baber/WOPTO huggingface dataset:
Patent GB-949953-A (GB)
Title: Purifying isoprene by extractive distillation
IPC: C07C7/08
Filed: 1960-12-16
Abstract: Isoprene is separated from a mixture of close-boiling hydrocarbons by submitting the mixture to extractive distillation employing, as solvent, dibenzyl ether, tricresyl phosphate, di-n-hexyl sebacate, di-isodecyl phthalate or dibutyl phthalate, whereby the purified isoprene is obtained as heads-product. Crude isoprene may be prepared by cracking propylene-dimer, and submitting the crude product to preliminary purification by azeotropic distillation, using acetonitrile or acetone to remove a major proportion of the by-products. The partially purified isoprene is then submitted to the extractive distillation.  In an example, the extractive distillation is carried out in a column having three packed zones, separated by two vertically-spaced feed-points. The lower two packed zones are each equivalent to 36 theoretical trays.  The isoprene mixture is fed in at the lower feed-point; and dibenzyl ether is introduced at the upper feed-point, the ratio of solvent to isoprene mixture being 3 : 1. Specification 840,028 is referred to.
Patent GB-891368-A (GB)
Title: Improvements in or relating to coal cutter chains
Inventor: PROCTOR SIDNEY ERNEST
IPC: E21C25/36
Filed: 1959-12-21
Abstract: 891,368. Coal cutter chains. AUSTIN HOY & CO. Ltd. Nov. 29, 1960 [Dec. 21, 1959], No. 43381/59. Class 24. A coal cutter chain of the kind in which the cutter boxes 11 are linked by ball-headed connectors 16 includes springs 24 tending to urge adjacent links apart so as to avoid wear occasioned by chain slackness. As shown the spring 24 is helical and its ends engage holes 23 in adjacent cutter links, this arrangement also serving to resist chain twist. In another form (Fig. 3, not shown) the spring 24 is replaced by a helical spring arranged in the central bore 12 of each cutter box and acting on the ball heads 17, 18 of adjacent connectors 16 through suitably shaped saddle members interposed between the spring ends and the ball heads. In both forms, every ball joint in the chain is acted on by one of the springs. Specifications 699,636 and 854,671 are referred to.
Patent GB-1099968-A (GB)
Title: Device and method for generating internal spherical surfaces
IPC: B23B5/40
Filed: 1965-10-14
Abstract: 1,099,968. Boring tools. T. MALSCHNER. Oct. 14, 1965 [Jan. 5, 19651, No. 43583/65. Heading B3C. A process for generating an internal spherical cavity in a workpiece comprises rotating a body member relative to the workpiece, said body member having a cutting tool pivotable relative thereto about an axis normal to the axis of rotation of the body member, the simultaneous rotation and pivoting of said body member and cutting tool producing an internal cavity of generally spherical configuration. The device for use in the process comprises a body portion 10 having a pivotable tool holder 13 actuated through at least 90 degrees by lever 24 and link 28 connected to a slidable inner portion 16. Handle 34, or alternatively 31, attached to a stationary outer portion 17 moves the rotating inner portion 16 along the body 10. In further embodiments the pivotable tool holder may have two, three, or four cutting tools set to give different depths of cut and pivotable through 90, 180, 270 or 360 degrees. The pivoting of the tool holder may be operated by a sliding rack (49) (Fig. 3, not shown) and (76) (Fig. 7, not shown) engaging a pinion gear which then either drives a gear train, a chain arrangement or a ball train (88) (Fig. 9, not shown) to move the tool holder. The pivoting of the tool holder through an angle greater than 90 degrees enables the spherical cavity to have its max. diameter below the surface of the workpiece. An additional feature incorporated in the body 10 is an eccentric adjusting device (69) (Figs. 5 and 6, not shown) and (90) (Fig. 8, not shown), for allowing limited adjustment to offset minor misalignment of the device relative to the workpiece.
Patent GB-1422480-A (GB)
Title: Ammonium cinnemates and their use as light-screening agents
IPC: A61K8/00
Filed: 1974-10-10
Abstract: 1422480 Ammonium cinnamates L GIVAUDAN & CIE SA 10 Oct 1974 [11 Oct 1973] 43931/74 Heading C2C The invention comprises compounds of the general Formula I wherein R<SP>(+)</SP> represents the ammonium ion of monoethanolamine, diethanolamine, triethanolamine, bis-(2-hydroxypropyl)amine or tris- (hydroxymethyl)aminomethane. The compounds of Formula I may be used as light screening agents.
Patent GB-439852-A (GB)
IPC: H01J19/66
Abstract: 439,852. Thermionic valves. LORENZ AKT.-GES., C., 1, Lorenzweg, Tempelhof, Berlin. Aug. 13, 1935, No. 22798. Convention date, Aug. 21, 1934. [Class 39 (i)] The cap 2, which preferably consists of ceramic material, is provided with a handle 3 and contacts 4 which are arranged around a cylindrical portion thereof. The cap supports a metallic screen 5 which surrounds the bulb and is closed at its upper end by an insulating plate 6 adapted to carry a connecting plug 7. The valve is inserted into a member 8 which is secured to a wall of a wireless set and carries a screen 9 adapted to support an insulating plate 10. Contact springs 11 bear against the contacts 4 and pin 7 to hold the valve in position.
Patent GB-1161445-A (GB)
Title: Impact Tools
Inventor: KLESSIG ERNST FREDERICK
IPC: B25D9/12
Filed: 1967-09-27
Abstract: 1,161,445. Percussive tools. WORTHING- TON CORP. 27 Sept., 1967 [27 Sept., 1966], No. 43987/67. Heading B4C. A percussive tool comprises an impact piston 36 having operative surface area 52, 53, an inlet passage 47 for supplying pressurized liquid to the surface area 53 continuously and valve means 38 for controlling the flow of liquid to the surface area 52 in order to effect a working stroke, a land 51 on the piston being adapted to close off communication between the pressurized liquid and the surface area 52 while the valve means is still positioned to supply pressurized liquid thereto. The valve means 38 is actuated, in one direction, by means of small diameter pins 62 in direct communication with the inlet passage 47 ; and, in the other direction, by means of larger diameter pins 60 communicating with the inlet passage via ports 70, 71, 72 and a bore 35 controlled by the land 51. In operation, with the apparatus in the position shown a pilot valve 40 is actuated by means of a trigger 44 so as to admit pressurized liquid from an inlet port 30 into the passage 47 and then via a passage 76, bore 37 and passage 75, to act on the surface area 52 so as to cause the piston to effect a working stroke. Towards the end of the stroke, liquid which has been acting on the pins 60 to maintain the valve 38 in the position shown, is exhausted so as to allow the valve to be moved to its other position by liquid acting on the pins 62. The valve 38 then permits the liquid acting on the surface area 52 to be exhausted via bore 35, passage 75, bore 38 and exhaust passage 79 (Fig. 4); the impact piston is then returned by liquid acting on the surface area 53. During operation of the tool only build-up of pressure in the passage 75 is relieved by means of a bumper 52 which is loaded by a spring 93 and by pressurized liquid via a passage 94. A pneumatic-piston type accumulator 48 is also connected to the inlet passage 47.
Patent GB-1371503-A (GB)
Title: Coding of articles
IPC: B07C3/18
Filed: 1971-09-22
Abstract: 1371503 Marking envelopes E B BAYER 22 Sept 1971 [29 Sept 1970 25 May 1971] 44178/71 Heading G4M Articles such as envelopes are marked in predetermined positions for use in sorting by aligning an edge of the article with a line on a preprinted label or a fold on a mask, attaching the label and marking either the label or the envelope through the mask. The mask may be L-shaped, one leg of which carries a matrix of perforations.  A marking may be read using a perspex strip 15 having apertures 16 converging as they approach apertures 11 in a mask 10 to refract light from source 17 on to the article 3 which reflects light through the apertures to photosensitive devices 12, 13 shielded from each other by wall 14a. Alternatively (Fig. 4, not shown) light reflected from the article may enter passages containing photo-cells arranged in a matrix in, e.g. perspex. The inner surfaces of the passages contain an opaque coating, e.g. paint.
Patent GB-999085-A (GB)
Title: Improvements in or relating to fluid filters
IPC: B01D25/26
Filed: 1963-11-08
Abstract: A filter unit is formed of parallel layers of cellulose acetate filter paper each being associated with a back-up membrane of synthetic fibre and a supporting plate of plastics material.  The filters are annular and the fluid flow is radially inwards along the filter face, then perpendicularly through the filter and radially inwards to the outlet at the annulus centre.  The supporting plate supports the filter membranes on lands, and upon the filter becoming choked the membranes are urged against the lands and into the spaces between them, thus preventing the further passage of fluid. Contaminants in the range 0,005-5 microns are separated.
Patent GB-1591826-A (GB)
Title: Focusing electrodes for high-intensity ionizer stage of electrostatic precipitator
IPC: B03C3/41
Filed: 1977-10-25
Abstract: A gas ioniser unit having two coaxially arranged electrodes (27, 50) for generating a highly intensive electrical field (56) transversely through the flow path (arrow) of a gas loaded with solid particles is arranged upstream of an electrostatic particle precipitator. The ioniser anode is formed by a Venturi diffuser (27) through which the gas flows immediately prior to its entry into the particle precipitator. The ioniser cathode is formed by a disc-shaped discharge electrode (50) which is mounted coaxially in the taper of the Venturi diffuser (27) and has a rounded edge. A source of high voltage located between the Venturi diffuser and the discharge electrode causes a corona in the annular region between the edge of the discharge electrode (50) and the cylindrical inner surface (52) of the Venturi diffuser surrounding said discharge electrode. Focusing electrodes (53, 54) at cathode potential are provided on both sides of the discharge electrode, in order to reinforce the electrical field (56) between the said inner surface of the Venturi diffuser and the discharge electrode. As a result, the width of the surface, of the discharge electrode (50), which is subjected to the corona flow and on which particles can settle, is reduced, thus making the cleaning of the discharge electrode (50) easier. <IMAGE>
Patent GB-1339599-A (GB)
Title: Electromagnetic waveguides
IPC: H01P1/16
Filed: 1971-09-23
Abstract: 1339599 Glass fibres for waveguides WESTERN ELECTRIC CO Inc 23 Sept 1971 [25 Sept 1970 (2)] 44317/71 Heading C1M [Also in Division G2]  An electromagnetic waveguide is arranged to deliberately cause coupling between guided modes. The waveguide may be a glass rod with a glass cladding, which is drawn out from stock 20 in oven 21. The coupling is effected by variations in diameter or direction of the waveguide. In Fig. 4, piezo-electric member 22 is activated by signal source 23 to produce variations in thickness. In another embodiment (Fig. 5, not shown), four piezoelectric elements replace member 22, and these are differentially activated to change the direction of the guide axis.
Patent GB-1372416-A (GB)
Title: Signal processing and reproducing method and apparatus
IPC: H04N9/802
Filed: 1971-09-29
Abstract: 1372416 Video still frame apparatus WESTINGHOUSE ELECTRIC CORP 29 Sept 1971 [29 Sept 1970] 44335/71 Heading G5R In a still picture arrangement wherein apparatus 24-28 is effective to select a single video frame from a source 22 and to record the frame in a single track V T  on a disc 18 during one rotation of the disc (e.g. in 1/30th second), further apparatus 12-16 is effective to intermittently sample associated audio signals from a source 10 for a period considerably greater than' one frame period (e.g. for 8¢ seconds), and to record the sampled values in a further single track A T  on the disc, the sampled signals being interleaved with each other during repeated passes of the recording head (not shown) over the same track (e.g. during 255 rotations of the disc). In the arrangement shown, sampling is instigated in response to signals recorded in a clock track C T  already recorded on the disc, and the sampling rate is at least twice the highest frequency component in the incoming audio waveform. The video and interleaved audio signals on the disc are then sequentially transferred to single tracks (V T1 , A T1 , Fig. 5, not shown) on a tape in a video tape deck 50 (Fig. 4), both sets of signals being transferred during single rotations of the disc. Accessing apparatus A L , D A1-3  is then operable to selectively transfer signals from the tape in deck 50 to further discs in buffers D B1-3 , again during single rotations of each disc (and single traverses of the tracks V T1 , A T1 ), whereupon further apparatus such as in Fig. 3 (not shown) is effective to repeatedly scan the video track in each disc and to display the signals as still pictures on displays V p1-3 , and also to reconstitute the audio waveform by selecting the interleaved audio signals in the same sequence as when sampled (over a period of 8¢ seconds).
Patent GB-1429440-A (GB)
Title: Lead acid cells
IPC: H01M4/70
Filed: 1974-10-16
Abstract: 1429440 Grids for lead-acid storage cells ESB Inc 16 Oct 1974 [13 Dec 1973] 44857/74 Heading H1B A cylindrical lead-acid storage cell 10 comprises a tubular negative electrode 16, a cylindrical portion of positive active material 22, a tubular separator 20, sulphuric acid electrolyte and a lead containing positive grid 24, the grid having a cylindrical portion and a portion located on a diametric plane embedded in the cylindrical position active material. Negative active material 18 in the form of lead sponge is in electrical contact with the electrode 16 which consists of a lead cup. The positive active material comprises lead peroxide and the cell is surrounded by a moulded plastics container 12 and cover 14. The grid is formed as a cast sheet which is then bent into. an approximately S-shaped cross-section. In a modification the grid comprises an expanded lead sheet which is formed into an E-shaped cross-section and a moulded lead terminal is provided on the grid.
Patent GB-1498150-A (GB)
Title: Data transfer
IPC: G06F5/06
Filed: 1975-10-30
Abstract: 1498150 Data transfer FUJITSU Ltd 30 Oct 1975 [31 Oct 1974] 45076/75 Heading G4C Binary data is transferred between two units (e.g. a CPU and a magnetic disc or tape unit, card reader or printer) operating at different bit rates by using a buffer store to delay part of the data. To transfer data from the CPU to the write head of the magnetic disc unit operating at twice the frequency a shift register SR (Fig. 7) (capacity 1100 bits) is used to store via enabled gate G1 the first 1100 bits from the CPU. These are then read out alternately with the next 1100 bits fed directly from the CPU via gates G3, G4 enabled alternately by clock CL so that data is fed to the head at twice the frequency of data supplied by the CPU. Conversely data read from the magnetic disc is read alternately directly to the CPU and into a 1100 bit shift register SR, the contents of the register being read out after 1100 bits have been fed directly to the CPU. The apparatus may be modified to handle data transfers when operating frequencies of the two units are in the ratio of 1 : n (Figs. 5, 6, not shown).
Patent GB-1160074-A (GB)
Title: Thermal Protective Switch
IPC: H01H73/30
Filed: 1966-10-14
Abstract: 1,160,074. Thermally actuated switches. LICENTIA PATENT - VERWALTUNGSG.m.b.H. 14 Oct., 1966 [15 Oct., 1965], No. 45950/66. Heading H1N. In a thermal protective switch in which the bimetal strip 2, Fig. 1, co-operates directly (as at 2a, 9a) with an operating member such as a push-button 9, the strip 2 is mounted on a leaf spring contact carrier 3 and arranged so that the switching movement is perpendicular to the thermal deflection. On heating by coil 7 the strip 2 deflects into a slot 12, Fig. 2, to release to contacts 4, 5 under the action of the spring 3. The contacts are re-closed by cooperating cam faces 2b, 9b when the pushbutton 9 is depressed against spring 11 on guide rod 10. Thermal adjustment may be obtained by a screw 13 engaging the base 3a of the spring carrier 3. In modifications the projection 9a on the push-button 9 may be a metal plate or replaced by an adjustable screw (15), Fig. 3 (not shown) projecting across the slot 12 and providing temperature adjustment.
Patent GB-1357435-A (GB)
Title: Production of alkoxyacetaldehydes and acyloxyacetaldehydes
IPC: C07C45/00
Filed: 1971-10-06
Abstract: 1357435 Aldehydes BADISCHE ANILIN- & SODA-FABRIK AG 6 Oct 1971 [7 Oct 1970] 46434/71 Heading C2C An alkoxyacetaldehyde or an acyloxyacetaldehyde (generally of [formula where R is C 1 -C 6  alkyl or acyl) is prepared by catalytic dehydrogenation at 150-350‹ C. of a corresponding alkoxyethanol or acyloxyethanol generally of formula ROCH 2 CH 2 OH) in the presence of a basic nitrogen compound, e.g. ammonia, urotropine or a C 1 -C 8  alkylamine. The catalyst may comprise one or more transition metals (e.g. copper, silver or brass) and a basic metal oxide (e.g. MgO, ZnO 2 ) and the process may be carried out at 20-100 torr. in the presence of an inert gas and steam.
Patent GB-1141633-A (GB)
Title: Improvements in or relating to aspartic acid derivatives
IPC: C07K1/00
Filed: 1966-02-24
Abstract: 1,141,633. N - Acetyl - L - aspartic acid esters. ISTITUTO FARMACOLOGICO SERONO S.p.A. 24 Feb., 1966 [27 Feb., 1965], No. 46511/68. Divided out of 1,141,632. Heading C2C. α - Methyl - N - acetyl - L - aspartate, (m.p. 121-2‹ C.) # - methyl - N - acetyl - L - aspartate (m.p. 144-5‹ C.) and #-ethyl- N - acetyl - L - aspartate are prepared by reacting the L - aspartic acid ester with acetic anhydride.
Patent GB-1158068-A (GB)
Title: Fishing Hook Holder
Inventor: LANE TONY
IPC: A01K97/06
Filed: 1967-10-12
Abstract: 1,158,068. Holder for fish-hooks. T. LANE and S. EVANS. 26 April, 1968 [12 Oct., 1967], No. 46609/67. Heading A1A. A holder for fish hooks comprises an apertured member 12 and a resilient member 16 for retaining the traces 22. The member 12 may be in the form of a drum.
Patent GB-1503339-A (GB)
Title: Magnetic tape playing device
IPC: G11B5/027
Filed: 1975-11-12
Abstract: 1503339 Track-switching in multi-track tape players MOTOROLA Inc 12 Nov 1975 [31 Dec 1974] 46770/75 Heading G5R A tape player for replaying any selected one of two or more programmes on multitrack magnetic tape, each programme consisting of two or more tracks for simultaneous reproduction, has a multiplicity of fixed magnetic pick-ups 12a each aligned with a respective track, and electronic switches 14, one per pick-up, controlled by control means 23 responsive to programme selecting means 28 and to means 27 automatically determining how many tracks form a programme on the tape being played so that the control 23 activates only appropriate ones of the switches 14 to pass therethrough signals from the corresponding magnetic pick-ups. An eight-track cartridge player may have a single eight track head or two four-track heads (3), Figs. 1A, 1B (not shown), the pick-ups (3a) of which are represented at 12a in Fig. 2. Switching between programmes on the tape and between a stereo and a quad. mode is effected by a logic circuit 23 controlling voltage controlled amplifiers 14, each connected to a respective pick-up 12a and controlled by input 17a from circuit 23 to selectively permit or block passage of its replay signal input to output matrix 18. Matrix 18 has a control input 22 and in a first state connects each replay signal input to a respective single output 21a and in a second state connects the replay inputs to paired outputs 21a, 21b. Logic circuit 23 and matrix 18 are controlled by a first command signal generator 27, responsive to a switch (8), Fig. 1A, sensing whether the cartridge is quad. with an indicating groove (7) or stereo without such a groove, and by a second command signal generator 28 for sequencing between programmes and responsive to a manually operated switch and to contacts (4) for sensing a conductive area on the tape. NAB equalization amplifiers may be inserted between amplifiers 14 and matrix 18.
Patent GB-1159766-A (GB)
Title: Photo-Electric Exposure Device or Regulator.
IPC: G01J1/42
Filed: 1967-10-16
Abstract: 1,159,766. Light intensity measurement. P. GOSSEN & CO. G.m.b.H. Oct. 16, 1967 [Feb. 25, 1967], No. 46974/67. Heading G1A. [Also in Division G2] A light intensity measuring device in which a light attenuator is adjusted to vary the light falling on a photo-electric resistance causing the illumination of two indicator lamps to vary inversely is characterized in that the lamps are powered via transistor amplifiers. The exposure meter shown has an attenuator mask 13 (13a Fig. 2) of the beak type which is moved transversely and co-operates with fixed masking elements 13b to vary the amount of light (the intensity of which is to be measured) falling on a photo-electric resistance 1. The movement may also control a calculating ring or directly control a camera. A grey wedge may be used in conjunction with the mask to increase the range of the meter. Alternatively an iris diaphragm may be used. The photo-electric resistance and one of two resistors 4 and 5, selected by a measuring range switch 6, form a potential divider supplied from a battery 3. The output of the divider is amplified by a transistor 7 and supplied via a resistor 8 to a lamp 9, and via a second transistor 10, which functions as an inverter, to the second indicator lamp 11. The lamps are in a two compartment housing Fig. 3 and 4 (not shown) and the two compartments are covered by a diffuser lens (translucent plate). In one form the glow of the lamps appears as a single bright spot which moves its position as the mask is adjusted, the required setting being reached when the spot is in the centre. A mask Fig. 5 (not shown) having two arrow shaped apertures pointing towards one another may be positioned over the diffuser lens to facilitate this adjustment. In another form the glow appears a bright spot and two other spots one on either side, which latter spots are of equal brightness when the required setting is reached. Alternative circuits with an additional transistor functioning as a pre amplifier are described. In one form independent amplifiers are used and additional resistors limit the voltage of the lamps. In another arrangement Fig. 8 (not shown) employs a second (non photo-electric) potential divider and a differential amplifier are used to eliminate the effects of temperature changes and voltage variations of the battery.