baber/WOPTO huggingface dataset:
Patent GB-629253-A (GB)
Title: Improvements in or relating to electric heaters
IPC: F24H3/00
Filed: 1946-04-29
Abstract: 629,253. Electric air heaters. DRYDEN, & SONS, Ltd., T., and BARRS, J. W. April 29,1946, No. 12796. [Class 39(iii)] In an electric heater, an electric heating element proper 17 is enclosed within a tubular member formed by interfitting finned elements 19 each of which has a tubular portion stepped in longitudinal section between its ends before assembly of the elements so as to provide a socket part 23 and a spigot part 22, the socket part being flanged to provide a fin 21 and the interior surface of the tubular member being substantially even. The heating element 17 is in the form of a nickel chrome wire wound on a threaded tubular refractory member and runs at 900-1000‹C. The inner face of the tubular member is coated with a heat absorbing layer such as lamp black. The heater may be mounted in a case (not shown) having air inlets at the bottom and an outlet at the top to form a convection heater. Specification 474,503, [Group XIII], is referred to.
Patent GB-1089951-A (GB)
Title: Radio frequency spectrum generator
IPC: H03L7/20
Filed: 1965-03-25
Abstract: 1,089,951. Pulsing carrier frequencies; automatic frequency control systems. GENERAL DYNAMICS CORPORATION. March 25, 1965 [April 3, 1964], No. 12804/65. Headings H3A and H3R. A spectrum generator comprises an amplifier 18, Fig. 3, having an input connected to a resonant circuit 38 through switching means 16 which is pulsed so that the amplifier generates bursts of oscillations at the resonant frequency of circuit 38. The circuit is of the Colpitts type with the emitter of transistor 18 coupled to the resonant circuit through a potential divider formed by capacitors 32 and 34. The capacitor 42 of the resonant circuit is of the voltage-variable type so that the circuit can be tuned by a voltage applied to resistor 44. Transistor 16 is supplied with rectangular pulses causing it to conduct and thereby enabling the circuit to oscillate for the duration of the pulses. These pulses may be derived by frequency division from a crystal oscillator and have a frequency of 10 kc/s. The output of the spectrum generator may feed a phase detector 50, Fig. 1 (not shown), the other input of which is supplied by a variable frequency oscillator 52 which is controlled by the phase detector so that it tracks the centre frequency of the spectrum. A common D.C. tuning voltage source 54 may be used to set the initial frequencies of the spectrum generator and the variable frequency oscillator 52. The output of oscillator 52 may be supplied to the mixer of a radio transmitter or receiver.
Patent GB-1419766-A (GB)
Title: Elastic garment ban'
IPC: A41F9/02
Filed: 1972-03-20
Abstract: 1419766 Elastic bands for garments COURTAULDS Ltd 19 March 1973 [20 March 1972] 12863/72 Heading A3V A preformed elastic garment band intended to be fitted around the periphery of a garment opening comprises a length of elastic material 5 and a sheath of textile material 6, the longitudinal edges 7 and 9 of the textile sheath 6 overlapping each other and being secured together while the sheath of textile material is secured to the elastic material solely by stitching as at 13. The overlapping edges 7 and 9 may be secured together by adhesive 10 in a continuous ribbon or in discrete patches and a line of stitching 15 which secures the band to a garment edge portion 14 also serves to join together the edges 7 and 9 permanently. In an alternative embodiment the edges of the textile sheath are secured together and the sheath is secured to the elastic simultaneously in one line of stitching. The elastic material 5 may be a perforated rubber sheet which allows circulation of air and water vapour or it may consist of an elastic textile material. The various lines of stitching preferably comprise expansion stitches.
Patent GB-1005338-A (GB)
Title: Semicrystalline glass-ceramic body and method of making it
Inventor: MACDOWELL JOHN FRASER
IPC: C03C10/00
Filed: 1964-03-26
Abstract: A semicrystalline glass-ceramic body is made by melting a glass-forming composition, simultaneously cooling below the transformation point and shaping, exposing the shape to a temperature of 1000-1600 DEG  C., and, after the desired crystallization, cooling to room temperature. The composition is substantially free from TiO2 and consists essentially in per cent by weight of: Al2O3, 35-70; SiO2, 10-64; not more than a total of 40% of at least one modifying oxide in the proportion: P2O5, 1-20; Li2O, 4-10; Na2O, 4-10; K2O, 1-15; Rb2O, 4-25; Cs2O, 4-15; CaO, 4-10; SrO, 4-10; BaO, 4-40; La2O3, 4-20; and a total of 0-40% of at least one refractory oxide in the proportion ZrO2, 0-25; ThO2, 0-30; MgO, 0-20; or BeO, 0-10.  The preferred heat treatment schedule is a two-step process: (a) 1000-1200 DEG  C. for 1-4 hrs., followed by (b) 1400-1600 DEG  C. for 6-12 hrs.; or, alternatively, in a one-step process the body is held at e.g. 1000 DEG  C. for e.g. 24 hours or longer.  The crystals formed are predominantly of high alumina compounds, e.g. mullite.
Patent GB-961429-A (GB)
Title: Production of tubular or hollow parts or members
IPC: B21D26/08
Filed: 1963-04-01
Abstract: 961,429. Making helically grooved tubes; stamping. AEROJET-GENERAL CORPORATION. April 1, 1963 [April 12, 1962], No. 12873/63. Headings B3A and B3Q. A method of producing a recess in the inner surface of a hollow part having at least one open side, comprises removing material from the outer surface of the part to produce the required recess when transferred to the inner surface of said part, positioning the part in a mould having a continuous inner surface abutting the whole unmachined outer surface of the part, positioning a quantity of explosive in said part, sufficient, when detonated to drive the material of the part underlying the areas from which material has been removed into abutment with the bore of the mould, detonating the explosive and removing the formed part therefrom. A tubular metal workpiece, Fig. 3, having an internal helical groove 11 formed in its central portion is made by turning the desired groove form on the outside diameter of a tubular blank 10 which is then positioned within a closely-fitting, split or one-piece, mould 12 having end seals 35 and secured to a base 21. A positioning spider 27 positioned over the mould supports a rod 32 of explosive, a primacord charge or an explosive liquid filled plastic tube and a detonator contained in a liquidproof canister 33 suspended within the blank 10. Prior to firing the explosive to deform the blank against the bore of the mould to produne the grooves 11 in the bore of the blank the space between the outer diameter of the blank and the bore of the mould is evacuated to 28 inches of mercury and the assembly placed in a deep tank of water, e.g. 9 feet deep.
Patent GB-528632-A (GB)
Title: Improvements in or relating to thermionic valve amplifiers
IPC: H04B1/16
Filed: 1939-05-01
Abstract: 528,632. Valve amplifying and generating circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. May 1, 1939, No. 12981. Convention date, April 30, 1938. [Class 40 (v)] An amplifier comprises a pair of valves in cascade the coupling being such as to produce a different phase change for signals above and below a critical frequency and having a common cathode feedback coupling so that the feedback is positive above and negative below the critical frequency. In this way intermittent or fluttering action of the oscillator, on the short wave bands, due to supply fluctuations when a common supply is used in a superheterodyne receiver is prevented. The Figure shows a superheterodyne receiver in which the coupling 25, 28 between the low frequency amplifier 13 and the output 21 is chosen to produce a critical frequency at 60 to 80 cycles. By the use of a small byepass condenser 24 positive feedback is produced by the common resistor 19 above the critical frequency and up to 1,000 cycles while below the critical frequency the feedback is negative due to the phase shift in the coupling 25, 28.
Patent GB-101542-A (GB)
IPC: H02K21/32
Filed: 1916-09-13
Abstract: 101,542. Naberes, J. B. Sept. 18, 1915, [Convention date]. Telephone calling-apparatus.-A magneto for telephone calls is provided with a commutating or interrupting device arranged to short-circuit the armature or to interrupt its circuit several times during each revolution of the armature. In the form shown, a ratchet-wheel b on the crank-spindle oscillates a pawl c which intermittently makes contact with the ratchet-wheel. The pawl may have a flexible blade i which engages two contacts j arranged above and below the blade so as to double the number of circuit interruptions.
Patent GB-436642-A (GB)
Title: Improvements in or relating to electrical condensers
IPC: H01G4/228
Filed: 1935-05-01
Abstract: 436,642. Condensers. SPORING, P. A., Lindsay Lodge, Park Road, Hampton Hill, Middlesex, and TELEGRAPH CONDENSER CO., Ltd., Wales Farm Road, North Acton, London. May 1, 1935, No. 13008. [Class 38 (ii)] Closure and contact-making means for a rolled condenser 8 comprise a closing disc 1 with bent-up rim 2 and a contact means 5 of smaller diameter, provided with spikes 6 and connected to the closure disc by means of a strip 7. The end of the tubular casing 9 may be flanged over the rim 2.
Patent GB-108759-A (GB)
Title: Improved Apparatus for Mechanical Refrigeration.
Inventor: CACHEMAILLE ALFRED STUART
IPC: F25B1/04
Filed: 1916-09-13
Abstract: 108,759. Cachemaille, A. S., (Bertsch, J. C.). Sept. 13, 1916. Channels in rotary pumps.-In a compression refrigerating-machine employing ethyl chloride, methyl chloride, rhigolene or like fluid as the refrigerant and comprising a rotary pump or compressor 30 submerged in water in a tank 10, and a lubricant separator 44, the lubricant (glycerine) passes from the bottom of the separator through a passage 19 into spaces 31, 36, Fig. 1, at each end of the compressor, and is supplied through passages 32, 35 in the ends or covers 33.
Patent GB-684864-A (GB)
Title: Improvements in the manufacture of cardboard packets or boxes
IPC: B31B3/46
Filed: 1950-05-25
Abstract: 684,864. Pressing or shaping box parts. GAMBLE, H. May 25, 1950, No. 13128/50. Class 100 (ii). Tray-like box parts are made by pressing and drawing a tray out of flat board with the aid of heat and bending the material to form a single ridge of arcuate cross-section around the edge of the bottom panel, the ridge being formed without any substantial alteration in the thickness of the material. A sheet of thin board 1, which may have the corners cut out, is placed over a die block 2, heated by an electric heater 9 and having a narrow convex arc-shaped ridge 8, the edges of the board 1 being pressed down by a flange 4 of a punch secured to a ram 3, while an inner plate 5 of the punch having a concave groove 7 is pressed by a spring 6 to form the ridge 13. The plate 5 is carried on a stem 10 slotted at 11 to receive a guide pin 12. To form a shoulder box, the neck 14 of the box may be made by sticking a thin scored strip inside the bottom tray and the two parts joined by a paper hinge secured by adhesive.
Patent GB-627497-A (GB)
Title: Improvements in electric discharge tubes furnished with luminescent material
IPC: C09K11/67
Filed: 1946-05-01
Abstract: 627,497. Luminescent materials. PHILIPS LAMPS, Ltd. May 1, 1946, No. 13166. Convention date, May 1, 1945. [Class 39 (i)] A luminescent material is prepared by heating a mixture of a titanium containing compound and one or more compounds of zirconium, hafnium, thorium, germanium and tin. The mixture may also include one or more compounds which yield the acidic oxides sulphur trioxide, boron trioxide, phosphorus pentoxide or silicon dioxide and one or more compounds, e.g. carbonates, nitrates or acetates, which yield the basic oxides of sodium, potassium, rubidium, caesium, lithium, barium, calcium, strontium, magnesium, beryllium or zinc. The mixtures are heated in a non-reducing atmosphere. Examples given include zirconium oxide and .001-10 mol. per cent TiO2-green fluorescence; magnesium stannate and titanate, blue fluorescence; calcium zirconate and titanate-blue ; and zirconium phosphate and titanium phosphate-blue. The materials may be used jointly or with others. Specifications 612,085 and 614,122 are referred to.
Patent GB-341816-A (GB)
Title: Improvements in and relating to casting machines
IPC: B22D17/06
Filed: 1930-04-29
Abstract: 341,816. Casting-machines. RONDEL, F. and IOCHUM, G., 144, Boulevard de la Villette, Paris. April 29, 1930, No. 13213. Convention date, May 18, 1929. [Class 83 (i).] Metal-p o u ring ; moulds.- A casting- machine has a mould, in a carriage 17, with a depending pipe 25, communicating with its cavity, through which is supplied, as the mould &c. is lowered, first hot gases and then molten metal. The pipe 25 is adapted to engage a passage through the fireproof lining 1 of a gasheated furnace 3 containing a melting-pot 5. The carriage 17 is held in its upper position by a weight 35 but can be moved down by levers 39 engaging the upper wheels 24 of the carriage, these levers also closing a valve 46 in the chimney 12 and opening a valve 57, to supply compressed air to the furnace 3, thus forcing heated gases through the pipe 25 and mould. As soon as the pipe 25 enters the molten metal the mould is charged and a handle 60 is moved to the left to close a valve 10 in the air pipe 9 and, by engaging a tail 19, Fig. 2, to move a slide valve 18 to close the gate 20 of the mould and divert the metal in the pipe 25 through a passage 21 into the chimney. The handle is then raised whereby metal in the chimney is discharged back into the pot 5. Additional metal may also be fed to the pot from a tray 74 via the chimney.
Patent GB-1146912-A (GB)
Title: Electrical machine with liquid cooling of a stack of laminations
IPC: H02K1/20
Filed: 1966-03-25
Abstract: 1,146,912. Jointing. LICENTIA PATENTVERWALTUNGS-G.m.b.H. 25 March, 1966 [26 March, 1965], No. 13249/66. Heading B3V. [Also in Division H2] In an electrical machine having a liquid cooled laminated part 10, e.g. the stator core of a turbo generator, the laminations are secured together by tension rods 12 contained within bores 11 formed in the part 10, which are lined with an insulating layer 13 such as a plastics material and between at least one of the tension rods 12 and its insulating layer 13 there is at least one passage 17 for the flow of the cooling liquid. The core is constructed by assembling a metal tube 14, 0-ring seals 30 and bellows seal 31 around the ends of each tension rod and applying a layer of insulation to the walls of the bores 11 and/or the metal tube 14. Each metal tube 14 and tension rod are then positioned within each bore 11 and plastics material is poured, forced or injected into the gap remaining between each tube 14 and bore 11, this gap being preferably evacuated before the plastics is applied. As shown the laminations are clamped between end plates 19 arranged in a star formation (Fig. 6, not shown), the radially inner parts of which may be forked so as to pass between two winding slots. The end plates 19 are compressed by plate springs 34 and nuts 32 secured to each end of the tension rods, each being surrounded by a magnetic shield 37. The tension rods may have spiral cooling passages instead of the axial passages 17 shown or the tension rods may be spaced from the insulating layer 13 to form annular cooling passages. Radial cooling passages (38, Fig. 3, not shown), may be formed by metal rings (39), welded or riveted between the laminations for the removal of cooling gas, which may be forced into the gap between the rotor and stator by fans mounted on the ends of the rotor. Cooling liquid flows through the stator conductors (46, 47, Fig. 5, not shown), in the same direction as through the passages 17. In an alternative assembly of the core (Figs. 7 and 8, not shown), the tension rod is surrounded by a flexible tube (62) of polytetrafluorethylene which is inserted into and pressed against the wall of the bore 11 in the presence of heat. The end of the tube (62) is bent to form a sealing flange (71).
Patent GB-432139-A (GB)
Title: Improvements in cattle watering bowls
IPC: A01K7/06
Filed: 1934-05-03
Abstract: 432,139. Drinking appliances for animals. SHANKS, J. K., and CRUIKSHANK & CO., Ltd., Denny Iron Works, Stirlingshire. May 3, 1934, No. 13368. [Class 5(ii)] A cattle watering bowl of the type in which a water inlet valve is actuated by a nose piece within the bowl is provided with an horizontally extending valve and a vertical or substantially vertical nose piece. The bowl a and the valve chamber b are cast integral with each other, the valve spindle g passing through a member e provided with a valve seat f against which the valve head h is normally held by a spring d arranged in the chamber b. The member e is secured in position with the valve and the valve seat projecting through a hole between the bowl and the chamber b by screws passing through lugs el. The vertical nose piece i is pivoted by a pin passing through holes in two lugs at its upper end and through the member e. On being passed back the nosepiece bears against the end of the valve spindle and opens the valve; a lever k may be turned to lock the nose plate against rearward movement. A lip n deflects the water downwardly into the bowl. Specifications 224,714 and 252,895, [both in Class 5 (ii)], are referred to.
Patent GB-1081746-A (GB)
Title: Washing machine lid lock
IPC: D06F49/00
Filed: 1965-03-30
Abstract: 1,081,746. Machinery safety devices. WESTINGHOUSE ELECTRIC CORPORATION. March 30, 1965 [May 25, 1964], No. 13471/65. Heading F2J. A washing-machine has its lid 11 locked by a bolt 23 actuated by a pneumatic mechanism responsive to rotation of the shaft driving the spin-drying basket. A pneumatic pump 20 is driven by a linkwork 31-39 operated from a cam 30 on the shaft 14. Air under pressure from the pump 20 enters a chamber 22 by a flexible tube 21 and moves a diaphragm against a spring, causing the slide rod 23 to move into the locking position engaging a hole 60 of the lid, excess air being bled off through a bleed hole. When the shaft ceases to rotate the pressure in chamber 22 is reduced to atmospheric by the bleed hole and the locking bolt is withdrawn.
Patent GB-889436-A (GB)
Title: Improvements relating to displacement measuring devices
Inventor: WHITE ERIC LAWRENCE CASLING
IPC: G05D3/14
Filed: 1957-04-27
Abstract: 889,436. Measuring distances by sound waves. ELECTRIC & MUSICAL INDUSTRIES Ltd. April 25, 1958 [April 27, 1957], No. 13488/57. Class 40(7). Displacement is measured by sensing the delay of a periodic phenomenon in travelling along a guide between two points therein, the separation between the points following the displacement; the guide may be an enclosed column of fluid or a solid wire, bar or tube. A machine tool slide 1 traverse is caused to follow the rotation of a shaft 7 by comparing the phase of the output of phase shifter 8, fed from fixed receiving coil 18, with that of receiving coil 11 moved along wire 13 by cantilever 10a fixed to the slide. The wire is energized magnetostrictively by transmitting coil 16 at a frequency so controlled from the phase comparison of the output of fixed coil 20 with that of 18 that the wavelength in the wire is constant. Pulses are transmitted from coil 17 into a second wire 14 the voltage output from converter 23 being compared with that of geared-down potentiometer 9 to provide a coarse scale. The wires are terminated in vibration absorbers to reduce reflexions. Phase shifter 8 is preferably constructed as described in Specification 859,942 [Groups XXXVI and XL(b)]
Patent GB-560186-A (GB)
Title: Improvements in or relating to terrestrial and/or celestial globes
IPC: G09B27/08
Filed: 1942-09-25
Abstract: 560,186. Globes; maps. HOLMAN, L. J. Sept. 25, 1942, No. 13489. [Class 146 (ii)] A terrestrial or celestial globe is constructed from a set of eight flat map-sections of the form shown, the maps being drawn on the gnomonic projection, and each section consisting of a central equilateral triangle a having an isosceles triangle b based on each of its sides. The sections are each bent about the sides c of the equilateral triangle, and their adjacent edges are secured together temporarily or permanently by the aid of margin strips d, so as to form a polyhedron, which approximates in form to a sphere. The map-sections may be used side by side, instead of being built up into a globe.
Patent GB-972806-A (GB)
Title: Sonic generation
IPC: H03B11/10
Filed: 1962-04-09
Abstract: 972, 806. Sonic transducers. BENDIX CORPORATION. April 9, 1962 [May 1, 1961], No. 13630/62. Heading G4F. [Also in Division H3] A piezo-electric or magneto strictive sonic transducer 78 is energized by a parallel resonant circuit 68 which is put into oscillation by D.C. pulses from power supply 14 fed through an induc- ,tor 64 and a silicon controlled rectifier 66 switched on at a frequency exceeding the natural frequency of the resonant circuit by an amount not exceeding 50%. The rectifier 66 is switched by pulses from a conventional pulse generator including a unijunction transistor 44 and a further transistor 52. The operation is as follows:- Initially capacitor 48 is not charged because both plates are connected to +ve(point 38) through resistors 46, 50. Emitter 45 is therefore at the potential of point 38. An emitter to base B 1  current flows via resistor 50 (which is less than resistor 46) and capacitor 48 which charges up rapidly due to the decrease in emitter-base B 1  resistance, reducing the emitter voltage rapidly until the emitter current ceases. Capacitor 48 now discharges through 46 and 50 until the emitter potential is sufficiently positive for the cycle to recommence. The charging of capacitor 48 through 50 produces a voltage across the resistor sufficient to overcome the bias of diode 54 so that transistor 52 conducts, and a current pulse flows through resistors 56, 58 while capacitor 48 is charging. The pulse recurrence frequency exceeds the natural resonant frequency of circuit 68 by not more than 50% preferably 25%. The rectifier 66 is switched on by each current pulse applied to control electrode 82 from point 60 so that current from point 23 charges capacitor 70 until the charge on it equals that on capacitor 22. The rectifier 66 is switched off by the subsequent collapse of the fields built up round inductors 64, 72 which force more current into capacitor 70 and therefore increase its voltage to a value above the supply voltage. The anode therefore becomes negative with respect to the cathode and the rectifier is turned off. This action is accomplished rapidly by making the pulse generator frequency greater than that of the resonant circuit 68.
Patent GB-565395-A (GB)
Title: Improvements connected with shields for use in electric arc welding
IPC: A61F9/06
Filed: 1943-08-21
Abstract: 565,395. Welders' shields. ALSTON, L..P., and TEALE, W. R. Aug. 21, 1943, No. 13656. [Class 97 (i)] [Also in Group XII] A shield for use in electric arc welding is provided with an observation opening which is closed automatically by one or more semi - transparent screens when the electric arc is struck by the operator, the screens being opened automatically when the arc is broken. As shown in Fig. 2, the shield 4 has an observation opening 9 over which are arranged pivotted semi-transparent screens 6 interconnected by a rod 10 which is moved upwards by a spring 11 to open. the screens. The lower end of the rod 10 forms the armature of an electromagnet or solenoid 12 which is energized when the arc is struck and pulls down the rod 10 to close the screens. On breaking the arc, the solenoid is de-energized and the screens are opened by the spring 11. Fig. 4 shows a modification in which the opening in the shield is provided with sliding screens 13 operated by levers 15 and a system of rods and links 17 ... 21. The rod 21 is operated by a solenoid 22 when the arc is struck to close the screens. On breaking the arc the screens are opened by the spring 23.