baber/WOPTO huggingface dataset:
Patent GB-1441956-A (GB)
Title: Full wave rectifying control circuit with firing angle retar dation control
IPC: H02P7/292
Filed: 1973-08-15
Abstract: 1441956 Speed control of D.C. motors; rectifying KOLLMORGEN CORP 15 Aug 1973 [9 March 1973] 39458/73 Headings H2F and H2J A control circuit for a D.C. motor provides power from an A.C. source and comprises a gated rectifying network which is rendered conductive by firing pulses, a pulse generator which supplies pulses to the network, means to supply the pulse generator with an error signal indicative of the difference between the actual and desired motor speed, and means in the generator responsive to the error signal to provide firing pulses to the gated network at varying times during a timing signal, and means providing the timing signal referenced to the A.C. supply and comprising a capacitor network connected to the input of the pulse generator which effectively stretches the positive portion of the input A.C. waveform to greater than 180 degrees. Referring to Fig. 2, the A.C. supply is applied via a centre-tapped transformer 2-4 through thyristors 5-8 to the motor 9, 10. The pair 5, 7 of thyristors supplies driving current to the motor and the pair 6, 8 when gated conduct reverse current back to the source. Each thyristor 5-8 is controlled by a circuit as shown in Fig. 4 which depicts a "forward" pulse generator for one of the thyristors 5, 7 and a second "reverse" generator for one of the thyristors 6, 8. Considering the "forward" generator, a timing network of capacitors 16-18 and diodes 14, 15 connected to the input A.C. source stretches the positive portion and enables transistor 23 to develop the timing signal. A ramp signal generator including capacitor 27 and transistor 28 is connected to the anode input of a P.U.T. 29 and the gate input thereof is connected with the speed error signal when transistor 23 is off, transistor 26 will conduct and short out the capacitor 27 causing the P.U.T. 29 to be held off, however during the timing signal capacitor 27 will charge until the anode voltage at P.U.T. 29 is greater than the gate voltage whereupon the device will fire and develop a thyristor triggering pulse via transformer 13. The operation of the "reverse" channel is similar but works on the negative parts of the input waveform. The system takes into account the time displacement of polarity reversals across the rectifying S.C.R.s 5-8 owing to reverse e.m.f. generated by the motor and the extension of the timing signal enables a reduction in the minimum conducting time of a gated S.C.R.
Patent GB-1057118-A (GB)
Title: Yarn handling device
IPC: D01H1/40
Filed: 1965-09-16
Abstract: In a device for holding yarn under adjustable tension to facilitate stringing-up, comprising a housing having a passage with a fluid-jet for advancing the yarn through the passage under tension, at least one roller is located in the passage to engage the yarn and impart to it additional tension.  In Fig. 12, (not shown) a housing (212) carries a tube (214) in the bore of which is a concentric tube (204) and a nozzle (216).  The other end of the tube (214) is connected to a source of fluid under pressure, which travelling past the nozzle to an outlet (220) through the annular space between the tubes (214, 204) creates reduced pressure on the far side of the nozzle which communicates with a tube (210).  When this is applied to a yarn end it is drawn through the tube (210), the nozzle and tube (204) to a waste container.  If it is desired to increase the tension on the yarn a roller (208) in the housing is made accessible by sliding the tube (210) off a seat (224).  This roller is rotated by a fluid motor driven by the output from tube (220) and the yarn is wrapped around it and the tube (210) restored to its seating.  In another form, the housing has two rollers mounted on a plate which can be rotated to vary the extent to which the yarn wraps the rollers.  Figs. 9, 10, (not shown).  The housing, Fig. 4, (not shown) contains a tube (58) at the level of the rollers which are carried by the cover (62) of the housing; one end of the tube is applied to the yarn end, and the other is subjected to reduced pressure when it engages a seating (72) on a nozzle (24) so that the yarn is drawn through the tube and housing to waste.  The tube can be slid to the right by a handle (74) moving in a fixed track (76) parallel to the tube; at the same time, a button (78) on the tube engages a cam-track on the cover (62) of the housing to rotate the cover and bring the rollers to positions where they are wrapped by the yarn to an extent determined by which of a series of notches (122) the button is made to engage.
Patent GB-869791-A (GB)
Title: Material deposition process employing a collimated electric arc
IPC: C23C4/12
Filed: 1957-12-23
Abstract: 869,791. Spraying fusible materials. UNION CARBIDE CORPORATION. Dec. 23, 1957 [Dec. 31, 1956 (2)], No. 39807/57. Class 69 (3). [Also in Groups II and III] In a process for depositing material on the surface of a workpiece an electric arc is formed between a stick electrode and a second electrode, a gas stream is passed in contact with the stick electrode, the gas stream containing the arc vapours is passed through constricting means to form a collimated arc flame which flame, together with powdered coating material, is directed on to the surface of the workpiece. As shown, arc 40 is formed between stick electrode 16 and torch body 10, powdercarrying gas stream entering the torch through inlet 38 and being heated and propelled through constricted orifice 14 to deposit the powder as coating 42 on workpiece 44. In alternative embodiments, (a) the workpiece is included in the arc circuit, (b) two gas streams are used, one to envelop the arc and the other to carry the powder, (c) an electrode which is separate from the torch body and the workpiece and which is provided with a constricted orifice is used as the second electrode, and (d) a hollow stick electrode is used through which the powder is introduced into the arc. Coating materials which may be used are metals and metal borides, carbides, oxides and silicides. The gas may be inert, oxidizing, reducing, carbonizing or nitriding.
Patent GB-1313376-A (GB)
Title: Start-finish mechanism for racing game
IPC: A63H18/02
Filed: 1970-08-19
Abstract: 1313376 Toy start and finish gates IDEAL TOY CORP 19 Aug 1970 [22 Oct 1969] 39876/ 70 Heading A6S A toy starting and finishing gate 12 for use in a racing game comprises a track body 30 including first and second lane sections 40, 42 to be traversed by toy cars C, first and second gates 56, 58 movably mounted on the track body 30 in operative relation to the lanes 40, 42, said gates 56, 58 being movable in unison between a lane-blocking position and a laneclearing position and a finish indicator 68 comprising sensors 100, 102 mounted on the track body 30 in operative relation to the lanes 40, 42, the sensors 100, 102 being independently movable in response to the passage of cars along the lanes and providing actuating means for the signals of the finish indicator 68. The finish indicator 68 may include a housing 76 mounted on a stanchion 70 and a signal member 78 therein which may swing in a plane transverse to those of the lanes 40, 42. The track body 30 may include a crossover section, i.e. involving lanes 46, 44 and lane switching members 114, 116 alternately operable, in response to the passage of cars between positions where cars are diverted straight along the lanes 40 or 42 or along cross-over lanes 46, 44. When the gates 56, 58 are in the lane blocking position, the lane switching members 114, 116 are in the same relative position and the sensors 100, 102 are in operative relation to the finish indicator 68. When the members 56, 58 are in the laneclearing position both the lane switching members 114, 116 and the sensors 100, 102 are in inoperative relation.
Patent GB-860914-A (GB)
Title: Tubing hanger assembly
IPC: E21B33/043
Filed: 1959-11-27
Abstract: 860,914. Oil wells. OIL CENTER TOOL CO. Nov. 27,1959 (Aug. 19,1959], no: 40362/59. Class 85. A tubing hanger assembly, more particularly for use in an underwater well installation where it may be manipulated, for locking and unlocking, without the services of a diver, comprises a tubular hangersupport locked within a casing head, a tubing hanger attached to the upper end of the tubing string, and means for releasably locking the hanger within the support. In Fig. 4, the tubular hanger-support 12 is slidably received in the casing head 16, a sleeve 20, spaced from the skirt 18 of the support 12 to accommodate an annular cam 46, being secured, with intervening packing 24, by screws 32 to the support 12. When the support 12 is lowered into the casing head 16, locking dogs 42 are held radially retracted by shear pins 45, the cam 46 being beneath the dogs and the abutment ring 56 for the springs 52 being anchored by shear pins 58. When the ring 56 lands on the shoulder 170, the pins 58 are sheared and the ring is moved up to the position shown in Fig. 4 in which it is held by spring-pressed slips 59. The upward force thrusts the cam face 48 past the dogs, shears the pins 45 and moves the dogs into circumferentially spaced locking recesses 40. The hanger-support 12 has cylindrical bore portions 60, 62, 64, 66, 68 of diameters decreasing downwardly, the cylindrical parts being joined by tapers 70, 72, 74, 76. A seal carrier 80, with seal 92, is insertable in the support 12, being positioned by radial lugs 84 which engage J-slots 86 in the cylindrical wall part 66, the seal carrier being manipulated by a removable tool which engages J-slots 88 in the inner wall of the carrier. The tubing string 152 is wiped by the seal 92 as it is lowered therethrough, the string being attached to a sub 150 which is attached to a tubing hanger 100. The hanger 100 lands on the tapers 70, 72, locking lugs 120 then being forced into an annular groove 122 in the support 12 by springs 128. If it is necessary to raise the tubing string, a back pressure valve is installed in the locking groove 156 of the sub 150, and a pump-through type back pressure valve is installed in the locking groove 158 of a slide valve 146 held against axial movement in the bore 142 of the tubing hanger 100 by a shear pin 149. The upper back pressure valve is then picked up, in known manner, to shear the pin 149 and to lift the valve 146 to admit pressure pumped to the space between the back pressure valves to a passage 144 leading to the back of a piston 123 on each locking lug 120. The lugs are thus withdrawn against the force of the springs 128 and the hanger 100 is withdrawable, with the sub and tubing-string, from the support 12. In a modification, the fluid-actuated lugs 120 are replaced by lugs fixed radially on the hanger 100, the lugs engaging J-slots in the support 12. A well tool is engaged with the upper end of the hanger 100 for manipulating the hanger in, or out of, the J-slots.
Patent GB-996083-A (GB)
Title: Improvements in or relating to optical apparatus
IPC: G02F1/17
Filed: 1962-10-29
Abstract: 996,083. Light - modulating apparatus. INTERNATIONAL BUSINESS MACHINES CORPORATION. Oct. 29, 1962 [Nov. 15, 1961], No. 40718/62. Heading H4F. Optical apparatus comprises (according to one aspect of the invention, Fig. 3) a source 20, 22, 24 for providing a beam 23 of monochromatic light, a light transmitting prism composed of a material of which the refractive index can be varied by applying an electric field to the material, the prism having two convergent faces which receive and transmit the light and to which are secured light-transmitting electrodes 44, 46 for applying an electric field and a photo-electric cell 28 in association with an apertured member 48 for indicating the extent of refraction of the beam 40 transmitted by the prism. According to another aspect of the invention, Fig. 4, the material 60 is in the form of sheet with light-transmitting electrodes 64, 66 on opposite faces, one electrode 64 being in the form of stripes so the refractive index may be varied in separate parallel elongated portions 68. With this arrangement the apparatus is arranged to function as a diffraction grating. Resulting deflection of a light beam is detected as in Fig. 3 by a photo-electric cell in association with an apertured member. The Specification lists suitable materials for use in the invention and discusses the theory of operation. Specification 996,084 is referred to.
Patent GB-873450-A (GB)
Title: Improvements in or relating to method of making a decorative article and the articleproduced thereby
IPC: C25D11/04
Filed: 1959-12-01
Abstract: 873,450. Ornamenting. FROMSON, H. A. Dec. 1, 1959, No. 40812/59. Class 93. A decorative surface incorporating, areas of different light-reflectivity is produced by combining two pieces of aluminium of different compositions selected to exhibit different reflectivity after anodizing into a single unit having a substantially smooth composite surface having exposed areas of each piece, and then anodizing and sealing the composite surface. One piece may be a pattern piece of lesser surface area than the other piece. Materials referred to are aluminium of 9.99% purity, alloys containing 98% aluminium and 2 % magnesium and containing 99% aluminium and 1 % copper, and aluminium containing iron, manganese, or silicon as impurities or alloying agents. The larger piece of aluminium is preferably that having the lower degree of reflectivity after anodizing. Short pieces of rod or wire of the one aluminium material may be pressed in a desired pattern arrangement into a hot slab of the other aluminium material and the resulting unit reduced to its final thickness by rolling or by extrusion. In the latter case, marbled effects are produced in the final product. The composite material is cleaned in an alkaline solution or by brushing, or treated in a standard brightening bath, and is then anodized and sealed. The anodized material may be dyed, e.g. to a gold colour. As shown, two grooves 2, 3 are milled in a slab 1 of 2S aluminium alloy, and two strips 4, 5 of 99.99% aluminium are fitted into the grooves. The composite slab is hot rolled at 600-700‹F. and then cold rolled to the desired thickness, and is then cut into panel lengths, treated in a brightening bath, rinsed, anodized, dyed, rinsed, and sealed. The two materials may be of the same area, and, after reduction of the compositematerial to the desired thickness, portions of one of the layers are etched or machined away.
Patent GB-1113243-A (GB)
Title: Cookers
Inventor: SWAIN BRIAN TREVOR
IPC: F24C15/02
Filed: 1963-10-18
Abstract: 1,113,243. Hinged doors; releasable fastenings. PARKINSON COWAN Ltd. 30 Nov., 1964 [18 Oct., 1963], No. 41170/63. Headings E2A, E2F and E2M. [Also in Division F4] An oven or other hinged cooker door 10 is detachably mounted on two spaced apart links 14 (only one shown) hinged at one end 11 about a hinge axis to hangers 12 mounted on the door frame 13, each link having spaced from said end a pin 19 which releasably engages a slot 20 in the door, together with a further releasable engagement between the link ends. This releasable engagement comprises a pin 21 which engages the limbs 25 and 26 of a pivoted jaw 22 which moves between "tripped" Fig. 2 and "loaded" Fig. 3 (not shown) positions with the aid of a spring 24. To detach the door from its mountings it is swung to the partially open positions of Fig. 2, and a detent 18 mounted on a spring counter balance quadrant 15 is engaged with the door frame, a force is then applied to the top edge of the door in a direction towards the frame, whereby the jaw will then move from the tripped to the loaded position Fig. 3 (not shown), the bottom edge of the door swinging from the links 14. The door may then be lifted off the pins 19. In a modification the positions of the jaw 22 and pin 21 may be interchanged.
Patent GB-1189861-A (GB)
Title: Security Communications Systems
Inventor: BENT HORACE GRAHAM
IPC: H04K1/02
Filed: 1966-09-15
Abstract: 1,189,861. Pulse modulation systems. H. G. BENT. 7 Nov., 1967 [15 Sept., 1966], No. 41198/66. Heading H4L. In a communication system providing secrecy, time division multiplex techniques are used, means being provided at the transmitter and receiver for selecting any one channel in each cycle of a cyclically repeated group of multiplex cycles. The remaining channels may carry noise or other signals. As described, ten channels per multiplex cycle are provided and any one of the ten may be selected in each cycle of a group of six multiplex cycles repeated cyclically. A synchronizing signal consisting of a pulse occupying two channel time slots occurs at the start of each group of six cycles. When transmitting, a pulse generator 12 controls a switching device 13 comprising six switches SA to SF which are connected sequentially to pass one pulse per multiplex cycle to open a channel gate 20 receiving an input from microphone 21, the remaining pulses controlling a gate 16 receiving an input from a noise generator 17. Signals from gates 16, 20 are fed via a modulator 18 to transmitter 19. When receiving, the demodulated signals are fed to a pulse shaper 25 and a channel gate 26. The pulses from shaper 25 are supplied to a sync. separator 27 controlling the switching device 13 which controls the gate 26.
Patent GB-930172-A (GB)
Title: Recovery of methyl chloroform
IPC: C07C17/38
Filed: 1961-11-20
Abstract: Methyl chloroform is recovered from liquid methyl chloroform containing a Friedel-Crafts catalyst by vapourising in a vaporisation zone while continuously feeding gaseous ammonia and steam into the zone to produce steam distillation, removing from the zone an overhead of methyl chloroform and water vapour, condensing and maintaining the water phase of the condensate at a pH of 6 to 12. The liquid methyl chloroform may contain other chlorinated hydrocarbons and the Friedel-Crafts catalyst may be anhydrous ferric chloride.  The temperature in the vapourisation zone may be between 150 DEG F. and 215 DEG F.  The pH of the water phase is maintained by continuous measurement with an arrangement to automatically adjust the ammonia feed stream.  The methyl chloroform is then obtained by conventional distillation methods. Specification 930,173 and U.S.A. Specification 2,676,997 are referred to.
Patent GB-857742-A (GB)
Title: Improvements in auxiliary lamps for motor vehicles
IPC: B60Q1/18
Filed: 1958-12-24
Abstract: 857,742. Auxiliary lamps for motor vehicles. SCHMIDT, D. Dec. 24, 1958 [Dec. 27, 1957], No. 41769/58. Classes 75(3) and 75(4). Auxiliary lamps to illuminate the roadway in front of a vehicle are mounted on a carrier formed as a forwardly projecting frame 2 which can be adjusted longitudinally in the direction of travel of the vehicle inside the contour determined by the cross-section thereof, on the front cross part of which frame lamps 3 pointing obliquely downwards and lamps 4 pointing vertically downwards are arranged at such a distance from the vehicle that they can be seen by the driver. Further lamps 5 directing their light transversely and lamps 6 directing their light vertically downwards may be mounted on the side members of the frame 2. The lamps may be simultaneously or selectively switched on. The frame 2 may be clamped on to the bumper bar 1 of the vehicle or be mounted so that it can be drawn out into the position for use from a resting position against the vehicle.
Patent GB-877633-A (GB)
Title: Improvements in or relating to magnetic recording tape
IPC: G11B5/845
Filed: 1959-12-09
Abstract: 877,633. Magnetic compositions. PHILIPS ELECTRICAL INDUSTRIES Ltd. Dec. 9, 1959 [Dec. 12, 1958], No. 41879/69. Class 38 (2). In the manufacture of a magnetic tape wherein a liquid suspension of magnetic material in a binder is applied in a thin layer on a support, passed through a magnetic field and subsequently set, the inhomogenity and strength of the field, the viscosity, and the tape speed are adjusted so that a uniform surface density. of magnetic material is provided on the tape The suspension may be applied from a nozzle 6 before the tape enters the field provided by polepieces 1, 2 (Fig. 1), or as shown in Fig. 3 the nozzle may be between the polepieces. Other field arrangements are disclosed (Figs. 4 and 5, not shown).
Patent GB-1005894-A (GB)
Title: New monoazo pigments and process for their manufacture
IPC: C07C50/24
Filed: 1963-10-23
Abstract: The invention comprises monoazo pigments monoazo pigments of the formula <FORM:1005894/C4-C5/1> in which R represents the grouping -R3CONHR4NHCOR5 or <FORM:1005894/C4-C5/2> R1 represents an anthraquinone residue, R3, R4 and R5 represent aromatic residues, especially benzene residues and R2 represents the residue of a coupling component that contains a hydroxyl group or an enolizable keto group in ortho-position to the azo group and a process for the preparation thereof wherein (a) a carboxylic halide free from acidic groups imparting solubility in water of the formula <FORM:1005894/C4-C5/3> is condensed in a molar ratio of 1 : 1 with a monoamine of the formula H2N-R or (b) a monocarboxylic acid halide free from acidic groups imparting solubility in water of the formula <FORM:1005894/C4-C5/4> is condensed in a molar ratio of 1 : 1 with an amine of the formula H2N-R4-NHCOR5 in which formulae R1-R5 have the meanings given above.  In examples: 1-amino-3-chloranthraquinone is diazotized and coupled with 2,3-hydroxynaphthoic acid, the product is converted to the corresponding acid chloride and reacted with 2 : 5-dichloro-1-benzoylamino - 4 - (21 : 41 - dichloro - 51 - amino) -benzoylaminobenzene to obtain a scarlet pigment (1) in a similar process 1-(31-carboxy)-phenyl - 3 - methyl - 5 - pyrazolone is employed instead of the hydroxynaphthoic acid (2) and in a similar process 1-amino-3-chloranthraquinone, acetoacetic ester and 2 : 5-dichloro - 1 - benzoylamino - 4(41 - chloro - 31-amino) - benzoylaminobenzene are employed (3).  Many additional starting materials are listed.  The pigments are employed for colouring rayon, cellulose ethers and esters, lacquers, aminoplasts, alkyd resins, polystyrene, polyvinyl chloride, polyethylene, polypropylene, polyacrylonitrile, rubber, casein and silicone resins.
Patent GB-1417474-A (GB)
Title: Heat-treatment of nickel-chromium-cobalt base alloys
IPC: C22F1/10
Filed: 1973-09-06
Abstract: 1417474 Heat-treating nickel alloys INTERNATIONAL NICKEL Ltd 28 Aug 1974 [6 Sept 1973] 41888/73 Heading C7A An alloy containing in wt per cent is solution treated at 1 120-1200‹C for 2-16 hours, followed by heating at 970-1030‹C for 2-10 hours, 870-930‹C for 8-48 hours, and finally ageing at 600-800‹C for 8-48 hours. After each stage the alloy may be air cooled or preferably by forced gas. It is used particularly for gas turbine components and for diesel engine turbo blowers.
Patent GB-1379324-A (GB)
Title: Methods of electrophotography
Inventor: GIAIMO JR E C
IPC: G03G13/22
Filed: 1972-09-11
Abstract: 1379324 Electro-photographic process RCA CORPORATION 11 Sept 1972 [22 Nov 1971] 42009/72 Heading G2H Intensification of a contrast in a toner particle image, formed on a photo-conductive member 10 by selective removal of a uniform coating of magnetic but electrostatically bound toner particles 30 in consequence of the projection of an electromagnetic radiation image on to the member, is brought about by illuminating the coating with a lamp 46. As the particles 30 fly off from the image areas of the member and are attracted to magnet 34 the masking effect which they impose on the light from the lamp decreases. Consequently the increase in conductivity brought about by the projected image is reinforced by impinging light from the lamp, and depletion of the toner coating is proportionately increased. Preferably the photoconductive member is transparent, and the projected image is applied from the side opposite the coating.