baber/WOPTO huggingface dataset:
Patent GB-1502632-A (GB)
Title: Regulation of current converters
IPC: H02M7/757
Filed: 1975-02-06
Abstract: 1502632 Automatic control of current converters CONTRAVES ANTRIEBSTECHNIK AG 6 Feb 1975 [7 Feb 1974] 5188/75 Heading G3R A current regulator for anti-parallel controlled rectifier circuits supplying a D.C. motor includes an armature current sensor. The actual current is compared with a desired value to form an error signal which is modified by a signal dependent on the duration of discontinuities in the armature current in order to produce firing angle control signals for the rectifiers. As shown in Fig. 1, the speed of a D.C. motor M is controlled by a closed loop (not shown), which forms a desired armature current signal Is. The actual armature current is measured by a sensor arrangement Iw, and the actual and desired current signals IA, IS are fed through smoothing circuits G1, G2 to a controller S with a proportional-plus-integral characteristic. The resulting error signal UR is fed through a summing amplifier V1 and through an inverter V3 and amplifier V2 to produce firing control signals U1, U2 for forward and reverse converter groups, B1, B2 respectively. If the current is reduced to a value such that discontinuities occur, the amplifiers V1, V2 receive correction signals from a circuit 10 so that the control signals U1, U2 are modified to ensure stable operation. The circuit 10 includes a threshold circuit 11 which receives the unsmoothed actual current signal IA and produces an output voltage of unit value when the current is above a low level and zero when the current is interrupted. This voltage is smoothed 12, inverted 13, and summed with a unit voltage in an amplifier 14 which also divides by three. The circuit 10 thus produces a zero output when the current is continuous and an increasing correction signal when the current becomes discontinuous.
Patent GB-756392-A (GB)
Title: Improvements relating to the production of skin-stressed surfaces
IPC: B21D53/00
Filed: 1953-02-12
Abstract: 756,392. Aircraft framework. HEAL, L. C. May 12, 1954 [Feb. 12, 1953; Feb. 24, 1954], Nos. 5267/54 and 5433/54. Divided out of 756,337. Class 4. [Also in Group XXII] A method of producing a skin-stressed surface for aircraft structures, comprises deforming a stiffened metal panel from an initially-curved condition into a substantially flat condition and securing said deformed panel to a framework or other structure so that the skin tension in the panel is held captive. In an embodiment curved stiffeners A and edge stiffeners D (Fig. 16), are secured, e.g. by riveting, welding, cementing to a panel B which is transversely supported by ribs C and the curved assembly is deformed into a flat or reversely curved condition to produce skin tension in the panel before it is attached to a structural framework. Two such panels may be used for the top and bottom covering of an aircraft control flap, aileron elevator or rudder by deforming the initially curved panels to meet and be secured to a plurality of tapered ribs 3 (Fig. 2). The stiffeners 2 are of channel form and the ribs are riveted to the assembly as shown in Fig. 4. Alternatively, the panels may be initially curved longitudinally as in Fig. 5 by attachment thereto of curved edge stiffeners 2B, 2C and transverse stiffeners 2D. The edge stiffeners 2B are attached to the leading edge spar 3A and the stiffeners 2C are attached to each other to form the trailing edge of the structure. Diagonal stiffeners 2E are used to resist bending of the stiffeners 2D at opposite ends of the structure. The initially-curved panels may be reversely curved to form a hollow semi-circular body 5 the use of the reversely-curved panels prevents buckling in the regions 7, 7A adjacent the truncated ends 6, 6A respectively. In forming a wing or tail plane having curvature along its length and width the edge stiffeners a are deformed in the opposite sense to the required final shape by rolling each stiffener supported on a channel d of a jig board e (Fig. 8). The panel a is riveted at its ends to the curved stiffeners a which tend to straighten and tension the panel when released from the jig whereupon the panel is riveted to the stiffeners along its whole length, strained into a flat plane and ribs f are fitted to maintain chordwise curvature (Fig. 11A). Two such panels are placed one on each side of a profiled block C to form the final spanwise curvature of top and bottom surfaces of the wing or tail plane. In making an aircraft fuselage (Fig. 14), having a cylindrical central portion X and tapered end portions Y, Z, the panels for the end zones are initially of flat form as shown by portions y<SP>1</SP>, z<SP>1</SP> in Fig. 15, which shows a panel b<SP>1</SP> connected to curved edge stiffeners a<SP>1</SP>. Tension is introduced into portions y<SP>1</SP>, z<SP>1</SP> when the stiffeners are straightened and deformed into a reverse curve condition prior to being connected to other similarly formed panels to make up the skin-stressed fuselage. Specifications 702,981 is referred to.
Patent GB-1287038-A (GB)
Title: Multi-colour photographic silver halide positive materials
IPC: G03C7/00
Filed: 1970-02-04
Abstract: 1287038 Multi-colour photographic silver halide positive materials FUJI PHOTO FILM CO Ltd 4 Feb 1970 [9 Oct 1969] 5299/70 Heading G2C [Also in Division C2] Multi-layer multi-colour photographic lightsensitive positive silver halide material comprises a support and silver halide light-sensitive emulsion layers containing couplers forming cyan, magenta and yellow dyes, wherein there is present in a light-sensitive silver halide emulsion layer at least one of a secondary coupler capable of forming a red dye having its absorption maximum at 460 nm to 520 nm and a secondary coupler capable of forming a blue dye having its absorption maximum at 570 nm to 640 nm, the characteristics of the layers and of the secondary coupler or couplers being so chosen that the red and/or blue dyes are formed at image portions having an equivalent neutral density higher than 1À2 in a transparent colour photographical material or an equivalent neutral reflection density higher than 0À8 in a colour photographic reflective material. The or each secondary coupler may be present in a different light-sensitive silver halide emulsion layer containing a primary coupler. The relative coupling rate of the secondary coupler may be 0À1-0À6 of the primary coupler in the same layer. The red coupler may be in the blue- or greensensitive silver halide emulsion layer. The blue coupler may be in the green- or red-sensitive silver halide emulsion layer. Alternatively the or each secondary coupler may be in a light-sensitive silver halide emulsion layer different from those containing the primary couplers. The material may contain only one secondary coupler, the coupler being in a light-sensitive silver halide emulsion layer having a sensitivity less than half of that of the layer containing one of the primary couplers having the same spectral sensitivity as the layer containing the secondary coupler. Many examples of the couplers are given. The image produced has a black part of high visual density without reducing the colour saturation.
Patent GB-114492-A (GB)
Title: Improvements in Brushes or Mops for Cleaning Windows and for other purposes.
Inventor: SKINNER CHARLES
IPC: A47L13/23
Filed: 1917-04-17
Abstract: 114,492. Skinner, C. April 17, 1917. Self-feeding brushes and mops.-In brushes and mops of the kind having a detachable pipe A and sprays B for conveying water to the cleaning surface, the rubber or other flexible tubing G connected to the water supply is clipped or otherwise detachably connected to the handle E.
Patent GB-396469-A (GB)
Title: Improvements in or relating to washing and/or renovating devices or appliances
IPC: A47L13/144
Filed: 1932-02-24
Abstract: 396,469. Cleaning vehicles, floors, &c. COOPER, M. K. and COOPER & CO., Ltd., M. K., 11, Red Cross Street, Liverpool. Feb. 24, 1932, No. 5479. [Class 19.] An appliance for cleaning vehicles, floors, &c. comprises a pad 1, Figs. 1, 2, and 4, of sponge rubber or other absorbent material, with ends 1a overlapping part of a stiffening plate 12 to which it is secured by means of a fabric or like flexible material 14 adhesively or otherwise attached around the ends 1a. The material 14 is clamped by screws 11 between the plate 12 and a backing plate 10 to which a hollow handle 2 is attached. The handle is connected to a source of water supply, the water flowing through apertures in the plates 10, 12 and through a perforated portion of the fabric sheet 14. The pad 1 may be squeezed to expel moisture by means of a roller 20 carried by a U-shaped frame 21 which is pivotally mounted on a pair of lugs 25 provided on the backing plate 10. The frame is turned by hand so that the roller 20 sweeps over the operative surface of the pad 1, cam slots 27 on the lugs 25 being engaged by pins 26 on the frame 21 to control the pressure of the roller against the pad 1. In a modification, the frame is provided with cam-faced members for engagement by pins on the lugs 25. A squeegee 29 may be provided at the front of the appliance. In the construction shown in Figs. 7 and 8, a roller 32 is carried by a frame 33 which is connected by springs 34 to a frame 35 provided with a roller 36 guided in a slot in the backing 10. By manipulating the handle of the frame 33, the roller 32 may be drawn across the pad under pressure effected by the springs 34.
Patent GB-659787-A (GB)
Title: Improvements in or relating to oxidation of hydrocarbons
IPC: C07C51/31
Filed: 1949-03-01
Abstract: Phthalic anhydride is obtained by the vapour phase oxidation, in the presence of a solid oxidation catalyst such as vanadium oxide, of a hydrocarbon fraction boiling between 165 DEG  and 185 DEG  C. and containing substantial amounts of indene and/or hydrindene. The said fraction may be obtained by the steam cracking of gas oil, kerosene, or naphtha feed stocks, generally at 600-800 DEG  C. Certain coal tar fractions containing substantial amounts of indene and/or hydrindene can also be used as the feed stock.  The catalyst may be employed in a fixed bed or the process may be of the moving bed or fluid-flow type, e.g. the technique, described in Specifications 583,032, [Group III], 633,128, [Group XII], and 634,102, [Group III], may be used. The transfer-line reactor technique described in Specification 634,102, [Group III], is particularly suitable.  Specified oxidation catalysts are vanadium oxide or mixtures of vanadium oxide and other oxides, e.g. molybdenum oxide.  Potassium compounds such as the sulphate may be added as promoters.  The catalyst may be supported on an inert support and in the transfer-line reactor, the catalyst preferably is in the form of microspheres.  The oxidation may be carried out either with or without an oxidizing gas.  The latter may be pure oxygen, air, or a mixture of oxygen with an inert gas such as nitrogen.  When no oxidizing gas is used catalysts such as the higher oxides of vanadium may be employed as oxygen carriers which can be enriched with reactive oxygen in a separate zone. When oxidizing gas is used it should be present in substantial excess over the hydrocarbons.  The oxidation temperature may be 400-700 DEG  C and especially 430 DEG  to 480 DEG  C.  In examples phthalic anhydride is obtained by (1) contacting a mixture of air and a petroleum fraction boiling at 165-185 DEG  C. containing indene and hydrindene with a vanadium oxide catalyst on a corundum support; (2) by contacting a mixture of hydrindene vapour and air with vanadium oxide on corundum promoted by potassium sulphate; (3) by contacting a mixture of indene vapour and air with the same catalyst as in (2).
Patent GB-525231-A (GB)
Title: Improvements in and relating to propelling pencils
IPC: B43K25/02
Filed: 1939-02-20
Abstract: 525,231. Pencils. BRENNER, L. F. Feb: 20, 1939, No. 5567. [Class 146 (iii)] [Also in Group XXV] In a propelling pencil having a lead-propelling rod d axially displaceable in a screw-threaded tube c which is secured in the barrel a by a fluted tube b providing housings for spare leads, and a clip g with member h placed over tube c and clamped against the upper end of the barrel by the nut e which closes the spare lead magazine, the part h has a projection j engaging in the flutings of tube b to prevent rotation of the clip on the barrel. The head f by which rod d is operated may have a skirt enclosing the nut e which is then of reduced diameter so that the external diameter of the skirt conforms with that of the barrel. In a modification the member e engages tube c fricionally, and projection j is replaced by a projection on the lower face member e which passes through an aperture in part h into engagement with the flutings.
Patent GB-452437-A (GB)
Title: Improvements in and relating to apparatus for the heating and drying of garments and fabrics
IPC: D06F81/08
Filed: 1935-02-21
Abstract: 452,437. Drying; ironing; valves &c. CROFT, C. M., 47, Lytton Grove, Putney, and REA, D. B., 8, Edge Hill, Wimbledon, both in London, and WALL, H. A., 281, Commonside East, Mitcham, Surrey. Feb. 21, 1935, Nos. 5605 and 35411. [Classes 34 (i) and 34 (ii)] [See also Groups VIII and XXIX] A. self-contained portable apparatus for domestic drying and /or ironing of household fabrics and wearing-apparel comprises an elongated hollow former a, Fig. 1, immediately above a steam boiler c to which it is connected by a steam pipe b. The former has means for releasing air from its interior as by a pipe g. Fig. 4, and cock h<1>. Articles such as stockings, pyjama trousers, and similar garments can be slipped on the smooth exterior surface of the former and dried or ironed. The release of air can be made automatic as by a thermostatic device. The boiler case c is provided with flaps s<1> which can be let down to stand upon. The former a is slightly inclined so that condensed moisture will flow back into the pipe b. A drain cock d may be filled. In a modification, Fig. 2, a narrow portion a<1> is added to the former a. Spring-pressed pivoted arms e-are provided to hold a portion of the garment under treatment. A release valve for cold air, Fig. 9, may be provided in the former a consisting of a cage i enclosing a metal rod j registering with an outlet k. When the rod j expands, due to steam heat the outlet r is closed. The former a may be covered with flannel. The steam pipe b may have auxiliary formers m, m<1>, Fig. 8 of any desired shape. The pipe b may also be made telescopic. The steam boiler, Fig. 6, has a filling inlet o and adjustable inlet p to limit the level of the water supplied. Where gas heats the boiler a thermostatic device consisting of a metal diaphragm c<1> pressure - operated controls a gas inlet pipe c<3>. The former may be used as an ironing table and a steam-heated hand iron may be connected by a tube to the pipe b. The device may be made small to mount on a kitchen table.
Patent GB-306462-A (GB)
Title: Improvement in method of and apparatus for the dyeing or other liquid treatment of silks and other fabrics
IPC: D06B3/26
Filed: 1929-02-20
Abstract: 306,462. Cole, C. P. Feb. 20, 1928, [Convention date]. Dolly machines; circulating fluids.-In dyeing &c. textile material formed with pleats in the liquid, the liquid is caused to support the lower portion of the descending column of pleats, the material being at the same time drawn from the pleats. The endless ropes fall in pleats on to the guide 14 which is set at 45 and is spaced from the floor 15 of the vat so that a recess 16 is formed. The pleats come under the flotative action of the liquid the circulation of which may be induced either by the steam jets 6 or by the advance of the fabric through the liquid.
Patent GB-357923-A (GB)
Title: Improvements in and relating to direction indicators for use on bicycles and motor cycles
IPC: B62J6/00
Filed: 1931-02-24
Abstract: 357,923. Road -traffic signals on vehicles. KALB, J., (trading as KALB & CO., J.), 14, Kirchenweg, Nuremberg, Germany. Feb. 24, 1931, No. 5769. Convention date, April 1, 1930. [Class 118 (ii).] A pivoted direction-signalling arm 6 carrying a lamp 14 contains also a pocket electric battery 9, which, as the arm moves about a pin 3, is moved axially by a cam 2 acting on a pin 5 so that the battery terminal 9<11> makes contact with the lamp contact 13 and the lamp is lighted.
Patent GB-1209349-A (GB)
Title: Improvements in rasps
Inventor: MANLY ROBERT WILLIAM ATKINSON
IPC: B23D71/00
Filed: 1968-02-06
Abstract: 1,209,349. Rasps; abrasive tools. R. W. A. MANLY. 15 April, 1969 [6 Feb., 1968], No. 5813/68. Headings B3D and B3L. A rasp or sandpapering tool particularly adapted for removing material from the bottom edges of doors comprises a channel-shaped body presenting a rasping (or sandpapering) surface 4 on one side of its web 6, and limbs 8 extending upwardly and outwardly from this same side to form hand-held grips for the tool. The web 6 may carry a perforated rasping strip of the type disclosed in Specification 695,859 which may be spot-welded or adhesively secured thereto, or alternatively the web itself may be drilled to form the rasping surface. The side limbs 8 may be integral with the web 6 or detachably secured thereto by screws in which case the edges of a strip of sandpaper carried by the web may be clamped between the web and side limbs.
Patent GB-660691-A (GB)
Title: Improvements relating to bobbin carriers for spinning machines
IPC: B65H49/26
Filed: 1949-03-03
Abstract: 660,691. Bobbin drag arrangements. MACKIE & SONS, Ltd., J., and MACKIE, J. P. March 3, 1950 [March 3, 1949; Dec. 17, 1949], Nos. 5903/49 and 32420/49. Class 120(ii). A device for maintaining substantially uniform drag upon bobbin carriers in textile spinning machinery wherein the bobbin carriers have discs at their bases which either carry friction pads or rotate on friction pads or rest on a floating disc carrying friction pads, has a trough or troughs provided on the bobbin rail to hold lubricating oil, each trough having inwardly directed surfaces at or about the level of the discs to prevent the throwing out of oil and means for insuring the effective circulation of oil in each trough due to the rotation of the bobbin carriers therein and so maintaining effective lubrication of the friction pads. As shown, the bobbin rail a has inturned lips b forming a trough for holding lubricant. The bobbin carrier consisting of the disc c and cylindrical extension d rotates around the fixed spindle e. Oil is drawn up by the rotation: of the carrier from the well g passes between the carrier and the spindle e and is thrown outwards through holes k to lubricate the tops of the pads h. Other constructions are shown in which the trough is made separate from and attached to the bobbin rail and also in which the friction pads are secured on the underside of the bobbin carrier disc and in which the friction pads are secured to the top and bottom of a separate disc freely mounted to rotate about the hub of the disc of the bobbin carrier. Arrangements may also be provided for the circulation of oil around the fixed spindle e by forming a helical groove or grooves in the surface of the spindle. A further construction shows several bobbin carriers which operate side by side in a common oil trough, the oil being circulated by scoops around the hubs of the bobbin carriers.
Patent GB-774155-A (GB)
Title: A device for assessing the activity of chemical compounds in relation to micro-organisms
IPC: C12M1/20
Filed: 1955-02-28
Abstract: A device for assessing the activity of chemical compounds in relation to microorganisms comprises an essentially flat flexible sheet of absorbent material having a plurality of peninsular areas individually carrying preparations of different chemical compounds having activity in relation to micro-organisms. Suitable absorbent material is filter or blotting paper, cloth and cardboard.  As shown, the device consists of a paper disc having six projecting arms arranged symmetrically around the perimeter.  The shape of the disc and the number, length, shape and distribution of the arms around the disc may be varied provided at least two arms are present.  Instead of impregnating each arm with a different antibiotic, a mixture of two antibiotics may be used and therefore the synergistic, additive, indifferent or antagonistic activity of the two antibiotics against the test p  micro-organism can be ascertained.  The device may also be used to test the nutritional requirements of micro-organisms by impregnating a peninsular area with a sugar, an amino acid, a vitamin or any other substance used for the nutrition of micro-organisms. Each arm of the device is impregnated with e.g. a different antibiotic and the impregnated device is then dried in vacuo over a drying agent and is stored in a closed container. In testing, a petri dish containing a gel like culture medium is inoculated with the test micro-organism, the above device is applied to the surface of the medium, the whole incubated at e.g. 37 DEG C. and the activity of the chemical compounds carried by the peninsular areas of the device measured by the growth or otherwise of the micro-organism in the neighbourhood of each of the peninsular areas.  In testing for the nutritional requirements of micro-organisms, the culture medium which is inoculated with the test micro-organism contains all the essential ingredients for growth of that particular micro-organism except the class of substances under test.  If the substance under test is utilizable, the micro-organism will grow in the immediate vicinity of the impregnated arm.
Patent GB-192623-A (GB)
Title: Improvements in swifts or hank carriers
IPC: B65H49/30
Filed: 1922-02-28
Abstract: 192,623. Watson, W., and Hoyle, E. Feb. 28, 1922. Skein holders and swifts.-A swift or hankcarrier for use in winding into or from hanks or skeins comprises an axle and end plates b and wire supports d one or more of which are pivoted by means of extensions f in holes c in the end plates. The supports are held in their operative positions by slots g in the discs and are removed therefrom by pinching or expanding them according as the extensions f turn outwardly, as shown, or inwardly. The holes c may be radially or otherwise arranged. By turning one of the supports as shown in Fig. 3 a hank may be placed on or removed from the carrier, and by adjusting one or more of the supports in different holes the holder may be adapted to hanks of different sizes.
Patent GB-983254-A (GB)
Title: Transductor controlled impedance relay with elliptical characteristic
IPC: H02H3/40
Filed: 1962-02-16
Abstract: 983,254. Protective arrangements. ALLMANNA SVENSKA ELEKTRISKA A.B. Feb. 16, 1962 [Feb. 18, 1961], No. 5996/62. Heading H2K. An impedance relay arrangement, e.g. for use as a starting relay in distance protective system, comprises a transductor having an A.C. winding 4 energized in accordance with the current in the protected circuit and two D.C. windings 3, 5, both of which are energized via rectifiers 1, 11 by a component proportional to the voltage of the protected circuit and at least one of which is energized in addition by a component dependent on the current in the protected circuit. One of the D.C. windings is provided with a shunt impedance, e.g. a capacitor 13, to eliminate mutual inductance between the D.C. windings and the arrangement provides an elliptical impedance characteristic. The current component is introduced into the winding 5 by a transformer 8 and a resistor 10 in series with the rectifier 11. A similar arrangement may be provided for the winding 3, Fig. 2 (not shown). The relay 15 has its operating winding 14 connected to the A.C. winding 4 or, as shown, to a further A.C. winding 6. Specification 589,933 is referred to.