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Class 400/479.1 - Capacitance-responsive switch


Subclass of Class 400 - Typewriting machines
Definition: Subject matter wherein the device that completes the electrical
No. of patents: 32
Last issue date: 12/25/2007


NumberTitleIssue Date
7312790Input apparatus for performing input operation corresponding to indication marks and coordinate input operation on the same operational plane
An input apparatus includes a flat input device of a pressure-sensitive type or a capacitive type, and an indicator sheet on which indication marks are formed is fixed on the surface of the flat input device. A tactile-feel-generating unit is provided behind the fla...
12/25/2007
7253803Force feedback interface device with sensor
A force feedback mouse interface device connected to a host computer and providing realistic force feedback to a user. The mouse interface device includes a mouse object and a linkage coupled to the mouse that includes a plurality of members rotatably coupled to eac...
08/07/2007
7091886Flexible touch-sense switch
A flexible touch-sense switch includes a force sensitive composite and an at least one proximity sensor. The force sensitive composite includes a plurality of force sensors disposed between a first layer and a second layer of polymide film defining a displacement re...
08/15/2006
7088343Edge touchpad input device
A touchpad input device is provided that is disposed about at least a portion of at least one outside edge of an electronic device housing. The present invention also provides electronic devices comprising the present touchpad input device. Furthermore, the present ...
08/08/2006
6977666Flat panel display using dual CPU's for an aircraft cockpit
A thin flat panel display for aircraft cockpits. These displays use a dual CPU/graphics generator system to produce simulated aircraft instrumentation displays which are color coded to indicate when one of the graphic generators has not correctly received data from ...
12/20/2005
6869239Compact keyboard with sliding motion key actuation
A keyboard allowing typists to use approximate QWERTY finger movements on a more compact, collapsible, and portable keyboard. The keyboard size is made more compact by using thin capacitance-responsive surfaces as key switches for the rows above and below the home r...
03/22/2005
6685369Housing 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 membrane keyboard and on the pressing layer at corresponding lo...
02/03/2004
6491457Apparatus 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 operation. A second plurality of the keys is not coupled to electr...
12/10/2002
6285299Soft cover adapter for computer keyboard
A soft cover adapter for customizing and/or simplifying the use of a computer keyboard comprises an easily attachable soft cover made of cloth, vinyl, leather, or the like, configured in size and shape to cover a computer keyboard. The cover may be attach...
09/04/2001
6056458Computer keyboard with Z-axis input means
A computer keyboard with Z-axis input means is characterized in that at least one scrolling means compatible with that of a mouse, a cursor moving means and at least one mouse button are integrated on a keyboard with or without multimedia hotkeys. The nov...
05/02/2000
5988902Touchpad overlay with tactile response
A computer system includes a touchpad with one or more overlays providing the computer system with various input control functions. The overlay preferably includes tactile response elements to provide tactile feedback to the operator as an indication that...
11/23/1999
5887995Touchpad overlay with tactile response
A computer system includes a touchpad with one or more overlays providing the computer system with various input control functions. The overlay preferably includes tactile response elements to provide tactile feedback to the operator as an indication that...
03/30/1999
5432671Device forming tactile screen of the capacitive type
A device forming a touch screen of the capacitive type intended in particular to cower a visualizing screen of a visualizing display unit such as a cathode ray tube. A group of electrically conducting transparent electrodes are arranged to be insulated fr...
07/11/1995
5388922Miniature keyboard
A miniature keyboard assembly for generating code signals representative of selected characters and functions. The assembly including at least one but preferably, two glide keys, each coupled to a depressible keybutton for controlling the movement of its ...
02/14/1995
4924222Capacitive keyboard operable through a thick dielectric wall
A keyboard with capacitive keys is operable through a thick dielectric wall which may be integral therewith. The keyboard may be installed inside an agency or store and coupled to a micro-informatic system providing audiovisual information selected at the...
05/08/1990
4920343Capacitive keyswitch membrane with self contained sense-to-ground capacitance
A membrane capacitive keyboard of the type including a first flexible dielectric sheet and a second dielectric sheet having electrically conductive patterns thereon which form an array of capacitors and connecting matrices of drive and sense conductors. T...
04/24/1990
4876415Low cost keyboard with key tops defining surface of curved profile
A keyboard having a plurality of rows of depressable keys whose key tops define a surface of concave profile curved about an axis. The concave profile is achieved with key tops and key stems of identical configuration by maintaining a key holder plate whi...
10/24/1989
4680572Chord entry keying of data fields
A keyboard system for chord entry keying of alphanumeric data fields includes decoding logic permitting substantially or near-simultaneous depression of numeric or alpha data keys and entry or function keys. The logic provides a decoding algorithm for res...
07/14/1987
4528428Key-holding structure of keyboard with curved operating surface of keys
A keyboard assembly having key-switches, comprising a key holder plate supporting multiple keys in plural rows and movably across the thickness of the plate, and further comprising an upper casing which has a rectangular aperture closed by the key holder ...
07/09/1985
4475142Low profile keyboard switch
A capacitance keyboard switch is provided which reduces in a keyboard the overall space requirements therefore while providing at the same time the property of increasing the switch module force curve in the activating movement thereof. The tactile feel c...
10/02/1984
4439647Touchpad keyboard
An improved capacitive keyboard uses a standard printed circuit board provided in various locations with spaced conductor pairs. A conductive disc with a flat insulated lower surface is aligned above each conductor pair. All of the discs are suspended abo...
03/27/1984
4408252Low profile keyboard switch
A capacitance keyboard switch is provided which is of substantially reduced vertical dimensions for reducing in a keyboard the overall space requirements therefore. The switch of the invention has an overall height of only 0.750 inches (19.05 mm), and a l...
10/04/1983
4400758Capacitance switch arrangement
A capacitance-type membrane switch in which ordinarily spaced-apart contacts are positioned other than directly over an associated capacitance spacing element with an inner insulating layer and outer conductive portions....
08/23/1983
4394643Capacitive touch panel control
A capacitive touch panel control provided with first and second conductive circuit pads on opposite faces of a thin dielectric sheet in the form of a film secured to a dielectric panel by adhesive. The panel is provided with a touch pad. The circuit pads ...
07/19/1983
4305135Program controlled capacitive keyboard variable threshold sensing system
A sensing apparatus for detecting impedance changes in a variable impedance matrix keyboard. A microcomputer is utilized to control the basic key intersection scanning and for accurately calibrating and adjusting the sensing threshold of the sense amplifi...
12/08/1981
4288836Capacitance controlled keyswitch
A tri-state capacitance controlled keyswitch having a deformable concave electrode moveable by means of an actuator toward and away from a pair of capacitor plates underlying a dielectric layer in order to change the capacitive coupling between the capaci...
09/08/1981
4274752Keyboard multiple switch assembly
An electronic switch keyboard for typewriters or office machines includes a multiple switch at selected key positions to provide two signal inputs to a utilization device. A first capacitor switch is actuated to provide a first signal upon initial key dep...
06/23/1981
4163222Synchronous phase detected keyboard
For capacitance coupled keyboard data entry means, a key switch, synchronous circuitry and phase detector in combination to yield a unique encoder output signal for a keyboard matrix. Capacitance coupling is effected prior to full key switch travel, that ...
07/31/1979
4132487Keyboard switch
This invention relates to a keyboard switch or push button transducer for use in keyboards which makes use of the advantages of resistive and capacitive methods of closure. The switch element is comprised of a resilient conductive element attached to a pa...
01/02/1979
4039068Keyboard 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
3964594Keyboard of elastic material for office machines
In an office machine keyboard comprising a plurality of keys formed by an array of areas of layer of elastic material, each key is provided with an identifying character in relief on an insert. The insert is embedded in the elastic layer so that the chara...
06/22/1976
3931610Capacitive keyswitch sensor and method
Each of the inputs of an analog multiplexer are connected to a plurality of capacitive keyswitches and a reference capacitor. At the first multiplexer scan position, the reference capacitor is charged through a charging resistor and when a predetermined v...
01/06/1976
 
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