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| Number | Title | Issue Date |
| 7158055 | Key input circuit, power supply control apparatus, and power supply control method A key switch 102 formed by arranging a plurality of key contacts SW11, SW12, SW21, SW22, . . . at cross points of a key matrix is provided with a power supply control key (SW11), and a key scan circuit 101 for detecti... | 01/02/2007 |
| 6906695 | Touch control apparatus and touch control method that can be applied to electronic instrument A touch curve memory 110 stores therein a touch curve formed by velocity values corresponding to touch data generated by a keyboard device 20. A correction coefficient generator 10 generates a correction coefficient composed of a ratio of one of... | 06/14/2005 |
| 6748568 | Apparatus and method for verifying proper data entry and detecting common typing errors A method and apparatus for detecting typing errors of critical fixed series of characters (digits) by using at least one redundant parity digit. The invention detects the most common typing errors that involve both permutations and incorrect striking of adjacent cha... | 06/08/2004 |
| 6288652 | Digitally encoded keyless entry keypad switch A five-switch keypad apparatus having four diodes that multiplex the switch contacts onto three sense terminals. The three sense terminals create a binary code that defines eight possible switch states. The eight states are used to indicate each individua... | 09/11/2001 |
| 6236339 | Key, input unit using such key, and control system comprising such input unit and electronic apparatus acoustically connected to such input unit A key for transmitting data to an electronic apparatus includes a key top, a sound generating mechanism connected to the key top for generating a predetermined sound without any electrical power supply when the key top is depressed, and an outer sleeve re... | 05/22/2001 |
| 4616213 | Capacitive multikey keyboard for inputting data into a computer A multikey keyboard for inputting data into a computer, wherein pressing a key places in circuit the point of intersection of a row conductor and column conductor respectively connected to portions of separate row and column sequential series of capacitor... | 10/07/1986 |
| 4599607 | Acoustic keyboard An acoustic keyboard comprises a plurality of keys arranged in a matrix. A plurality of reflector members, each one associated with a different one of the keys, reflect acoustic energy when the associated key is actuated. Acoustic energy is emitted from a... | 07/08/1986 |
| 4555693 | Multikey keyboard for inputting data into a computer A multikey keyboard for inputting data into a computer, whose keys place in circuit the points of intersection of an X rank conductor and Y rank conductor matrix, characterized in that X rank and Y rank conductors are respectively connected together by in... | 11/26/1985 |
| 4529967 | Non contacting inductive keyboard An inductive keyboard, including, printed circuit patterns forming a multiplicity of key excitation patterns and key sensing patterns. The key excitation patterns are divided into groups of excitation patterns formed in rows. The key sensing patterns are ... | 07/16/1985 |
| 4518951 | Integrated circuit for a keyboard of an electronic apparatus This circuit, controlled by the counter (Z) and via the row transistors (ZTm) and upon actuation of a pushbutton key, successively interrogates the row lines (1m) and, via the column line (2n) as connected to the row line, forms an inverter with the corre... | 05/21/1985 |
| 4502040 | Keyboard having keys activated by electrical contacts and the capacity to read one state from among four possible states A keyboard having keys activated by electrical contacts and the capacity to read one state from among four possible states, wherein the keyboard is a dipole disposed between two terminals between which are positioned in parallel three connectors, each inc... | 02/26/1985 |
| 4498073 | Keyboard with simultaneous operations A keyboard in which, when one of the function keys is depressed simultaneously with one of the character keys, the signal generated by the depressed function key is transmitted during a first period of time following the key-stroke which depressed the key... | 02/05/1985 |
| 4495485 | Touch control arrangement for data entry A touch control arrangement which employs a touch panel comprising a plurality of touch keys and a network of electrically connected capacitive elements; an oscillator which incorporates the network of capacitive elements in its timing circuit; and a micr... | 01/22/1985 |
| 4442506 | Portable word-processor A portable word-processor comprising the following components; a microprocessor and, connected thereto, a manually operable input chord keyboard having four finger keys and at least one thumb key, the microprocessor being programmed to respond to signals ... | 04/10/1984 |
| 4430644 | Encoding apparatus having an acoustic member with mirror-image tabs A simplified, symmetrical encoding apparatus of the acoustic rod type with polarized output signals, e.g., where key-actuated strikers impact an acoustic bar having a number of differently-shaped tabs on the bar, the impact giving rise to divergent acoust... | 02/07/1984 |
| 4417824 | Optical keyboard with common light transmission members A keyboard assembly (FIG. 1, 11) is constructed of first light transmission members (13) second light transmission members (15), a key actuation assembly (17) having a matrix of keybuttons (25), plural light source assembly (19) and plural sensor assembly... | 11/29/1983 |
| 4415781 | Membrane switch A membrane switch in which switch activation produces a change in the combined resistance and capacitance across leads of the switch.... | 11/15/1983 |
| 4412209 | RC Array A switch assembly with a different combination of resistance and capacitance associated with each of a plurality of switches and with as few as two leads connecting the plurality of switches to external circuitry. The external circuitry detects switch act... | 10/25/1983 |
| 4395587 | Method and apparatus for representing characters A method and apparatus for representing characters employ a printing unit to print symbols which correspond to characters, the characters being represented either by individual printed symbols or by two or more symbols printed in sequence or two or more o... | 07/26/1983 |
| 4384633 | Perforated acoustic transport member An improved acoustic transport member for use in a keyboard having key operated strikers individually actuatable for inducing acoustic energy in the form of sound waves which propagate through the member from selected inducing positions therealong. A firs... | 05/24/1983 |
| 4381500 | Keyboard apparatus A keyboard apparatus has item keys for data entry, and select keys for changing the display of input data written on sheets, according to the item keys, and a changer for the sheets stored in a cartridge, which separates the sheets in the cartridge into t... | 04/26/1983 |
| 4381502 | Method and apparatus for character generation Generation of a character code for an alphabetic character is performed by depressing at least two keys in a sequence. The code is generated when the last key is depressed and the other keys in the sequence still are pressed, or when all keys in the seque... | 04/26/1983 |
| 4381501 | Encoding apparatus utilizing acoustic waves of controlled initial polarity Polarity of transducer signals is controlled in encoding apparatus of the acoustic rod type, e.g. where key-actuated strikers impact an acoustic bar having a transducer at each end of the bar, the impact giving rise to divergent acoustic waves. The wave f... | 04/26/1983 |
| 4376469 | Stepped acoustic transport member An acoustic transport member for use in a keyboard having key operated strikers individually actuatable for inducing acoustic energy in the form of sound waves which propagate through the member from selected inducing positions therealong. A first portion... | 03/15/1983 |
| 4375060 | Electronic apparatus having special key Electronic apparatus having transmission capability of data from memory to a transmission line, such as a telephone line, having print-out capability of the data being transmitted, and having a control function, in response to actuation of a special key, ... | 02/22/1983 |
| 4360892 | Portable word-processor Disclosed herein is a portable word-processor comprising the following components; a micro-processor and, connected thereto, a manually operable input chord keyboard having four finger keys and at least one thumb key, the micro-processor being programmed ... | 11/23/1982 |
| 4346369 | Keyboard encoder-decoder A keyboard encoder/decoder and method is provided for encoding on a keyboard output into a serial format data word representative of one and only one actuated key for transmission to an external device, and for decoding a serial format data word received ... | 08/24/1982 |
| 4344068 | Coding schemes for acoustic delay line data collection system A magnetoacoustic system adapted to use as a keyboard can employ a serpentine acoustic delay line passing under a number of transducers which are activated simultaneously with a current pulse through the wire. Magnets adjacent to the wire generate magneto... | 08/10/1982 |
| 4344069 | Method and apparatus for character generation Generation of a character code for an alphabetic character is performed by depressing at least two keys in a sequence. The code is generated when the last key is depressed and the other keys in the sequence still are pressed, or when all keys in the seque... | 08/10/1982 |
| 4329541 | Dialing system for teleprinter A dialing system which utilizes a keypad on teleprinters retrofitted into existing teleprinter models through interfacing by voltage biasing and output circuitry with integrated circuit components having inputs to the teleprinter keypad and a pulse driver... | 05/11/1982 |
| 4319077 | Circuit for coded symbol conversion A circuit for coded symbol conversion has first and second memories and a switching stage. Standard code characters from a keyboard are entered into the first memory and if the entered character is one which can be represented by a single binary word the ... | 03/09/1982 |
| 4311991 | Acoustic transmission member An acoustic transmission member is disclosed for use in an encoding system utilizing acoustic energy wherein diverging sound waves are induced within the member in response to selected actuation of a striker positioned along the member. The time taken by ... | 01/19/1982 |
| 4298861 | Integrated ultrasonic magnetic encoder An ultrasonic waveguide provides the encoding of magnetic keys on a keyboard. The magnetic keys couple their respective magnetic fields to an ultrasonic waveguide producing signals in a given time relation to permit encoding by depressed keys. Since the n... | 11/03/1981 |
| 4277778 | Information transmitting system A system for transmitting information from a plurality of observation stations to a central station, especially for military purposes. Every observation station is equipped with a coder and a code transmitter for selecting and transmitting code signs corr... | 07/07/1981 |
| 4258356 | Multi bar encoding apparatus utilizing acoustic energy An encoding apparatus in which strikers actuated by the keys of a keyboard, for example, impact selected ones of a group of parallel bars (equivalent to sonic delay lines) at points substantially equally distant from single transducers located on each bar... | 03/24/1981 |
| 4241333 | Key-operated arrangement for producing code characters A key-operated arrangement for teleprinters as a keyboard for encoding characters and data arranged in matrix fashion in rows and columns. Along with the keyboard an addressable fixed-value store is provided. A scanning device periodically scans the keybo... | 12/23/1980 |
| 4231016 | Input signal recognition circuit An input signal recognition circuit for a control system having an array of momentary switching elements (hereinafter referred to as "keys") whose number is larger than that of the array input terminals, which prevents erroneous control system operation w... | 10/28/1980 |
| 4190826 | Multidevice position digital encoder At least one movable device is mechanically coupled to a coupling device which moves in response to the motion of the movable device. The coupling device moves in a path which closely parallels the path of a time-varying, propagating electric field. Upon ... | 02/26/1980 |
| 4140872 | Control system for functional sequences A control system is disclosed for the control of sequential flow of functions in teletypewriters and data typewriters. Input signals are presented to the control system which release the carrying out of the functions. The control system produces output si... | 02/20/1979 |
| 4138197 | Key actuator Actuator for use with a push-button keyboard in which the keys are arranged in an array of intersecting rows and columns. A single solenoid is provided for each row and column, and means operated by the solenoids causes the key to be depressed at the inte... | 02/06/1979 |
