| Patent Number |
Title Of Patent |
Date Issued |
| 5779907 |
Magnetic microplate separator |
July 14, 1998 |
| An apparatus for immunoassay using a 96-well microplate includes a mechanism for supporting the microplate in a relatively fixed position, a magnetic microplate assembly containing multiple cylindrical magnets positioned in 4.times.6 arrays for insertion from the bottom of the microp |
| 5381337 |
No skid brake control |
January 10, 1995 |
| The present invention is a brake control system for preventing the skidding of a wheel on a surface. The phase relationship between the brake pressure applied to the brakes and the torque created from the braking applied is determined. This relationship allows the present brake control s |
| 5291136 |
Variable angle eddy current probe |
March 1, 1994 |
| An eddy current probe for nondestructive testing, having a rotatable shoe that holds the eddy current coil. The probe is attached to an arm of automated eddy current test equipment, and has a coil-containing shoe that may be rotated to a desired angle with respect to the surface to be |
| 5276450 |
Phase coherent heterodyne anti-jam method and apparatus |
January 4, 1994 |
| Method and apparatus for reducing the effects of noise jamming on coherent frequency or phase modulated signals employs a two channel radio signal processing system (15, 20) which accepts an input signal containing a desired signal (S) and a jamming signal (J) from a receiver input circu |
| 5111142 |
Eddy current proble with adjustable position rotating head |
May 5, 1992 |
| A detachable, articulated rotating eddy current inspection tool includes a body member having a connector at one end for mechanically and electrically attaching the body member to a rotating drive member while at the other an eddy current probe is supported for radial movement with r |
| 5059904 |
Control circuit for variable characteristic rotating eddy current probe |
October 22, 1991 |
| A detachable, articulated rotating eddy current inspection tool includes a body member having a connector at one end for mechanically and electrically attaching the body member to a rotating drive member while at the other an eddy current probe is supported for radial movement with r |
| 5056056 |
Data recorder including a recirculating non-volatile memory |
October 8, 1991 |
| A light weight data recorder employs a non-volatile electronic memory to store several channels of data occurring before and after a triggering event. Data may be retained in the memory with the aid of a NiCad battery. Upon the occurrence of a triggering event, which may be user defined, |
| 4912334 |
Infrared aircraft beacon light |
March 27, 1990 |
| An infrared aircraft lighting system designed for use in connection with night vision goggles includes a ring structure containing infrared lights that is installed between an existing visible light beacon and the aircraft outer surface, without requiring modification of either the a |
| 4854156 |
Pneumatic surface-following control system |
August 8, 1989 |
| An apparatus for maintaining the end of a probe carrying a sensor, such as an eddy current probe, a predetermined distance from a workpiece includes a housing in which a piston is permitted to move. Air under pressure, introduced into a first chamber formed within the housing, acts on a |
| 4731515 |
Method of making powders by electro-discharge machining in a cryogenic dielectric |
March 15, 1988 |
| Powders, and particularly metallic powders, are produced by electro-discharge machining of electrically conductive electrodes made of the desired materials in a cryogenic dielectric. When a sufficient quantity of powder has been produced, the cryogenic dielectric is allowed to evapor |
| 4590408 |
Linear/resonant CRT beam deflection circuit |
May 20, 1986 |
| In a dual mode CRT deflection circuit, a capacitor for effecting rapid retrace of the CRT beam by means of resonant nonlinear operation is selectively shunted such that beam deflection may be linearly controlled. A bidirectional switch preferably comprising a field effect transistor |
| 4582680 |
Multiphase backing materials for piezoelectric broadband transducers |
April 15, 1986 |
| An acoustical transducer is provided with an acoustically absorbant backing material having an acoustical impedance precisely matching the impedance of the piezoelectric element in the transducer. The backing material is a multiphase mixture of selected materials, such as a low melting p |
| 4581070 |
Multiphase backing materials for piezoelectric broadband transducers |
April 8, 1986 |
| An acoustical transducer is provided with an acoustically absorbant backing material having an acoustical impedance precisely matching the impedance of the piezoelectric element in the transducer. The backing material is a multiphase mixture of selected materials, such as a low melting p |
| 4515478 |
Coherent light detecting system including passive averaging network |
May 7, 1985 |
| Interference patterns are generated in response to temporally coherent light incident upon an interferometer which directs the interference patterns upon an array of photosensitive elements. The photosensitive elements are connected to generate signals representative of the optical e |
| 4482835 |
Multiphase backing materials for piezoelectric broadband transducers |
November 13, 1984 |
| An acoustical transducer is provided with an acoustically absorbant backing material having an acoustical impedance precisely matching the impedance of the piezoelectric element in the transducer. The backing material is a multiphase mixture of selected materials, such as a low melting p |
| 4470696 |
Laser doppler velocimeter |
September 11, 1984 |
| Reflections, having positive and negative Doppler frequency shifts, from a laser beam directed at a moving surface are passed through spatial filters, combined by a beam splitter, and focussed on an observation plane of a photodetector to provide a fringe pattern having an amplitude |
| 4457174 |
Ultrasonic inspection of composite materials |
July 3, 1984 |
| A method of ultrasonically inspecting the internal structure of a multi-ply composite material using ultrasonic transducers includes the steps of positioning an ultrasonic transmitter in acoustical contact with one surface of the material, directing a beam of acoustic energy into the |
| 4376742 |
Fugitive liquid phase densification of silicon nitride |
March 15, 1983 |
| Dense silicon nitride bodies are fabricated using conventional hot-pressing techniques using cerium oxide as a densification aid. The bodies are then further treated in a flowing inert atmosphere at a temperature of from 1400.degree.-1600.degree. C. for from several hours to 48 hours to |
| 4292848 |
Walking-gate ultrasonic flaw detector |
October 6, 1981 |
| A microprocessor-based ultrasonic inspection system reliably detects fatigue cracks smaller than 0.030 inch under installed fasteners by means of a unique signal-processing method. The signal-processing used in this invention takes advantage of the fact that crack signals "walk" in time |
| 4097849 |
Electronic comparator for process control |
June 27, 1978 |
| An optical micrometer scans an article passing through its zone of measurement to provide a series of pulses representing the dimension of an article. Each new measurement is compared against a previous measurement, or an average of a predetermined number of previous measurements, and th |
| 4097158 |
Half-maximum threshold circuit for optical micrometer |
June 27, 1978 |
| An optical micrometer includes circuit means for determining accurately the passage of a scanning beam of light across the edges of an article placed within the zone of measurement. By sensing the half power point of the beam as received by a photodetector, the accuracy of the measuremen |
| 4082463 |
Calibrated optical micrometer |
April 4, 1978 |
| A method and apparatus for calibrating an optical micrometer utilizes a precisely dimensioned grate which is temporarily introduced into the optical path of the instrument within its zone of measurement. A beam of light is scanned through the zone of measurement and across the grate, and |
| 4074938 |
Optical dimension measuring device employing an elongated focused beam |
February 21, 1978 |
| In an optical dimension gauging instrument, commonly referred to as a laser micrometer, particularly for use in measuring the outside dimension of elongated cylindrical objects, such as coated wires or steel tubes, in hostile optical environments, including a laser for generating a beam |
| 4007992 |
Light beam shape control in optical measuring apparatus |
February 15, 1977 |
| A narrow collimated light beam, such as a laser beam, is directed towards a mirror which is rotated to effect rotary planar scanning or sweeping of a lens constructed to convert the rotary scanning beam into a parallel scanning beam. An article to be measured is positioned in the path of |
