Abstract: A two- or three-component measuring accelerometer based on an operating principle entirely different from that of conventional accelerometers is realized with a simple arrangement and provided as a two- or three-component measuring seismometer. Planar optical fiber rolls (2) whose light propagation characteristics change sensitively in response to changes in the pressure applied thereto are split into more than three separate sections and disposed at the bottom of a columnar or polygonal prism-shaped load member (1). Changes in acceleration acting on the load member (1) are measured on the basis of differences between the light propagation characteristics of the split optical fiber rolls (2-1 to 2-4).

Abstract: An electronic parts mounting apparatus includes a plurality of parallel parts feeder units each of which accommodates a plurality of electronic parts and sequentially feeds the electronic parts to a predetermined parts pickup position; the parts feeder units being arranged in parallel so as to form a parts feeding section; a positioning device for positioning a member on which the electronic parts are to be mounted; a parts mounting device which seizes each of the electronic parts at a predetermined position of the parts feeding section and which mounts each of the electronic parts on the member; and a detection device for detecting a distal end of each of the parts feeder units so as to determine whether a particular parts feeder unit deviates from a present position.

Abstract: An electronic component mounting apparatus has a movable table on which plural component supply units are arranged in parallel. Each of the component supply units accommodate an electronic component to be mounted on a component mounting member. A guide frame supports the table to move in a direction intersecting perpendicularly to a component supply direction of the component supply unit. A driving shaft is arranged in the direction intersecting perpendicularly to the component supply direction of the component supply unit for moving the table. A positioning device positions the component mounting member. A component mounting device holds the components and mounts the components on the mounting member, and a support member supports the driving shaft at a middle thereof.

Abstract: A component mounting apparatus which comprises at least first and second component supply assemblies mounted on respective movable tables that are mounted on a common track for movement therealong. The apparatus also comprises at least one positioning device for positioning a printed circuit board on which components are desired to be mounted; at least one component mounting unit for receiving a component at a predetermined position of the component supply assembly and mounting the component onto the support member; and a table moving mechanism which is selectively connectable with one of the first and second movable tables for driving the movable table along the common track.

Abstract: A method of mounting electronic components, comprising steps of: sucking an electronic component by a suction nozzle provided at the tip of a mounting head; holding the sucked electronic component in position by a centering device having an opening and closing mechanism and provided separately from the mounting head, and while holding the component applying adhesive to a side of the electronic component, the side being opposite to that sucked onto the suction nozzle; and mounting the electronic component to a designated position on a printed circuit board. The nozzles on the head are of different sizes.

Abstract: A watchcase comprises a case body, a bezel, and a support member affixed to the bezel for removably connecting the bezel to the case body so as to permit easy removal and replacement of the bezel. The support member has at diametrically opposite locations thereof outwardly extending flange portions, and corresponding recesses are provided in the case body at diametrically opposite locations for movably receiving therein respective ones of the flange portions with sufficient clearance therebetween to enable a sufficient extent of movement of the support member relative to the case body in the diametrical direction of the flange portions to permit removal and replacement of the bezel without deformation of either the case body or bezel. A deformable elastic member is interposed between the bezel, support member and case body and the elastic member is configured so as to undergo elastic deformation during removal and replacement of the bezel thereby preventing deformation of both the case body and bezel.

Abstract: A watchcase comprises a case body, a back cover connected to the back of the case body and a bezel connected to the top of the case body. A support member is connected to either the back cover or the bezel and comprises an outwardly extending flange, and oppositely disposed beads extending outwardly from the flange. The beads are configured to coact with recesses which are oppositely disposed in the inner surface of the case body so as to be received therein upon insertion of first one bead in its respective recess followed by the displacement of the support member relative to the case body so as to temporarily dispose the beads in extreme positions with respect to the recesses, and the beads are maintained in their respective recesses upon the return displacement of the support member so as to move the beads from their extreme positions. The beads are normally biased out of their extreme positions when inserted in the recesses.