baber/WOPTO huggingface dataset:
Patent GB-567227-A (GB)
Title: Improvements in or relating to multiple contact electric switches
IPC: H01G2/00
Filed: 1940-01-26
Abstract: 567,227. Electric resistances. BROWNE, C. O., and BLUMLEIN, A. D. Jan. 26, 1940, No. 1584. [Class 37] [Also in Group XXXVII] In a device for effecting electrical connection to a series of tapping points on an impedance, main switch arms, such as 3, 4, 5 are adapted to move over series of main contacts 2 connected to tappings on an impedance 1 while simultaneously an auxiliary switch arm or arms 13, 14, 15 move over auxiliary contacts 11 connected to tappings on an auxiliary impedance 10. In the form shown, the main and auxiliary switch arms besides being mechanically connected, are electrically connected by the slip rings 6, 7, 8 and 16, 17, 18, and the arrangement is such that as the arms 3, 4, 5 move the distance from one tapping to the next the arms 13, 15 each move over ten contacts 11 causing half of the total auxiliary impedance 10 to be connected across the two adjacent tappings of the impedance 1 and the lead 20 to be in effect connected to varying points on this auxiliary impedance. Thus, the result is that each two adjacent tappings'of the impedance are subdivided into ten parts by means employing a comparatively small number of contacts. Further subdivision may be effected by adding further impedances between the tapping points on the auxiliary impedance and the auxiliary contacts and making the brushes 13, 14,-15 such that they can bridge two adjacent contacts. The impedances may take the form of resistances, chokes or condensers and the device may be applied to potentiometers to a time delay network, Fig. 2 (not shown) or to an attenuator.
Patent GB-1080611-A (GB)
Title: Hydraulic valve system for hydraulic actuators
IPC: F16K11/22
Filed: 1966-01-13
Abstract: 1,080,611. Hydraulic control system. WARNER & SWASEY CO. Jan. 13, 1966 [Jan. 21, 1965], No. 1644/66. Heading F1P. In a hydraulic system comprising a plurality of identical spool valves each controlling the supply and exhaust of hydraulic fluid to an associated actuator each valve has a housing 25 having along one side 25a thereof a number of ports 35b, 38b, 39b, 40b, 41b, 42b, 43b which communicate with ports and passageways provided in a passage plate 60 interchangeable with other passage plates having different passageways therein in order to provide different flow paths for fluid controlled by the valve for corresponding positions of the spool. Each spool valve is of conventional construction and has chambers 35-43 for interconnection by movement of the spool 26. The chambers 38, 39 are connected to the ends of the associated actuator while the chambers 36a, 37a are connected to the outlet of a pump or to the outlet from another valve. The passage plate may allow connection between one side of the actuator to the pump and the other side to exhaust. Alternatively the plate may cause the supply to the head end of an actuator to be supplemented by the fluid expelled from the rod end. In modifications of the plates the associated valve may be arranged to allow passage of fluid to another valve when in all, or some, of its positions. An auxiliary valve member (70), Fig. 11 (not shown) may be incorporated in a passage plate whereby the passageways therein may be altered by operation of the auxiliary valve.
Patent GB-275081-A (GB)
Title: Improvement in electric condensers with resistances
IPC: H01H9/02
Filed: 1927-01-20
Abstract: 275,081. Dubilier Condenser Co. (1925), Ltd., (Assignees of Dubilier, W.). Aug. 4, 1926, [Convention date]. Condensers, particularly for preventing or reducing sparking at the contacts of electric circuits to be broken. In one form, Fig. 1, the condenser 1, which may be of the flat sheet, or the wound, type, is enveloped by a coil 4 of resistance wire with an intervening sleeve 5, the whole being enclosed in a container 7. The condenser and resistance may be connected in series, as shown, or in shunt, and are connected across the contacts to be opened. In Fig. 3 the coil 4 is wound on a support 6 in a casing 7 through which project terminals 8, 9 and which may be wax-filled. In another form, the coil is disposed on a fibre plate and held against the side of the condenser by an adhesive or bands, and, if desired, by an outside wrapper.
Patent GB-416246-A (GB)
Title: Improvements in or relating to wireless navigation aiding systems
IPC: G01S1/02
Filed: 1934-01-17
Abstract: 416,246. Directive wireless signalling. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. Jan. 17, 1934, No. 1705. Convention date, Jan. 17, 1933. [Class 40 (v).] Instead of landing along a line of constant field strength, the pilot flies along a line representing a constant ratio of two signals. The two signals are received on two differentlytuned circuits coupled to a common amplifier, so that fluctuations in the voltage supply to the valves, or any other fortuitous factor tending to vary the sensitivity of the receiver, is automatically balanced out. The two transmitters are located at a common point C, Fig. 2, on the landing field, one aerial radiating a dish-shaped field S1, S2, S3, and the other a vertical field T1, T2, T3, the landing course being shown in dotted lines. The field S is produced by energizing one or more vertical or horizontal aerials so as to create a ground image of opposite phase, whilst the field T is produced by energizing the aerials at a frequency for which the conductivity of the earth is large in relation to the dielectric constant, so that an in-phase mirror image is formed. In the receiver, Fig. 4, the two input circuits 1, 2 are coupled to a common detector 3 and amplifiers 4, 5. The two different modulation notes are separated by filters 6, 7 and fed to detectors 8, 9. The voltage across a resistance 10 is fed back to keep the strength of one note constant, irrespective of changes in field strength, so that the direct-current ammeter 11 indicates the ratio of the two signals. By adjusting the degree of automatic volume control, the line of flight can be rounded off more favourably near the actual landing point. One of the transmitting aerials may also be used to radiate a direction-indicating signal of the swinging-beam type.
Patent GB-780182-A (GB)
Title: Steam trap
IPC: G05D23/08
Filed: 1953-01-21
Abstract: 780,182. Steam traps; temperature-responsive actuating-elements. MATTLER, H. SCHULTE -, and SCHMITZ, F. Jan. 21, 1953 [Jan. 21, 1952], No. 1803/53. Class 64(2) [Also in Group XXIX] In a steam trap having a condensate discharge opening with a closure member 5 fitting loosely so as to leave a small discharge passage 6 always open, the member 5 has flattened portions 10 to form a main discharge passage 11, which by rotation of the member, is varied in cross section' automatically according to the amount of condensate accumulated for discharge. The member 5 is rotated by a spiral bimetallic strip 12 the outer end of which can be inserted in any one of a number of radial grooves, Fig. 2 (not shown), in a ring 15, for pre-selection of the angular setting of the member. The inner end of the strip 12 is lodged in a slot 17 at the top of the member 5. The larger discharge passage 11 is at its maximum when the flats 10 coact with diametrically-opposed recesses 18 as shown in Figs. 3, 4. The recesses are formed in discs 7 which together with spacers 7<1> having similar openings, form the seat and discharge opening. A duct 3 leads from the trap inlet 2 to a chamber 4 containing the. bimetal 12 and this chamber communicates with an outlet 9 through the openings 6 or 11. A cover 19 of the trap is transparent.
Patent GB-367524-A (GB)
Title: Improvements in methods for the treatment of leucite and other alkali aluminium silicates with nitric acid
IPC: C01F7/24
Filed: 1931-01-20
Abstract: A process of leaching leucite and other alkali aluminium silicates with nitric acid on the counter current principle is characterized in that the siliceous residue impregnated with nitric acid is added during evaporation of the potassium nitrate solution obtained after separation of aluminium nitrate from the mixed solution by strongly acidifying with nitric acid.  The mass obtained on evaporation to dryness is dissolved in water, and iron-free potassium nitrate may be obtained from the solution thus produced.  The siliceous residue is stated to assist evaporation and to bind the iron oxide formed.
Patent GB-753608-A (GB)
Title: Improvements in or relating to percussion tool steels and method of manufacture thereof
Inventor: TAYLOR CECIL ARTHUR
IPC: E21B10/58
Filed: 1954-01-21
Abstract: 753,608. Percussive tools. RAWLPLUG CO., Ltd. Jan. 10. 1955 [Jan. 21, 1954], No. 1889/54. Class 124 A percussive drill steel comprises a metal body and a cutting insert and has the insert made in one piece with three radially extending arms, the insert being located in slots formed at the cutting end of the body which forms the apex of a three sided pyramid. As shown, the drill body 1 has grooves 2 and slots 3 formed at the cutting end. A cutting insert 5, e.g. of tungsten carbide. made in one piece and having three arms disposed at 120 degrees is fixed in the slots by brazing. The slots may be diametral and the unused portion 6 filled by brazing in metal parts 7. The drill may be sharpened by flat grinding of the adjacent faces of two arms at a time.
Patent GB-1518345-A (GB)
Title: Transfer printing web
IPC: B44C1/165
Filed: 1975-07-29
Abstract: 1518345 Transfer printing; registration SUBLISTATIC HOLDING SA 29 July 1975 [31 July 1974 (2)] 01900/78 Divided out of 1518343 Heading B6C Transfer webs having a width of 79 to 205 cms and which are particularly suited for the process described and claimed in Specification 1,518,343, Specification 1,518,344, carry registration means along one lateral edge, at equidistant spacings corresponding to the pattern design or repeat, providing for longitudinal alignment. The same or other means may provide for lateral adjustment. The means may be optically, or magnetically-detectable marks, or pneumatically-sensed perforations.
Patent GB-1505504-A (GB)
Title: Compression spring
IPC: F16F1/02
Filed: 1975-01-16
Abstract: 1505504 Power lift mechanisms DAVID BROWN TRACTORS Ltd 13 Jan 1976 [16 Jan 1975] 1951/75 Heading A1P [Also in Division F2]  A triple-rate signalling unit, Fig. 7, for a draft controlled power lift mechanism of a tractor as described in Specification 1291122, is provided with two compression spring units 30, 31 of different rate each formed by a stack of plates 10 located slideably and non- rotatably on a support and separated by diametrically disposed spacers 14 with adjacent spacers being at an angle to one another. Two spring units of the above described type may alternatively be used in a dual-rate signalling unit as disclosed in Specification 1141719 or a single such spring unit may be used in a single-rate signalling unit.
Patent GB-561491-A (GB)
Title: Improvements in or relating to methods of treating latex or in or relating to latex adhesives or in or relating to methods of forming bonds by the use of such adhesives
IPC: C08C1/00
Filed: 1942-02-18
Abstract: Adhesives are prepared by subjecting aqueous dispersions of natural or artificial rubber to oxidation in presence of a metallic catalyst such as a salt of copper, cobalt or manganese, and after the oxidation treating the latex so as to terminate or reduce the catalytic action of the metal salt by addition of either a condensation product of a polyamine and o-hydroxy-substituted aldehyde, e.g. disalicylalethylene diamine, as described in Specification 523,456, or dinitrosoresorcinol, or a condensation product obtained from acetylacetone and ethylene diamine or sodium p-(2-hydroxy-1-naphthylazo) benzene sulphonate. The oxidation may be effected by treatment with oxygen, air or other oxidizing agent. Specification 442,136 is also referred to.
Patent GB-499438-A (GB)
Title: Improvements in or relating to paper and other cellulosic materials of similar fibrous structure
IPC: D21H21/42
Filed: 1938-01-22
Abstract: 499,438. Security paper. BRITISH CELANESE, Ltd. Jan. 22, 1938, No. 2139. Convention date, Jan. 28, 1937. [Class 96] Identifiable decorative, wall, security, wrapping, tissue, or other paper, cardboard, felt, &c. is formed with the addition, e.g. to the paper pulp at the beater or Jordan, of loose fibres made of or containing an organic derivative of cellulose, e.g. cellulose acetate, formate, propionate, butyrate, or ethyl, methyl, or benzyl cellulose in amount, e.g. 1 to 4 per cent such that they can be removed without impairing the remaining material. They may be of more than one colour, pigmentation, denier, &c. and may be <1>/32 in. to 3 ins. long, of 0À3 to 20 denier and may include plasticizers, dyes, lakes, fillers, fire retardants, swelling agents, &c. As pigments may be used oxides of zinc, lead, iron, or titanium, &c., hydroxides, carbonates, phosphates, Prussian blue, &c. The fibres or the filaments from which they are cut or torn may be intermittently embossed, e.g. by heated rolls, or of varying denier along their length, partially or intermittently saponified, or curled or crimped. They may be applied as sliver, roving or lap broken down by water jets, beaters, air, &c. on reaching the pulp, or as a suspension in water together with 1 to 5 per cent of tapioca starch, dextrin, &c. The paper pulp may be mechanical wood &c., soda, sulphate, sulphite, cotton or linen rag, or masticated paper, &c. A design may be printed on the paper using dyes with differing affinity for the different fibres.
Patent GB-1366660-A (GB)
Title: Thermal prime mover
IPC: F22B27/12
Filed: 1971-06-14
Abstract: 1366660 Thermal power plant N LAING 14 June 1971 [15 June 1970 (2)] 02147/74 Divided out of 1366652 Heading F1Q In a thermal power plant of closed cycle type comprising a rotary evaporator heat exchanger 1 and associated heat source, an expansion engine 2 and a rotary condenser heat exchanger 3, means are provided whereby working fluid condensate and lubricating oil which escapes from regions of the prime mover requiring lubrication and accumulates within the condenser heat exchanger 3 can be supplied to containers (not shown) in the evaporator heat exchanger 1 in which containers the working fluid and lubricating oil are separated by distillation of the working fluid. The plant is similar to that described in the parent Specification 1366652 referred to. Specifications 1366653, 1366654,366655, 1366656 and 1366657 are also referred to.
Patent GB-704124-A (GB)
Title: Liquid cooling systems for internal combustion engines
IPC: F02F1/16
Filed: 1952-01-28
Abstract: 704,124. Cooling cylinders. SULZER FRERES SOC. ANON. Jan. 28. 1952 [Feb. 27. 1951], No. 2281/52. Class 7(2) In an engine liquid cooling-system in which a coolant is conducted through a cooling chamber 2, Fig. 1, surrounding a cylinder wall and wherein the chamber comprises a main cooling space 4 near the cylinder head and having means, such as pipes 10 and 15, for the supply and withdrawal of all the coolant for the chamber 2, there is provided an auxiliary cooling space 6 around the lower part of the cylinder liner that communicates with the space 4 only through an annular constricted aperture 7. Coolant enters the space 4 by means of a passage 11 and a conduit 12, Fig. 2, in the cooling jacket 8 and flows through a conduit 13, a passage 14 and the pipe 15, Fig. 1, into the cylinder head 17; the conduits 12 and 13 are formed in a fitting 9, Fig. 2, by a partition 19. In a modification, the inlet and outlet passages and conduits may be located at diametrically opposite points.
Patent GB-722720-A (GB)
Title: Improvements in pit props
IPC: E21D15/28
Filed: 1952-01-28
Abstract: 722,720. Pit props. GERLACH, H. Jan. 28 1952 [Feb. 17, 1951], No. 2311/52. Class 20 (2)' In a telescopic pit prop the inner prop part 1 is clamped on opposite sides by two horizontal wedges 4, 5 of different pitch, wedge 4 being of steeper pitch than wedge 5. The wedge 4 is driven in first. The wedges bear on the part 1 through inserts 6. In Fig. 3, the wedge 4 bears on an insert 9 by an inclined surface and the insert bears by an inclined surface on a movable cap 11 so that when the wedge 4 is driven in the insert 9 is forced down and against the part 1. The wedge 5 is of bridge-shaped cross-section so as to take the thrust opposite the wedge 4 and cap 11. In a further modification, Fig. 4 (not shown), the wedge 5 is also arranged similarly to wedge 4 in Fig. 3 and has extensions above and below the prop on which act horizontal wedges driven through apertures in the prop and adapted to raise the inner part 1 against the roof. In a further modification, Fig. 6 (not shown), the wedge 4 is above the wedge 5 on the same side of the prop. The inner prop may taper downwards.
Patent GB-415448-A (GB)
Title: Improvements in electric starting devices for internal combustion engines
Filed: 1933-01-25
Abstract: 415,448. Starting prime movers. ECLIPSE MACHINE CO., Elmira, New York, U.S.A. Jan. 25, 1933, No. 2402. Convention date, Jan. 26, 1932. [Class 38 (iv).] In an electric starting system for internalcombustion engines comprising an ignition switch 11 which also closes the circuit of a coil acting on a starting circuit switch 5, the circuit of coil 9 being broken at an inertia trembler switch 14, 15 by movement of an armature 21 responsive to starter current in a coil 6, to battery voltage on a coil 24 and to generator voltage on a coil 25, uniform operation of armature 21 is secured despite variations in the battery voltage by supplying the coil 24 through a barretter or iron-hydrogen resistance 31, which has a high positive temperature coefficient so that the current in the coil 24 is maintained at a predetermined constant valve despite variations in the voltage of the battery.
Patent GB-1465742-A (GB)
Title: Optical method of recording on a disc-shaped record carrier body
IPC: G11B7/24
Filed: 1974-02-09
Abstract: 1465742 Automatic position control PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 9 Feb 1974 [9 Feb 1973] 02442/74 Heading G3R [Also in Division G5] A method of writing optically on a disc 1 with an optically readable follow-on track of at least one revolution comprises supplying a write beam 20, modulating it, scanning it over the disc to write thereon an information track and maintaining the write beam registered with respect to the follow-on track or track already written. The read beam may be radially displaced from the write beam by the follow-on track pitch and track the already written track after the follow-on track, which may contain data, which may be a test pattern. Sources 5 and 10, or a single laser and beam splitter and polarizer,  supply write and read beams 20 and 30 respectively. A reflecting disc 1 is rotated on shaft 2 by motor 3 movable radially by slide 4. An information signal is applied to terminals 7, 7' of electro-optical modulator 6 so that a radiation spot focussed by lens 15 affects the sensitive layer on disc 1. After semi-transparent mirror 9, phase grating 11 forms zero-order beam a and first and second order beams b and c from beams 20 and 30. Beam a is a read or write beam according to which aperture 16 or 8 is closed. The radiation spots of beams b and c, of power too low to write, are on the edges of followon and information tracks during writing and reading respectively. Reflected beams go via rotatable mirror 14 and semi-transparent mirror 13 to high frequency detector 17, which gives a signal proportional to the written information, and to detectors 18 and 19 whose difference signal indicates the beam positions and gives electronically a control signal to correct them by rotating mirror 14. The beam positions may be determined solely by read beams b and c, the write beam producing only a beam a and the read beam a being suppressed. The difference in output of two detectors may indicate the position of the disc surface relative to the plane of focussing of the read or write beams.
Patent GB-1481294-A (GB)
Title: Process of preparing calcium secondary phosphate anhydrid
IPC: C01B25/32
Filed: 1976-01-22
Abstract: 1481294 Ca HPO 4  CENTRAL GLASS CO Ltd 22 Jan 1976 [29 Jan 1975] 2460/76 Heading ClA [Also in Division F4] Calcium secondary phosphate anhydride is obtained from the dihydrate CaHPO 4 ,2H 2 O prepared by the reaction of NaNH 4 HPO 4  with CaCl 2  in an aqueous solution at or just above room temperature, the molar ratio of Ca : P being in the range from 1À05 to 1À20; an aqueous slurry of the dihydrate in a concentration of from 5 to 20% by weight is then prepared, the pH adjusted when necessary to a value in the range from 4À5 to 5À5 by adding a mineral acid and dehydration of the dihydrate is then achieved by heating the slurry rapidly to a temperature of from 85 to 97 C, finally the heated slurry is allowed to cool and the product precipitates. The slurry may be heated by causing it to flow over the apex of a conical member and over the convex conical surface to the base of the cone near which a plurality of nozzles blow steam tangentially to the cone's cross section.
Patent GB-620873-A (GB)
Title: Improvements in or relating to a method of reducing the thickness of thin magnesium and magnesium base alloy sheets
IPC: B21B3/00
Filed: 1947-01-28
Abstract: 620,873. Rolling. BURGESS BATTERY CO. Jan. 28, 1947, No. 2670. Convention date, March 15, 1946. [Class 83 (iv)] Working at specified temperatures.-In a method of reducing thin sheets of magnesium or magnesium base alloys, the material 10 is heated by the heater 14 to a temperature of from 500‹ to 600‹ F. for a time ending not more than half a second prior to reaching the rolls 15. The invention is particularly applicable to material of an initial thickness of 0.002 inches to 0.01 inches. The rolls 15 are themselves heated to a temperature of 200‹ to 300‹ F., and a heater 17 on the exit side of the rolls reheats the material to a temperature of 435‹ to 600‹ F. to permit annealing and the levelling of irregularities under tensioning by a driven reel 20. The time factor may vary but preferably the maximum time of heating for each portion of the strip, from entry into the heater 14 to exit from the heater 17, should not exceed 5 seconds, and each portion of the strip is at a temperature of 435‹ to 600‹ F. for not more than 3 seconds before making contact with the reducing rolls. In a modification continuous mills have heaters interposed between successive sets of rolls. Electric resistance or induction heating may be used.