baber/WOPTO huggingface dataset:
Patent GB-968232-A (GB)
Title: Improvements in or relating to current stabilisers
Inventor: CHAPPELL FRANK ARTHUR
IPC: G05F3/04
Filed: 1962-01-24
Abstract: 968, 232. Automatic regulation. L. OERTLING Ltd. Jan. 15, 1963 [Jan. 24, 1962], No. 2673/62. Heading G3X. In an arrangement for stabilising the current through a coil T, e.g. the taring coil of a dispensing balance, the coil is connected in the diagonal of a resistance bridge which is connected across a voltage source V and which comprises resistors R, R and S, S connected as shown. The values of R and S at 0‹C, and their temperature coefficients, are so chosen with respect to the value of T at 0‹C and its temperature coefficient that, within limits, any change in temperature produces a variation in the ratio between the resistance values of R and S to produce a corresponding variation in the voltage across coil T, thereby to inhibit any variation in the current flowing through the coiL
Patent GB-809719-A (GB)
Title: Improvements in or relating to ticket issuing apparatus
IPC: G01G23/42
Filed: 1957-01-25
Abstract: 809,719. Ticket-issuing machines. HOBART MANUFACTURING CO. Jan. 25, 1957 [Jan. 25, 1956], No. 2771/57. Class 106 (3). An apparatus for computing the value of articles as they are weighed and for issuing printed tickets identifying the weight, unit price and value of each article, includes means for preventing delivery of a succeeding ticket until the ticket previously delivered to a delivery station has been withdrawn therefrom. In Fig. 5, power driven rollers 44, 45 advance a printed ticket 25, face downwards, such that its leading edge engages and slides upwardly along a guide surface 66 until the trailing end of the ticket is free of the feed rolls. The upward movement of the ticket then stops and it slides back and down a shoot 60 in a manner turning the ticket over to a face-up position. The bottom edge of the ticket comes to rest against a stop 70, Fig. 4, and the ticket remains at this delivery station until a lever 75 is pushed back by an operator, such movement of the lever 75 causing the stop 70 to retract and permit the ticket to slide down the rest of the shoot 60. A motor 50, coupled to the rollers 44, 45 is included in a circuit designed to provide cyclic operation of the motor, and this circuit includes a switch 80 which requires operation after one cycle has been completed before a second cycle can be started. On depressing the lever 75, to release a ticket 25 on the stop 70, a finger 85 actuates the switch 80 to permit a further ticket to be printed when desired. In a modified construction, Fig. 8, for use with tickets having a heat activatable adhesive coating on their backs, a printed ticket is advanced, face downwards, by power operated rollers 44 45, and the ejected ticket slides down a shoot 170 to a position over a heated plate 155. The ticket is held in this position by the inner end of a handle 165 comparable in function to the stop 70. An operator then presses a package against the handle 165 to depress it against a spring 167 until the package engages and adheres to the tacky surface of the ticket. A switch 80 serving the same function as the previous switch is actuated when the handle 165 is depressed. If the package contains frozen foods, for example, it may be necessary to hold the package and the ticket on the heater for a substantial interval, and to prevent a further ticket from being delivered during this time the electrical circuit is wired such that the motor 50 is freed on the release and not the depression of the handle 165. Specifications 406,654, 406,676, 773,395, [Group XXXV], 803,413 and 808,235 are referred to.
Patent GB-1020161-A (GB)
Title: Double mechanical seal for centrifugal pump
Inventor: THOMAS DAVID FRASER
IPC: F04D29/12
Filed: 1963-01-22
Abstract: 1,020,161. Mechanical seals. WATEROUS CO. Jan. 22, 1963, No. 2793/63. Heading F2B. The impeller shaft 33 of a centri. fugal pump is sealed by mechanical seals 74 and 75 comprising a pair of non-rotatable sealing rings 84 urged into facial sealing contact with the opposed faces of a sealing ring 71 mounted on the shaft for rotation therewith, the ends of the rings 84 facing the ring 71 being exposed to the fluid pressure in a lubricant reservoir 49 whilst the other ends are exposed respectively to atmospheric pressure and to the variable pressure in a chamber 70 in the impeller housing. The rings 84 are slidably sealed in the seal housing 53 by 0-rings 87 and are urged towards the ring 71 by springs 96 located in cages 76 having axial ridges 82 which engage notches in the inner surfaces of rings 84. Projections 93 on the cages 76 engage apertures 92 and 94 in an end plate 89 and in an end wall of the housing 53 respectively. The chamber 46 is open to atmosphere through an aperture 44 and the chamber 70 communicates with the suction chamber through one or more openings 69 in the impeller. The reservoir 49 is filled with lubricant which, during operation, lubricates and cools the seals. If pressure build-up occurs in the reservoir 49 it is relieved by the ring 84 of seal 74 lifting from the ring 71.
Patent GB-306263-A (GB)
Title: Improvements in and relating to sound reproducing and receiving instruments
IPC: H04R7/12
Filed: 1928-01-28
Abstract: 306,263. Mackintosh, E. V., and French, C. Jan. 28, 1928. Loud-speakers; diaphragms; magnetic instruments, - Acoustic apparatus, such as a loudspeaker, comprises a plurality of diaphragms having their bases adjacent to one another and each separately stiffened by reason of its conical, pyramidal or like shape, means for driving or to be driven by the diaphragms, and connecting means radiating substantially from a point and subjected mainly to longitudinal stresses during vibration for connecting the diaphragms with the driving or driven means. Fig. 1 shows a coustruction employing a number of conical diaphragms 1, 1<1> connected by rods 2 to a member 3 which is connected to a driving unit, e.g. of the reed type. The connecting means 2 may be light wooden rods or tensioned wires. The edges of the large diaphragms 1 are joined together at 4 and to the small diaphragm. 1<1> at 5. In the modification, Fig. 3, the diaphragms 1 are all of the same size and have the shape of hexagonal pyramids. The adjacent edges of the diaphragms are united so that they constitute a single sound producing surface with no air spaces between them. Fig. 5 shows a further modification employing conical diaphragms 1, all of the same size. The space 6 between and around the diaphragms is filled in with thin light material, such as paper to form a single sound producing surface. In all constructions, the outer edges of the diaphragms may be mounted in a rigid frame, preferably by means of a flexible connection. Instead of the diaphragms being united, they may be separately mounted, e.g. each diaphragm may be more or less flexibly connected to a rigid frame.
Patent GB-774229-A (GB)
Title: Improvements in or relating to electromagnetically operated switch devices
IPC: H01H83/08
Filed: 1955-01-31
Abstract: 774,229. Converting. SIEMENS-SCHUCKERTWERKE AKT.-GES. Jan. 31, 1955 [Jan. 30, 1954], No. 2898/55. Class 38 (2). [Also in Group XXXVII] An electromagnetically operated switch in series with a switching choke 25 in a converting system comprises a first holding magnet 1 with an armature and associated contact bridge 15, the magnet 1 carrying two windings. The first winding 9 through which flows part at least of the main current is so arranged that as the current decreases the effect of the magnet in holding the armature against a spring is reduced. The second winding 5 is energized from a winding 27 on the switching choke by the voltage developed during the opening current step to weaken the holding effect still further until the armature is released and moved by the spring to open the switch. The switch can thus be arranged to open in the current step, both when this is long and the voltage developed in choke winding 27 is small and when it is short and the voltage developed is larger. The armature 15 is held in the open position by a second holding magnet 16 incorporating a permanent magnet 21 until the supply voltage rises in the forward direction when current flowing through winding 18 diverts the holding flux from permanent magnet 21 through shunt 20. The armature 15 then moving under spring force approaches the first holding magnet 1, a movement which is assisted by the effect of winding 10 on shunt 7 in series with winding 18. This diverts some of the flux of permanent magnet 12 away from shunt 7 to polepieces 3. When main contacts 28 are bridged the rising load current passes through winding 9 also on shunt 7 which it saturates to divert the flux of magnet 12 wholly to the polepieces to retain the armature in the closed position during forward current flow. In one modification shunt 7 is undivided, the windings surrounding it completely, Fig. 2 (not shown). In another modification shunt 7 is replaced by a movable shunt to allow adjustment of the opening current and the windings are no longer on the shunt but on the limbs between the poles and the permanent magnet. Also the winding 5 may be connected to winding 27 through the main contacts 28. The permanent magnets may be replaced by electromagnets. Two switches 15, 151 according to the invention may be connected in parallel, one designed for carrying the main current and the other for opening and closing small currents, Fig. 4. Windings 191, 101 of switch 15<SP>1</SP> are connected in series with the main contacts of switch 15 which opens after and closes before switch 15<SP>1</SP> which carries the main current. Windings 5, 5<SP>1</SP> are connected in series to a winding 27 on the single switch choke 25. The holding flux may, if desired, be derived entirely from the main current.
Patent GB-733880-A (GB)
Title: Improvements in or relating to the manufacture of phosphoric acid
IPC: C01B25/232
Filed: 1953-02-02
Abstract: In the process of manufacturing phosphoric acid by treating dry, e.g. not more than 2 per cent moisture, pulverulent phosphate rock with at least 98 per cent sulphuric acid, heat curing the acidulated material to complete acidulation and remove volatile constituents, and leaching the cured material as described in the parent Specification, the sulphuric acid is added to, and substantially instantaneously mixed with, the phosphate by a shearing or cutting action with a minimum of kneading, and the resulting mixture is cured between 390 DEG  and 465 DEG  F. for from 20 to 90 minutes, if the curing is under quiescent conditions, or from more than 30 to 90 minutes for turbulent conditions, to form a stable, dry, acidulated material having superior leaching characteristics.  The curing time bears an inverse relationship to the curing temperature.  A slight excess of sulphuric acid over that necessary to react with all reactable compounds in the rock, say to give 1 per cent H2SO4 in the leached phosphoric acid should be used.  The acid may be preheated to 200-400 DEG  F., although examples also refer to 95-100 DEG  F. and 180-200 DEG  F., and the mixing may be effected in a pug mill, when the majority of the fluorine in the rock is liberated and may be recovered.  The curing may be carried out under quiescent condition by placing the mixture in trays in a stationary drier, or under turbulent conditions by passing the mixture into a directly or indirectly heated rotary drier.
Patent GB-1199905-A (GB)
Title: Method and Apparatus for Applying a Coating of Metal on Metallic Strip
IPC: C23C24/00
Filed: 1969-01-17
Abstract: 1,199,905. Electrostatically coating metal strip. JOHN SUMMERS & SONS Ltd. (National Steel Corp.) Jan. 17, 1969, No. 2904/69. Headings C7D and C7F. A metal strip 12 is electrostatically coated with a metal powder such as Al, Cd, Cr, Co, Cu, Pb, Ni, Pt, Ti, Sn, Ta, W, V, Zr, Zn, stainless steel, brass, bronze or "MONEL" (Trade Mark) by applying an aerosol of the metal powder and a gas such as air or an inert gas in a coating zone 14 via nozzles 65 and 66, ionizing the gas by means of a high potential source 61 and conducting wires 36 and 37 as a result of which the metal powder is attracted to the strip 12 which is electrically grounded at 62, heating the coated strip at 15 and then rolling the strip to a 1-4% reduction in rolls 95, 96. The strip 12 is first wetted with water containing “ - 2 gms/ 1 of a wetting agent such as sodium alkylarylsulphonate or polyoxyalkyl phenol which is applied to both sides of the strip from container 85 via jets 88 and 89. The charging wires 36, 37 are spaced along both sides of the strip and supported by a carrier 35 which may be oscillated or moved transversely of the strip. Any loose powder is removed from the strip as it passes conduits 75 and (76) which are attached to a vacuum source, the powder being collected at 77 and recirculated to the powder source applicators 70 and 71 for reapplying to the strip via nozzles 65 and 66. A gas curtain is applied at the exit of the coating zone via conduit 81 and pipes 78, 79 and the continuously moving coated strip is heated at 15 to a temperature at least high enough to dry the coating and then rolled at 16 where brushes 97, 98 clean the roll surfaces. The coated strip may be further heat treated. In further embodiments more than one coating zone may be present either in the same chamber Fig. 8 (not shown) or in separate chambers Fig. 7 (not shown). The following alloy powders may also be applied: 70% Cr - 30% Fe; 70% Zn - 30% Fe; 10-70% Mn Remainder Al. The powder applied should have a particle size of 15-80 microns.
Patent GB-444841-A (GB)
Title: Improvements relating to rotary spherical valves
IPC: F16K5/20
Filed: 1935-01-29
Abstract: 444,841. Rotary spherical valves. BOVING & CO., Ltd., and DARLING, W., 56, Kingsway, London. Jan. 29, 1935, No. 2908. [Class 135] A rotary spherical valve is rendered fluidtight in the closed position by an inflatable hose pipe interposed between the casing and valve member and around the passage through the valve. In the form shown, the hose is held by a plate k in a groove surrounding an obturating surface a<1> on the valve member, but it may be mounted in the casing. Two hoses may be provided to effect closures at both the inlet and outlet ports. The hose is connected by a passage m to a chamber in one of the valve trunnions in turn connected through a control valve p to a source of fluid pressure as for example the upstream side of the valve.
Patent GB-577886-A (GB)
Title: Improvements in or relating to telephone systems
IPC: H04M1/18
Filed: 1945-02-06
Abstract: 577,886. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., and PREIST, T. P. Feb. 6, 1945, No. 2956. [Class 40 (iv)] In a repeater for coupling a. " safe " telephone system (e.g. in a fiery mine) to an automatic exchange, incoming ringing current is converted into a reversed battery signal for operation of the calling indicator, thereby obviating ringing difficulties encountered in the use of the coupling described in Specification 546,600 in which transmitted ringing current, unless peaky in character, was enfeebled to an undesirable degree. The polarity of the rectifier MRE of the safe switching unit is such that battery from relay A of the coupling unit fails to drop the indicator 1. Incoming ringing along wires 16, 17 from the automatic exchange operates R to apply reversed battery from resistances YC, YD (terminals 10, 11 and 13, 14 being strapped) to drop the indicator I. Speaking key KS on being operated extends the speaking wires, and also causes the loop from retard RR to operate A and B to extend the loop from retard S back during a non-ringing interval (when R will be back) to trip the ringing. To dial out, key KS is thrown and A and B operate to send forward a loop as before. Off-normal springs ONS short-circuit the retard RR and impulses from springs IMP are repeated by relay A to an impedance free outgoing loop, C having operated on the first impulse to short out retard S. Non-linear resistances NLR1 and NLR2 are inserted for protective purposes. The switching unit could be replaced by a telephone with a similar circuit, I being a relay completing a suitable bell circuit. If the incoming ringing current has a suitable wave form so that reversed battery signalling can be dispensed with, straps from terminals 11 and 14 are connected to the alternative terminals 12 and 15.
Patent GB-229475-A (GB)
Title: Improvements in or relating to propellors for alrcraft
IPC: B64C11/04
Filed: 1924-02-05
Abstract: 229,475. Fairey Aviation Co., Ltd., Tips, E. O., and Smith, H. T. W. Feb. 5, 1924. Securing propellers on shaft.-An aircraft propeller provided with a streamline cowl or " spinner " is secured on its shaft by a nut or flanged plug, which is locked by means capable of being freed by a tool passed through a small hole in the spinner and is shaped for engagement with a boxspanner &c. passed through the same hole. The propeller boss e is held against a conical shoulder j on a castellated hollow shaft f by a conical ring p and flanged right-handed nut n. The nose x of a spring- pressed detent pivoted at v in an extension u of the nut n passes through a slot y and engages serrations t on a left-handed lock nut s screwed into the boss e. The hexagonal exterior of the extension u can be engaged by a hollow boxspanner (not shown) passed through the small aperture b in the spinner a, a key being passed through the spanner to act on the end z of the detent. In a modification, an hexagonal-bored member 12 with square-bored extension 13 is secured, as by a screw 11, to the part u, and the detent has an extension 16 formed with a bevelled end 18. A square-ended tool 15 with a hexagon head 20 and rounded or bevelled edge 19 can then perform both the unlocking and unscrewing functions. A tubular starting-claw 21 may be secured to the flange d of the propeller boss e.
Patent GB-1213722-A (GB)
Title: Oil burner with rotating distributor head
IPC: F23D11/08
Filed: 1968-01-19
Abstract: 1,213,722. Oil burners. DANFOSS A.S. 19 Jan., 1968 [20 Jan., 1967], No. 3005/68. Heading F4T. An oil burner comprises a rotatable inverted conical distributer head 11 driven by a motor 9 and supplied with fuel from a reservoir 17 up a tube 10 to the inner surface thereof, the oil being thrown off either edges 23 of slits 15 or off top edge 14, there being attached to the outer surface of the cone blades 13 projecting above edge 14, which blades draw air up through aperture 20 and serve to mix it with the fuel, and there being further provided an apertured cylinder 21 above the head 11 which recirculates combustion gases 26. The burner is located in a boiler 1 partially closed at its lower end by a frusto-conical base 6 defining aperture 20. An igniter 8 is provided. In modifications the blades can either be formed by cut-outs from the top part of the head bent out of the surface of the cone, or by cut-outs from a horizontal flange attached to edge 14. In a further modification an annular blade system.is attached by a few supports to the top edge of the cone.
Patent GB-966448-A (GB)
Title: Improvements in and relating to oscillator circuits
IPC: H03B5/10
Filed: 1963-01-24
Abstract: 966,448. Valve oscillating circuits. BLAUPUNKT-WERKE G.m.b.H. Jan. 24, 1963 [Jan. 25, 1962], No. 3037/63. Heading H3F. An oscillator comprises a thermionic valve with a capacitance 4 between grid and cathode, capacitance 2 and resistance 3 in series between cathode and earth, and an inductor 5 connected between grid and earth. The D.C. cathode current is carried by an R.F. choke or a resistor (not shown). It is shown in the Specification that the frequency of oscillation is determined by the value of the resistance 3, which may comprise a variable tuning resistor. The capacitance 2 and resistance 3 may alternatively be connected in parallel (Fig. 2, not shown) while the inductor 5 may be replaced by a piezo-electric crystal (Fig. 3, not shown). In a circuit of the latter type in which a tuned output circuit comprising inductance 6<SP>111</SP>, Fig. 4, and capacitance 7<SP>111</SP> is connected in the anode circuit of the valve, " pulling " of the frequency of oscillation when the anode circuit tuning is altered, due to feedback over the anode to grid capacity is prevented by means of a neutralizing circuit comprising coupling winding 13 and neutralizing capacitor 12.
Patent GB-173702-A (GB)
Title: Improvements in or relating to brooms and the like
IPC: A46B3/04
Filed: 1921-01-25
Abstract: 173,702. Barton, J., and Comber, S. Jan. 25, 1921. Brush stocks.-The stock of a sweeping-broom is made in one piece and of trapezoidal form, as shown. The stock is bored so that the bristles, fibres, &c., project beyond the edges thereof, to facilitate sweeping in corners. Reference has been directed by the Comptroller to Specification 12532/13.
Patent GB-1160053-A (GB)
Title: Transformer Assembly
Inventor: SOLMOS GENE ROBERT
IPC: H01F21/02
Filed: 1968-01-19
Abstract: 1,160,053. Transformers. RADIO CORPORATION OF AMERICA. 19 Jan., 1968 [19 Jan., 1967], No. 3053/68. Heading H1T. The two coils 43, 44 of a transformer are wound on separate tubular members 11, 17 of resilient material, e.g. polypropelene and the inner of these members 11, is arranged to telescope within the outer member 17, a wedgeshaped projection 30 on the inner member, which projects into window 22 in the outer member, restricting the relative axial and rotational movement of the two members. Fig. 3 is a section taken immediately below projection 30. The portion 31 of the inner member just below the projection 30 is of reduced thickness and channels 32, 33 extend on either side of this portion and of the projection, thus enabling the latter to flex inwardly during the initial assembly of the two members. Axially-extending ridges 38 on the inner members run in corresponding depressions 39 in the outer member, permitting free axial motion but enabling the two members to be temporarily locked together by rotating one with respect to the other so that the ridges and depressions no longer coincide. The projection and ridges 38 may alternatively be on the outer member, with the window and the depressions on the inner member. Further ridges 35 on the inner surfaces of the members grip self-tapping threaded tuning slugs. The coils are wound in moulded spiral grooves (18, Fig. 1, not shown) and moulded projections (19) hold the coil ends, which are connected to terminals 13-16 on base 12. The transformer is enclosed in shield can 41 through which the upper part projects, and portion 20 of the outer member is roughened so that it can be gripped easily during adjustment of its position. The two members may be permanently interlocked by inserting adhesive or bonding material into a small aperture (21) in the outer member, or by passing the tip of a hot soldering iron through both the members.
Patent GB-1088104-A (GB)
Title: Improvements in and relating to adhesive compositions
Inventor: JOHNSTON FRANK ROY
IPC: C08G59/72
Filed: 1964-01-24
Abstract: An adhesive composition comprises a mixture of an epoxide resin and a hardening agent therefor being a complex of boron trifluoride with a cyclic ether having a six-membered cyclic grouping containing at least two ether linkages. Dioxane and trioxane are the preferred ethers. Suitable epoxide resins are those based on bisphenol A and epichlorhydrin, phenolic compounds and formaldehyde, or poly(alkylene oxide) resins.  The composition may also contain a modifying agent, e.g. a weakly basic organic amine, a plasticizer, e.g. a chlorinated styrene/butadiene rubber or polypropylene glycol and a filler, e.g. aluminium powder.