Abstract: The embodiment of the invention disclosed herein is directed to an electronic keyboard musical instrument wherein all the audio frequency signal information is derived from an oscillator multi-frequency generator and frequency divider circuits formed by large scale integrated circuits. The divider circuits associated with various keys of the keyboard generate tone signal information for each of the particular notes of the various octaves. The integrated circuit unit has a plurality of frequency input terminals arranged for connection to the multi-frequency generator and a plurality of second input terminals arranged for connection to its associated key switch on the keyboard of the musical instrument. Actuation of the key switch on the keyboard will enable gate circuits to transfer output signal information from the associated divider into the audio-amplifier stages of the electronic musical instrument.

Abstract: The embodiment of the invention disclosed herein is directed to an electronic musical instrument of the keyboard type wherein the audio frequency signal information is derived from a multi-frequency generator formed by an electronic oscillator and a plurality of divider circuits, and wherein programmable divider circuits are associated with the various keys of the keyboard to generate associated tone signal information. The programmable divider circuits are formed on a large scale integrated circuit chip and enable alteration of the numerical divisor so that different tone signals can be obtained from the same electronic circuitry thereby enabling the same type of LSI chip to be used for many different circuit configurations. The LSI chip also provides a scanning circuit that scans an X--Y matrix switching arrangement to determine which one of a plurality of key switches is closed.

Abstract: A two-speed automatic phonograph has a self-resetting, record-centering pilot to receive records having different size apertures therein. The records of different size apertures are to be operated at different playing speeds for reproduction of the sound tracks thereon. The speed at which the record is turned, i.e. 331/3 rpm or 45 rpm, is automatically controlled by sensing a characteristic of the record to be played. This will vary the frequency of a signal source which controls the speed of rotation of a synchronous motor which drives the record turntable at the proper playing speed. Also, the motor drive circuit includes means for applying a high voltage to the motor during startup thereof and for reducing the voltage applied to the motor during normal running while a record is being played.

Abstract: The embodiment of the invention disclosed herein is directed to a record selector mechanism which includes a plurality of spaced-apart records to be individually selected and played by a transducer. The plurality of spaced-apart records are secured by coupling means to a common support shaft element and simultaneously rotated at playing speed. A transducer member is secured to a transport mechanism to be positioned adjacent the record to be played. The transport mechanism includes means for urging the transducer in either one of two directions so as to engage a selected one of diametrically opposed record surfaces which are rotating. A slide pointer is mounted at the exterior of the housing and movable along a linear path and adjacent spaced-apart indicia. The indicia identifies the records within the phonograph system and the pointer is used to select the desired record. The slide mechanism includes an actuator to be manipulated when the slide is adjacent indicia corresponding to the desired record.

Abstract: The embodiment of the invention disclosed herein is directed to a record selector mechanism which includes a plurality of spaced-apart records to be individually selected from their storage position and transported to a playing position. The record selector mechanism has an arcuately movable playing station which scans the plurality of positions occupied by the records located in a storage position. The system also includes means for removing the record from the storage position and inserting it into rotating means for playing the record while the playing station remains in registry with the storage position. The rotating means includes diametrically opposed friction surfaces which are slightly angled relative to one another and include means to effect self-centering of the record.

Abstract: A molded plastic mounting base is provided for stop tablets on an organ or the like. Pivot shoulders are integrally molded on the mounting plate. Each stop tablet has complementary pivot recesses integrally molded therein. A single blade-type spring snapped on to depending structure on each stop tablet simultaneously operates as a retaining means for a respective stop tablet and as an overcenter biasing spring therefor.

Abstract: A coin switch for coin operated vending machines, especially juke boxes, in which a coin, after it has been successfully passed by a slug rejector, drops through a chute according to its denomination and interrupts a light beam falling on a photo-sensitive device, specifically a photo transistor. Different chutes or passageways are provided for coins of different denomination, and the chutes are so configured as to limit the speed of passage of a coin whereby to insure production of a modulated signal of recognized character of usable width. Such signal is conveniently a D.C. pulse.

Abstract: A chord button assembly for use in electronical organs is formed as a unitary assembly. A plastic hinge strip extending the length of the chord selector button area is provided and a plurality of keys or arms extend from the strip and have selector buttons formed at or near terminating ends of the arms in a staggered pattern to extend through openings formed in the chord selector plate. The arms are provided with return spring and electrical contact element receiving recesses which are strategically located to allow selection of multiple chord operation by actuation of a single chord button.

Abstract: Disclosed is an electronic piano circuit arrangement which combines a multitude of different frequencies within a resistordiode matrix array. The resistor-diode coupling elements provide a different value impedance for various signals to be combined and the amplitude of the signals are predetermined to electronically produce a piano sound which substantially corresponds to the sound of an actual piano tone.

Abstract: The embodiment of the invention disclosed herein is directed to an electronic musical instrument of the keyboard type used to electronically reproduce piano sounds. The circuit has means to vary the amplitude of the piano voice in response to the velocity of the downward movement of the key. Means are provided for producing a fundamental square wave frequency and the second and fourth harmonics thereof, in response to the actuation of a given key on the keyboard. One circuit arrangement includes means for combining the fundamental frequency and the second and fourth harmonics in a predetermined time relation to produce the zero, attack, peak, and decay characteristics of a piano voice as actually produced by a piano string.

Abstract: Apparatus and a method for controlling the operation of mechanical or other equipment having a plurality of information storage members arranged in preselected positions in an array and an actuatable information retrieval mechanism movable relative to the array wherein selective access to the information of any one of such storage members can be achieved by generating output signal groups representing, respectively, the position of a selected storage member and its number in the array, whereby simplified counting techniques can be used to store such number and thereafter use it for positioning said retrieval mechanism adjacent to the selected member itself for effecting the readout of the information on the member. The unit uses solid state electronic elements to minimize cost and to provide for optimum reliability.