Abstract: A key signal is supplied through an I/O port to a chord discriminating section of one electronic musical instrument, which generates corresponding accompaniment tone data. The accompaniment tone data is transferred through the I/O port to a tone signal generator of a different electronic musical instrument without auto-play accompaniment function, whereby accompaniment tone is generated from the different electronic musical instrument.

Abstract: A gear train mechanism stop device is used in a timepiece having clock signal producing IC, a stepping motor for generating a given rotational movement in response to a clock signal produced from the IC, at least hour and minute hands, and a gear train mechanism for transmitting the rotational movement from the motor to hands so as to make the hands move in a given movement, which is selectively engaged with a specified gear in the gear train mechanism so as to stop rotation of the specified gear.

Abstract: A data processing device such as an electronic cash register includes a keyboard having keys adapted to generate corresponding key codes, and at least one arrangement key for performing a series of operations corresponding to operations which may be performed by operating a plurality of the other keys. Key codes corresponding to the various keys are stored in a memory. A CPU performs arithmetic operations according to the key codes stored in the memory. When a key code corresponding to the arrangement key is entered, the CPU sequentially reads out a plurality of corresponding key codes from the memory and performs a series of operations corresponding to these key codes.

Abstract: An obstacle sensing area ahead of a mobile robot is divided into a plurality of sensing regions. A number of ultrasonic transmitters and plural receivers on the robot cooperate to detect the presence of obstacles in the sensing regions. Coordinates representing four corners of each sensing region, and time data representing a time period from emission of ultrasonic waves from selected transmitters to reception of the waves by each receiver when the waves are reflected by an obstacle at each corner point, are prestored in data ROMs. The data ROMs are retrieved by a CPU in response to obtained time data, and precise position data of the obstacle in the sensing area is determined.

Abstract: Two-color image forming apparatus has a bipolar photosensitive body, a first charging means, a first electrostatic latent image forming means, a first developing means, a second charging means, a second electrostatic latent image forming means, and a second developing means. The second charging means is a corona discharger having a corona ion stream control screen forming by laminating a conductive member with an insulating member and disposed at or near an open portion for radiating a corona ion.

Abstract: An electronic musical instrument comprising detection means to detect time positions of an initial part and a terminal part of a voice, extraction means to extract pitch data of the voice, a plurality of processing means to subject the pitch data to different processing operations, means to successively select the processed pitch data of the plurality of processing means in correspondence with the respective detected time positions, and musical sound production means to produce a musical sound on the basis of the processed pitch data delivered from the selection means.

Abstract: An output voltage of a solar cell is supplied to a voltage converter. The voltage converter converts the input voltage into a predetermined voltage, and supplies it to a capacitor. The capacitor is charged by the output current of the voltage converter. The capacitor has a relatively large capacitance. A second voltage converter converts an input voltage from the capacitor into a voltage which is lower than the charged voltage of the capacitor and higher than a minimum operating voltage of a load. The load performs a predetermined operation using the output voltage of the second voltage converter.

Abstract: An automatic performance apparatus includes input circuitry for serially inputting musical sound information of a predetermined melody and musical sound information to be imparted to the melody, in accordance with progressions of the melody and a chord. A storage device serially stores the musical sound information inputted, and readout circuitry successively reads out the musical sound information stored in the storage device. Accordingly, the musical sounds based on the read out musical sound information are reproduced, and a melody and a chord are played simultaneously.

Abstract: Melody data stored in a memory is sequentially read out and sounded with the operation of a one-key switch. In the memory is also stored accompaniment data, which is automatically played under the control of a microprocessor. The timing of the operation of the switch for the melody is compared to the normal timing of the piece. If the difference between the two compared timings is less than .DELTA.t, the accompaniment is automatically played at a normal timing. If it is greater than .DELTA.t, the tempo of the accompaniment is corrected.

Abstract: A touch response apparatus for an electronic musical instrument wherein a nonlinear analog-to-digital conversion is effected using a single A/D converter in correspondence with a plurality of keys, and wherein touch data are proportional to the period of time and amplitude value of an envelope waveform.

Abstract: A photocopying apparatus is provided in which a moving area of a lens at the time of a magnification changing and that of an optical device such as a mirror unit overlap partly. At the time of the magnification changing, it is determined whether the optical device is positioned at a home position. When the optical device is not located at the home position, the lens is caused to move for the purpose of the magnification changing after the optical device is returned to the home position.

Abstract: In an optical tracking robot system, a target has a light emitting section with a high light emitting directivity, for emitting a light beam modulated into pulses. A tracking robot has a tracking sensor section for monitoring a light beam by a pair of light receiving elements, for processing signals from the received light beam, and for generating and supplying drive control signals to a travel control section. In response to drive control signals the travel control section generates and supplies drive signals to a driver section. The driver section drives the tracking robot so that the robot advances while turning to the right when the output level of the right side light receiving element is higher than that of the left side light receiving element, and to the left when the latter is higher than the former. The robot also has an approach sensor section which detects the light beam by means of a light receiving element, and generates and supplies stop control signals to the travel control section.

Abstract: When a desired rhythm is selected by a rhythm key group, corresponding rhythm data is set in a rhythm register in a CPU. Meanwhile, accompaniment pattern data is set in bass, backing and arpeggio registers by operation of corresponding bass, backing and arpeggio switches. The data set in the registers are supplied as address data to an arpeggio memory section, a backing memory section and a base memory section, so that corresponding rhythm data, tone color data and accompaniment data are read out.

Abstract: The present invention provides a magnification control device for use to a copying machine in which the area magnification as well as the linear magnification can be set by the operator. The linear magnification can be converted to the area magnification and also, the area magnification can be converted to the linear magnification. The area magnification is determined based on the area of the copying paper and that of the original.

Abstract: Data for a plurality of musical pieces is preset in a ROM pack and also on a tape recorder. Musical piece data read out from the ROM pack or tape recorder is supplied from a control section to melody generators, a chord generator, a bass generator and a rhythm generator. Melody data, chord data, and rhythm data obtained from these generators are coupled through an amplifier to a loudspeaker.

Abstract: The addresses of memory positions in a RAM stored with a series of tone data corresponding to a preselected musical piece, are sequentially stepped by a backward key or a forward key in the backward or forward direction, and the tone corresponding to the tone data stored in a stepped address is generated, for each actuation of the corresponding key, under the control of CPU. Upon actuation of a delete key, the tone corresponding to the tone data stored in an address preceding the currently stepped address by one, is generated through the controlling operation of the CPU. Subsequently, the tone data stored in an address succeeding by one the current address is written into that address, and the tone data of the addresses succeeding the address having its content written are sequentially shifted by one address in the backward direction, respectively.

Abstract: When, in a two-color image forming apparatus, a first visible image is formed on a photosensitive drum, and sequentially a second visible image is formed on the drum on which the first visible image remains, said second visible image being different in color from said second visible image, a cylindrical non-magnetic sleeve rotates in a direction opposite to a rotation of a permanent magnet equipped with the sleeve, thereby enabling a developer to be conveyed in a direction opposite to a rotation of the permanent magnet.

Abstract: An input device for an electronic musical instrument, has blown air apertures and suction air apertures alternately disposed on the front face of its main body. This input device also has elastic members provided within the blown air apertures and suction air apertures, in such a way as to be deformed by the force of the air caused to flow through said blown air apertures and suction air apertures. The input device also has magnets or pressure members serving as operation members, which magnets or pressure members are each displaced by an elastic member, and a plurality of musical tone input switches are driven by the displacement of the magnets or pressure members.

Abstract: In a video game apparatus, a first joystick and a second joystick each contain a stick, a game start key and a mode select key. A control circuit controls the video game apparatus in the following manner. In a one-player mode as selected, only the output signal from the joystick whose start key is operated, is supplied to the main frame of the video game apparatus. In a two-player mode as selected, the output signal from the joystick whose start key is operated is supplied to the main frame. In turn, a game is started. With the progression of the game, the output signals from the first and second joysticks are alternately applied to the main frame.

Abstract: Two electronic musical instruments are supported in combination on a stand. The electronic musical instruments have respective switch sections each for setting a plurality of different timbres which are different from those which can be set by the other. When transfer mode switches of both the instruments are "on", timbre data set in one electronic musical instrument is transferred to the other electronic musical instrument through a cable, so that tones with the same timbre are sounded from loudspeakers connected to the respective instruments.