baber/WOPTO huggingface dataset:
Patent GB-1350142-A (GB)
Title: Controllable attenuator
IPC: H04M9/08
Filed: 1971-11-01
Abstract: 1350142 Volume control TELEFONAKTIEBOLAGET L M ERICSSON 1 Nov 1971 [27 Nov 1970] 50731/71 Heading H4R Controllable attenuator has two signal input terminals 1, 2, e.g. for a balanced input signal, connected to respective output terminals by resistors R2 and R3 with the emitter-base impedances of transistors V1, V2, connected in shunt to the output terminals and the emitter base impedances being varied by controlling the emitter current which is fed from a common variable current source V3, controlled by a control potential applied to terminal 5. The attenuator can be used in an echo suppressor for a loud-speaking telephone Fig. 2 (not shown), with the attenuator in the microphone path, and possibly the loud-speaker path, controlled by the signal fed to the loud-speaker.
Patent GB-1525506-A (GB)
Title: Digital antenna control apparatus for a communications terminal
IPC: H04B7/185
Filed: 1975-12-11
Abstract: 1525506 Antenna aiming WESTINGHOUSE ELECTRIC CORP 11 Dec 1975 [12 Dec 1974] 50808/75 Headings H4A and H4D An antenna for a communications receiver is provided with a system for periodically aiming it at a remote signal source (e.g. a satellite). The system permits slewing of the antenna about at least two axes and provides both a manual, "coarse", control of position and an automatic "fine" control of position. The automatic control device periodically samples the received signal strength, converts the samples to digital form, compares successive digital samples, and slews the antenna so as to seek the direction of maximum received signal strength. In the Fig. 2 embodiment, start/restart logic 46 enables a slewing sequence to be initiated either manually, or when received signal strength falls below a threshold value, or at predetermined intervals. The receiver AGC signal affords a measure of signal strength and is fed via amplifier 32 to meter 28 and sample-and-hold circuit 40. The samples from 40 are digitized at 42 and stored in register 50. Logic 52 compares the prevailing digitized sample from 42 with stored samples from 50 to determine whether the antenna is moving towards or away from or is at the position of maximum received signal strength while the antenna is being slewed about one axis, X, and controls X axis logic 48 to reverse or stop the slewing as necessary. Once the maximum position has been acquired, the antenna is slewed about the other axis, Y, under the control of logic 52 and 53, until a maximum position is again acquired. The maximum signal strength value, currently stored in register 50, is now loaded into register 54 so that logic 56 can compare subsequent stored values from register 50 with this maximum value to initiate further slewing sequences if received signal strength decreases. To prevent false operation of logic 52 it is inhibited if the samples to be compared differ by more than a given amount, as determined by signal stability test logic 58. A gain control arrangement 60, 34 provides for both manual control of the gain of amplifier 32 and an automatic gain increase if the received signal strength is below a predetermined level when the slew sequences are complete. Audible and lamp alarms are associated with the operations of gain control logic 60, the start/restart logic 46, the comparison logic 52, and the stability test logic 58. Details of the circuitry for the Fig 2 embodiment function blocks are given (Figs. 3 to 13, not shown); but a micro-processor could replace such circuitry.
Patent GB-1113857-A (GB)
Title: Electron tube device
IPC: H01J23/48
Filed: 1965-11-30
Abstract: 1,113,857. Velocity-modulated tubes. HITACHI Ltd. 30 Nov., 1965 [9 Dec., 1964 (2); 18 Dec., 1964 (2)], No. 50812/65. Heading H1D. A discharge tube includes a gun and focusing means for directing an electron beam to an output cavity resonator via a resonant multi-gap slow wave structure, which latter includes two sets of members, apertured for the passage of the electron beam, and supported respectively by two pairs of axially extending and circumferentially spaced support plates, the members of the two sets being spaced alternately along the path of the beam; in operation, stationary waves are excited by the electron beam on the slow wave structure such that fields of reversed phase and increasing intensity are induced in successive gaps between the members to velocity modulate the beam, which thereafter suffers density modulation before crossing the output cavity gap. The resonant slow wave structure disposed between the gun 1 and the output cavity resonator 4, includes support plates 6 and 7, and (8) and (9) or rectangular cross-section cavity 5, and supporting, at increasing intervals, apertured iron strips 10, 13, 11 . . . which provide periodic magnetic focusing in the presence of the focusing coil 24, and which may be copper-plated to reduce loss and improve thermal conduction. All the support plates 6 to 9 are shorted at one end by the gun casing 15, plates 8 and 9 only being shorted at the other end, by the wall 16 of the output cavity 4. In another embodiment (Fig. 2, not shown) the resonant slow wave structure 3 is coupled to the output cavity 4, by the extension of the plates 6 and 7 through apertures (18 and 19, Fig. 6, not shown) in the cavity wall 16 to the further cavity wall 17. The resonant frequency of the output cavity, compared with that of the slow wave structure, is in this case chosen such that the field in the output cavity when the coupled system is at resonance is in the correct phase to decelerate the bunched beam. The output from cavity 4 is via slots in the wall 17 to a section of coaxial line of which the inner conductor is formed by the outer wall 20 of the collector, and thence through dielectric dome 22 into waveguide 23. Coolant a circulates through channels in the cavity and collector walls.
Patent GB-1449277-A (GB)
Title: Starter arrangement for internal combsution engines
IPC: F02N11/08
Filed: 1973-11-01
Abstract: 1449277 Starting I.C. engines DUCELLIER ET CIE 1 Nov 1973 [24 Nov 1972] 50874/73 Heading H2H Starting apparatus for an I.C. engine comprises a starter solenoid energisable by means of a manually operable switch, a generator the voltage output of which is representative of the speed of the engine and means whereby the starter solenoid is de-energised when the output voltage of the generator has a desired value. A starter solenoid 1 which controls a starter motor for an I.C. engine is energised from a battery 2 when a manually operated starting switch 3 is closed by virtue of a starter relay 8 being energised over its contact 6 and a variable resistor 11, the energisation of the relay 8 closing contact 7 and opening contact 6. After the contact 6 opens the relay 8 remains energized by way of a variable resistor 9 but at a lower voltage the value of which is adjustable by the resistor 9. A tachometer generator 4, which generates a voltage which is dependent upon the speed of the engine, is connected to the relay 8 such that the generator voltage opposes the voltage applied to the relay from the battery 2. Thus, when the generator voltage reaches a given value the relay 8 de-energizes, contacts 6, 7 revert to their normal positions, the starter solenoid de-energizes and the starting operation is terminated. A diode 10 prevents the battery voltage being applied to the generator 4 and if desired a protective relay may be provided, the coil 12 of the relay being energized by the generator 4 when the voltage output thereof exceeds the given value to open a contact 13 so de-energizing the starting system. Alternatively the generator 4 may be the generator of a vehicle driven by the engine, in which case the battery 2 is charged therefrom by way of a conductor 15.
Patent GB-1489395-A (GB)
Title: Packaging machines
IPC: B65B61/06
Filed: 1975-11-18
Abstract: 1489395 Linkwork BAKER PERKINS HOLDINGS Ltd 18 Nov 1975 [26 Nov 1974] 51197/74 Heading F2K [Also in Divisions B8 and B4] In a packaging machine (see Division B8) a packaging web carried on continuously rotating discs 15 is periodically severed by a knife 40 mounted on an arm 39 pivoted at the other end 41 to another arm 37 on a fixed pivot 38. The necessary motion is imparted to these arms by axially spaced cams 42, 43 on shaft 44, cam 43 bearing against a follower 50 carried by a bell-crank 47 slidable in a slot 49 of arm 39. Knife 40 enters a slot 54 in a sealing wall 16.
Patent GB-1359697-A (GB)
Title: Fastening member
IPC: F16B21/16
Filed: 1971-11-05
Abstract: 1359697 Shaft couplings DUCELLIER & CIE 5 Nov 1971 [17 Nov 1970] 51473/71 Heading F2U An element 8 with an annular recess is mounted on a shaft 9 by a sheet metal, frustoconical member 1, having a plurality of teeth 4, 5 on its inner and outer edges, being permanently deformed (e.g. flattened as in Fig. 8) so that its teeth grip (e.g. deform) the shaft 9 and member 8 to prevent relative rotation or axial movement. The teeth 4, 5 need not be radially aligned. The edges 6, 7 of the undeformed member 1 may be cylindrical, Fig. 2, c.f. Fig. 8.
Patent GB-1285608-A (GB)
Title: Electrical connectors
Inventor: APPLETON ARTHUR IVAR
IPC: H01R13/15
Filed: 1969-10-21
Abstract: 1285608 Two-part couplings A I APPLETON 21 Oct 1969 51604/69 [25 Oct 1968] Heading H2E In a two-part coupling the male and female parts provide at least one pair of mating surfaces arcuate in cross-section and of the same radius of curvature, one of the surfaces being less than semicircular in cross-section, and a separate biasing means which is an integral part of the coupling biases a portion of the length of the mating surfaces together, providing at least two line contacts, preferably area contact. A double-ended socket 20 for use in a multi-contact bridge assembly (Fig. 1) comprises two arcuate portions 81 held together by resilient sleeve 83. Alternatively (Fig. 3 not shown) a helical spring surrounding the two parts of the socket may be the biasing means. Particularly for use in a bridging contact, one of the arcuate portions may be divided laterally and two separate C-rings may provide independent biasing against each male contact (Fig. 4, not shown). A connector for two conductors (Figs. 7 to 10, not shown) comprises an insulating body with a pair of female contacts located in through bores, each contact being in two parts held together and also positioned by a screw in a transverse bore, a pair of C-rings providing the biasing means. Each of the two parts has a recess into which the divided strands of a conductor are inserted and soldered. In Fig. 12 it is the male contact which is divided, portions 171, 172 fitting together to form a cylinder. The parts are biased apart by captive springs 173 and the assembly is held together by sleeve 174 and cotter pin 175. Part 172 may be plastics if connection afforded by 171 is adequate, or if both parts are metal a piece of braid (182) (Fig. 14, not shown) may enhance electrical contact between them. Instead of helical springs 173, a leaf spring may bias the parts apart to an extent limited by a pair of rivets holding them together (Figs. 16, 17, not shown). A male contact may alternatively comprise a substantially cylindrical member having a prong with two blind transverse holes 215 each containing a captive ball 216 biased outwardly by helical spring 217. The prong is not quite circular in cross-section to provide a surface A subtending an angle of less than 180 degrees which surface conforms to the surface of a female part of the connector.
Patent GB-1397839-A (GB)
Title: Flexible shaft construction
IPC: B04B5/04
Filed: 1972-11-09
Abstract: 1397839 Centrifugal separator INTERNATIONAL EQUIPMENT CO 9 Nov 1972 [22 Nov 1971] 51642/72 Heading B2P [Also in Division F2] A shaft construction comprises a flexible shaft 13 (e.g. with a length:diameter ratio between 15:1 and 30:1) surrounded by a rigid tube 15 for part of its length (and may have a resilient sleeve 14, e.g. of natural or synthetic rubber, sandwiched between the shaft and the tube; for connecting a motor 11 to a centrifuge rotor 10).
Patent GB-1496506-A (GB)
Title: Method of stabilization
IPC: C09B67/00
Filed: 1974-11-29
Abstract: 1496506 Stabilizing photographic dyes to visible or ultraviolet radiation EASTMAN KODAK CO 29 Nov 1974 [29 Nov 1973] 51832/74 Heading G2C [Also in Divisions C4 C5 and D1] A dye (as defined below) is stabilized to visible or ultraviolet radiation by adding to the dye a chelated-metal quenching compound having its longest wavelength absorption peak bathochromic to the longest wavelength absorption peak of the dye and, in the presence of the dye, providing a quenching efficiency greater than 1À0, the chelatedmetal quenching compound having one of the Formulae:  or in which M is a nickel, cobalt, copper, palladium or platinum atom, X and X<SP>1</SP> are each independently a sulphur or oxygen atom, Cat<SP>+</SP> is a monovalent or polyvalent cation and A represents a group: in which R is a hydrogen atom or an alkyl group and R<SP>1</SP> and R<SP>2</SP> are each independently a hydrogen atom, a phenyl or substitute phenyl group, a nitrile or an alkyl group. The term 'dye' refers to radiation-absorbing compounds which may appear uncoloured or coloured when viewed by the human eye in sunlight i.e. including fluorescent brighteners and dye-forming couplers. The dye may be dissolved in an organic solvent dispersed in a hydrophilic colloid layer and be part of a photographic material e.g. contained in a layer of a photographic colour material which may be a colour transfer colloid transfer material, silver salt diffusion transfer or an imbibition transfer material.
Patent GB-1285029-A (GB)
Title: Improvements in or relating to adjusters for railway brakes
Inventor: WARRALLO ARTHUR JAMES
IPC: F16D55/224
Filed: 1968-10-09
Abstract: 1285029 Brake adjuster GIRLING Ltd 9 Oct 1969 [9 Oct 1968 4 Nov 1968] 47773/68 and 52122/68 Heading F2E An adjuster for braking mechanisms comprises an actuating shaft 17 axially movable within a housing 10 and having a carrier member 27 mounted thereon, relative movement of the carrier member 27 with respect to the housing being limited. The shaft 17 is provided with a series of recesses 23 for co-operation with a locking element 24. In response to excess movement of the shaft relative to the housing 10 caused by brake wear during power brake operation, the locking element 24 is disengaged from its co-operating recess and engaged in the following recess whereby to establish a new datum position for the carrier relative to the shaft. The shaft 17 is actuatable by a handbrake mechanism, the latter acting through the carrier member 27 which in this mode of operation urges the same or further locking element(s) firmly into the same or further recess(es) to prevent relative movement between the shaft and carrier member. In the construction shown, relative movement between the carrier member 27 and the housing 10 is limited by a spring 28 and the shaft 17 is rotatable through a right angle by a lever 36 so that the locking elements 24 are released from the recesses 23 and the adjuster can be reset. The hand-brake mechanism acts on the carrier member 27 through a pair of levers 31, 32. Further adjustment is provided by forming two anchorage points for the securing of one part of a brake capiler in the housing (Fig. 3, not shown). In a further embodiment (Figs. 4, 5, not shown) power actuation is transmitted to the shaft through a strut fixed to the carrier member, the locking elements by which the adjuster is adjusted being housed in a roller housing rigidly fixed to the housing. A further set of locking elements are provided in the carrier member. The push-rod for power actuation may be rigidly connected to the strut (Fig. 6, not shown). In a modification, the locking elements comprise spring- loaded pawls pivoted on the carrier member (Figs. 7, 8, not shown).
Patent GB-1513200-A (GB)
Title: Apparatus for generating frequency modulated acoustic vibrations under water
IPC: H03B11/00
Filed: 1976-12-15
Abstract: 1513200 Underwater telephony EFA ELEKTROFUNKGERATE AG 15 Dec 1976 [17 Dec 1975] 52327/76 Heading G4F In an underwater telephone transmitter two monostable RC multivibrator circuits are interconnected, the microphone electric output is fed into at least one RC circuit to modulate the pulse train frequency, and the modulated pulse train is emitted via a piezo-electric transducer. A pulse-to-sinusoid circuit may precede the transducer. The transducer may be switched to act also as the input transducer of an appropriate receiver.
Patent GB-1103679-A (GB)
Title: Metallo-ceramic compositions
IPC: C23C4/06
Filed: 1966-11-23
Abstract: Copper is protected against thermal oxidation by flame spraying it with a composition consisting of 70-90% Cr3C2 and 10-30% Al.  The composition may be in the form of a loose powder or of a sintered rod and is preferably applied by a plasma torch. The layer so formed may be sprayed with Al2O3; ZrO2 stabilized with CaO, MgO or Y2O3; ThO2; MgO; MgO.  Al2O3; Ca2ZrO3; ZrSiO4.  A further sprayed layer of ZrO2 or Al2O3 may be applied.ALSO:Copper is protected against thermal oxidation by flame spraying it with a composition consisting of 70-90% Cr3C2 and 10-30% Al.  The composition may be in the form of a loose powder or of a sintered rod and is preferably applied by a plasma torch.  The layer so formed may be sprayed with Al2O3; ZrO2 stabilised with CaO, MgO or Y2O3; ThO2; MgO; MgO.Al2O3; Ca2ZrO3; ZrSiO4.  A further sprayed layer of ZrO2 or Al2O3 may be applied.
Patent GB-1490227-A (GB)
Title: Separation of components from a suspension
IPC: B01D21/02
Filed: 1974-12-06
Abstract: 1490227 Flotation apparatus; dispersing gases in liquids PIELKENROOD-VINITEX BV 6 Dec 1974 [22 Dec 1973] 52771/74 Headings B1C B1D and B2H A method of separating suspended material from a suspension comprises reducing the pressure of a pressurized liquid containing gas or a volatile substance to form a dispersion of gas bubbles in the liquid, and introducing the liquid into a tank containing the suspension and forming part of a plate-type separator 7 so that the bubbles become attached to the suspended material and cause it to float. In the embodiment shown the suspension is introduced to a chamber 3 through a duct 11 and a nozzle 12, the latter consisting of a tube having a longitudinal slot. A pump 16 draws in air through a pipe 18 and liquid through a pipe 17 and produces a pressure in a pipe 14. This pressure is suddenly relieved beyond a valve 15 to produce a dispersion of air bubbles in the liquid which is injected into the chamber 3 through a nozzle 13. Floating material passes over a weir 5 into a discharge chamber 6 and sediment is collected in a hopper 10 after passing through an assembly 7 of superposed parallel corrugated plates. In another embodiment, Fig. 3 (not shown) there are separate pumps (16) and (21) for the liquid and air which may be stored under pressure in a mixing vessel (22) before passing through the valve 15. The suspension to be treated and the dispersion of gas bubbles in the liquid may be introduced into the chamber 3 through the same nozzle, and in another modification the suspension itself is pressurized and mixed with air to form the dispersion of gas bubbles. The suspension may be subjected to a coalescence treatment in a device located either inside or outside the chamber 3.
Patent GB-1383786-A (GB)
Title: Telegraph relay
IPC: H04L25/24
Filed: 1972-11-16
Abstract: 1383786 Transistor gating circuit AMF Inc 16 Nov 1972 [1 Dec 1971] 53074/72 Heading H3T An electronic relay having two channels for receiving respective control signals 1, 2, each channel comprising a first oscillator SO1, SO2 controlled by its respective input to actuate a respective output switching circuit DB1, DB2 is characterized by the provision of trigger circuit ST1 and ST2 which are actuated by further respective oscillators BO1, BO2 to enable an associated one of the first oscillators only when the control signal in the channel containing that first oscillator is greater than that in the other channel. Control signals of less than a predetermined magnitude will inhibit both switches. The control signal 2 to the second channel is applied to energize Colpitts oscillator BO1, and the output from the oscillator is rectified by CR4(1) to produce a signal which is applied to trigger circuit QC(1), QD(1) in opposition to the control signal 1 of channel 1. If the signal in the first channel is equal to, or less than that in the second the trigger is set to a state which inhibits Colpitts oscillator QA(1). If on the other hand the signal in the first channel is the greater, the trigger is set to its other state to enable oscillator QA(1). The switching threshold is determined by an inverter stage QE(1). When oscillator QA(1) is energized its output is fed to rectifier CR2(1) to provide a signal which is amplified by Darlington pair QI(1), Q2(1) to provide switching signal for diode bridge BD1 to connect terminals 12C, 12D. Tunnel diodes TDS1 are provided to prevent the output switch from overloading, The oscillators BO2 and ST2 provide a similar function with respect to the oscillator SO2 in the second channel.
Patent GB-1499972-A (GB)
Title: Operating cable and sheath for same
IPC: F16C1/10
Filed: 1976-12-20
Abstract: 1499972 Bowden mechanism SOC ANON DBA 20 Dec 1976 [16 Jan 1976] 53077/76 Heading F2K In a low friction Bowden cable, for a motorvehicle handbrake or clutch &c., the sheath 12 and core 10 slidably co-operate by way of surfaces 20 and 16, of which one is formed of or coated with polyamide and the other is formed of or coated with polypropylene. As shown, the core 10 may be of corrosion resistant steel, galvanized steel or ordinary steel coated with a layer 14 of polypropylene forming the surface 16. The sheath 12 has a polyamide slide tube 18 the inside of which forms the surface 20, the polyamide being of the 6À6 or 6À10 type, the tube 18 being arranged within a flat-wire coil casing 22 covered by an outer protective thermoplastics layer 24. Alternatively, the core may be coated with polyamide and the inner surface of the sheath coated with polypropylene, and in this case the polypropylene may be advantageously reinforced with glass fibres. A silicone grease may be provided between the surfaces 16, 20.
Patent GB-1246106-A (GB)
Title: Vending machines
Inventor: TYLER JOHN DRAYCOTT
IPC: G07F11/62
Filed: 1968-11-08
Abstract: 1,246,106. Coin-freed apparatus. MEGGITT ENG. Ltd. 20 Nov., 1969 [8 Nov., 1968], No. 53083/68. Heading G4V. A vending machine, e.g. for cans of oil, comprises a stationary circular holder 3 having a plurality of article stations about its periphery, a rotatable circular cover 8 co-operating with the holder to normally prevent removal of an article, a latch mechanism 17 to normally lock the cover against rotation, and a coin-freed mechanism for freeing the latch mechanism to permit rotation of the cover to align an aperture 36 in the cover with the next article to be vended, the article being removed by hand. The latch mechanism comprises spring-loaded forward and reverse latches 18, 20, pivoted on a plate 22 depending from the cover, and a spring- loaded latch 19 mounted on the latch 18. The latches co-operate with pegs 15 having inner cam surfaces 16 and spaced around the holder 3 in alignment with the article stations. The latch 20 supports a coin shoot 28 beneath a coin testing unit 11. A finger 31 pivoted on the coin shoot has a stop 30 extending through a slot into the coin shoot. In operation, a coin passes down the shoot, deflecting finger 31 momentarily, and comes to rest on a cam surface 16. Forward movement of the cover, moves the coin up the cam surface to lift finger 31 and raise the latch 20 clear of the peg. The cover has a transparent skirt 9 and an aperture 37 closed by a member 38 through which an official releases the latch mechanism to facilitate re-filling the apparatus. The apparatus may be arranged about a horizontal axis rather than vertical axis as illustrated.