Abstract: A digital electronic wristwatch is provided with an alarm which includes a piezoelectric crystal mounted to vibrate a watch element. The piezoelectric crystal is supplied with a pair of signals, each having a peak voltage equal to that of the battery, but one of these signals is inverted, resulting in a peak-to-peak voltage which is higher than that normally available from the batteries located within the wristwatch housing. Such driving substantially increases the sound output of the crystal due to the effective voltage increase. A unique spring contact arrangement is used to connect the piezoelectric crystal to the watch electronics, and to permit easy removal of the piezoelectric crystal for battery replacement or watch repair. In addition, a flexible mounting arrangement increases the sound output from the alarm while providing water and dust protection for the watch.

Abstract: A feeder for magnetic components comprising a hopper adapted to receive the components, first and second magnets mounted for pivotal movement about first and second pivot axes, respectively, and a mechanism for oscillating the magnets. The hopper has an outlet and the oscillation of the magnets moves the magnetic components in the hopper toward the outlet. A pickup wheel is provided at the outlet for removing the components from the hopper.