Abstract: An ink jet head includes a pressure chamber, a vibration plate, and a piezoelectric element which is provided on the vibration plate and causes a volume displacement of the pressure chamber. The piezoelectric element has a thickness of 20 &mgr;m or less, and the pressure chamber and the piezoelectric element satisfy a relation V0/(L22b)>550×10−6, where V0 [m3] denotes a volume displacement of the pressure chamber when the piezoelectric element is driven, L2 [m] denotes a width of the piezoelectric element, and b [m] denotes a depth of the pressure chamber.

Abstract: The present invention relates to an ink jet recording head and a production method therefor, wherein ink is spouted by vibrating a vibrating plate that is a wall part of a pressure chamber, using an ink jet energy generating part. In the ink jet recording head that comprises a main body formed by a plurality of pressure chambers (ink chambers) provided corresponding to nozzles that spout ink, the vibrating plate that constitutes a wall of the compression chamber being provided to the main body and an energy generating part provided on the vibrating plate at a position corresponding to a forming position of the pressure chamber, which makes the ink inside the pressure chambers spouted from the nozzles by deformative-energizing the vibrating plate, the vibrating plate and the ink jet energy generating part are formed using the thin film forming technology.

Abstract: A rhythmic tone generator includes a casing that houses a rhythm signal generating circuit, a battery and a tone generating device, and that is positioned and held on the concha by an attaching device, so that the rhythmic tone generator is attached to the ear without being inserted into the ear hole, and operates to generate rhythmic tones right in the vicinity of the ear hole. On the rear surface of the casing are disposed a display device connected to the rhythmic tone generating circuit and operable to display a parameter representing the speed of the rhythm signal, and a push-button switch that may be operated with a hand while the tone generator is being attached to the ear.

Abstract: A timer alarm device is supported on an ear as an earring by pinching an earlobe of the ear with an arm and a clip. Spring force to pinch the earlobe is produced by permitting a spring provided on the clip to run on a corner of a flat part. A timer circuit, a piezoelectric buzzer, and a battery cell, etc., are accomodated on a head part provided on the upper part of the arm. Since the piezoelectric buzzer for outputting an alarm sound is located in the vicinity of an earhole, a user can hear a greater sound even with a smaller sound volume and hence attention of the user can be securely called. Since functions and component parts are limited to eliminate the need of setting and confirmation that rely upon eyes, even a visually handicapped user can conveniently use the device.

Abstract: A shutter apparatus is provided wherein openings for defining a secondary aperture are formed in respective shutter blades, such that an amount of light transmitted through the secondary aperture is detected, and the drive force for driving the shutter blades is changed so that the amount of the received amount increases in the opening stroke according to a predetermined function. When the integrated quantity of the received light reaches a threshold value, the movement of the shutter blades is reversed, and the shutter speed is determined based on the integrated light quantity obtained upon completion of shifting to the closing stroke. Thus, variations in the exposure amount that occur upon reversal of the shutter blades are canceled in the closing stroke.

Abstract: In a camera battery charger, a solar battery is provided upon a lid of a camera case, and a charging circuit for charging the in-camera battery by the solar battery or an external battery. When a camera is stored in a main body of the case, the in-camera battery is electrically connected to a power supply output terminal of the charging circuit, and is normally charged by the solar battery. When high-speed charging is necessary, the in-camera battery is charged at high speed by an external battery in an external battery adapter set in the main body of the case, or an external battery stored in an external battery storage part integrated with the main body of the case.

Abstract: A charging method of and a charging apparatus for charging a nonaqueous electrolytic battery such as a lithium primary battery including a positive pole active material, negative pole active material of a lightweight metal and nonaqueous electrolyte. The charging is carried out at a predetermined electric current per time of 2 .mu.C-5 mC only when the residue capacity of the nonaqueous electrolytic battery is in a range of 5-95%.

Abstract: A sound multiplex signal encoder circuit comprises a frequency modulator for modulating a sub-carrier wave, having a frequency twice as high as the frequency of a horizontal synchronizing signal of a video signal, with a sub-channel source sound signal. An automatic frequency control circuit generates a reference signal in accordance with the horizontal synchronizing signal of the video signal. A phase synchronizing circuit controls the frequency and the phase of the sub-carrier wave by supplying, to the frequency modulator, an error signal representing a phase difference between the sub-channel signal generated by the frequency modulator and the reference signal generated by the automatic frequency control circuit. A video signal detecting circuit detects whether a video signal is present, and stops the operation of the automatic frequency control circuit by means of a switch when no video signals are present.

Abstract: Picture frames on a color photographic film are detected with a television camera, and the color images of the picture frames are displayed in a matrix arrangement on a color monitor. In order to display color images of picture frames at the same dimension on the color display irrespective of the picture frame size of the color photographic film, a specific area from which pixels are picked up is determined in accordance with the picture frame size, and pixel thinning is performed. Pixels for an image taken as a full size on the 135 type color photographic film are thinned by removing every second pixel in both the vertical and horizontal directions, and pixels for an image taken as a half size on the 135 type color photographic film are thinned by removing every second pixel in the vertical direction within the specific area, and interchanging the vertical and horizontal addresses to read the image data rotated by 90 degrees.

Abstract: An electrochemical single battery such as fuel cells, and so forth, having an increased reaction area to augment its output density, which comprises a pair of electrode parts which are mutually opposed to be the electrodes when the electrochemical reaction is effected; reaction layers to carry out the electrochemical reaction, which are positioned between these two electrode parts, each being protruded alternately in one and the same direction from one electrode part toward the other electrode part in confrontation thereto, and being a slant with respect to said electrode parts; and an electrolyte layer interposed between these confronted reaction layers and holding therein an electrolyte which transmits ions to be produced at the time of the electrochemical reaction.

Abstract: A phase lock recovery apparatus for a phase locked loop circuit having a voltage controlled oscillator. The apparatus includes a detection circuit coupled to the phase locked loop circuit for detecting a phase unlocked state occurred in the phase locked loop circuit and a sweep signal generator responsive to the detection circuit for sweeping the frequency of the voltage controlled oscillator to come within the lock range of the frequency of the input signal when the phase unlocked state is detected.

Abstract: A color film analyzing method and apparatus which displays image data of frames of the film as positive images provided by a TV camera, and a plurality of reference images previously provided and stored in a recording member, in a matrix pattern on an image display device. When one of the color images of the picture frames is specified, the image line of the matrix including the specified image is shifted so that the specified image is adjacent to the reference image line on the image display device and a cursor image is displayed overlapping a portion of the specified image. The cursor image is provided as a reversed image of the part of the specified image where the specified image is overlapped by the cursor image. If the reversed image has a color identical or similar to the portion of the specified image surrounding the cursor image, the cursor image is colored differently.

Abstract: A calcined member for arc-extinguishing chambers which are installed in electromagnetic contactors and magnetic circuit breakers for high-voltage applications. The calcined member consists of an inorganic composite material obtained by molding and heat-treating a starting material under pressurized condition, the starting material comprising 10 to 50% by weight of a mica powder as a base material, 10 to 50% by weight of a magnesium oxide as a charging material, and 25 to 60% by weight of a mixture powder of boric acid, boric anhydride and zinc oxide as a binder.

Abstract: An arc resistant insulator composed of a composite composition comprising an insulating base material and a zinc borate hydrate. The insulating base material is composed of aluminum oxide and/or aluminum hydroxide and mica power. The zinc borate hydrate is composed essentially of 2ZnO.3B.sub.2 O.sub.3.3H.sub.2 O. The arc resistant insulator is prepared by mixing the insulating base material with a zinc borate hydrate forming material composed of normal boric acid, boric acid anhydride and zinc oxide and heating and compacting the mixture thus obtained in a closed system at a temperature of at least 155.degree. C. under pressure of at least 50 kg/cm.sup.2.