baber/WOPTO huggingface dataset:
Patent GB-673562-A (GB)
Title: Multistage broad band signal-translating system
IPC: H03F1/50
Filed: 1950-06-22
Abstract: 673,562. Valve amplifying circuits. HAZELTINE CORPORATION. June 22, 1950 [Aug. 6, 1949], No. 15648/50. Class 40 (vi). A broad - band amplifier having a power characteristic which varies in a predetermined manner in dependence upon the frequency of the input signals comprises two repeater stages which have oppositely varying amplitudefrequency characteristics so that the overall frequency response is substantially flat while the power handling capacity of the system is increased in that portion of the frequency band where maximum power output is required; Fig. 1 shows the application of such an amplifier as the video amplifier 19 in an otherwise conventional television receiver. Input video signals from detector 16 are applied to the input of stage 20, the anode circuit of which comprises a broad-band filter network 21-24 which has an effective shunt impedance which is 1/K times that of the impedance which would produce a flat amplitude frequency response in the stage over the required pass band of the amplifier where K is a constant greater than unity. The stage 20 thus has a response as illustrated in curve B of Fig. 2. The signal at the anode circuit of stage 20 is applied via the broad-band coupling 37, 38 to a second stage 32 the anode circuit of which comprises a broad-band filter 34-36 which has an effective shunt impedance which is K times that required to produce a flat frequency response in the stage. The stage thus has a response as shown in curve C of Fig. 2 so that the amplifier has an overall response which is substantially flat, Fig. 2 (curve D). The energy distribution of the video frequency signals at the input to amplifier stage 19 is not uniform over the frequency band it is required to handle but is greatest in the lower frequencies so that By increasing the effective impedance of the anode load of stage 32 as previously described the power handling capacity of this stage is considerably increased whilst maintaining the overall response of the amplifier substantially flat. Preferably the resistors 21 and 34 have values 1/K and K times respectively the normal values which they would have to produce a flat amplitude/frequency characteristic.
Patent GB-840849-A (GB)
Title: Devices for mounting curtain wires
Inventor: SHURY DOUGLAS JULIAN
IPC: A47H3/12
Filed: 1956-05-22
Abstract: 840,849. Suspending curtains. SHURY, L. J. Aug. 13, 1956 [May 22, 1956], No. 15723/56. Class 52(5) [Also in Group XXV] An anchorage or guide for the end or intermediate part of a curtain wire &c. comprises an angle plate having a limb 2, for mounting on a window frame, and a limb 1 from which spaced lugs are pressed, the lugs having shanks 5 which are bent to form hooks 4 with mouths 6 facing the limb 1 and, preferably, at the rear side of the shanks.
Patent GB-779307-A (GB)
Title: Improvements relating to hygrometers
IPC: G01N25/68
Filed: 1955-06-09
Abstract: 779,307. Electric hygrometers. COMMONWEALTH SCIENTIFIC & INDUSTRIAL RESEARCH ORGANISATION. June 1, 1955 [June 9, 1954], No. 15755/55. Class 40 (1). [Also in Group XXXVI] Apparatus for determining the humidity of a gas comprises means for controlling and measuring the temperature at which the surface resistance of an ionic substance in crystalline form exposed to the gas and at the same temperature attains a constant value. Suitable ionic substances are potassium sulphate, potassium chloride, sodium chloride and calcium chloride. As shown, the measuring cell comprises a cylinder 11 (Fig. 4) supported in thermal insulation 13, the cylinder wall having two interleaved sets of axial, circumferentially spaced holes, the one set being fed with a gaseous or liquid refrigerant from a pipe 16 at the bottom of the cylinder 11 and exhausted at the top, and the other set of holes 27 connecting the bore of the cylinder 11 with the gas to be tested via a pipe 30. The cylinder is heated by current through two windings 23, 24, and the temperature is determined by measuring the resistance of two further windings 25, 26. A crystal 34 of ionic substance is located inside the cylinder 11 between two contact electrodes 33, 35 of graphite or platinum, contact being maintained by a springy wire 36. In operation the current through the heating windings 23, 24 is reduced until the resistance between electrodes 33, 35, preferably measured in an A.C. bridge circuit, falls to a substantially constant value, when the temperature as determined from the resistance of windings 25, 26 indicates the humidity of the gas. The surface conductivity of the crystal may be measured at radio frequency, the impedance between the electrodes, which need not be in contact with the crystal, being equivalent to a capacitance in parallel with a resistance which is initially very high and falls to a constant value at the dew-point temperature. A bridge circuit for measuring the resistive component of the impedance is given (see Group XXXVI), and the measuring voltage may be used to control automatically the heating of coils 23, 24 or the supply of refrigerant.
Patent GB-575501-A (GB)
Title: Improvements in or relating to centrifugal separating apparatus
IPC: B04B11/08
Filed: 1944-08-17
Abstract: 575,501. Centrifugal machines. VAUDIN, A. H. Aug. 17, 1944, No. 15760. [Class 23] In a separator having a rotary foraminous basket 1 for separating molasses or syrup from the crystals of sugar, a scoop 4 is arranged to draw off the inner layer of molasses from the layer of crystals formed on the wall of the basket. Other molasses passes through the basket in the normal way. A flanged screen 13 is provided. A spring 10 keeps the outlet pipe 6 under strain, so that the scoop bears on the crystal layer. The lip of the scoop is rounded.
Patent GB-551233-A (GB)
Title: Improved electric relay devices
IPC: H01H57/00
Filed: 1941-12-08
Abstract: 551,233. Electrostatic switches. DAVIS, N. R., and SUN-VIC CONTROLS, Ltd. Dec. 8, 1941, No. 15819. [Class 38 (v)] [Also in Group XL] Contacts 10, 11 are made to open or close by flexing or distortion of two piezoelectric plates 1, 2, according to the voltage impressed between conducting layers 3, 4 and a central layer 5, across the plates. In the example, voltage from a current source 20, 22 is modified by the action of a photoelectric cell 21 in series with a high resistance 23, and is dependent on the action of light on the cell, current being supplied to a load 24 accordingly. The piezo-electric plates and the contacts are enclosed in a casing that may be evacuated or gas filled, and in a modification the resistance and the photo-cell are also enclosed. In a further modification the plates are cut so as to twist instead of bend.
Patent GB-1117521-A (GB)
Title: Improvements in or relating to variable speed drives
Inventor: EMERSON REGINALD STANLEY
IPC: F16H9/16
Filed: 1965-04-13
Abstract: 1,117,521. Motor driving arrangements. LESLIE HARTRIDGE Ltd. 12 April, 1966 [13 April, 1965], No. 15824/65. Heading H2A. [Also in Division F2] A variable-speed expanding V-belt pulley gear, for bench testing I.C. engine fuel and feed pumps 10, is entirely supported by the shaft 28 and casing 34 of the electric driving motor 30, to form a unit readily-removable from the test bench. The driving pulley 26 and spring- loaded driven pulley 22 are mounted respectively on the motor shaft 28 and a bracket support 36, 50, 52 secured cantilever fashion to the motor casing 34 by a pair of inverted V- yokes 38, 40 bolted at 42 into a tapped hole 46, usually provided in the motor casing for a lifting eye-bolt, or, one or more additional tapped holes therein. Control of the pulley gear is effected by a lever 54 having a nut 62 at one end moved by a threaded rod 58 manually operated by a handle 60, one or both flanges of the driving and driven pulleys being axially movable to effect ratio change. Drive to the test pump 10 is via a plain belt drive 16 driven from the spindle 20 of the expanding pulley 22.
Patent GB-571062-A (GB)
Title: Improvement in method of and apparatus for coating wire
IPC: B05C3/15
Filed: 1943-09-27
Abstract: 571,062. Coating wire. GENERAL CABLE CORPORATION. Sept. 27, 1943. No. 15842. Convention date, Sept. 10, 1942. [Class 140] Wire is coated with material, such as enamel, supplied from a pool, by passing one or more free strands of the wire through a shallow, elongated stream of the material against the flow of the stream, continuously supplying clean material in excess from the pool to the point where the wire emerges from the stream, and continuously removing and returning to the pool excess material from the other end of the stream. The remaining coating may therafter be hardened. The coating apparatus may include a plate over the surface of which the wire moves, and means for supplying the material so that it flows over said surface. In the apparatus shown, the wire is fed from a spool 20 in parallel loops around lower and upper sets of sheaves 22, 23 and thence to a take-up spool 24. The upwardly-moving strands pass over the surface of a vertical plate 32 which may, if the wire is thick, have grooves to accommodate it, and over said surface there descends from a supply trough 34 a stream of enamel through which the strands pass. The base 40 of plate 32 is curved to direct surplus enamel to a trough 41 from which it is piped to a sump 44 containing a pump 45 for transferring it back by way of a filter 51 to the supply trough 34. The plate 32 may have a removable cover 53 which may be transparent, and the enamel may be kept hot by a heater on the back of the plate or in the sump 44. Excess enamel on the wire after it leaves the coating zone may be removed by a verticallyadjustable wiper 54 comprising a driven roller 55 and a scraper 56 therefore, the excess being piped back to the sump 44. The coated strands pass through an oven 30 between the coating zone and the upper sheaves to harden the enamel. Specification 547,311 is referred to.
Patent GB-570334-A (GB)
Title: Improvements in electric hot plates
IPC: H05B3/72
Filed: 1943-09-28
Abstract: 570,334. Electric hot plates. REVO ELECTRIC CO., Ltd., REEVES, F. H. and HARDING, A. N. Sept. 28, 1943, No. 15859. [Class 39 (iii)] In an electric hot plate manufactured generally as described in Specification 522,427, the upper surface is formed as a grooved disc a in which refractory insulating material c is placed and then grooved to receive a loaded helical heating resistance b. The groove is filled in with further insulation, and a flat closure plate d is added. The arrangement of plates a, d may be inverted. Specifications 515,560 and 522,610 also are referred to:
Patent GB-158678-A (GB)
Abstract: 158,678. Bell, G. W. Nov. 8, 1919. Non-metallic elastic bodies and cores; tyre attachments to rims.-A soft rubber core 18 shaped to fit within the tread of a tyre cover 15 is formed with a central pillar 20 and spaced pillars or ribs 19 adapted to bear on the inclined faceas 12 of a seating-ring 6. The edges of the cover are clamped between the ring 6 and the rim-flanges 3, 4, the flange 4 being detachably secured by transverse bolts 5. The ring 6, which may be formed of wood, hard rubber, or metal, is open-ended, a filling-piece 9, Fig. 3, being secured by means of a plate 10 and screws 11. The filling-piece is recessed to take a driving-lug 30 on the rim 2. The relative dimensions of the core 18 and ring 6 are such that the core is compressed within the cover in assemblage.
Patent GB-1374471-A (GB)
Title: Azetidinone derivatives
IPC: C07D205/095
Filed: 1971-05-19
Abstract: 1374471 Azetidinone derivatives and a process for their preparation GLAXO LABORATORIES Ltd 2 Nov 1971 [19 May 1971 3 Nov 1970] 15869/71 and 50197/71 Divided out of 1368235 Heading C2C The invention comprises a process for the preparation of compounds of general Formula IV wherein R<SP>2b</SP> is a group of Formula (I)  in which R<SP>4</SP> is a carboxyl or blocked carboxyl group and R<SP>6</SP> is a hydrogen atom or an aliphatic, araliphatic or aromatic group, and either R<SP>1a</SP> is an amino group or a blocked amino group and R<SP>3b</SP> is an acyl group (including a sulphonyl, sulphinyl or phosphoryl group), an aliphatic, aromatic or araliphatic group or a group -SR<SP>5</SP> where R<SP>5</SP> is an optionally substituted aliphatic, araliphatic or aromatic group or a group of Formula II in which R<SP>1</SP> is an amino or a blocked amino group and R<SP>2b</SP> has the above meaning, or R<SP>1a</SP> and R<SP>3b</SP> together with the sulphur atom to which R<SP>3b</SP> is attached form a group or where R is the residue of an acyl group RCO- containing 1-21 carbon atoms which comprises reacting a compound of general Formula (III) [in which R<SP>2</SP> is a group where R<SP>4</SP> is as above defined and either R<SP>1a</SP> is an amino or blocked amino group and R<SP>3a</SP> is an acyl group (including a sulphinyl, sulphonyl or phosphoryl group), an aliphatic, araliphatic or aromatic group or a group -SR<SP>5</SP>, where R<SP>6</SP> is an optionally substituted aliphatic, araliphatic or aromatic group or a group of the Formula (V) or R<SP>1a</SP> and R<SP>3a</SP> together with the sulphur atom to which R<SP>3a</SP> is attached form a group or where R has the above meaning] with a diazo reagent of formula R<SP>6</SP>CH-N 2  where R<SP>6</SP> is as defined above. The invention also comprises novel compounds (IV) wherein R<SP>3b</SP> is other than -SR<SP>5</SP>.
Patent GB-920385-A (GB)
Title: Improvements in and relating to crankshafts
IPC: F16C3/12
Filed: 1961-05-02
Abstract: 920,385. Crank-shafts. CESKOSLOVENSKE ZAVODY NAFTOVYCH MOTORU PRAHA, NARODNI PODNIK. May 2, 1961 [May 7, 1960], No. 15917/61. Class 80 (2). In a divided crank-shaft wherein the two parts A, B are held together by a screw 10, radially disposed pins 5 are located in partcylindrical recesses 3 in the end faces of the two parts of the crank-pin 1. A sleeve 7 which is a push fit within the crank-pin 1 closes the inner ends of the recesses 3. The screw 10 has unequal pitch threads 11 which draw the two parts together and into engagement with the pins 5.
Patent GB-624231-A (GB)
Title: Improvements in mixing machines
IPC: A47J43/044
Filed: 1947-06-18
Abstract: 624,231. Mixing machines. ALLAWAY, R. A. and BATTIN, T. H. June 18, 1947, No. 16010. [Class 86] A mixing machine of the type com prising a vertical spindle driven by ar electric motor mounted on a stand, is provided with a platform for the container which is pivoted to allow the container to be removed A platform 5 provided with a series of concentric recesses 10 for receiving various sizes of container is pivoted at one corner 6 to the stand 2, by means of a pivot pin 7. A friction spring washer 8 is provided for holding the platform in any position.
Patent GB-1433982-A (GB)
Title: Under-driven rotary scythe mower gear box carrying rotary scythe mower rotors
IPC: A01D34/66
Filed: 1974-04-11
Abstract: 1433982 Rotary scythe mower under drive KUHN SA 11 April 1974 [7 May 1973] 16092/74 Heading A1F An under driven rotary scythe mower comprises a two part gear box (2, 3) which carries mower rotors, e.g. 7, 8, and which houses a train of pinions 12, 14. The pinions 14 between adjacent mower rotor pinions 12: are rotatably mounted upon female members 15 secured to the upper half 2 of the gear box. Male members 16, secured to the lower box half 3, fit within the female members and have a screw-aperture to receive a holding screw 18. A sealing packing 20 is positioned between the members. After tightening of the screw 18 some lateral play still exists between the members. The mower blades 11 are centrifugally operated.
Patent GB-137245-A (GB)
Title: Improvements in removable buttons
IPC: A44B1/30
Filed: 1919-06-26
Abstract: 137,245. Jacoby, A. J. June 26, 1919. Buttons.-A removable button of the kind used as a rank badge or the like comprises a display portion 2, Fig. 1, having a central screw-threaded stem 3, the thread being formed with a square abutment face and an angular portion sloping away from the button face 2. The button is secured to the cloth by a radially split washer 4 having a beaded edge 9 to retain a supporting- disk 6 which rotates on the washer and has stamped-out projections 8 for preventing rotation of the button on the cloth, the supporting-disk also having an inwardly flanged central aperture 7 the edges of which do not engage the threaded stem. In attaching, the washer 4 with disk 6 is pushed over the stem 3 and, if necessary, is tightened by rotation. In a modification, Fig. 4, the thread-engaging portion 4 of the washer is formed integral with an apertured supporting- portion 10 by bending a blank, and the disk 6 is rotatably mounted on the portion 10 and secured by beading the edge of the aperture 7.
Patent GB-1502045-A (GB)
Title: Preparation of ethylbenzene hydroperoxide
IPC: C07C409/06
Filed: 1976-04-21
Abstract: 1502045 Preparation of ethyibenzene hydroperoxide HALCON INTERNATIONAL Inc 21 April 1976 [21 April 1975] 16164/76 Heading C2C A process for the preparation of ethylbenzene hydroperoxide by liquid phase molecular oxygen oxidation of ethylbenzene comprises introducing liquid ethylbenzene and molecular oxygen into a reaction zone and withdrawing a liquid stream containing the hydroperoxide from said zone, removing vapours containing non-condensible inert gases from said reaction zone, separating condensible components from said vapours and regulating the reaction temperature within said zone by controlled recycle of said non-condensible gases to said zone. In one preferred embodiment of the invention, the liquid ethylbenzene is introduced into the first of a plurality of reaction zones connected together in series and the liquid stream containing the hydroperoxide is withdrawn from the last of said zones, vapours containing non-condensible inert gases are removed from each of said zones, and the reaction temperature within at least one of said zones is regulated by controlled recycle of said non-condensible gases to said zones. The hydroperoxides obtained by the present process may be reacted with olefins in the presence of a catalyst to produce epoxides, particularly propylene oxide.
Patent GB-595033-A (GB)
Title: Improvements in or relating to the production of labels
IPC: G09F3/04
Filed: 1945-06-25
Abstract: A label or sheet consists of a front of substantially non - thermoplastic, non - metallic material coated at its back with a layer consisting at least partly of a water-insoluble thermoplastic material together with between 10 and 20 per cent of an initial condensation product of a thermosetting resin.  The mixture of thermoplastic and thermosetting materials may be applied to the back of the fabric as a pre-formed film.  Suitable thermoplastics are polymerized methyl methacrylate, polymers of other esters of methacrylic and acrylic acids, polymerized vinyl resins and thermoplastic chlorinated natural and synthetic rubber. Suitable thermosetting materials are those derived from the condensation of aldehydes with urea, thio-urea and its derivatives, or from the condensation of aldehydes and aniline or from phenol aldehyde condensation products or from aldehydes and acetone.  Filaments or yarn for the warp of a fabric of plasticised polyvinyl acetate fibres may be used, the weft consisting of cotton and the initial condensation product of the thermosetting resin may be applied by impregnating the web or incorporated in the spinning solution. Specification 574,459 is referred to.
Patent GB-161933-A (GB)
Abstract: 161,933. Siemens & Halske Akt.-Ges. April 15, 1920, [Convention date]. Automatic exchange sys:- tems. - In operating a second group-selector from a first group-selector over a two-wire trunk, a relay winding and a source of potential are included in the outgoing end of the bwire of the trunk, the relay being energized in series with the test relay in the c-wire of the second groupselector when the latter finds an idle line of the selected group. In the system shown, the calling subscriber is connected by a preliminary selector VW to an idle first group-selector IGW which operates in the usual manner to hunt for an idle line in the selected level. When the test wiper c1 reaches the test terminal call of an idle second group-selector IIGW, the test relay P and the relay W energize in series to connect through the a- and b-wires at armatures 2, 3 and to prepare the circuit for the winding II of the relay E. The second set of impulses are repeated by the relay A over the a-wire of the selector IGW to the relay J which controls the numerical operation of the second selector IIGW. The test circuit for the hunting operation of this selector includes the battery 13, winding I of relay E, the b-wire of the two-wire trunk VL and the test relay P, in the c-wire of the selector IIGW. When the test wiper c2 reaches an dle test terminal c2<SP>1>, relay E energizes in series with relay P1, and disconnects the battery 13 fom the b-wire, locks up over its winding II and connects through the b-wire by closing contact @12 and short-circuiting its winding I. Relay P1 disconnects itself from the b-wire, locks up, and completes the a- and bcircuits at contacts 7, 6. When the calling subscriber hangs up, relays A V fall back and energize the release magnet M over the off-normal contact 16. The selector IGW returns to normal and releases the relay W which opens the locking circuit for the relay E, and the selector IIGW returns to normal in known manner.
Patent GB-1103549-A (GB)
Title: Improvements relating to current sensitive electric relays
Inventor: FREEMAN ALAN TWEMLOW
IPC: H01H71/32
Filed: 1964-04-20
Abstract: 1,103,549. Electromagnetic relays. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. 16 June, 1965 [20 April, 1964], No. 16273/64. Heading HlN. [Also in Division H2] Current through a conductor 11 clamped between magnetic parts 3, 4, 3 causes attraction of a spring-loaded armature 6 to operate contacts 9. The weatherproof casing 1 may be secured to the cable by clamps 12. The armature springs may be adjusted to set the operating current. The speed of operation may be controlled by devices such as dash-pots and one of parts 3, 4, 3 may be polarized.