Abstract: In production of an optomagnetic recording medium having a porous anode oxidized coat on a base plate, a thin film of magnetic material of high saturated magnetization is developed after grinding and etching following formation of the anode oxidized coat in order to increase the effective reflection plane, thereby greatly raising accuracy of detection of the polarization angle at reading-out of signals.

Abstract: In construction of a key musical instrument such as a piano, a swingable element such as a hammer is accompanied with a pneumatic damper having an air vent so that, when impulsive load is applied by motion of the swingable element, fluid viscous resistance caused by flow of air in the pneumatic damper well absorbs shock, thereby greatly suppressing undesirable bound of said swingable element on return to its initial rest position.

Abstract: A display controller displays an image on either of a CRT display unit and a liquid crystal display unit (LCD) having upper and lower screens in accordance with image data stored in a memory. When a CRT display unit is driven, an address generating circuit calculates at the beginning of each horizontal scanning an address of the memory corresponding to the leftmost display position on the current horizontal scanning line in accordance with the vertical position of the horizontal scanning line and the number of display positions on a horizontal scanning line, and stores data representing the address in a first register. The data in the first register is incremented in accordance with the horizontal scanning and fed to the memory to read the image data.

Abstract: A basic tone signal generator and a difference signal generator are provided. A desired tone signal is obtained by synthesizing a basic tone signal and a difference signal generated from these generators respectively. The basic tone signal has principal characteristics of a desired tone signal whose tone color (waveshape) changes subtly with time as in a tone of an acoustic musical instrument, but it is not the desired tone signal itself, including some errors, i.e., difference from the desired tone signal. The difference signal represents the difference between the desired tone signal and the basic tone signal. Since the basic tone signal is constituted by basic tone data whose data amount can be substantially reduced as compared to an amount of data required for reproducing the desired tone signal itself with a high resolution and the difference signal is constituted by difference data whose data amount can be very small.

Abstract: In composition of an Al-base substrate for magnetic recording media, additional inclusion of at least one of specified amount of Cr, Mg and Zn greatly improves recording and reproducing function of the product.

Abstract: A display controller which can display a cursor on either of a CRT display or a liquid crystal type display device is described. The liquid crystal type display device is a type that has an upper and lower display blocks which are scanned substantially in parallel. This display controller allows the display position of the cursor to be designated in the same manner, independent of the type of display device used. The display controller operates in a time sharing manner, alternately on the upper and lower display blocks of the liquid crystal device. Two groups of data corresponding to these upper and lower blocks are formed and are supplied to the liquid crystal display device substantially in parallel. X and Y coordinate positions of the cursor position are also stored. The cursor pattern signal for the liquid crystal display device is also stored in a time shared manner.

Abstract: In this electronic musical instrument a musical tone is generated by repetitively reading out a waveshape stored in a memory. Repetitive sets of phase information are produced, such phase information thus being a linear saw-tooth-like digital signal having a repetition period corresponding to the frequency of the generated musical tone. Phase distorting means modifies the shape of the phase information so as to distort said linear saw-tooth-like signal, without changing the repetition period thereof. The resultant altered phase information is used to access said memory so that during the supply of each of said repetitive sets, successive samples in different portions of said stored waveshape respectively are read out at different effective rates. Thus the waveshape samples read out from said memory will consitiute a musical tone having changed tone color but unchanged pitch.

Abstract: An electronic musical instrument has a musical tone signal forming circuit, an automatic rhythm generator rhythm selection switches, and a registration memory. The switches are used to select one of a plurality of rhythms. The automatic rhythm generator automatically generates a percussion instrument sound corresponding to a selected rhythm. In the registration memory, musical tone data respectively suitable for selectable rhythms are stored in advance. The musical tone signal forming circuit generates a musical tone signal representing a musical tone and further modifies the musical tone signal in accordance with the musical tone data corresponding to the selected rhythm, whereby a musical tone suitable for the selected rhythm can be generated.

Abstract: An electronic musical instrument is provided of the type in which a musical tone signal is formed by executing computations according to a mathematical formula such as a frequency modulation formula. Tone formation of each of musical tone signals to be simultaneously formed is assigned to each time-division-multiplexed time channel which is cyclically repeated over cycles of a plurality of time slots. A computation for forming each single musical tone is divided into a plurality of sub-computations, and those sub-computations are executed respectively using a plurality of cycles of time slots of each single time channel. Thus tone formation according to a complex computation formula is realized. Parameters necessary for the computation are generated respectively for each time slot so that any computational formula is adopted as desired by selecting predetermined parameters for each time slot.

Abstract: A racket includes a head portion having a peripheral notch located therein. A string protector comprised of a connecting section having first and second resilient tongues is situated within the peripheral notch. Each of the tongues has an elongated projection extending therefrom such that the projections oppose each other. The connecting section also has tubular string guides extending therefrom for receiving a racket string. The force of the racket strings tends to push the string protector into the peripheral notch of the head portion, thereby forcing the resilient tongues toward each other so as to close over the strings.

Abstract: A signal selection circuit capable of automatically selecting an input signal in a device having digital and analog input terminals for one and the same audio source device comprises a switch for connecting either the analog input terminal or the digital input terminal to a post stage circuit and a circuit for causing the switch to connect the analog input terminal to the post stage circuit when an analog input signal only has been applied and causing the switch to connect the digital input terminal to the post stage circuit when a digital input signal only has been applied or when an analog input signal and a digital input signal have been applied simultaneously to these terminals. A digital signal which is an input signal of higher quality is automatically selected when an analog signal and a digital signal are applied simultaneously and the listener has only to select a source device so that the operation he is required to perform is simplified.

Abstract: A lid for an electronic musical instrument is disposed to be vertically pivotal about a pivot and covers a keyboard section of a musical instrument body when it is closed. In the lid structure, the pivot is arranged at a position separated forward from the rear end of the lid and downward from the lower surface of the lid by predetermined distances, respectively, and the rear end portion of the lid is housed, when it is opened, in the musical instrument body through an opening formed in the upper surface of the musical instrument body.

Abstract: A method of manufacturing a wire harness with nipped connectors uses a work table having connector holding tools and wiring/nipping tools in a predetermined pattern thereon and a robot with a hand which can be freely moved on the work table. The hand can selectively hold at least a connector holding head for loading connectors in the connector holding tools and a wiring/nipping head for performing wiring between the connectors to prepare a wire harness.

Abstract: In construction of a musical recorder, a sound collector such as a microphone is attached to the body of the recorder at the position of the constant belly of the basic vibration of resonant air columns formed in the bore of the recorder at musical tone generation in order to obtain constant sound collecting level with large howling margin at musical tone regeneration without any influence of the wall configuration of the bore.

Abstract: An actuator for an automatic performance piano, includes electromagnetic plunger units provided in correspondence to and adjacent to a plurality of keys of the piano, each of the electromagnetic plunger units having an excitation coil and a plunger, and a key drive portion, provided at the distal end of the plunger for driving the key. The electromagnetic plunger units are arranged along the key arrangement direction to be deviated from each other in the front-back direction of the key in a staggered manner. A motion stroke of the key drive portion of the electromagnetic plunger unit in one row is made smaller than a motion stroke of the key drive portion of the electromagnetic plunger unit in the other row.

Abstract: A CMOS integrated circuit for signal delay comprises CMOS gate circuits connected in multiple stages which deliver out an input binary signal after delaying it by a predetermined delay time. The CMOS gate circuits are arranged in a folded pattern on an integrated circuit substrate and each row of the folded pattern including a part of the CMOS gate circuits in stages of an odd number. Each of the CMOS gate circuits consists of an N channel element and a P channel element cascade-connected to each other and gate patterns of the respective channels have their width and length adjusted in such a manner that value of operating currents in these elements become equal to each other when the same external voltage has been applied to these elements.

Abstract: In production of a composite type iron golf club head having a FRP (fiber reinforced plastic) backing in a rear recess, a peripheral flange to be caught by the main body is formed on the FRP backing by providing a bottom peripheral groove in the rear recess for fortified bonding of the FRP backing to the main body.

Abstract: In a disc playback device of a type in which a disc or a disc cartridge case housing a disc is loaded in a holder and the disc is played back upon moving of this holder from a disc loading position to a disc playback position, magnetic attraction generating means is provided for attracting the holder and a chassis carrying a turntable to each other. The magnetic attraction generating means may be constructed by securing a magnet to either the chassis or the holder and forming the other with magnetic substance, or may be constructed by securing magnets to both the chassis and the holder. The holder is securely clamped in position when it has been moved to the disc playback position and anti-vibration characteristics of the holder are thereby improved.

Abstract: An envelope generator is provided with a count circuit the count value of which is varied through addition or subtraction or combination thereof, and a conversion circuit which operates to convert the count value into amplitude data, so as to generate an envelope having a shape corresponding to variations with time of the count value. According to one aspect of the invention, the count circuit is a circuit which carries out computation for exponentially varying the count value through polygonal line approximation, so as to form an envelope of exponential characteristic. According to another aspect of the invention, the conversion circuit is a memory which has stored amplitude data corresponding to count values in advance so as to convert count values in the last linear region of the envelope obtained by the polygonal line approximation into amplitude data in exponential relation and to convert count values contained in the remaining polygonal line regions into amplitude data in linear relation.