| Patent Number |
Title Of Patent |
Date Issued |
| RE30564 |
Servo systems |
March 31, 1981 |
| A servo control system comprising, in a feedback loop, means for providing an error signal representing the difference between desired and actual conditions of a controlled system, and means responsive to said error signal to produce a control signal for the controlled system; the contro |
| RE29906 |
Apparatus for mounting semiconductor devices |
February 13, 1979 |
| Semiconductor devices are mounted on corresponding lead frames by being inserted into apertures of a masking member in a desired registration with the lead frame strip. |
| 4524347 |
Position encoder |
June 18, 1985 |
| A position measuring device includes a conventional encoder, a scale member and an index member together arranged to provide two periodic waveforms of the same frequency and in quadrature with one another. Errors in the waveforms are corrected, and the corrected waveforms used to produce |
| 4479437 |
Explosive mine |
October 30, 1984 |
| A marine mine 10 (FIG. 4) is arranged to have a buoyancy state in which the force of gravity and/or buoyancy act on the mine in a vertical direction to move the mine through the water and includes control means operable to control guidance surfaces 16, 17, 18 projecting from the mine to |
| 4393437 |
Cooling means for circuit assemblies each including hollow structures spaced apart in a containe |
July 12, 1983 |
| A circuit assembly having a plurality of planar substrates 14 with modules and/or components 13 mounted thereon, has the substrates comprising at least parts of walls of substantially enclosed hollow structures 15, for example, the substrates comprising two opposing and parallel walls of |
| 4392718 |
Resistive electrode LCD and voltage supply means |
July 12, 1983 |
| A liquid display device comprises two spaced electrodes each having a resistance characteristic such that a potential gradient may be developed across the electrode. A liquid crystal material is located between the two electrodes. Voltage supply means are provided which apply an alternat |
| 4380694 |
Laser cutting apparatus |
April 19, 1983 |
| Laser cutting apparatus comprises a laser (20), means (24,25) for directing the output beam of the laser on to a workpiece (26), and means such as a quarter-wave plate (27) for producing circular polarization of the laser output beam. The laser may include within its optical cavity an el |
| 4369485 |
Circuit assemblies each with a component cooperating with a connector and clamp to a substrate |
January 18, 1983 |
| A circuit assembly comprises a planar substrate 10 supporting, on a surface 11, connectors 14 and modules 12, the connector pieces of the connectors, and the module leads, both extending at least substantially parallel to said one major substrate surface, and the modules are clamped to t |
| 4369365 |
Correction for scan period variation in optical image scanners |
January 18, 1983 |
| Correction for variations in scan period of optical image scanners includes measuring and storing the scan times at which optical events occur to cause image detector signals, detecting an optical marker near the end of the scan and the scan time of its detection, determining the differe |
| 4366527 |
Circuit assemblies each with a connector having an insulating block with two separable stacked p |
December 28, 1982 |
| A circuit assembly comprises a planar substrate 10 supporting, on a surface 11, connectors 14 and modules 12, each module having leads 13 extending from two opposing module surfaces, with the leads from one surface extending exclusively in one or two planes parallel to the module-bearing |
| 4352005 |
Trimming a circuit element layer of an electrical circuit assembly |
September 28, 1982 |
| In trimming a constituent layer (10) of a circuit element, through which layer current is to flow along an axis (14), a first channel (16), extending through the layer from one layer edge, (17), partially across the width of the layer, transversely to the axis, is provided in a first, |
| 4345330 |
Laser energy control circuit |
August 17, 1982 |
| A laser energy control circuit for a gas-discharge excited laser includes an energy source PSU to supply energy to the gas discharge. First circuit means TR1, TR2 operate to limit the energy supplied to a first value for a first time interval, after which second circuit means A1, A2 allo |
| 4344905 |
Gas lasers |
August 17, 1982 |
| A cathode electrode for a gas discharge laser comprises a block of platinum black compressed into a solid mass. |
| 4340969 |
Laser apparatus |
July 20, 1982 |
| Laser apparatus operable in the range 8 to 50 microns, has an optical cavity defined by two mirrors M1 and M2, one of which is partially transmitting. The cavity contains a laser active medium AM and a reflecting polarizer RP. The reflecting polarizer comprises a substrate carrying a |
| 4339172 |
Connector having a single segmented deformable grip member for optical cables |
July 13, 1982 |
| A connector for a light-transmitting cable 13 comprises a body member 10 in which are located a sleeve 11 of elastomeric material and a grip member 12. The grip member is segmented and deformable under radial pressure applied by the sleeve. The ends of two cables 13 may be inserted into |
| 4336528 |
Semiconductor resistive network |
June 22, 1982 |
| A network of different weighted resistances, for example, binary resistances, coupled in parallel with each other, is provided in a semiconductor body by providing a plurality of substantially identical resistors, with different numbers of the identical resistors being coupled in par |
| 4335611 |
Accelerometer |
June 22, 1982 |
| An accelerometer comprises an electric coil pivotally mounted in a magnetic field about an axis extending perpendicular to the field for oscillatory movement substantially perpendicular to the field, in the manner of a D'Arsonval movement. Switching means in the form of a radition source |
| 4332636 |
Method of bonding an optical element to a support |
June 1, 1982 |
| A method of bonding an optical element (12) to a support (10) requires the formation on the support of a thin pad (11) of material of substantially the same dimensions as the base of the optical element. The material of the pad is one to which the adhesive to be used will not adhere. The |
| 4331376 |
Electric connectors |
May 25, 1982 |
| An electric connector includes a housing having a number of elongated recesses, and a plurality of contacts. Each contact has a terminal portion, two spaced parallel support members extending between the terminal portion and a web, and two contact members located between the support |
| 4322710 |
Electrical resistors |
March 30, 1982 |
| An electrical resistor comprises a tube of resistive material having a closed end. An electrical connection is made to the open end of the cylinder, and a further connection comprises a conductor passing through the open end of the cylinder and connected to the closed end. A pair of |
| 4322672 |
Electric motor control apparatus |
March 30, 1982 |
| Electric motor control apparatus includes a variable-frequency oscillator 10, a counter 11 clocked by the oscillator, and signal generating means 12 arranged to generate two sinusoidal voltages in quadrature with one another. The two voltages are applied through separate amplifiers 22, 2 |
| 4292854 |
Gyroscopic apparatus having three-axis inertial platform with rapid warm-up |
October 6, 1981 |
| An inertial platform carries at least one dynamically-tuned free-rotor gyro and is mounted in a three-axis gimbal system. Accelerometers are carried on the platform with their sensitive axes aligned with the two sensitive axes of the gyro. During alignment of the platform, and while the |
| 4292586 |
Testing of circuit arrangements |
September 29, 1981 |
| Testing of thin film modules is facilitated by employing predetermined test procedures, so that analysis of the results is facilitated; and the test signals are supplied to, and the corresponding output signals are supplied from, the module terminals, a predetermined interface printed ci |
| 4288141 |
Insulation displacement contact for an electrical connector |
September 8, 1981 |
| A contact for an electric connector comprises a terminal element for connection to an electric conductor and a contact-making portion for connection to an electric circuit. The terminal element comprises two arms 10 and 11 joined by a link portion 12 and together defining a parallel |
| 4286252 |
Acceleration responsive monitor |
August 25, 1981 |
| Apparatus for monitoring the acceleration of an aircraft moving along the ground includes a linear accelerometer (FA) and a rate gyroscope (RG). The accelerometer FA is fixed to the frame of the aircraft with its sensitive axis substantially horizontal, and circuit means A3, A4, are prov |
| 4274694 |
Electrical connector having a plurality of in-line contacts |
June 23, 1981 |
| An electric connector includes a housing (10) of elecrically-insulating material having a base (11) and two side walls (12, 13). These define a longitudinal slot (14) into which a plug member (20) may be inserted. A plurality of projecting walls (16) define a number of transverse opening |
| 4266431 |
Gyroscopic apparatus |
May 12, 1981 |
| Gyroscopic apparatus comprises a gyroscopic device having two mutually perpendicular sensitive axes. The device is suspended in a two-axis gimbal system by means of cross-spring pivots of zero stiffeners. The gimbal system is further supported by a subsidiary suspension about two hor |
| 4257660 |
Electric connector having a plurality of in-line contacts |
March 24, 1981 |
| An electric connector comprises a housing (10) having a base (11) and two side walls (12, 13) together defining a longitudinal slot (14) into which a plug member may be inserted. A plurality of projecting walls (15) define a number of transverse openings (16) extending from the longitudi |
| 4254328 |
Dispensing preset amounts of a product |
March 3, 1981 |
| Apparatus for dispensing a preset monetary amount of product, such as fuel, sold by volume and for use with a dispenser which calculates and displays a continuously increasing cost of the delivery has a number of selector buttons which relate to units of cost and which when selected set |
| 4237537 |
Price display setting arrangements |
December 2, 1980 |
| A unit price setting arrangement for differently priced products available from a remotely located dispenser for example, grades of fuel, from a pump, consists of a central transmitter and a receiver in each dispenser. The transmitter forms a series of fixed length binary words, one for |
| 4225865 |
Gain-controlled amplifier circuits |
September 30, 1980 |
| Apparatus for controlling the gains of a pair of gain-matched amplifiers includes means for applying a pilot tone of constant amplitude to each amplifier through separate attenuators during a repeated correction time interval. Three control loops are provided, one of which compares the |
| 4224545 |
Speed control |
September 23, 1980 |
| A speed control arrangement for a rotatable member driven by an energy source, such as a spring, whose driving torque can vary consists of an eddy current brake comprising an eddy current rotor driven with the rotatable member and a magnetic circuit coupled to the rotor to exert a br |
| 4223335 |
Semiconductor device body having identical isolated composite resistor regions |
September 16, 1980 |
| A resistor comprises two identical resistor regions with each resistor region isolated within the semiconductor body by a P-N junction, and with one electrode-bearing end of each resistor region both connected together and to a common region surrounding the resistor regions within the |
| 4219780 |
Gain controlled amplifier circuits |
August 26, 1980 |
| Apparatus for controlling the gains of a pair of gain-matched amplifiers includes means for applying to each amplifier a pilot tone in the form of an exponentially-decaying periodic signal. The apparatus also includes three control loops, one for comparing the output of one amplifier wit |
| 4217787 |
Gyroscopic apparatus |
August 19, 1980 |
| A free rotor gyroscope has a gimbal supported for limited rotation about a rotatable shaft by a first flexure suspension and a rotor attached to the gimbal by a second flexure suspension. Pickoff means rotate with the gimbal and detect its movements about its axis of suspension. |
| 4210838 |
Gas discharge display panel |
July 1, 1980 |
| In a gas discharge display panel consisting of a matrix of discharge cells defined by gas filled cavities in a block and having cathodes formed by sets of conductors on an end plate sealing the cavities and in which the matrix includes priming cells which are energized to provide from th |
| 4201898 |
Inertia switches |
May 6, 1980 |
| An inertia switch comprises a spiral spring-like member supported by a post in a housing, the spring comprising one contact of the switch and the housing the other. The post is insulated from the housing and provides a terminal for the switch. Acceleration or shock applied to the switch |
| 4201432 |
Electric connectors |
May 6, 1980 |
| An electric connector for interconnecting two printed circuit boards comprises a socket member for attachment to one board and a plug member for attachment to the other board. The socket member contains a number of rows of rigid contact members, while the corresponding contact members in |
| 4196419 |
Analog to digital converter |
April 1, 1980 |
| A circuit for digitizing data represented by a variable electric current includes a capacitor to which a variable direct current is applied, and a reference stage defining two voltage levels and producing a control signal when the voltage across the capacitor reaches one of the two level |
| 4193017 |
Gas discharge display panel |
March 11, 1980 |
| A d.c. gas discharge display panel consists of a rectangular array of discharge cells suitable for displaying alphanumeric characters surrounded by a circular array. The two arrays share one common set of conductors and are addressed sequentially by reducing the potential on the common |
| 4185230 |
Gas discharge display panel having an array of discharge cavities and a self scan glow transfer |
January 22, 1980 |
| A gas discharge display panel has a glow transfer device extending along one or both edges of the panel and consisting of a row, or rows, of cavities extra to the display. One electrode of the, or each, transfer device is common to the conductor associated with the display cavities at |
| 4181863 |
Photodiode circuit arrangements |
January 1, 1980 |
| Temperature regulation of an avalanche photodiode is obtained by internal heating, by passing a reverse current through the breakdown region of the photodiode. In operation, an empirically-derived, reverse bias potential, equal to the breakdown potential at the desired operating temperat |
| 4172666 |
Inspection apparatus |
October 30, 1979 |
| To distinguish between different types of fault detected by laser scanning of a moving web two or more detectors are arranged to collect light reflected in different ranges of angles in direction of web motion. By combining outputs of these in a logical way representing increases or |
| 4161742 |
Semiconductor devices with matched resistor portions |
July 17, 1979 |
| In an integrated circuit semiconductor device different matched resistors are provided by at least one resistor comprising at least two matched resistor parts connected together, these resistor parts also being matched to each constituent resistor part of at least one different matched |
| 4160990 |
Semiconductor devices and circuit arrangements including such devices |
July 10, 1979 |
| A circuit arrangement at least partially embodied in a collector-diffusion-isolation (CDI) type device, in a semiconductor body comprising a thin layer initially wholly of one conductivity type on a substrate of the same conductivity type, has at least one component comprising a modi |
| 4160455 |
Heater for heating fluid in a body cavity |
July 10, 1979 |
| A heater for heating fluid within a body cavity of an animal say for heating tumours by irrigation, comprises a container having inlet and outlet ports through which fluid in the cavity is passed by an external pump, and a heating element in the container to heat at least some of the |
| 4156856 |
Gas lasers with platinum black cathode |
May 29, 1979 |
| A gas discharge laser has a cathode electrode comprising a block of platinum black compressed into a solid mass. |
| 4155012 |
Discrimination circuit arrangements |
May 15, 1979 |
| A discrimination circuit operable to discriminate between an input signal in the form of a pedestal and disturbance signals superimposed thereon has an A-D converter to digitize a disturbance-free reference pedestal signal, circulating shift register to store the digitized reference sign |
| 4152942 |
Inertial platforms |
May 8, 1979 |
| An inertial platform having four gimbals, an intermediate one of which is capable of only limited movement, has pickoffs and torque motors on each gimbal axis. Part of the intermediate gimbal and an adjacent gimbal are removable, these parts being joined by a gimbal bearing. |
| 4150767 |
Liquid blending and dispensing apparatus |
April 24, 1979 |
| Liquid dispensing apparatus for dispensing a blend of first and second liquids has flowmeters operable to measure the quantity of each liquid delivered. The flowmeter outputs are multiplied by a factor equal to the proportion of one liquid in the blend and used to control a stepping moto |
