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| Number | Title | Issue Date |
| 5173651 | Electrical drive systems A direct current brushless electric motor has a rotor, and a stator with inwardly extending teeth, between each pair of which a winding slot is defined. The radially inward face of each tooth has a dummy slot shaped so the reluctance forces between rotor ... | 12/22/1992 |
| 4859807 | Wire scribed circuit boards and method of manufacture This invention relates to interconnection circuit boards and processes for making and modifying interconnection circuit boards wherein adhesive is applied to a wire used in scribing a conductor pattern. The adhesive is activated to a tacky state during th... | 08/22/1989 |
| 4853604 | Position and speed sensors In a sensor having a drive winding for establishing a forward field, an electrically conductive screen is displaceable relative to a sense winding. In the presence of the drive field, eddy currents are generated in the screen to establish a counter-field ... | 08/01/1989 |
| 4837129 | Process for producing conductor patterns on three dimensional articles An article comprised of a body having a conductor pattern on at least one non-planar and non-flexible surface thereof. The article is prepared by using a three-dimensional mask having an interior surface which is a mirror image replica of the surface of t... | 06/06/1989 |
| 4818322 | Method for scribing conductors via laser This invention relates to a method of using laser energy for bonding and stripping conductors during the scribing operation. The method provides and directs discrete laser beam pulses of substantially the same energy content at a rate which continuously v... | 04/04/1989 |
| 4797592 | Dynamo electric machine with upwardly shifted ripple frequency A rotary electric dynamo machine in which the ripple component in the output occurs at a higher frequency. One half of the pole faces have a nonuniform airgap while the other half have a uniform air gap and cover a noninteger slot distance. The armature h... | 01/10/1989 |
| 4782272 | Electrical drive systems A direct current brushless electric motor has a rotor, and a stator with inwardly extending teeth, between each pair of which a winding slot is defined. The radially inward face of each tooth has a dummy slot shaped so the reluctance forces between rotor ... | 11/01/1988 |
| 4770788 | Process for removing metal complexes from waste solutions This invention relates to a process for treating waste solutions and rinse waters, especially those from electroless plating processes to remove organometallic complexes and complexing agents, particularly copper and copper-EDTA complexes by eluting the w... | 09/13/1988 |
| 4763057 | Control for improving induction transient response by excitation angle control A variable frequency AC induction motor servo control system wherein slip is momentarily increased in response to error signal transients. In a preferred embodiment, a phase shift is introduced in the energizing stator current as the servo velocity error ... | 08/09/1988 |
| 4763056 | Power supply systems for reluctance motors In a power supply system for a variable reluctance motor, each phase winding of the motor is connectible across a pair of supply rails by first and second switch means located respectively between the first supply rail and the winding and between the wind... | 08/09/1988 |
| 4750092 | Interconnection package suitable for electronic devices and methods for producing same An interconnecting package for attaching electronic devices, such as semiconductor chips, to an interconnection board and processes for the production and mounting thereof. The interconnection package comprises a multiplicity of metallic leads or pins ali... | 06/07/1988 |
| 4743710 | Coaxial interconnection boards In making coaxial interconnection boards according to this invention coaxial conductors are scribed onto a circuit board substrate. The coaxial conductors are preformed and affixed in a predetermined pattern on the substrate using an adhesive. A conductiv... | 05/10/1988 |
| 4733149 | Adaptive control system A real time adaptive control capable of maintaining stable operation with changing inertia. The controller utilizes a pseudo-derivative feedback (PDF) type control wherein dynamic adjustment is achieved by adjusting only a single variable. The variable ca... | 03/22/1988 |
| 4729160 | Method for manufacturing a composite sleeve for an electric motor In an electric motor having a plurality of magnets bonded to a rotor hub, a composite sleeve is disposed over the rotor hub and magnets. The composite sleeve may be wound directly upon the rotor hub, or the composite sleeve may be wound upon a mandrel and... | 03/08/1988 |
| 4711026 | Method of making wires scribed circuit boards This invention relates to interconnection circuit boards and processes for making and modifying interconnection circuit boards wherein adhesive is applied to a wire used in scribing a conductor pattern. The adhesive is activated to a tacky state during th... | 12/08/1987 |
| 4712005 | Floating mask encoder with assembly spacer In an optical shaft encoder for converting rotary motion to an electrical signal, a shaft is rotatably mounted in a base and has a code disk attached thereto. A light source and photodetector are disposed on opposite sides of the code disk. The photodetec... | 12/08/1987 |
| 4706206 | Color printing control using halftone control areas In a multi-color printing process, measurements of the optical density of two different three-color halftone control areas are used to calculate dot gain and solid density of the cyan, magenta and yellow images. Since no single-color solid control targets... | 11/10/1987 |
| 4703243 | Stepping motor harmonic suppression A stepping motor including a plurality of stator poles wherein the stator poles are non-symmetrically displaced from their normal position to reduce harmonics in the torque/displacement crossing of the motor.... | 10/27/1987 |
| 4698537 | Electrical drive systems incorporating variable reluctance motors In a two-phase salient pole variable reluctance motor in which the number of stator poles is four or a multiple of four, alternate stator poles carry windings of different phases and each stator pole has an elongated pole shoe, so that the pole tips of ea... | 10/06/1987 |
| 4693778 | Apparatus for making scribed circuit boards and circuit board modifications This invention relates to an apparatus for making circuit boards in which insulated conductors are applied and bonded to a nonconductive surface to form a conductive path between contact points thereon in a predetermined precise pattern.... | 09/15/1987 |
| 4686437 | Electromechanical energy conversion system An electromechanical energy conversion system comprising a brushless motor and a stored program controller for controlling motor operation in a plurality of modes in accordance with internally generated and/or external commands.... | 08/11/1987 |
| 4683036 | Method for electroplating non-metallic surfaces Method for electroplating non-metallic surfaces on a substrate, e.g. of plating holes in metal clad laminates, is disclosed. Metallic sites are formed on the surface and the resulting site-containing surface is electroplated by means of an electroplating ... | 07/28/1987 |
| 4682093 | Power supply systems for inductive elements In a power supply system, an inductance L is connected between a rail at a voltage V1 and a rail at earth through a switch S. When the switch is opened, a current i2 flowing from the inductance L is directed to a third rail through a... | 07/21/1987 |
| 4679313 | Method of making a servo motor with high energy product magnets A method of making an electric motor with the stator winding inside a slotless cylindrical stator shell.... | 07/14/1987 |
| 4679321 | Method for making coaxial interconnection boards An interconnection board for high frequency signals is made by wire scribing coaxial conductors. The board is provided with holes. The coaxial conductors with signal conductor surrounded by a dielectric in turn surrounded by a conductive shield are wire s... | 07/14/1987 |
| 4677298 | Method of monitoring ink-water balance on a lithographic printing press In a lithographic printing system, a light source and a plurality of photodetectors are used to monitor the amount of fountain solution interacting with the ink. The light source irradiates an ink form roller and the photodetectors are disposed at a specu... | 06/30/1987 |
| 4675547 | High power transistor base drive circuit In a base drive circuit for a high power transistor, an external signal is applied to the circuit by an optical coupler. In response to the external signal, the circuit provides a positive current to the high power transistor in order turn it on. The posi... | 06/23/1987 |
| 4672007 | Electrodeposition composition and process for providing a Zn/Si/P coating on metal substrates The present invention provides an aqueous composition and process for the electrodeposition of a layer of zinc containing silicon and phosphorus on a metal substrate. The electrodeposition composition is prepared by reacting metallic silicon and zinc with... | 06/09/1987 |
| 4670696 | Variable speed variable reluctance electrical machines A drive system includes a reluctance motor, driving a load. The motor has stator and rotor poles and magnetizing windings for each stator pole. The airgap is small so that saturation occurs during pole overlap, and the poles are constructed so that there ... | 06/02/1987 |
| 4668532 | System for selective metallization of electronic interconnection boards An improved process for selective metallization of insulating substrates, as for example in the manufacture of wire scribed interconnection boards, is provided. The substrates optionally include one or more holes or cavities for electrical connections. Th... | 05/26/1987 |
| 4666744 | Process for avoiding blister formation in electroless metallization of ceramic substrates A process for avoiding blister formation between a metal layer which is electrolessly deposited on a surface of a ceramic substrate and the substrate. The substrate is adhesion promoted with an alkali metal composition containing between 0.35 and 0.9 mole... | 05/19/1987 |
| 4662944 | Process and composition for sensitizing articles for metallization Non-metallic articles are sensitized for deposition of adherent metal from electroless metal solutions in contact therewith by treatment with a first medium including cuprous ions and stannous ions thereby absorbing on the surface in situ at least said cu... | 05/05/1987 |
| 4661756 | Servomotor control systems In a servo control system for a reluctance motor, the output of a reference waveform generator is applied to a power converter through a current controller. Under standstill conditions, at least two of the motor windings are energised so that both forward... | 04/28/1987 |
| 4647477 | Surface preparation of ceramic substrates for metallization A process for preparing a ceramic substrate for metallization wherein a surface of the ceramic substrate is contacted with an admixture comprised of an inert solid material and a composition containing one or more alkali metal compounds. The admixture and... | 03/03/1987 |
| 4647824 | Output voltage control for a DC servo amplifier In a system having a plurality of electric motors which are rated at different voltages, a voltage control circuit enables the electric motors to be connected to a common power supply. The voltage control circuit determines a first voltage appearing betwe... | 03/03/1987 |
| 4646436 | Shielded interconnection boards Discloses a method for making a coaxial conductor interconnection circuit board, as well as the board per se, by providing a first conductive coating on a substrate, scribing an insulated wire signal conductor pattern on the first coating and a second con... | 03/03/1987 |
| 4645997 | Transient free solid state automatic power factor correction In an apparatus for controlling the power factor of a power distribution system connected to inductive loads, banks of delta connected capacitors are added to or removed from the power lines of the power distribution system by a plurality of solid state s... | 02/24/1987 |
| 4644199 | Linear DC permanent magnet motor A linear DC permanent magnet motor comprising a wound member having a plurality of windings wound on a slotted magnetic structure and a field member movable relative to said wound member, the field comprising permanent magnet means for developing a magnet... | 02/17/1987 |
| 4642321 | Heat activatable adhesive for wire scribed circuits A non-blocking, solid, adhesive composition comprising, (a) a film forming polymeric resin of average molecular weight between 10,000 and about 100,000 and having an epoxide, hydroxyl or unsaturated functionality greater than about 2, the polymeric resin ... | 02/10/1987 |
| 4641773 | Ultrasonic stylus position stabilizer In a positioning guide for an ultrasonic stylus disposed in a scribing head, a hub surrounds the stylus and is secured to the stylus near its working tip. A surrounding retainer is secured to the housing of the moveable scribing head. Radial spokes secure... | 02/10/1987 |
