baber/WOPTO huggingface dataset:
Patent GB-1084398-A (GB)
Title: A process of preparing thioepichlorohydrin
IPC: C07D331/02
Filed: 1965-11-02
Abstract: Thioepichlorohydrin is prepared by contacting 2,3-dichloropropylmercaptan with a base in the liquid phase at a temperature of 10-100 DEG  C., the base being a substance, including a Lewis base, whose aqueous solution has a pH higher than 7. 2,3-Dichloropropylmercaptan is prepared by contacting 2,3-dichloropropene with hydrogen sulphide in the liquid phase at a temperature of 30-120 DEG  C. in the presence of an azobis(cyanoalkane) or (cyanocycloalkane).  2,3-Dichloropropene may be purified by refluxing in the presence of a ,a 1-azobis(isobutyronitrile) followed by recovery of the dichloroprepene by fractional distillation.  The thioepichlorohydrin may be reacted with water to form a hydroxy-thiol, with hydrogen sulphide to form a dithiol, and with trialkylamines to give thioglycidyl trialkylammonium chlorides.  In comparative experiments: (a) irradiation of a mixture of 2,3-dichloropropene and hydrogen sulphide with ultra-violet light produced no observable reaction; (b) a similar experiment using impure 2,3-dichloropropene produced a small yield of 2,3-dichloropropyl mercaptan; (c) a similar experiment using allyl chloride in place of the 2,3-dichloropropene gave 3-chloropropyl mercaptan.
Patent GB-1024212-A (GB)
Title: Process and composition of matter for producing phosphate coatings on metal parts
IPC: C23C22/13
Filed: 1962-12-07
Abstract: Ferrous or zinc surfaces are phosphated by treating at 20-45  DEG C. with a solution containing in proportion by weight of Po4 to Zn to No3 of 1:(0.8-1.7):(1.5-3.2) and also alkali metal ions and nitrite ions, the solution having a total acid point number of 8 to 14 (PH 3.5-4.1) and the formation of free acid is suppressed by maintaining a nitrite content of 0.1 to 1 gm/litre. The solution may also contain alkaline earth metal ions, 0.2 to 2 g/litre of citric acid and/or 0.04 to 0/4 g/litre of tartaric acid or a citrate or tartrate, and a weakly foaming emulsifier such as a hydroxyethylated tall oil fatty acid.  The solution may be replenished with the same composition or a composition in solid or concentrated aqueous form and containing by weight 15-40% Po4, 9-36% Zn, 12-55% No3, 4-20% alkali metal (Na) and 2-10% No2. The solution may be used to spray the cleaned metal surface to facilitate cold working, and the steps of cleaning, spraying, drying, and working may form a continuous process.  The maximum free acid content of the solution should correspond to 0.3 points or 0.4 points when citric or tartaric acid is present.  The phosphated surfaces may be rinsed in chromic acid.
Patent GB-1354020-A (GB)
Title: Method of removing heat generated in  the polymerization of monomers in the gas phase
IPC: C08F2/00
Filed: 1971-10-07
Abstract: 1354020 Polymerization BADISCHE ANILIN- & SODA-FABRIK AG 7 Oct 1971 [9 Oct 1970] 46671/71 Heading C3P Heat is removed from polymerization reactions of monomers in the gaseous phase by a process in which gaseous or liquid monomer and optionally heat transfer agent is introduced into the polymerization zone and polymer is removed -therefrom and gaseous monomer, optionally together with heat-transfer agent, is removed from the polymerization zone, at least partially liquefied by cooling under the pressure prevailing in the polymerization zone and reintroduced in the liquid state into the polymerization zone, the polymerization temperature being kept constant by regulating the rate of reintroduction of the condensate which is stored as necessary after condensation and before reintroduction. The process may be applied to the polymerization of C 2 -C 6  olefins in the prescence of titanium halide/aluminium alkyl catalysts and vinyl chloride in the presence of peroxides or azo compounds. Apparatus suitable for carrying out the process of the invention is described and illustrated and examples describe the polymerization of (1 and 3) propylene in the presence of titanium trichloride/triethyl aluminium and (2) vinyl chloride in the presence of acetyl sulphonyl cyclohexane peroxide and triethanolamine.
Patent GB-1355273-A (GB)
Title: Rotary machine with axially fixed rotor
IPC: F01C21/10
Filed: 1972-10-10
Abstract: 1355273 Rotary positive-displacement machines ATLAS COPCO AB 10 Oct 1972 [14 Oct 1971] 46711/72 Heading F1F [Also in Division F2]  Roller bearings 21, 22, 23 and 24, 25, 26 support stub shafts 17, 18 of the rotor 16 of a positive-displacement vane-type machine, the inner races 23, 26 being a tight sliding fit on the stub shafts and the outer races 22 being axially held in end plates 12, 13, there being belleville springs acting between a shoulder 27 on shaft 17 and the inner race 23 so as to urge rotor 16 towards plate 12, whilst such movement of the rotor towards the plate is prevented by the abutment of an adjustable element 30 against the outer side of inner race 26, axial adjustment of element 30 serving to locate rotor 16 at a fixed axial position in housing 11. Element 30 is a washer whose axial movement is effected by a screw 31. Shoulder 27 is formed by a split snap ring on shaft 17. The screw 31 can be treated by anaerobic plastics glue so that after the required position is attained, the plastics glue will harden to permanently hold the rotor in position.
Patent GB-1062856-A (GB)
Title: Laser system
IPC: H01S3/105
Filed: 1965-11-04
Abstract: 1,062,856. Lasers. INTERNATIONAL BUSINESS MACHINES CORPORATION. Nov. 4, 1965 [Dec. 18, 1964], No. 46721/65. Addition to 1,055,840. Heading H1C. The radiation emitted by a laser active element serving as a lens is focused at a point on each of the two cavity reflectors, the position of the points of focus and therefore the direction of the axis along which stimulated emission takes place being determined by the adjustable position of the centre of curvature of one or both reflectors. Spherical reflectors 4, 6 may be used each having a different radius of curvature C4, C6, Fig. 1 (not shown), one radius of curvature C4 being centered in the active element 2 which serves as a thin lens. Alternatively one or both reflectors may be a combination, Fig. 4, of a plano-convex lens 12 and a plane mirror 10 which together correspond to a spherical reflector. The axis of emission must pass through both centres of curvature, so that if one of the spherical reflectors is tilted its centre of curvature is displaced and the direction of light emission is changed. By controlled tilting of both reflectors in respective orthogonal planes a two-dimensional raster may be scanned. In the embodiment shown the reflection system is fixed and the equivalent of tilting is obtained by applying a potential to an electro-optic or magneto-optic deflector in the light path. As shown a deflector comprises a pair of BaTiO 3  prisms 14, the degree of equivalent tilting being determined by the potential of a control signal source 16. Scanning may be effected in a single plane by modulating the control signal. The active medium may be doped ruby or uranium-doped calcium fluoride.
Patent GB-1377689-A (GB)
Title: Pipe expansion joint
IPC: F16L51/03
Filed: 1972-10-11
Abstract: 1377689 Pipe couplings BBC BROWN BOVERI & CO Ltd 11 Oct 1972 [13 Oct 1971] 46848/72 Heading F2G To maintain the mean separation between the ends of pipe sections 4, 5 in an expansion joint, constant, tie-rods are arranged peripherally in a neutral surface, so as to flex, as bellows 10 accommodates the relative angular displacement of the sections 4, 5. The tie-rods may be welded, screwed or bayonet jointed to fixing plates 14, which are welded in recesses formed in the ends of the pipe sections. A number of joints may be arranged in a pipe system (Fig. 1, not shown) to take up thermal expansion.
Patent GB-1388667-A (GB)
Title: Optical relay
IPC: H04N3/14
Filed: 1972-10-12
Abstract: 1388667 Modulating light PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 12 Oct 1972 [15 Oct 1971] 47109/72 Addition to 1356596 Heading H4F An optic relay comprises a support plate 1, conductive layer 2, aluminium layer 4 and a variably birefringent electro-optic plate 5, all transparent to read-out (visible) light from a source 7, a mutli-layer dielectric mirror 6 for reflecting the read-out light, and a photoconductive layer for receiving image light 10 (and preferably insensitive to the read-out light) whereby the local potential difference applied across plate 5, by conductor 2 and a further conductive layer 9 transparent to the light 10, varies according to the local intensity of the image light 10, and is characterized in that the photoconductive layer 8 is of selenium, or a compound of arsenic and selenium, or of arsenic and tellurium, in an amorphous or very slightly crystallized form, such having a high transverse resistivity to prevent image degradation. Layer 8 is preferably deposited by flash evaporation and layer 9, which is of a noble metal such as silver, gold or platinum, or of a semiconductor such as In 2 O 3  or SnO 2  is deposited by cathodic sputtering. In both deposition steps, the temperature of the substrate must be kept below 80‹ C. or 145‹ C. when layer 5 is respectively formed of Se or the binary compounds, to prevent reaction between mirror 6 and layer 8. The layer of mirror adjacent layer 8 is of LiF, CaF 2 , ZnS, MgO, Ta 2 O 5 , Al 2 O 3  or TiO 2 . Plate 5 may be of KD*P and maintained close to its Curie temperature. The thermal expansion coefficeints of plate 5 and layer 8 are then sufficiently matched to prevent undesired mechanical stresses. Layer 9 is 100-200Š thick and forms a rectifying contact with layer 8.
Patent GB-1128057-A (GB)
Title: Transistor amplifiers
Inventor: TALBERT DAVID GODWIN
IPC: H03F3/30
Filed: 1965-11-08
Abstract: 1,128,057. Transistor push-pull amplifiers. ULTRA ELECTRONICS Ltd. 8 Feb., 1967 [8 Nov., 1965], No. 47201/65. Heading H3T. A Class B push-pull power amplifier comprises two pairs of transistors 11, 13 and 14, 21 operated in push-pull, an inductance 16, 18 connected between the emitters of transistors 11, 21 and the collectors of transistors 14, 13, a second inductance 17 connected between the bases of transistors 13, 14 and a constant voltage device 15 connected between the centre taps of the inductances. Inductance 17 forms a secondary winding of an input transformer, further secondary windings, e.g. 12, being connected to the bases of transistors 11, 21. An input signal switches on either transistor 11 or 21, hence causing the constant voltage device 15, e.g. a Zener diode or a neon tube, to conduct and in turn causing either transistor 13 or 14, respectively, to conduct, such that the voltage across power lines 19, 20 is dropped equally between either transistors 11 and 13 or 21 and 14. Inductance 16, 18 forms the primary winding of an output transformer.
Patent GB-1077288-A (GB)
Title: A new amine and process for its manufacture
IPC: C07C43/14
Filed: 1965-11-08
Abstract: 1 - Isopropylamino - 2 - hydroxy - 3 - (o-propargyloxyphenoxy) propane and its acid addition salts are prepared by reacting a 1 - halo - 2 - hydroxy - 3 - (o - propargyloxyphenoxy) propane or 3-(o-propargyloxyphenoxy) - 1,2 - epoxypropane (I) with isopropylamine, optionally followed by salt formation and/or resolution.  The preparation of (I) from catechol via catechol monopropargyl ether is described.ALSO:Pharmaceutical compositions for the treatment of cardiac and circulatory diseases comprise racemic or optically active 1-isopropylamino-2-hydroxy-3-(o-propargyloxyphenoxy)-propane or an acid addition salt thereof together with a carrier.  The compositions may also contain other active ingredients, such as vasodilators.
Patent GB-1247039-A (GB)
Title: Improvements in or relating to implements for the lateral displacement of crop lying on the ground
IPC: A01D78/00
Filed: 1968-10-07
Abstract: 1,247,039. Haymakers. C. VAN DER LELY N.V. 7 Oct., 1968 [12 Oct., 1967], No. 47501/ 68. Heading A1F. A haymaker has rake wheels 35 positioned along an oblique beam 1 which is supported on the ground by a wheel 13, and a second main frame beam 5 rigidly attached near one end of the first beam and extending generally towards its other end. Shown in Fig. 1 is a side-delivery rake. To decrease the working width of the rake the beams 16 and 17 which are attached to beam 1 by bolted flanges 15, 18 may be removed, while to increase the working width an extra beam 41 may be bolted to the leading end of beam 1. In the latter case a rake wheel is added to the leading end of beam 1 so that two extra wheels (shown dotted) are provided.  Beams 7, 8 of the frame joint the second main frame beam 5 to the drawbar 21, the beam 8 being hollow to receive the drawbar which is attached to the tow bar 24 of the tractor. A ground wheel 30 which can take a ground-engaging position for the inoperative transport of the implement or a position away from the ground for operation of the implement is journalled on the drawbar 21. The rake wheel 35 are free to rotate at the ends of cranks 34 which are journalled in sleeve bearings 31, 32, 33 whose axes make angles of about 70 degrees with beam 1. Tension springs 39 connect the cranks 34 with rods 42, 36, 37, 38 which run the length of the main frame beam. The rods are moved axially by the tractor hydraulics via duct 40 or by a manually operated screw mechanism with the result that the weight with which the rake wheels bear on the ground is varied. Fig. 4 shows an embodiment in the form of a swath-turner wherein a further beam 48 parallel to beam 1, is provided having rake wheels of a similar type. Conversion from the swath-turner to the side-delivery function can be quickly made by transferring the two rakewheels from beam 48 to beams 16 and 17. For transporting the implement shown in full lines in Fig. 1, the draw bar 21 is attached directly to the mounting of ground wheel 13 so that beam 1 lies approximately in the direction of travel of the towing vehicle. The implement may be front-mounted as in Fig. 5 in which case the implement is able to rest on ground wheel 63 and two feet 56, 61 while being coupled and uncoupled.
Patent GB-1452935-A (GB)
Title: Record player spindle
IPC: G11B17/16
Filed: 1973-10-11
Abstract: 1452935 Record changer spindle PIONEER ELECTRONIC CORP 11 Oct 1973 [12 Oct 1972] 47632/73 Heading G5R In a record changer spindle secondary supports 74 are moved outwardly to support all but the lowermost record of a stack by longitudinal movement of control shaft 4 and primary supports 81 are withdrawn to release the lowermost record when the shaft is rotated. Downward movement of the shaft 4 allows spring 72 to move assembly 7 downwards against a stop (not shown) so that flexible tongues 741 move along oblique faces 111 and allow leaf springs 73 to slide the secondary support plates 74 outwardly between the lowermost record and the rest of the stack. Thereafter a detector (not shown) senses by its weight the presence of the lowermost record on the primary supports 74 and initiates lowering the shaft to a final position in which a switch is actuated which controls a shaft rotating mechanism whereby pins 431 on a cross member 43 of the shaft slide primary supports 81 inwards against the action of springs 82 and the lowermost record drops to the turntable. If the detector does not sense a record on the primary support the record player is switched off.
Patent GB-1155827-A (GB)
Title: Procedure For The Automatic Analysis Of A Bar Diaphragm
IPC: G04F10/00
Filed: 1966-10-25
Abstract: 1155827 Electric selective signalling KIENZLE APPARATE GmbH 25 Oct 1966 [14 Dec 1965] 47790/66 Headings G4D D7X D6Y D6C1 D6C2 D6L and D1D9E Apparatus for determining recording periods on a bar diagram 5, Fig. 2, (the bar diagram may represent for example when a vehicle was in motion and by the width of the bar who was driving) includes a photo-electric device scanning the bar diagram transversely to the direction of movement of the chart 1 on which the diagram is recorded to supply pulses of different duration (depending on who was driving) to control the distribution of counting pulses representing recording times to appropriate stores, the contents of which are printed at the end of a recording cycle. A lens 11 projects an enlarged image of the bar diagram 5 on to an apertured rotating disc 14, a photo-multiplier 17 transversely scanning through each aperture 14<SP>1</SP> successively the diagram 5 to give a series of pulses of variable width to a shaping circuit 20. A further photo-electrical device 19 supplies timing pulses to the circuit 20 when one of the apertures 14<SP>1</SP> passes in front of it. In an embodiment for two possible width signals, Fig. 5, the width signals are applied to timing circuits 34-37 so that an output signal from one of two comparators 38, 39 enables one of two stores 40, 41 to which the width signals are fed. One of two printer stores 42, 43 is thus enabled to receive recording pulses which are generated by feeding the width signals after inversion to a one-shot multi-vibrator 45. The timing pulses from photoelectric device 19 are fed to a revolution counter 47 which causes read-out after one revolution of the chart 1. This embodiment may also be modified to allow for short pauses to be included in the working times Fig. 7 (not shown) by accumulating pulses during the pauses in a pulse store the contents of which are then transferred to the appropriate store 42, 43. The length of pauses which may be considered as working time is determined by the position of an adjustable switch.
Patent GB-1319688-A (GB)
Title: Multichannel light compensation apparatus
IPC: H04N5/257
Filed: 1970-10-08
Abstract: 1319688 Television shading corrections HAZELTINE CORP 8 Oct 1970 [6 Nov 1969] 47885/70 Headings H3T and H4F In a multi channel picture scanning system having a light source which projects a television type raster on to each of a plurality of pictures (e.g. transparencies), the modulated light being picked up by a separate light detector for each picture, nonuniformities in the light translation characteristic of each channel are corrected by varying the gain of the detector as a function of the position of the light spot in the raster. As shown, Fig. 1, horizontal and vertical sync. pulses from the scanning source are applied to function generators 6, 7 the outputs of which are applied to cross coupling terminal board 12 by means of which suitable horizontal and vertical waveforms are selected and applied to a plurality of dynode drivers 13 to 17 each of which varies the gain of an associated photomultiplier 18 to 22 by varying the voltage applied to one of the dynodes. The generators provided comprise an exponential function generator 8, a parabolic function generator 9 and an additional function generator 10 which can provide other (unspecified) functions. The system is initially set up by scanning a blank picture and selecting appropriate horizontal and vertical functions to obtain a uniform output from the photomultiplier. The terminal board may then be replaced by hard wiring.  The exponential function generator comprises a capacitor (25) charged through a resistor (26) a transistor (24) being provided which is switched on by the sync. pulses and discharges the capacitor, Fig. 2 (not shown). Complementary outputs are provided via buffer and inverting amplifiers. The parabolic function generator comprises a ramp generator (30) followed by an integrator (31). The ramp generator comprises a capacitor (33) charged by constant current generator (34) and the integrator comprises an operational amplifier with a capacitor connected in the feedback loop. The ramp generator and integrator capacitors are periodically discharged by transistors (32 and 29) which are switched on by the sync. pulses.
Patent GB-1453824-A (GB)
Title: Concrete formwork
IPC: E04C3/10
Filed: 1972-10-18
Abstract: 1453824 Formwork for concrete floors; trusses ACROW (ENGS) Ltd 18 Oct 1973 [18 Oct 1972] 48100/72 Headings E1K and E1S A truss for supporting floor formwork comprises a wooden beam 4 having a steel tie bar 8 interconnecting and rigidly secured to the ends of the beam, the tie bar being spaced from the beam between its ends by at least one strut 6. The trusses are arranged in a rectangular grid, supported at their ends on corner posts of scaffolding towers. Such corner posts each carry a screw-jack 34 having an upwardly projecting pin 38, and the trusses have at each end a bracket 18 having a flange 22, 24 with a hole 26 for fitting over a pin 38. As shown, the flange 24 at one end is downwardly offset, so that two adjacent trusses may be fitted on a pin 38 with the tops of their beams 4 flush. Trusses in the transverse direction have level flanges (Fig. 2, not shown) which rest on and are nailed to the beams 4 shown.
Patent GB-1480009-A (GB)
Title: Image intensifier tv fluoroscopy system
IPC: G01N23/04
Filed: 1975-11-25
Abstract: 1480009 X-ray control system PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 25 Nov 1975 48361/75 Heading G1A [ Also in Division G3] A system comprises x-ray tube 1 arranged to pass x-rays through body 5 to image intensifier tube 3, the image on which is viewed by TV camera 6 feeding exposure rate control means 12, 13, 15 and including means 31, 32 automatically increasing the loop gain if the target anode voltage exceeds a predetermined value. The gain of the voltage controlled amplifier 31 is controlled by the output of detector 32 arranged to detect the difference between exposure and predetermined rates, such that the gain is constant when the exposure rate# a predetermined rate and increases when it exceeds the predetermined rate. It may increase in proportion to the excess. Said constant gain may be unity and the maximum gain between 1À5 and 2À5, preferably 2. Said predetermined and exposure rates are represented by reference and control voltages at inputs 34 and 33. Unit 11  controls TV camera 6 to give video signals via amplifier 18 and AGC circuit 19 to TV monitor 21, and via amplifier 31 to amplifier 12 giving a voltage proportional to the peak or average signal. A reference of say 6V is applied at terminal 14 of comparator 13 giving an output range of say -6 to +6V and range converter 15 converts this to say 11 to 4 volts controlling the voltage and current supplied by generator 2. Details of amplifier 31 and detector 32 are given with Figs. 5 and 4 (not shown).
Patent GB-1451603-A (GB)
Title: Superconductive coils
IPC: H01F6/06
Filed: 1972-10-23
Abstract: 1451603 Super-conductive coil CRYOGENICS CONSULTANTS Ltd 23 Oct 1973 [23 Oct 1972] 48829/72 Heading H1P A super-conductive coil comprises a winding of super-conductive wire which is wrapped in at least one yarn of glass fibre wound helically around it, the whole being impregnated with epoxy resin. The glass fibre is preferably soaked in distilled white spirit prior to winding and the solvent removed by heating or in a vacuum either before or after the wrapped wire is wound into a coil. Pairs of yarns may be wound about the wire and the wrapped wire may be impregnated with a mixture of resin and solvent and baked prior to coiling. The wrapped wires may be coiled directly on to one another or adjacent layers of the coil have an interposed glass fibre mat or a layer of polyvinyl alcohol. The coil is filled with epoxy resin by vacuum impregnation.
Patent GB-990165-A (GB)
Title: Piano with electric playing means therefor
IPC: G10F5/02
Filed: 1961-04-11
Abstract: 990,165. Pianos. L. L. VON GUNTEN. April 11, 1961, No. 49155/64. Divided out of 990,164. Heading G5J. The description is the same as that in Specification 990,164 but the claim relate to an electromagnetic operating mechanism for a piano action. The piano is free for normal manual playing when the electromagnetic mechanism is not in use.