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| Number | Title | Issue Date |
| 4756600 | Plastics packaged optical fibres A design of plastics packaged glass optical fibre in which the plastics packaging consists of a urethane acrylate primary coating, a silicone rubber secondary coating and a nylon tertiary coating, the three coatings coacting to provide a pair of substanti... | 07/12/1988 |
| 4752156 | Laser-guided portable screed A system for facilitating leveling of a screed as the screed is being drawn across freshly-poured concrete. The system includes a stationary signal transmitter which is separate from the screed and which generates a planar leveling signal. Mounted on the ... | 06/21/1988 |
| 4749293 | Ribbon cassette for printers A cassette for an inked ribbon has a ribbon storage region, in which the ribbon is stored in tightly packed random folds, between two parallel walls spaced apart by a distance slightly in excess of the width of the ribbon. The storage region is bounded by... | 06/07/1988 |
| 4750166 | Conference circuit A conferencing module, for conferencing two PCM words uses threshold detectors (7, 8) to assess whether the word represent signals above a preset threshold, plus a comparator (1) to determine the larger signal. One or other is switched by an electronic sw... | 06/07/1988 |
| 4748664 | Telephone power supply To provide an adequate dc supply to the electronics of a telephone, when on hook or off hook, there is a transistor (T2) with its emitter-collector path in one line wire, and a storage capacitor (Cpsu) across the input to the telephones's circuits. This c... | 05/31/1988 |
| 4747944 | Recirculating filter system A recirculating filter system for purifying heated liquids, primarily cooking oils or lard, has a sealed filter canister having therein a cotton fiber filter and an upper lid and baffle chamber assembly. An inlet orifice at the bottom of the canister is f... | 05/31/1988 |
| 4748307 | Tube furnace The evolution of particulate material from the inner surface of a tubular zirconia susceptor while fibre is drawn from preform is inhibited by providing that surface with a glassy finish by laser-beam fusion.... | 05/31/1988 |
| 4745626 | Decoder A decoder is described for a self-clocking code, e.g. a bi-frequency Manchester code. Transitions are detected in the encoded data and are clocked into a shift register by a clock having a frequency equal to a multiple of the data bit rate. A logic networ... | 05/17/1988 |
| 4744190 | Spacing retainer including locking means for reinforcements The spacing retainer contains spacer elements comprising a multiple number of interconnected angle elements and locking elements. The locking elements are lockingly connected with a first structural steel fabric by means of locking parts at their free end... | 05/17/1988 |
| 4744483 | Tamper evident cover A tamper evidencing covering for containers, comprising a hollow container cover and a frangible ring shaped to fit about the cover. The cover includes an external annular retention recess for accommodating the frangible ring, and an annular internal lock... | 05/17/1988 |
| 4743871 | Adaptive filter An adaptive filter may be realized by weighting the outputs from a tapped delay line. This, however, allows nulls to corrupt a wanted signal spectral region. A fixed (non-adaptive) filter (2) coupled between the signal input and an input of means (3) for ... | 05/10/1988 |
| 4739697 | Brew chamber with filter spacer An improved brew chamber with filter spacer and support frame for use in an electric coffeemaker. The support frame being resiliently engagable within said brew chamber to be spaced from the chamber bottom whereby filter paper may be received within said ... | 04/26/1988 |
| 4740958 | Data transmission system A data transmission system is described, comprising a plurality of processing nodes (10-13). At any given time, one of the nodes acts as a star coupler, for broadcasting messages to all the other nodes. This node uses a plurality of counters (361-363) to ... | 04/26/1988 |
| 4738256 | Surgical tool A surgical tool, for use in hip replacement operations comprises a substantially linear stem which in use seats within a preformed femur cavity. A fixed arm extends medially from an upper portion of the stem and terminates in support for a rotatable cutte... | 04/19/1988 |
| 4737026 | Plural wavelength optical fibre reflectometer A dual wavelength reflectometer for single mode fibre is provided with separate lasers (5, 6) with emission wavelengths at 1300 and 1550 nm whose outputs are combined using a single mode optical fibre wavelength multiplexer (7) of tapered coupler format. ... | 04/12/1988 |
| 4737006 | Optical fiber termination including pure silica lens and method of making same A single mode fiber expanded beam termination is formed by fusion splicing an undoped (pure) silica rod to a single mode fiber. The length of the rod controls the expanded beam diameter, and forms a lens on the free end of the undoped silica rod to collim... | 04/12/1988 |
| 4737101 | Oil burner An oil burner of the air atomizing or vaporizing pot type has means to supply oil and combustion air to a combustion chamber adjacent a fluid chamber which receives heat therefrom. Heated fluid is removed from and cooler fluid supplied to the fluid chambe... | 04/12/1988 |
| 4735648 | Optical fibre manufacture In an inside tube vapor phase deposition process for the production of doped silica glass by an oxidation reaction for optical fibre manufacture, in particular fluorine doped silica, the oxidation reaction is prevented from occurring until the reactant ma... | 04/05/1988 |
| 4736289 | Microprogram controlled data processing apparatus A microprogrammed processor in which instructions have alternative fast and slow microprogram sequences. The fast sequences are designed for speed, and can detect exception conditions but do not resolve them. The slow sequences perform all the necessary t... | 04/05/1988 |
| 4733968 | Datum sensing using optical grating Apparatus for detecting a datum position in a range of movement of a movable member, comprises a composite grating comprising first and second gratings. The first grating has first and second grating halves and the second grating has third and fourth grat... | 03/29/1988 |
| 4733676 | Sliced bale conditioning Apparatus for slicing tobacco bales for conditioning in which the bales are moved from a conveyor (2) onto an adjacent lift device (16) by a first pusher (6), and are then sliced by a slicing blade (20) which is moved horizontally into engagement with the... | 03/29/1988 |
| 4732447 | Homodyne optical coherent receiver for digital optical signals A receiver for modulated optical signals including a multiport optical fibre coupler arrangement (10) to one input port of which the modulated optical signals are applied and to another input port of which a local oscillator optical signal of substantiall... | 03/22/1988 |
| 4733116 | Angle sensor with reduction gear In a flat housing (10) a stator (12) is concentrically arranged relative to an input shaft (16) supported in the housing (10). A rotor (14) is seated on the input shaft (16). A reducing gear (18) constructed as a play-free planetary gear is arranged withi... | 03/22/1988 |
| 4731344 | Method of making a single heterostructure laser chip having sawn cavities and secondary saw cuts A sawn cavity single heterostructure laser chip is provided with secondary saw cuts to produce an inverted Tee shaped cross-section in order to limit the width of emission to less than the full width of the chip. The depth of the secondary cuts is arrange... | 03/15/1988 |
| 4730316 | Digital integrated circuits A digital integrated circuit is described in which the internal registers are organized into a number of serial shift paths to facilitate testing. Each path has a number of modes: USER, HOLD, SHIFT and SELF-TEST modes. These modes are controlled by shifti... | 03/08/1988 |
| 4730276 | Semiconductor memories A bit-line load for a static random access memory incorporates a load comprising a diode, and current limiting means in series with the diode, the diode/limiter assembly being shunted by a current source. This overcomes both the Vdd drop proble... | 03/08/1988 |
| 4729676 | Impact printing apparatus and ribbon cartridges A ribbon cartridge for printing apparatus is provided selectively with a color selection mechanism, when the cartridge is loaded with a multi-color ribbon, operated by moving the printer-carriage to a position beyond the print line limit and with a peg ar... | 03/08/1988 |
| 4730317 | Digital integrated circuits A digital integrated circuit is described in which the internal registers are organized into a number of serial shift paths to facilitate testing. Each path has a number of modes; USER, HOLD, SHIFT and SELF-TEST modes. Shifting of a path is achieved by pu... | 03/08/1988 |
| 4729092 | Two store data storage apparatus having a prefetch system for the second store Data storage apparatus comprises a main store, for example a microprogram store, with an associated address generating circuit. In order to extend the capacity of the store, an additional store is provided, but because of physical limitations this is remo... | 03/01/1988 |
| 4728906 | Tuning and calibration circuits for CW and sweep frequency signal generators A signal generating device and method of control thereof for producing a desired output frequency, the generator having coarse and fine tuning controls capable of producing frequency changes over a limited range, wherein the output of the device is combin... | 03/01/1988 |
| 4728947 | Addressing liquid crystal cells using bipolar data strobe pulses A method of addressing a matrix addressed ferroelectric liquid crystal cell is described that uses parallel entry of balanced bipolar data pulses on one set of electrodes to co-operate with serial entry of unipolar strobe pulses on the other set of electr... | 03/01/1988 |
| 4720781 | Data processing terminal having support module and portable display module for liquid crystal display The data processing terminal comprises a smectic liquid crystal flat panel display module (2) which is supported by a support module (1). The terminal also includes a keyboard (4). The display module (2) may be removed from the support module (1) and has ... | 01/19/1988 |
| 4719592 | Sequence generator A sequence generator for producing a sequence of binary numbers, comprises a counter, a priority encoder which encodes the contents of the counter, a memory addressed by the output of the encoder, an output register, and a logic circuit for modifying the ... | 01/12/1988 |
| 4718121 | Balanced coherent receiver In a coherent optical receiver using balanced photodetectors, local oscillator intensity fluctuations are nulled out by cross-correlating them with an imperfectly balance output to derive an error signal used in a feedback loop to optimize the balance.... | 01/05/1988 |
| 4717823 | Detector device having an array of detector elements for scanning a field of view In order to scan a rather large field of view quickly, the field of view is imaged, by an imaging optical system, in the plane of a detector having a substantially linear array of detector elements. The path of rays comprises a rotating optically refracti... | 01/05/1988 |
| 4716563 | Demodulation of auxiliary low frequency channels in digital transmission systems An arrangement for the demodulation of auxiliary low frequency channels in digital transmission systems comprising means (12) for receiving the transmitted signals, linear amplification means (13) with automatic gain control (AGC) (14) for the received si... | 12/29/1987 |
| 4716408 | Data transmission system of the star type with enablement passing A network provides communication between end units (1). Each end unit (1) received an entitlement to transmit in the form of a go-ahead. It is then able to transmit a frame of user data, which is broadcast by a central unit (7) to all other end units (1).... | 12/29/1987 |
| 4715498 | Sharps disposal system A disposal system particularly adapted for hospital use comprising two portions. The first portion is composed of a hollow, outer enclosure adapted for wall-mounting and including an elongated slot inlet at the top with a barrier adjacent the slot for res... | 12/29/1987 |
| 4716579 | Phase corrector A simple radio receiver for FSK signals is described in which the signals from the aerial are mixed in two high-gain mixers respectively with local oscillator signals in phase quadrature and at the signals' nominal center frequency. The outputs from the m... | 12/29/1987 |
| 4714991 | Microprogram control apparatus having variable mapping between microinstruction control bits and generated control signals A data processing apparatus, which includes a microprogram control unit for producing control signals for the apparatus. Each microinstruction contains a number of control bits, and an address field. The address field addresses a control memory so as to r... | 12/22/1987 |
