Abstract: In a chopper keyer electronic organ system, a sampling network samples the drawbar inputs to the chopper keyers in order to provide a separate channel of percussion. The drawbar lines for one or more of the footages are sampled and the sample signal is amplified and shaped to provide touch envelope percussion in addition to the sounding of the chopper keyer outputs. Alternatively, the chopper keyer outputs may be disabled and separate voicing such as for piano, harpsichord or steady tones provided via the drawbar sampling circuitry.

Abstract: A key assignor comprising a scanning means, a first clock memory, a second memory for releasing a switch information, a comparator, a priority circuit device, a means for inhibiting the write-in operation, and a means for extracting key codes. Key switches are divided into blocks to scan the latter without scanning all of key switches. Scanning time can considerably be reduced as compared to prior arts, thereby enhancing response greatly.

Abstract: A key code generator for electronic musical instruments which has a switch matrix circuit having a plurality of switches disposed at the intersections of two sets of buses, means for simultaneously applying signals to the switch matrix circuit from one of the two sets of buses to derive outputs from a plurality of blocks into which the buses of the other set are divided line by line, a memory for detecting the blocks that even one switch is in the on state from the bus outputs of the switch matrix circuit and temporarily storing signals of the detected blocks, a first priority selector for selecting block signals in a predetermined order of priority from the bus outputs and sequentially outputting the block signals with a predetermined clock pulse, means for inhibiting the block detecting operation during outputting from the first priority selector and applying the selected block signals to the buses of the detected blocks to sequentially scan only the detected blocks, a second priority selector for selecting

Abstract: An electronic musical instrument of a waveshape memory type comprising: a plurality of waveshape memories for storing waveshapes of different tone color, and means for variably mixing the outputs of the plurality of waveshape memories for generating tone signals of varying tone color. The mixing ratio of the different waveshapes may be varied with the lapse of time or according to the touch of the key operation or to the tone pitch.

Abstract: A LSI (large scale integrated circuit) device is disclosed which generates 12 output frequencies related to each other by a multiple of the twelfth root of two from a common time base without the use of parallel divider or shift register strings. The output frequencies comprise the top octave, or a multiple thereof, of the frequencies of an electronic musical instrument. A binary counter serves as a common time base and encodes each wave form period in a form of a binary code. A binary processing circuit associated with each output frequency stores the count position of the next desired wave form transition and updates the stored code after each transition has occurred. The binary processing circuitry comprises a latch circuit, a binary full adder or ROM (read only memory), a digital comparator or ROM, and a J-K flip-flop circuit. The outputs can be easily modified in both actual frequency and waveform symmetry.

Abstract: A fully digitalized function-of-time generator suitable for use as a tone envelope generator in a digital electronic musical instrument, comprising: a clock pulse generator for generating a clock pulse at a selectable rate; a gate enabled at each arrival of the clock pulse; a single-stage binary shift register for successively shifting out its contents as a digital word representing the instantaneous values of a desired function of time synchronously with the clock pulse; a digital subtractor; a digital multiplier; and a digital adder, all of these members being interconnected to each other to be operative so that the output of the register is subtracted from a first set value representing a digital word, the resulting difference being multiplied by a second set value representing a digital word, the resulting product being added to the output of the register via the gate, so that the resulting sum is loaded into the register.

Abstract: An envelope generator for an electronic organ, especially for developing percussion sounds, in which each of at least some of the organ cases having keyers pertaining thereto are provided with envelope control circuits interposed between the keys and the respective keyers. Each envelope control circuit includes voltage supply means connected to the keyer and a control circuit therefor which is actuated by depression of the key. The control circuit provides for continuous actuation of the keyer by voltage from the voltage supply means while the key is depressed or for a momentary supply of keyer actuating voltage from the voltage supply means to the keyer followed immediately by a decay of the keyer actuating voltage at a predetermined rate and which rate can be selectively varied.

Abstract: Spatially separated high frequency tonal effects from an electronic musical instrument having less tone generators than keys selectable. A high frequency speaker system is provided in addition to the normal audio system. The audio signals produced by the tone generator are applied to a high pass filter-amplifier circuit before application to a tweeter switch. Digital logic is provided to demultiplex the note generator capture signal for note generator assignment information. The demultiplexer information is applied to the tweeter switches to effect the activation of a tweeter switch and permit the sounding of the tweeter speaker. Thus it may be seen that the present invention permits the separate soundings of the high frequency range in a directional fashion, creating the movement of sound sources and changing spatial relationships in response to key activity.

Abstract: This vacuum-type circuit interrupter is a high current interrupter rated for interrupting currents of 35,000 amperes r.m.s. or higher. Despite this high current interrupting requirement, each of its disc-shaped contacts can be made from an exceptionally small and thin blank because these contacts are of beryllium and each has a flat surface, without the usual central recess, extending from its center to a perimeter located radially between the outer periphery of the contact and the outer periphery of the inner end of the associated contact rod. On this flat surface of beryllium, contact-engagement occurs and arcs are initiated during interruption. Each contact rod is joined to its associated beryllium contact by means of brazed joint, a portion of which is accommodated in a very shallow recess on the back surface of the contact.

Abstract: A control arrangement is described for dynamically braking a vehicle driven by an electric motor having a single field winding. The control arrangement comprises means for controlling the supply of power to the motor, a permanent magnet generator for mechanically coupling to the motor, and circuit closure means arranged to complete a circuit between the output of the generator and the field winding to dynamically brake the motor when the motor is de-energized by the controlling means.

Abstract: An electronic musical instrument comprises a waveshape memory delivering out digital value samples of one cycle of a certain waveshape, and a loop circuit including a filter and a shift register. The digital waveshape values read out from the waveshape memory is caused to circulate at a predetermined rate of time in the loop circuit. A waveshape taken out from the loop circuit varies as time lapses, and is utilized as a musical tone.

Abstract: A rocking motor for driving an indexing element in a quartz controlled analog wristwatch is impulsed once per minute. The indexing element and the indexed "center" wheel are carried between parallel shunt plates holding the permanent magnet. The driving element is deflected by a pulse from its rest position to tension a spring, and the minute wheel is indexed when the driving element is returned by the reset spring.

Abstract: An electronic digital watch including a device for enabling the correction of the minutes and seconds display. The device includes a delay circuit which only enables a correction to be effected if the push-button for correcting the display is actuated for a predetermined time, and means for resetting the seconds display to zero and, if the watch is slow, advancing the minutes display by one.

Abstract: A pedal tone generator for an electronic musical instrument, such as an electronic organ, having the capability of automatically producing bass rhythm patterns based on a tonic note, includes a memory for storing a plurality of rhythm patterns which has a plurality of outputs for producing a predetermined pattern sequence for each of the notes of the diatonic musical scale, and a circuit for producing signals indicative of which of the pedal keys, usually thirteen, is operated by the instrumentalist. The pedal key signals are binary encoded to produce a plurality of code words each unique to the tone of one of the keys, and each of the outputs from the memory is also binary encoded to be uniquely represented by one of a corresponding number of code words. Code words representing a depressed key and the note instantaneouly being "played" by the memory are added to produce a coded digital signal representative of the sum in the duodecimal system of counting.

Abstract: Upon key depression, there is produced a phase progress signal in digital representation which varies by an increment predetermined in accordance with the frequency of the note designated by the depressed key. The phase progress signal is subjected to a coordinate conversion and squaring operation to provide downward opening parabolic curves and upwardly opening parabolic curves, which are alternately connected at their open ends to produce an approximate sinusoidal waveform as a digital tone signal. The digital tone signal is multiplied by a digital envelope signal to produce a keyed musical tone signal.

Abstract: A timepiece gear train structure comprises a center wheel and pinion mounted between a third wheel bridge and a date wheel holder without use of a train wheel bridge as is customarily used in such gear train structures. A plate extends between the third wheel bridge and the date wheel holder and has an opening therein through which extends the intermediate part of the center wheel and pinion thereby rotably supporting the intermediate part thereof. The lower part of the center wheel and pinion is rotatably supported by the date wheel holder by means of a cannon pinion which encircles the lower part, an hour wheel which encircles the cannon pinion and a bush encircling a portion of the hour wheel and being fixed to the date wheel holder.

Abstract: Disclosed is an alarm timepiece having a manual switch adapted to be operated to different settings, each of the settings corresponding to one of a plurality of modes of control functions of alarm. Means are provided to detect to which mode a given setting operation of the switch corresponds and thereby to control the generation of an alarm sound. The different alarm modes include a normal alarm mode, a recurring temporal suspension of the alarm function, selective actuation of the alarm at any selected time, and termination of the alarm function.

Abstract: An electronic watch wherein pulses from a high-frequency standard are converted by a frequency divider into low-frequency timing pulses which are supplied to a stepping motor to advance the hands of the time display. In order to automatically effect a rapid correction of the seconds hand display when it deviates from precise time, a system is provided that includes an actuating element accessible to the user of the watch and operatively coupled to a switch connected through a reset line to several of the last stages of the frequency divider to effect a reset thereof upon activation of the switch. Also reset when the switch is activated is a reference counter supplied with pulses by the frequency divider. The divider feeds pulses by way of a logic circuit to the stepping motor and to a synchronous counter which is maintained in synchronism with the time display.

Abstract: A timer in which a lesser cylinder having funnel-shaped top and bottom portions is disposed within a greater cylinder. Granular material is disposed in the greater cylinder, with a passage or gap provided between the outside diameter of the lesser cylinder and the inside diameter of the greater cylinder so that granular material funneled through the lesser cylinder downwardly to the base of the greater cylinder may be quickly returned at any time by inverting the greater cylinder, thereby allowing another pass of the granular material through the lesser cylinder.

Abstract: An electronic timepiece calendar circuit whereby the display of at least the date is automatically effected during both leap years and non-leap years is provided. The electronic timepiece calendar circuitry includes a date counter that is indexed by a count of one from a count of one to at least 31 and thereafter is returned to a count of one to begin counting the dates of the next month. A month counter is provided for being indexed by one through a count of one to at least 12 each time the date counter is returned to a count of one and further is adapted to produce a signal representative of the count thereof. A control circuit is provided for receiving the month signal produced by the month counter and in response thereto returns the count of the day counter to one when the count of the month counter is two and the date counter is changed from 28 to 29 or from 30 to 31 depending on whether a leap year signal is applied thereto.