Abstract: The present invention offers an adjustable, versatile windless windchime activation device, which can be modified to accept and activate many different varieties of windchime assemblies. The magnetic repulsive force between an electromagnet located within the windchime activation device and a permanent magnet positioned on a sail, which sail attaches to the sound inducing member of a windchime assembly, activates the windchimes in the absence of wind.

Abstract: A doorbell mechanism includes a triggering board and a main body of a conventional doorbell. The triggering board has a magnet-sensible device and a decorative doorknocker. The magnet-sensible device and the decorative doorknocker are respectively provided with a magnet, and the doorbell can be switched on or off by means of the interaction of the magnetic fields of the magnet-sensible device and the decorative doorknocker. The decorative doorknocker can be provided with an elongate pulling piece convenient for a short person or a kid to use.

Abstract: A multi-tone sounder system including the sounder and a method of controlling the sounder in which at least a pair of chime bars (3, 5), bells or gongs are spaced apart and arranged to be struck by a solenoid operated striker (26) positioned between the chime bars; the solenoid (24) is powered by a controller (FIG. 2) in one of several ways so that in one way by sudden application of power to the solenoid the striker strikes one bar but then the power is reduced gradually preventing the striker by means of a spring (28) hitting the other bar; in a second way by gradual application of power to the solenoid and sudden reduction the other bar only is struck; in a third way by sudden application and a sudden reduction of power to the solenoid both bars may be struck; by using a predetermined combination of strikes a particular push button in a house can easily be identified.