baber/WOPTO huggingface dataset:
Patent GB-2132448-A (GB)
Title: Telephone subscribers' line interface circuit
Inventor: BRIDGER PETER STUART
IPC: H04M19/00
Filed: 1982-12-07
Abstract: A line feed amplifier arrangement, for supplying to a telephone line the DC line feed, which is modulated with outgoing speech and AC signals includes as its central element a long- tailed pair (Q3-Q4) with a direct current source (CS1) connected to its commoned emitters via diodes (D3, D4). This current source it is which is modulated with speech and AC signals when in use, but the resulting DC+AC is still unidirectional. One transistor (Q4) of the pair has its base coupled to a reference voltage (VIN(+)) while the other (Q3) has its base connected to a voltage (VIN(-)) defined by the centre tap of two resistors (R1 and R2) connected across the line (A-B). Thus the long-tailed pair compares these voltages, and the currents which its transistors pass are controlled by the relation between those voltages. One transistor (Q4) has its collector connected to a current feed device (Q2-OA2) for one wire (B) so to control the current therein. The other transistor (Q3) of the pair has its collector connected to the input of a unity current ratio current mirror (Q6-Q5) the output of which goes to a current feed device (Q1-OA1) for the other wire (A) so as to control the current therein via the current mirror. These current feed devices are amplifiers, so that the control circuit including the long-tailed pair (Q3- Q4) is a low power circuit. Thus the current supply to the line is controlled on the basis of the comparator action referred to, and by the current from the current source. <IMAGE>
Patent GB-826968-A (GB)
Abstract: 826,968. Controlling gas burners. SPERRYN & CO Ltd. June 17, 1957 [June 16, 1956], No. 18725/56. Class 75(1) A safety control system for gas heated apparatus comprises two control units A, B controlling in parallel an electrically operated valve 18 supplying gas to a main burner 20, each control unit including a holding magnet which normally maintains the supply of gas to a common pilot jet 13 or to one of two separate pilot jets and which is energized by a separate thermocouple 14, 15 heated either by the common pilot jet 13, as shown, or by the corresponding one of the two separate pilot jets. A push button 10 on each control unit is pressed to open a pilot valve in each unit to supply gas to the common pilot burner 13. The push button also closes a switch to energize an ignliter. When the thermocouples 14, 15 have been heated sufficiently the push buttons 10 are released and return through a distance permitted by a lost motion coupling to close contacts in parallel conductors connecting a supply voltage and the electrically operated main valve 18 which opens. De-energization of either holding magnet, for instance due to a fault in its thermocouple, causes the closure of the corresponding pilot valve and the opening of the corresponding switch contacts in one of the parallel conductors. The main valve 18 remains open however since it is energized through the other parallel conductor. A visible and/or audible signal is energized on failure of either thermocouple. In a modification the pilot valves are operated by solenoids energized by switches closed by the push buttons and held closed by the holding magnets. Temperature and/or time control valves 21 are arranged in advance of the main valve 18. The closure of the contacts for energizing the main valve 18 may also be arranged to start up apparatus heated by the burner. Specification 823,159 is referred to.
Patent GB-2133693-A (GB)
Title: Dental anchoring device
Inventor: HINKS HERBERT NIELSON
IPC: A61C5/35
Filed: 1983-04-26
Abstract: A dental anchoring device comprises a stud (2), one end of which has a left hand screw thread and the other end of which has a right hand screw thread. <IMAGE>
Patent GB-2142852-A (GB)
Title: Grinding optical lenses
Inventor: MIDDLETON BRIAN JOHN
IPC: B24B13/01
Filed: 1983-05-06
Abstract: An overlay for grinding optical lenses has a backing of aluminium foil which prevents water from the grinding material from penetrating to the adhesive which secures the overlay to the tool head. The foil is bonded by one surface to a woven wire cloth and has on its other surface a coating of pressure- sensitive adhesive covered by a protective release paper.
Patent GB-2130069-A (GB)
Title: Whey treatment process and product
Inventor: MARQUARDT ROBERT F
IPC: A23C9/142
Filed: 1983-08-02
Abstract: Cheese whey is subjected to reverse osmosis, preferably carried out by use of a membrane having a salt (NaCl) rejection characteristic of 35 to 75%, with the whey being applied to the membrane at pressures which provide flux rates of about 8 to 18 GFD. The resulting permeate consists of water together with mineral salts derived from the whey and the retentate is a concentrated modified whey having a reduced ash content. The mineral salt content of the permeate consists mainly of monovalent salts, with the remainder of the mineral salts consisting mainly of mineral bivalent salts, remaining with the whey. The protein level of the retentate whey may be increased by ultrafiltration, to produce modified whey products of high protein value.
Patent GB-2128526-A (GB)
Title: Apparatus for making and breaking screw couplings
Inventor: JURGENS RAINER
IPC: E21B19/16
Filed: 1983-08-12
Abstract: Apparatus for making and breaking screw couplings between pipe members of pipe and drilling strings, includes a rotatable chuck (9) and a fixed chuck (17) both comprising fluid actuated pipe- gripping elements, the rotatable chuck being provided with a fluid reservoir (111) which maintains the pressure in the pressure-fluid-actuated chuck and allows an external fluid-pressure supply to be disconnected so that a continuous rotary movement of the chuck is possible by means of hydraulic motors through a pinion and a ring gear for the complete screwing or unscrewing of the pipe members. <IMAGE>
Patent GB-2130550-A (GB)
Title: Robot hand
Inventor: LORD DUNCAN
IPC: B25J15/04
Filed: 1983-11-24
Abstract: A mechanical hand (10) for a robot comprises a pair of change plates (15) each having a slot (19) therein to receive a prong (13) of a finger or gripper (12). The change plates (15) are slidable laterally of the hand (10) to align the slots (19) with the prongs (13) which may be retained in correct spaced disposition in a pallet (11). Locking pins (18) are located in aligned bores (17) in plates (15) and have a smaller diameter part (20) which traverses a slot (22) in a respective prong (13) so that when the change plates (15) are moved laterally the larger diameter part of the pins (18) are engaged in apertures (21) in the prongs (13) but will not traverse the slots (22) and thereby the fingers or grippers (12) are retained in the hand (10). The change plates (15) are movable by means of a piston/cylinder device (23) which may be double acting or single acting with spring return (16) provided. <IMAGE>
Patent GB-2137181-A (GB)
Title: Self-Closing Bottom Valve of a Receiving Container for Pasty or Fluid Substances
Inventor: ZULAUF KARLHEINZ
IPC: B65D25/38
Filed: 1984-02-01
Abstract: The bottom valve 4 of a receiving container 1 is a sealing lip valve formed in one piece from an elastomer. Two lips 7 abut along a median plane. An annular sealing seat 8 is arranged below the lips 7 coaxial with the valve and cooperates with a dispensing container 2 as shown in Fig. 3. <IMAGE>
Patent GB-2136380-A (GB)
Title: Conveyor belt constrained to an arcuate form within a tube
Inventor: COOK DENNIS LESLIE
IPC: B65G15/08
Filed: 1984-02-22
Abstract: An endless belt conveyor, in its passage from a loading station to a discharge station, passes through a tube 3, curving downwardly between its edges to a shape to which it is constrained by the tube. To facilitate the movement of the belt through the tube, air from a chamber 8, 9 is maintained between the belt and the tube. <IMAGE>
Patent GB-2140115-A (GB)
Title: Conduit coupling-electrical continuity
Inventor: MITCHELL STANLEY JAMES
IPC: F16L25/01
Filed: 1984-04-24
Abstract: A coupling for connecting electrical conduit, said coupling typically being manufactured by die-casting. The coupling comprises a hollow cylindrical male member 1 and a co-operating female member 10 which is screwed onto the male member. The interior of the female member additionally carries wedge- shaped projections 14, 15 on taper 8 which upon tightening of the coupling are deformed against a surface on the male member to provide a water-tight seal between the two members. <IMAGE>
Patent GB-2142964-A (GB)
Title: Temporary support device for a door, window or other frame
Inventor: CROWLEY KEITH VINCENT
IPC: E04F21/00
Filed: 1984-07-02
Abstract: A temporary support device for a door, window, or other frame, during the erection of a building, comprises a base (18), preferably in the form of a rectangular plate, a post (21), preferably of square box section, upstanding from the base, and support means having a part (22) slidable on the post (21) and an arm (23) extending or extendible therefrom, the underside of which is provided with teeth (25) to grip the top of a wooden frame, or holding means (30, 35) to grip either side of the top of a metal frame. Such a device does not adversely affect parts of the frame visible in the finished building, does not extend inwardly so as to form a hazard, and can easily be placed in position and removed. <IMAGE>
Patent GB-2148620-A (GB)
Title: Voltage multiplying rectifier
Inventor: TAKAMURA YOSHIO
IPC: H02M7/10
Filed: 1984-09-17
Abstract: The rectifier includes a plurality of AC power sources (V1,V2) generating AC signals eg. square waves, an even number of rectifying elements (D1-D8) to rectify the AC signals, a plurality of output capacitors (C3,C4,C5,C6) connected in series across the rectifying elements, and a plurality of capacitors (C1,C2,C7,C8) connected between the nodes of the rectifying elements and the terminals (a,b) of the AC power sources. <IMAGE>
Patent GB-2147364-A (GB)
Title: Anti-icing system for a gas turbine
Inventor: MEZZEDIMI VASCO
IPC: F02C7/047
Filed: 1984-09-19
Abstract: There is disclosed an anti-icing system for a gas turbine (1), in which heat is transferred from the turbine exhaust gas (2) to the inlet air (5) by an intermediate non- freezing heat-convection fluid, which circulates in a circuit (8), and by two heat exchangers (6, 11) disposed respectively at the turbine exhaust and intake. Means such as a damper (12) is provided for controlling the quantity of heat supplied to the intake air. Alternatively a further heat exchanger may be used to cool the fluid in a controlled manner. <IMAGE>
Patent GB-2165198-A (GB)
Title: Inflatable sea anchor
Inventor: RISBRIDGER LEO WILLIAM
IPC: B63B21/48
Filed: 1984-10-08
Abstract: A sea anchor has a collar 2 which is attached to the wide end of the drogue 1 the collar being inflatable by means of valve 3 for immediate use. A ballast weight 4 is provided attached to the bottom of the drogue in order that the sea anchor will float just below the water surface for maximum drag, and prevent drogue rotation and fowling on the sea bed. <IMAGE>
Patent GB-2165731-A (GB)
Title: Beach fishing bait shuttle
Inventor: OSBORNE REGINALD EDWARD
IPC: A01K97/02
Filed: 1984-10-24
Abstract: The shuttle is a device for the casting, protection and presentation of bait, comprising a weighted nose section 3. connected to a vented bait chamber 4. wherein the baited hook is placed. The shuffle is attached to standard paternoster end tackle or the special wired accessory shown 6, 9, 10 which by maintaining a fixed relationship with the shuttle helps to eliminate tangles. After being cast and hitting the water the baited hook is expelled from the bait chamber 4. by force of water through the vents 2. The shuffle then settles on the sea bed, with bait exposed, where it is anchored by collapsible grip wires 5. held in place by a rubber band.   The wires collapse upon striking and the rubber band comes to rest in the notches 7. and is thus retained for further use. Upon retrieval the shuttle will tend toward the water surface. <IMAGE>
Patent GB-2167574-A (GB)
Title: Transducers for optical frequency shifting arrangements
Inventor: DAKIN JOHN PHILIP
IPC: G02F1/01
Filed: 1984-11-02
Abstract: An optical frequency translator comprises a transducer 2 which is operatively associated with an optical fibre 1 in order to produce mechanical stressing of the fibre and which is arranged to be supplied with an electrical saw-tooth waveform. The transducer is embodied within malleable damping material 5 which effectively suppresses mechanical "ringing" that would otherwise be produced by the transducer. A negative feedback arrangement 7, including a strain or pressure gauge 6, may be provided to constrain the transducer to follow closely the saw-tooth input waveform. <IMAGE>
Patent GB-2152662-A (GB)
Title: Passive infrared movement detector
Inventor: SCHMIDT BERND
IPC: G08B13/193
Filed: 1985-01-02
Abstract: In a passive infrared movement detector having a reflector which consists of a plurality of individual reflector facets for directing the radiation from a plurality of fields of vision to an infrared detector arrangement the individual reflector facets are in the form of separate spherical reflectors 4 arranged on a reflector carrier 1 in a manner so as to be shiftable in different directions (e.g. along slots 2 and 3) and lockable in adjusted positions (eg by clamps 6). This avoids the disadvantages of a reflector composed of a plurality of facets on its reflecting surface that for each required distance range of the passive infrared movement detector a reflector adapted thereto must be used, and that such reflectors are relatively expensive. <IMAGE>
Patent GB-2154497-A (GB)
Title: Hand machine tool, particularly hammer drill or percussion drill
Inventor: BUCK MANFRED
IPC: B25D16/00
Filed: 1985-01-18
Abstract: In a hand machine tool, particularly a hammer drill, with a drilling transmission (18) and striking mechanism (19) driven by an electric motor, in order to damp the vibrations and to damp the tool recoil impulses, the drilling transmission (18) and the striking mechanism (19) are combined to form a subassembly which is mounted with longitudinal sliding mobility in the interior of the machine housing (10) and is braced against the housing (10) by spring elements and/or damping elements (54,56). The driving connection between the motor shaft (15) and a driving shaft (20) common to the drilling transmission (18) and to the striking mechanism (19) is provided with large axial play (Figure 1). In another embodiment (Figure 12 not shown) a wobble element (429), which is rigidly connected to a driver (432) of the striking mechanism (419), is arranged on the driving shaft (420) with axial sliding mobility counter to springs (404, 405). <IMAGE>
Patent GB-2177291-A (GB)
Title: Cleaning apparatus
Inventor: HADLAND JOHN GILBERT
IPC: A01K63/10
Filed: 1985-07-01
Abstract: Apparatus for cleaning the floor 11 of a tank e.g. a sludge settling tank comprises a suction/jet unit 13 connected to a suction pump 22 via pipes 15, 16, 19 and catch-pot 20, the jets being derived by flow of liquid through nozzles 26 when the suction pump is operated. Ponds and silos many also be cleaned by such apparatus. <IMAGE>
Patent GB-2177456-A (GB)
Title: Centrifugal pump
Inventor: PALLISER ALFRED MILBANKE HUDSO
IPC: F04D13/02
Filed: 1985-07-01
Abstract: The pump comprises an impeller 9 provided with a tooth 18 for engaging a tooth 10 of a rotor 7. The rotor has a projection 8 for centering the rotor in its housing and is partly surrounded by a magnetic core 14. The impeller 9 has a projection 19 which engages a seat 20 in the rotor and is driven by the engagement of the teeth 18, 10. Holes 21 in the impeller allow water to enter the rotor housing to assist centering of the rotor. A volute 3 has an inlet pipe 30 provided with a pin 32 for centering the impeller. <IMAGE>
Patent GB-2164898-A (GB)
Title: Thin polyethylene films
Inventor: BURLET RUDOLF JOHANNES HUBERTU
IPC: C08J5/18
Filed: 1985-09-27
Abstract: Smooth, glossy, thin films based on linear polyethylene with Mw > 4 X 10<5>, preferably above 8 x 10<5>, having a strength above 1 GPa, a modulus above 20 GPa, and a FEM value above 150 KJ/m, and having a thickness of below 25  mu m, preferably below 2  mu m, an opacity below 15% and a water vapour transmission value below 0.6. Such films can be prepared by spinning or extruding a semidiluted solution of polyethylene, thermoreversible gelation of the spun or extruded article, followed by high, biaxial stretching.
Patent GB-2166123-A (GB)
Title: A two-piece dispensing closure
Inventor: BUSH RANDALL GRAHAM
IPC: B65D47/08
Filed: 1985-10-11
Abstract: One piece of a two-piece dispensing closure (10) comprises a cylindrical screw cap (12) which has a dispensing orifice (22). The second piece is a lid (24) having a plug (28) to engage the orifice (22). The cap (12) and lid (24) are joined in a manner permitting the closure to be taken apart for cleaning and to be easily reassembled. The cap (12) has a pair of upwardly extending posts (34) having facing spherical projections (36). The lid (24) is provided with a pair of complementary slots (38) to receive the posts (34) and complementary spherically concave indentations (40) to receive the projections (36) on the posts. This hinge (26) permits movement of the lid between an open and a closed position with friction retaining the lid in any intermediate position. <IMAGE>
Patent GB-2166614-A (GB)
Title: Digital to analogue converter
Inventor: JACKSON THOMAS
IPC: H03M7/00
Filed: 1985-10-29
Abstract: An interpolating digital to analogue converter 2 comprises a combiner 4 receiving a digital input signal. The output signal of the combiner is fed via a digital controller 6 to a one step quantiser 8. The output signal of the one step quantiser 8 is fed via a feedback loop 10 to the combiner 4, where it is combined with the digital input signal, and also to an analogue filter to provide a voltage output which is proportional to the digital input signal. <IMAGE>
Patent GB-2170841-A (GB)
Title: Hammer for use in a bore hole and apparatus for use therewith
Inventor: ENNIS MELVYN SAMUEL JAMES
IPC: E21B4/14
Filed: 1985-03-18
Abstract: Apparatus for drilling a bore hole comprises a hammer (3) and a series of dual wall drill tubes (2). The hammer (3) is supplied with compressed air and is for use in applying successive percussive blows to a percussive drill cutting bit for taking core samples from the bottom of the bore hole while drilling same. An upstanding rig (37) is provided at surface level to support the hammer (3) and drill tubes (2) and to transmit push-down or pull-up movement thereto. First means (32) indexes rotationally the bit for drilling purpose and is operable by a portion of the supply of air. Second means conducts from the bottom end of the bore hole that portion of air used by and exhausted from the percussive cutting bit (27) and having core particles entrained therein. Third means comprises an annular flushing jet (7) to direct a portion of air upwardly through a sampling tube (6) co-axial with the drill tube (2) and hammer (3) to induce a venturi to assist in conducting core particle entrained exhaust air upwardly. <IMAGE>
Patent GB-2169236-A (GB)
Title: Shearing handpiece
Inventor: ALEXANDER LENNOX JAMES
IPC: B26B19/24
Filed: 1985-12-18
Abstract: A shearing handpiece includes an outer casing enclosing a driving fork 13 pivoted intermediate its ends upon a fulcrum pin 17 which is supported at its opposite ends within the casing, a comb 15 carried upon the casing, a cutter carried upon an end portion of the driving fork, and manually adjustable means 24 for displacement of at least the end portion of the driving fork to vary the closing force applied between the cutter and the comb. Instead of displacing the entire fork the cutter-end only of the fork may be displaced (Figures 4-6). <IMAGE>
Patent GB-2178606-A (GB)
Title: Terminations for mineral insulated electric cables
Inventor: MARTIN HENRY ANTHONY
IPC: H01R4/58
Filed: 1986-07-29
Abstract: A termination for a mineral-insulated electric cable comprises a pot filled with a permanently pasty and permanently adherent sealing medium that is convertible to a ceramic body under fire or other conditions exceeding the intended working temperature. The sealing medium includes a mineral filler, eg. bentonite, talc, kaolin and other clays, magnesium silicate, mica, magnesium oxide, zinc oxide, glass and mixtures of these and a fluid organic binder, eg. a non carbonisable silicone.
Patent GB-2179829-A (GB)
Title: Positron source
Inventor: COLEMAN DR CLIFFORD FRANCIS
IPC: G21K1/02
Filed: 1986-08-06
Abstract: A positron source (14) for producing a collimated beam of positrons of adjustable mean energy consists of a positron-emitting radioactive isotope (24) covered by an energy degrading plate (34) at one end of an evacuated collimator tube (48). The collimator consists essentially of an entrance pupil (28), a narrow throat (58) and an exit pupil (50). The throat and the walls of the duct adjacent to the entrance pupil are of low atomic number material. The duct is surrounded by gamma- absorbing shielding blocks (44,45, 46). The source (14) with a thin charged-particle-detector (60) over the exit pupil, may be used in conjunction with a gamma ray detector (16) to measure positron lifetimes in a sample (12) undergoing irradiation, and hence its moisture content over a depth determined by the mean energy of the collimated positrons. By removing positrons which might strike the sample obliquely the collimator also increases the average depth of penetration of positrons of a given mean energy.   <IMAGE>
Patent GB-2181073-A (GB)
Title: Adsorbers
Inventor: ISLES WILLIAM JOHN HUNTER
IPC: B01D53/04
Filed: 1986-10-01
Abstract: An adsorber, typically for use in extracting water vapour and carbon dioxide from air, comprises a vessel 2 having a lower support grid 8 and an upper grid 14. The space between the grids 8 and 14 is filled with suitable adsorbent particles through filling ports 18. The grids 8 and 14 permit gas to flow therethrough, and the vessel 2 is provided with gas ports 24 and 26. The grid 8 has a non-horizontal and typically inclined support surface 10 that makes an angle to the horizontal greater than the angle of repose of at least some and typically all the adsorbent particles. Any unevenness in the top surface of the bed 12 of adsorbent particles that occurs during operation is thereby confined to the section of the bed supported by the upper end of the grid 8. <IMAGE>
Patent GB-2184630-A (GB)
Title: A telephone apparatus
Inventor: O'NEILL LORCAN JOHN
IPC: H04M7/00
Filed: 1986-11-27
Abstract: A private automatic exchange comprising a plurality of extension line circuits and exchange line circuits. Each exchange line circuit comprises terminals (1) and (2) for connecting the circuit to an exchange line. Terminals (3) and (4) connect the circuit to a switching matrix of the private automatic branch exchange. The circuit comprises a current sink circuit which comprises a primary impedance circuit (21) and a secondary impedance circuit (22). The circuit (21) comprises resistors R31, R32, R33 and R40 and a Darlington pair of transistors T24 and T25. The secondary impedance circuit comprises a resistor R37 shunted across the primary impedance circuit by a field effect transistor T26. This is responsive to the level of current flowing in the primary impedance circuit. When the current flowing in the primary impedance circuit reaches a predetermined level, a transistor T27 is switched on, thus switching on the field effect transistor T26. <IMAGE>