baber/WOPTO huggingface dataset:
Patent GB-629347-A (GB)
Title: Improvements in or relating to communication systems utilizing pulse modulation
IPC: H04N7/084
Filed: 1947-02-10
Abstract: 629,347. Pulse modulation; multiplex pulse signalling. MACKAY, D. M. Feb. 10, 1947, No. 3810. [Class 40 (v)] In a television system, in which the sound is transmitted during the fly-back intervals between successive scanning periods in the form of pulses, the pulses may be both time and duration modulated so as to carry two signals. Alternatively the pulse may be modulated in time and duration by one signal, thus doubling the maximum modulated frequency which can be employed. From a vision transmitter 16 (Fig. 2) is derived a synchronizing pulse signal which is applied to a saw-tooth generator 19, the output of which is indicated at 20 (Fig. 3). A device 21 for modulating the leading edge of a pulse train as at 23 (Fig. 3), comprises a pentode valve normally biassed to cut-off, to which are applied the saw-tooth voltage and an audio modulating voltage in known manner. The time-modulated pulses 23 are then used to synchronize a further saw-tooth generator 24 giving an output as at 25 (Fig. 3) which is the duration modulated in known manner in a device 27. The output 31 (Fig. 3) may be duration modulated according to a second audio signal or according to the first audio signal through a time-delay 28 by means of switch 30. The output is then applied to transmitter 16 to produce a composite vision and sound signal. In reception, the composite signal is fed to a receiver 33 (Fig. 4), the sound signals being derived from an output circuit 35 (Fig. 4), and being as at 35 (Fig. 5). The output 35 is fed to a normal duration demodulation device 36, filter 38, amplifier 39 and load device 40. Demodulation of the time-modulation is effected by converting the time-modulation to duration modulation in a device 43, by means of a squarewave generator 41, synchronized by the timemodulated pulses, and feeding the durationmodulated output to the duration demodulator 36, or to a separate demodulating channel 48. Fig. 6 shows the time to duration converter 43. The synchronized square-wave 42 (Fig. 5) is applied to the suppressor grid of a pentode valve V, to the control grid of which is applied a sawtooth wave 44 (Fig. 5). The leading edge of each saw-tooth is synchronized with the leading edge of each transmitted synchronizing pulse, whereas the leading edge of each square-wave is synchronized with the leading edge of each time-modulated signal pulse. The valve V is biassed so that only when both the square-wave and the saw-tooth wave assume their maximum value will the valve conduct. As shown in Fig. 5, the valve will only conduct during the period 45, 46, producing the variable-width output Vg depending on the original timemodulation. The flat portion of the saw-tooth Vg is due to grid current limiting effect. The values of resistors R1 and R21 and RL and RB are so chosen that the mean duration of the anode pulse of valve V is the same as that of the transmitted pulse. Specification 564,511 is referred to in the Provisional Specification.
Patent GB-1207062-A (GB)
Title: An improved composite polyamide polyester, sheath-core filament and a method for manufacturing the same
IPC: D01F8/14
Filed: 1968-01-24
Abstract: 1,207,062. Sheath-core polyamide polyester filaments. TORAY INDUSTRIES Inc. 24 Jan., 1968 [27 Jan., 1967; 9 June, 1967; 13 Oct., 1967], No. 3844/68. Heading B5B. Composite sheath-core filaments in which the sheath component consists of an aliphatic polyamide and the core component consists of polyethylene terephthalate are characterized in that 20 to 60% by weight of the filament consists of the polyester and in that either the centre of the area of a cross-section of the core and the centre of the area of a cross-section of the composite filament coincide, or, if said centres of the areas do not coincide, then the distance between them divided by the " effective radius " of the cross-section of the composite filament is less than 0À2. The aliphatic polyamide may be poly-#-caproamide or polyhexamethylene adipamide. The filaments may be made by simultaneously extruding the molten polyester and the polyamide through the extrusion orifices of a pair of spinnerets arranged one above the other in such a manner that each orifice of the upper spinneret is above a corresponding orifice of the lower spinneret, the molten polyester being extruded through the orifice of the upper spinneret into the inlet portion of the corresponding orifice of the lower spinneret, which inlet portion has a greater cross-sectional area than the outlet portion of the orifice of the upper spinneret and is supplied with the molten polyamide in such a manner that the stream of molten polyester passing through the orifice of the lower spinneret is surrounded by a stream of the molten polyamide. The relative mean diameters of the corresponding spinneret orifices and the distance between their axes are such that the eccentricity of the filaments produced is less than 0À2. The rate of extrusion of the polyester is between 20 and 60% by weight of the combined rates of extrusion of the polyester and the polyamide. The aliphatic polyamide used may be poly-#-caproamide having a degree of polymerization of over 200 or polyhexamethylene adipamide having a degree of polymerization of over 90. The polyester used may have a degree of polymerization of over 90. When poly-#-caproamide is used as the aliphatic polyamide component, its birefringence may be maintained at a value below 2 Î 10<SP>-3</SP> and the composite filament may thereafter be stretched. The melt-spun composite filaments may be subjected to a stretching operation in which it is passed over and in contact with a heating member the surface temperature of which is maintained between a lower limit (TL) expressed by the equation: TL= -8+18À1 log 10 D +0À3##V, wherein TL>45‹ C., D=total denier of the unstretched multifilament yarn V=feeding speed of the unstretched multifilament yarn in metres per minute, and an upper limit (TH) expressed by the equation: TH= - 5+33À3 log 10  D + 0À3##V. The expression " effective radius " is defined as the radius of a circle circumscribing the cross-section of the composite filament.
Patent GB-1457295-A (GB)
Title: Flexible skirt members for gas-cushion vehicles
IPC: B60V1/16
Filed: 1974-01-28
Abstract: 1457295 Air cushion vehicle flexible skirts HOVERMARINE TRANSPORT Ltd 23 Jan 1975 [28 Jan 1974] 03877/74 Heading B7K A flexible skirt member for a gas-cushion vehicle comprises a generally triangular-shaped layer of flexible material resin forced by a plurality of flexible filaments distributed at random within the layer. The layer may be used by itself as flexible sheet material or may comprise a coating on a woven fabric, e.g. a woven nylon fabric. The skirt member may be produced by mixing together a base material, e.g. rubber or neoprene, and a plurality of flexible filaments, e.g. nylon, carbon, metallic or polypropylene fibres, and rolling out the mix to form the layer. The distribution of filaments may differ throughout the layer, a concentration of filaments being provided at a point where greater wear is expected.
Patent GB-243576-A (GB)
Title: Improvements in or relating to phonographs
IPC: G10K13/00
Filed: 1925-02-11
Abstract: 243,576. Bartholomew, A. O. Feb. 11, 1925. Tone-arms and internal horns, connections between.-The neck of the horn, connecting it to the tone-arm, is made of a massive non- resonant block 10 of cementitious material, which is cast so as to have formed therein a single curved sound-passage 11, the volume of the solid body being much greater than that of the passage. Undesired vibrations are thus absorbed. The sound-passage widens from the narrow end adjacent to the tone-arm 12 to a trapezoidal mouth connecting with the horn proper 14. The block, which is preferably made of plaster of paris mixed with ordinary cement, fits closely in a chamber formed by a wall 23 of the casing, partitions 21, 22, the base of the casing, and a partition 16. The walls of the passage 11 are coated with shellac or the like.
Patent GB-1467115-A (GB)
Title: Alkyl and alkenyl-substituted 1,4-6-octatrienes
IPC: C07C1/00
Filed: 1975-01-30
Abstract: 1467115 Substituted 1,4,6-octatrienes L GIVAUDAN & CIE SA 30 Jan 1975 [30 Jan 1974] 4101/75 Heading C5E [Also in Division A5] Compounds of the formula (I) in which each R is H or C 1 -C 7  alkyl or alkenyl, with the proviso that not more than 2 R's are H and the R's at C<SP>2</SP> and C<SP>7</SP> do not simultaneously represent H, are prepared by dimerising or comerising componds of the formula or isomerising a compound of the formula in the presence of palladium salts or complexes and an acid catalyst. The acid catalyst may be a mineral acid or a Lewis acid. Examples describe the dimerisation of isoprene to give 2,7- dimethyl-1,4,6-octatriene in the presence of Pd acetylacetonate, tricyclohexylphosphine and BF 3  etherate or phosphoric acid; the dimerisation of dimethylbutadiene to give 2,3,6,7-tetramethyl-1,4,6-octatriene in the presence of Pd acetate, trioctylphosphine and BF 3  etherate; and the co-dimerisation of isoprene and myrcene to give 2,11 - dimethyl - 7 - methylene - 2,4,10- dodecatriene and 2,7,11 - trimethyl - 1,4,6,10- dodecatetraene in the presence of Pd acetylacetate, tricyclohexyl phosphine and phosphoric acid. The reactions may be carried out at 60- 150‹ C. optionally in the presence of a solvent. The compounds of the formula (I) with the exception of 2,6-dimethyl and 3,7-dimethyloctatrienes-1,4,6 are claimed per se.
Patent GB-693566-A (GB)
Title: Improvements relating to devices for securing members together under strain
IPC: F16B5/02
Filed: 1950-02-17
Abstract: 693,566. Screw fastenings; band clips. STARCK, J. R. April 9, 1951 [Feb. 17, 1950], No. 4133/50. Class 44 Two members to be secured together under strain are supported in spaced relation by a single externally threaded male member engaged adjustably in an internally threaded female member. In the form of Fig. 1 two angle section members 12 are secured together by a bolt 13 and nut 14. Tipping of the members 12 is prevented by an adjustable distance piece comprising a sleeve 11 screwing into a nut 10. The parts 10, 11 may be locked by a locking washer having deformable tongues or the head end of the bolt 13 may be formed with a square engaging in a square socket of the sleeve 11. The bolt may be replaced by a stud with nuts at each end or stud parts may be formed integrally with each distance piece member, the member 11 carrying a lock nut to secure the parts in adjusted position. In the form of Fig. 4 the ends 20 of the strap of a band clip are wrapped around plate members 19 drawn together by a bolt 17 with the members 10, 11 to prevent tipping. In the form. of Fig. 5 the strap ends 20 are clamped between plates 19 and L section members 21, the members 21 being cast with triangular side cheeks. Apertured lugs may be provided on each side of the members 21 to receive bolts additional to or replacing the bolt 17, the distance pieces 10, 11 acting as before. In the form of Fig. 10 the screw member 11 and sleeve member 10 are each formed with end flanges 37 and engage in collars 40 which may be connected with the ends 39 of the strap of a band clip. One of the collars may be split and have a tightening screw for taking up wear.
Patent GB-566297-A (GB)
Title: Improvements in or relating to fasteners for securing panels in position
IPC: F16B5/02
Filed: 1943-03-17
Abstract: 566,297. Fastenings. DIAPER, H. E. March 17, 1943, Nos. 4351 and 6330. [Classes 44 and 89 (i)] Means to unfasten a member 1, such as a panel on an aircraft, from a second member 2, comprise a tubular part 3 secured to the panel 1 and containing a spindle 10 which is forced downwards by thumb pressure on a head 10a against the pressure of a spring 14 so that bolts 8 may slide towards one another when a part 10c is lowered. Cam surfaces 10e coact with heads 24 on the bolts. Fig. 1 shows the fastening secured by the bolt heads bearing on surfaces 9 of a tubular member 6 secured to the member 2. When pressed downwards, the head 10a becomes wedged in a tapered surface 20 and the upward force of the spring 14 separates the members 1 and 2, and the surfaces 9 force the bolts inwards. The flange 10d is then exposed so that the head 10a can be eased upwards from the surface 20. A spring 21, which is stressed in Fig. 1, maintains the portion 10c lower than the bolts 8 when the part 3 is free from the socket 6. On re-coupling the parts 1 and 2, the bolts 8 are pressed inwards by surfaces 25 and afterwards outwards under surfaces 9, and the spring 14 forces the spindle 10 upwards against the pressure of spring 21. The fastening is suitable for stressed skin panels where heavy shear loads have to be taken.. Fig. 2 shows a modification with a narrow socket 6<1> attached to a plate 27 which is free to move transversely relatively to the member 2<1>. The opening 30 provides substantial clearance for the top 31 of the socket, and the rivets 33 have enlarged heads 32 which bear on the underside of the plate 27. Holes 34 in the latter give a large clearance around each rivet. Accurate fitting of the parts 6<1> and 2<1> is thus not essential. Fig. 5 shows a further arrangement. Thumb pressure is applied at one edge of the head 10a, an index 40 being marked on one side of an upright 13 of the member 3, and the head tilts and is held in the lowered position by engaging a notch 42. When the flange 10d is separated from the spring 14, the spring 21 restores the head 10a to the position shown in the Figure. An inclined surface may be provided diametrically opposite to the notch 42, to guide the head 10a sideways. Alternatively, a spring-latch may be provided to spring over the head 10a. Fig. 7 shows means for the simultaneous uncoupling of a number of fastenings around the edge of a panel, comprising a cable 49 passing through a coil 48 on a spring 14 for each fastening. Collars on the cable cause transverse movement of parts 14b of the springs, and the parts roc drop under pressure from springs 46. The spindle 10 may have rotary, as well as axial, movement. The second Provisional Specification states that the socket 6 may be case hardened.
Patent GB-451780-A (GB)
Title: Improvements in or relating to fluid pressure governors
IPC: G05D16/06
Filed: 1935-02-11
Abstract: 451,780. Pressure-regnlating valves. GAS LIGHT & COKE CO., PINKESS, L. H., and HADOW, H. J., 84, Horseferry Road, Westminster. Feb. 11, 1935, No. 4409. [Class 135] A removable valve seat 30 for fluid-pressure governors has an upstanding resilient part 31, 32 which is compressed by the actuating diaphragm 19 or the means for securing the diaphragm in position so as to press the valve seat proper against a shoulder 15 in the valve casing. The upstanding part 31, 32 comprises four resilient arms 31 joined by a beaded rim 32 located beneath a washer 20. The diaphragm 19 is positioned between washers 20, 21 and retained against a shoulder 13 by a threaded cap 22. A plate 23 on the diaphragm has a stud 26 for locating a suitable weight 27 and a cylindrical part 43 with a rim 24 which is bent up to clamp the diaphragm and a washer 25 to the plate 23. The stem 28 of the valve member 29 is screwed into the part 43. An abutment 41 prevents the diaphragm descending far enough to obstruct the gas passage. Three pips 34 struck in the edge of the valve seat aperture prevent the valve member engaging the seat except at the pips so that sticking of the valve to its seat owing to gummy deposits is minimized. However in the case of such sticking, the valve may be dislodged by a spring-pressed hexagonal head 37 below the breathing passage 35.
Patent GB-699195-A (GB)
Title: Improvements in the production of neutral salts of aluminium from formic, acetic or propionic acid
IPC: C07C51/41
Filed: 1951-02-23
Abstract: Neutral aluminium salts of formic, acetic or propionic acid are prepared by reacting aqueous solutions of inorganic aluminium salts with hydroxides or carbonates of the alkalies (including ammonium) at temperatures below 50 DEG  C., preferably not substantially above 40 DEG  C., freeing the resulting aluminium hydroxide from mother liquor, dissolving the still water-containing hydroxide in about three mols. of desired acid per mol. of aluminium hydroxide and thereafter allowing the neutral aluminium salt formed to crystallize out after concentration or evaporating the solution to dryness, preferably in an atomizing drier.  If the aqueous solution of inorganic aluminium salt employed does not contain sulphate ions as in the case of solutions of aluminium chloride or nitrate or waste liquors from Friedel-Crafts reactions, then preferably small quantities of water-soluble substances giving rise to sulphate ions are added to the solution or to the precipitant, e.g. sulphuric acid or aluminium, sodium or ammonium sulphate. Examples describe the production of aluminium triformate pentahydrate formed by the above-mentioned crystallization and aluminium triformate and tri-acetate obtained by atomization drying and the tri-propionate may be obtained in the same manner, all containing substantially the theoretical Al2O3 content.ALSO:Aluminium hydroxide is prepared by reacting aqueous solutions of inorganic aluminium salts with hydroxides or carbonates of the alkalis (including ammonium) at temperatures below 50 DEG C, small quantities of water-soluble substances giving rise to sulphate ions in solution being added to the aqueous solution or to the precipitant if such ions are not already present.  Thus, when the aqueous solution employed is that of aluminium chloride or nitrate or is a waste liquor from a Friedel-Crafts reaction, then sulphuric acid or sodium, ammonium or aluminium sulphate may be introduced.  Examples are given.  The aluminium hydroxide is used to form organic salts (see Group IV(b)).
Patent GB-342541-A (GB)
Title: Improved revolving drum for mixing, shaking and cracking
IPC: B01F9/00
Filed: 1930-02-10
Abstract: 342,541. Rumbles and tumbling- barrels. POLLAK, J. E., 20, Holborn, London.-(Machine-fabriek I.H.O.R. ; 33, Willemskade, Schiedam, Holland.) Feb. 10, 1930, No. 4506. [A Specification was laid open to inspection under Sect. 91 of the Acts, Feb. 11, 1930]. [Classes 60 and 138 (i).] A rotating drum for beating and shaking sacks &c. or for other purposes is made in two parts, one of which is detachable and forms a loading vehicle, and is supported in the operative position from carrying bars on the side edges of the main part of the drum. The detachable part 5, fitted with rail wheels 11, is provided with inclined members 14 which are engaged by rollers 4 mounted on the carrying bars 3 on the main part 1. One end of the detachable part is provided with claws 6 which engage bolts 7 on the main part ; at the opposite end the rails 3 are provided with bolts 8 passing through holes in the frame of the vehicle part, the parts being secured by wing nuts 10. For cleaning sacks &c. the drum is in the form of a cage and is enclosed in a two-part casing 16, 17, the lower part 17 being swung round to permit the removal of the vehicle part 5. A brush 18 is provided for removing dust.
Patent GB-230258-A (GB)
Title: Improvements relating to animal traps
IPC: A01M23/34
Filed: 1923-12-17
Abstract: 230,258. Coles, F. J. Dec. 17, 1923. Animal traps. - A noose trap comprises a frame a of wire or pressed metal anchored by a spike d and having pivoted to it a spring-actuated arm e carrying a roller f<1>, which, in the set position of the trap shown in dotted lines in the Figure, is engaged by the hook on a. bell crank catch lever b pivoted to the frame. A noose c extends from the spike d to the end of the bell crank b so that the rabbit &c. in touching the noose swings this lever b and releases the arm e, the rabbit being thus caught between thearm e and the noose c, the arm e also striking theanimal and killing it.
Patent GB-196745-A (GB)
Title: Improvements in or relating to foster mothers, and the like
IPC: A01K31/19
Filed: 1922-02-17
Abstract: 196,745. Vane, M., and Schofield, W. R., (trading as Forward Appliance Works). Feb. 17, 1922. Rearing-appliances. - A fostermother has a flat cover 2 with an aperture 3 for the insertion of a lamp 4 to be supported upon a flange 14 or the like. The cover forms a double flue, the lower part 10 receiving flue-gases from the perforations 9 and communicating by means of several apertures 11 with the upper part 12 in which outlet apertures 13 are formed. The lamp reservoir is surrounded bv an air-chamber 18 with inlet openings 19<a>, 20. From this chamber air passes through perforated plates 19, 21 to the burner 5, and through pipes 17 to the upper chamber 8, which also receives the flue gases. Additional air reaches the burner through apertures in a surrounding plate 22 and cone 26. The chimney 6, 7 is telescopic to give access to the burner. An air inlet 23 below the lamp may be covered with a perforated plate 24.
Patent GB-1061991-A (GB)
Title: Improvements in and relating to extrusion processes
Inventor: PEACOCK DONALD GEORGE
IPC: B29C48/08
Filed: 1963-02-05
Abstract: 1,061,991. Coated sheet material. B. X. PLASTICS Ltd. Jan. 23, 1964 [Feb. 5, 1963], No. 4692/63. Heading B2E. [Also in Division B5] Plastics material extruded through a channel 3 is coated with plastics material extruded through a channel 9 at a cut away portion 3a. The combination of base and coating layers increases in speed as it approaches the die lips 4 and the thickness of the layers is reduced to a desired level.
Patent GB-568509-A (GB)
Title: An instrument for recording surface roughness
IPC: G01B5/28
Filed: 1943-03-23
Abstract: 568,509. Recording surface roughnees. TOMLINSON, G. A. March 23, 1943, No. 4702. [Classes 106 (ii) and 106 (iv)] An instrument for recording surface roughness comprise a feeler 4 which has a rounded end 5 contacting _the surface, the feeler being movable longitudinally in a base 2 provided with a sole, plate 1 to rest on the surface. The rounded end 5 of the feeler is large enough not to be influenced by minor roughness and the sole plates span a considerable number of the roughness crests to be recorded. The feeler 4 passes through a disc 3 secured to the sole plate 1 and has adjustably attached to it a second disc 6. The two discs are connected by three springs 8, inclined to the axis of the feeler so that as the feeler moves longitudinally, it is also caused to have a rotational motion, this motion being transmitted to a recording arm 10 to make a record on a smoked plate on a table 16 slidable along guides 12, 13. As the instrument is moved to explore the surface under test, the record table 16 is given a similar but reduced motion by a cord 23 attached to a fixed point 24 and operating a lever 20 pivoted at 21 and engaging a pin 22 on the table. The instrument is balanced by a weight 28 on an arm 30. The weight 28 may be replaced by a guide plate 31, Fig. 2, when the instrument is to be used on a convex surface. For use on a concave surface, support is obtained by providing two bars below the longer edges of the base 2.
Patent GB-548541-A (GB)
Title: Improvements relating to wheel axle constructions
IPC: B60B35/04
Filed: 1941-04-10
Abstract: 548,541. Wheel axles. SMITH, A. E., and BLACKSTONE & CO., Ltd. April 10, 1941; No. 4803: [Class 108 (ii)] The stub axle a has a permanent head d securing the wheel hub b in place and is detachably secured to the vehicle frame or axle so that it can be readily fitted and removed with the wheel. The head d preferably fits into a recess in the wheel hub as shown. In the construction shown the'stub axle is secured to a frame angle member g by a U-bolt e and a bolt f, the latter passing through a hole near the inner end of the stub axle. A loose collar c may be provided on the stub axle between the hub and the member g.