baber/WOPTO huggingface dataset:
Patent GB-1315600-A (GB)
Title: Magnetic tape transport arrangements
IPC: H02P5/48
Filed: 1971-08-05
Abstract: 1315600 Automatic control of magnetic tape systems SIEMENS AG 5 Aug 1971 [23 Sept 1970] 36752/71 Heading G3R Transport of a magnetic tape is controlled by regulating the position of a loop in a buffer device. Driving and braking torque are applied to a supply or take-up reel in such a way as to minimize the variations in loop size. In the system shown, tape 2 passes from a supply reel 1 into a buffer 3. The loop position is detected by a sensor 4 which determines whether a motor 5 or a brake 6 is energized. When the loop height S, Fig.4, rises above the sensor 4, motor torque Mm is applied at a high initial level for a predetermined time and subsequently at a low level until the loop falls below the sensor. Now, braking Bm is applied, initially at a high torque level and subsequently at a low level. The method of control enables fast rewind operation to be carried out with a relatively short buffer device.
Patent GB-1391377-A (GB)
Title: Multi-speed transmissions
IPC: F16D25/0638
Filed: 1973-08-03
Abstract: 1391377 Friction clutches; change-speed gear; full-face disc brakes; pistons GENERAL MOTORS CORP 3 Aug 1973 [14 Sept 1972] 36978/73 Headings F2C F2D F2E and F2T In a multi-speed transmission the pistons for engaging multi-disc clutches or brakes each comprise an annular shell member 44 (Fig. 3), 98 (Fig. 4), having a pair of concentric annular support surfaces to each of which is fixed an annular retainer 58, 66 (Fig. 3), 108, 116 (Fig. 4), defining with the shell member 44, 98 an annular groove in which is fitted a sealing ring 60, 68 (Fig. 3), 110, 118 (Fig. 4), these sealing rings engaging inner and outer walls of chambers in which pistons move under hydraulic pressure. In the piston shown in Fig. 3, for clutch engagement a convoluted split spring ring 52 fitted in a channel 50 of the piston acts on the clutch plate to apply the clutch and a retainer 71 welded to the piston has axially extending tabs 72 about each of which a helical piston return spring is mounted. This piston may define two chambers in the transmission, a wall of the housing having a sealing ring acting on the axially extending annular piston wall radially inwards of channel 50 (Fig. 1, not shown). In the piston shown in Fig. 4, brake disengaging springs 136 are mounted in axially extending portions 132 of an annular plastics material spring guide 128 (see Figs. 5 and 6, not shown). Change-speed gear.-In the change-speed gear shown in Fig. 1, for providing three forward speeds and one reverse the output from turbine 32 passes to a drum 34 and then through a clutch 14 to an intermediate shaft 40 splined to the ring gear 146 of a first planetary gearset, or through a clutch 16, a drum 88 and a shaft 91 to the sun gears 154, 156 of the gearsets, the drum 88 (and so the sun gears), being capable of being braked by a band brake 26 or a one-way brake 22, this latter operating when a brake 18 is engaged. The planet carrier 160 of the second gearset (that with sun 156), can be braked by a band brake 25 and is also provided with a oneway brake 20. The output from the transmission is via a shaft 152 from the ring gear 162 of the second gearset and the planet carrier 150 of the first (which comprise one member). The manner of operation of the clutches 14, 16 and the brakes 18, 25, 26 to achieve the various speeds is not described.
Patent GB-1267410-A (GB)
Title: Switched filter networks
Inventor: BRANDON MARTIN
IPC: G01S13/34
Filed: 1969-07-23
Abstract: 1,267,410. Radar. STANDARD TELEPHONES & CABLES Ltd. 23 July, 1969, No. 36985/69. Heading H4D. [Also in Division G1] In a switched filter network for use in a f.m. altimeter for detecting and measuring the lowest frequency signal from a group of such signals whose amplitude is above a given level, there is provided a series of band pass filters each having a pass band overlapping the pass bands of adjacent filters and each providing a peak output exceeding that of the preceding lower frequency filter in the series when a constant amplitude swept frequency signal is applied to all the filter inputs. In response to a particular input signal applied to all the filters, the peak output amplitude of the series is detected. From this detected amplitude is derived a threshold level lower than the peak. The filter outputs are then scanned sequentially starting from that with the lowest pass band, and the first scanned filter to produce an output signal in excess of the threshold is selected and switched to a frequency measuring arrangement. Signals from an oscillator OSC (Fig. 3) are applied both to a counter C1 whose most significant digit output is used to control the scan of an f.m. transmitter and via a NAND gate C1 to a counter C2, whose output is used to control the scan of switches 22 (Fig. 2) to connect the outputs of filters receiving the returned f.m. signal in turn to a peak level circuit 23. The output from this, after appropriate attenuation at 26, is applied as a threshold reference level with which to compare the filter outputs. On a second scan, the first output to exceed the threshold level initiates a detector pulse which is applied to a gate G4 in the control logic of a module 3 counter to initiate a set output from a gate G7. This enables a bi-stable circuit FF 1/4 to provide an appropriate set code which is applied to gates 21 to pass the output of the appropriate filter to a ratemeter. The modulo 3 counter is restored to a 0 condition by a pulse from the second significant stage of the counter C1. The filters take the form of frequency selective amplifiers, e.g. based on transistor T1 (Fig. 4, not shown) whose input circuit RC1 has a high frequency pass band, and whose emitter output circuit RC2 has a low frequency band, the collector output of the transistor being connected to the next filter in the sequence. The output from RC2 is compared with the threshold level at PR 2  and a noise threshold at PR 1  before being passed to the output. An alternative circuit (Fig. 5) uses an LC network in the collector of a transistor T2.
Patent GB-350398-A (GB)
Title: Improvements in or relating to fertilisers
IPC: C05F11/00
Filed: 1929-12-03
Abstract: Fleshy plants of aquatic growth, for example Zostera, Posidonia, or Ruppia, are impregnated with dilute sulphuric or other acid and formed into a sheet or band for use as a fertilizer.  The sheet may be placed on the ground between the stalks or may cover the ground, apertures being pierced for the stalks.  The aquatic plants may be subjected to a preliminary drying, then immersed for a short time in the acid and afterwards spread on racks and allowed to dry.  Or the fresh plants may be spread on the racks and immersed while on the racks.  The material is rendered adhesive by the acid and sheets are formed without mechanical treatment.  In large scale manufacture, however, roller machines of the kind used in paper manufacture may be employed. The potash content of the product may be increased by immersing it in the washing water of fresh Zostera.  For use where rainfall is heavy the sheets may be coated or impregnated with a solution of sodium silicate.  Phosphates or nitrates may be added to the fertilizer.
Patent GB-503669-A (GB)
Title: Improvements in or relating to pitot tubes
IPC: G01P5/165
Filed: 1938-01-10
Abstract: 503,669. Pitot -- tube apparatus. KOLLSMAN, P. Jan. 10, 1938, No. 37103. Convention date, Feb. 9, 1937. Divided out of 503,646. [Class 69 (i)] A Pitot-tube comprises a dynamic duct 1 and a shell A enclosing at least a part of the duct 1 and having a static pressure opening 63, 64, the shell and duct being permanently united to form a one-piece metallic structure. The shell may be formed, and simultaneously united to the dynamic duct, by electrodeposition, as described in Specification 503,646,. which describes a Pitot-tube similar to that described in the present Specification.
Patent GB-619784-A (GB)
Title: Improvements in or relating to circuit-arrangements for the amplification of high-frequency electrical oscillations
IPC: H03F1/10
Filed: 1946-12-17
Abstract: 619,784. Valve amplifying circuits. PHILIPS LAMPS, Ltd. Dec. 17, 1946, No. 37153. Convention date, Aug. 4, 1943. [Class 40 (v)] A high-frequency amplifier comprises a valve with two or more cathode leads, one lead being resonated to the signal frequency by means of e series condenser 9, while the direct current passes through a second lead The second lead contains the bias resistance 10 which may be shunted with a condenser. With a directly-heated valve (Fig. 2, not shown), three cathode leads are employed.
Patent GB-326818-A (GB)
Title: A process for improving lead
IPC: C22C11/00
Filed: 1928-12-18
Abstract: 326,818. Imray, O. Y., (I. G. Farbenindustrie Akt.-Ges.). Dec. 18, 1928. Alloys.-To increase the resistance of lead to sulphuric acid it is alloyed with 0.01-0.05 per cent of nickel, with or without the addition of up to 0.1 per cent of selenium. An alloy of lead with 0.05-3.5 per cent of nickel is also referred to. The Provisional Specification describes also the addition of copper, silver, and tellurium.
Patent GB-894414-A (GB)
Title: Improvements relating to vibration damping arrangements in couplings between rotary objects
IPC: F16F15/14
Filed: 1959-11-05
Abstract: 894,414. Resilient couplings. DAIMLERBENZ A.G. Nov. 5, 1959 [Nov. 7, 1958], No. 37598/59. Class 80 (2). A flexible coupling comprises two torquetransmitting elements or sets of elements having differing flexibility and with a lostmotion connection so arranged that the less flexible element(s) become(s) effective only when the load torque reaches a predetermined value, after which rigid abutments become operative to prevent further stressing of the element(s) having the greater flexibility. As shown in Fig. 1, resilient discs 25, 26 are bonded to opposite sides of a central disc 24, stressing of element 26 being limited by the engagement of lugs 28, 29 on the input flange 20 and disc 24 through pads 27. In other arrangements the abutment is effected through a pin and slot connection, Figs. 2 and 4 (not shown). The invention may be applied to clutch discs (Figs. 6, 7 and 8, not shown), the construction shown in Fig. 6 comprising a disc 44 bonded between rubber annuli 46 and having a lostmotion connection 47 with a U-sectioned metal member 45 connected to the hub 51 through a further rubber annulus 49. In the arrangement according to Fig. 9, circumferentially disposed pairs of soft and hard rubber blocks 78, 80 are mounted between abutments 74 on the driving member 72 and abutments 75, 79 on the driven member 73, the elements 78 being ineffective after the abutments make contact. In the alternative embodiment shown in Fig. 11, the elements 89 secured to the driving member 72 are disposed transversely to operate in shear.
Patent GB-1443631-A (GB)
Title: Bag construction
IPC: B65D5/06
Filed: 1974-08-29
Abstract: 1443631 Bags E S KARDON 29 Aug 1974 [17 Sept 1973] 37793/74 Heading B8K A bag having a self-opening rectangular bottom and of the type having partial diamond folds and two slits in one side wall to form a flap that seals the bag bottom is characterized by the provision of tabs enabling the base to be opened to form a pouring spout. The bag has a heat sealable lining. Alternatively an adhesive may be used to secure together the lining faces. To dispense the contents, a flap 22 is lifted by tearing it away from the bag bottom and an area of flaps 24 marked "TAB" is pulled to open a seal along a line 32 to form the spout shown in Fig. 9.
Patent GB-325056-A (GB)
Title: Field magnet construction for dynamo electric machines
IPC: H02K23/02
Filed: 1928-12-21
Abstract: 325,056. Newton, F. Dec. 21, 1928. Cores and yokes. - A field magnet for a dynamo-electric machine is built up of laminations 1 of a material of low reluctance formed with straight edges nearly tangential to the polar arcs and having interpolar yokes 2 bounded by arcs concentric with the polar arcs, together with one or more plates 3 of similar form composed of material of high remanence. The plate 3 may be placed at one end of the laminations or among them, and is preferably of the thickness of several laminations. After assembly the field magnet is submitted to a high magneto-motive force with the magnetic circuit completed by a temporary armature and when this is removed the soft steel or iron laminations serve as a keeper for the permanently magnetized part. Specification 196,048 is referred to. According to the Provisional Specification, the permanent magnet is separated from the laminations by a spacer of non-magnetic material, for example, brass.
Patent GB-859530-A (GB)
Title: Portable sound-reproducing set and case
IPC: G11B33/02
Filed: 1958-11-24
Abstract: 859,530. Phonographs. EBNER, [nee STEIDINGER] H., [trading as PERPETUUMEBNER FABRIK FUR FEINMECHANIK UND ELEKTROTECHNIK STEIDINGER & CO. KOMM.-GES.]. Nov. 24, 1958 [Nov. 22, 1957; May 5, 1958; Sept. 24, 1958], No. 37817/58. Class 40 (2). [Also in Group XXXIX] A portable gramophone is provided with symmetrically placed loud-speakers, or groups -of loud-speakers, in the lid each side of a vertical centre line. The loud-speakers may comprise bass speakers 24a mounted flat, and treble speakers 22a mounted diagonally in the upper corners of the lid. Reproduction could also he from magnetic tape records.
Patent GB-889859-A (GB)
Title: Slush moulding process
IPC: B29C41/18
Filed: 1958-11-25
Abstract: In the moulding of a boot or other hollow article, a mould is partially filled in a tilted position with a gellable liquid, and any air bubbles in the toe or other recess allowed to escape before the mould is turned into an upright position and completely filled, heated to deposit a gelled layer on the inner surface of the mould, completely drained of liquid, and again heated to fuse the gelled layer to form the article which is stripped from the mould after cooling.  A boot or other hollow article having a roughened interior surface is obtained by spraying the gelled layer prior to fusing with powdered polyvinyl chloride, polyvinyl acetate, or a vinyl chloride-vinyl acetate copolymer.  To obtain an article having a thickened portion at a certain area (or more than one such portion) the mould is not completely drained after the initial gelling, and the residual ungelled liquid is distributed over the desired area or areas by tilting the mould to and fro while heating it to completely gel the residual liquid.  A further layer of a gelled material may be applied over the whole interior surface of the mould prior to fusing, for providing insulation, decoration, or reinforcement of the boot or other article.
Patent GB-627617-A (GB)
Title: Improvements in and relating to propelling pencils
IPC: B43K21/16
Filed: 1946-12-30
Abstract: 627,617. Propelling pencils. FABRIQUE SUISSE DE CRAYONS CARAN D'ACHE SOC. ANON., Dec. 30, 1946, No. 37990. Convention date, March 13. [Class 146 (iii)] In a propelling pencil a lead guide tube 3 has clamping jaws 4 projecting from a casing 1 and urged rearwardly into a conical bore 2 by a spring 5, an annular ring 15 being slidably mounted on the tube 3 and carrying jaws  12 mounted on resilient arms 14 which grip the lead 8 through longitudinal slots 13 in the tube 3. The upper end of the tube 3 forms a magazine 6 having an operating knob 7. By depression of the knob 7 the tube 3 and jaws 4 advance a corresponding distance until a shoulder 11 on the magazine engages the ring 15 which is then advanced with the tube 3 so that the arms 14 pass into a reduced bore 19 in the casing 1 and cause the jaws 12 to grip the lead and feed it forward relatively to the casing 1. During the forward movement the jaws 4 leave the conical bore 2 and their grip on the lead is relaxed. On release of the knob 7 the jaws 4 and the tube 3 are retracted by the spring 5 while the jaws 12 gripping the lead 8 are held by the arms 14 which frictionally engage the reduced bore 19 until the jaws 12 are retracted by an abutment 10 on the tube 13. In a modification a sleeve is inserted in the casing 1 in place of providing the casing with a reduced bore 19.
Patent GB-899734-A (GB)
Title: Bearing
Inventor: EUWE GERRIT EVERT
IPC: F16D65/22
Filed: 1957-12-06
Abstract: 899,734. Bearings. UNILEVER Ltd. Nov. 28, 1958 [Dec. 6, 1957], No. 37996/57. Class 12 (1). [Also in Group XXX] A bearing bush particularly for a roller 7 of a roller conveyer is made of a moisture-absorbent synthetic or natural plastics material and comprises inner and outer sleeves 1, 2 and a connecting portion 3 extending from opposite ends of the sleeves. The bush may be of nylon or polyurethane with additives such as graphite, polytetrafluorethylene or molybdenumdisulphide.
Patent GB-325638-A (GB)
Title: Improvements in means for applying a surface coating to pencils and the like
IPC: B43K19/16
Filed: 1928-12-24
Abstract: 325,638. Anglo Pencil Co., Ltd., and Smith, M. Dec. 24, 1928. Coating-machines.-Apparatus for coating pencils and similarly shaped articles comprises a rotary drum having rows of U-shaped spring clips 5 to hold the pencils &c. at such an angle that they are vertical on withdrawal from vertically adjustable vats 8, containing coating liquid &c. The pencils may be rotated on their axes by mounting the clips 5 rotatably on bars 6. Rotation is imparted by ratchets 9 engaging pinions 10 on the clips 5. The ratchets are moved, as the drum rotates, by fixed cams 11 ond 12. For continuous operation the clips are arranged helically on drums 1, Fig. 3, rotary and transverse motion being imparted by helical teeth 17 on the drums engaging gear wheels 14. The pencils may be fed from a hopper automatically by a travelling band and reciprocating charger.
Patent GB-1074457-A (GB)
Title: Improvements in or relating to voltage regulators
IPC: H02M3/156
Filed: 1964-09-18
Abstract: 1,074,457. Pulse modulation. SIEMENS A.G. Sept. 18, 1964 [Sept. 19, 1963], No. 38117/64. Heading H3T. [Also in Division G3] A D.C. load (not shown) is supplied from an A.C. source by way of a transformer Tr1, a rectifier Gr1, an indicator Dr with a freewheeling diode D1, and a transistor T1 which is switched on and off by rectangular control pulses having a constant frequency and a pulse width dependent on variations in the load voltage so that the duration of the conducting periods of the transistor is automatically controlled to maintain the load voltage constant. The control pulses are produced by a regulating circuit S as follows :-one output from a square wave generator T2, T3, Tr2 is applied by way of secondary winding III of transformer Tr2 to a bi-stable circuit T4, T5, and another output by way of winding IV to integrating circuits R6, C6, R7, C7 which produce a triangular waveform; a voltage proportional to the load voltage is derived from a circuit M, which comprises a bridge circuit with a Zener diode reference, and is also applied, over an amplifier T6, T7, to the bi-stable circuit T4, T5 together with the superimposed triangular waveform; the resulting output from the bi-stable circuit T4, T5 is in the form of control pulses having a constant frequency but of a pulse width dependent on the load voltage, and these pulses are applied to control the transistor T1. The operation of the regulating circuit S is described in detail with reference to Figs. 2a to 2d (not shown). The output circuit may include an ancillary converter to produce a high output voltage (Fig. 3, not shown).
Patent GB-884172-A (GB)
Title: Improvements in cutters for grass and like mowing machines
Inventor: HAYTER DOUGLAS RICHARD
IPC: A01D34/63
Filed: 1958-11-26
Abstract: 884,172. Rotary-scythe mowers. HAYTERS Ltd. April 24, 1959 [Nov. 26, 1958], No. 38122/58. Class 6(3). A rotary-scythe mower comprises a headplate 1 rotatable with a vertical shaft 11, the plate having downwardly-stepped peripheral portions 1b on which blades 5 are pivoted so as to be rotatable through 360 degrees without contacting one another, the blades consisting of elongated bars with sharpened lateral edges. The plate 1 is square, the corners being downwardly-stepped and reinforced by members 8. The head-plate is secured by rivets 9 to a flange 10 on the bottom of the tubular shaft 11 which is mounted in a casing 13 and driven by a beltpulley 14.
Patent GB-946314-A (GB)
Title: Improvements in soap tablets
Inventor: BILLS WILLIAM WALTER
IPC: C11D9/32
Filed: 1960-11-07
Abstract: Coated soap tablets are produced by dipping the tablets into an aqueous solution containing (a) a compound which forms on the tablets a lustrous, transparent, non-hygroscopic, water-soluble coating, and (b) a water-soluble aryl sulphonate selected from a benzene sulphonate substituted with two alkyl groups, one having 0-3 and the other 0-1 carbon atoms, a naphthalene sulphonate substituted with 0-3 methyl groups, and an anthracene sulphonate substituted with 0-3 methyl groups.  (a) is suitably polyvinyl alcohol or a water-soluble polyacrylate, while (b) is preferably sodium xylene or p-toluene sulphonate or potassium trimethylnaphthalene or dimethylanthracene sulphonate.  A thinning agent, e.g. ethanol or diethylene or hexylene glycol is generally also present in the dipping solution, as is a polyethylene glycol (M.W. 200) which assists in the dissolution of the film when the tablet is used. Specification 823,118 is referred to.
Patent GB-1164176-A (GB)
Title: Emulsion of Polymerization of Vinyl Compounds
IPC: C08F2/24
Filed: 1967-08-21
Abstract: 1,164,176. Emulsion polymerization. STAUFFER CHEMICAL CO. 21 Aug., 1967 [27 Sept., 1966], No. 38423/67. Heading C3P. Aqueous emulsion polymerization of an ethylenically unsaturated monomer is effected in the presence, as emulsifier, of an alkali metal or ammonium alkanoate, or alkyl sulphate or sulphonate having 5-9 carbons, which is added incrementally during the polymerization until polymerization is at least 20% complete, then there is added a C 10  + surfactant, and polymerization completed (if necessary). A total of 0.2-2.0% of monomer weight of C 5 -C 9  surfactant is added and when polymerization is 20-100% completed 0.05-0.5% of the C 10 + surfactant is added, also incrementally if desired. Stable lattices of narrow range particle size are obtained. A seed latex is preferably added. Water soluble peroxidic catalysts are preferred but redox or oil-soluble systems may be used. Examples describe the polymerization of vinyl chloride, which may also be added in stages, vinyl chloride-vinyl acetate, vinylidene chloride-acrylonitrile and vinyl chloride-cetyl vinyl ether; ammonium persulphate is used as catalyst.
Patent GB-1276358-A (GB)
Title: Improvements in or relating to test equipment
Inventor: PAYNE ROY DAVID
IPC: G01R23/10
Filed: 1969-08-01
Abstract: 1276358 Frequency testing STANDARD TELEPHONES & CABLES Ltd 29 July 1970 [1 Aug 1969] 38732/68 Heading G4H Apparatus for testing the frequency of, for example, oscillators includes a counter 7 preset to a number determined by the nominal value of the frequency being tested and an amplifier 1, squarer 2 and divide circuits 3, 4 via which the input signal is applied to enable gate G5 to pass clock pulses for one or more half-cycles of the square wave signal from circuit 4 to the counter 7, the difference between the measured count and the value which it should attain being indicated to give the deviation of the frequency. As described for testing frequencies of 1850 c/s., 1650 c/s., 1180 c/s. and 980 c/s. (for the first two of which circuit 4 divides by two), for each frequency an associated gate G1-G4 is enabled so that a matrix 8 presets counter 7 to the desired count. At the end of the measurement the count is read out to a decoder and shift register 13 controlling lamps 14 to display the magnitude and sense of the error.