baber/WOPTO huggingface dataset:
Patent GB-512789-A (GB)
Title: Improvements in or relating to the control of the harmonics in polyphase alternating current systems
IPC: H01F27/38
Filed: 1938-03-14
Abstract: 512,789. Transformers; inductances; supply systems. SIEMENS-SCHUCKERTWERKE AKT.- GES. March 14, 1938, No. 7923. Convention date, Jan. 8. [A Specification was laid open to inspection under Sect. 91 of the Acts, Sept. 14, 1938.] [Class 38 (ii) and 38 (iv)] In a polyphase A.C. system in which unbalanced harmonics are .produced by apparatus such as transformers or choking coils having asymmetric cores (e.g., cores with limbs in one plane) an auxiliary transformer or choking coil having a saturated core is associated with a selected phase or phases to form such an unbalanced harmonic load as to restore balance to the harmonics of the system. For exsample, a saturated, single phase choke 3, Fig. 1, may be connected in parallel with the centre limb winding of a star, delta, or zig-zag connected transformer or choke, the figure showing the delta arrangement. In the case of a starconnected transformer or choke winding 5, Fig 2, in which the neutral point is inaccessible, a saturated single phase choke 3 is inductively associated through a coupling winding 4 with the centre limb winding. Fig. 4 shows an arrangement in which the auxiliary harmonic loading device is in the form of a single phase auto-transformer 3, 8 associated with the main transformer or choke 7. The auxiliary transformer or choke may in all cases be regulated by tappings or displaceable core parts.
Patent GB-1463363-A (GB)
Title: Measuring the thickness of layers
IPC: G01N23/203
Filed: 1974-02-21
Abstract: 1463363 Backscatter thickness measurement HELMUT FISCHER GmbH & CO 21 Feb 1974 [9 March 1973] 7985/74 Heading G1A The thickness of a layer on a carrier is determined from a backscattered radiation count by means of a digital computer fed with data corresponding to the count rates from layers of zero and infinite thickness and with constants depending on the radiation source and the materials of the layer and carrier. The thickness count is first normalized to a value between 0 and 1 representing the fractional count rate relative to those for infinite  and zero layer thickness. An equation is given relating this normalized count to the other parameters and this is inverted to enable the thickness of the layer to be calculated. The measurements are made by a #-radiation backscattering system, the output of the detector being applied to the computer, which may be a special purpose or a suitably programmed general purpose machine, provided with a digital read out. The radiation source is selected in accordance with the atomic number and expected thickness of the layer and tables are used to give values of constants depending on this source and the particular materials of the layer and its supporting carrier. Alternatively the constants may be determined by calibration measurements on standard samples. These constants are entered into the computer and the apparatus is operated to determine the counting rates for layers of zero and infinite thickness which are also entered. The mode of operation is then changed to give a read out of the thickness of the sample layer being measured. An alternative mode of operation allows the display of the normalized counting rate. In a special purpose computer described the measurement period is determined by a timer which operates a pulse gate to the input of a divider the division ratio of which is varied inversely as the length of the time interval. A further adjustable divider is included in the processing chain to restrict the displayed count to three significant digits. In an example the thickness of a layer of Sn on a Ni carrier is determined using a T1 source. Pm, Ru, Sr and Ra sources are also mentioned.
Patent GB-456106-A (GB)
Title: Improvements in or relating to boxes or cartons
IPC: B65D5/70
Filed: 1936-03-18
Abstract: 456,106. Boxes etc.; powder distributers. LINGARD, T. M., ANGUS, J. A., and MOORE, H., 34, Moorfields, Liverpool. March 18, 1936, No. 8062. [Classes 18 and 66] Two or more of the overlapping closure flaps of a box &c. are formed with scorings or weakenings arranged to register when the flaps are closed down and secured together. The scorings &c. define parts such as 20, Fig. 2, adapted when broken inwardly to afford a pouring opening through which the finger may be introduced to break out a panel 21 affording a larger opening, or if desired the large panel 22 defined by the boundary scorings may be broken and displaced about the line 19. In place of scorings or weakenings notches, such as 45, Fig. 6, in register with the scorings 46 .... 48 may be provided in the outermost flap to facilitate the opening.
Patent GB-641312-A (GB)
Title: Improvements relating to driving arrangements for the spinning containers of centrifugal spinning, twisting and analogous machines
IPC: D01H1/08
Filed: 1948-03-18
Abstract: 641,312. Spinning yarns. PRINCE-SMITH & STELLS, Ltd., and FEATHER, E. E. March 18, 1948, No. 8123. [Class 120(ii)] A driving arrangement for the spinning containers 7 of centrifugal machines &c. having an elevatable front carriage (not shown) and driving tapes 8 for the containers, is characterized by an actuator arm 32 arranged in the path of angular movement of the tape tension pulley lever 14 and adapted to be contacted thereby when the tape breaks, the arm 32 being connected to a finger 34 which then operates a switch 35 controlling an electromagnetic circuit 40 in the front carriage release mechanism 46 to permit tbe carriage to rise and unwind the contents of all the containers on to the receiving bobbins, the containers which have lost their tape, through breakage, unwinding of their own momentum. Attached to the lever 14 is a link 27 formed with two notches 25, 26; the notch 26 cooperating with a pin 24 on a stationary member 22 to prevent the tension pulley 12 from falling against the tape guiding pulley 9. while, if it is not required to replace the broken tape immediately, the link 27 may be moved until the notch 25 engages the pin 24 and the remainder of the machine may then be run in normal fashion.
Patent GB-1533047-A (GB)
Title: Oven with fan
IPC: F24C15/32
Filed: 1976-03-02
Abstract: 1533047 Cooking ovens INTERNATIONAL STANDARD ELECTRIC CORP 2 March 1976 [5 March 1975] 08350/76 Heading F4W A cooking oven comprises a fan unit including an impeller 12 and a driving motor 3, which unit is mounted on to the inside of the back wall 1 of the cooking chamber. The fan unit also includes a motor cooling impeller 11 and a mounting flange 10 which is secured to wall 1 by screws 8 which engage nuts 14 fixed to wall 1. A heat insulating board 13 may be interposed between the flange 10 and the motor 3. In Fig. 3 (not shown) a resistance heating coil (15, Fig. 3) and a partition (16), are also mounted on the back mounted flange. The impeller 12 is of the centrifugal-or axial-flow type.
Patent GB-537643-A (GB)
Title: Improved web-guide for printing-telegraphs and like machines
IPC: H04L13/06
Filed: 1940-05-10
Abstract: 537,643. Typewriters &c. CREED & CO., Ltd., and EDDY, W. H. May 10, 1940, No. 8449. Convention date, July 13, 1939. [Class 100 (iv)] In a printing-telegraph or like apparatus in which a web 32 is led from a stationary roll 11 to a movable device such as a platen, the web is guided by means of a frame 18 which is pivoted at 22 to the housing 17 and is provided with parallel rods 26, 27, the web passing over the rods and thence, through a slot 28, to the platen. The frame, by tilting to one side or the other during letter-spacing and return movements of the platen, distributes the pull evenly across the web, directs the web perpendicularly to the platen, and prevents interleaved carbons from creeping beyond the edges of the web. A stud 24 co-operates with a slot to limit tilting of the frame. The roll may be mounted in a yoke 15.
Patent GB-1109616-A (GB)
Title: Block polymer for use in impregnating varnishes
Inventor: MARSH JOHN FREDERICK
IPC: C08J5/24
Filed: 1966-02-25
Abstract: A butadiene-styrene block copolymer having the formula B-S-B where B is a block of polybutadiene comprising at least 50% of 1,2-enchained butadiene units and S is a block of polystyrene, the block copolymer comprising 20 to 30 mole per cent of styrene and 150 to 350 monomer units per molecule.  The copolymers are obtained by sequential polymerization in solution in the presence of an organolithium initiator and a co-catalyst.  Impregnating varnish solutions are obtained by mixing the copolymers with a solvent, such as toluene.
Patent GB-735363-A (GB)
Title: Improvements in and relating to support bars or cap pieces for mines and other uses
IPC: E21D17/086
Filed: 1953-03-27
Abstract: 735,363. Mine roof support. USINES ET ACIERIES ALLARD SOC. ANON. March 27, 1953 [July 3, 1952], No. 8502/53. Class 20 (2). A support bar for mines having male and female ends, the bars being adapted to be assembled by a wedge key 8, comprises pivot pins 6 on both sides of the male end adapted to engage recesses 9 in the fork of the female end of the next bar which is provided with a pin 12 adapted to support a projecting part 3 of the male part to sustain the bars when the key 8 is withdrawn. In assembling, after the bars are engaged, the key 8 is driven into aperture 7 in the male end while engaging surfaces 15 on the female end. The key 8 can be driven in from either side.
Patent GB-100742-A (GB)
IPC: F02P7/02
Filed: 1916-06-17
Abstract: 100,742. Mason, C. T. June 19, 1915, [Convention date]. Inductor-alternators. - In ignition generators as described in Specifications 8128/13, 8964/13 and 29655/13, the primary winding is connected to the interrupter by an encased lead g<21> as described in Specification 100,031. The distributor is connected to the high tension winding by a trunk conductor d<5> which bears on an arc-shaped plate g<11>, Fig. 5 (Cancelled). The Specification as open to inspection under Sect. 91 (3) (a) states that the arc-shaped plate has an extension g<13> forming with the frame a safety spark-gap. The armature windings are placed on a core g<6>, which has pole pieces g<7>, g<8> projecting into a brass or white metal bushing g<22> in which the inductor rotates. An air gap g<23> left in the bushing has a mica cover - plate. The bush carrying the armature is adjustable with the interrupter for timing, the plate g<11> moving with respect to the conductor d<5>. This subject-matter does not appear in the Specification as accepted.
Patent GB-512852-A (GB)
Title: Improvements relating to slicing machines
IPC: B26D7/32
Filed: 1938-03-22
Abstract: 512,852. Slicing-machines. BERKEL & PARNALL'S SLICING MACHINE MANUFACTURING CO., Ltd. (Maatschappij Van Berkel's Patent N.V.). March 22, 1938, No. 8734. [Class 28 (ii)] The knife 1 of a slicing-machine is so arranged that the cut is effected as the carriage 9 travels in the direction of the arrow B towards the. operator's position A. The slice conveyer 4 is oscillated by a cam or eccentric, on the crankshaft 14 which actuates a rocking-lever 21 having a quadrant 24 meshing with a pinion 25 on the conveyer. The slice is attached to the prongs 23 by a plate 8 as the conveyer moves it to the discharge position in front of the fly 7 which deposits it on the receiver 3. The substance may be fed to the knife by positive feed-mechanism, or by hand, spring or gravity feed means involving the use of an adjustable slice-thickness gauge. The knife,is driven by bevel gearing 17, and the fly 7 is driven, in known manner, by a cam on the crank-shaft 9. In modifications, the carriage is of the pushpull type, or the knife may be driven by a motor, the carriage being driven from the knife drive. The slice-thickness gauge plate, if provided, may be pivotally mounted to facilitate cleaning, and the knife may have an abutment plate which is pivoted for cleaning.
Patent GB-569657-A (GB)
Title: Improvements in or relating to the polymerisation of organic materials
IPC: C08F36/16
Filed: 1941-07-11
Abstract: <PICT:0569657/IV/1> The polymerization of 2-halogen-butadiene-1-3 is effected in an emulsion which is fed into a polymerization apparatus in which it flows downwardly slowly and from which it is continuously withdrawn.  In an example, chloroprene free from mono-and di-vinyl acetylene, acetaldehyde and dichlorbutene and containing 0.5 per cent of sulphur and 4 per cent of rosin is polymerized in an emulsion containing ammonium persulphate, sodium hydroxide and dinaphthyl methane sulphonic acid.  Several forms of apparatus are illustrated. Fig. 2 shows an apparatus in which the mixture to be treated is formed in a mixing tube 5 and circulated by a pump 27 through the reaction chamber 27, the product being withdrawn at 6. The reaction chamber is wide to avoid the mixing of polymers at different stages of polymerization and of polymers and unpolymerized material.  There may be several polymerization vessels in series, particularly when it is desired to effect the several stages of polymerization at different temperatures. Specifications 504,466 and 517,951 are referred to.
Patent GB-607858-A (GB)
Title: Improvements in or relating to perambulators
IPC: B62B9/08
Filed: 1944-05-10
Abstract: 607,858. Brakes for hand-propelled vehicles. BOTT, S. May 10, 1944, No. 8870. [Class 103(i)] In brakes for hand-propelled vehicles, that are applied by a spring when the propelling handle is released, the brake is controlled by a cable attached to a plug fitted to the handle and rotatable with it to release the brake. The perambulator brake shown comprises levers 6 pivoted at 6<SP>1</SP> to the frame and normally applied at the ends 8 to the wheels 4, 5 by springs 9. A Bowden cable 12 extends from a pin 13 in a slot in the levers, through the handle arm 17 to a plug 15 which fits in the bracket 16 and is secured within the handle 18 to rotate with it. The plug is grooved at 27 for the cable 12 and the base of the groove may be cam-shaped to enhance the pull on the cable when the handle is turned. In a modification, the handle and its arm are of T-form and only one part of the handle is rotatable.
Patent GB-565996-A (GB)
Title: Improvements in or relating to electrical switching devices for alternating current circuits
IPC: H01H9/56
Filed: 1943-06-03
Abstract: 565,996. Thermal switches ; interrupters. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., ROSEBY, P. N., and McNIATH, H. J. June 3, 1943, No. 8901. [Class 38 (v)] The movable contact member 32 of an A.C. switch is held in the closed position by an electromagnet 33 included in the switch circuit so that when a force acting downwards at 40 against the action of the magnet and of a spring 35 tends to move the member 32 from engagement with its contact 38, the actual break will occur when the A.C. current is passing through the zero point of its cycle and a sparkless break will occur. The force at 40 may be produced by a bimetal strip 31 having a heating coil in series with the switch contacts and the magnet and the device then acts as an interrupter which may be used for controlling a hot plate, the ratio of make to break being adjustable. In a modification, Figs. 1-2 (not shown), the moving contact strip 32 is also influenced by two bowed springs having a dead-centre action and in another modification, Fig. 4 (not shown), a rotary cam acts on the strip 32 through an intermediate adjustable wedge.
Patent GB-640458-A (GB)
Title: An improved method of dyeing cellulose acetate
Filed: 1947-04-02
Abstract: Dyeing of cellulose acetate is carried out from an aqueous dyebath containing (1) an acid dyestuff; (2) a lower aliphatic alcohol, an ester of an alcohol with an organic acid, or an acid which is a swelling agent for the cellulose acetate, and (3) from 1 to 6 per cent by weight of resorcinol, phloroglucinol or cyclohexanol.  The primary assistant (2) is preferably present as 10 to 35 per cent by volume if an alcohol or 2 to 3.5 per cent by weight if an acid, thus, 30 per cent by volume of ethanol may be used.  Alternatively, an ester may be used, e.g. butyl acetate, butyl formate, ethyl acetate and benzyl acetate.  Sulphuric acid is the preferred acid.  The concentration of the auxiliary assistant (3) may be 1 to 4 per cent if resorcinol or cyclohexanol or 1 to 6 per cent if phloroglucinol. The process is applicable to fabric, packaged yarn, skeins, films or sheets.  In the examples: (1) cellulose acetate yarn is dyed with Brilliant Wool Blue BL in a bath containing 30 per cent of ethanol and 3 per cent of resorcinol; (2) a fabric is dyed with Orange II in a bath of sulphuric acid and resorcinol; (3) a fabric is dyed with Anthralan Red BA in the presence of resorcinol and sulphuric acid. Other dyestuffs are listed as suitable, and similar results are obtained using cyclohexanol in place of resorcinol.  The dyeings are compared with those obtained under similar conditions using a mixture of acetic formic and sulphuric acids and using ethanol, both in higher concentrations and in the absence of an auxiliary assistant.
Patent GB-780130-A (GB)
Title: Improvements in electron tubes having a ceramic portion
Inventor: MURDOCK CLAYTON ELLSWORTH
IPC: H01J5/26
Filed: 1955-03-28
Abstract: 780,130. Ceramic-metal seals. EITELMcCULLOUGH, Inc. March 28, 1955, No. 8975/55. Class 36. [Also in Group XL (a)] A metallic wall section of an electron tube envelope is sealed to an abutting ceramic wall section by a thin metal flange which extends from the metal section to overlap the ceramic section, the flange having an inturned portion bonded to the ceramic. In the drawing, the metal section 7 has brazed to it a flange 32 which fits over the U- shaped flange 29 brazed to the metallized periphery of the ceramic section 2, the two flanges being finally brazed together as at 33. A similar joint is shown where the ceramic sections 2 and 3 abut on either side of the flat metal ring 12. The flanges 26 are brazed to the ring, with inturned portions brazed to the ceramic by such techniques as firing a coating of molybdenum, or molybdenum-iron, or titanium or zirconium hydride, on the ceramic, and then brazing or soldering to it. The flanges may be of copper sheet, about 20 mils. thick, so that they yield sufficiently to accommodate expansion differences between ceramic and metal. The thrust due to atmospheric pressure is taken by the direct abuttal of the two sections.
Patent GB-1222271-A (GB)
Title: Improvements in two-phase gas turbine engines having a power phase and a scavenging phase
IPC: F02C7/12
Filed: 1968-02-23
Abstract: 1,222,271. Gas turbine engines. REGIE NATIONALE DES USINES RENAULT and AUTOMOBILES PEUGEOT. Feb.23, 1968 [March 7, 1967], No.8997/68. Heading F1G. The invention relates to a gas turbine engine of the intermittent combustion type similar to that described in Specification 1, 221, 954 in which flow of combustion gases to the turbine is cut-off periodically and during the time the gases are cut-off, an inlet is opened for inflow of ambient air to the turbine for cooling and scavenging. In the present invention the engine comprises a single compressor, two combustion chambers and two turbines, the arrangement being such that as combustion gases are passing from one combustion chamber to one turbine cooling and scavenging air is being drawn through the other turbine. The engine shown comprises a single centrifugal compressor 2, two combustion chambers 8 and 8<SP>1</SP> and two turbines 3, 4 and 3<SP>1</SP>, 4<SP>1</SP> mounted on a common shaft 1 and disposed with their inlets adjacently, the turbines driving the compressor 2 directly, also an external load through reduction gearing. Air from the compressor passes through duct 54 which divides into two, one passing to the combustion chamber 8 and the other passing to the combustion chamber 8<SP>1</SP>, the air inlets to the chambers being controlled by a rotary valve member 16 which comprises a semi-circular slot 17. Atmospheric air inlet ducts 15, 15<SP>1</SP> connect with the ducts between the combustion chambers 8 and 8<SP>1</SP> and the turbines 3, 4 and 3<SP>1</SP>, 4<SP>1</SP> respectively, the inlets to the ducts being cut off sequentially by the rotary valve member 16 which has a semicircular slot 18 for this purpose. Fuel is supplied periodically to the combustion chambers by pump 22 and fuel injectors 9 and 9<SP>1</SP>. The rotary valve member 16 and the fuel pump 22 are driven from the shaft 1 through gearing. The air delivered by the compressor is pre-heated by means of a rotary regenerative heat exchanger 53 which is also driven from the shaft 1 through gearing; the rotary element 53 passes through the turbine exhaust ducts 55. While one turbine say 3<SP>1</SP>, 4<SP>1</SP> is being supplied with combustion gases as shown, the other turbine 3, 4 is receiving a flow of cooling and scavenging air from atmosphere through the open duct 15.
Patent GB-917219-A (GB)
Title: Improved method of making a titanium-base alloy
IPC: C22C1/03
Filed: 1961-03-13
Abstract: Titanium-base alloys containing tin and aluminium are produced by melting together titanium sponge and a master alloy containing 30-70% of titanium, the remainder being aluminium and tin in the ratio 2 : 1 by weight.  The final alloy may be made by pressing the constituent materials into electrodes, which are then arc-melted.  A master alloy containing 40% Ti, 40% Al, and 20% Sn is referred to.
Patent GB-127707-A (GB)
Title: Improvements relating to Electric Spark Gaps.
IPC: H01T13/39
Filed: 1918-05-31
Abstract: 127,707. Watson, E. A., and M-L Magneto Syndicate. May 31, 1918. Magncto - electric machines. - Spark-gaps of the annular type, particularly applicable as safety gaps for magnetos, are formed of a tube c of material having a high resistance, such as slate or carborundum, surrounding a stem a of like material or of metal. The tube electrode c may form a lining to a metal cylinder. The brush d bears on the magneto slip ring and the part e is connected to the distributor.
Patent GB-141041-A (GB)
Title: A process for producing very fine artificial threads from cellulose solutions
IPC: D01F2/06
Filed: 1920-03-29
Abstract: To obtain very fine threads from viscose by the drawing-out process, the viscose used is prepared from a "very weak hydrated cellulose," and the original relatively-thick threads are stretched while undergoing coagulation, in a slowly-acting precipitating-liquid, such as a one per cent sulphuric acid solution.  After leaving the coagulating-bath the threads are wound on reels revolving in a 2-4 per cent solution of sulphuric acid, by which they are finally hardened.
Patent GB-330973-A (GB)
Title: Improvements relating to the production and control of electric oscillations
IPC: H03B5/30
Filed: 1929-03-21
Abstract: 330,973. Lucas, H. J. March 21, 1929. Vacuum or low-pressure apparatus, arrangements of. - Relaxation oscillations produced by a circuit of the multivibrator or similar type are stabilized and controlled by means of a piezo-controlled oscillator. As shown, an oscillating valve set A controlled by a crystal Q and tuned at L1, C1 to a frequency of 50 kilo cycles is coupled to a coil L3 in one anode circuit of a reciprocallyconnected pair of valves B forming a highfrequency multivibrator and adjusted to 50 K.C. It is also coupled to a coil L2 in one of the grid circuits of a pair of valves C forming a multivibrator of the low-frequency type, and adjusted to 1 K.C. A range of controlled harmonic frequencies of from 1 to 50 E.C., in steps of 1 K.C., is obtained at the terminals E, and from 50 to 6000 K.C. in steps of 50 K.C. at the terminals D. The two outputs from D and E may further be combined to give a 1 K.C. modulation of each 50 K.C. step. In place of the quartz oscillators, a magnetostriction device or a tuning-fork operating on a frequency which is an harmonic of the fundamental frequency of the multivibrator may be used. Specification 295,081, [Class 40 (v), Wireless signalling &c.], is referred to.