Abstract: An accelerometer (1) disposed on the support tower (12) of a wind turbine electric generating system in the vicinity of the rotor (10, 16) thereof provides a signal (1) indicative of acceleration of the tower in the direction of the rotor rotational axis. The signal (2) is passed through a band-pass filter (4) for summation (9) with a torque/power controlled (100) blade pitch angle reference rate signal (98), the integral (104) of which provides a blade pitch angle reference signal (40) to control the pitch angle of the rotor blades (10) through a pitch change mechanism (38), thereby to provide additional, positive aerodynamic damping to the tower while modulating blade angle for constant torque/power in response to wind turbulence.

Abstract: A wrist watch, particularly a water-tight wrist watch, has upper and lower housing parts, a watch mechanism received in the lower housing part, a watch glass, a dial member, a spacer member, and an elastic element in the lower housing part arranged so that the upper housing part presses the watch mechanism via the watch glass, the spacer member and the dial member against the elastic element. The upper housing part has a collar extending over the spacer member and lying on a step portion of the watch glass.

Abstract: A compact electronic device having a calendar function wherein initial data for setting a plurality of specified dates and setting data for setting a plurality of specified dates based on the initial data are input by a key input section. Then, dates to be set as specified dates are calculated by a RAM, a control section and an operation circuit according to the input initial and setting data. The calculated dates are stored in a memory so that the plurality of specified dates may be set.

Abstract: A timepiece push-button structure comprising a spring member composed of tongue portions interconnected by a connection portion, each tongue portion being bridge-shaped so that the central portion is raised while both end portions of the central portion abut against a pressure conductive rubber holder, each tongue portion further including a substantially centrally located arcuate notch and a bifurcation extending therefrom. A push-button having a groove is adapted to engage said notch, and a pressure conductive rubber is adapted for the application of pressure and disposed directly below the push-button.

Abstract: A method and apparatus for accurately controlling a timekeeping apparatus utilizing a relatively heavy free pendulum or other harmonic structure carrying a permanent magnet, and a powered harmonic structure carrying a ferromagnetic element. The magnet is positioned on its carrier in a manner to effect energy transfer between the pendulums or structures during intermittent periods of magnetic attraction as the two structures oscillate. The free structure governs the speed of oscillation of the powered structure to maintain accurate control over the latter and energy transferred from the powered structure to the free structure maintains continued oscillation of the governing, free structure.

Abstract: A manhole cover lifter comprising an elongate inclined lever with a handle at its upper end and a fastener at its lower end for attaching to the cover of a manhole; a depending strut intermediate the ends of the lever and a pair of wheels mounted at the lower end of the strut and on a transverse axis forming a fulcrum for the lifting lever; a lifter bar connecting the wheel axle with the forward end of the lifter bar, the lifting lever being of tubular steel and a stiffener bar in the tubular lever at the upper end of the depending strut; and a handle at the upper end of the lifting lever.

Abstract: Temporary storage for flexible underlayments or press supports being transported in the manufacture of chipboard is provided by dragging the underlayments over a storage pit into which their rear ends are allowed to drop. Protruding ends of head leaders by which the supports are dragged by longitudinally moving catches, are inserted in a rack having stacked ledges disposed on both sides of the path of travel of the press supports. The rack is indexed downwardly one step at a time as each head leader is inserted into the rack to stack the press supports one above the other in the pit. Press supports are retrieved from storage by raising the rack to realign the head leader with the path of travel of the transporting catches. The rack may be a rigid vertical stack of ledges, or it may constitute a paternoster-type elevator.