Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 4387400 | Tuning system for a television receiver A tuning system is described for use with a television receiver which has channel selection keys on a keyboard for selecting a desired television channel. The system employs a frequency synthesizer for tuning the receiver's local oscillator to a selected ... | 06/07/1983 |
| 4385315 | Phase locked loop tuning control system including a timed sync activated AFT signal seeking arrangement In a phase locked loop PLL tuning control system for a voltage controlled oscillator of the type wherein an automatic fine tuning (AFT) voltage is selectively applied to the local oscillator after a PLL configuration has obtained lock at the nominal frequ... | 05/24/1983 |
| 4379269 | RF Amplifier having automatic gate bias switching in response to band selection Herein disclosed is an RF amplifier which is equipped with a high-frequency amplifying element such as a dual gate MOS FET having its first gate fed with a bias voltage and its second gate fed with an AGC voltage, in which a switching diode is fed with a ... | 04/05/1983 |
| 4375651 | Selective video reception control system A system for controlling a channel/band selective microcomputer programmed indirect frequency synthesis tuner is disclosed. Separate groups of VHF, UHF or CATV channels are programmed by means of a key switch having various positions of engagement corresp... | 03/01/1983 |
| 4360832 | Frequency synthesizer tuning system for television receivers A television tuning system employs a frequency synthesizer system for establishing the tuning of the receiver. A programmable frequency divider counter is connected between the output of a reference oscillator and a phase comparator to which the output of... | 11/23/1982 |
| 4349840 | Apparatus for automatically steering an electrically steerable television antenna In a television receiver having an in-cabinet receiving antenna that has a plurality of electrically controllable states having different radiation reception pattern conditions, an automatic antenna steering apparatus selects one of the controllable patte... | 09/14/1982 |
| 4340975 | Microwave mixing circuit and a VHF-UHF tuner having the mixing circuit In a double superheterodyne tuner for receiving TV channel signals, a frequency in a range defined between 2520 and 2700 MHz is selected as the first intermediate frequency, while the first intermediate frequency is obtained by subtracting a desired chann... | 07/20/1982 |
| 4337486 | Synchronizing signal discriminator for use in channel selection apparatus of television receiver A synchronizing signal discrimination circuit for use in a channel selection apparatus having a preset function of a television receiver is disclosed. The circuit has a function to discriminate a periodic and continuous signal and a non-periodic and one-s... | 06/29/1982 |
| 4336555 | Video accessory having channel identifier A video disc player, for use with a television receiving device having a tuner, includes a power switch, a source of baseband video signal and a switchable multi-channel TV modulator. Upon closure of the power switch the baseband signal is modulated on a ... | 06/22/1982 |
| 4330792 | Video blanking circuit with controlled rate of unblanking A circuit is disclosed for automatically blanking the kinescope of a color television receiver during channel changing intervals. The receiver also includes an automatic kinescope beam current limiter, plural kinescope driver stages, and a source of refer... | 05/18/1982 |
| 4329684 | Apparatus using a light sensing system for sensing time modulated information from a light emitting device An electronic control system for a television receiver (12) incorporates a light pen (10) which can be applied to selected portions (16) of the screen (14). These portions (16) are modulated (FIG. 2) at the field scan rate by data inputs such that in succ... | 05/11/1982 |
| 4328517 | Channel selection apparatus for television receiver A channel selection apparatus of a television receiver having a sequential shift signal input terminal for receiving a sequential shift signal to sequentially shift a selected channel position and an electronic tuning type channel selection IC having a de... | 05/04/1982 |
| 4326296 | Tuning system for a color television receiver having a varactor tuner An improved tuning system for a color television receiver embodying a varactor tuner having a controller functioning as a potentiometer to provide a preselected tuning voltage for channel selection. The system includes a tuning voltage supply having a low... | 04/20/1982 |
| 4326220 | Television receiver A television receiver includes first and second signal receiving circuits corresponding to first and second channels, each circuit having a tuner and VIF amplifier with each tuner being response to a tuning control voltage supplied thereto; first and seco... | 04/20/1982 |
| 4320533 | Frequency stabilized downconverter facilitating output frequency alteration A downconverter having a voltage controlled local oscillator supplied with a control DC voltage, obtained from a frequency discriminator and responding to variations of the difference between a reference produced by a stable oscillator and an output signa... | 03/16/1982 |
| 4271433 | SAW Filter preamplifier A preamplifier is provided which couples a television tuner to a surface acoustic wave (SAW) filter and amplifies the I.F. signals supplied by the tuner so as to overcome the signal losses of the SAW filter. The preamplifier comprises a single transistor,... | 06/02/1981 |
| 4267563 | Channel selecting apparatus for use with signal receiver and signal recorder Channel selecting apparatus for use with a signal receiver coupled to a first tuning device and a signal recorder coupled to a second tuning device is operable to tune the first and second tuning devices to preselected channels for receiving broadcast fre... | 05/12/1981 |
| 4262307 | Fine tuning circuit A circuit for applying a fine tuning voltage to an oscillator operating within distinct ranges of frequency. The fine tuning voltage is tailored so that a substantially equal fine tuning range, for example, &#b1;1.5 MHz, is achieved with respect to each o... | 04/14/1981 |
| 4261016 | Television receiver An automatic fine tuning loop in a television receiver is controlled by phase comparison between a video intermediate frequency signal and a reference oscillator signal. The reference oscillator signal is used in synchronous detection of the video interme... | 04/07/1981 |
| 4259690 | Multi-picture tuning scheme of television receiver A multi-picture tuning scheme suitable for a television receiver of the type which displays at least two kinds of television pictures simultaneously on a same screen tube employed therein includes a series of channel selection switches, a control switch, ... | 03/31/1981 |
| 4249256 | Continuous tuning arrangement for a multiband television receiver A television tuning system for generating a tuning voltage for a varactor controlled local oscillator includes a continuous resistive element having first, second, third and fourth points along its resistive path which define first, second and third resis... | 02/03/1981 |
| 4228543 | Programmable television receiver controllers Programmable television receiver controllers which may be manually programmed by a user to select or to limit the viewing selections for random times, typically in one-half hour intervals, throughout a predetermined time period such as a one week time per... | 10/14/1980 |
| 4227217 | Multiplexing arrangement for a television signal processing system A channel number display arrangement for a television receiver includes a multiplexer for alternately coupling binary signals representing the tens and units digits of the channel number of a selected channel to a single decoder and driver arrangement. To... | 10/07/1980 |
| 4215372 | Television signal interference elimination circuit including a trap circuit A television signal processing circuit having an RF tuner includes a frequency responsive trap connected to a signal path of an IF amplifier to reject an undesirable interfering signal applied from the local oscillator of another tuner when the RF tuner a... | 07/29/1980 |
| 4214273 | Circuit for indicating antenna signal input level on television receiver screen A circuit for use in a television receiver to obtain a variable-length bar on the television screen which indicates the optimum antenna position, the circuit comprised of at least two monostable multivibrators with input terminals triggered by horizontal ... | 07/22/1980 |
| 4205347 | Television signal determination in an automatic tuning system A television signal determination circuit is associated with an automatic tuning system, which automatically tunes a television set to local channels, in order to determine whether received signals are desired television signals. The television signal det... | 05/27/1980 |
| 4163259 | Windowed tuning system with synchronous detector A television receiver includes automatic fine tuning, synchronous detection, and a "window" type tuning system. The synchronous detector has a detector oscillator which is tunable to the nominal frequency of an intermediate frequency signal derived from a... | 07/31/1979 |
| 4157504 | VHF Television tuner with easy/flexible access A VHF television tuner for selection of a broadcasting television signal through mechanical switching selection of inductance coils, comprising; a tuner casing; a mechanical channel selection switch arrangement provided in said casing and including a rota... | 06/05/1979 |
| 4139865 | Television receiver with video changeover switch responsive to channel selector A televison reciver for reproducing a picture selectively derived from a television signal or from an external video signal, including a television tuner having a variable reactance device as a tuning element, a video detector coupled to said television t... | 02/13/1979 |
| 4128849 | Selectively coupled synthesizer for tuner of TV receiver A television receiver is disclosed including a varactor-type tuner selectively coupled to a synthesizer. Illustratively, the synthesizer includes a keyboard for selecting the desired channel within the UHF or VHF band, a channel memory for receiving and s... | 12/05/1978 |
| 4123781 | Television tuner with fine tuning means A television tuner including a fine tuning mechanism, said mechanism comprising a cam body provided to a sleeve rotatably disposed around the operating shaft, said cam body having a cam surface adapted to convert rotary motion to reciprocating motion, and... | 10/31/1978 |
| 4109283 | Frequency counter for a television tuning system A tuning system for a television receiver includes a local oscillator which is controlled first by a phase lock loop arrangement and then by an AFT discriminator arrangement for tuning the receiver to non-standard as well as standard frequency carriers. T... | 08/22/1978 |
| 4106059 | Phase locked loop television tuning system A phase locked loop tuning system for a television receiver includes a voltage controlled local oscillator for generating a local oscillator signal corresponding to the channel presently selected by a viewer, a source of a reference frequency signal, a ph... | 08/08/1978 |
| 4078212 | Dual mode frequency synthesizer for a television tuning apparatus Television tuning apparatus includes a first phase locked loop configuration for tuning a local oscillator to a nominal frequency appropriate for converting a standard radio frequency carrier allocated to a selected channel to a predetermined intermediate... | 03/07/1978 |
| 4038689 | Frequency synthesizer tuning system with manual fine tuning control A television tuning system employs a frequency synthesizer system for establishing the tuning of the receiver. A first programmable frequency divider controlled by a reversible counter is connected between the output of a reference oscillator and a phase ... | 07/26/1977 |
| 3962533 | Television receiver In a television receiver using synchronous detection of the I.F. signal a picture carrier regenerator is used which is active for a small deviation of the picture intermediate frequency relative to the regenerator frequency and is passive for a large devi... | 06/08/1976 |
