baber/WOPTO huggingface dataset:
Patent GB-915425-A (GB)
Title: Method and apparatus for sensing magnetic characters
IPC: G06K9/00
Filed: 1959-12-30
Abstract: 915,425. Character - recognition systems. INTERNATIONAL BUSINESS MACHINES CORPORATION. Dec. 30, 1959 [Dec. 30, 1958], No. 44266/59. Class 106 (1). In a magnetic character-sensing system a magnetic field is established in an air gap in a magnetic circuit in such a way as to produce a field boundary in the gap which is transverse to the length of the gap, and the field boundary is moved relative to a character to be sensed so as to scan the character. In one embodiment, Fig. 1, a magnetic field gradient is set up along one edge of the gap (from face A to face B) by a permanent magnet 12 which is connected across polepiece 22 having a high reluctance. A constant, opposing magnetic field is set up by the other polepiece 26 so that a magnetic potential null point exists across the gap at one point along its length, for example at the end A of the gap. The field boundary constituted by the null point may be used to scan a character by moving the gap relative to the character, but preferably the boundary is caused to travel along the length of the gap by applying a sawtooth voltage to winding 30. A character is sensed in positions 1-4, Fig. 2, in each of which a pulse such as 44, 46 is produced as the boundary passes over an edge of the character, owing to the increased flux density across the gap where parts of the character are situated. The interval between pairs of pulses 44, 46 indicates the length of the corresponding scanned character portion. In another embodiment, Fig. 6, the magnetic circuit includes a second air gap 104 having a linearly varying width. Polepieces 100, 110 are laminated in planes transverse to the length of gap 102. When a sawtooth voltage is applied to winding 115, gap 104 first saturates at its narrowest end and flux flows through the magnetic circuit and extablishes a field boundary across the corresponding end of gap 102. As the current in winding 115 increases gap 104 saturates further and further along its length and in this way the field boundary is swept along gap 102.
Patent GB-1071668-A (GB)
Title: Feeder body for providing a feeding space in a casting mould
IPC: B22C9/08
Filed: 1963-11-12
Abstract: 1,071,668. Moulding plastic substances; sheet forming. E. BAUR. Nov. 12, 1963 [Nov. 16, 1962; April 3, 1963; July 8, 1963], No. 44664/63. Heading B5A. [Also in Division B3] Hollow, pattern bodies for use in foundry moulds (see Division B3) are made from shells formed from sheets (18) of synthetic plastics material by lowering a box (19), Fig. 7 (not shown), having a bottom consisting of a rubber diaphragm (20) on to a heated sheet (18) and passing compressed air into the box so that the sheet is pressed against a pattern (17) beneath it.
Patent GB-1115825-A (GB)
Title: Improvements in or relating to tamper-proof packages
IPC: B65D41/42
Filed: 1966-10-06
Abstract: 1,115,825. Caps for bottles etc.; capping bottles &c. CONTINENTAL CAN CO. Inc. 6 Oct., 1966 [8 Oct., 1965], No. 44713/66. Heading B8T. A tamper-proof cap 10 for a bottle &c. 22 has a security band 18 with a rolled-in edge 20 which is pressed under and into a groove 23 around the bottle &c. neck, a layer of gasket material 16 in the cap flowing into cam grooves 26 around the neck and setting in these grooves when the cap is applied to the bottle &c. Vertical grooves 21 in the security band 21 slide over projections 36 around the bottle &c. neck. When the cap 10 is unscrewed, the solidified lugs formed by the gasket material 16 cam the cap upwards on the bottle neck as they slide out of the cam grooves 26; the interengaging grooves and projections 21, 31 in the security band and around the bottle neck prevent the band from turning. Thus bridge sections 19 between the cap body 10 and the security band 18 are broken, and the latter slides free down the bottle &c. neck. A punch (33), Fig. 3 (not shown), of ring shape, is used to press the rolledin edge 20 of the cap 10 into the neck groove 23. In a modification, the cam grooves 26 are replaced by cam grooves (56), Figs. 6-9 (not shown), around the outer side face of the bottle &c. neck.
Patent GB-1157448-A (GB)
Title: Mining Machine
Inventor: PAGE RONALD CECIL
IPC: E21C27/02
Filed: 1965-10-22
Abstract: 1,157,448. Mineral-mining machines. COAL INDUSTRY (PATENTS) Ltd. 13 Oct., 1965 [22 Oct., 1965], No. 44772/65. Heading E1F. In a mining machine a drive is taken from the drive motor - containing body of the machine to a cutter drum 2 mounted on an arm 1 for rotation about an axis at right angles to the plane of swing of the arm by a transmission 6-10 extending from the motor through the arm to a drum-driving reduction gear housed within the drum. The reduction gear preferably involves two epicylic reduction stages.
Patent GB-992554-A (GB)
Title: Means for converting the ratio of two alternating electrical signals into a direct current or voltage signal
Inventor: HUTCHEON IAN CARRADUS
IPC: G06G7/162
Filed: 1961-12-14
Abstract: 992,554. Induction flowmeters. GEORGE KENT Ltd. Dec. 14, 1962 [Dec. 14, 1961], No. 44907/61. Heading G1N. [Also in Division G4] A circuit for measuring the ratio of two alternating electrical signals, which may be indicative of the field current and generated e.m.f. in an electromagnetic flow meter, includes a Hall plate H to an input of which one of the two signals, Ia, is applied, an A.C. amplifier A and a demodulator D. The direct current output from the demodulator, Id, is applied to the other input of the Hall plate and the A.C. output from the plate is opposed to the other of the two alternating signals, the error signal thus derived being fed to the amplifier and thence to the demodulator. The demodulator output current Id gives a measure of the required ratio of the two alternating signals. As shown in Fig. 1 the A.C. signal Ia is applied directly to the plate, while the D.C. signal Id controls the magnetic field across the plate, but this order may be reversed (Fig. 2 not shown). If the two initial alternating signals are slightly out of phase, a quadrature feedback circuit may be included to eliminate the out of phase component. This circuit includes a second demodulator sensitive to the out of phase component supplying a D.C. input to a second Hall plate, whose other input is provided by a signal related to the initial A.C. input, but phase shifted through 90 degrees. The second Hall plate output is then applied to one input of the amplifier A to suppress any quadrature input (Fig. 3 not shown).
Patent GB-1306709-A (GB)
Title: Differential amplifiers
IPC: H03F3/195
Filed: 1970-09-22
Abstract: 1306709 Matrix stores SIEMENS AG 22 Sept 1970 [23 Sept 1969] 44967/70 Heading G4C [Also in Division H3] A read-out arrangement for a matrix store comprises four amplifiers LV1-LV4 (see Division H3) each assigned to one read-out wire section L1-L4 respectively from a large matrix core store whose read-out wire is sub-divided into a plurality of sections in order to reduce parasitic voltages. The output from each amplifier is fed over capacitors, e.g. C21, C22 to oppose the voltage developed by a corresponding bias network R20-R24; the resultant voltages are applied to the inputs of a NOR gate J2 which produces an output when signals appear simultaneously at the outputs of all four amplifiers. The output from NOR gate J2 is applied to a scanner stage AB containing AND gate J3 having two complementary outputs UA, UA. AND gate J3 has four inverting inputs, one connected to the output from NOR gate J2, two in common to a potentiometer R33, R34 and one to a source of negative pulsing signals - U B  whereby output pulses from the scanning circuit A B  occur at a specific time in the machine cycle.
Patent GB-961064-A (GB)
Title: Improvements in or relating to oleophobic articles
IPC: D06M15/643
Filed: 1961-12-15
Abstract: Various materials are rendered oleophobic by treatment with a polydimethylsiloxane gum having a viscosity of at least 1,000,000 cs. at 25  DEG C., the degree of oleophobicity of the treated material being such that a drop of USP heavy mineral oil does not wet the surface thereof within two minutes.  The gum may contain up to 7,5 mol per cent of other siloxane units.  The gum must be free from non-curable material; and may be produced by freeing the initial polymer from condensation catalyst followed by solvent extraction, or by condensation of a cyclic-free hydroxyl end-blocked dimethylsiloxane polymer using calcium oxide as catalyst. Conventional curing agents are added to the gum before application to the material to be treated.  The gum may be applied, as such or as an aqueous emulsion or solution in an organic solvent, by padding, dipping, or spraying.  Materials specified are aluminium, brass, iron, glass, plastics, leather, wood, masonry, paper, and fabrics of metal, asbestos, cotton, rayon, linen, wool, silk, nylon, Orlon, Dacron, and Dynel. Specification 746,307 is referred to.ALSO:Various materials are rendered oleophobic by treatment with a polydimethylsiloxane gum having a viscosity of at least 1,000,000 cs at 25 DEG C., the degree of oleophobicity of the treated material being such that a drop of USP heavy mineral oil does not wet the surface thereof within 2 minutes.  The gum may contain up to 7.5 mol per cent of other siloxane units, e.g. monomethyl, methylethyl,/or methy vinyl soloxane units.  The gum must be free from non-curable material; and may be produced by freeing the initial polymer from condensation catalyst followed by solvent extraction, or by condensation of a cyclic-free hydroxyl end-blocked dimethylsiloxane polymer using calcium oxide as catalyst.  Conventional curing agents are added to the gum before application to the material to be treated.  The gum may be applied, as such or as an aqueous emulsion or solution in an organic solvent, by padding, dipping, or spraying. Materials specified are leather, wood, masonry, paper, and fabrics of metal, asbestos, cotton, rayon, linen, wool, silk, nylon, Orlon, Dacron and Dynel.  Specification 746,307 is referred to.
Patent GB-1126101-A (GB)
Title: Grinding and polishing machines
Inventor: JONES EMRYS
IPC: B24B21/00
Filed: 1964-11-05
Abstract: 1,126,101. Grinding. WILMOT BREEDEN Ltd. 4 Feb., 1966 [5 Nov., 1964], No. 45099/64. Heading B3D.  A grinding or polishing machine comprises a head 10 for supporting a band 16 coated with abrasive material, and a support 21 on which the head is mounted for pivotal movement about an axis which lies substantially in the plane of the centre line of the band when in position. The head 10 includes a contact pulley 11, a pulley 17 having an adjusting worm 18 for controlling tracking of the band, a pulley 15 loaded by spring or other means for tensioning the band, and a pulley 19 driven by a belt from a motor. In addition, pulley 11 is resiliently urged about a pivot 13 by a pneumatic piston and cylinder unit 14 to absorb sudden acceleration of the head and prevent over-polishing of the work. The head is secured to a hollow pivot spindle mounted for movement in a block 23 on the end of a horizontal shaft 24 the axis of which passes through the centre line of the band. The shaft 24 is mounted in bearings in a member 25 pivoted on a vertical axis 26, Fig. 2 (not shown), on the column 21. The weight of the head is counterbalanced by a weighted arm 27 and a pneumatic biasing device 29, and a telescopic assembly 28 controls the pressure applied to the work as it passes horizontally beneath the contact pulley. A gear 31 is mounted on bearings on the shaft 24 and engages a gear 32 for adjusting the inclination of the head about the axis of the shaft 24. A pair of oppositely acting springs 33, 34, Fig. 3 (not shown), act on the gear to resiliently urge the head to a datum position, and a pneumatic device 35 is provided to turn the head if desired.
Patent GB-1199622-A (GB)
Title: Golf Green
Inventor: ANDERSON ROBERT IMBODEN
IPC: A63B67/02
Filed: 1967-10-04
Abstract: 1,199,622. Golf game. BRUNSWICK CORP. 4 Oct., 1967 [5 Oct., 1966 (2)], No. 45118/67. Heading A6D. A contourable green for a golf game comprises a platform of sufficient rigidity to support one or more golfers and of sufficient flexibility to be distorted to a plurality of non-planar forms, a putting surface on said platform and at least two jacks secured to the underside of the platform whereby the platform may be distorted. In Figs. 3 and 4 the platform includes rigid beams 60 supported on flexible beams 62 in turn supported by the piston rods of jacks 72 which may be operated so as to have their piston rods extended from cylinders 82 varying distances. Each flexible beam includes a hose which may be made rigid by the application of hydraulic pressure. The movements of the jacks are produced by the application of hydraulic pressure through valves controlled electrically in relation to potentiometers the sliders of which are moved by contact with the contoured surface of a rotatable cam or resistance networks connected by manually operated switches.
Patent GB-1528199-A (GB)
Title: Hydraulic brake boosters for motor vehicle brake systems
IPC: B60T13/14
Filed: 1975-10-31
Abstract: 1528199 Boosters ROBERT BOSCH GmbH 31 Oct 1975 [2 Nov 1974] 45135/75 Heading F2F An hydraulic brake booster comprises an operating rod 10 on which is mounted a sleeve 15 slidable in a bore of the booster housing to form a slide valve controlling flow between inlet 23 and either outlet port 21 to drain or booster cylinder 14 to act on booster piston 31 which is coupled to master cylinder piston 33. The sleeve 15 (Fig. 2), which is actuated by movement of a spring housing 7 coupled to ram 5 through a spring 8, incorporates external annular grooves 17 and 18 located, when the brakes are released as in Fig. 1, adjacent outlet and inlet ports 21 and 23 respectively and interconnected by a helical groove 24 or alternatively by a longitudinal groove intersecting annular grooves. In the brake released position port 23 communicates with port 21 via an annular cylindrical clearance 27 between rod 10 and sleeve 15, a radial bore 18<SP>1</SP>, groove 18, helical groove 24 and annular groove 17. Operation.-Depression of pedal 2 causes leftward movement of sleeve 15 such that groove 17 moves out of register with port 21, so that fluid can no longer drain from port 23, and groove 18 moves into register with port 23 such that fluid from pump 22 passes into booster cylinder 14 via bore 18<SP>1</SP> and clearance 27 to move booster piston 31 leftward against return spring 34. The pitch of the grooves 24 is less than the diameter of inlet port 23 in order that the latter shall still communicate with booster cylinder 14 when groove 18 has moved leftward beyond inlet port 23.
Patent GB-1104630-A (GB)
Title: Improvements relating to photographic apparatus
IPC: G03D9/00
Filed: 1966-10-10
Abstract: 1,104,630. Withdrawing film from film packs. INTERNATIONAL POLAROID CORPORATION. Oct.10, 1966 [Oct.21, 1965], No.45143/66. Heading G2A. Apparatus for successively withdrawing exposed film units 18 from a film pack in a camera (not shown) includes a first carriage 20 mounted to reciprocate to and from the camera back by means of guide rods 22, 23 slidable in apertures in a mounting brace (12), Fig. 1 (not shown) attached to the camera and a second carriage 28 slidably mounted on the first carriage by means of guide rods 30, 32. To withdraw a film unit, the carriages are moved by means of a handle 38, into engagement with the camera back, and clamping means on the carriage 28 are tipped to engage a leader 17. The carriage 28 is then moved away from the camera back so as to withdraw the leader 17 and sever it from the unit 18, withdrawal causing a leading end 45 of the unit to project from the camera back into clamping means on the first carriage 20. Further movement of the carriage 28 picks up the first carriage 20, thus causing the clamping means thereon to grasp the end 45, and causes the carriage 20 to withdraw the film unit 18 from the camera back. At maximum extension of both carriages from the brace (12), releasing means automatically free the leader 17 and the end 18 from the respective clamping means, and the leader clamping means is cocked.
Patent GB-1436191-A (GB)
Title: Motors
IPC: H02K17/16
Filed: 1973-09-27
Abstract: 1436191 Rotors of dynamoelectric machines ACOMEL SA 27 Sept 1973 [3 Oct 1972] 45251/73 Heading H2A A solid non-laminated conductive rotor suitable for use in a high speed asynchronous motor, or in a synchronous motor having asynchronous starting characteristics, has transverse grooves 2 formed around its periphery, the depth r of the grooves being less than the penetration depth of the induced current flowing in the material of the rotor at the fundamental frequency but being greater than the penetration depth of any harmonics thereof; the fundamental frequency component of the induced current is thereby able to flow relatively freely but the harmonic components are obstructed. The rotor may also have axial peripheral grooves and end rings (neither illustrated).
Patent GB-1160560-A (GB)
Title: Improvements in or relating to Apparatus for Marking Examination Papers
Inventor: WHYTE-HENDERSON DAVID ALEXANDE
IPC: G09B3/08
Filed: 1965-10-27
Abstract: 1,160,560. Educational aids. PENNANT DISPLAY & ENG. Ltd. 21 Oct., 1966 [27 Oct., 1965], No. 45388/65. Heading G5G. A teaching aid comprises a box 10 having in its upper surface groups of four apertures, each group corresponding to a presented question and each aperture corresponding to a possible answer, a guide plate 15 having corresponding apertures, a removable master plate 19 having apertures at those positions corresponding to correct answers, a sheet of paper or like material placed between the upper surface and the guide plate, and a stylus 21 having a point 22. Each attempt to answer a question will be indicated by the point of the stylus piercing the sheet, but a correct answer will be indicated by the shoulder of the stylus passing through the sheet. Audible or visible indicating devices, or counting devices may be used. For example, the point 82 of the stylus and the master plate may be made of metal and so connected in an electrical circuit with a buzzer or counter that selection of an incorrect answer will activate the buzzer or counter.
Patent GB-1292985-A (GB)
Title: Process for the production of polymeric olefin oxides having high molecular weights
Inventor: GUENTHER PETER
IPC: C08G65/12
Filed: 1969-09-17
Abstract: 1292985 Polymerizing olefin oxides FARBENFABRIKEN BAYER AG 17 Sept 1969 [23 Oct 1968] 45783/69 Heading C3R [Also in Division B1] Olefin oxides are polymerized in the presence of a catalyst prepared by reducing with a metal alkyl compound of the 2nd or 3rd Group of the Periodic Table a mixture of a transition metal compound and an acid amide. Suitable metal alkyl compounds are alkyl magnesium and aluminium halides, dialkyl zinc and trialkyl aluminium. Suitable transition metal compounds are salts of inorganic and organic acids and chelates of metals of the 4th to 8th secondary Groups, e.g. halides, nitrates, acetates and #-ketoenolates of Ti, Va, Cr, Mn, Co and Ni. Examples of amides are the alkylated amides of phosphonic and phosphoric acids, e.g. hexamethyl phosphoric acid triamide. The transition metal compound may be dissolved or suspended in a solvent, the amide added, followed by the metal alkyl compound. Specified olefin oxides are ethylene, propylene, butene, cyclopentene, cyclohexene, cyclododecene and styrene oxides, epichlorhydrin, epibromohydrin and allyl and phenyl glycidyl ethers. Proportions between the catalyst components and between the catalyst and olefin oxide may vary considerably but the preferred molar ratios are amide : transition metal compound : metal alkyl : olefin oxide = 5 : 10 : 25 : 1000.
Patent GB-1185608-A (GB)
Title: Apparatus for Measuring Liquid Density
IPC: G01N9/26
Filed: 1968-09-26
Abstract: 1,185,608. Measuring the densities of liquids. ALFA-LAVAL A. B. Sept.26, 1968 [Sept. 26, 1967], No. 45801/68. Heading G1S. The liquid whose density is to be measured, hereafter called a process liquid, enters a closed container 1 through an inlet 2 and exits via outlets 3. A reference liquid such as water is held within a closed container 4 provided at the top with a membrane 5 which is able to transmit pressure between the process liquid and the reference liquid. The pressures of the two liquids, which are related to their densities, are measured at the same horizontal level by sensors connected to pressure sensing means 6 e.g. a pressure difference transducer connected to a recorder 7. The container 1 may be of uniform cross-section and shaped to form the four sides of a rectangle whilst the inner container is positioned within one of the vertical sides of the rectangle.
Patent GB-1398250-A (GB)
Title: Electrically controlled fuel injection systems for diesel engines
IPC: F02D41/40
Filed: 1973-10-02
Abstract: 1398250 Automatic fuel injection control ROBERT BOSCH GmbH 2 Oct 1973 [3 Oct 1972] 45886/73 Heading G3N In a fuel injection system for a diesel engine 10, Fig.1, wherein solenoid controlled valves 11  are sequentially energized via a distributor 17, the valve opening pulse Jv from a power transistor 18 is controlled in accordance with the rotary speed of the engine, measured in a unit 30, which determines the injection angle, and the pressure in the inlet manifold 24, measured in a unit 20, which determines the injection duration.  The control unit 20 consists of a monostable multi-vibrator whose input transistor 21 is blocked by a step voltage 31 to allow transistor 22, 18 to conduct. The collector current of transistor 22 whilst it is increasing, produces a feedback voltage in winding 33 of transformer 23 dependent on the transformer mutual inductance which is controlled by the inlet manifold pressure, and determines the duration of the output pulse J V . The pulse duration may additionally depend on the temperature of e.g. the cooling water and/or the engine speed.  The unit 30 is operated by pulses derived by cam switches S1, S2 driven in synchronism with the engine. The cam switch S 1  produces a pulse, in advance from cam switch S 2  by a pre-set angle α, which after differentiation at 44, Fig.3, triggers a monostable multi-vibrator 43 with a period of T 1 . At the end of this period the trailing edge of the output current, after differentiation at 46, triggers a bi-stable multi-vibrator 47 to block a transistor 48 and charge a capacitor 50 through a constant current device 49. The pulse from cam switch S 2  following after an angular delay α, is differentiated at 54 to reset the bi-stable multi-vibrator 47. Hence transistor 48 is opened, and capacitor 50 discharges through constant current device 52, whilst transistor 51 is blocked. When capacitor 50 is discharged, transistor 51 reopens to produce the step voltage 31 for unit 20. This cycle is repeated as the cam switches rotate with the engine. Since the periodic time T of monostable multi-vibrator 43 is fixed and the time between operation of cam switches S 1 , S 2  depends on the engine speed, the timing of the step voltage 31, and hence the beginning of the injection pulse Jv, is also varied with engine speed. The timing device represented by the capacitor 50 and its charge and discharge circuits may be replaced by a reversible counter 70, Fig.4, counting up speed information pulses JD from transducer 80, 81 when the trailing edge of the pulse from monostable multivibrator 43 occurs and counting down when the bi-stable multi-vibrator 47 is reset. At the end of the countdown the step voltage 31 is produced.