Abstract: A stator for a stator-wound electrical motor, with a stator ring with an inside diameter (ID), and a series of spaced, inwardly-directed stator teeth with slots between adjacent teeth. The teeth and slots are arranged around the ID of the stator ring. At least some of the slots are inwardly tapered. There are a number of electrical coils that are partially located in the slots, where at least some of the coils surround a single tooth and occupy some of the space of both slots that border the single tooth such that in at least some of the slots there are portions of two adjacent coils. These two adjacent coils are constructed and arranged such that in order to insert both such adjacent coils on their teeth without altering either coil, one particular coil of the two adjacent coils must be inserted before the other coil.

Abstract: A waveguide system for radiating sound waves. The system includes a low loss waveguide for transmitting sound waves, having walls are tapered so that said cross-sectional area of the exit end is less than the cross-sectional area of the inlet end. In a second aspect of the invention, a waveguide for radiating sound waves, has segments of length approximately equal to A ? ( y ) = A inlet ? [ 1 - 2 ? Y B + ( y B ) 2 ] where l is the effective length of said waveguide and n is a positive integer. The product of a first set of alternating segments is greater than the product of a second set of alternating segments, in one embodiment, by a factor of three. In a third aspect of the invention, the first two aspects are combined.

Abstract: A waveguide system for radiating sound waves. The system includes a low loss waveguide for transmitting sound waves, having walls are tapered so that said cross-sectional area of the exit end is less than the cross-sectional area of the inlet end. In a second aspect of the invention, a waveguide for radiating sound waves, has segments of length approximately equal to A ? ( y ) = A inlet ? [ 1 - 2 ? Y B + ( y B ) 2 ] where l is the effective length of said waveguide and n is a positive integer. The product of a first set of alternating segments is greater than the product of a second set of alternating segments, in one embodiment, by a factor of three. In a third aspect of the invention, the first two aspects are combined.

Abstract: An electrical transformer having a core with two core portions having a shield for electrically shielding one core portion from the other core portion.

Abstract: Combining audio channel signals includes shifting the phase of a first audio signal relative to a second audio signal. In one embodiment, the relative phase shifting is substantially limited to a predetermined frequency range.

Abstract: A receiver local oscillator is always tuned to a frequency that lies within a range of reception frequencies of the receiver. The oscillator is tuned to a frequency less than and above the received frequency when the received frequency is above and below a threshold frequency, respectively.

Abstract: A waveguide system for radiating sound waves. The system includes a low loss waveguide for transmitting sound waves, having walls are tapered so that said crosssectional area of the exit end is less than the cross-sectional area of the inlet end. In a second aspect of the invention, a waveguide for radiating sound waves, has segments of length approximately equal to A ⁡ ( y ) = A inlet ⁡ [ 1 - 2 ⁢ Y B + ( Y B ) 2 ] where l is the effective length of said waveguide and n is a positive integer.

Abstract: An electrical transformer having a core with two core portions having a shield for electrically shielding one core portion from the other core portion.

Abstract: Combining audio channel signals includes shifting the phase of a first audio signal relative to a second audio signal. In one embodiment, the relative phase shifting is substantially limited to a predetermined frequency range.

Abstract: A video input signal is applied to a delay circuit having a plurality of taps which are coupled to maximum and minimum value selection circuits. In the absence of a video signal transient, the center tap of the delay circuit is coupled to an output terminal via an output switch. When a "white going" transient occurs, the output switch sequentially selects the outputs of the minimum and maximum value selectors for application to the output terminal. When a "black going" transient occurs, the output switch sequentially selects the outputs of the maximum and minimum value selectors for application to the output terminal.

Abstract: A tunable antenna system operates over a predetermined frequency range with an antenna having a length and width each significantly less than a quarter wavelength within the predetermined frequency range. A controllable reactive element is coupled to the antenna and has a variable reactance for tuning the antenna in a resonant circuit to the frequency of a desired signal in the predetermined frequency range. An antenna-tuning circuit is responsive to the frequency to which the antenna is tuned for providing an antenna-tuning signal to the controllable reactive element to control the reactance of the controllable reactive element so that the antenna remains tuned to the desired signal. The antenna tuning signal includes a dither component of dither frequency for varying the tuning of the antenna around the desired signal. The antenna tuning circuit includes a level detector for providing a level signal representative of a signal transduced by the antenna.

Abstract: A decoding arrangement for decoding audio signals previously encoded in accordance with the dbx format, includes a wideband expander instead of a full dbx expander. The wideband expander employs a relatively simple, and therefore inexpensive, peak detector in place of the true RMS detector of a full dbx expander, and does not include apparatus for spectral expansion of the audio signal. Although the decoding is noncomplementary with respect to the encoding, the stereo audio reproduction as perceived by a listener, is surprisingly good.

Abstract: A receiver for receiving a stereophonic signal with upper and lower sidebands carrying a modulating signal includes independent sideband circuitry for providing upper and lower sideband signals. Selector circuitry responds to the level of audible noise in each of the upper and lower sideband signals for selecting that one of the sideband signals having a lower level of audible noise relative to the other. An ISB highpass filter filters the latter sideband signal to provide a highpass filtered sideband signal. Stereo detector circuitry provides left and right stereophonic audio signals. At least one audio lowpass filter filters the left and right stereophonic signals to provide corresponding lowpass filtered left and right stereophonic audio signals. At least one signal combiner combines the highpass filtered sideband signal with each of the lowpass filtered left and right stereophonic audio signals to provide corresponding composite left and right audio signals.

Abstract: A decoding arrangement for decoding audio signals previously encoded in accordance with the dbx format, includes a wideband expander instead of a full dbx expander. The wideband expander employs a relatively simple, and therefore inexpensive, peak detector in place of the true RMS detector of a full dbx expander, and does not include apparatus for spectral expansion of the audio signal. Although the decoding is noncomplementary with respect to the encoding, the stereo audio reproduction as perceived by a listener, is surprisingly good.

Abstract: An apparatus and method for improvement of stereophonic sound. A source of stereophonic sound is provided with two internal loudspeakers and external access to the stereophonic signal. A "wall of sound" effect is achieved by coupling of the sterophonic signal to at least two external loudspeakers with the internal loudspeakers being fed a mixture of the sterophonic signal at reduced power.

Abstract: A convergence control system for a television apparatus, for example a projection television, comprises: a plurality of channels, each channel having a digital memory for storing a set of grid coordinate values defining a convergence correction grid; and, a pair of multiplying digital to analog converters for the grid coordinate values. A single circuit for generating sequential digital addresses is coupled to each of the channels for outputting the grid coordinate values from each of the digital memories to respective multiplying digital to analog converters of the channel. The values of respective horizontal grid lines are supplied to only one of the multiplying digital to analog coverters. A single waveform generator develops a pair of analog waveforms of complementary phase for modulating respective multiplying digital to analog converters of each pair in each channel. The sum of the modulating waveforms is constant.

Abstract: Apparatus for adjusting capacitance between an electronic component and external circuitry. The electronic component is unitarily provided with a plurality of conductive leads for connection to external circuitry with at least one of the leads being configured to provide integral means for adjustment of capacitance. The configured lead is bent for a turnabout of about 180 degree change of direction such that when the component is mounted on a printed circuit board the portion of the lead distal of the component extends above the board and is positionally adjustable providing adjustable capactive coupling to other circuit components.

Abstract: A so-called "V.sub.BE multiplier" circuit is used to temperature compensate a semiconductor device with respect to both short term self-heating effects and long term ambient temperature effects. The compensation circuit includes a transistor with a base, an emitter coupled to an operating potential, and a collector coupled to an operating potential. First and second resistors are respectively coupled across the base-emitter and collector-base junctions of the transistor. The values of the resistors as chosen so that a voltage derived from the collector-emitter path of the transistor and applied to the semiconductor device exhibits a temperature coefficient which substantially matches the temperature coefficient of the semiconductor device.

Abstract: A stereo television receiver processes the picture and intercarrier sound carrier signals in a common intermediate frequency (IF) section. The IF characteristic is modified such that the overall transmission characteristic of the receiver exhibits a modified Nyquist slope having a shelf portion of flat attenuation over a frequency band including within it the picture carrier frequency. This reduces the incidental phase modulation of the picture carrier signal due to asymmetrical attenuation of sidebands by the Nyquist slope, thereby reducing the associated intercarrier buzz.

Abstract: A television receiver is arranged to selectively display either information from a broadcast television signal or information from an auxiliary video signal, in accordance with the position of a switching network to which the signals are capacitively coupled via respective capacitors. Similar black reference levels are established for the television and auxiliary signals by means of respective clamping circuits, including the coupling capacitors, which operate at different times but with respect to the same clamping reference voltage.