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6962452 Keyboard having key floating device  
A keyboard includes a housing having a number of passages formed by cylindrical members, a number of keys each having a shank slidably engaged in the passages of the housing, and an...
6685369 Housing assembly for membrane keyboard  
A housing assembly in which is placed a membrane keyboard is placed between the pressing layer and the base support. Pressing labels and key zones are respectively printed on a surface of the...
6491457 Apparatus and method for deriving electric power efficiently from a keyboard  
A keyboard apparatus has keys for operation by a user. The keyboard includes a first plurality of keys being coupled to electrical generator apparatus for generating electricity from their...
6407679 System and method for entering text in a virtual environment  
A system and method for entering text in a virtual environment by sensory gloves. The user enters a key that represents one or more letters by simulating a press of a keyboard in the gloves. The...
5066951 Circuit arrangement for adjusting the triggering point of an inductive keyboard  
The present invention is directed to a circuit arrangement for adjustment of the triggering point of the keys in an inductive keyboard. The keyboard consists essentially of a printed circuit board...
4722621 Keyboard assembly and recording apparatus  
A keyboard assembly for selecting characters to be recorded includes a substrate carrying an array of characters arranged on one face thereof. A character selection device moves between advanced...
4665461 Circuit for reducing electromagnetic interference from magnetic core keyboards  
The present disclosure describes circuit variants for reducing electromagnetic interference from saturable core keyboards to acceptable levels. The invention finds particular application in...
4564832 Membrane keyboard having key closure retention  
A membrane panel keyboard is presented having magnetic material in one contact element and magnetic field generating means to achieve self-retention or key closure retention when a key is actuated.
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...
4507651 Contact-free push-button key for generating an electrical signal upon depression thereof  
A contact-free push-button key for converting mechanical energy into an electrical signal has a toroidal tape core comprised of material having a low magnetic retentivity such as an amorphous...
4494109 Noncontacting keyboard employing a transformer element  
Noncontacting transformer switches are interconnected into keyboard networks which include insertable magnetic core, shorted turn or combination actuators. In a preferred embodiment, windings are...
4414537 Digital data entry glove interface device  
A man-machine interface is disclosed for translating discrete hand positions into electrical signals representing alpha-numeric characters. The interface comprises a glove having sensors...
4264225 Bounce dampening system for switch actuators  
A bounce dampening system reduces switch actuator bounce when the actuators are restored to their home position. Included are selection interposers, one of which is selectively driven to thereby...
4201489 Keyboard actuatable with the aid of the fingers of at least one hand  
A keyboard which has support frame, or several rows of key units. Each key is movable out of an initial inoperative position by the tip of the index finger. The key of each key unit of a guide key...
4016967 Decoding means with error inhibitor for use with a typewriter  
Apparatus is disclosed for attachment to a standard typewriter for selectively actuating one or more of a plurality of magnetically actuated switches to provide unique electrical signals that can...
3972403 Decoding means for use with a typewriter  
Apparatus for attachment to a standard typewriter for selectively actuating one or more of a plurality of magnetically actuated switches in electrical circuits that are connected to recording...
3964062 Keyboard switch system  
A keyboard switch system for stenographic machines whereby electrical signals corresponding to key depression may be derived. The switch system is comprised of a plurality of coils each having a...
3940578 Keyboard structure having panel mounted key actuators with electrical component operating element  
An electronic keyboard has a chassis with keys each utilising a parallel motion linkage to permit movement of an operating member towards an electric circuit element. The main structure of the...
3763985 REVISION TYPEWRITER SYSTEM  
A tape reader and perforator electrically communicate with an electric typewriter through control and logic circuits. A plurality of magnetic actuators are provided for transferring typewriter...
3757920 ELECTRIC TYPEWRITER WITH INPUT-OUTPUT ARRANGEMENT  
An electric typewriter is adapted to input-output functions without increasing the height thereof by arranging, at the rear and within the bottom of the typewriter, a supplemental structure...
3750796 SELF-INTERLOCKING KEYBOARD  
A keyboard having magnetically actuated reed switches and interposers swingable between the switches and adjacent magnets for opening and closing the switches in response to key-operated...
3715023 CAM-AND-LINKAGE ARRANGEMENT FOR SIMULTANEOUS MOVEMENT OF MULTIPLE KEYSTEMS CONNECTED TO A COMMON KEY  
1298546 Electric switches NATIONAL CASH REGISTER CO 20 July 1971 [7 Aug 1970] 33998/71 Heading H1N [Also in Division B6] A keyboard includes at least one key 22, 24 supported on two keystems 16...
3707619 ACTUATING APPARATUS FOR A BUSINESS MACHINE  
An actuating apparatus for entering data into a pin-box type business machine having a plurality of selectively and individually operable character and function keys wherein solenoids are provided...
3698531 SOLID STATE SWITCH  
The disclosure describes a keyboard switch having two magnetic cores and a plurality of permanent magnets. The permanent magnets are mounted on a keystem and are movable with respect to the cores...
3693123 KEYBOARD HAVING MAGNETIC LATCHING AND IMPROVED OPERATOR TOUCH  
A keyboard comprising a plurality of key assemblies mounted in a mounting member and a base member. Each key assembly is provided with a magnet which provides both a magnetic latching and an...
3690432 MAGNETIC KEY DEVICE  
A key device for business machines and the like is provided which increases linearly the load smoothly when the key button or knob is depressed and can give a snap action, irrespective of the...
3678424 KEYBOARD SWITCH ASSEMBLY  
A keyboard switch assembly comprising a flat board printed with key input circuits and perforated with a plurality of apertures; and a plurality of key switch units inserted into the apertures,...
3651917 KEYBOARD MECHANISM AND ASSOCIATED CODE CONVERTING CIRCUITRY  
This invention relates generally to code conversion and more particularly to the production of electrical signals from a keyboard, the keys of which are operatively connected to one or more...
3651259 KEYBOARD OPERATED TELEGRAPH TRANSMITTER USING REED SWITCHES AND MAGNETIC SHUNTS  
There are five "reed switches" for a five level code, spaced apart and housed in a metal shielding compartment. A motor driven serializer or commutator having a rotatable contact arm movable over...
3648817 MAGNETIC SWITCH ASSEMBLY FOR CODING INFORMATION  
The present invention is directed to the improved mounting and disposition of a series of magnetic switching members utilized to convert the characters printed on a keyboard into coded electrical...
3619572 PUNCHED TAPE READER UNIT  
Reader unit for reading holes punched in a tape along rows transverse thereto comprising means for selectively advancing step-by-step in forward or backward directions, a group of readout levers...
3612241 KEYBOARD SWITCH CONSTRUCTION  
The disclosure describes solid-state keyboards employing a saturable magnetic core switch for each key. Each key has a keystem of magnetic material, the keystem having legs extending on opposing...
3610059 ARRANGEMENT AT KEYBOARD  
3594562 ACTUATING KEY  
An actuating key for use in a business machine having an electromagnet positioned therein so that the key may be operated by actuation of the electromagnet or may be actuated manually by the...
3592313 ENCODING KEYBOARD HAVING DUAL-OUTPUT SHIFT KEY  
An encoding keyboard constructed like that disclosed in U.S. Pat. No. 3,086,635, entitled "Keylever Storage Mechanism," issued Apr. 23, 1963, to Leon E. Palmer is provided with a novel dual...
3589494 KEYBOARD PRINTER WITH CONTINUOUSLY ROTATING TYPE MEMBER  
A keyboard printer for use as a peripheral element of a computer in which the codes of the characters are pulses exhibiting with respect with a start pulse variable discrete phase shifts. This...
3452850 TYPE BAR ACTUATOR COMPRISING SEQUENTIALLY OPERATING ELECTROMAGNETICALLY ACTING DEVICES  
3379297 Electric typewriter keyboard operated mechanism  
1,186,635. Typewriters. BURROUGHS CORP. 29 April, 1968 [3 May, 1967], No. 20246/68. Heading B6F. Machines with spheroidal type heads; full stroke arrangements.-A typewriter having a spheroidal...
3363737 Pulse generating key board  
3270853 Keyboard apparatus having means to control duration of actuation of circuit  
3251962 Precision magnetic keyboard switch  
3233715 Transmitter receiver machine employing print sphere typewriter structure  
3197010 Machine control devices  
975,519. Typewriters &c. INTERNATIONAL BUSINESS MACHINES CORPORATION. Aug. 28, 1961 [Aug. 26, 1960], No. 30959/61. Heading B6F. Keys; preventing accidental typing.- Operation of a key with too low...
2965212 Carriage tabulating mechanism suitable for proportional spacing typewriter  
2770304 Relay storage unit  
2613796 Continuously rotary characterwheel printing machine  
2060974 Educational device  
Application March 29, 17 Claims. This invention relates to an educational device and more particularly to a device by use of which operation of a typewriter or similar machine may be practiced and...
1430284 Typewriting machine  
1374152 Title is not available  
0900525 TYPE-WRITER.  

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