baber/WOPTO huggingface dataset:
Patent GB-1039210-A (GB)
Title: Improvements in or relating to heat reflecting filters
IPC: G02B5/08
Filed: 1964-05-21
Abstract: 1,039,210. Infra-red filters. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. May 21, 1964 [May 24,1963], No.21034/64. Heading G2J. [Also in Division H1] A light-transmitting, heat-reflecting filter has a layer of lanthanum hexaboride. The reflectivity is a minimum at 6, 000 but rises somewhat toward the lower wavelengths and if it is desired to reduce this, it may be done by coating the filter with a quarter wave length optical thickness of CaF 2  or SiO 2 . A measure of the crystal size of the layer of lanthanum hexaboride may be made by measuring its surface resistance which should be less than 50 ohms and preferably less than 20 ohms.
Patent GB-1475685-A (GB)
Title: Polymeric article having reduced surface resistivity
IPC: C08J7/044
Filed: 1974-05-02
Abstract: 1475685 Anti-static polymeric coatings KODAK Ltd 2 May 1974 [3 May 1973] 21092/ 73 Heading B2E [Also in Division C3] Articles having polyethylene terephthalate surfaces are rendered anti-static by a layer of a polymer containing units of formula where R is H or alkyl, X<SP>-</SP> is a sulphuric or phosphoric acid anion and Z represents the atoms necessary to complete an optionally substituted pyridinium group. In Examples, polyethylene terephthalate films are coated with solutions of (1) poly(2-vinylpyridiniumphosphate), (2) poly(2-vinyl-N-methylpyridiniumphosphate) and (3) poly(2-vinyl-N-methylpyridiniumsulphate).
Patent GB-337799-A (GB)
Title: Improvements in paper-holding mechanism for typewriting and book-keeping machines
IPC: B41J11/48
Filed: 1929-07-09
Abstract: 337,799. Ellis Sterling Bookkeeping Machines, Ltd., Brock, J. H., and Leeder, F. J. July 9,1929. Sheet feeding and guiding arragements-A condensed-record arrangement comprises a hinged or loose paper-apron which can be depressed to permit of front insertion of a ledger sheet and is provided with hooks for limiting the movement of the feed-rollers when released; the arrangement may also comprise three pivoted bails for holding the ledger and record sheets. In the arrangement shown in Figs. 1 and 6, brackets 12 on the carriage support fixed shelves 18, 22 and a separate apr¾n 60 which is loosely mounted by means of ears 63 on screws 62 and rests on an arm carried by the releasing-shaft 73 for the feed-rollers 64, 65. The shaft has a groove normally engaging projections 72 on rocking arms 70 carrying supports 68 for the feedrollers. The shaft carries a finger-lever 74 having a cam 75 engaging one of the arms 70. When the shaft is rocked, the feed-rollers are released and the apron drops to permit of front insertion' of the ledger sheet, hooks 76 on the apron cooperating with the feed-roller spindle 66 to maintain the feed-roller in horizontal position and to prevent the rear feed-rollers from rising into contact with the platen 15. The ledger and record sheets are held in contact with the platen by means of rollers on a pivoted bail 42 connected to a spring 47. When pulled forwards to release the sheets, the bail is held by a pivoted latch 48 which can be released by means of a finger-lever 52 having a pin engaging a slot 51 in the latch. The record sheet is held in contact with the platen by means of rollers on pivoted bails 26, 32 connected to springs 29, 36 which are arranged to hold the bails either in contact with the platen or the shelves 22, 18. An adjusbable side-gauge 56 for the sheets is carried by the bail 42 and is secured by a screw 67.
Patent GB-1319182-A (GB)
Title: Controlled reaction systems
IPC: B01J10/00
Filed: 1971-04-19
Abstract: 1319182 Gas/liquid contact PARKSON CORP 19 April 1971 [9 Feb 1970] 21136/71 Heading B1F [Also in Division C1] A method of chemically reacting a gas and a liquid comprises continuously injecting the gas into a confined stream of the liquid flowing at a controlled rate, passing the gasliquid mixture through a tortuous flow path comprising parallel passes within a plate-type reactor to induce turbulence, controlling the temperature and pressure within the flow path to effect complete reaction, and removing the product from the flow path.  Figs. 2, 3, 4 illustrate alternative plate reactors for the ammoniation of phosphoric acid, indicated diagrammatically as 12 in Fig. 1. In Fig. 2 phosphoric acid of 32-72% P 2 O 5  content enters preheat zone 15 at line 11 and takes a flow path comprised by adjacent parallel passes 13 between plates 14, steam being supplied through three alternate passes 16 to heat the walls of the two intervening passes 13. Optionally the acid may be partially pre-ammoniated at entry. The acid then passes from preheat zone 15 to reaction cone 17, ammonia being injected into the stream at point 18 between the zones by means of an injection plate. The mixture then takes a tortuous flow path through zone 17 as shown by the arrowed lines. Reaction occurs with the evolution of water vapour, and a stream comprising water vapour, molten ammonium polyphosphate and unreacted NH 3 , if any, accelerates towards outlet 19. As in Fig. 1, this stream passes to cyclone separator 20 which discharges the phosphate at line 21 and the gases at 22. The gaseous effluent may be scrubbed with feed acid to extract unreacted NH 3 . In Fig. 3 (not shown) a further injection plate 23 is inserted after zone 17 to introduce water to quench the product and produce an aqueous fertiliser solution directly. From plate 23 the mixture enters cooling zone 24 comprising two passes 25 through which coolant circulates to cool intervening pass 26. In Fig. 4 (not shown) there is no preheat zone and the first plate is an injection plate through which NH 3  is injected into the superphosphoric acid entering at 30. The passes 31 comprising the reaction zone are cooled by alternate cooling passes 32 to prevent the polyphosphate reverting to orthophosphate. A composite fertiliser may be produced by injecting water, clay, potassium solutions and micronutrients at plate 33. The product then passes through cooling pass 34 and out of the reactor.
Patent GB-531406-A (GB)
Title: Improvements in or relating to wireless receivers
IPC: H03J5/12
Filed: 1939-07-20
Abstract: 531,406. Radio receiving apparatus. PHILIPS LAMPS, Ltd. July 20, 1939, No. 21153. Convention date, July 23, 1938. [Class 40 (v)] [Also in Group XXXVI] In push button mechanism for tuning radio receivers in which stop members operating the wave change switch are provided on the push buttons to the stops are adjustable in position relative to the operating mechanism so that any push button may be used on any wave length. In Fig. 2, depression of push button shaft 7 operates a lever 4 to rotate the condenser shaft 1 through toothed gearing 2, 3, and also causesa stop member 11 to strike against a lever 14 operating the wave switch 16 which is moved to different positions corresponding to different wave bands according as the member 11 is inserted in apertures 12 or 13 formed in the shaft 7. Accurate tuning of the condenser to the required wave length is obtained by adjusting the length of the part 9 extending from the shaft 7. In Fig. 5 the stop members 27, 28 are wedge shaped on one side and coact with the sides of apertures 31 formed in a:slider 30 controlled by springs 32, 33 and connected to the wave change switch 35 so that on depression of a push button the slider 30 is moved to the right or the left according to the position of the wedges and the wave change switch is operated correspondingly. By rotating the wedge through 180 degrees the press button may thus be converted from use on one wave length to another. In Fig. 9 each push button is. provided with two apertures 57, 58 in which rods 59 may be adjusted, the rods in the apertures 57 contacting on depression with-.a system of levers 62, 64, 65 white the rods.in the apertures 58 contact with a similar system of levers 63, 66, 67 the levers throwing the wave band switch to the required position. In Fig. 13, the mechanism comprises a scissor-shaped member comprising blades 84, 85 coupled by gear wheels 101, 102 to the wave change mechanism 99, 98. The blades 84, 85 are provided respectively with projections 86-88 and 89-91 arranged alternately side by side and co-operating with stop members 95, 96, 97 on the push button shafts 92, 39 and 94. Reference has been directed by the Comptroller to Specifications 509,511 510,360 and 516,385.
Patent GB-173721-A (GB)
Title: Holder for pencils, slate pencils, brushes and glass-cutters for the drawing of ellipses
IPC: B43L11/045
Filed: 1921-08-09
Abstract: 173,721. Hardt, J., and Sobawa, J. Aug. 9, 1921. Cutting glass.-In a device for holding pencils, brushes, glass-cutters &c. for tracing ellipses by means of a string, the ends of which are fixed in the foci, the pencil &c. is held by a set-screw 6 in a sleeve 1 or. which is mounted a roller to receive the string, and a laterally projecting arm 7 carrying a rod 9 provided with a rotatably mounted ball 11 at its end. In use, the pencil &c, is inserted in the sleeve 1 and the rod 9 is adjusted so that the ball just contacts with the surface. The string is passed round the roller 2 and lies between the roller and rod 9, so that the pencil is prevented from turning on its axis and is always kept in correct position relative to the surface.
Patent GB-230724-A (GB)
Title: Improved stroboscopic apparatus
IPC: G01P3/40
Filed: 1924-09-08
Abstract: 230,724. Czikan, L. Sept. 8, 1924. Stroboscopic apparatus, utilizing an induction coil having in its secondary circuit a flash tube which is synchronized with the movement of the element to be observed, has an oscillatory trembler device in the primary circuit provided with means for adjusting its rate of oscillation so as to produce the required interruptions of the current through the flash tube. The trembler 1 oscillates about a pivot 2, and is fitted with a blade contacting alternately with adjustable stops 3, 4. One end 17 of the trembler 1 moves the spring 11, normally in contact with the terminal 15 to break the circuit through the primary winding of the induction coil 8. The adjustment of the rate of oscillation is effected by adjusting either of the screws 3, 4, 15 or by moving the induction coil in relation to the trembler. Condensers 20, 21 are fitted in the primary and secondary circuits as shown.
Patent GB-1402399-A (GB)
Title: Telephone exchange circuits
IPC: H04M19/00
Filed: 1973-05-04
Abstract: 1402399 Automatic exchange systems STANDARD TELEPHONES & CABLES Ltd 4 May 1973 21236/73 Heading H4K A Stone type transmission bridge includes an impulse repeating relay IR which has each of its windings connected to a line wire via the emitter collector path of a respective transistor T1, T2 connected as a constant current amplifier. The bases of the transistors are connected to respective taps on a potential divider R1, 33K R , R2, 100K R  and R3, 33K R . Control functions e.g. relay contacts, may be inserted in series with IR as denoted by the dashed connection line in the battery lead.
Patent GB-735441-A (GB)
Title: Improvements relating to electric battery-filling devices
IPC: H01M50/673
Filed: 1952-08-25
Abstract: 735,441. Batteries. JOYCE, A. A. Nov. 24, 1953 [Aug. 25, 1952; March 12, 1953], Nos. 21338/52 and 6863/53. Class 53. A battery filling or topping-up device comprises a spigot 20 to fit the mouth of a bottle containing electrolyte and a nozzle 4 with a branch 12 connected to the spigot by a rubber connector 14. The spigot is covered with a rubber sheath 22 which is formed with projections 26 interlocking with recesses 27 in the free end of the spigot to prevent relative turning between the sheath and spigot. Within the nozzle 4 is a slidable tube 29, Fig. 12, having air and water passages 31, 30, the lower end of the air passage being cut away as shown at 34 and the water passage having at its upper end an opening 39, a smaller opening 40 being provided in the air passage. The top of the tube carries a valve head 38 which normally rests on a seat 36, Fig. 5, and cuts off the supply of liquid from the bottle. When the nozzle is introduced into the filling opening of the battery the tube 29 makes contact with the separators or a perforated plate covering them and is raised in the nozzle 4 causing the valve head 38 to open the passages 30, 31 to the chamber 35 in the upper end of the nozzle. Water then flows from the bottle down the channel 16 in the branch 12 and through the passage 30 into the battery. A channel 15 for the passage of air into the bottle is partially closed by a perforated disc 69. When the liquid in the battery reaches the nozzle it closes the passages 30, 31 and the flow of liquid from the bottle ceases and both passages 30, 31 become filled with liquid to the same height. On removing the device from the battery the tube 29 falls within the nozzle 4, as shown in Fig. 1. The valve 38 then closes on the seat 36 and the opening 34 is exposed which renders the effective length of the air passage 31 shorter than the passage 30 and both passages are emptied of liquid by syphon action. The lift of the valve head 38 may be limited by an adjustable screw 45. For ascertaining whether the electrolyte in the battery is above or below the required level a bulb 1 may be provided leading to a passage 3 in the nozzle, as shown in Fig. 3. The feel of the bulb when compressed gives the required indication. In an alternative construction instead of the device shown in Fig. 1 being attached to a bottle it is attached to the end of a receptacle 58, Fig. 20, supplied with water from a hose attached to the tube 60. Water is admitted to the receptacle and air allowed to escape by means of manuallyoperated valves 63, 64 which are so arranged that when the knob 65 is depressed the valve 64 opens to put the receptacle into communication with the atmosphere through a passage 62 before the valve 63 opens to admit the water. The filling opening of the battery may be provided with a depending adjustable tube serving as a guide for the nozzle and having a cross-bar or flange at its lower end to limit the extent to which the nozzle can be lowered into the battery.
Patent GB-276019-A (GB)
Title: Improvements in or relating to the manufacture of luminous electric discharge tubes containing rare gases
IPC: H01J9/395
Filed: 1927-08-13
Abstract: 276,019. Abadie, J. B. J. M. Aug. 14, 1926, [Convention date]. Gases, treating with electric discharge. -In luminous electric discharge tubes containing neon, helium, or other rare gas, the gas is purified before introduction into the tubes by an electric discharge or are between electrodes having zones of different temperatures caused by the arc, one or both electrodes being of an alkali or alkaline earth metal or metal of the tungsten group and the gas being circulated over the electrodes by convection. The gas to be purified is introduced into a bulb A, Fig. 1, through a drying tube B containing phosphoric anhydride. The pressure in the bulb A being preferably equal to or above atmospheric, an arc is passed between a molybdenum sheet b and calcium scrapings c held respectively in parts I, d steadied by projections f. Perforations k allow circulation of the gas over parts of the electrodes at different temperatures, each impurity such as moisture, hydrogen, oxygen, nitrogen and carbon compounds being absorbed at a particular temperature. The calcium is renewed after the purification process by working the vacuum pump until the discharge completely covers the electrodes and releases absorbed gases which are evacuated through a tube q. Alternatively, a fresh supply of calcium may be introduced, a ground joint r being provided.
Patent GB-136886-A (GB)
Title: Preset-feet for Sewing Machines.
Inventor: FAIRWEATHER WALLACE
IPC: D05B35/02
Filed: 1918-12-20
Abstract: 136,886. Fairweather, W., (Singer Manufacturing Co.). Dec. 20, 1918. Sewing-machines; presser-feet. - A presser mechanism for sewing- machines, of the type adapted to join and cover the raw edges of cut knit fabrics in one operation as described in Specification 122,863, comprises two separate shaped toe portions between which upturned edges of material are guided to the trimming- cutters. Two separate sole-pieces on the toe portions are adjustable in elevation to secure effective feed of fabrics of different thicknesses, which are to be joined edge to edge. Figs. 2 and 3 show the presser-foot in side elevation, and Fig. 6 shows a similar view with one of the sole-pieces removed to show an auxiliary sole-piece, while Fig. 8 is a front elevation. The presser-foot comprises a supporting-shank 13 on which approximately triangular supports 18, 19 are pivoted by screw pins 16, 17. Sole-pieces 21, 28 are pivotally mounted by set-screws 20, 27 on the supports 18, 19, and are cut away to receive the cutting-blade 7 and the ledger-blade 8 of the trimming-mechanism. The toe portions 23, 30 of the sole-pieces are spaced apart to receive between them upturned edges of the fabrics, and are shaped at the upper inner corners of the thickened extremities 26, 33 with concave, upwardly-inclined, convergent guiding-surfaces which lift and gradually straighten the fabric edges. An auxiliary sole-piece 47 is located directly behind the needle aperture and is formed with a pair of upstanding ears 48 pivoted to a lever 50, which is situated in a recess 51 in the shank 13 and is connected thereto by a pivot 52. A spring 54 presses the auxiliary sole-piece 47 into contact with the work. The triangular supports 18, 19 have slots 37, 38 embracing pins 39, 40 situated eccentrically at opposite ends of a barrel shaft 41 journaled in the shank 13. The shaft 41 is turned by a transverse pin 42 to rock the triangular supports 18, 19 into various positions of adjustment, and so alter the level of the attached sole-pieces to suit different thicknesses of fabric. Screws 45, 46 act as stops to the range of motion of the pin 42. If it is desired to full in the material on one side of the seam for example the single ply s<1>, Fig. 8, the sole-pieces are adjusted so that the sole-piece 21 presses the ply s' more firmly against the feed-dog than the adjacent plies s are pressed by the. sole-pieces 28. The feed-dog thus tends to slip relatively to the plies s<2> and fails to feed them as fast as the ply s'. The action may be augmented by the operator holding back slightly on the ply s<2> and permitting the free advance of the ply s'.
Patent GB-348461-A (GB)
Title: Improvements in or relating to means for generating short waves
IPC: H03B5/10
Filed: 1930-07-15
Abstract: 348,461. Valve generating circuits. ESAU, A., 1, Sophienstrasse, Jena, Germany. July 15, 1930, No. 21411. Convention date, July 25, 1929. [Class 40 (v).] In an arrangement for generating short waves, the cathodes of a plurality of thermionic valves, such as R1, R2, operating in pushpull, are connected in series through one or more tuned oscillatory circuits L1, C1 independent of and not inductively coupled to the main oscillatory circuit. The filament batteries H1, H2 are duplicated to obtain symmetry; alternatively a single battery may be connected between one filament lead and the mid-point of inductance L1, or two similar oscillatory circuits may be employed with a single battery, (Figs. 2 and 3, not shown). Several push-pull pairs of valves may be connected in parallel.
Patent GB-571119-A (GB)
Title: Improvements in and relating to high tension electric current transformers
IPC: H01F38/30
Filed: 1943-12-22
Abstract: 571,119. Transformers. ASEA ELECTRIC, Ltd. (Allmanna Svenska Elektriska Aktiebolaget.). Dec. 22, 1943, No. 21447. [Class 38 (ii)] A U-shaped primary winding for a current transformer consists of one or more insulated conductors 26, Fig. 4, surrounded by an inner tubular conductor or stress shield 27 and an outer U-shaped stress shield 29 with paper insulation between the central core and inner shield, and between the inner and outer shields. In a modification, Fig. 6, the inner stress shield is surrounded by alternate insulating and conductive layers (stress shields) which form steps along each leg. In a further modification, Fig. 7, additional conductive layers 34 are provided within the insulation at the coil ends. A transformer comprising a primary winding as described is enclosed in a casing comprising a lower tank 1 containing the core and winding 9, an intermediate conical insulator 2 and an upper container 3. Stress rings of semicircular section 19, 20 are arranged outside the conical insulator 2, and rings 23, 25 and shield 21 surround the upper ends of the primary coil ; the rings being in electrical contact with the outer stress shield 29 by means of clips 24, and the shield 21 in contact with the container 3 and terminal 12 by means of clip 22. The lower tank 1 may be filled with oil or an oil-sand mixture.
Patent GB-987821-A (GB)
Title: Improvements in and relating to a differential pressure indicator for pressurised blades of aircraft
IPC: B64C27/00
Filed: 1963-05-29
Abstract: 987,821. Indicating pressure loss in aircraft components. UNITED AIRCRAFT CORPORATION. May 29, 1963 [May 31, 1962], No. 21448/63. Heading B7W. In an aircraft having blades, such as helicopter rotor blades, including parts at pressure other than atmospheric pressure, an indicator is provided to detect inequality of pressure between two compartments of different blades at the same nominal pressure. Fig. 3 shows a three-bladed rotor, the main spar of each blade being sealed and subject internally to high or low pressure. Three indicators 100, each comprising two cups 102, 103, Fig. 4, clamping a deformable diaphragm 106, are connected by conduits 202, 204, to the blade spars through conduits 220 which are flexible to allow blade pitch change, flapping, and lag-lead movements. Should one spar leak, the diaphragms of the two adjacent indicators will deform so as to be visible from the ground through windows such as 103, Fig. 4. Each conduit 220 is attached to the spar by a coupling which may also be used for pressurizing or evacuating the spar. The connection between each indicator and its conduit 202 or 204 contains a filter and a restriction to block pressure surges from the diaphragm. Specification 733,026 is referred to.