baber/WOPTO huggingface dataset:
Patent GB-1236059-A (GB)
Title: An electric motor control system
IPC: H02H7/093
Filed: 1968-10-31
Abstract: 1,236,059. Control of A.C. motors. BORGWARNER CORP. 31 Oct., 1968 [6 Nov., 19671, No. 51627/68. Heading H2J. In a system in which an A.C. motor 10 is supplied from an inverter 12, the triggering of which is controlled by a variable frequency oscillator 15, undesired " modulations " in the current output of the inverter, and hence in the motor torque, are eliminated by adjustment of the oscillator by signals representative of the modulations and applied via an adjustable band-pass filter in a " demodulator " 20. Circuit details are given (Figs. 2-4, not shown). The output of the inverter is connected to a transformer which is followed by a rectifier and a capacitor which eliminates D.C. components. The positive and negative excursions of the resulting signal are clipped at adjustable levels and applied via emitter follower connected transistors in an impedance matching stage to the band-pass control circuit, which comprises separate, adjustable, R.C. circuits for upper and lower frequency limits. Each circuit has an output amplifier and the two are connected in series to produce an A.C. signal which corresponds to the undesired modulations only and makes fine adjustments to the instantaneous frequency of the oscillator which controls the inverter. The motor may be a synchronous machine, either of the reluctance or hysteresis type, or separately excited, or may be an induction motor.
Patent GB-1469642-A (GB)
Title: Containers
IPC: B29C65/60
Filed: 1973-11-09
Abstract: 1469642 Attaching handles to containers; riveting METAL BOX Ltd 30 Oct 1974 [9 Nov 1973] 52080/73 Headings B3A and B3U [Also in Division B8] A method of fixing a handle 2 to a wall portion of a container 1 comprises forming a hole in the wall portion having an outwardly projecting upset peripheral margin 5, locating a handle 2 having an aperture 6 at an end portion on to the margin, fitting a rivet into the hole, and heading the rivet to seal the hole and retain the handle upon the upset peripheral portion. The rivet (3), Figs. 1, 3 (not shown), has a head 3C and an upset stem 3A and may be formed of plastics or metal. One or more washers may be provided around each rivet shank, and an outwardly turned upset marginal portion may be provided around the aperture 6 in order to increase the contact area between the handle and the peripheral portion.
Patent GB-1103579-A (GB)
Title: Liquid freezer
IPC: F25C1/10
Filed: 1965-12-09
Abstract: 1,103,579. Ice-making. GENERAL MOTORS CORPORATION. 9 Dec., 1965 [28 Dec., 1984], No. 52276/65. Heading F4H. Ice-making apparatus comprises an endless belt made up by a plurality of moulds 47 hinged together by pivot-pins 56 and means for twisting the moulds in the upper run of the belt to loosen the ice blocks so that when the belt subsequently reverses its movement the blocks are ejected into a bin 83. Premature ejection of the blocks is prevented by a guard and the moulds are again twisted after reversal to ensure complete ejection. The ends of pivot-pins 56 run in guide grooves 60 (Fig. 3) and 62 (Fig. 4), the latter having a downwardly curved portion 76 for effecting the initial twisting of the moulds. The subsequent twisting is effected by curved portions 84 and 86 in grooves 60 and 62 respectively, said portions being curved in opposite senses to double the amplitude of twisting, and groove 84 is provided with a step 88 for suddenly releasing the twisting when at its maximum. The bin 83 is mounted on a refrigerator door 90 and when in position pivots an arm 92 which tensions a spring (121, Figs. 6 and 7, not shown), to urge a roller (131) mounted on a spring arm (129) into contact with a cam (133) rotated by the motor driving the belt. The spring arm then operates a plunger (127) to close a switch (125) which actuates the motor and movement of the cam causes a feeler arm 135 (Fig. 3) to pivot into and out of the bin 83. When the level of ice in the bin is sufficient to prevent movement of arm 135 the roller is prevented from following the cam so that the spring arm opens the switch to de-energize the drive motor. Water is supplied to the moulds by a pipe 70 under the control of a valve 72 actuated by a beltcontrolled switch.
Patent GB-1459201-A (GB)
Title: Electrostatic copying apparatus
IPC: G03G21/02
Filed: 1973-11-12
Abstract: 1459201 Controlling electrostatic copiers AGFA-GEVAERT AG 12 Nov 1973 [11 Nov 1972] 52318/73 Heading G2H When a single copy of an original is required from an electrostatic copier actuated by switch 9 and turned off by switch 29, key 7 is depressed to operate switch 9 and cause pawl 3 to move against one of the teeth of wheel 2 and move it from one to the next of the positions imposed by engagement of spring-loaded pin 11 with holes 2a. Relative movement is possible between wheel 2 and number bearing knob 12, within limits imposed by engagement of rod 24 with plates 25, 26. As long as rod 24 remains against plate 25, the wheel 2 and knob I rotate together, whether anti-clockwise in consequence of depression of key 7 or clockwise as the results of operation of pneumatic cylinder 22 after the making of a copy. Setting of a greater number than one on knob 12 causes wheel 2 to move one place less than knob 12, as the rod 24 moves  against plate 26. The remaining place is made up when the key 7 is depressed to start copying. Reference has been directed by the Comptroller to Specification 1337574.
Patent GB-1065906-A (GB)
Title: Photographic objective
IPC: G02B9/12
Filed: 1965-12-09
Abstract: 1,065,906. Photographic objectives. EASTMAN KODAK CO. Dec. 9, 1965 [Dec. 14, 1964], No. 52326/65. Heading G2J. An objective suitable for placing at the rear of a diaphragm 4 consists of a double convex element 1, a double concave element 2 and a double convex element 3 wherein: - Optical data are given for the example shown.
Patent GB-1470067-A (GB)
Title: Direct current arc supply
IPC: B23K9/073
Filed: 1974-12-06
Abstract: 1470067 Current control for welding arc AIR PRODUCTS & CHEMICALS Inc 6 Dec 1974 [20 March 1974] 52871/74 Heading G3R A controlled supply system for a D.C. arc in inert gas welding apparatus employs both current and voltage feedback to provide running stabilization of the arc and has a starting arrangement for ensuring correct current build up and an overcurrent protection circuit which responds both to large short term surges as well as longer periods of over-current. The supply for arc 26 is derived from a mains transformer 12 through a controlled rectifier assembly 14 operated by firing unit 55. A shunt 22 provides a current signal input to unit 45 and the voltage across the arc is supplied to unit 46. The circuits 45, 46 typically are ganged potentiometers so that the proportion of current and voltage feedback can be set. The fed back signals are summed together with a reference voltage, from a potentiometer, in summing filter amplifier 42 which  includes a low pass filter to eliminate ripple from the fed back signals. The signal on line 50 passes through an amplifier having a settable integral plus proportional characteristic to the over-current unit and the firing unit SS for the SCR's in rectifier 14 to provide the desired arc voltage and current. Starting circuit 53 Fig. 2 (not shown) To facilitate starting the arc it is neccessary to sustain a starting current until the arc is stabilized and this is achieved by control 53 which includes a circuit for providing a separate higher starting reference voltage and a circuit for providing an output when the current feedback signal is greater than a pre-set start reference signal to operate a relay to undamp the output of amplifier 52. To avoid oscillatory operation of the relay a time delay network is included comprising a series of capacitors, one of which may be selected by a switch so that changeover to normal operation is delayed until the arc current has exceeded the start reference signal for a selected period. Overcurrent protection Fig. 2a (not shown) The arc current is combined with a voltage reference signal and supplied to an integrating operational amplifier whose output is applied to a further operational amplifier which supplies an SCR in a relay supply circuit so that on an overcurrent of sufficient magnitude, i.e. amplitude and/ or duration, being present the relay operates to break the connection between amplifier 52 and firing unit 55. An alarm system is provided to indicate overcurrent tripping. Pulse generator A pulsing control of the SCR's may be used to give a stirring or wetting action in the weld melt and thus improve the quality of the finished weld. The generator 250 provides pulses which are applied to the amplifier 42 when a manually operated switch is closed. This technique is especially suitable when a continuous background current is present.
Patent GB-1455455-A (GB)
Title: Piston casting
IPC: B22D27/04
Filed: 1973-11-14
Abstract: 1455455 Processes for casting cylinder blanks; moulds; cores KARL SCHMIDT GmbH 14 Nov 1973 [14 Nov 1972] 521915/73 Heading B3F A piston blank is cast in a steel mould 1 containing a sand, or as shown, a composite steel core 5 which may be water-cooled, the mould when filled being cooled firstly at the piston-skirt end, e.g. by water sprayed from a ring 7. Molten Al alloy is introduced either under low-pressure from a melting furnace (with further pressure during solidification as shrinkage occurs) through a pipe 2 and a fitting 3 which may be cooled, or by pouring down the mould side from a spouted ladle (19), in which case a composite steel core closes the mould bottom. Between casting cycles in the latter case, the mould 1 is rotated to even stress and and wear. As shown, the spray ring 7 is secured to the mould 1 while a deflecting skirt 8 (which with the aid of air blown up through a gap 9 removes the water to a box 10) is vertically movable, in a timed relation to control solidifidation, to change the length of the water layer on the mould 1. In the inverted arrangement, in which the mould bottom is closed by the core, there is no deflecting skirt but the spray is vertically movable to control the solidification.
Patent GB-1169296-A (GB)
Title: Driving Means for a Steering Propeller of a Watercraft
IPC: B63H20/34
Filed: 1967-11-22
Abstract: 1,169,296. Steering propellers. SCHOTTELWERFT, JOSEF BECKER K.G. 22 Nov., 1967 [7 Dec., 1966], No. 53122/67. Heading B7V. Driving means for a steering propeller 1 of a watercraft in which a housing 2 extending below the water-level and which carries the propeller is rotatable for the purpose of steering relative to a stationary housing 3 above water level, is characterized by the feature that a face-plate 13 is attached to the rotatable housing 2 and is held in the housing 3 by radial bearing 14 and axial sliding bearings 17, 18. In the embodiment shown the face-plate 13 is driven by the steering motor 21 and the members of clutch 6 are arranged coaxially with the bevel pinion of the bevel drive.
Patent GB-531874-A (GB)
Abstract: 531,874. Workmen's time recorders. GLEDHILL, A. H. Aug. 5, 1939, No. 22748. [Class 106 (iv)] A workmen's time recorder wherein the time is printed on an inserted card by the depression of a hand lever A which retracts a printing hammer C against its actuating spring, has a paper tape E on which a duplicate and continuous record is made of the times at which buses, trams &c. pass a given point, the tape being fed a step each time handle A is operated. The card is placed in a sheath B and printed by hammer C against ribbon D and time wheels F, F1, F2. There is also a wheel H, loose on shaft f<SP>1</SP> and carrying type for bus route symbols, which is set to print the desired symbol by a toothed sector j and arm J co-acting with a notched gate K. The duplicate record is produced in inverted type from the wheels F, F1, F2, H on a transparent tape E which passes from roll e to roll e<SP>8</SP> and is fed one step by ratchet and pawl M, m<SP>1</SP> each time the handle A is operated.
Patent GB-1140809-A (GB)
Title: A device for cutting cigar wrappers or binders
IPC: A24C1/04
Filed: 1967-11-22
Abstract: 1,140,809. Cutting cigar wrappers. ARENCO A.B. 22 Nov., 1967 [1 Dec., 1966], No. 53275/67. Heading B4B. A device for cutting cigar wrappers or binders from tobacco leaf comprises a cutting blade 3 along which are movable resiliently-mounted cutting rollers 4 to 9 mounted in a holder 10 carried on an arm 21 which is movable about a pivot 20, the arm 21 being pivotally connected to a cam-operated rod 23 so that the arm can be moved alternately between an upper and a lower position, the holder 10 being connected to a piston rod 12 which, with piston 14, is movable in a double-acting pnuematic cylinder 13 under control of a valve 16 connected to a compressed air line 18, the actuator arm 19 of the valve being cam-operated. The pneumatic means may be replaced by mechanical means. Further, the arm 21 may be vertical and displaceable lengthwise for lifting and lowering the holder 10. In addition, the rollers 4 to 9 may roll in only one direction over the blade 3 in a single cutting operation.
Patent GB-1294118-A (GB)
Title: Electronic imaging system
IPC: H01J29/89
Filed: 1969-11-03
Abstract: 1294118 Television WESTINGHOUSE ELECTRIC CORP 3 Nov 1969 [8 Aug 1969] 53796/69 Heading H4F [Also in Division H1] An imaging system 10 includes an image intensifying tube 12 having a photo-cathode 16, a fibre optic output window 18 coated with an output phosphor 20 which is connected to conductive means 21; a camera tube 14 having a fibre optic input window 30 with a photocathode 32 on its inner surface; a fibre optic spacer member 50 between the windows 18, 30; means for operating the camera photo-cathode 32 at a negative potential with respect to the output phosphor 20; and a conductive coating 52 between the output window 18 and the spacer 50 in contact with the window and connected to the conductive means 21. The camera tube includes a storage target 34 scanned by an electron gun 36, the target output is connected to a display device. The coating 52 is of Au, Ag or A1 and may be on the window 18.
Patent GB-543338-A (GB)
Abstract: 543,338. Stapling continuous filament yarn. AMERICAN VISCOSE CORPORATION. Oct. 17, 1940, No. 15392. Convention date, June 1. [Class. 120 (iii)] A broken filament yarn is produced by directing a travelling continuous filament yarn across the abrasive surface of a revolvable member which is rotated by the yam so that the abrasive surface has a peripheral speed greater than the rate of travel of the yarn. As shown the abrasive surface 8 is provided on the face of a cylindrical member larger than a hub portion 3 to which it is fixed and which is freely rotatable' on a shaft 5 by the travelling yarn. The yarn 1 passes from a guide 10 around the hub portion 3 to guides 6, 7 by which it is directed across the abrasive surface 8; the guides 6, 7 are adjustable to vary the path of the yam and the extent of the abrading action on the yarn. Specifications 167,458, [Class 120 (iii)], and 540,729 are referred to.
Patent GB-1496499-A (GB)
Title: Device for controlling the passage of light
IPC: B24B9/16
Filed: 1974-12-19
Abstract: 1496499 Controlling light BBC BROWN BOVERI & CO Ltd 19 Dec 1974 [21 Dec 1973] 55071/74 Heading G2F A display device comprises an electro-optic nematic liquid crystal 45 degrees "twist" cell with only two electrodes between a linear polarizer and a reflector for passing light transmitted by the cell back thereto, there being no further polarizer between the cell and the reflector. In a first embodiment the voltage applied to the cell is such that the nematic layer then acts as a quarter wave plate to at least one visible wavelength which is thus prevented from being reflected back through the polarizer (as described the device becomes dark purple with applied voltage). In a second embodiment, the applied voltage is greater and renders the cell isotropic towards light as normal incidence, and a quarter wave plate is disposed between the cell and reflector. The quarter wave plate acts as such to all visible wavelengths (birefringence proportional to wavelength, as in mineral apophylite, or stretched cellulose nitrate films) for neutral intensity modulation. The nematic alignment direction at the side of the cell adjacent the polarizer should be at 0 degrees or 90 degrees to the preferred direction of the polarizer. Depending on whether the device should appear bright or dark in the absence of an applied voltage, the optic axis of the wave plate should be at 45 degrees, or at 0 degrees or 90 degrees to the preferred direction of the polarizer.
Patent GB-1166113-A (GB)
Title: Bag Stacker
Inventor: CRAWFORD DONALD CHRISTY
IPC: B65H29/46
Filed: 1966-09-15
Abstract: 1,166,113. Delivering sheets. FMC CORP. 15 Sept., 1966 [17 Sept., 1965], No. 55406/68. Divided out of 1,166,111. Heading B8R. Bag stacking and unloading apparatus comprises a wicket conveyer having a plurality of pairs of projecting hollow pins, a stacking station wherein pairs of said pins are successively located for receiving bags, reciprocatory plunger means at said stacking station for impaling bags on the pair of pins instantaneously at said stacking station, an unloading station wherein a pair of pins extends into an unobstructed zone so that a stack of bags can be removed therefrom, and means for indexing said wicket conveyer to bring a stack of bags to said unloading station. The subject matter is the same as that of Specification 1,166,111.
Patent GB-1372409-A (GB)
Title: Process for separating photoconductive particles
IPC: G03G5/08
Filed: 1971-11-30
Abstract: 1372409 Electrostatic separation F U J I PHOTO FILM CO Ltd 30 Nov 1971 [2 Dec 1970] 55636/71 Heading B2J A stream of mixed photoconductive particles 32, some having suitable characteristics for use in electrophotography and others not, is fed from a hopper 32 past a charging electrode 37 to form a charged layer 39 on an electricaly conductive endless belt 38 driven by rollers 40, 41 and 42. Contaminated particles (Fig. 4 not shown) of the type having a reduced electrostatic attrostion to the belt 38 are removed by an air stream and are collected in a vacuum chamber 45. The remaining charged layer is then exposed to light from a source 48 so that particles having the required photoconductive characteristics will lose their charge and fall into a container 49 for final collection and use. The unsuitable particles of the type which still retain their charge after exposure (Figs. 2 and 3 not shown) remain on the belt 38 and are subsequently removed therefrom by a brush 52. Reference has been directed by the comptroller to Specification 1281049
Patent GB-1411134-A (GB)
Title: Heat-activatable adhesive
IPC: C08L33/00
Filed: 1972-12-08
Abstract: 1411134 Laminates DYNAMIT NOBEL AG 8 Dec 1972 [9 Dec 1971] 56826/72 Heading B5N [Also in Divisions B2 and C3] Laminates may be prepared using as adhesive a heat-activated composition comprising (1) at least one thermoplastics material, (2) at least one plasticizer which is solid at 20‹ C. and (3) at least one indene and/or coumarone resin, the adhesive being free from paraffins or waxes and each of said components being in the form of discrete particles so that the adhesive is in the form of a heterogeneous multiphase system. The plasticizer may be dicyclohexyl phthalate, diphenyl phthalate, ditrimethylcyclohexyl phthalate, methyl phenyl isophthalate, N-alkylated toluene sulphonamides, p-toluene sulphonic acid esters or benzoates. The thermoplastics material may be a polymer of acrylic, methacrylic or crotonic esters, vinyl chloride or vinyl acetate. The compositions may also contain dyes, emulsifiers and thickeners, and may be applied from aqueous dispersions to paper, cardboard, plastics, leather and textiles which may be bonded, after activating the adhesive, to glass, metals, plastics and ceramics. In examples papers coated with adhesives comprising coumarone/ indene resin, vinyl chloride/2-ethylhexyl acrylate copolymer and (1-5) dicyclohexyl phthalate and (6 and 7) glyceryl tribenzoate are heatactivated and bonded under pressure to untreated polyethylene film.
Patent GB-568776-A (GB)
Abstract: 568,776. Furnace electrodes. STRODE, M. (Larssen, G. Hagerup-). Oct. 6, 1943, No. 16353. [Class 39 (iii)] In an electrode 1 of the self-baking type, enclosed in a thin aluminium sheath 2 which moves with it, the upper end being surrounded by a fixed casing 3, contact studs 4 are inserted through slots in the casing in a downwardly inclined direction so that they become fixed in the lower baked zone. The electrode becomes baked to a higher level in the centre and the points of the studs become fixed while the paste adjacent the heads .5 is still fluid, so that the casing 3 is braced against the pressure of the paste by the shoulders 5a of the studs. The electrode is suspended by chains, the chains engaging holes 11 in the studs.
Patent GB-1351920-A (GB)
Title: Magnetic bubble domain detection system
IPC: G11C19/08
Filed: 1972-12-11
Abstract: 1351920 Magnetic storage arrangements ROCKWELL INTERNATIONAL CORP 11 Dec 1972 [20 Sept 1972] 57036/72 Heading H3B To enhance the response of a magnetoresistive detector 29 in a moving single wall domain system, a cylindrical domain 100 is elongated in steps 100A, 100B in a direction transverse of the propagation path to a maximum elongation 100C adjacent the detector, the elongated domain being subsequently contracted as shown at 100D and 100E to its initial cylindrical form 100F. The propagation path is defined by spaced permalloy chevrons 10 to 14 and 25, and domain propagation is effected by an in-plane rotating magnetic field produced by excited quadrature coils 27, 39. Domain elongation is obtained by the provision of additional parallel chevrons 16, 18, 19 arranged as an increasing series, while contraction is effected by a decreasing series of parallel chevrons 21, 22 and 24. The chevrons may be positioned so that the normal gap between adjacent chevrons in the propagation path is beneath the magnetoresistive element 29, as shown, or may be arranged so that the apices of a maximum parallel group of chevrons is adjacent one edge of the element, Fig. 4 (not shown). In either case a double pulse signal is produced by the magnetoresistive element as an elongated domain passes under its two edges. Conductors 23A, 23B connect the element 29 to a sensor 24. Other forms of permalloy elements may be used such as Y and T bars.
Patent GB-1379395-A (GB)
Title: Thermal radiation sensitive device
IPC: G02B23/12
Filed: 1971-12-09
Abstract: 1379395 Uses of luminescence PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 9 Dec 1971 [12 Dec 1970] 57283/71 Heading C4S A thermal radiation sensitive device comprises a gas filled chamber 2, a thermal radiation sensitive target 1 having a low transverse thermal conductivity mounted in the chamber, means for cooling the target and means to record and display an image formed on the target. The target is of thermally quenched luminescent material on a resin substrate also coated with metal to absorb heat. The target is cooled by a liquid nitrogen jacket 5. Thermal rays from an object 12 are focused by mirrors 15, 16 and pass via a shutter 11 on to the target. The target is irradiated by U.V. light from a source 17 through a semi-transparent mirror 19 to form a visible image which is photographed by a camera 21 or viewed by an image intensifier or TV camera. In another embodiment the target is cooled by adiabatic expansion of the gas in chamber 2 and the object, target and viewing station are arranged in a straight line. The target may be of a material whose resistance or reflectivity changes with temperature or may be the target of a bolometric camera tube. To further reduce conductivity the target may be in matrix form.