Abstract: Provided are an actuator, method for manufacturing the actuator, and acoustic transmitter having the actuator. The actuator includes: an elastic metal member having a plurality of curved segments and a plurality of connection segments which constitute a ring structure with a long-axis direction and a short-axis direction; a multilayer piezoelectric member disposed within the ring structure and having a plurality of stacked piezoelectric units along the long-axis direction; and a plurality of coupling members disposed within the ring structure, wherein the multilayer piezoelectric member has two ends in the long-axis direction that are coupled to the connection segments of the elastic metal member in the long-axis direction. A preload stress is imparted to the elastic metal member. A plurality of coupling members having a size corresponding to the preload stress are disposed between the elastic metal member and the multilayer piezoelectric member.

Abstract: A transmission assembly used to connect with a rotatable ornament or a toy to provide bilateral rotations for achieving their cosmetic effect comprises a casing enclosing a set of three pinions which are driven by a battery-operated electrical circuit therein. An elastic rectangular bar used to restrict the rotary extent of a first pinion will elastically obstruct the rotary movement of the pinion in order to provide continuous bilateral rotation and each turn of the bilateral rotation will exceed 360.degree. without making any noise. The noses of the spindles of the pinions are formed as tapering sockets or as tapering pointed plugs to enhance the intensity of the assembly. Most of the components in this assembly are made integrally of plastic material so as to reduce the time and cost to manufacture.

Abstract: A ting actuating device for clock mechanism comprises generally a housing, a clock mechanism driven by a battery chamber and a circuit plate. A protrudent member is formed on the top surface of a minute wheel thereof in cooperation with a pair of a first and second conductor rods parallel disposed on a positioning plate inside the housing and toward the center of the minute wheel. The improvement has been characterized in that the conductor rods connect at one end to a power source and a load of musical sounding device where the first conductor rod is longer than that of the second conductor rod and extending exceeded the circularly travelling track of the protrudent member which pushes the first conductor rod upon each turn of the minute wheel, contacting the second conductor rod to switch on the load of musical sounding device to run hourly.

Abstract: A structure of clock comprises a main body having a clock mechanism on upper portion, a battery and circuit chamber on medial portion, a pendulum chamber on lower portion and an oscilatory control device on the top thereof. The pendulum has a tubular member at the top having a pair of corresponding right triangular recesses formed at two ends respectively, which are made in registry with the right triangular support members on the oscilatory control device. Because the right triangular support members are sizely smaller than that of the right triangular recesses, it is characterized in that when the triangular recesses suspend from the triangular support members, the oscilatory span of the pendulum is restricted by the oscilatory device.

Abstract: A structure of an ultrathin clock comprises generally a roughly rectangular housing having partitioned into a first chamber on upper portion for disposing a clockwork mechanism and a dial, a second chamber on median portion for disposing a set of electric circuit and batteries, and a third chamber on the lower portion for pivoting a pendulum therein and a cover which is snap fitted to the third chamber for securing the pendulum. The pendulum has a magnet on the upper end directly under an electric coil inside the second chamber so as to actuate the pendulum to swing laterally upon the variations of the electromagnetic field between the coil and the magnet. This invention has been characterized in the thickness of the housing which is greatly thiner than that of the prior art.