and a rod main body to which the first and second ball-shanks are connected freely swingably and rotatably. The first ball-shank is connected to the rod main body such that the shank portion is perpendicular thereto, while the second ball-shank is connected to the rod main body such that the shank is in parallel thereto. Further, the rod main body is die cast with a ball portion of each ball-shank inserted as a core.

Abstract: There are provided a spherical bearing and a method for manufacturing the same, in which both of a ball bearing section and a ball section made of metal can make light and smooth swinging and rotary motions for a long period of time without biased wear and seize-up of those members even if the solid bodies of them can contact with each other due to a discontinuous oil film under a heavy load. A resin liner that contacts the ball section of the inner member in a sliding relationship is embedded in the ball bearing section, and a resin sliding contact surface provided by the resin liner and the metal sliding surface are adjacent to each other without any gap to form a sliding contact surface at the bearing section.

Abstract: A connecting rod includes first and second ball joints made of ball-shanks and holders tiltably connected with the ball-shanks. A connecting portion, which connects the holders of the first and second ball joints, adjusts the distance between the centers of the ball-shanks. The connecting portion includes first and second connecting arms integrally formed with the holders of the first and second ball joints and on which a plurality of positioning concaves and convexes which are meshed with each other are respectively arranged in a longitudinal direction. A fixing device engages the first and second connecting arms with each other in the condition where the positioning concaves and convexes of the first and second connecting arms mesh with each other.

Abstract: This manufacturing method comprises a first step in which a molten aluminum alloy is cast into casting dies into which a ball 8 forming a ball portion 1a of a ball-shank 1 in corporation with a shank 1b connected to the portion 1a is inserted as a core so that a holder 2 covering the ball portion 1a is formed leaving the connected portion of the shank 1b as it is; a second step in which the aluminum alloy for forming the holder 2 is subjected to a solution heat treatment; a third step in which the shank 1b is brought into pressure contact with the ball 8 exposed from the holder 2, electrodes 10a and 10b are held in contact with the shank 1b and the holder 2, respectively, and the ball 8 and the shank 1b are projection-welded by turning on electricity between electrodes to thereby form the ball-shank 1; and a fourth step in which an external force is applied to the holder 2 or the ball-shank 1 to thereby provide a gap between the ball 8 and the holder 2.

Abstract: A control circuit of an FM stereophonic receiver includes two sets of symmetrically arranged transistor pairs which form a DC supply regulating circuit therein and are connected to respective constant current sources. The control circuit receives an output signal from an FM detector and controls the coupling of the FM detector output to different input terminals of a switching circuit of the FM demodulator in response to a DC control signal indicative of the level of a received broadcast signal. The switching circuit receives a train of switching pulses of 38 kHz as a switching signal to derive a stereophonic or monophonic audio signal from the controllably applied FM detector output. The DC supply regulating circuit serves to maintain the DC level applied to the input terminals of the switching circuit at a constant value at all times to reduce noise which might occur in the reproduced audio signal when the receiver is switched over between the stereophonic and monophonic modes.