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| Number | Title | Issue Date |
| 4293764 | Control console In exemplary embodiments, operation of microswitches is to be made possible with sterile operating gloves in the operating room. To this end, the disclosure provides that the cover plate be covered with a continuous stiff plastic sheet. The latter plastic... | 10/06/1981 |
| 4289943 | Push-button switches Different from conventional push-button switches with which an electric circuit is closed and opened as the button top is pushed with a finger tip and as the finger tip is withdrawn from the button top, respectively, the inventive push-button switch opera... | 09/15/1981 |
| 4286129 | Keyboard having sudden trip tactile effect keys The invention relates to a keyboard having sudden trip tactile effect keys. Such a keyboard comprises a flexible and conducting foil stamped with protuberances, each of them having a central upper flat part, with an area less than the area of the base of the p... | 08/25/1981 |
| 4254309 | Snap-through characteristic keyboard switch A keyboard switch actuating element having a concave central portion and a lip located at the periphery of the actuating element for providing a snap-through characteristic when the actuating element is disposed even over a smooth surface and the actuatin... | 03/03/1981 |
| 4245138 | Tactile element and keyboard including the tactile element A tactile snap-action element for use in keyboards, the element comprising an arcuately shaped invertible dome defining a first contour and a dome actuating protrusion defining a second contour, the protrusion being integral with the dome and being non-in... | 01/13/1981 |
| 4195210 | Switching assemblies A switching assembly includes an insulative substrate upon which is carried a plurality of conductive paths respective portions of which are selectively bridged upon depression of a resilient conductive contact element. That contact element is generally i... | 03/25/1980 |
| 4190748 | Keyboard switch assembly A keyboard assembly and a keyboard switch are presented in which the keyboard switch is a layer of flexible insulating material with circuit configurations thereon and an array of flat topped protrusions which serve as key switches to effect a snap action... | 02/26/1980 |
| 4127758 | Tactile layer having hinged dome A tactile layer for use in combination with diaphragm-type switch keyboards to impact a tactile signal to the user upon depression of a key. The tactile layer comprises a sheet of Mylar polyester material having integrally formed deformations therein wher... | 11/28/1978 |
| 4085306 | Keyboard switch 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. Each contact eleme... | 04/18/1978 |
| 4060703 | Keyboard switch assembly with tactile feedback having illuminated laminated layers including opaque or transparent conductive layer A sandwich type computer keyboard with keys characterized by a tactility to provide a positive degree of tactile feedback to an operator and having an electroluminescent panel for illuminating the keyboard panel.... | 11/29/1977 |
| 3995126 | Membrane keyboard apparatus Membrane keyboard apparatus is disclosed including an insulator having a conductive sheet thereon providing a plurality of first electrode members in the form of an array of apertures, and a plurality of second electrode members located concentrically wit... | 11/30/1976 |
| 3988551 | Membrane keyboard apparatus having common apertured electrode, aperture inserted electrodes and conductive bubble contactors Membrane keyboard apparatus is disclosed as including an insulator having a conductive sheet thereon providing a plurality of first electrode members and a plurality of second electrode members to form an array of individual switching units. A membrane me... | 10/26/1976 |
| 3973091 | Pushbutton keyboard assembly having pole and inner contacts simultaneously engaged by a bridging contact A keyboard system for an electronic pocket calculator, remote TV tuner or the like comprises a substrate board having a generally flat surface with a network of circuit paths thereon. The board is provided with switch contacts at a plurality of switching ... | 08/03/1976 |
| 3967084 | Keyboard switch assemblies having two foot support legs on dome-shaped contact member 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... | 06/29/1976 |
| 3964594 | Keyboard 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 |
| 3932722 | Push button body for a push-button switch providing snap-action of the switch A push button of rubber or other resilient material for use with a push-button switch and comprising a hollow tilting wall of a mesa shape. The tilting wall of the resilient push button serving as an operating portion is constructed such that its thicknes... | 01/13/1976 |
