| Patent Number |
Title Of Patent |
Date Issued |
| 4947348 |
Densitometer method and system for identifying and analyzing printed targets |
August 7, 1990 |
| A hand-held battery operated densitometer for identifying and analyzing printed targets is provided which automatically determines whether an unprinted substrate, a solid black, a muddy magenta solid, an overprint, a solid color, or a halftone has been detected. Referenced density values |
| 4943760 |
Control systems for variable reluctance electrical machines |
July 24, 1990 |
| In a control system for a reluctance motor driving a load, the output of a reference waveform generator is applied to a power converter through a current controller. The output of the generator is determined by rotor position, as detected by a sensor. The generator establishes a relative |
| 4937637 |
Dual reading head transmission/reflection densitometer |
June 26, 1990 |
| A dual reading head transmission/reflection densitometer is disclosed which offers superior performance and reduced manufacturing costs. The invention employs two separate measuring heads, each containing their own collection optical system mounted in a single swing arm. Reflected or tra |
| 4935080 |
Protection and bonding of neodymium-boron-iron magnets used in the formation of magnet assemblie |
June 19, 1990 |
| A method of preparing corrosion resistant neodymium-boron-iron magnets is provided. The cleaned magnet is coated with zinc phosphate which neutralizes surface effects of contaminants and rinsed with chromic acid. A relatively large surface area having numerous mechanical interlocking |
| 4930201 |
Method for manufacturing a composite sleeve for an electric motor |
June 5, 1990 |
| 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 slid over the rotor hub. |
| 4927742 |
Multilayer printed wiring boards |
May 22, 1990 |
| A multilayer printed wiring board is described having (1) an inner layer conductive pattern on an organic insulating base material, (2) a poly(vinyl acetal)-phenolic resin coating containing an amine substituted organic zirconate or titanate coupling agent, (3) a dielectric insulating |
| 4926063 |
Square root digital-to-analog converter |
May 15, 1990 |
| A twenty four bit digital-to-analog converter comprising three eight bit digital-to-analog converters. The outputs of the two least significant converters are proportioned and summed together into one amplifier to form a sixteen bit converter. The most significant converter is fed to a |
| 4919752 |
Bath solution and process for the removal of lead/tim, lead or tin coatings from copper or nicke |
April 24, 1990 |
| The invention relates to a stripping solution for the removal of lead/tin, lead or tin coatings applied to copper or nickel surfaces. The caustic solution consists of nitric acid and contains one or several inhibitor(s) such as block copolymers of propylene oxide and ethylene oxide, or |
| 4912381 |
Adaptive control system |
March 27, 1990 |
| 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 can be controlled as a function of |
| 4908939 |
Method of making coaxial interconnection boards |
March 20, 1990 |
| 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 conductive layer forming a ground plane |
| 4908242 |
Method of consistently producing a copper deposit on a substrate by electroless deposition which |
March 13, 1990 |
| Electroless metal plating solutions are formulated and controlled to provide high quality metal deposits by establishing the intrinsic cathodic reaction rate of the solution less than 110% of the intrinsic anodic reaction rate. Methods are provided to formulate electroless copper pla |
| 4887465 |
Transducers for hostile environments |
December 19, 1989 |
| A screened inductance level transducer has a drive winding for setting up a drive field, and a sense winding in which voltage is induced in the presence of the drive field. A conductive screen, which may be of stainless steel, is mounted on a float for movement in response to liquid |
| 4880512 |
Pulsed light selective photolysis process for treatment of biological media and products made th |
November 14, 1989 |
| A novel irradiation process and products made thereby. The process treats biological media such as blood fractions, genetically engineered protein products and vaccine preparations. The process photolyzes nucleic acids in preference to proteins in the media, e.g., it inactivates DNA- or |
| 4868468 |
Screened inductance sensors for brushless d.c. motors |
September 19, 1989 |
| In a screened inductance sensor for a brushless d.c. motor, a sensor rotor carrying conductive screens is mounted on an extension of the motor shaft. A single solenoidal drive winding on a stator of the sensor establishes a drive field, when energized, which induces a voltage in a sense |
| 4820961 |
Linear motion screened inductance sensors |
April 11, 1989 |
| In a screened inductance sensor system having a drive winding energizable to set up an alternating magnetic drive field, a sense winding links the drive field and a screening element modulates the spatial distribution of the drive field, when in the vicinity of the sense winding. Variati |
| 4814197 |
Control of electroless plating baths |
March 21, 1989 |
| Methods of analyzing and controlling an electroless plating solution are described which provide for real time control of the electroless plating solution, e.g., an electroless copper bath whose main constituents are copper sulfate, complexing agent, formaldehyde, a hydroxide and a s |
| 4804575 |
Multilayer printed wiring boards |
February 14, 1989 |
| A multilayer printed wiring board is described having (1) an inner layer conductive pattern on an organic insulating base material, (2) a poly(vinyl acetal)-phenolic resin coating containing an amine substituted organic zirconate or titanate coupling agent, (3) a dielectric insulating |
| 4795254 |
Durable working matte/glossy color standard and method of making same |
January 3, 1989 |
| A color reference standard and method of making same are disclosed. A transparent film having a matte surface and a spectral optical modulator are selected. The spectral optical modulator, preferably a glossy pigment, is coated onto the film surface opposite the matte surface, as by |
| 4774279 |
Adherent coating for copper |
September 27, 1988 |
| A primer coating composition suitable for coating the inner layers of multilayer boards is disclosed. The cured coating is capable of maintaining adhesion without outgassing for at least 10 seconds at 250.degree. C. It can be adhesion promoted for adherent electroless metal depositio |
| 4770530 |
Remote spectrophotometer |
September 13, 1988 |
| A spectrophotometer (10) is provided having the capability to accurately measure spectral reflectance at relatively long sample distances. A first illumination optics arrangement (14) assures uniform illumination to a portion of the sample and a second optical arrangement (20) focuses th |
| 4770067 |
Method of manufacturing surgical cutting tools for thermally aided surgery |
September 13, 1988 |
| A method of manufacturing a surgical cutting blade having a heating element mounted on the sides thereof which is capable of supplying sufficient thermal energy to cauterize incised tissue and reduce hermorraging of blood vessels at the site of the incision. According to the method, a |
| 4764671 |
Fiber optic fluid sensor using coated sensor tip |
August 16, 1988 |
| An optical fluid sensing apparatus comprising a sensing tip having a conical configuration with a coating, such as a thin layer of polytetrafluoroethylene (PTFE), on the outer surface of the tip element itself. At the sensing tip, emitted light is either refracted back into a detecto |
| 4762992 |
Error detection system for two-state fiber optic sensors |
August 9, 1988 |
| An error detection system is provided for a two-state fiber optic sensor. An amplified photodetector signal is sampled by each of an ON-OFF threshold detector, a disconnect threshold detector and a slope detector. The ON-OFF threshold detector monitors whether the detector signal is |
| 4751105 |
Method for producing circuit boards |
June 14, 1988 |
| A method for producing circuit boards in which a plurality of planar circuit board bases having a circuit pattern thereon are interconnected at predetermined points. The method includes the steps of applying a mask over the circuit pattern on a base leaving, at the points to be inter |
| 4748056 |
Process and composition for sensitizing articles for metallization |
May 31, 1988 |
| Non-metallic articles are sensitized for deposition of adherent metal from electroless metal solutions in contact therewith by treatment with a first medium including a compound or combination of compounds containing an element which in one of its states is catalytically active to electr |
| 4701352 |
Surface preparation of ceramic substrates for metallization |
October 20, 1987 |
| A process for preparing a ceramic substrate for metallization wherein a surface of the ceramic substrate is contacted with a composition containing one or more alkali metal compounds, preferably in the form of solid pellets. The pellets are melted on the ceramic surface. As the pelle |
| 4671465 |
Method and apparatus for winding slotted armatures |
June 9, 1987 |
| An automatic armature winding machine that is capable of winding straight and skewed stack armatures of various diameters and lengths and of achieving high percentages of slotfill is disclosed. A transfer plate for directing a plurality of wires for winding the core of the armature to a |
| 4279507 |
Spatial scanning means for a photometer |
July 21, 1981 |
| A scanning device adapted to be associated with a radiant energy measuring meter such as a luminance photometer to provide precision linear or angular scanning across an area of an object or a subject being measured without relative movement of the meter or subject. A scanning device whi |
| 4189211 |
Wide angle telecentric projection lens assembly |
February 19, 1980 |
| A wide angle telecentric projection lens system, having a long back focal distance, includes a front lens doublet, comprising negative and positive meniscus lens elements, located in front of an aperture stop, and a rear lens group on the other side of the aperture stop, the rear group |
| 4097152 |
Spectrophotometer with visual spectrum display |
June 27, 1978 |
| An electro-optical device which measures the transmittance of a sample at any desired visible wavelength and simultaneously displays the visual transmittance spectrum of the sample. |
| 4022534 |
Reflectometer optical system |
May 10, 1977 |
| A reflectometer optical system having an optical axis for illuminating a sample with flux derived from an extended source such as a pulsed xenon flashtube. A wedge-shaped diffuser, symmetric with respect to the optical axis, is used to diffuse the flux emanating from the source and refra |
| 4017148 |
Tri-power periscope head assembly |
April 12, 1977 |
| A tri-power periscope head assembly utilizing three modular optical assemblies comprised of a highly corrected Petzval type objective lens and first and second Galilean telescope assemblies, each of which is adapted to be simply and readily reversible. In one preferred embodiment, the |
| 3991331 |
Commutating structure for DC machines |
November 9, 1976 |
| A DC permanent magnet machine having stator and rotor assemblies of the "inside out" design. The stator is provided with a plurality of electrically energizable poles having windings which are electrically coupled to associated commutator bars forming an annular array. The rotor is p |
| 3979821 |
Method of manufacturing rare earth permanent magnet rotor |
September 14, 1976 |
| A rotor containing rare earth magnet material which can be assembled, machined and then magnetized. A stack of laminations is built up, pieces of virgin rare earth magnet material are inserted in the slots provided therefor in the laminations, the laminations with the rare earth magnet |
| 3956041 |
Transfer coating process for manufacture of printing circuits |
May 11, 1976 |
| There is provided a process for producing resin rich surfaces of desired and specified thickness and physical, chemical, electrical and/or optical properties involving the use of a transfer base material to move a viscous, liquid, hardenable composition after partial hardening into a |
| 3937993 |
Commutating structure for DC machines |
February 10, 1976 |
| A DC permanent magnet machine having stator and rotor assemblies of the "inside out" design. The stator is provided with a plurality of electrically energizable poles having windings which are electrically coupled to associated commutator bars forming an annular array. The rotor is p |
| 3935521 |
Displacing apparatus |
January 27, 1976 |
| Apparatus for advancing magnetic tape with respect to a recording head through small, discrete, and uniform displacement increments. A direct current drive motor has an armature shaft that drives a displaceable member. Controls develop signals that energize and deenergize the motor. |
