An improved electronic alarm watch is disclosed having improvements in the structure and arrangement of the accoustically alarming vibrator employed in the alarm mechanism thereof. The improved watch of the above type comprises a watch casing, wherein is located a watch movement, alarm switch controlled thereby, alarm oscillator circuit and a battery source adapted for energization thereof. An oscillatory membrane is fixedly attached with a piezo-electric or electro-strictive element which is electrically connected through the switch with the oscillator circuit and the battery for being energized therefrom, the membrane being arranged in a space defined by and between a perforated back cover and the watch movement.
This invention relates to an electronic alarm wristwatch wherein apertures are provided on the back cover to release alarm sound generating upon the coincidence of the time preset by an alarm-presetting device and that designated by a time display or time keeping means. A sound-emitting piezo-electric or electro-strictive element is fixed to the membrane which is dish-shaped and has a plurality of concentric wrinkles, said membrane is so placed in the watch case as not to waste any space and insures water- and dust-proofing. A distribution board is fixed to the wrinkled portion of said membrane to provide the required electric current, thereby providing an electric alarm watch which sounds freely and is not disturbed by oscillation of the wrist.
An alarm watch has an electro-acoustic transducer with a sound releasing cavity containing a vibrating plate for releasing an audible alarm sound. The surface of the vibrating plate exposed to the open air is treated with a water-repellant material having the property to shed or repel water so that when water enters into the sound releasing cavity and wets the vibrating plate, the vibrating plate readily throws off the water thereby obtaining rapid recovery of the alarm sounding function.
The present invention concerns a portable object such as, in particular, a timepiece (1) including means for controlling at least an electronic function such as an horological function, these control means including at least a touch-sensitive key (16) for selecting the desired electronic function, characterized in that the control means further include a strain gauge (22) allowing the selection of the desired electronic function to be confirmed and/or the electronic function to be activated, the confirmation and/or activation of said electronic function being effected by applying pressure to the portable object via the effect of which the strain gauge (22) generates a control signal which will be applied to an electronic data processing circuit, said portable object also being able to include means able to emit an acoustic signal to indicate to a user that the desired function has actually been switched on.
A wrist watch with an alarm having a vibratory plate supported at a point inside the bottom housing of the wrist watch. The vibratory plate comprises a piezoelectric element, a base electrode fixed on one side of the element. Audible time sound is emitted through the bottom housing, which produces transmitted vibrations by the application of AC voltage to the piezoelectric element.
An electronic wristwatch case construction in which a sound-emitting cover has a battery replacement hole and a plurality of sound-emitting holes. A fixing ring is disposed in concentric relationship with respect to the battery replacement hole of the sound-emitting cover, and a vibrating plate cooperating with a piezoelectric vibrating element for an alarm is spaced from the sound-emitting cover. A battery hatch is detachably fastened to the fixing ring, and a sealing ring is disposed between the battery hatch and the fixing ring to provide a water-tight sealing therebetween.
