Class 235/145R - KEYBOARDS

Subclass of Class 235 - Registers
Definition: Subject matter comprising those portions of registers, usually
No. of patents: 196
Last issue date: 06/28/2011

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Number	Title	Issue Date
4292510	Keyboard for a miniature calculator A calculator keyboard includes a face plate and a plurality of keys supported in a predetermined location with respect to the face plate. In the face plate there are provided narrow recesses in alignment with respective keys. Each recess has a width dimen...	09/29/1981
4257555	Thermostat assembly A programmable thermostat features a memory unit receptive of unit values of temperature desired at different times on different days all individualy or in various combinations both as to days and times. An output device signals a temperature control syst...	03/24/1981
4203013	Alphanumeric control keyboard with depressible keys for electric or electronic machines A control keyboard for electric or electronic machines, with a first plate having a number of apertures, and keys mounted through these apertures; the keys have flanges of magnetic material on their lower portions to prevent the keys from slipping out. A ...	05/13/1980
4180336	Touch checking key tops for keyboard Touch checking key tops for keyboard on a cash register in which the keyboard is provided with a plurality of keys arranged in a generally rectangular matrix with the keys being arranged in three rows extending in one direction and three rows extending in...	12/25/1979
4160886	Keyboards and methods of making keyboards A data entry keyboard includes a key array overlying a switching assembly so that a switch is operated when a corresponding key is depressed. The key array is made by forming a transparent plastic sheet into a blank having a number of upwardly extending k...	07/10/1979
4159183	Keyboard employing photoelectric key actuation sensing In a key-operated machine in which actuation of a key moves code elements of an associated code card into the path of a photoelectric sensing system, each code card is moved by a drive mechanism so as to cause the code elements to traverse the sensing sys...	06/26/1979
4158130	Interchangeable auxiliary keyboard A low cost, self locating auxiliary keyboard assembly is disclosed for changing the key configuration and classification of the keyboard of a data terminal device, the assembly including a cover member having a plurality of apertures which overlie associa...	06/12/1979
4133989	Device to identify chords on a keyboard instrument and key mechanism for use therewith Operation of a pushbutton or key mechanism by the operation of a single pushbutton or key through circuitry which may include fiber optics signals all keys on the keyboard included in the particular chord. The device may be built in or simply attached to ...	01/09/1979
4124313	Keyboard assembly A keyboard assembly includes a U-shaped carrier member and a plurality of key members connected thereon by resiliently yieldable legs having detent portions which engage cooperating recesses provided in the bottom wall of the U-shaped carrier member with ...	11/07/1978
4119839	Keyboard mask for general-purpose calculator In order to adapt a general-purpose calculator to specific tasks, the keyboard of that calculator is covered by a mask including a resilient membrane overlain by a rigid panel having cutouts registering with keys whose function is to be preserved. The cut...	10/10/1978
4100402	Keyboard key with changeable indicia A key in a keyboard for programmable computers, having its farther end recessed to form a nail-sparing shelf for carrying an exchangable mark or indicia. According to the invention the shelf serves as a seat for a flat and transparent pocket for receiving...	07/11/1978
4084214	Modular housing for electronic apparatus A modular housing molded of a thermoplastic material and arranged for containing electronic circuitry is disclosed. The modular housing includes a box-like base unit, two removable modules, and a rear cover unit. The base unit forms a first housing for co...	04/11/1978
4078257	Calculator apparatus with electronically alterable key symbols A calculator system having a transparent keyboard includes an apparatus for electronically labeling the keyboard by displaying alphanumeric symbols through the keyboard. The apparatus comprises a keyboard selection device and a liquid crystal keyboard dis...	03/07/1978
4075465	Keyboard overlay An exchangeable overlay for changing the character representations associated with the keys of a keyboard. The overlay is disposed on the keyboard and has openings to receive each key thereof with the inner portion of each opening above an associated key ...	02/21/1978
4071719	Keyboard switch assembly having actuator interlocking keyboard shift and shift lock and release mechanism A keyboard shift and shift lock and release mechanism consisting of two shift keyswitches and one shift lock keyswitch is provided by the interaction of cams molded on the actuating plungers of the keyswitches and a slide member on each keyswitch which ca...	01/31/1978
4069659	Electronic switch activated by current flow through the human body An electronic circuit having two states, at least one of which is stable and which permits information to pass from one terminal to the other. The circuit can be activated by the flow of a minute electric current through the human body. The circuit is par...	01/24/1978
4066850	Keyboard switch assembly having interchangeable cover plate, indicating layer and actuator switch assembly in any operative combination A printed circuit keyboard assembly is disclosed comprising a waterproof jacket portion which includes a cover member overlying a sheet of raised key-tip portions, the jacket portion being releasably mounted to a position adjacent the waterproof switch ma...	01/03/1978
4065650	Electronic calculator with switches in solid V- and U-shaped groups In a hand-operated electronic calculator, a switchboard having push-button switches for digits and symbols, every two or more switches combined into V, or U, or square shaped groups either above the surface or recessed for receiving fingertips and actuate...	12/27/1977
4060163	Keyboard Guard A guard for protecting the keys of a keyboard from being untimely depressed, the guard is formed of a rigid material, such as an acrylic plastic, and contains an aperture(s) therethrough for accommodating the positioning of the keys therein, so as to avoi...	11/29/1977
4057710	Keyboard assembly A keyboard assembly comprising a plurality of actuating keys, and a sheet of flexible thin plastic film, the keys being bonded to the film. The keys have upper and lower portions, said lower portions being sandwiched between said upper portions and film a...	11/08/1977
4055734	Keyboard switch assembly with hinged pushbuttons and cantilevered terminal members A keyboard switch assembly having an apertured plate, a plurality of pushbuttons supported in the apertures and a hinge for so supporting the pushbuttons that is integral with both the panel and the pushbuttons. The hinge has a web extending between the p...	10/25/1977
4042439	Method of making keyboard assemblies A keyboard assembly includes an insulative substrate upon which are carried a plurality of conductive paths. Respective portions of the paths are selectively bridged upon depression of a dome-shaped conductive resilient contact element. A pair of space-op...	08/16/1977
4039068	Keyboard of elastic material for office machines In an office machine keyboard comprising a layer of elastic material provided with individually depressible reliefs representing the keys, each having a top fingering surface, the characters are composed of a second elastic material moulded in accordance ...	08/02/1977
4036128	Branding iron with quickly changeable characters A marking device in the form of a branding iron having a plurality of sets of marking elements in the form of line segments mutually positioned and oriented to comprise line elements common to a plurality of recognizably different characters, together wit...	07/19/1977
4032729	Low profile keyboard switch having panel hinged actuators and cantilevered beam snap acting contacts A low profile keyboard switch with tactile feel and short key travel is disclosed. The keyboard may be a matrix connected keyboard and includes a lower, fixed contact and an upper, concave contact. The concave contact is supported at one end and operates ...	06/28/1977
4030094	Device for selecting computer operational mode and labeling input controls accordingly The device is a translucent plastic mask or overlay which fits over the keyboard of the computer input/output station to label the keys with their functions according to the selected mode of operation. A projecting portion along one of the edges of the ma...	06/14/1977
3974496	Data entry systems This invention relates to the presentation of at least two different sets of information to an observer simultaneously and in the same location, one superposed upon the other, one set of information concerning characters inscribed on a source carrier or d...	08/10/1976
3964593	Keyboards A key for an electronic keyboard comprises a plunger in a body which is mounted on the keyboard chassis and striker, with a helical spring within the plunger for engaging the striker. To provide required tactile characteristics, a further spring means, e....	06/22/1976
3962556	Keyboard with versatile switch support structures A keyboard has contact pairs on a substrate and has a support with openings therein secured over and spaced from the substrate with the support openings aligned with respective contact pairs on the substrate. Switch mechanisms disposed in the support open...	06/08/1976
3954085	Self-restoring changeable exhibitor/keyboard A changeable exhibitor, with or without keyboard structure, is rendered self-restoring by use of a flexible strip arranged to lie in a selectable looped position indicative of the data being exhibited or being entered into an associated data processing sy...	05/04/1976
3955074	General purpose calculator having keys with more than one function assigned thereto A battery-powered, hand-held calculator employs MOS/LSI calculator circuits to perform arithmetic and financial calculations. Data and commands are input to the calculator from a keyboard having a prefix key to double the functions of selected keys. A 15-...	05/04/1976
3951250	Capacitive key for electronic circuit In a keyboard for an electronic circuit having a striker on each key formed of electronic material which is conductive or carries a conductor and which is moved downwardly towards a fixed conductor assembly to provide capacitive coupling, it is found that...	04/20/1976
3950634	Keyboards The device of this invention has a housing disposed to fit over the nine keys or push-buttons, numbered 1 through 9 of a push-button array of a calculator or push-button telephone, or the like. Push-button operating means are provided with U-shaped member...	04/13/1976
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 keys and linkage may be formed as a unitary plastics moulding....	02/24/1976
3937939	Single-hand digital calculator An electronic digital calculator, the calculator being in the form of an elongated tubular body having a size and shape similar to a pen or pencil and having a plurality of input valve setting keys and function keys carried on its surface as well as illum...	02/10/1976

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Class 235/145R - KEYBOARDS