Abstract: The acceleration sensor is formed of a cylinder; an inertial member slidably mounted in the cylinder so as to be movable in the longitudinal direction of the cylinder; a conductive member fixed at least on an end surface of the inertial member facing one longitudinal end of the cylinder; a pair of electrodes fixed relative to the cylinder at one longitudinal end of the cylinder and which, when the conductive member of the inertial member makes contact with the electrodes, are caused to conduct via the conductive member; and an attracting member fixed relative to the cylinder near the other longitudinal end of the cylinder, for magnetically attracting the inertial member. The electrodes are formed by a metal sheet whose basal ends are held by an electrode holding member and whose front ends are protruding in the travel area of the inertial member, and one of planes of the metal sheet is disposed so that it faces to the inertial member.

Abstract: An accelerator sensor is formed of a cylinder of a conductive material, a magnetized inertial member mounted in the cylinder so as to be movable longitudinally of the cylinder, a conductive member mounted at least on the end surface of the inertial member that is located on the side of one longitudinal end of the cylinder, a pair of electrodes disposed at this one longitudinal end of the cylinder, and an attracting member disposed near the other longitudinal end of the cylinder wherein each of the electrodes has an end portion communicating to a terminal for a conductive wire and a front end which the conductive member makes contact with. Each electrode has a slit extended from the end portion to the front portion thereof. One side of the electrode divided by the slit is communicated to the terminal, and a resistor is installed between the other sides of the electrodes.

Abstract: An accelerator sensor comprising a cylinder of a conductive material, a magnetized inertial member mounted in the cylinder so as to be movable longitudinally of the cylinder, a conductive member mounted at least on the end surface of the inertial member that is on the side of one longitudinal end of the cylinder, a pair of electrodes disposed at this one longitudinal end of the cylinder, and an attracting member disposed near the other longitudinal end of the cylinder. When the conductive member of the inertial member comes into contact with the electrodes, these electrodes are caused to conduct via the conductive member. The attracting member is made of a magnetic material such that the attracting member and the inertial member are magnetically attracted toward each other. The cylinder is made of a copper alloy having a resistance temperature coefficient less than 3.times.10.sup.-3.

Abstract: An accelerator sensor comprising a cylinder of a conductive material, a magnetized inertial member mounted in the cylinder so as to be movable longitudinally of the cylinder, a conductive member mounted at least on the end surface of the inertial member that is on the side of one longitudinal end of the cylinder, a pair of electrodes disposed at this one longitudinal end of the cylinder, and an attracting member disposed near the other longitudinal end of the cylinder. When the conductive member of the inertial member comes into contact with the electrodes, these electrodes are caused to conduct via the conductive member. The attracting member is made of a magnetic material such that the attracting member and the inertial member are magnetically attracted toward each other. An electrical resistor is bridged between the electrodes. The electrodes and the resistor are fabricated integrally out of a synthetic resin by insert molding.

Abstract: An accelerator sensor comprises a cylinder of a conductive material, a magnetized inertial member mounted in the cylinder so as to be movable longitudinally of the cylinder, a conductive member mounted at least on one end surface of the inertial member that is on the side of one longitudinal end of the cylinder, a pair of electrodes disposed at this one longitudinal end of the cylinder, and an attracting member disposed near the other longitudinal end of the cylinder. When the conductive member of the inertial member comes into contact with the electrodes, these electrodes are caused to conduct via the conductive member. The attracting member is made of a magnetic material such that the attracting member and the inertial member are magnetically attracted toward each other. The cylinder has a thick wall portion at the end of the cylinder where the electrodes are located.

Abstract: An accelerator sensor comprising a cylinder of a conductive material, a magnetized inertial member mounted in the cylinder so as to be movable longitudinally of the cylinder, a conductive member mounted at least on one end surface of the inertial member that faces a first longitudinal end of the cylinder, a pair of electrodes disposed at the first longitudinal end of the cylinder, and an atracting member disposed near the other longitudinal end of the cylinder. When the conductive member of the inertial member comes into contact with the electrodes, these electrodes are caused to conduct via the conductive member. The attracting member is made of a magnetic material such that the attracting member and the inertial member are magnetically attracted toward each other. The sensor further comprises a coil for testing the operation of the sensor and an another coil capable of biasing magnetically the inertial member to compensate operation of the cylinder due to temperature.

Abstract: An acceleration sensor comprising a cylinder of a conductive material, a magnetized inertial member mounted in the cylinder so as to be movable longitudinally of the cylinder, a conductive member mounted at least on an end surface of the inertial member that is on a side of one longitudinal end of the cylinder, a pair of electrodes disposed at this one longitudinal end of the cylinder, and an attracting member disposed on a supporting device near the other longitudinal end of the cylinder. When the conductive member of the inertial member comes into contact with the electrodes, these electrodes are caused to conduct via the conductive member. The attracting member is made of a magnetic material such that the attracting member and the inertial member are magnetically attracted toward each other.

Abstract: Disclosed is a method of manufacturing an acceleration sensor including: a cylindrical body composed of a conductive material; a magnetized inertial body so charged in an interior of the cylindrical body as to be movable in the longitudinal direction of the cylindrical body; a conductive body provided on an end surface of at least one end of the magnetized inertial body in the longitudinal direction of the cylindrical body; a pair of electrodes disposed at one end in the longitudinal direction of the cylindrical body and made conductive through the conductive body when contacting the conductive body of the magnetized inertial body; and an attracting body composed of a magnetic material, disposed at the other end in the longitudinal direction of the cylindrical body and magnetically mutually attracting the magnetized inertial body, the method comprising the steps of: assembling the acceleration sensor by incorporating the inertial body before becoming the magnetized inertial body by magnetization; and magnetiz

Abstract: An hour chime clock has an hour-indicating hand and a plurality of display units disposed circumferentially around the hour-indicating hand at different hour positions. The display units are displaceable between two positions to display either an ornament or an hour numeral. At each hour, a melody chimes and the display units undergo a predetermined pattern of movements. After chiming the hour, the display unit at the present hour position is placed in a different display state from the display state of all the other display units.

Abstract: A device featuring an hour hand, a minute hand, and an operation indicating disk which are secured at the end of an hour hand shaft, a minute hand shaft, and a second hand shaft, respectively. The shafts are fitted coaxially and pass through a dial. The operation indicating disk is located at a central concave portion of the minute hand and a transparent cover is provided.

Abstract: A timepiece having a housing and at least one decorative element mounted for rotation relative to the housing. The mounting comprises a rotary member supporting the decorative element and rotatably mounted on a shaft connected to the housing, a stationary gear mounted on the shaft, a drive motor mounted on the rotary member for rotation therewith, and a pinion for engaging the drive motor with the stationary gear to effect rotation of the decorative element.

Abstract: An alarm timepiece the internal movements and electronic components of which can be arranged and accommodated more efficiently in that the alarm diaphragm with a piezo-electric element attached thereto is obliquely mounted within the frame of the timepiece to lean from the bottom of the timepiece frame against a rising part of the side of the frame. This arrangement taken in conjunction with a sound emitting opening situated between the outer circumference of the bottom and the rising part of the frame of the timepiece provide an unobstructed path for the alarm sound while taking advantage of otherwise vacant space within the internal movement and electronic component compartment of the timepiece.

Abstract: A stepping motor for use in a clock includes a rod core having an effective length L, and a coil wound around the rod core along the effective length L and having a thickness R defined between the center of the rod core and the outermost periphery of the coil. The effective length L and the thickness R satisfy the relation 10.ltoreq.L/R.ltoreq.40. A stator is magnetically connected between the ends of the rod core. A rotor is rotatably disposed between opposed magnetic poles of the stator, and the rotor has a circular shape of a radius r.sub.0 in the range of 1 to 2 mm. Electric pulses having a pulse width t in the range of 9 to 17mS are applied to the coil so that the stepping motor converts more than 20% of the electric energy of the pulses into rotational torque of the rotor.

Abstract: A small synchronous motor is provided with a stator winding wound around a stator core. Conversion efficiency is improved by setting the ratio of the coil length (L) to the thickness between the center of the core and the outer most periphery of the coil (R) to be L/R to 40.