An alarm timepiece is capable of providing an alarm sound twice, one time well before the announcement time and the other at sharply the alarm announcement time. The alarm time-piece includes a first register for storing preset points in time in which to actuate the main alarm; a second register for storing a given length of preparatory time a decision circuit for determining when provide a precautionary alarm as well as the subject alarm time through calculation on said preset points in time, u...

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.

A small alarm timepiece having a timepiece movement, an electrically operating buzzer as an acoustic alarm signal delivery means, a battery detachably mounted on the timepiece movement for energizing said buzzer for its operation, and an alarm switch for on-off control of the operation of the buzzer. This alarm switch is operatively connected with the movement so as to be closed at a preset time point and to remain closed for a certain predetermined operation period. The drive circuit for the bu...

A watch with an electronic buzzer which comprises a double-constructed back cover including an inner back cover on which a piezoelectric element is mounted to produce a mechanical buzz sound when a voltage is applied thereto and an outer back cover provided with a plurality of small holes for enhancing transmission of the buzz. A driving circuit for actuating or energizing the piezoelectric element is disposed in the watch case releasably from the back cover and the piezoelectric element. This c...

A vocal announcing device for an electronic timepiece in which background sounds are overlappingly performed with vocal announcement during vocal announcement, in which indicated time of timepiece is not only vocally announced but also background sounds are performed to overlap the vocal announcement, and in which background sounds are performed to overlap vocal alarming sounds of timepiece.

An electric alarm watch with an electro-optical display and an alarm mechanism which is released by a time-selecting device including a manually displaceable time-selector mounted for movement to different positions corresponding to the time of day for selecting the time at which the alarm goes off. At each position of the time-selector a particular set or combination of electrically conducting members is engaged by an electrically conducting zone or brush for producing an electronic signal whic...

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 ins...

A ground proximity warning system for aircraft having flight path angle based warning criteria generates a warning in the event of an excessively steep flight path angle during an approach to a landing. The warning criteria are altered to provide an earlier warning upon the occurrence of a low intensity wind shear or a below glideslope condition. A below glideslope warning system that is biased as a function of decreasing performance shear is also provided. A descent rate based warning system us...

An alarm timepiece the internal movements and electronic components of which can be arranged and accommodated more efficiently in that the alarm diaphragm with a piezo-electric element attached thereto is obliquely mounted within the frame of the timepiece to lean from the bottom of the timepiece frame against a rising part of the side of the frame. This arrangement taken in conjunction with a sound emitting opening situated between the outer circumference of the bottom and the rising part of th...

The disclosed memory enhancing apparatus includes an oscillating section for generating a plurality of first signals. A counting section is coupled to the oscillating section for receiving the first signals and responsively generating a plurality of second signals having time intervals therebetween, each of the time intervals having a duration different from that of the immediately preceding interval. A dividing section is coupled to the counting section and includes means for varying the freque...