Abstract: A flying device is provided, including a disk configured to rotate around its axis, a ring in parallel with the disk, multiple loads coupled to the disk and the ring, multiple first pivots circularly arranged in the peripheral region of the disk and respectively coupled to the multiple loads, and multiple second pivots circularly arranged in the ring and respectively coupled to the multiple loads. The ring is positioned in parallel with the disk with a shift relative to the disk to follow the rotation of the disk through the loads, while keeping the position with respect to the disk. The rotation of the disk generates a centrifugal force biased in the direction of the shift, providing a force to move toward a direction determined by the shift.

Abstract: Laminates for electronic components are produced by applying a polyimide resin precursor solution containing a palladium compound on a polyimide substrate, drying the resulting coating to form a polyimide resin precursor layer, irradiating this layer with ultraviolet rays in the presence of a hydrogen donor to form nuclei for primer plating, forming a metal primer layer by electroless plating, and converting the polyimide resin precursor layer into a polyimide resin layer through imidation by heating either after or before the formation of a surface plating layer. The invention provides laminates for electronic components which are extremely improved in adhesion to metal layers without impairing the characteristics inherent in the substrate and are excellent in insulating properties, and polyimide resin precursor resin solution to be used in the production of the laminates.

Abstract: Laminates for electronic components are produced by applying a polyimide resin precursor solution containing a palladium compound on a polyimide substrate, drying the resulting coating to form a polyimide resin precursor layer, irradiating this layer with ultraviolet rays in the presence of a hydrogen donor to form nuclei for primer plating, forming a metal primer layer by electroless plating, and converting the polyimide resin precursor layer into a polyimide resin layer through imidation by heating either after or before the formation of a surface plating layer. The invention provides laminates for electronic components which are extremely improved in adhesion to metal layers without impairing the characteristics inherent in the substrate and are excellent in insulating properties, and polyimide resin precursor resin solution to be used in the production of the laminates.

Abstract: An optical fiber holder which is suitable for holding a plurality of optical fibers arranged side by side at uniform intervals is provided. This optical fiber holder includes a holder body and a presser member. The holder body has an optical fiber accommodating unit which accommodates connection portions of optical fibers respectively inserted in recess portions defined by first protrusions at uniform intervals. The presser member has second protrusions in positions corresponding to the first protrusions of the holder body, and covers the optical fiber accommodating unit. Thus, the optical fiber holder can hold a large number of optical fibers side by side at uniform intervals while maintaining high density.

Abstract: The invention concerns an etching liquid appropriate for etching thermoplastic polyimide resins. The etching liquid it is composed of an aliphatic amino-alcohol whose number of carbon is equal or inferior to 4 having an amino group or an imino group and a hydroxyl group in a molecular thereof, and a tetra alkyl ammonium hydroxide aqueous solution.

Abstract: An optical fiber holder which is suitable for holding a plurality of optical fibers arranged side by side at uniform intervals is provided. This optical fiber holder includes a holder body and a presser member. The holder body has an optical fiber accommodating unit which accommodates connection portions of optical fibers respectively inserted in recess portions defined by first protrusions at uniform intervals. The presser member has second protrusions in positions corresponding to the first protrusions of the holder body, and covers the optical fiber accommodating unit. Thus, the optical fiber holder can hold a large number of optical fibers side by side at uniform intervals while maintaining high density.

Abstract: An illuminated electrical part comprises a case, an indicator panel attached to the open front end of the case, a housing attached to the case so as to define an illuminating space behind the indicator panel, and an illuminating device comprising a light source disposed behind the indicator panel and mounted on the housing, and a cover formed of a highly heat-conductive material, fixed to the housing so as to cover the light source and provided with light control slits in its top wall extending between the indicator panel and the light source and with light control apertures in its opposite side walls. The numbers, shape and arrangement of the light control sliuts and the light control apertures are determined selectively so that the entire area of the indicator panel is illuminated uniformly by light emitted by the light source, scattered by the inner surface of the housing and shed through the light control slits and the light control apertures.

Abstract: There is disclosed a device for displaying the operation of a knob that is used for an automobile heater control unit, for example. The device has a frame in which a slider is mounted so as to be horizontally slidable. The knob is fixed to one end of the slider. A first light-conducting body that can be illuminated by a lamp to display the operation of the knob is so formed as to surround the slider and the knob. A second light-conducting body that can be illuminated by a second lamp to display the position of the knob is so mounted that the end of this body is located within the outer end surface of the knob. That is, the first light-conducting body is located around the second conducting body.

Abstract: A snap-attachable holder for holding a number of display elements is adapted to engage with the edge portion of a printed circuit board so that the holder does not add substantially to the thickness of the printed circuit board. The holder is of an L-shaped cross section and has vertical protrusions and pawls for aligning with and snappingly engaging to the printed circuit board. The holder further has guide slots for guiding the terminals of each display element so that they protrude upwardly in the same direction as the pawls.

Abstract: A fixture for a push-button switch which has an operating lever protrusive from one face of a box-shaped casing thereof, characterized by comprising a mounting frame which is substantially U-shaped in section and which is provided with an opening for leading out the operating lever of the push-button switch, one mounting surface of the mounting frame being provided with a plurality of bulges for positioning the push-button switch in engagement with the casing thereof, the other mounting surface being provided with a pair of tongues protrusive in a direction orthogonal to the moving direction of the operating lever, the pair of tongues being fastened in engagement with the casing of the push-button switch.

Abstract: A construction for attaching a knob to a manipulation rod of a push-button type actuating mechanism. The knob has a cap-like shape with an outer wall and an inner cylinder having a bore. A snapping protrusion is formed at the lower end of the inner peripheral surface of the outer wall. The snapping protrusion has a tapered section protruding inwardly from the inner peripheral surface of the outer wall and a snapping step formed on the inner peripheral surface of the outer wall. The manipulating rod has a flange formed at its intermediate portion and resilient tongues formed on the upper end thereof. As the rod in inserted into the bore of the inner cylinder of the knob, the outer peripheral surface of the flange slides along the tapered section of the snapping protrusion spreading the outer wall outwardly and then comes into snapping engagement with the snapping step.