Class 361/291 - Compression type

Subclass of Class 361 - Electricity: electrical systems and devices
Definition: Subject matter which is varied by means to squeeze at least
No. of patents: 34
Last issue date: 03/18/2008

Number	Title	Issue Date
7345866	Continuously tunable RF MEMS capacitor with ultra-wide tuning range A method is provided of continuously varying the capacitance of a MEMS varactor having a cantilever assembly mounted on a base portion, the cantilever assembly having a first capacitance plate and a dielectric element mounted thereon, and the base portion having a s...	03/18/2008
7176390	Capacitive load cell with multi-layer dielectric for extended range A capacitive load cell includes upper and lower capacitor plates and an intermediate dielectric comprising two or more layers of compressible material with diverse compressibility characteristics. The most easily compressed dielectric layer provides sensitivity to l...	02/13/2007
7140102	Electrode sandwich separation Materials bonded together are separated using electrical current, thermal stresses, mechanical force, any combination of the above methods, or any other application or removal of energy until the bonds disappear and the materials are separated. In one embodiment the...	11/28/2006
7088567	Tunable capacitors using fluid dielectrics Capacitors (10,20,40,50,70,80) having a fluid dielectric material that is transported or undergoes a phase change are disclosed. The dielectric medium change results in a change in the total dielectric constant of the material between the electrodes (12, 1...	08/08/2006
7082024	Component comprising a variable capacitor A variable capacitor having a groove portion formed in an insulating substrate, two upper portions of the substrate located on either side of the groove portion forming two lateral edges, a conductive layer covering the inside of the groove portion, a flexible condu...	07/25/2006
7062055	Elastomeric dielectric polymer film sonic actuator A sonic actuator including a multi-layer membrane having a non-metallic elastomeric dielectric polymer layer with a first surface and a second surface, a first compliant electrode layer contacting the first surface of the polymer layer, and a second compliant electr...	06/13/2006
6995890	Interference display unit An interference display unit with a first electrode, a second electrode and posts located between the two electrodes is provided. The characteristic of the interference display unit is that the second electrode's stress is released through a thermal process. The pos...	02/07/2006
6975498	Variable capacitor A variable capacitor includes a stator and a rotor rotatably supported by a cover relative to the stator. The stator includes a first stator electrode of two or more layers and a second stator electrode of two or more layers in the interior of a dielectric substrate...	12/13/2005
6937456	Direct digitally tunable microwave oscillators and filters A tunable element in the microwave frequency range is described that may include one or more tunable elements that are directly digitally controlled by a digital bus connecting a digital control circuit to each controlled element. In particular, each digital signal ...	08/30/2005
6891711	Ultra-miniature, high temperature, capacitive inductive pressure transducer An ultra miniature high temperature capacitive inductive pressure transducer is fabricated by MEMS techniques. The transducer consists of two separated pieces of silicon which form the plates of the capacitor, one of which plate is micromachined in such a way to all...	05/10/2005
6597560	Micro-electro-mechanical varactor and a method of making and using thereof A varactor includes a first capacitor plate, a second capacitor plate, at least one fixed charge holder, and a control electrode. The second capacitor plate is spaced from and movable towards and away from the first capacitor plate. At least one fixed cha...	07/22/2003
6473290	Capacitance-type external-force detecting device with improved sensitivity A capacitance-type external-force detecting device includes a substrate, a moveable unit which is supported by the substrate via a supporting beam and which can be displaced in the detecting direction, a comb-shaped fixed electrode provided on the substra...	10/29/2002
6377438	Hybrid microelectromechanical system tunable capacitor and associated fabrication methods A microelectromechanical system (MEMS) tunable capacitor having low loss and a corresponding high Q is provided. The tunable capacitor includes a first substrate having a first capacitor plate disposed thereon. A fixed pivot structure is disposed on the f...	04/23/2002
6033370	Capacitative sensor A capacitive force sensor which has a plurality of layers forming a force sensing detector, the detector providing a signal in response to pressure, feedback output in response to the signal from the force sensing detector and a housing for encompassing t...	03/07/2000
5923522	Capacitive switch with elastomeric membrane actuator A capacitive switch assembly includes an elastomeric sheet actuator for elastically supporting a switching member above a capacitive element comprised of a pair of conductive plates and a dielectric sheet. The elastomeric sheet supports the switching memb...	07/13/1999
5892652	Sensitive key device having a detective surface in direct contact with a plate This invention concerns a sensitive key device with capacitive effect working through an electrically insulating plate, the key being supported by a printed circuit board. According to the invention, the bottom of a single part having a spring blade made ...	04/06/1999
5662123	Capacitive biofeedback sensor with resilient polyurethane dielectric for rehabilitation A capacitive biofeedback sensor including a polyurethane dielectric sandwiched between two wire mesh or carbon impregnated silicone rubber conductors. The sensor is placed within a patient's shoe, boot, ankle, brace, crutch, hand grip, wheelchair, etc., a...	09/02/1997
5644349	Mechanical capacitor A mechanical capacitor includes a fixed electrode, a movable electrode separated from the fixed electrode by a gap, a spring attached to the movable electrode suspending it above the fixed electrode, opposing the fixed electrode and an insulator formed ov...	07/01/1997
5597984	Capacitance weighing mat with substantially rigid separators A capacitance mat for use in measuring loads includes a number of substantially horizontal electrode plates (of high strength aluminum) forming a capacitor with a substantially rigid dielectric material (e.g. nylon or fiberglass) separator disposed betwee...	01/28/1997
5449002	Capacitive biofeedback sensor with resilient polyurethane dielectric for rehabilitation a capacitive biofeedback sensor including a polyurethane dielectric sandwiched between two wire mesh or carbon impregnated silicone rubber conductors. The sensor is placed within a patient's shoe, boot, ankle, brace, crutch, hand rip, wheelchair, etc., an...	09/12/1995
5166812	Fax machine with retractable drawer A modular fax machine including a document feeder for feeding documents to a scanner, a control panel for operator input of selectable fax machine parameters, a drawer for supporting the document feeder and the control panel, and a housing for extensibly ...	11/24/1992
5159316	Capacitance change article removal alarm An object to be protected is placed on a compressible pad having upper and lower conductive plates, separated by a compressible dielectric. A sensing device is connected to the upper and lower plates to sense a first capacitance when the upper plate is co...	10/27/1992
4852443	Capacitive pressure-sensing method and apparatus A novel capacitive pressure-sensitive sensing technique and apparatus wherein an elastomeric conductive electrode carrying a two-dimensional array of projections is pressure-deformed against a fixed coextensive cooperative electrode to generate signals, s...	08/01/1989
4836033	Capacitive measuring assembly for determining forces and pressures A capacitive measuring assembly for determining forces and/or pressures includes at least three plane parallel capacitor surfaces with intercalation of a dielectric therebetween. The capacitor surfaces being movable relative to each other against elastic ...	06/06/1989
4617608	Variable gap device and method of manufacture A variable gap device which comprises a suitable material with a cavity formed therein mounted over a body. Elements are formed on the surface of the body and on the top surface of the cavity. In one embodiment, the elements are electrodes of a variable c...	10/14/1986
4568895	Capacitor arrangements, especially for an electronically tunable band pass filter A capacitor arrangement which is especially suited for use in an electronically tunable narrow band tuned cavity filter includes two capacitor plate portions which are juxtaposed one another to form a capacitor. One of the capacitor plate portions may be ...	02/04/1986
4386386	Capacitor type sensor for detecting displacement or load A capacitor type displacement or load sensor includes a first electrode constituted by an electrically conductive coiled spring capable of expansion and contraction and a second electrode positioned to face the first electrode without making contact there...	05/31/1983
4381788	Method and apparatus for detecting apnea An apnea monitor having a capacitance type transducer pad providing a signal indicative of respiration. The resilient dielectric material between the capacitor plates is formed in two layers with the upper layer having a lesser spring constant to make the...	05/03/1983
4369483	Trimmer capacitor A trimmer capacitor includes two spaced electrodes having a dielectric layer therebetween. One of the electrodes includes a resilient central portion formed into a bulbous shape and engaged by a pressing plate threadedly receiving a screw shaft. The screw...	01/18/1983
4273204	Capacitive force load cell for weighing scale A weight scale includes a capacitive force load cell for linearly transducing force into electrical capacity. A C-shaped spring supports two capacitor plates adjacent the distal ends of the arms with the surfaces of the plates being normally parallel. Wei...	06/16/1981
4102422	Device for measuring loads, especially transient loads A device comprises for sensing or measuring loads, especially transient loads, such as a load imposed by a wheel of a vehicle driving over the device. The device comprises two electrically conductive plates and an intermediate dielectric and elastomeric o...	07/25/1978
4016466	Subminiaturized adjustable capacitor A variable capacitor has an elastic conductive electrode. The elastic conductive electrode is capable of reversible deformation to vary the capacitance. The deformation is applied by a screwable adjuster device....	04/05/1977
3943417	Compression trimmer A compression trimmer for providing a range of capacitance values for an electrical circuit includes a plurality of capacitive plates spaced by one or more dielectric members and mounted on a substantially compliant, high temperature, molded plastic insul...	03/09/1976

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Class 361/291 - Compression type