Abstract: An electronic organ includes logic and a memory for detecting and storing a root note signal identifying a chord which has been either automatically or manually generated. Priority logic, coupled with the memory, passes the lowest root note signal to a tone selection matrix which passes a plurality of tone signals representing the note intervals forming the selected chord. A sequential gating circuit receives all of the tone signals and is responsive to an arpeggio circuit, a strum circuit, or a rhythm unit to gate selected tone signals, one at a time, to the voicing circuitry. When one or more of the tone signals are octavely displaced within the selected chord, disinverting gates are enabled to unfold the chord and cause the tone signals to occur in order of ascending frequency.

Abstract: An electric organ utilizes digital encoding and time division multiplexing to transfer both function selection and note selection information from manually operable switches to respective memories, and to simultaneously produce tone signals corresponding to stored note selection information. A single encoding circuit encodes in binary form the function and note selection information during successive scanning periods established by a single multiplexing circuit. A plurality of stored note codes are transferred on a time division multiplexing basis to a note selector which selectively produces all of the selected tone signals, on one output in multiplexed form. The tone signals are demultiplexed to generate a corresponding plurality of tone signal outputs. An octave selection circuit which is responsive to a part of each note code selectively reduces the frequency of the demultiplexed tone signals.

Abstract: An electric organ utilizes digital encoding and time division multiplexing to both transfer function selection and note selection information from manually operable switches to respective memories, and to simultaneously produce a plurality of tone signals corresponding to stored note selection information. A single encoding circuit during successive scanning periods established by a single multiplexing circuit encodes in binary form the function and note selection information. A plurality of stored note codes are transferred on a time division multiplexing basis to a note selector which selectively produces in multiplexed form on one output all of the tone signals. These tone signals are demultiplexed to generate a corresponding plurality of tone signal outputs. An octave selection circuit responsive to a part of each note code selectively reduces the frequency of the demultiplexed tone signals.

Abstract: An electronic organ includes logic and a memory for detecting and storing a root note signal identifying a chord which has been either automatically or manually generated. Priority logic, coupled with the memory, passes the lowest root note signal to a tone selection matrix which passes a plurality of tone signals representing the note intervals forming the selected chord. A sequential gating circuit receives all of the tone signals and is responsive to an arpeggio circuit, a strum circuit, or a rhythm unit to gate selected tone signals, one at a time, to the voicing circuitry. When one or more of the tone signals are octavely displaced within the selected chord, disinverting gates are enabled to unfold the chord and cause the tone signals to occur in order of ascending frequency.

Abstract: In a television receiver, an automatic peaking control circuit is responsive to an automatic gain control signal to lower the peak frequency response of the video amplifier when the received television signal is so weak that much of its high frequency content is noise.

Abstract: In a television receiver, a tuning voltage for a varactor tuner is generated by the actuated stage of a plural step neon lamp memory in which each memory stage corresponds to a different television channel. The memory stages are connected as a ring counter which is stepped sequentially by a two-speed oscillator having a fast scan for undesired channel representing stages, and a slow scan to maintain actuation for a short time period of selected memory stages which correspond to desired channels which are to be viewed. Each memory stage includes a potentiometer with a wiper adjusted to generate the tuning voltage. To preprogram the undesired channel representing stages, the potentiometers in the stages are adjusted to produce maximum voltage, which is detected by a threshold switch to cause the oscillator to rapidly step to the next memory stage.

Abstract: A filter circuit for use in a musical instrument, such as an electronic organ, eliminating undesirable keying transients introduced into the signals provided by tone generators of the organ. The filter circuit includes a bandpass filter filtering from the keyed tone generator signals frequencies which are below and above the desired audio frequency spectrum of the output sound.

Abstract: An electronic organ includes digital circuitry for automatically enabling in a sequential manner a plurality of gates to pass tone signals to a corresponding plurality of keyers. The sequential enabling is separately controllable by an arpeggio circuit, a glissando circuit, and a strum circuit. The digital circuitry includes an octave counter and a tone counter both of which are stepped by a quadrature clock to sequentially enable the gates. The quadrature clock can be stopped to cause a count to be held under control of multivibrators which adjustably control the tone interval and the repeat interval. The repeat multivibrator can be automatically synchronized under control of a key down detector or a rhythm generator.

Abstract: An electrical connector for use in preventing electrical operation of an appliance by its normal power cord when an access panel to the interior of the appliance is removed. The connector includes electrically connectable male and female elements, one of which is mounted in the appliance housing and the other of which is mounted to the closure panel. A guide structure is associated with the connector element mounted in the appliance for guiding the other element into accurately aligned relationship therewith prior to engagement between the elements, thereby providing effectively improved and facilitated electrical connection of the appliance to a power source. The guide structure further cooperates with cooperative securing elements provided for securing the closure panel to the appliance housing to effect automatic alignment therebetween when the connector elements are aligned.

Abstract: An electronic musical synthesizer generates tone signals coupled to a controllable bandpass filter and a controllable low-pass filter. A plurality of voice switches are individually selectable to couple preset control voltages to the filters, and to enable potentiometers which can be adjusted to generate control voltages to vary the frequency characteristics of the filters, control the octave of the tone signals, and to control a modulation oscillator. When a variable/preset switch is set to a preset state, the potentiometers are disconnected and auxiliary sections of the selected voice switch presets voltages for the oscillator, the octave circuit and the filters.

Abstract: In a television receiver, a saturable transformer has three windings, one being in series with a horizontal deflection coil to introduce a parabolic reactance variation to correct for side pincushion distortion. An adjustable correction circuit includes a transistor integrator for producing in another winding of the saturable transformer a vertical parabolic current. The last winding of the saturable transformer is coupled through a pair of switching diodes to a pair of variable inductors. The diodes conduct alternately at the beginning and end of the vertical scanning period. The variable inductors may be mounted coaxially with a common movable core to allow inverse side correction, or may be mounted separately with separate movable cores to allow independent side correction.

Abstract: An electronic organ includes digital circuitry for automatically enabling in a sequential manner a plurality of gates to pass tone control signals to keyers which generate corresponding tone output signals. The digital circuitry includes a tone counter which sequentially enables a plurality of tone gates, and an octave counter which sequentially enables output gates having inputs from the tone gates. A clock generates clock pulses which are rapidly counted by the note counter to sequentially scan the note gates. When a tone control signal is passed, the output of a note detector causes a divider to be inserted between the clock and the note counter to maintain enabling of the note counter.

Abstract: A double touch key for use with musical instruments and the like wherein a key lever is selectively supported on a plurality of pivots and is automatically transferred from one pivot to another as a function of the amount of depression of the key so as to provide a double touch action. A spring may be utilized to control the action of the key in each of the different pivotal modes. A difference in the feel of the key is automatically effected by the transfer of the pivot point.

Abstract: In a television receiver, an automatic phase control includes a phase detector which generates a control signal passed by a bandpass filter to a horizontal oscillator in order to synchronize locally generated horizontal pulses with the received horizontal sync pulses. A keyed AGC circuit in response to increased received signal strength decreases the gain of the RF and IF amplifying stages. When the received signal strength reaches a preselected level, as occurs during off-the-air signal reception, the AGC signal actuates a transistor switch which widens the passband of the filter in order to increase the ability to lock onto irregular sync signals.

Abstract: In a DC power supply, a switching transistor and an inductor are connected in series between an unregulated DC supply and a DC output terminal. The output DC voltage is a function of the on to off ratio of the switching transistor. The switching period of the switching transistor is controlled by a load feedback circuit which compares the output voltage, as sensed by the voltage drop of the current through the switching transistor, with a sawtooth voltage from a synchronized oscillator. An overload detection circuit includes a diode and integrator coupled to a junction between the inductor and the switching transistor. When the switching transistor is turned off, the load current which was flowing through the switching transistor is diverted to the diode. The current through the diode is thus directly proportional to the load current. The load current is detected and causes disabling of the load feedback circuit when the load current rises above a predetermined level.