baber/WOPTO huggingface dataset:
Patent GB-1405138-A (GB)
Title: Air filter testing
IPC: G01N15/06
Filed: 1972-08-29
Abstract: 1405138 Calibration of aerosol stream UNITED KINGDOM ATOMIC ENERGY AUTHORITY 17 Aug 1973 [29 Aug 1972] 40084/72 Heading G1B An aerosol salt stream in ducting 2 for use in testing air filters is calibrated using an aerosol sample dilution circuit comprising sampling duct 4 having inlet 5 and two outlets 6, 7, means 8 for controlling the ratio of flow-rates in the outlets, means 10 for measuring the rate of flow through one of the outlets, a duct 11 from this outlet extending into a closed (entrainment) vessel 12, the other outlet (6) being for flow to waste, a duct 13 extending into vessel 12 for conveying compressed air at controllable pressure and flow-rate into the vessel and a duct 17 extending into the vessel for discharging a mixture of aerosol and air from the vessel, the compressed air duct and the discharge duct having their axes aligned Fig. 2 (not shown), the compressed air duct having a restricted orifice to cause an increase in the velocity of the air issuing from the orifice and entrainment of the aerosol sample in the air-stream and the orifices of the discharge duct and the restricted orifices being spaced so apart that the discharge stream flows out of the vessel through the discharge duct without turbulence. The discharge duct orifice in the vessel may have an enlarged diameter. The dilution circuit may have a second sample entrainment vessel, 20, and a controlled flow of the discharge stream from vessel 12 is entrained in a second compressed air stream within vessel 20 for discharge by line 29.
Patent GB-962063-A (GB)
Title: M-type travelling wave electronic tubes
IPC: H01J25/42
Filed: 1962-10-24
Abstract: 962,063. Travelling wave tubes. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Oct. 24, 1962 [Oct. 24, 1961], No. 40233/62. Heading H1D. In an M-type travelling wave tube, coupling between a sole plate 2 and delay circuit 1 is progressively reduced in the vicinity of a point 3 where the delay circuit is coupled to an external circuit, to reduce the radiation of energy transferred to the fast mode from the slow mode in which the tube operates. As shown, the reduction is effected by a triangular plate 4, at delay circuit potential; the sides of the triangle may be curved, e.g. exponentially. In alternative arrangements, Figs. 3 . . . 5, not shown, the delay circuit comprises bars separated by baffles; in one case the bars are set progressively deeper between the baffles, in another the baffles increase in length towards the point 3, and in a final arrangement the baffles carry shields which partially screen the bars, the space between the shields getting progressively smaller towards point 3. The tube may be either an amplifier or an oscillator, and the invention may be applied to either or both ends of the delay circuit and also to bi-dimensional circuits.
Patent GB-1361733-A (GB)
Title: Derivatives of chloroamphenicol and thiamphenicol their production  and use
IPC: C07C233/18
Filed: 1972-08-31
Abstract: 1361733 Esters of chloramphenicol and thiamphenicol SUMITOMO CHEMICAL CO Ltd 31 Aug 1972 [17 Sept 1971] 40486/72 Heading C2C [Also in Division A5] Novel D-threo-compounds I in which R 1  and R 2  are an α-halo-C 1-8  alkyl group or an optionally substituted phenyl group but R 1  differs from R 2  and R 3  is nitro or methylsulphonyl are prepared by acylating D-threo-1- R 3  substituted phenyl-2-dichloroacetamidopropane-1,3-diol with a carboxylic acid R 1 COOH or its acid halide anhydride or mixed anhydride to form a novel ester which may be isolated followed by acylation with an acid R 2 COOH or one of the above defined derivatives. Chloramphenicol O<SP>3</SP>-3,5-dinitrobenzoate-O<SP>1</SP>-α-bromo-n-butyrate. Chloramphenicol-O<SP>3</SP>-α-bromo-n-butyrate- O<SP>1</SP>-3,5-dinitrobenzoate. Thiamphenicol-O<SP>3</SP>-α-bromo-n-butyrate-O<SP>1</SP>-3,5-dinitrobenzoate, Chloramphenicol O<SP>3</SP>-chloroacetate-O<SP>1</SP>-α-bromo-n-butyrate are prepared.  Compounds I exhibit anti-microbial activity and form with a carrier or diluent a pharmaceutical preparation which may be administered orally. The preparation may also contain chloramphenicol and/or thiamphenicol.
Patent GB-1525308-A (GB)
Title: Data storage apparatus
IPC: G11B25/04
Filed: 1976-09-30
Abstract: 1525308 Guiding flexible record discs INTER. NATIONAL BUSINESS MACHINES CORP 30 Sept 1976 40576/76 Heading G5R A flexible record disc 1 is supported during rotation by an air bearing over a backing plate 3 which is bent upwardly along at least one, but preferably two, chords 7, 8 on either side of the radial slot 4 through which the head 5 accesses the underside of the disc, in order to restrict disturbance of the air bearing in the region of the head 5. The chords may be parallel, asymmetric or symmetric, but preferably define a tapering central area narrower at the slot 4. The plate 2C may be mounted in a cartridge, Fig. 9 (not shown), in which case the uppermost plate tips are rounded downwardly to save height.
Patent GB-1170327-A (GB)
Title: Hydraulic Governor
IPC: G05D13/00
Filed: 1967-09-06
Abstract: 1,170,327. Change-speed control; valves. CATERPILLAR TRACTOR CO. 6 Sept., 1967 [20 Sept., 1966], No. 40655/67. Headings F2D and F2V. In a governor having three governor valves 28a, 28b, 28c, each providing a pressure signal responsive to the speed of rotation of a shaft 12 and suitable for controlling the ratios of a change-speed gear, each governor valve comprises a radially slidable valve spool having an annular groove 30 controlling communication between a pressure fluid inlet 50 and a governed pressure outlet 51 in response to centrifugal force and an opposing force applied by governor pressure acting in a recess 32 in the outer end of the valve spool, which end is closed by a radially fixed reaction plug 42. The governed pressure is fed from the grooves 30 to the recesses 32 through ducts 34. The weights of the three valve spools 28a, 28b, 28c are different and the effective areas of their recesses are different to provide different response characteristics for each valve. The weights of the valve spools may be adjusted by adding washers 46. The governed outlet pressure from each valve is fed through ducts 51, 55, 59, 61 to the governed apparatus. The inlet 50 may be supplied by an input and/or output driven pump. For a motor vehicle change-speed gear each output speed responsive governed pressure may initiate two ratio shifts. Fig. 4 (not shown) is a graph of governor pressure against speed.
Patent GB-1184690-A (GB)
Title: Apparatus for Manufacturing Surgical Swabs.
IPC: A61F13/38
Filed: 1967-09-06
Abstract: 1,184,690. Surgical swabs. DR. KARL HAHN K.G, 6 Sept., 1967 [6 Sept., 1966], No. 40779/67. Heading A5R. Apparatus for manufacturing surgical swabs consisting of a stick 18 with a fibrous tampon 50 at at least one end comprises (Figure 1) a rotating transport device 12 provided with pockets 16 in which the device receives the surgical sticks from a feeder 20, there being means 26 for rotating the sticks within the pockets, means 34 for supplying loose fibrous yarn, a tuft applying device 40 movable between a position for removing a tuft from the yarn supply and a position for applying the removed tuft to the end of a stick as it rotates in a transport device pocket, and a device for shaping the fibrous tufts at the ends of the sticks, the tuft applying device having two jaws and being arranged to open and close around a tuft, there being means provided for locking the jaws in the opened and in the closed positions. As shown, the sticks are moved in a rotating transport wheel 12 having pockets 16 from which the sticks project at each side of the wheel, the sticks being rotated in the pockets by a disc 26, features of the apparatus being duplicated (although not apparent from the drawings) so that a fibrous tuft of cotton or rayon is applied to each end of each stick. The fibrous yarn is moved from the supply tube 34 onto a supply guide 48 (Figure 2) by a periodically rotated knurled part 46 and is offered to the tuft applying device 40. The tuft applying device 40 comprises a base plate 70 which periodically moves vertically (from the position of Figure 9 to that of Figure 7, not shown) on columns 126 from the apparatus housing 10 so as to offer a tuft of fibrous yarn taken from the low positioned guide 48 to the higher positioned swab stick and the swab shaping device 52. Mounted on the base plate 70 are two jaws 72 which close under the action of a compression spring 86 and a peg and shaped slot arrangement 78, 76 to grip the tuft when the tuft applying device is adjacent the guide 48. The slots are said to be shaped so that the jaws are effectively locked respectively against an opening or a closing movement when in the fully closed or opened positions. The jaws are substantially opened by arm members 102 which are driven about a pivot (104) in the housing 10 when the tuft applying device is adjacent the shaping device 52 and act so as to move the pegs 78, there being a spring loaded locking device 96 which assists in retaining the jaws in the open position until such time as it is released by a peg (128) when the tuft applying device has redescended. The tufts are applied to the swab sticks (Figures 4-6, not shown) in the tuft shaping device 52 which is provided with a surface 62 suitable to give the tufts rotating on the sticks a 'drop' shape, the shaping device including a supply 54 of water or glue which is applied to the swab.
Patent GB-1479743-A (GB)
Title: Machine tools
IPC: B24B49/18
Filed: 1974-09-19
Abstract: 1479743 Automatic control of grinding YUTAKA SEIMITSU KOGYO Ltd and TOYOTA JIDOSHA KOGYO KK 19 Sept 1974 [19 Sept 1973(2)] 40789/74 Heading G3N [Also in Division B3]  A cutting feed starting position of a tool grinding is controlled to compensate for change in tool size due to grinding by providing a position reference member (3), Fig. 4 (not shown) which is moved along with the column 2 supporting the tool during the tool grinding operation, the reference position it provides thus being changed in correspondence with the change in tool size, keeping constant the relation between the reference position and the operational part of the tool, electromagnetic clutch 11 being actuated during tool grinding. During a cutting operation, column 2 alone is driven by a pulse motor and gear train rotating ball screw (13, Fig. 4), ball screw 10 being locked stationary when clutch 11 is de-energized to retain member (3) fixed in relation to bed 1. Specific relative positions of; column 2 relative to member (3); column 2 relative to bed 1; and member (3) relative to bed 1; are detected by magnetic switches CRP1, CRP2, CRP3 respectively, each comprising a sensor co-operating with a corresponding magnet member, the switches having a hysteresis characteristic, Fig. 2 (not shown) for backlash compensation, column 2 in retracting to a position defined by the position of member (3)  moving to a position defined by the signal (OFF1), thence reversing direction to the position corresponding to (ON2). When a tool is to be changed, column 2 and member (3) are retracted together until the latter reaches a specific position with respect to the bed, as detected by switch CRP3, see (C), (D), Fig. 5 (not shown), whence column 2 alone is driven to a position corresponding to the (OFF1) position of switch CRP1, and thence forward to the (ON2) position (E, F Fig. 5) whence column 2 and member (3) are driven forward together to a retract specific position (14A) defined by the output of switch CRP2. The current tool size data, represented by a corresponding position of member (3) is retained should there be a power failure, an initial position being set in accordance with initial tool size. Movements are under the control of a numerical control system, and relay-timing circuit, Fig. 8 (not shown).
Patent GB-1386055-A (GB)
Title: Floor-treating apparatus
IPC: A47L9/16
Filed: 1973-08-30
Abstract: 1386055 Suction cleaners ELECTROLUX AB 30 Aug 1973 [22 Sept 1972 27 April 1973] 40901/73 Heading A4F A suction cleaning apparatus for floors comprises a cyclone separator 16 through which dust-laden air or liquid is drawn into a container 11 by at least one motor-fan unit 15, the air outlet 20 of the separator communicating via a horizontal substantially flat circular filter 23 with the inlet of the/or each motor-fan unit 15, and the separator 16 and the unit or units 15 being disposed in the container 11 below the filter 23. In the embodiment illustrated in Fig.3 two motor-fan units are provided each cooled by a separate air-flow via channels 31, 32 Figs.4 and 5 (not shown). The filter 23 may be of glass fibres, and the air drawn therethrough by the units 15 is discharged via a sound absorber (37) through louvres 38. In another embodiment the outlet of the cyclone separator 16 extends as a viser conduit 64 Fig.6 (not shown) through an aperture (66) in the filter 23, and the air-flow paths through the units 15 are arranged differently. To facilitate emptying of the container 11 an angular projection 74 Fig. 10 (not shown) is provided thereon for engaging the edge of a toilet pan over which the apparatus can be tilted.
Patent GB-929316-A (GB)
Title: Apparatus for utilizing solar heat
IPC: F24S23/30
Filed: 1960-11-29
Abstract: 929,316. Apparatus for utilizing solar heat. A. KANTOROWITZ, and M. KANTOROWITZ. Oct. 17, 1961 [Nov. 29, 1960], No. 40944/60. Class 64 (2). Heat from the sun is concentrated by a lens I on to a heat absorbing unit II and a circulating fluid thereby heated in the unit flows to a boiler unit III which may have a burner for use in adverse weather conditions. The circulating fluid may comprise a gas circulating between the heat-absorbing unit II and the boiler unit III in which water is vaporized by the hot gas (Fig. 8, not shown). Alternatively the circulating fluid may comprise water which remains liquid under the prevailing pressure in the unit II, but can be withdrawn from the unit III as steam for a power unit such as a steam engine IV driving a rotary machine such as a fan V. The lens I may be fixed in which case it extends through 180 degrees, or it may (as shown) subtend a smaller angle and be movable in accordance with the relative motions of the sun and the earth. Movement may be effected by a clock motor by means of tapped-off steam in dependence upon the output from the heater unit. In a preferred form of heat-absorbing unit II a coil carrying the heat transfer fluid extends through a double walled semi-cylindrical shell, the outer wall of the shell being made of glass and the coil being painted with an absorbent paint. Fig. 8 shows one form of boiler unit III in which water in a chamber 18 is heated under pressure. A valve 12 releases the pressurized water which flows as steam to the power unit. The coil 17 receives its heat from the solar heat absorbing unit II which alternatively may communicate directly with the water space 18, the coil 17 then being omitted. A combustion unit 16 and flue tubes 15 are provided for use under adverse weather conditions.
Patent GB-890016-A (GB)
Title: Improvements in metallic brazing mixture
IPC: B23K35/30
Filed: 1958-12-19
Abstract: Brazing alloys for use in powdered brazing material comprise in percentages by weight:-  ..(a).(b).(c) .Nickel.70.89-95.balance .Chromium.17.-.19 .Silicon.4.3-5.10 .Cobalt.1 max.1 max.- .iron.4.-.5 max .carbon.0,95.0,5 max.0,25 max .boron.3,75.1,8-3,5.- .manganese.-.-.1 max Sheet material of the following alloy may be brazed:-  .carbon.0,1 .manganese.1,5 .silicon.0,05 .sulphur.0,02 .phosphorus.0,02 .chromium.20,0 .nickel.10,0 .iron.2,0 .tungsten.15,0 .cobalt.balance
Patent GB-1282107-A (GB)
Title: High-elongation-and-tenacity nylon tire yarn
IPC: D01F6/60
Filed: 1969-08-18
Abstract: 1282107 Nylon yarn MONSANTO CO 18 Aug 1969 [21 Aug 1968] 41182/69 Heading B5B [Also in Division D1] Continuous filament nylon yarn e.g. a 500 denier tyre cord, of high tenacity and elongation is produced by a process which comprises drawing the yarn to a tenacity of at least 8À5 grams per denier, subjecting the yarn to a temperature of 180-235 C. for a period of 0À003-0À15 seconds whilst at a reduced tension of 0À05-0À35 grams per denier, then collecting the yarn in orderly manner. The yarn retains a tenacity of at least 8À5 grams per denier and has an elongation (expressed as length by which yarn can be stretched before breakage divided by the original drawn length of the yarn) such that the product of tenacity and elongation is at least 1À65. As shown, undrawn yarn 20 is drawn and molecularly oriented by passage between nip rolls 28, around draw pins 30, across a fixed heater block 32 in a zone of high tension leading to draw and separator rolls 34 and 36. Yarn next contacts hot plate 24 while under reduced tension, passing over roll 38 and through a guide 40 to ring and traveller take-up mechanism 26 whereby it is wound on to bobbin 42. Mechanism 26 may be replaced by winding apparatus which does not impart twist and/or nip rollers or a driver roller may be inserted between mechanism 26 and plate 24 to isolate the latter from tension variations originating in the take-up mechanism.
Patent GB-412816-A (GB)
Abstract: 412,816. Synchronous movements. SIEMENS & HALSKE AKT.-GES., Siemensstadt, Berlin. Oct. 12, 1933, No. 28268. Convention date, July 11. [Class 40 (iii).] A received signal couples a copying-telegraph drum in correct phase relation to a drive which has been started by the same signal. A contact K on the armature of a receiving magnet is opened by the signal and interrupts the circuit of a time-lag relay A. If the received impulse is above a minimum length, a contact a1 opens and a2 closes. This excites a relay B to close the circuit of the driving motor at b2, and also energizes the winding Th of a thermal-delay switch. The switch opens its back contact thr so that a holding coil II in the relay B receives current. Afterwards the front contact tha closes the circuit of the relay A which opens the contact a2 to switch off the switch Th and the relay winding BI. The cooling switch Th opens the contact tha, but if signals are still being received, the contact K is opening, and the relay A again releases to energize the switch Th afresh. If, on the other hand, signals cease, the circuit of the relay A remains closed and the switch Th cools down so that the contact thr short circuits the holding coil BII to switch off the motor. After the starting of the motor by the beginning of the long starting signal described above, the coupling of the receiving- drum to the drive is effected by the closing of the contact K at the end of the starting signal. For this purpose a relay C is excited through the contact K, its own contact c2, and a contact b3 closed by the relay B. This closes a holding circuit and the circuit of a coupling magnet E.
Patent GB-952600-A (GB)
Title: Improvements in low pressure mercury vapour discharge lamps
IPC: H01J61/72
Filed: 1959-12-04
Abstract: 952,600. Discharge lamps. EGYESULT IZZOLAMPA ES VILLAMOSSAGI RESZVENYTARSASAG. Dec. 4, 1959 [Dec. 6, 1958], No. 41287/59. Heading H1D. A low pressure mercury vapour discharge lamp, Fig. 1, has a circular cylindrical tubular bulb 1 containing rare gas and mercury, the inner surface of which is coated with fluorescent material and having at each end an electrode 10, 11 supported by lead-in conductors extending out of the end of a substantially cylindrical glass stem 8, 9, the electrodes being arranged at such a distance F from each other that the energy consumption of the lamp, operating at its rated voltage, exceeds 40 or 45 milliwatts per sq. cm. of the external surface area of the bulb between the electrodes, and at least one of the electrodes being at a distance t from the adjacent sealed end of the bulb which is at least 1.5 or 1.8 times the external diameter D of the bulb, the arrangement being such that a substantially unobstructed inner cross-section is provided inside the bulb for the passage of mercury vapour from the space between the electrodes towards the sealed end of the bulb. The distance t may be 3D. The cylindrical parts of the stems 8, 9 can have an external diameter d less than half the external diameter D of the bulb, preferably about one-third of D. Specific dimensions and energy consumptions are stated. Reference is made to a cold spot having a temperature of about 38-42 C. The rare gas filling can be 80% by volume of neon and 20% of argon at a pressure of about 2 Torr. Shields 10a, 11a are provided on two sides of each electrode 10, 11, which can be of the oxide-coated coiled-coil tungsten wire type. The exhaust tube 15 extends into the stem 9. In the construction shown in Fig. 2 the electrode 11 is contained in a perforated sheet-metal shield 14. In the construction shown in Fig. 3 the electrode 16 is positioned inside a metallic tube 17 welded to electrode-supporting wire 18, the tube 17 not touching the electrode-supporting wire 19.
Patent GB-992373-A (GB)
Title: Process for the production of polyurethane foam materials
IPC: C08G18/65
Filed: 1963-10-22
Abstract: Amino ether alcohols of the formula <FORM:0992373/C2/1> or <FORM:0992373/C2/2> or <FORM:0992373/C2/3> where R represents a hydroxyalkyl group with at least 3 carbon atoms and R1 represents an alkylene group with at least 3 carbon atoms are prepared by reacting olefine oxides containing at least three carbon atoms with ammonia, monoalkanolamines, dialkanolamines or trialkanolamines the carbon chains of which comprise at least three carbon atoms, preferably in the presence of a basic or acid catalyst. In the examples, triisopropanolamine is reacted with propylene oxide and tri-(2-hydroxybutyl) amine is reacted with 1,2-butylene oxide in the presence of sodium metal in methanol as catalyst.ALSO:Polyurethane foam materials are produced by a process wherein polyisocyanates, water and/or other blowing agents are reacted with amino ether alcohols of the formula <FORM:0992373/C3/1> or <FORM:0992373/C3/2> or <FORM:0992373/C3/3> in which R represents a hydroxyalkyl group with at least 3 carbon atoms and R1 represents an alkylene group with at least 3 carbon atoms. The amino ether alcohols may be obtained by reacting olefine oxides with at least three carbon atoms, preferably propylene oxide or butylene oxide with mono-, di- or trialkanolamines, the carbon chains of which comprise at least three carbon atoms in the presence of a basic or acidic catalyst. Other polyhydroxylic compounds may be incorporated in the reaction mixture, e.g. polyesters, polyethers, polythioethers, polyacetals, adducts of alkylene oxides and polyamines and alkoxylated phosphoric acids. Other blowing agents are low-boiling halogenated, saturated and unsaturated hydrocarbons and azo compounds.  In the examples the preferred polyisocyanate is 4,41-diphenylmethane diisocyanate.