Abstract: The invention provides a device for suppressing roaring of pet that enables the pet owner to control the action of the pet according to circumstances, with reduced power consumption and low running cost. A receiver 15 detects the barking of a dog, and based on the audio signal, it is set to receive mode for a predetermined period of time. When the pet owner hears the barking and determines that it is an unnecessary bark, he/she manipulates a transmitter 11. If the receiver 15 is at receive mode, when a signal is output from the receiver 15, a vibration unit 10 is activated, applying vibration to the pet and suppressing the roaring of the pet. If no signal from the transmitter 11 is received during the predetermined period of time, the receiver 15 enters a standby status. Thus, there is no need to supply power constantly to the receiver 15, and the power consumption of the receiver 15 can be cut down.

Abstract: A card body 2 has two battery holding sections (13, 14) inside, and two battery holders (9, 10) each containing a battery are housed therein. The two housed battery holders (9, 10) engage locking portions (22a, 22b) of a stopper (11), thereby setting them unremovable. When the stopper (11) is slid toward one battery holding section (14), the battery holder (10) therein is still kept unremovable, while the other battery holder (9) can be made removable. Thus, even during battery change, at least one battery always remains in the card body to keep supplying a backup voltage to a volatile memory.

Abstract: Voltage obtained by dividing the voltage of an external power source (101) by means of resistors (108, 109) is supplied to the gate of a first FET (107) that is interposed between two series-connected built-in batteries (103, 104). When the voltage at a predetermined level or above is supplied from the external power source (101), the first FET (107) is turned off, a second FET (110), which is provided between the built-in batteries (103, 104) and a load (113), is also turned off, and the voltage is supplied to the load (113) only from the external power source (101).

Abstract: An ink-jet printing head comprises a laminated unit integrally formed as a sintered ceramic product and including a bottom insulating plate element, a top insulating plate element, and a piezoelectric plate element between the bottom and top insulating plate element, the laminated unit having a pressure chamber formed at the piezoelectric plate element fillable with an ink, the piezoelectric plate element having electrode layers formed on opposite surfaces thereof surrounding the pressure chamber, the laminated unit also being provided with an orifice in communication with the pressure chamber. The piezoelectric plate element is constituted such that its thickness is reduced upon applying a drive pulse voltage thereto, resulting in a decrease of the pressure chamber volume, whereby an ink-jet drop is ejected from the orifice.

Abstract: The operating speed of an electronic timepiece, whose electro-optical indicator is excited by an oscillator with a frequency harmonically related to its stepping rate, is determined by an electrostatic sensor including a monitoring plate capacitively coupled to an electrode of the indicator. The output of the sensor is a bipolar pulse train developed across a resistor defining a differentiation circuit of small time constant with the condenser formed by the monitoring plate and the electrode, the capacitance of this condenser being on the order of 1 pf or less so that the controlling oscillator is not significantly loaded by the presence of the sensor.