baber/WOPTO huggingface dataset:
Patent GB-1486868-A (GB)
Title: Conference circuit
IPC: G10L25/78
Filed: 1975-05-13
Abstract: 1486868 Conference circuits; hybrid circuits; speech detectors INTERNATIONAL STANDARD ELECTRIC CORP 13 May 1975 [17 May 1974] 20077/75 Headings H4K and H4R In a conference circuit of the type wherein only one conferee is able to speak at a time, each input PT1-PTn is coupled via a 2-4 wire hybrid circuit DC1-DCn to an arrangement MC which interconnects the receive pair of wires le of each conferee with the transmit pair lr of every other conferee. Each input is in addition coupled via a speech detector to control logic LC which supplies control signals to the hybrid circuits such that the speech of only one conferee is supplied via the arrangement MC to each of the other conferees. The arrangement MC is also arranged such that a conferee does not receive back his own speech. At the start of the conference the logic LC nominates as speaker the conferee whose speech detector DP first indicates that speech is present and supplies control signals cb to the hybrid circuits to couple speech on wires lr through to the respective other conferees. In addition inhibit signals are supplied on wires ih to the speech detectors of all but the nominated speaker. When the nominated speaker stops speaking and has remained silent for more than a predetermined time, the inhibit signals are removed from the speech detectors to enable a new speaker to be nominated. Hybrid circuit.-Fig. 2 shows in detail the circuit units DA, DB of the hybrid circuits DC of Fig. 1, the inhibit signal cb being supplied to a differential amplifier AV, to switch it to a high gain condition. Any speech then arriving from the nominated speaker via wires R or from the conferee associated with the respective circuit DC is prevented from being coupled to the wires LE by virtue of the fact that the amplifier AV operates with a high level of negative feedback to maintain its input voltage level close to zero. In the absence of the inhibit signal amplifier AV is in a low gain condition and speech arriving on wires LP is coupled to wires LE. The gain of the amplifier may be controlled by using a field effect transistor. Resistors R1 and R3 are equal in value as are resistors R4-R7. Each speech detector (Figs. 3, 4, not shown) utilizes a differential amplifier (DA) of which the inputs are capacitively coupled across a resistor (R1) in one of the conferee's line wires, the output of the differential amplifier being coupled via three detecting circuits (TD) arranged in parallel to the respective inputs of an OR gate (pt). Each detecting circuit is a phase locked loop system, including a phase comparator, a low pass filter, an amplifier and a currentcontrolled oscillator, which operates to produce a significant output when an input signal within a predetermined frequency range and of greater amplitude than a set threshold level is present for longer than a predetermined minimum duration. The respective pass bands of the three circuits are chosen as 400-500 Hz, 500-600 Hz and 1350-1550 Hz which frequency ranges are linked to the first and second formants of vowel speech sounds.
Patent GB-949499-A (GB)
Title: Improvements in or relating to spooling machines
IPC: B65H67/08
Filed: 1960-06-08
Abstract: 949,499. Winding yarns. W. REINERS. June 8,1960 [June 12,1959], No.20095/60. Heading D1J. A thread winding machine comprises means located between a supply spool and a take up bobbin by which the thread end of the supply spool caused by a thread breakage, is retained in a predetermined position in which it is engageable by a finding device. As shown,the broken end F<SP>1</SP> of a thread coming from.a spool 12 and normally passing via guide 13, tensioner 14, yarn cleaner 15 and traverse drum 2 to a take-up bobbin 3, is sucked into a suction pipe 10 to be held clear of the machine parts. A feeler, not shown, normally in contact with the running thread, moves, on thread breakage, to initiate an automatic end-finding and reknotting operation in which,firstly,bobbin 3 is driven backwards to unwind a length of yarn and then lifted out of contact with its driving drum and secondly, seeker arms 5a and 6 move to engage and shift the thread ends to a reknotting device 7. Finally the bobbin 3 is moved into contact with drum 2 and winding is resumed. A rod 8 is attached to the arm 6 to close a valve'9 in the suction pipe 10 when the arm 6 moves so that the end F<SP>1</SP> is easily removable.
Patent GB-376021-A (GB)
Title: Improvements in or relating to steam stop valves
IPC: F16K1/44
Filed: 1931-07-13
Abstract: 376,021. Stop valves. YOUNG, J. W. The Croft, Meadow Road, Urmston, Manchester, BROWN, R. L., Sunside, Cumberworth, near Huddersfield, ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Crown House, Aldwych, London, and HOPKINSONS, Ltd Britannia Works, Huddersfield. July 13, 1931, No. 20137. [Class 135.] Lift valves; interconnected valve members.- In a steam stop valve arrangement having two separate lift closure discs 1, 2 disposed on interfitting coaxial spindles 11, 14 for operation by a single-unit screw mechanism 20, 21, &c. and seating on opposite sides of a seating diaphragm 7, a valve controlled leak-off conduit 26 is formed in the diaphragm in order to vent the space between the valve discs to atmosphere when the valve. arrangement is closed. The vent valve 30 is of the sliding type and is interconnected by a lever 33 and links 34, 38 with a floating head 23 forming part of the main screw mechanism whereby the vent valve 30 is automatically closed before the valve discs 1, 2 are separated. The pivot 32 is so arranged that the leverages on opposite sides of it allow for the differences in expansion between the links 34, 38, the latter being subject to the 'higher temperature owing to its close proximity to the valve casing 4. The screwed operating'member 21 has a coarse thread 21a, engaging a head 20 secured to the hollow spindle 14, and a fine thread 21b engaging the floating head 23 which has lost-motion between shoulders and upper nuts, as shown, on.pillars 16, 17. In opening the valve, rotation of the hand-wheel 22 raises the floating head 23, until it abuts against the upper nuts referred to, this action operating the links and lever 34, 38, 33 and closing the gate vent valve 30. With further rotation of the hand-wheel the valve 1 is opened quickly by the action of the coarse thread 21a operating on the bridge 20, rods 18, 19, and sleeve 14 ; at the same time the sleeve 21 and spindle 11 are depressed slowly by the action of the fine thread 21b to open the pilot valve 3 and finally the valve 2. The reverse sequence takes place in closing the valve.
Patent GB-202313-A (GB)
IPC: G11B3/70
Filed: 1923-08-09
Abstract: 202,313. Eichengr³n, A. Aug. 10, 1922, [Convention date]. Void [Published under Sect. 91 of the Act]. Records, blanks for.-Relates to the production of sound records from a composition consisting of one or more cellulose derivatives (esters or ethers, or a mixture thereof), together with a large proportion of organic or inorganic filling-material, with or without softening-agents or solvents. The composition is consolidated under heavy pressure and heat, or is rolled into sheets, or is disintegrated after gelatinizing and rapidly drying. Records may be moulded in the usual manner from the pulverulent or finely-granular pressed mass alone, or may be made with intermediate layers of different material as described in Specification 17574/12. Specifications 147,904 and 171,432 also are referred to.
Patent GB-1263965-A (GB)
Title: Improvements in or relating to core drilling apparatus for use in earth boring
IPC: E21B25/02
Filed: 1969-04-22
Abstract: 1,263,965. Boring earth and rock. E. J. LONGYEAR CO. 22 April, 1969 [30 April, 1968], No. 20474/69. Heading E1F. A core barrel inner tube assembly is latched to a drill stem having a core bit 11, and comprises an inner tube 28 threaded to a cap 29, a core lifter assembly 85, 87, and a tubular lining formed of a plurality of separate longitudinal sections 80, 81 located by a bored plunger 74 and a split ring 83. The core lifter is maintained centrally in a core bit 11 by an axially splined ring 14 which also deflects drilling fluid into an annular groove 11c communicating with outlets 88. Diamonds may be provided on the outer surface of a reaming shell 19. After a core has been taken and the core barrel removed to the surface, the tube is unscrewed from the cap and core lifter assembly and the plunger bore 77 plugged. The tube is then threaded to a cap connected to a pressure source, and pressure applied to displace the plunger and the lining together with the core, from the tube. (For Figure see next page)
Patent GB-467458-A (GB)
Title: Theatre chair
IPC: A47C7/56
Filed: 1936-07-23
Abstract: 467,458. Sliding and folding seats. HARD, M. W. July 23, 1936, No. 20482. Convention date, July 24, 1935. [Class 52 (ii)] In a theatre seat which is adapted to be retracted between fixed sides 10, Fig. 5, the backrest 18 is provided with forwardly extending side wings 17 which are supported on links 13, 23, and the seat is pivoted to the back-rest wings at 20, and normally rests on rollers 27 carried by arms 26 projecting from the links 23. The rear links 13 consist of rods, the tapered ends of which engage in conical sockets 12, 16 on the fixed side frames and.on the wings 17 respectively. Wire springs 30 prevent the links 13 from being disengaged from the sockets, while permitting rocking movement. The two front links 23 carry a frame 26 on which is mounted a roller 27 which engages a curved track 28 under the centre of the seat 19. Stops 29, preferably of rubber, engage the links 13 or 23 when the seat is in the forward or rearward position respectively. Partitions 33 are provided between the sides 10, and cushions 34, 35 are provided on the lower rear edge of the back-rest and the rear edge of the seat respectively to prevent injury to persons in the seat behind. The side-wings 17 are doublewalled, and the upper parts of the links 13, 23 are located between the walls.
Patent GB-1222756-A (GB)
Title: Isomerization of alpha isopropyl naphthalene to beta isopropyl naphthalene
Inventor: SCHARF EDWARD JONATHAN
IPC: C07C5/27
Filed: 1969-04-22
Abstract: 1,222,756. Isopropyl naphthalenes. AMERICAN CYANAMID CO. 22 April, 1969, No. 20498/69. Heading C5E. A mixture of alpha and beta isopropyl naphthalenes is isomerized to increase the content of beta isomer by contact at 300-400‹ C. with at least 1 wt. per cent, based on the mixture, solid phosphoric acid catalyst, e.g. phosphoric acid of kieselguhr. A solvent may be present, e.g. heptane, benzene or CCl.
Patent GB-696904-A (GB)
Title: Improvements relating to crystal valves
Inventor: NEWMAN DOUGLAS JAMES
IPC: H01L23/04
Filed: 1950-08-18
Abstract: 696,904. Crystal detectors. BRITISH THOMSON-HOUSTON CO., Ltd. Aug. 3, 1951 [Aug. 18, 1950; Feb. 16, 1951], Nos. 20529/50 and 3822/51. -Class 37. A crystal valve has a wall portion of its enclosure formed as a bellshaped member 3 of vitreous material, e.g. clear glass, sealed to one lead 4 and the enclosure completed by a thermoplastic synthetic insulating resin 5 moulded into contact with another lead 6, and the bell-shaped member 3. The resin may be flowed around a cup 8 mounting the crystal and the glass member 3, Fig. 1, while the electrodes are held in a jig for adjustment of the contacts or, Fig. 3, into the interior of the glass member 3 as far as a disc 9 of varnished paper or the like held above the cup 8. The rim of the bell-shaped glass member 3 may curve inwardly or outwardly and may be formed with one or more indentations or holes to retain more securely the plastic member. The lead 6 may have a transverse kink or extension 7 embedded in the plastic material to increase adhesion as described in Specification 696,896,
Patent GB-220801-A (GB)
Title: Improvements in or relating to searchlights and the like
IPC: B64F1/20
Filed: 1923-08-13
Abstract: 220,801. Smith, A. K. Toulmin-. Aug. 13,1923. Searchlight; buoy and like lamps.-Relates to fixed or revolving searchlight, beacon light, or like apparatus adapted to produce a narrow sector of light having a wide angle of divergence in the vertical plane and its intensity decreasing from a maximum in the horizontal direction to a minimum in the vertical direction. According to the present invention a carrier 12 is hinged to the front of a light projector 10 and carries a main flat reflector which lies in a vertical plane and is set at 45‹ or other desired angle to the axis of the projector so as to reflect a substantiallv horizontal main beam in a direction at right-angles to this axis. Subsidiary reflectors 17 - - - 24 whch lie in parallel planes one above the other have their surfaces set at a decreasing angle to the horizontal from top to bottom of the series and at an increasing angle to the vertical so that the beams reflected therefrom are in the same vertical plane as the main beam but at different angles to the horizontal, the reflector being so mounted that the reflected beams overlap and prevent blind areas. The main reflector may be made in one piece or in separate sections as shown in the Figure, two sets may be employed disposed symmetrically about the axis of the projector. The subsidiary reflectors may be bent longitudinally into angle form if made of metal, or bevelled in cross-section is made of silvered glass, so as to obtain vertical divergence of each subsidiary beam and to reduce the number of subsidiary reflectors.
Patent GB-441186-A (GB)
Title: Improvements in or relating to power-operated tools for tapping, screwing-up and like operations
IPC: B23B31/38
Filed: 1935-07-19
Abstract: 441,186. Screwing-up and unscrewing bolts, nuts, and screws; clutches. BOSCH AKT.-GES., R., 4, Militarstrasse, Stuttgart, Germany. July 19, 1935, No. 20542. Convention date, July 19, 1934. Addition to 429,810. [Class 83 (iii)] [See also Group XXIV] Screwing and tapping.-In a power-operated rotary tool such as a screwing-up and unscrewing machine or a tapping machine &c. the roller clutch described in the parent Specification is modified in details and is combined with a reversing clutch. Oppositely rotating gears a, b are secured against axial movement in a portable machine casing (not shown), and are provided with clutch teeth d<1>, c<1> co-operating with a clutch e secured to the spindle f which is slidable through the gears. A spring g normally maintains the clutch e in engagement with the gear a. A casing h is secured to the lower end of the spindle f and carries rotatably therein a clutch part i carrying a tool socket i<4>, a thrust bearing k being provided between the part i and the casing h. Three rollers s are mounted in radial holes in the part i which is cut away at i<3> to expose the middle portions of the rollers. A plate q, slidably keyed to the casing h by balls r, is provided with clutch teeth q<1> which are pressed into engagement with the exposed portions of the rollers s by means of a spring p abutting on a disc n secured in the casing h and locked by a screw m. In operation, with the gear a rotating the tool in a left-hand direction, the machine is lowered onto the work, whereupon the spindle f is moved axially to cause the clutch e to engage the gear band rotate a stud box, tap, &c. in the socket i<4> in a right-hand direction. On completion of the operation, the clutch i, q slips, whereupon the operator raises the machine and reverses the drive, the roller clutch enabling reversal to be effected without shock to the operator. The disc q may be changed without removing the remainder of the roller clutch to vary the fierceness of the clutch on reversal and so adapt the machine for stud setting, tapping, &c., or alternatively the clutch teeth q<1> may have different inclinations on opposite sides for this purpose.
Patent GB-705553-A (GB)
Title: Improvements in rings and for textile ring spinning or twisting machines
IPC: D01H7/60
Filed: 1952-08-15
Abstract: 705,553. Ring and traveller for ring spin ning or twisting frames. COATS, Ltd. J. & P. Aug. 15, 1952 [May 1, 1952], No. 20542/52. Class 120(2) A ring and traveller combination comprises a ring having an outer face extending downwardly and sloping inwardly from the top of the ring toward the centre thereof and an inner face extending parallel to the axis of the ring and a traveller made of a plastic mounted on and movable around said ring, said traveller having a leg located inside the ring, a foot extending around the bottom of the ring and a top bar extending over the top of the ring, said top bar having a nose extending downwardly in opposing relation to the inwardly sloping outer surface at the top of the ring, the nose portion having an inner surface opposing and sloping towards the leg of the traveller. As shown, the ring 10 has an annular flange 11 for supporting it in a frame. The outer face 12 at the bottom of the ring, and the inner surface 13 are generally parallel to the axis of the ring but the surface 15 at the top of the outer surface of the ring slopes downwardly and inwardly toward the centre of the ring. The traveller 16. has a top bar 17 carrying a hook or nose portion 18 which extends downwardly in opposing relation to the undercut surface 15 of the ring 10. It also has a leg 19 which extends down the inside of the ring 10 and carries a foot 20 which extends around the bottom of the ring 10. A strengthening rib 21 is provided on each side of the traveller each rib being increased in width at the point 21a where the thread T runs and at a point 21b near the bottom of the leg to increase the rigidity of the traveller. Specifications 627,157, 627,370, 627,371, 627,372, 627,373. 627,374 and 627,375 are referred to.
Patent GB-705144-A (GB)
Title: Circulating systems for congealable liquid
IPC: F16N39/04
Filed: 1952-08-15
Abstract: 705,144. Tubular heat-exchange elements. UNITED AIRCRAFT PRODUCTS, Inc. Aug. 15, 1952 [Aug. 17, 1951], No. 20626/52. Class 64(3) [Also in Group XXXIV] In a system for heating a congealable liquid (e.g. oil) (see Group XXXIV), a tubular heat-transfer element disposed in an oil tank (not shown) comprises radially extending sheet metal fin members 26 interposed between segments 27, together forming a tubular element with internal and external fins. Hot engine oil is directed through the element during the warm-up period to warm the oil in the tank.
Patent GB-863615-A (GB)
Title: Improvements in or relating to luminescent materials
IPC: C09K11/71
Filed: 1957-07-01
Abstract: 863,615. Luminescent materials. PHILIPS ELECTRICAL INDUSTRIES Ltd. July 1, 1957 [July 4, 1956], No. 20692/57. Drawings to Specification. Class 39(1). A luminescent material comprises #-orthophosphate of calcium or of calcium and strontium, in which the calcium to strontium ratio in moles is at least 1:99, activated by. 0.1 to 10% mol of bivalent tin and if desired by 0.1 to 5% mol of bivalent manganese, wherein a proportion of the calcium and/or strontium atoms is replaced by zinc atoms, the proportion being such that the quotient of the number of zinc atoms and the sum of the number of calcium and strontium atoms lies between 0.02 and 0.50, preferably between 0.08 and 0.20. The material is prepared by heating compounds of phosphorus, tin, calcium or calcium and strontium, zinc and, if desired, manganese at 500‹C.-600‹C. for one hour, then at between 1000‹C. and 1100‹C. in air for 2 hours, and finally at between 1000‹C. and 1250‹C., preferably between 1000‹C. and 1100‹C., in a reducing atmosphere, preferably nitrogen with 0.2 to 1 % of hydrogen, for half an hour. The powder obtained is cooled to about 400‹C. in the nitrogen-hydrogen atmosphere and then to room temperature in air. Specific examples are described together with the emission spectra produced when the materials are used with gas and/or vapour discharge tubes producing 2537Š radiation.
Patent GB-316612-A (GB)
IPC: H01K7/00
Filed: 1929-07-05
Abstract: 316,612. General Electric Co., Ltd., (Assignees of Patent-Treuhand-Ges. f³r Elektrische Gliihlampen). Aug. 1, 1928, [Convention date]. Drawings to Specification. Filaments. - To reduce the working temperature at weak or faulty places of greater resistance in spiral filaments, the pitch of the spiral is increased at these places. This may be effected by exposing the filament to a mechanical stress and momentarily incandescing it. The initial pitch of the spiral may be smaller than usual to compensate for the stretching.
Patent GB-1401388-A (GB)
Title: Information transmission system
IPC: H04L25/493
Filed: 1973-05-02
Abstract: 1401388 Digital transmission; coding DE STAAT DER NEDERLANDEN TE DEZEN VERTEGEBWOORDIGD DOOR DE DIRECTEUR-GENERAL DER POSTERIJEN TELE - GRAFIE EN TELEFONIE 2 May 1973 [2 May 1972] 20857/73 Heading H4P In an arrangement where the instant and direction of a transition between asynchronous bits is detected by high speed sampling at a multiple of bit rate and is specified by coding in an n bit character, a code word is generated in a fixed position in the character and the direction is specified in a fixed place in the word. The number of bits does not exceed the number of scans per shortest distance possible between transitions. At the receiver a reforming device decodes received words and includes a shift register having (word α + 1) stages with a majority decision operation of 2 out of 3 on three successive stages of the register. In arrangements described code words are shortened by one bit relative to prior art systems thus simplifying apparatus and increasing transmission speed. The encoder assigns 2 bits representative of the state after transition; either a 3 bit or 4 bit code word can be used. In a three bit word one transition bit r is given a value 0 for 1, 0 transitions and a 1 for 01 transitions, the position of transition being determined by the binary relativity of two other bits b, a. At the receiving end the bits are registered in a 4 bit shift register. With 4 bit words the direction of transition is indicated by 2 bits and the position by 2 bits which are received in a 5 stage shift register on which 2 out of 3 majority decision is performed. Should positive slip be detected, this is ignored but if negative, a bit of the previous value is inserted.
Patent GB-654893-A (GB)
Title: Improvements in or relating to electric ventilating fans
IPC: F04D25/10
Filed: 1948-08-07
Abstract: 654,893. Hinges. WEBLEY & SCOTT, Ltd., and SMALLWOOD, H. W. Aug. 7, 1948, No. 20884. Addition to 630,391. [Class 65(ii)] [Also in Group XXVI] An electric fan as claimed in the parent Specification comprises a fan guard and vane assembly in which aligned forks arranged on the guard locate and retain bearing pins supported in the ends of the vanes. Forked lugs 30, Fig. 4, are formed integral with a die-cast guard 3b. Each vane 4 has a socketed end 25 into which a bearing ball 26 is inserted as a push fit. A bearing pin 27 is inserted in a lug 30 and retained by pinching in the tips of the lug about a reduced portion 28. Each vane 4 is connected to a coupling rod 6<1>, Figs. 6 and 7, by means of a pin 34 which is received in a recess 33 and retained by pinching inwardly the margins 35 of the recess. Specifications 451,597, [Group XXVI], and 497,683 are referred to.