baber/WOPTO huggingface dataset:
Patent GB-1165001-A (GB)
Title: Optical Projection Apparatus.
IPC: G03B21/10
Filed: 1965-10-28
Abstract: 1,165,001. Projection and viewing apparatus. E.A. LLOYD and B.E. LLOYD [trading as LLOYD PRODUCTIONS]. Oct.14, 1966 [Oct. 28, 1965], No.28566/65. Addition to 946,416. HeadingG2J. A slide projector is housed in base 1 whose lid 20 hinges back to permit the erection of a viewing screen 5 on pivoting, collapsible struts 6, 8 and 12, the mirror 4 directing the projection beam on to the screen, and all parts of the base being spaced from the plane defined by the screen. Plate 17 keeps stray light from the screen and may replace struts 6 when clip 7 permits its disengagement from strut 8 when the screen is to be folded into the base 1. Direct projection on an external screen through an opening in the base is possible when mirror 4 is removed or hinged back, the position of lens 3 then being re-adjusted. In an embodiment, locating clips accurately position member 12 on erection of the screen.
Patent GB-895290-A (GB)
Title: A new or improved method and apparatus for drying electrical installations
IPC: A47K10/06
Filed: 1959-08-20
Abstract: 895,290. Electric heating. BAHUS, G. Aug. 20, 1959, No. 28569/59. Class 39(3) A method of drying the insulation on conductors in electrical installations and apparatus which has become damp comprises applying a voltage sufficient to overload the conductors currentwise with a conductive member in series providing a thermal image of the conductors, and measuring the temperature of the member in order to regulate the supply to prevent overheating. The conductive member 8 has its temperature measured by a thermometer 9, the conductor current being regulated by a tapped transformer 4-6, and a resistor 3 in series with an ammeter 13. A thermostat 10 disconnects the supply 1 if an excessive temperature is reached. An ohm meter 15 measures the insulation resistance of the conductors.
Patent GB-247327-A (GB)
Title: Improvements in and relating to the construction of floors and ceilings and the like
IPC: E04B5/19
Filed: 1924-11-29
Abstract: 247,327. Roberts, E. W. Nov. 29, 1924. Flooring and ceiling slabs.-Floors and ceilings are formed by casting concrete on to inverted trough-shaped units a supported by substantially flat sheets b, the said trough units a being provided with outwardly turned edges a<1>, which serve, in conjunction with upturned flanges d on the flat sheets, to position the flat sheets. Adjacent sheets b are formed with overlapping portions d' having cut-away parts for holding adjacent sheets against relative longitudinal displacement. Adjacent sheets may be connected by means of short rods passing through holes in the upturned flanges d, such rods being adapted to support the reinforcing rods of the floor. Each flat sheet may be adapted to support a number of trough units, in which case the latter may be screwed to the flat sheets. The flat sheets and trough units may be of fibro-cement.
Patent GB-896066-A (GB)
Title: Improvements in insulating oils
IPC: H01B3/22
Filed: 1960-08-18
Abstract: An insulating oil comprises a substantially saturated hydrocarbon oil containing a minor amount of a ring-substituted aromatic hydrocarbon of the formula <FORM:0896066/III/1> where A is an aromatic nucleus, R1, R2 and R3 are alkyl, cycloalkyl or aryl radicals and n is an integer from 1 to 6, whereby the gassing and power factor characteristics of the oil are improved.  Suitable additives include tert-butyl benzene, tert-amyl benzene, tert-butyl biphenyl, 2,2-diphenyl propane, 1,4-di(tert-butyl)benzene, b -tert-butyl naphthalene, 1-tert-butyl anthracene, 9-tert-butyl anthracene, hexaphenylethane, 1,1,1-triphenylethane, b -(triphenylmethyl)naphthalene, 9-triphenylmethyl-anthracene, and 1-phenyl-1,1-di(cyclohexyl)ethane.  The compound may form from 0,5 to 30% by weight of the oil, which may be used for cables, transformers, capacitors, circuit-breakers, and bushings.
Patent GB-842722-A (GB)
Title: Improvements relating to centrifugal compressors
IPC: F04D17/14
Filed: 1956-09-19
Abstract: 842,722. Centrifugal compressors. GUTEHOFFNUNGSHUTTE STERKRADE A.G. Sept. 19, 1956 [Sept. 19, 1955], No. 28717/56. Class 110 (1).  In a multi-stage centrifugal compressor in which the stages can be connected all in series or in two groups in parallel with one another, an additional compressor is connected to the main compressor or a part of it when the groups of stages are operated in parallel. In the compressor shown, six impellers 22-27 operate in series during normal operation, valve 36 being open and valves 37, 38 being closed. At part load, valve 36 is closed and valves 37, 38 are opened and an additional two-stage compressor 33 is brought into operation. The plant then comprises two groups operating in parallel, one group comprising impellers 22, 23, 24, 25 in series and the other group comprising the compressor 33 and the impellers 26, 27 in series. Intercoolers, such as 31, may be provided. The impeller 25 may face in the opposite direction to assist in balancing end thrust. The main compressor may have an odd number of stages, in which case the additional compressor may have a single stage. In an alternative arrangement, a six-stage compressor is divided into two parallelconnected groups, each of three stages, during part-load operation, and the additional compressor is connected in series with both groups.
Patent GB-707783-A (GB)
Title: Improvements in or relating to process for purifying n-dimethyl-acetamide
Inventor: LARSON ROBERT JOHN
Filed: 1951-12-07
Abstract: N-Dimethylacetamide containing dimethylamine as impurity is purified by distilling the crude amide, condensing the vapour of dimethyl acetamide to form liquid amide having a temperature above 90 DEG  C., separating the uncondensed dimethylamine and then further cooling the dimethyl acetamide out of contact with the dimethylamine.  Almost complete separation is effected at about the boiling temperature of the amide at ordinary pressure.  The crude amide may be prepared by reacting acetic acid or acetic anhydride with dimethylamine in a liquid body of dimethylacetamide and acetic acid in which the content of acetic acid is less than that of the dimethyl acetamide/acetic acid azeotrope, distilling off a mixture more enriched in dimethyl acetamide than the azeotrope and refluxing and condensing to obtain relatively pure dimethyl acetamide containing, say, 0.02 to 0.05 per cent dimethylamine; on purifying this crude amide as above, the dimethylamine content is reduced to not more than 0.001 per cent, and the purified amide may then be used to form solutions of resins without causing gelling.  Suitable apparatus is described for the purification.
Patent GB-1014688-A (GB)
Title: Improvements in tipping trucks
IPC: B61D9/02
Filed: 1963-07-19
Abstract: 1,014,688. Tip-wagons. ROBERT HUDSON & SONS (PROPRIETARY) Ltd. July 19, 1963 [July 19, 1962], No. 28748/63. Heading B7L. In a tip-wagon having a chassis 12, Figs. 1 and 2 and a body 28 tippable to the side of thg chassis by centrally disposed toothed sectors 24, 26 between body portions 30, 32, the tipping movement is initiated and thereafter damped by a dashpot having a cylinder. 14 pivoted at 16 to arms 10 rigid with the chassis and a piston 18 pivoted at 20 to a bar 22 joining the sectors 24, 26. The dashpot is fluid-pressureoperated and serves as the motive power means for the body for tipping and return movements and also to damp the return movement. The dashpot may be provided at one end of the body or there may be a dashpot at each end. Moreover, two dashpots may be provided, one on each side of the body.
Patent GB-1118744-A (GB)
Title: Preparation of hydrazine hydrate
Inventor: KOHNEN HEINRICH
IPC: C01B21/16
Filed: 1965-07-07
Abstract: Hydrazine hydrate is produced by fractionating an aqueous ketazine and/or hydrazone soln. (derived from hydrazine and an aliphatic ketone having 4-8 carbon atoms) under an excess pressure of 1-50 atms., and at a sump temp. of 100-250 DEG  C., removing the ketone from the top of the column and the hydrazine hydrate as an aqueous soln. from the sump. The aliphatic ketone may be methyl ethyl ketone, methyl isopropyl ketone, methyl isobutyl ketone, methyl n-butyl ketone, 4-methyl pentanone-2 or ethyl amyl ketone.  The aqketazine and/or hydrazone may be decomposed in the presence of 5-25% aliphatic ketone and 2-10% hydrazine hydrate.ALSO:An aliphatic ketone of 4-8 C atoms is produced by fractionating an aqueous ketazine and/or hydrazone soln. (derived from hydrazine and an aliphatic ketone having 4-8 carbon atoms) under an excess pressure of 1-50 atms., and at a sump temp. of 100-250 DEG  C., removing the ketone from the top of the column and the hydrazine hydrate as an aqueous soln. from the sump.  The aliphatic ketone may be methyl ethyl ketone, methyl isopropyl ketone, methyl isobutyl ketone, methyl n-butyl ketone, 4-methyl pentanone-2 or ethyl amyl ketone. The aq. ketazine and/or hydrazone may be decomposed in the presence of 5-25% aliphatic ketone and 2-10% hydrazine hydrate.
Patent GB-632460-A (GB)
Title: Electric connector devices of the plug and socket type
IPC: H01R13/71
Filed: 1947-10-29
Abstract: 632,460. Two-part couplings combined with switches ; current and voltages measuring. WEBER, H. Oct. 29, 1947, No. 28864. Convention date, Oct. 30, 1946. [Classes 37 and 38 (i)] [Also in Group XXXVII] A combined plug-and-socket coupling and switch comprises a plug 1 provided with a projection 5 having contacts 7 on its nose 6 and being received in an aperture 18 in the socket 14, which has resiliently-mounted contacts 30 for engaging the contacts 7 when the plug is pivoted about journals 12 in bearings on the socket. The contacts 30 are mounted on arms 23 pivoting at 25 against springs 24 and having insulating heads 29 which engage behind the nose 6 on the projection. When the contacts have been made, an indicating surface 11 on the plug is exposed. In a modification, the plug is integral with an instrument (Fig. 14, not shown), whereupon the nose has sloping sides so that the contacts 30 can easily force the contacts 7 away therefrom.
Patent GB-631918-A (GB)
Title: Improvements in and relating to the attachment of skins of aircraft and other structures
IPC: B64C1/00
Filed: 1947-10-29
Abstract: 631,918. Bolted joints. ENGLISH ELECTRIC CO., Ltd., HOLLOCK, R. N., and BRADFORD, F. Oct. 29, 1947, No. 28865. [Class 83 (iv)] [Also in Groups XXXII and XXXIII] The skin of an aircraft or other light-weight structure is secured to a stringer attached to a rib by a member which enables the stringer to be adjusted about two independent axes, the attachment member being capable of longitudinal axial adjustment. The invention is shown applied to an aircraft structure, in which the skin 1 is riveted to a stringer 3, the end of which is secured by a pin or bolt to an eyebolt 8 engaging by means of a screw-thread with a bracket 7 secured to a rib 4. The angular setting of the stringer in relation to the rib is adjustable by rotation of the eyebolt 8 in the bracket 7 and by rotation of the stringer about the pin or bolt by which it is attached to the eyebolt. The attachment may also be used for securing the skins of boats or vehicle bodies.
Patent GB-1014646-A (GB)
Title: Time division multiplex transmission system
IPC: H04J3/20
Filed: 1962-07-27
Abstract: 1,014,646. Automatic exchange systems. GENERAL DYNAMICS CORPORATION. July 27, 1962 [Aug. 16, 1961], No. 28952/62. Heading H4K. In a time division multiplex system in which communication is effected over a common highway by using the energy transfer technique and wherein each subscriber's line circuit is connectible to the input and to the output of the highway by means of selectively operable gate circuits, all the subscribers have access to all the other subscribers, irrespective of their grouping, only via the highway, a transfer inductance or bilateral amplifier common to all the subscribers being included in the highway. The line circuits are divided into N groups of M lines. Each line circuit has associated therewith a calling and a called line gate, the calling line gates in each group being multiplied to a group output gate, e.g. 31, and the called line gates being multiplied to a group input gate, e.g. 33. All gates such as 31 are multiplied to the input of a common transmission highway 21 and similarly gates such as 33 are multiplied to the output of the highway. During a call between subscribers in different groups, e.g. subscriber 22 to subscriber 23, a calling line gate 21, output gate 31, input gate 33 and a called line gate 28 are pulsed during the particular time slot allotted to the call and energy transfer between capacitors 24 and 26 via the inductor or amplifier in highway 21 takes place. For a call between subscribers in the same group, viz. subscriber 22 to subscriber 38, it is still necessary for signals to pass over highway 21, i.e. gates 27, 31, highway 21 and gates 41, 39. The system is thus symmetrical about the highway thereby ensuring that all calls therein are subjected to the same attenuation or amplification.
Patent GB-447400-A (GB)
Title: Improvements connected with live-steam feed-water heaters and boiler circulators
IPC: F22D1/28
Filed: 1934-10-10
Abstract: 447,400. Heating feedwater. SHELDRICK, W. A., 12, Church Road, Canton, Cardiff. Oct. 10, 1934, No. 28953. [Class 64 (i)] [See also Group XXVIII] In a direct contact feedwater heater mounted in the steam space of a boiler, an annular water inlet nozzle 2 is detachably secured above a flared open-top chamber 3 carrying a converging outlet piece 10, to which is attached a pipe depending into the boiler water space. The annular stream of water from the nozzle is directed. by a conical baffle 13 over an annular serrated ring 16 held on a ledge in the chamber 5 by bolts 4. A conical deflector 14 guides the heated water into the outlet.
Patent GB-716015-A (GB)
Title: Process for detecting impurities in inert gases
IPC: G01N27/12
Filed: 1952-11-17
Abstract: Apparatus for determining the presence of certain impurities in a gas mixture comprises an electrolytic rectifier having an electrolyte affected by the impurities when the gas mixture is drawn through it, the resultant fall in the back resistance being indicative of the extent of the impurities.  As shown (Fig. 2) an electrolytic rectifier comprising iron or aluminium screens 5, 6 separated by glass wool 9 saturated with 20 per cent. alkali solution or <PICT:0716015/III/1> 2 per cent. sodium bicarbonate solution respectively, is assembled in a glass test tube 4 which plugs into a box 1 to connect the screens 5, 6 in series with a battery 15 and neon voltage indicator 16 or a milliammeter.  The gas mixture is drawn through the rectifier by a pump 11 and the impurities degrade the electrolyte so that a back current flows whose magnitude is indicative of the extent of the impurities.  The voltage applied by the battery 15 is adjustable by a switch 17, to determine the presence of different groups of impurities.  The metal of the cell may alternatively be thallium and the electrolyte may be sodium borate or a citrate or sulphate solution.
Patent GB-319699-A (GB)
Title: Feeding-device for the paper strip of adding machines and cash registers
IPC: G06C11/12
Filed: 1929-09-25
Abstract: 319,699. Knotz, A. Sept. 26, 1928, [Convention date]. Web - feeding arrangements; line - spacing mechanism.-In cash registers and like machines, line-spacing mehchanism for a web comprises a rack connected to a rocking support for the impression roller and co-operating in one direction with a toothed wheel on a web-feeding roller. In the mechanism shown in Fig. 1, a support 8 for an impression roller 9 is secured to the pivot 7 of a pinion 6 which is geared to a pinion 4 actuated by a hand-lever 2. A feed roller 24 engaging a pressure roller 26 is provided with a toothed wheel 46 co-operating with a rack 48 which is pivoted at 47 to the support 8 and is held in engagement with the rack by a spring-urged lever 51. The feed roller is provided also with a toothed wheel 45 co-operating with a detent 54 on a lever 53. The web 58 passes between the rollers 24, 25, through a guide 57, between the type-wheels 10 and an ink ribbon 61, and under a knife 63. When the hand-lever is pulled forwards, the support 8 is moved forwards, and the rack is moved idly over the toothed wheel 46, the pressure roller preventing movement of the feed roller, and the lever 53 dropping to release the detent 54. On return of the hand-lever, the rack co-operates with the toothed wheel 46 and the web is fed out of the machine, the feed movement being terminated by the detent 54 when the rack engages the tail 55 of the lever 53. The feed and pressure rollers are mounted in a bracket 21, the shaft of the pressure roller being mounted in pivoted arms 27 and guided by slots 25. Springs 37 connect the arms 27 to pivoted arms 33 engaging adjusting- screws 35. The pressure roller can be released by raising- a finger-lever 43 which is connected to discs 39 having pins 41 engaging the arms 27. The support 8 may carry a winding-roller 12 for a record web 13, the impression roller being connected by a band 18 to the winding-roller and being provided with a ratchet-wheel 17. which co-operates with a pawl 14 pivoted on the framework 1. During forward movement of the impression roller, the pawl moves idly over the ratchet-wheel, and on the return movement the pawl turns the ratchet-wheel and the record web is line-spaced.
Patent GB-1432489-A (GB)
Title: Process for producing phenolic fibres
IPC: C08G14/06
Filed: 1973-06-19
Abstract: 1432489 Phenolic resin filaments NIPPON KYNOL Inc 19 June 1973 [19 June 1972 7 Sept 1972 19 Dec 1972 24 Feb 1973] 29067/73 Heading B5B Phenolic resin filaments having improved heat resistance are made by melt-spinning or jet-spinning a fibre-forming phenolic resin and curing the resulting filaments, the phenolic resin being treated before, during or after the curing treatment with at least one compound of the formula where Y stands for an oxygen atom, a sulphur atom or -NH group; and R 1 , R 2 , R 3  and R 4 , which are the same or different, represent a hydrogen atom, C 1 -C 4  hydroxyalkyl group or C 2 -C 8  alkoxyalkyl group; or R 1  and R 3  together form a-C 1 -C 4  alkylene group. Such compounds include urea, thiourea, a mono- or dimethylol derivative of urea or thiourea, or a mono- or di-methyl or ethyl ether of urea or thiourea. In a preferred method, a phenolic resin containing 0À2 to 30% by weight of the aforesaid compound is melt-spun and the filaments cured. Filaments of an uncured phenolic resin containing units derived from a halogenated phenol, the halogenated phenol being used in an amount of at least 3% by weight, based on the total weight of phenols used in preparing the phenolic resin, may be cured in the presence of urea, thiourea, guanidine, ethyleneurea or ethylene-thiourea or a methylol derivative of any of these compounds. Alternatively, melt-spun uncured phenolic filaments may be immersed in an aqueous solution containing an acid catalyst and an aldehyde, the filaments heat-treated to cure them to a curing degree of 0À1 to 3%, and then immersed in an organic solvent or water-organic solvent solution containing at least 0À2 to 35% by weight of the aforesaid compound, and the filaments then heat-treated at 20‹ to 120‹ C. Specified solvents include methanol, ethanol, isopropanol, acetone, methyl ethyl ketone, dioxane, tetrahydrofuran, dimethyl formamide, dimethyl sulphoxide, dimethyl acetamide, benzene, toluene or xylene. Alternatively, the phenolic resin may be meltspun, cured to a curing degree of 5 to 20% to form non-flammable and anti-fusing phenolic filaments, and the cured filaments treated at 20‹ to 120‹ C. in an aqueous solution, organic solvent solution or water-organic solvent solution containing 0À5 to 30% by weight of the aforesaid compound. Filaments so made have a heat resistance degree of not more than 0À5 and contain in their fibrous structure 0À5 to 25% by weight of a linkage in which Y<SP>1</SP> is an oxygen or sulphur atom.
Patent GB-447401-A (GB)
Title: Detector arrangement for television reception
IPC: H01F19/04
Filed: 1934-10-11
Abstract: 447,401. Valve circuits for wireless reception. RADIOAKT.-GES. D. S. LOEWE., 10, Wiesenweg, Steglitz, Berlin. Oct. 11, 1934, No. 29093. Convention date, Oct. 11, 1933. Addition to 435,417 and 441,285. [Class 40 (v)] In a push - pull detector for television described in Specification 441,285 in which loss of high - frequencies is avoided, the effective input capacity is reduced by applying the carrier frequency directly to the grids of a double grid detector valve, the usual grid condensers being omitted. The grid resistance described in Specification 441,285 is so proportioned as to avoid loss of high frequencies. The Figure shows an arrangement in which the grid coil 23 is tuned with the inherent capacities to the highest side-band frequency of the image and damped by resistances 24, 25. The valve grids 17, 18 are preferably lead out laterally and arranged side by side symmetrically to the common anode to reduce the input capacity. The grids may be at zero or slight positive bias. The inputs to the two grids may be equalized by a balancing condenser 28, 29 or by the use of a screen 30. The condenser rotor may be connected to the screen or to the centre of the grid coil. Alternatively, the screen may be spacially adjustable to balance the inputs and may comprise in this case a short ring or instead the balance may be obtained by axial adjustment of the primary relatively to the secondary coil.
Patent GB-1105794-A (GB)
Title: A vibrating wire apparatus with phase resonance indication
IPC: G01L1/10
Filed: 1966-06-29
Abstract: 1,105,794. Measuring strain electrically. VYSKUMNY USTAV AUTOMATISACNICH PROSTREDKU. June 29, 1966 [July 10, 1965 (2)], No. 29194/66. Heading G1N. Apparatus for determining the strain in a wire 21 by measuring its natural frequency of vibration using coils 22, 23 and an amplifier 24, comprises a comparison wire 11 whose strain is adjusted by a lever 14 until it vibrates at the same frequency. A signal from the test wire 21 is fed to the exciting coil 12 for wire 11 to force it to vibrate at the same frequency. A pick-off signal from wire 11 is obtained by coil 13, and the phase of the signals in coils 12, 13 compared at 35. If they do not coincide a switch 37 allows motor 4 to increase the strain in wire 11 by rotating a micrometer screw 15. When they do coincide, indicating that the natural frequency of vibration of wire 11 is the same as the forcing frequency obtained from the test wire 21, the motor 4 is disconnected from screw 15, the angular rotation, which is recorded at 6, being indicative of the strain in wires 11 and 21.
Patent GB-740595-A (GB)
Title: Improvements in or relating to the production of thermoplastic materials and benzyl hydrocarbons
IPC: C08H8/00
Filed: 1953-10-22
Abstract: A thermoplastic mass is obtained by heating a benzyl ether of a ligneous substance at a temperature between 115 and 346 DEG C. in the presence of an alkali.  Benzyl hydrocarbons formed during the reaction may be distilled off whilst the reaction is in progress. Thus sawdust or other ligneous substance is benzylated with benzyl chloride and alkali, excess alkali and benzyl chloride removed by steam treatment although some alkali is left as catalyst and the mass is pressed and gradually heated in a vessel provided with a distillation column starting at 150 DEG C. and continuing to act in excess of 346 DEG  C.  If the distillation is stopped at or below 250 DEG C. the residual hydrocarbons act as plasticizers for the mass. Advantageously highly superheated steam may be used for the distillation.  The products may be pressed and crushed to provide the finished thermoplastic.