baber/WOPTO huggingface dataset:
Patent GB-671399-A (GB)
Title: An instrument for measuring a fine dimension
IPC: G01B7/34
Filed: 1949-05-31
Abstract: 671,399. Measuring bridges; electrical instruments. CORNELIUS, J. R. March 14 1950 [May 31, 1949], No. 14539/49. Class 37. [Also in Group XXXVIII] In an electrical instrument for measuring fine dimensions, Fig. 1, a high stability oscillator pentode 19 controlled by a quartz crystal 20 and whose cathode is returned to a tap on a resistance-capacitance potentiometer between the control grid and earth, is coupled through a variable capacitance 28, to a tank circuit 29-32 tuned to an odd harmonic, which energizes through an amplifier 33 a filter circuit comprising a primary 34 tuned by a variable capacitance 36 coupled to a secondary 35 tuned by a capacitance 37, in parallel with a capacitance 38 variable by a work, stylus in accordance with the dimension to be measured. Compensating capacitors 45, 46; 47 are provided, and selectively switchable ancillary condensers 39-13 enable the measurement sensitivity to be varied. Variations of the stylus condenser alter the filter tuning to cause by discriminator action similar variations of the amplitude of the signal output of the filter, which are applied to one grid of a double triode 52, connected With potentiometers 53, 54 as a bridge valve voltmeter, whose measuring instrument 60 indicates the unknown dimension. Temperature errors in the filter circuit tuning are eliminated by making the primary inductance of the filter greater than the secondary inductance, and the secondary capacitance greater than the primary capacitance, and giving. the inductances and capacitances respectively positive and negative temperature co-efficients. In a modification, Fig. 2 (not shown), the filter output voltage is rectified, before measurement, in a double diode, which also biases the second section of the valve voltmeter double triode. Specification 577,538, [Group XXXVIII], is referred to.
Patent GB-850207-A (GB)
Title: Improvements in flexible roller shutters
Inventor: CHURCHILL STUART NETTING
IPC: E05D15/24
Filed: 1959-04-29
Abstract: 850,207. Roller shutters; sliding doors. NORMAND Ltd. April 29, 1959, No. 14614/59. Addition to 665,641. Class 20(3) The roller shutter of parent Specification is modified by substituting extruded light alloy slats for the sheet metal slats. Each of the extruded slats, Fig. 4, has formed along one edge, a flange b parallel with but offset from the plane of the slat and along its opposite edge, an extension c in the plane of the slat, items band c being of greater thickness than the main portion 1 of the slat, and the flange b is adapted to lie behind the extension c of the adjacent slat, e.g. as shown in Fig. 2. Each slat is also formed at its opposite sides with U- shaped sections, the offset arms d of adjacent slats having secured thereto the hinges 2.
Patent GB-707160-A (GB)
Title: Improvements in or relating to method for manufacturing stencils
IPC: B41N1/24
Filed: 1951-06-20
Abstract: 707,160. Copying by means of radiant heat. DICK, CO., A. B. June 20, 1951 [July 28, 1950], No. 14620/51. Drawings to Specification. Class 98(2) [Also in Groups VIII and XVI] A method of producing a stencil from an original comprises placing the original in close face-to-face relation with a stencil blank comprising a base tissue having a heat-sensitive film of plastic material on one side which renders the blank ink-impervious, and directing radiations rich in infra-red upon the original, whereby heat is developed in the dark areas thereof, causing rupture of corresponding areas of the plastic film to provide openings through which ink can pass. The original may be arranged with its printed face against either face of the blank, the rays being directed against the blank, or with its non-printed face against the film, the rays being directed against the original. The film is most suitably 0.1-3.0 mm. thick and may be applied by adhesive or by calendering, previously being stretched. The radiant energy may be delivered from a photoflash bulb, carbon arc-lamp, infra-red-ray lamp, or. tungsten filament, with the aid of lenses or reflectors, and the exposure should be as short as possible to avoid blurring due to lateral conduction of heat. A long, thin source such as a hot wire may be used, the radiation traversing the blank at a constant speed, or a point source may be used, the blank and orginal being mounted on a rapidly rotating cylinder, and the source moving axially thereof, until each point has been exposed. The base tissue may be Yoshino paper, wood fibres, wool, silk, cotton, hemp, nylon, cellulose acetate, regenerated cellulose, polyvinylidene chloride, glass fibres, mineral wool or asbestos, with or without a small amount of binder. The plastic film may be polyvinyl, polyethylene, or polystyrene resins, nylon, cellulose esters and ethers, with plasticizers added if desired to lower the softening temperature of the plastic, substantially as described in Specification 696,563.
Patent GB-192012-A (GB)
Title: Improvements in and relating to the frames of mowing machines of the kind drawn by horses
IPC: A01D67/00
Filed: 1922-05-24
Abstract: 192,012. Sch÷nmetzler, X. May 24, 1922. Mowing- machines.-A mowing - machine, shown in plan, is provided with a longitudinal beam f close to the cutter side of the machine, this beam being secured to the main frame and connected to the ordinary longitudinal beam a by a transverse bar h. A swivelling wheel b mounted in a fork c is pivoted in the bar h by a vertical stud d. The wheel b runs in the same track as the main wheel g on the cutter side of the frame.
Patent GB-752704-A (GB)
Title: Improvements relating to screening devices
IPC: B07B1/49
Filed: 1954-05-19
Abstract: 752,704. Sifters. BRUCKENBAU FLENDER GES. May 19, 1954 [May 20, 1953], No. 14712/54. Class 117. A screen comprises a perforated yieldable material, such as rubber or elastic-plasticfabric, divided into a number of separately tensioned zones by transverse bearers. As shown the transverse bearers 38, which are rubber covered and formed like a slotted tube, are held in trough-shaped side-plates 55 screwed to a hardwood fillet 1 and covered by a bar 56. The screen may be held in the bearer 1 by downwardly drawn flaps formed when stamping out holes 52, or (ii) by passing loopshaped clamping ports over securing wires 37 Fig. 2, (not shown); (iii) the flaps may be stuck or vulcanised to the rubber covered bearer, Fig. 4 (not shown) ; (iv) the flaps may be pressed into a slot at the bottom of the bearer Fig. 5, (not shown). In alternative forms, (i) the screen may be divided into parallel strips co-operating to form openings 52, Fig. 6 (not shown) ; (ii) the strips may be stiffened by steel inserts ; (iii) the apertured screen may be cast from elastic material with apertures which have a conicity through the screen Fig. 7, (not shown).
Patent GB-823068-A (GB)
Title: Condensation products from glucosides
IPC: C07H17/04
Filed: 1956-05-11
Abstract: The invention comprises compounds of the formula <FORM:0823068/IV (a)/1> (R1 represents H or an alkyl group containing from 1-6 carbon atoms, and R2 denotes alkyl, aryl, or a heterocyclic residue), and their preparation by condensing the corresponding glucoside with an aldehyde R2CHO, preferably in the presence of a water-binding agent, particularly zinc chloride, anhydrous copper sulphate, or small quantities of concentrated sulphuric or hydrochloric acid, or p-toluene sulphonic acid.  An inert solvent, e.g. dioxane or dimethylformamide may be used and the water produced in the reaction removed by azeotropic distillation with an immiscible solvent.  In examples: (1) podophyllotoxin glucoside is shaken with benzaldehyde and fused zinc chloride, excess aldehyde distilled off the residue treated with aqueous chloroform, the organic layer separated, dried and distilled, yielding podophyllotoxin-benzylidine glucoside, purified by crystallization from ethanol; similarly (2) to (4) and (6) to (13), are prepared the p-methoxy - benzylidene-, p - methylbenzylidene-, thenylidene-, ethylidene- and salicylidene-derivatives of podophyllotoxin glucoside; the benzylidene-derivatives of a - and b -peltatin glucosides and of 41-demethyl-41-ethylpodophyllotoxin glucoside; and the benzylidene, anisylidene- and thenylidene derivatives of 41 - demethyl - podophyllotoxin glucoside; (5) podophyllotoxin glucoside is refluxed in anhydrous furfural containing a little nitric acid under reduced pressure and excess furfural removed, yielding furfurylidene glucoside, purified by crystallization from ethanol.  Specifications 768,919, 777,662 and 777,900 are referred to.
Patent GB-103470-A (GB)
IPC: F02B33/08
Filed: 1916-10-18
Abstract: 103,470. Binche, G., Dupuis, C., and Prignol, H. Jan. 17, 1916. [Convention date]. Drawings to Specification. Valves; valve-gear. - In a two-stroke-cycle engine having one piston working in another and a pump space beyond the outer piston, a suctionactuated disk valve is located in the end of the pump space. According to one construction, a lift valve in the outer piston is opened by an adjustable pin secured in the head of the cylinder.
Patent GB-257893-A (GB)
Title: Improvements in or relating to the atomisation and desiccation of liquids or solutions
IPC: A23C1/04
Filed: 1926-06-15
Abstract: 257,893. Nestl• & Anglo-Swiss Condensed Milk Co., (Assignees of Stousland, G. J.). Sept. 5, 1925, [Convention date]. Spray evaporators.-The atomization of milk or other liquid to be dried is effected outside the main evaporating and collecting chamber. Air under a pressure of about 3 atmospheres and at a temperature up to about 500‹ C. is passed through a jet 1 and atomizes a stream of milk &c. supplied through a pipe 2. The spray is carried through an opening 6 into the evaporating and collecting chamber 3.
Patent GB-1020439-A (GB)
Title: Improvements in and relating to circular knitting hosiery machines
IPC: D04B9/54
Filed: 1964-04-14
Abstract: 1,020,439. Knitting-machines. SOLIS S. r. L. April 14, 1964 [April 17,19631, No. 15298/64. Heading D1C. The welt dial 5 of a circular machine is radially slotted to receive in each slot a welt instrument 3 comprising a single blade provided with a hook at its outer end. The instruments are aligned with the alternate needles which initially are rendered inoperative as the needles align between the welt instruments of each pair such that the yarn extends from every fourth needle which knits it over the two welt instruments in completely uninterrupted form. The instruments are thereafter withdrawn and all the needles knit the welt until on completion the instruments are reintroduced and the yarn extending over each pair of welt instruments is then taken by the needle positioned between the instruments of each pair.
Patent GB-235593-A (GB)
Title: Improvements in or relating to barrels and casks
IPC: B27H5/00
Filed: 1925-06-13
Abstract: 235,593. Bolinder, E. A. June 14, 1924, [Convention date]. Joints, carpenters', &c.-Barrels with dove-tailed staves, in which the line of the joint forms an arc of a circle, are made with the dovetail joint so positioned in the edge of the stave that at the middle the part 3 is thicker than the part 4, and at the ends the part 5 is thicker than the part 6 so as to give increased strength. The width of the dove-tail groove increases uniformly from one end of the barrel &c. to the other, the dove-tail being shaped to correspond so that it may be slid into the groove without resistance for the greater part of the movement. The edge of the groove which is nearer the inside of the barrel &c. is arranged' so that the distance 5 equals the distance 5<1>, the tapered formation of the groove thus causing the distance 6 to be less than the distance 6<1>.
Patent GB-715622-A (GB)
Title: Improvements in or relating to apparatus for forming ducts in concrete
Inventor: KINGSBURY ROBERT FREDERICK THO
IPC: E04C5/10
Filed: 1951-06-28
Abstract: 715.622. Forming ducts in concrete. STRESSED CONCRETE DESIGN, Ltd. July 28, 1952 [June 28, 1951]. No. 15410/51. Class 20 (2) Ducts in roadways are formed by a rubber core 6 held at one end 10 and positioned in advance of the concrete being cast by a tubular guide 4 carried by a bogey 2 running on rails 1a. The bogey carries a number of guides for cores forming ducts for prestressed reinforcement. Pockets are formed in the road to allow the cores to be removed. The core 6 may be moved forward by connection to the guide after the end 10 has been freed.
Patent GB-168431-A (GB)
Title: Waterproof valve ventilator for footwear
IPC: A43B7/06
Filed: 1920-06-08
Abstract: 168,431. Jones, R. T. June 8, 1920. Ventilating.-A ventilator for the waist of boots &c. comprises a perforated flanged casing, Fig. 1<B>, fitted with a perforated sliding plate, Fig. 2<A>, faced with rubber. The plate is operated by a pin f which projects through a slot c.
Patent GB-627797-A (GB)
Title: Improvements in and relating to surgical dressings
IPC: A61L15/46
Filed: 1947-06-11
Abstract: An antibacterial dressing which is dry to the touch comprises a fibrous carrier having deposited on it gramicidin or tyrothricin in a non-volatile solvent.  A preferred concentration is 7 micrograms of tyrothricin in 1.85 milligrams of propylene glycol per square centimetre of the carrier, which may be cotton fabric and may be backed by a resilient pad and a pressure sensitive adhesive strip. Among other suitable solvents are glycerol, sorbitol, ethylene glycol and monoethanolamine.  Specification 468,529, [Group IX], is referred to.
Patent GB-695796-A (GB)
Title: An automatic electric switch
IPC: H01H71/16
Filed: 1950-06-21
Abstract: 695,796. Automatic circuit-breakers. POWER EQUIPMENT CO., Ltd., and HEATH, B. H. June 19, 1951 [June 21, 1950], No. 15482/50. Class 38 (v) In a switch released on overload by a bimetal strip operating a latch, and having a cam for adjusting the overload rating, the bimetal strip and cam are both incorporated in the movable contact-carrying part of the switch. The switch comprises pairs of fixed contacts 12 bridged by contacts 21 mounted on a carrier 20 slidable on pins 22, 22<SP>1</SP> and controlled by springs 23, 23<SP>1</SP>. The contacts 21 are secured by screws 19 and those of each pair are connected by a heating winding 15<SP>1</SP> surrounding a bimetal strip 15 secured by one of the screws 19 to the carrier 20. Alternatively, the strips 15 may be directly heated by the current. The carrier 20 is latched in the closed position by a locking bar 25 on a wire frame 26 pivoted at 27, 27<SP>1</SP>, the bar 25 engaging a groove 28<SP>1</SP> in a cam 28 rotatably mounted on the carrier 20, the locking position of the bar 25 being shown by dotted lines in Fig. 3. A flange 28<SP>2</SP> of the cam groove 28<SP>1</SP> has its periphery eccentric to the cam axis whereby rotation of a cam knob 30 varies the distance through which the bar 25 must be lifted by the strips 15 to effect release of the switch under the action of the springs 23, 23<SP>1</SP>. The switch is reset by s button 31<SP>1</SP>, and may be manually tripped by a button 31. The fixed contacts 12 comprise an L-shaped part screwed to a block 13 and a detachable blade 16 having a slot slidable over an upstanding tongue 17 of the L-shaped part, and a hair-pin shape spring 18 which acts on the blade 16. On engagement of a contact 21 with a blade 16, the latter pivots on its rear end in a slot in the heel of the L-shape contact part against the action of a spring 18.
Patent GB-544451-A (GB)
Title: Improvements in or relating to ladders
IPC: E06C1/12
Filed: 1940-10-21
Abstract: 544,451. Ladders. PENN, R. S. Oct. 21, 1940, No. 15502. [Class 20 (ii)] A ladder has each style stiffened by a wire 10 disposed in a recess 11 at the rear of the style and attached at its upper end to a tension screw 13 so that the tension of the wire can be adjusted by a nut 15 bearing on a plate 14. When used in an extension ladder the rungs 3 are attached to the fronts of the styles and upper and lower rungs in the lower ladder are connected together by strips 7 having bevelled tops 8 which merge into the inclined edge 9 of the upper step, so that the rungs do not clash as the upper ladder portion slides within the lower ladder portion which encloses the upper ladder portion.
Patent GB-386524-A (GB)
Title: Improvements in and relating to driving motors for centrifuges
IPC: D01D7/02
Filed: 1932-06-01
Abstract: 386,524. Electric motors. INTERNATIONAL GENERAL ELECTRIC CO., Inc., 120, Broadway, New York, U.S.A.- (Assignees of Allgemeine Elektricitats-Ges. ; 2, Friedrich Karl-Ufer, Berlin.) June 1, 1932, No. 15555. Convention date, June 1, 1931. [Class 35.] A centrifuge or spinning box b is driven by a motor a and is enclosed in a casing c. A frame d just under the centrifuge, a gutter g and pipe h are arranged to carry away any overflowing liquid. The casing c and frame d are supported on the body e which is rigidly carried by a base plate f. Rings k, m, of yielding material such as rubber rest in grooves in the body e, and they support the conical body of the motor a. The entry of air is thus confined to the inlet i and the rings permit the motor to oscillate.
Patent GB-1274387-A (GB)
Title: Separation of floatable media
Inventor: FREEGARDE MICHAEL
IPC: B04B1/00
Filed: 1970-04-02
Abstract: 1,274,387. Centrifugal separators; removing floating oil from water. M. FREEGARDE. 19 April, 1971 [2 April, 1970], No. 15556/70. Headings B1D and B2P. A water-borne liquid is separated from a body of water on which it floats by supporting a chamber 1 having an aperture 4 in its wall in the body of water and moving the chamber relative to the body of water whereby a surface layer of the water is caused to enter the chamber through the aperture 4 tangentially to its wall thereby inducing a rotational motion to the water contained in the chamber so that its surface assumes an inclination towards the centre of the chamber towards which the water-borne liquid 7 drains and from whence it is collected. The chamber 1, Fig. 1 may be supported between two hulls of a catamaran and may be used to collect oil slicks from the surface of the sea. Alternatively, two chambers may be supported each between adjacent two of three hulls of a trimaran. The chamber 1, which is open at top and bottom, extends a short distance below the surface of the water. A scoop 3 directs the surface water passing between the hulls of the vessel through the aperture 4 into the chamber. The rotational motion of the water in the chamber may be increased by means of a stirrer 5 driven by a motor 6. The oil in the chamber 1 is trapped between two concentric tubes 8 and 9. The oil accumulates within the tube 9 and as it rises to the level of one or more apertures 10 in the wall of the tube 9, it spills over into an outer annular trough 11 from whence it may be pumped away through a pipe 12. The outer or trimaran may be self-propelled or may be tube 8 may be dispensed with. The catamaran towed by a ship.
Patent GB-405639-A (GB)
Title: Improvements in and relating to joints and couplings for pipes and the like
IPC: F16L27/04
Filed: 1932-06-01
Abstract: 405,639. Pipe &c. joints. LAMONT, B. N. R., 56, Maple Road, Surbiton, Surrey. June 1, 1932, No. 15578. [Class 99 (i).] A pipe P is jointed at any angle and in a fluidtight manner to a spigot 2 on a coupling member 1 by a jointing sleeve S which is disposed between a pair of collars 5, 6, loosely mounted on the pipe end, and is adapted to be deformed to grip the pipe at its ends upon forcing the collars together by a coupling nut 4 which screws on to the spigot 2. The collars have convexed exterior surfaces, each constituting a zone of a sphere, which engage bevelled seatings on the spigot 2 and nut 4, and they are also formed with internal steps 11 against which the jointing sleeve contacts when it is deformed. The jointing sleeve shown may be replaced by a solid sealing ring of trapezoidal or conical crosssection ; alternatively, Fig. 5, the pipe end 19 may be flared and gripped between the jointing ring S4 and collar 6. The invention is also applicable to rods. Specification 357,741 is referred to.
Patent GB-457394-A (GB)
Title: Improvements relating to vacuum cleaners
IPC: A47L9/02
Filed: 1935-05-29
Abstract: 457,394. Suction nozzles for vacuum cleaners. JONES, E., 10, Clowes Street, Withington, Manchester. May 29, 1935, No. 15611. [Class 8 (i)] A vacuum cleaner is provided with means causing automatically a variation in the width of the nozzle orifice as the nozzle is moved backwards and forwards over the material or surface being cleaned so as to provided for a concentration of the suction upon a smaller area in one direction of movement of the nozzle than in the other. The front wall a of the nozzle is hinged to the body at c, a torsion spring d maintaining it in its normal position ; a central portion of the flap a has a V-edge e, the ends of the flap edge being substantially rectangular. When the nozzle is moved to the left, the flap a moves towards the fixed side f and the rectangular portion of the edge comes in contact with said fixed side, a gap being left between the V-edge e and said side f. The air entry is thus decreased in length and in width. The outer edge g of the rectangular edge portion in this position raises the V- edge e above and clear of the surface, whereby air is drawn over the surface at high velocity and entrains and removes fluff, hair or like particles adhering to such surface. Snugs h, h<1> act as stops for the pivotal movement of the flap a and also serve to minimize air leakage around the hinge pin ; the interior of the fixed part has a ridge i which is contacted by the sloping edges of the flap a. The flap may be arranged at the opposite side of the nozzle so that it closes towards the fixed side when the nozzle is drawn towards the user. The Provisional Specification describes a modification in which the nozzle comprises two cylindrical coaxial parts capable of turning one within the other. The inner part provides one wall of the nozzle orifice and is secured to the handle ; the outer part which provides the other wall of said orifice has rubber or other rings thereon engaging the surface over which the nozzle is passed. Thus the outer part turns upon the inner as the nozzle is traversed, reducing or increasing the width of the nozzle orifice according to the direction of movement. The surfaces of the friction rings may be eccentric to the nozzle axis, so that when the nozzle is reduced in width it is also raised slightly from the surface being cleaned.
Patent GB-170326-A (GB)
Title: Improvements relating to feed water heaters for locomotive and like boilers
IPC: F22D1/42
Filed: 1920-06-09
Abstract: 170,326. Trevithick, F. H. June 9, 1920. Check valves.-A boiler check valve may be maintained in a raised position bv means of a screwed spindle t in order to blow through the heater when emptying.