baber/WOPTO huggingface dataset:
Patent GB-1519225-A (GB)
Title: Lamp power supply using a dc regulator and a commutator
IPC: H05B41/24
Filed: 1975-09-17
Abstract: 1519225 Automatic control of power M B LESKIN 17 Sept 1975 [19 May 1975] 38192/75 Heading G3R An AC load is energized from a DC source by way of a regulator and a commutator. The current and voltage from the regulator are sensed and used to control the regulator so that the load receives approximately constant power.  As shown in Fig. 1, AC input terminals 21,22 supply power through a rectifier bridge 20, switching transistor 30 and sensing circuit 26 to lines 13, 14 which connect to a commutator 12, Fig. 2 (not shown), comprising two pairs of transistors or thyristors which are made alternately conducting so as to supply current of alternating polarity to a metal halide discharge lamp (11). In the sensing circuit 26, an operational amplifier 37 receives one signal over resistors 52, 53 representing the DC output voltage, and another signal from a resistor 35 through a resistor 40 representing output current. A Zener diode 43 and potentiometer 46 supply a reference voltage, and the resulting output of the amplifier 37 is approximately proportional to the output power. After further amplificaton 54, the power signal is compared in an amplifier 57 with a high frequency triangular wave from an oscillator 27 to form a width modulated square wave signal which is amplified in a drive circuit 29 used to control the switching of regulator transistor 30. When the discharge lamp is first switched on, it operates at low voltage and high current, so that a Zener diode 109 in the sensing circuit 26 remains blocked and the current is allowed to rise to a high value. When the lamp warms up, the voltage rises and the Zener 109 breaks down, changing the response of the sensing circuit for normal operation. The lamp is started by a separate spark gap ignition circuit (101), Fig. 2 (not shown).
Patent GB-1119702-A (GB)
Title: Fertilizers
Inventor: CHAPPELL DAVID CHARLES
IPC: C05C1/02
Filed: 1964-09-19
Abstract: A granular ammonium nitrate or ammonium sulphate nitrate contains 0.1 to 5.0% by weight, based on the total weight of the composition, of aluminium hydroxide or a basic aluminium salt uniformly distributed within the granules. The material is prepared by feeding to a rotary granulator, a solid ammonium salt (ammonium sulphate or nitrate) a water-soluble aluminium salt (e.g. sulphate or nitrate), an aqueous solution of ammonium nitrate containing less than 20% by weight of water, recycle material (fines less than the product size of from 1.0-3.5 mm.s. and ground oversize) at an elevated temperature, and anhydrous ammonia, granulating the mixture at a temperature above 50 DEG  C. and drying the granules, the amount of ammonia added being such that the pH of a 10% solution (by weight) of the granules in water is in the range 4.5-5.0.
Patent GB-862144-A (GB)
Title: Electrical apparatus
IPC: F02C7/32
Filed: 1958-12-01
Abstract: 862,144. Electric igniters. BENDIX CORPORATION. Dec. 1, 1958 [Dec. 26, 1957], No. 38701/58. Class 75 (3). A unit adapted to be mounted on a jet engine and to support resistors 33, condensers 37, filters 35, transformers 36, rectifiers 40 and control gap housings 45 forming an igniter for igniting the burner of the engine, comprises two spaced parallel end members 11, 12, two inwardly extending brackets 22, 24 secured to each of the end members 11, 12, and four longitudinally extending frame members 32 connected to the brackets by resilient, members 34. The frame members 32 are of L section. The resilient members 34 are narrow straps and are welded to vertical faces of the frame members and the brackets. The resistors filters &c. are supported on the frame members 32. The assembled unit is telescoped into a cylindrical housing 14, the end members 11, 12 forming end closures for the housing. The space between the housing and the enclosed unit is filled with heat insulating material. Electrical terminals 19, 20, 21 are attached to the end members 11, 12 Specification 849,854 is referred to.
Patent GB-1122668-A (GB)
Title: Improvements in or relating to remote controlled guiding arrangements
IPC: G05B19/39
Filed: 1965-09-14
Abstract: 1,122,668. Measuring position photoelectrically. SKODA OBOROVY PODNIK. Sept. 14, 1965 [Sept. 21, 1964], No. 39138/65. Heading G1A. A system for locating a machine includes a high speed motor for coarse control energized by a selsyn system and a low speed motor for fine control energized by a photo-electric system including a mirror mark on a target and a transparent prism having mirror surfaces co-operating with photo-electric transducers. A bridge circuit comprising a selsyn transmitting the actual position of the machine and a selsyn set in accordance with a desired position of the machine provides a coarse error signal which energizes a first motor to drive the machine through a high gear. When the error signal falls to a preset level, a second motor driving through a lower gear is brought into use together with a fine error signal derived from the photo-electric system. The photo-electric system comprises a mirror 28 carrying cross-hairs fixed in the desired position of the machine. Attached to the machine is a unit comprising a lamp 20 illuminating the mirror 28 via a semi-transparent mirror 22 and a prism 29. Prism 29 has faces 30 which reflect light from mirror 28 to photo-cells 31a 31b connected in a bridge circuit to provide the fine error signal. Observation of the position of the crosshairs on mirror 28 relative to cross-hairs on mirror 28 may be had via an eye-piece 26 or a television camera 27. Two more photo-cells 31c, 31d may be used in a similar system to locate the machine in another co-ordinate.
Patent GB-959358-A (GB)
Title: Production of urea prills of low biuret content
IPC: C05C9/00
Filed: 1962-10-17
Abstract: Urea prills of low buiret content are produced by providing a substantially anhydrous melt containing less than 0.5% by weight of water and between 0.5% and 1.5% by weight of buiret, the balance being urea, treating said melt in a conversion zone maintained under an ammonia pressure between 10 and 100 atmospheres at a temperature between 272 DEG F. and 375 DEG F. for a period of time sufficient to achieve substantial equilibrium between said ammonia, buiret and urea thereby obtaining a melt containing between 0.1% and 0.5% by weight of buiret, and passing the low-buiret melt thus obtained to a prilling zone for producing the prills.  The ammonia may be provided by contacting the melt with an ammonia-containing gas or with any ammonia-bearing substance which decomposes to provide free ammonia under the conditions obtaining in the reaction zone. The urea is generally prepared by the reaction of ammonia with carbon dioxide under elevated temperatures and pressures.
Patent GB-1180994-A (GB)
Title: Dye Dispersions for Forming Antihalation Layers
Inventor: WILSON BURTON DAVID
IPC: G03C1/83
Filed: 1967-08-25
Abstract: 1,180,994. Gelatine compositions. EASTMAN KODAK CO. 25 Aug., 1967 [29 Aug., 1966], No. 39261/67. Heading C3H. [Also in  Division G2] Gelatine compositions comprise a dispersion of a solution in an aromatic alcohol of a dye of the formula wherein R 1 -R 4  are alkyl or substituted alkyl groups, in gelatine. Specified aromatic alcohols are benzyl alcohol, a xylyl alcohol, a tolyl alcohol, a trimethyl phenyl alcohol, a phenylene dicarbinol, mellityl alcohol, #-phenyl ethyl alcohol, p-isopropyl benzyl alcohol and anisyl alcohol.
Patent GB-1302455-A (GB)
IPC: B62K3/12
Filed: 1970-08-14
Abstract: 1302455 Collapsible bicycle; pipe and rod couplings J A COGLIANO 14 Aug 1970 [14 Aug 1969] 39296/70 Heading B7E [Also in Division F2] A bicycle comprises a plurality of portions (segments D, E and F), each being connectable to the adjacent portion by the engagement of a lower male attachment 1036 and a lower female attachment 1076 (see Fig. 2) and the engagement of upper attachment means 1044, 1052 (see Fig. 3) which are connectable when the lower male attachment is rotated in the lower female attachment. The lower attachment means of Fig. 2 can be replaced by that of Fig. 7 (not shown), in which ring 1152 forms an annular space around and adjacent to one end of a housing 1124, cross-member 1144 fitting into the annular space. In Figs 10 and 11 (not shown) is an alternative lower attachment means. In Figs. 5 and 6 (not shown) is gearing that can be used to transmit drive from the pedals to the rear wheel, the arrangement allowing segment E to be used with segments D and F or segment E to be omitted.
Patent GB-1400042-A (GB)
Title: Transceiver apparatus for use with a telephone handset to  enable a deaf-mute to communicate by telephone
IPC: G09B21/00
Filed: 1972-08-23
Abstract: 1400042 Substation equipment B FRACASSI 23 Aug 1972 [30 Aug 1971 21 Oct 1971] 39312/72 Headings H4K and H4J An acoustical coupler comprises a pen recorder which is effective to provide a visual indication of acoustic signals incoming to and outgoing from the station thereby rendering it useable by a deaf and/or dumb person. Outgoing signals are generated by a buzzer feeding a loudspeaker 11 coupled to a handset mouthpiece in response to actuation of a key 9. Incoming signals are picked up by an electromagnetic insert 5 and amplified prior to application to the recorder 22/24. It is suggested that outgoing and incoming signals can be distinguished on the recorder by utilizing different printing levels or different inks, a switch being operated to effect the change over. A lamp 12 may be illuminated in sympathy with the incoming/outgoing signals.
Patent GB-924499-A (GB)
Title: Amplifier for two-channel transmission
IPC: H04S3/00
Filed: 1959-11-20
Abstract: 924,499. Stereophonic systems. STANDARD TELEPHONES & CABLES Ltd. Nov. 20, 1959 [Nov. 27, 1958], No. 39442/59. Drawings to Specification. Class 40 (4). In a two-channel stereophonic reproduction system the low frequency currents are extracted at the output stage of each channel of a twochannel amplifier and are fed via respective low-pass filters to the audio-frequency stage(s) of a radio set, a television set, or a radiogramophone, the loudspeaker(s) of which reproduce the low frequencies in respect of both channels.
Patent GB-1314228-A (GB)
Title: Hydraulic brake systems for powered vehicles
IPC: B60T11/18
Filed: 1970-08-18
Abstract: 1314228 Fluid pressure brakes AISIN SEIKI KK 18 Aug 1970 [26 Aug 1969] 39672/70 Heading F2F A pressure control device for an hydraulic braking system including a control valve assembly 20 connected to wheel cylinder 27 and to a circuit including an accumulator 16 charged by a pump 10 from a reservoir 11 provides, an application of the brakes, a first passage for fluid from the accumulator to a wheel cylinder via a port 21 a ring groove 42 and radial passages 44 in a piston 41 and axial bores 43, 69 and port 25, and on release of the brakes a second passage from the wheel cylinder to the reservoir via pipe 54, port 31 passage 50 and port 23 return flow along the first passage being prevented. (For Figure see next page.)
Patent GB-1189325-A (GB)
Title: Phosthetic Implant Joints
IPC: A61F2/32
Filed: 1967-08-31
Abstract: 1,189,325. Surgical prostheses. SULZER BROS. Ltd. 31 Aug., 1967 [2 Sept., 1966], No. 39838/67. Heading A5R. In an implant joint prosthesis comprising a first joint member (for mounting on a first natural bone or remnant thereof) within which is adapted to be mounted a second joint member (for mounting on a second natural bone or remnant thereof), one joint member carries on the surface thereof which faces the other joint member at least one resiliently compressible sliding member which is constructed to slide on a sliding surface of the other joint member as the joint moves and which, in the unloaded state of the joint, maintains the surface of the one joint member spaced from the opposed sliding surface of the other joint member. Figure 1 illustrates the ball and socket of a prosthetic hip joint. The ball comprises a part spherical head I which is integral with a neck 2 having a base surface 3 which is adapted to abut the end face of the remaining part of the natural femur and from which projects a stem 4 adapted to be cemented into the shaft of the femur. The ball is adapted to fit in a dished socket 5 which is cup-shaped and reinforced by ribs 6 and which is adapted to be cemented into the hip bone; if desired, the socket may have an integral stem adapted to extend into and to be cemented into a bore formed in the hip bone. Spaced symmetrically in the inner face 7 of the socket are three circular flat recesses 8 in each of which is inserted a circular disc-shaped sliding member 9 made of a biologically compatible synthetic plastics material, for example polyethylene, which can be compressed sufficiently for the spherical sliding surface of the head of the ball to bear against those parts of the inner face of the socket which lie outside the recesses. The three sliding members illustrated may be replaced by a single sliding member constructed for example as a ring or spiral. Either or both of the joint members may be made of a metal alloy, a preferred alloy consisting of chromium, molybdenum and cobalt in the proportions 30:7:58, respectively, (by weight). Figure 3 (not shown) illustrates a prosthetic hip joint for use when the head of the femur, except for surface cartilage, is intact, the part spherical ball, neck and base surface being replaced by a part spherical cup-shaped capping which is adapted to cover the cartilagefree head of the femur and from which projects an integral stem adapted to be cemented into the shaft of the femur. The joint members of the prosthesis may have cooperating surfaces which are part cylindrical instead of part spherical thereby to provide an elbow or knee joint prosthesis.
Patent GB-1368367-A (GB)
Title: Terrainfollowing radar system
IPC: G01S13/935
Filed: 1972-08-29
Abstract: 1368367 Terrain avoidance systems ROCKWELL INTERNATIONAL CORP 29 Aug 1972 [12 Oct 1971] 40056/72 Heading H4D A pulse terrain-following system for use in aircraft comprises a device for discriminating reflections due to discrete objects from background noise and the device includes means for averaging a sampled signal over n repetition periods to provide an avoidance manoeuvre signal, means to determine whether the sampled signal has the same value at least M times in the n samples and logic means responsive to such a determination to substitute that same value for the averaged signal as the warning signal. A multiple feed antenna 11, Fig. 1, under control of a pulse transmitter 10 and servo 12 provides signals to a monopulse receiver 13 which in turn produces sum, # and difference, # signals 17, 18. A boresight gate generator 14 produces an output # 0  under the following conditions (1) # greater than a predetermined threshold (2) # less than a predetermined threshold (3) #<#. These conditions are determined by comparators whose outputs feed a coincidence gate which is enabled by a range gate signal. A bi-stable reset by the transmitter trigger is used to hold the # 0  output against further triggering by more distant targets. The # 0  gate indicates a target of interest on the radar boresight at the range of interest. The signal is passed to a terrain following computer 15 (Fig. 6, not shown) wherein the reference flight profile is sampled by the # 0  gate to produce a change of flight signal #γ (e.g. fly up/fly down). This signal is passed to a processing stage, Fig. 10, where the "worst manoeuvre" is selected for passing on to the display or flight control. In the described embodiment the radar transmits a series of n pulses each having a different carrier frequency. The #γ signals are fed to sample and holds 40 1 - 40 n , Fig. 10, such that the last n samples are stored. These are averaged in summing amplifier 41 and the average signal is fed via analogue switch 50 to the output 53. It is stated that on encountering a discrete object, e.g. a tower, M of the n samples will have an equal value and this value is used as the warning signal. Over a single repetition period a generator 43 produces a decreasing reference voltage 44 fed to n comparators 47 1 -47 n  each of which is fed with the output from one of the sample and holds 40 1 -40 n . Detector 48 detects whether at any instant M of the comparator outputs are present, if so output 49 becomes TRUE which stops the threshold scan and enables gate 52. If the threshold value B is detected as being greater than the time averaged value A by detector 45, analogue switch 50 operates and connects the threshold value B to the output 53. Thus at any instant the flight control utilizes the "worst manoeuvre" signal smoothed over a period of time, whether this derives from general clutter or from discrete objects. Specification 1,368,368 is referred to.
Patent GB-1443735-A (GB)
Title: Production of substitute natural gas
IPC: C07C4/06
Filed: 1973-08-24
Abstract: 1443735 Production of methane RALPH M PARSONS CO 24 Aug 1973 [8 Sept 1972] 40290/73 Heading C5E Substitute natural gas is produced by a process in which (i) a supply of high pressure steam from the process is used to liquefy air and prepare a stream of high pressure gaseous oxygen, (ii) an initial gas stream containing hydrogen, oxides of carbon, methane and carbon is produced by reacting a carbonaceous feed with the gaseous oxygen and steam, (iii) carbon is separated from the initial gas stream, (iv) the carbon-free gas is passed through at least one wet methanation reaction zone containing a catalyst comprising 5-35% by weight of metallic Fe, Co or Ni on an alumina and/or silica support, (v) the methanation product is cooled to produce high pressure steam, and (vi) water and any residual carbon dioxide are separated from the gas. The carbonaceous feed can be a distillation residue. Fig. 1A illustrates a process in which, following the removal of carbon, the gas is passed to water gas shift reaction and after the separation of water following the wet methanation the gas is subjected to a dry methanation in which a catalyst containing more than 30% by weight of metallic Fe, Co or Ni is used. Fig. 1B (not shown) illustrates a process similar to that of Fig. 1A but in which a portion of the carbonfree gas is passed through an initial water gas shift reactor followed by a carbon dioxide removal stage. Figs. 1C and 1D (not shown) illustrate processes corresponding to Figs. 1A and 1B except that the partial oxidation reaction is followed by a carburetion stage in which an intermediate hydrocarbon (e.g. naphtha, gasoline, kerosene or gas oil) and high-pressure steam are reacted with the gas stream to produce additional methane, hydrogen and carbon oxides. Fig. IF illustrates a process similar to that of Fig. 1D but in which a portion of the hydrogen stream from the initial water-gas shift reaction is passed into the carburetion stage.
Patent GB-1011049-A (GB)
Title: A process for thermal stabilization of polyoxymethylene
IPC: C08G2/00
Filed: 1963-10-11
Abstract: Polyoxymethylene is heat-stabilized by acylating in the presence of acylating catalyst a polyoxymethylene with an aldehydedicarboxylate of formula <FORM:1011049/C3/1> where R, R1 and R11 are the same or different organic radicals.  The polyoxymethylene may be a formaldehyde or trioxane-homopolymer or copolymer of trioxane with dioxolane, dioxepane or styrene.  Specified dicarboxylates include benzylidene diacetate, dibutylate and dibenzoate, and furfurylidene diacetate, dibutylate and dibenzoate.  There may also be present in the acylating mixture a carbodiimide, an isocyanate, an isthiocyanate, cyanamide, an epoxy compound, a vinyl ester, a vinyl ether or a thiovinyl ether.  Long lists of known acylating catalysts are given.  Specifications 770,717, 848,669, 868,365, 875,560, 877,256, and 894,439 are referred to.
Patent GB-1281159-A (GB)
Title: Improvements in or relating to ribbon spools
IPC: B65H75/14
Filed: 1970-08-21
Abstract: 1281159 Ribbon spools NATIONAL CASH REGISTER CO 21 Aug 1970 [27 Aug 1969] 40401/70 Heading B8M [Also in Division B6] A ribbon spool comprises a tubular member 20 enclosing a core member 40 formed with studs, as at 48, accessible from the exterior of the tubular member and loosely supported therein so that when ribbon 36 is inserted through a longitudinal slot 38 into the tubular member around the core and subsequently tensioned, the ribbon is gripped within the tubular member by the core. The core is cylindrical in form apart from a flat surface 46, and on rotation is clamped between the interior surface of the tubular member at 61 and an inwardly directed flange 42. The studs, which are located in circumferential slots (52, 54) restrict the rotation of the core 40 and prevent axial movement thereof. The ribbon is releasable by using the studs to rotate the core. The tubular member may be of metal and the core member of plastics material.
Patent GB-1118978-A (GB)
Title: Safety operating system for cranes with telescopic jibs
IPC: B66C13/18
Filed: 1966-09-13
Abstract: 1,118,978. Cranes with telescopic jibs. JEFFREY GALION MFG. CO. 13 Sept., 1966 [15 Sept., 1965], No. 40949/66. Heading B8B. When the hoisting rope 26 of a jib crane becomes taut, due to a lifting block 30 abutting the end of the jib when the jib is telescopically extended, a winch brake is disengaged so that the winch may be rotated by the pull of the hoisting rope, thereby preventing damage to the crane. At the same time that hydraulic fluid is supplied to rams 21a, 21b to extend the jib it is also supplied through a pilot line to the winch brake to release it. As the winch is turned by the pull on the hoist line, fluid is pumped through a relief valve which normally remains closed because it is set to a higher pressure than the normal relief valve for the crane.
Patent GB-1497443-A (GB)
Title: Pivotable arm rest for a seat
IPC: B60N2/75
Filed: 1975-10-07
Abstract: 1497443 Armrests; securing upholstery DAIMLER-BENZ AG 7 Oct 1975 [12 Oct 1974] 41059/75 Heading A4J and A4M The two end positions of a vehicle seat armrest which is pivotally mounted on a shaft 7 fixed to an adjustable seat back 3 are defined by two pins 12, 13 on the armrest engaging the ends of two slots 10, 11 formed in a stop plate 9 secured to the shaft. A frictional force produced by compression springs 17 on the pins and transmitted to the stop plate by friction discs 18 has to be overcome in order to move the armrest between the two end positions. Adjustment of nuts on the outer ends of the pins adjusts the frictional force. The armrest may comprise polyurethane foam enclosed in a material cover and having an opening 20 through which the shaft extends, a barbed ring 22 covering the opening and securing the material cover in position.
Patent GB-1394761-A (GB)
Title: Electrical contact arrangement and element
IPC: H01R4/30
Filed: 1973-09-03
Abstract: 1394761 Electric couplings MULTI-CONTACT AG 3 Sept 1973 [1 Sept 1972] 41354/73 Heading H2E Slits 6 divide a contact element 4 into lamellae 5 joined by borders 7. The lamellae 5 are twisted out of the general plane of the element 4. The borders 7 are folded back on themselves as shown, corrugated (Fig. 3, not shown) or otherwise puckered in order to shorten them and thus increase the number of lamellae 5 per unit length of the element 5. Elements 4 are used to connect two bodies, for example bus-bars (2, 3, Fig. 1, not shown).