Abstract:
In a pressure sensor, a first contact electrode is formed on a base board. A second contact electrode is formed on the base board such that a top face thereof is made flush with a top face of the first contact electrode. A deformable click rubber has a flat bottom face opposed to the first and second contact electrodes. The flat bottom face is in parallel with the top faces of the first and second contact electrodes. The sensor generates an output signal when the click rubber is brought into contact with the first contact electrode. A contact area between a bottom portion of the click rubber and the second contact electrode varies in accordance with the deformation of the click rubber to vary an amplitude of the output signal.
Abstract:
A switch assembly includes a plurality of electrical devices and a plurality of user activated switches. The plurality of electrical devices each include a control terminal. Each of the electrical devices causes a different distinguishable output to be provided when a control signal is asserted on the control terminal of one of the plurality of electrical devices. The plurality of user activated switches include carbon-coated contacts. Each of the user activated switches when asserted provides the control signal to the control terminal of one of the plurality of electrical devices.
Abstract:
An improved electrode for use in displays, including those of the touchscreen type, has a conductive polymeric material disposed over the electrode material at those regions where the electrode is subject to flexing in use, thereby putting the electrode material at risk of cracking. The conductive polymeric material bridges any cracks which may develop, thus providing electrical continuity.
Abstract:
A thermally curable conductive polymer thick film composition comprising, by weight:(a) about 3-15 parts of at least one thermoplastic vinyl acetate/vinyl chloride/dicarboxylic acid multipolymer resin;(b) a second thermoplastic resin selected from the group consisting of:(i) about 1-6 parts of at least one thermoplastic polyurethane resin;(ii) about 2-10 parts of at least one thermoplastic polyurethane resin;(iii) about 1-10 parts of a mixture of at least one thermoplastic polyurethane and at least one thermoplastic polyester resin;(c) about 0.05-1 parts of a tertiary amine;(d) an effective amount of at least one organic solvent capable of substantially dissolving (a), (b), and (c) ingredients; and(e) about 50-80 parts of silver flake.
Abstract:
The invention provides a novel electroconductive rubbery member which is a shaped body of a conductive rubbery elastomer impregnated with a powdery conductive particulate material such as carbon black or a metal powder dispersed in an insulating rubber, in which a multiplicity of conductive fibrous bodies such as carbon fibers or very thin metal wires are embedded in such oriented dispersion that each of the fibrous bodies lies along a line which intersects the surface of the shaped body and at least a part of the fibrous bodies are protruded out of the surface of the shaped body. By virtue of the protruded fibrous bodies, very reliable electric conduction is obtained between the conductive rubbery member and the metal electrode in contact therewith. Further advantages are obtained by providing an insulating coating film of, preferably, an adhesive on the contacting surface of the conductive rubbery member penetrated by the protruded conductive fibrous bodies. The inventive conductive rubbery members are also useful as the conductive parts of an elastic connector having an alternately stratified structure of conductive rubbery strata and insulating rubbery strata.
Abstract:
A pushbutton switch has a plurality of pushbuttons and corresponding switch contacts. The switch contacts are formed conductive patterns printed on an insulation plate or sheet and are in contact with a pressure conductive rubber sheet. The pressure conductive rubber sheet includes conductive powder and is rendered conductive when compressed by the pushbutton, so that the corresponding switch contacts are closed by the conductive rubber sheet. A plurality of pairs of switch contacts are connected to terminals which are arranged in an adjacent relation.
Abstract:
A pressure sensitive switch and circuit breaker comprising a body formed of a resilient, deformable inorganic insulating material such as silicone rubber having dispersed therethrough, including its outer surface, a quantity of electrically conductive discrete metal particles. The particles are so oriented in the body of insulating material when the latter is in its normal, unstressed condition that the body is non-conductive, but the particles are movable relatively to one another in response to the application of a compressive force on the body so as to effect engagement of a sufficient number of particles to establish a conductive path through the body. The resilience of the body material enables it to return to its normal condition following release of the compressive force, thereby effecting relative movement of the particles out of engagement with one another and restoring the body to its non-conductive state. Should the switch be subjected to an overload current the engaged particles may be consumed, thereby rendering the switch non-conductive and protecting the other parts of the circuit. Upon correction of the cause of the overload the switch once again may be rendered conductive by subjecting it to compressive force.
Abstract:
An external operation device for electronic timepieces having a switch unit made up of an array of a plurality of electric switches is inserted in an external member of a timepiece and said electric switches being electrically connected to an internal module.
Abstract:
A keyboard device utilizing a conductive plastic material layer which contacts circuit elements or pathways, the improvement of snapable plastic means raised on a pedestal through which it snaps through center to provide a feel of completion of circuit contact to the user.
Abstract:
In a push-button switch using an elastic and electrically conductive contact member movable into and out of engagement with adjacent but separated conductive paths on a substrate, the conductive paths are in the form of helices fitting within one another and the engaging surface of the contact member is provided with a series of lands arranged in a plurality of Lshaped patterns.