baber/WOPTO huggingface dataset:
Patent GB-1366845-A (GB)
Title: Integrated thyristor semiconductor arrangements
IPC: H01L29/74
Filed: 1973-03-21
Abstract: 1366845 Thyristors SIEMENS AG 21 March 1973 [23 March 1972] 13461/73 Heading H1K A thyristor (Figs. 1, 2) has a square semiconductor body within which a first cathode zone 1 of, e.g. N-type Si of annular shape has a central aperture containing an ignition electrode 6 electrically connected to a P-type base zone 2. A further P-type zone 7 extending to the boundaries of the square defines the anode of an antiparallel connected diode. A third zone 3 underlying zone 2 forms an N-type base zone of the transistor, and under this is a fourth P-type anode zone 4, surrounded by an edge N-type zone 8 forming the diode cathodes Electrodes 5 and 9 are applied to the thyristor cathode 1 and anode 4, and are electrically connected to P-type base 2 and N-type base 3, and to diode anode 7 and cathode 8 respectively. For negative potential on electrode 5 and positive on electrode 9, the integrated diode is blocked and positive potential on electrode 6 fires the thyristor, while with positive potential on electrode 5 and negative on electrode 9 the diode conducts a reverse current, so that for control of oscillating current the thyristor fires during positive halfwave and the negative halfwave traverses the diode. The anode of the latter is spaced a distance d (= at least 2 diffusion lengths) from the thyristor cathode and its cathode is similarly spaced from the thyristor anode so that stored charge carries are eliminated by recombination to discourage unintended ignition. In a modification (Fig. 3, not shown) the lower zone of the thyristor extends over the whole width of the s/c body and the diode has four layers incorporating the P, N, and P layers of the thyristor and the cathode N-zone 8; so that it conducts on a trigger voltage not exceeding the highest allowable thyristor blocking voltage. A five layer diode may be used, alternatively, with a trigger voltage which drops on triggering to the Zener voltage of one of the outer PN junctions. The zone sequence of the thyristor may equally be PN PN with reversal of the diode anode and cathode. The zones may be doped by the usual masking and diffusion, and the thyristor is surrounded by the diode on all sides.
Patent GB-659462-A (GB)
Title: Improvements in manufacture of sulphamethazine
IPC: C07D239/69
Filed: 1949-05-20
Abstract: Sulphaguanidine is recovered from an impure mixture of sulphamethazine and sulphaguanidine, obtained in the preparation of sulphamethazine by the condensation of sulphaguanidine with acetyl acetone, by heating the mixture with water to at least 50 DEG  C., thereby effecting solution in the hot water of the sulphaguanidine and the impurities while leaving the sulphamethazine in undissolved substantially pure form.  The sulphamethazine is filtered off and the filtrate cooled to precipitate firstly gummy impurities and then, on further cooling, a mixture of sulphaguanidine and sulphmethazine.  A convenient method of carrying out the process simultaneously with recovery of unused acetyl acetone consists in steam distilling the impure reaction mixture to drive off the excess acetyl acetone together with any acetone and acetic acid, which may be present, and working up the aqueous residue as above.  In an example, sulphaguanidine hydrate and acetyl acetone are heated together and the product steam-distilled.  The hot aqueous suspension left is filtered to remove the sulphamethazine, and the filtrate cooled to deposit a mixture of sulphaguanidine and sulphamethazine.  In a second example, a reacton mixture obtained as above is steam distilled and the aqueous residue filtered to remove sulphamethazine. The filtrate is cooled to a point where no more gummy material is precipitated and is then decanted and allowed to stand at room temperature to deposit a crystalline mixture of sulphaguanidine and sulphamethazine.  The steam distillate is fractionated to recover acetyl acetone.  A third example is given in which the mixture of sulphamethazine and sulphaguanidine obtained after the steam distillation and filtering off of the pure sulphamethazine, is separated by the process described in Specification 659,461.
Patent GB-712005-A (GB)
Title: Improvements in and relating to electrical signalling systems
IPC: G01R11/60
Filed: 1952-05-28
Abstract: 712,005. Electromagnetic vibrator instruments; indicating excess load in A.C. circuits. GENERAL ELECTRIC CO., Ltd., POLGREEN, G. R., and CHAPPLE, W. J. C. May 28, 1952, No. 13580/52. Class 37. [Also in Group XXXVIII] An electromagnetic vibrator serves as an A.C. excess load indicator or warning device with the vibratory element itself, e.g. reed 12 in Fig. 2, set into appreciably audible vibration when the load current exceeds a predetermined value. In Figs. 2 and 2a the load circuit feed cable 10 energizes the electromagnet 9 which co-operates with reed 12 and the latter may be moved towards or away from pole faces 11 by a nut 15 having a dial 17 which shows the load current at which the device is set to operate. The cable 10 continuous within the device is clipped into the electromagnet at 19 and a protective cover is provided at 18. In a further embodiment Figs. I and Ia (not shown) a U-shaped electromagnet provided with a central yoke co-operates with a vibrating disc and the circuit feed cable is wound about the central yoke. A simplified arrangement Fig. 4 employs a D-shaped steel strip electromagnet having an air gap at 30 and when the load current through cable 33 exceeds the pre-set or design value the horizontal limb 32 vibrates with high intensity and gives the required audible warning. A further form employs a D-shaped electromagnet strip Figs. 3 and 3a (not shown) made up of two component strips and comprises a nut which can be slackened off to open the D for insertion of the cable. In Fig. 5 a U-shaped steel strip electromagnet is rivetted within an aluminium bridge member 35 and comprises a horizontal vibrator strip 40 and curved upwardly directed strip 36; an adjustment nut for strip 40 is included at 42 and the magnetic circuit is closed by a backing steel strip 43. In a modification to Fig. 5 the electromagnet is secured within a non-ferrous closed container Fig. 6 (not shown) substituted for the alumium bridge member 35. In the embodiment shown in Fig. 7 the electromagnet consists of a steel strip 4<SP>6</SP> having a horizontal vibrator portion movable adjacent the top of an enclosing ferrous canister 45 which has perforations outside the main flux path so that flux diverted from the latter is a minimum. A magnetic circuit closing backing strip (not shown) similar to 43 in Fig. 5 is provided; these backing strips may be hingedly mounted in the device.
Patent GB-845150-A (GB)
Title: Fluid-actuated mechanism
IPC: F15B15/14
Filed: 1958-04-30
Abstract: 845,150. Fluid-pressure presses. TALLIS, C. E. April 24, 1959 [April 30, 1958], No. 13687/58. Class 122 (3). [Also in Groups XXVIII and XXIX] A fluid-actuated mechanism for producing a rapid approach movement of a tool, such as a die, or workpiece at a low pressure, followed by a shorter high-pressure movement comprises a first cylinder 2 coaxially connected to a second cylinder 3 of larger diameter, a piston 4 in the first cylinder having a rod 5 extending into the second cylinder, a spring-loaded piston 10 in the second cylinder arranged to be clutched to the rod when moved against its spring loading, an inlet 9 for fluid pressure to one end of the first cylinder, and means including a spring-loaded relief valve 21 interconnecting the end of the first cylinder with the corresponding end of the second cylinder whereby when the pressure in the first cylinder exceeds a predetermined value, the fluid pressure will be admitted to the second cylinder to move the second piston in opposition to its springs and to be clutched to the rod. The fluid, which may be air, is supplied through the inlet 9 to the space above the piston 4 to raise the cylinder 2 which carries the tool or workpiece, the rod 5 being secured to a fixed support 7. When the tool engages the workpiece, the pressure in the space above the piston increases to operate the valve 21 and connect the inlet 9 to a pipe 18 leading to the cylinder 3 and close a return pipe 19a. Pressure in the cylinder 3 moves the piston 10 downwardly against the springs 11 and a tapered member 12 carried by the piston contracts a split collet 14 to clutch the piston to the rod 5, further fluid supplied to the cylinder 3 moving the cylinders upwardly at a higher pressure. The cylinders are returned to their initial positions by connecting the inlet 9 to exhaust and supplying fluid pressure to the lower face of the piston 4 through a passage 8. The upward movement of the collet in the cylinder 3 is limited by pins 16 which engage the collet and end wall of the cylinder and serve to prevent the collet sticking to the rod when in its free condition. In an alternative arrangement, the cylinders are secured to the fixed support and the tool or workpiece carried by the piston-rod.
Patent GB-131457-A (GB)
Title: Improvements in Railway Sleepers.
IPC: E01B3/36
Filed: 1918-08-23
Abstract: 131,457. Morton, B. Aug. 23, 1918. Sleepers, composite; sleeper materials. - Sleepers are made from blocks a of clay, shale, concrete, or waterproof composition, &c., reinforced by longitudinal metal rods c with transverse lacings, ties, or plates d between the blocks a. The blocks are connected by cement mortar &c., and may be made of such a size that all the holes for the bolts securing the rails or chairs come either central to the blocks or between them. These holes may be lined with wood or with cement mortar, and may have an expanding screwed brush d<1>, Fig. 14. The rods c may be straight or of hair-pin shape. The Provisional Specification describes also the use of blocks with stepped or joggled faces.
Patent GB-669586-A (GB)
Title: Improvements in watch or clock movements with manual and automatic winding mechanism
IPC: G04B7/00
Filed: 1949-05-24
Abstract: 669,586. Clocks and watches. UHRENFABRIK ETERNA AKT.-GES. May 24, 1949 [Aug. 5, 1948], No. 13808/49. Class 139. Winding means for watch or clock movements with manual and automatic winding mechanisms is characterised in that a first gear wheel is mounted on a swing-out lever, and that the longitudinal axis of the lever and the connecting line between the centres of the first wheel and of a second wheel which is common to both winding mechanisms and is in meshing engagement, during manual winding, with the first wheel form an angle measured in the direction of rotation of the first wheel, which is smaller than 180 degrees there being elastic means provided which ensure engagement of the two wheels on the latter being at rest. The manual winding gear train includes pinion 1, gear wheel 2 and gear wheel 5. An oscillating weight (not shown) transmits motion through gearing (not shown) to the gear wheel 5. The gear wheel 2 is carried by a pivoted lever 3. During manual winding the forces acting on the lever 3 through the gear 2 produce a resultant force acting in such a direction as to keep the gear 2 in mesh with the gear 5. During automatic winding however the resultant force acting on the gear 2 overcomes the pressure of the spring 8 to disengage wheels 2 and 5.
Patent GB-514535-A (GB)
Title: Improvements in or relating to the manufacture of mercaptals and mercaptols
Filed: 1938-05-09
Abstract: 514,535. Making dispersions. DEUTSCHE HYDRIERWERKE AKT.-GES. May 9,1938, No. 13816. Convention date, May 7, 1937. [Class 1 (i)] [Also in Group IV] Primary aliphatic or carbocyclic mercaptans containing at least eight carbon atoms are condensed at a temperature below 100‹C. in the presence of an acid with oxo compounds, acetals or carboxylic acid esters of aldehyde hydrates. The resulting high molecular mercaptals and mercaptols both as produced and after the introduction of hydrophile groups are stated to be dispersing agents. In examples : (1) cetylmercaptan is condensed with paraformaldehyde ; (2) octylmercaptan is condensed with monochloracetal: the chlorine atom may be replaced by the sulphonic acid group ; (3) dodecylmercaptan is condensed with glucose: the product emulsifies organic liquids, fats, oils and waxes in water or aqueous solutions ; (4) octadecylmercaptan is condensed , with levulinic acid and with nitrobenzaldehyde. The chains of the aliphatic mercaptans may be interrupted by O, S, NR, CO, SO2, COO, CONR or SO 2NR (R' being hydrogen or a hydrocarbon residue) and the oxo compounds may contain substituents such as halogen and nitro, hydroxyl, amino, quaternaryammonium, ether, carboxyl, sulphonyl, sulphonic, mercapto and sulphide groups. The following components are specified:-2-decahydronaphthylmercaptan, 1-2-naphthylmercaptan, 1-menaphthylmercaptan, montanylmercaptan, tetrahydromenaphthylmercaptan, 9-mereaptomethyl-octohydroanthracene, acetaldehyde, crotonaldehyde, glyoxal, acetone, palmitone, stearone, mesityloxide, acetylacetone, cyclohexanone, acetophenone, stearophenone, benzophenone, cinnamicaldehyde, methylal, ethylal, acetal,' ethylidenediacetate, aldol, acetonylcarbinol, acetoaceticester, benzoin, phenoxyacetone, o-benzoylbenzoic acid, p-tolylacetonylsulphone, benzaldehyde-m-sulphonic acid, dichloracetal, chloral, monochloracetone and w-chloracetophenone. Specification 492,938, [Group IV], is referred to.
Patent GB-255591-A (GB)
Title: Improvements in chain sprockets, belt pulleys and the like
IPC: B62M9/10
Filed: 1925-05-27
Abstract: 255,591. Douglas Motors, Ltd., and Pullin, C. G. May 27, 1925. Energy-absorbing elements.- Chain-wneels, belt pulleys, and other members formed in two parts, the inner 2 of which is cylindrical and may be used as a brake drum and the cuter 6 is of L- or T-section, have the parts rigidly secured together by soldering and shrinking. For this purpose, two different solders are used on the two parts, that on the outer having the higher melting point, so that when the parts are treated, as by dipping, with melted solder, the temperature of the outer part is the higher and the parts can be shrunk toegther at the same time that they are soldered.
Patent GB-456513-A (GB)
Title: An improved process for the purification of silica
IPC: C03C1/02
Filed: 1935-05-07
Abstract: Siliceous materials such as quartzite, quartz rock, gravel, sandstone, and silica sand are purified by a process in which the materials are heated at 500--650 DEG  C., in an atmosphere of town or coal gas, cooled, subjected to treatment with acid, washed to remove the acid, and then, if desired, heated to redness in an oxidizing atmosphere.  The initial materials may be washed to remove clay and like impurities.  Before the material enters the furnace for the treatment with coal or town gas it may be admixed with carbon and/or a suitable sulphate, e.g. ammonium sulphate, ammonium phosphate, or a suitable oxalate, e.g. sodium hydrogen oxalate, or a combination of such salts, or with dilute sulphuric acid with or without carbon. The heat treatment may be conducted in a three compartment furnace of which the two lower compartments are muffled or in a muffled multiple shelf furnace provided with multiple rakes.  The cooling may be effected by quenching with water to which acid or alkali may be added; or the cooling may take place in an atmosphere of coal gas. Prior to the acid treatment the cooled product may be crushed and/or subjected to a magnetic treatment.  Hydrochloric, nitric, or preferably sulphuric acid of 18,3--26,4 DEG  B<\>ae. may be used in the acid treatment which is preferably conducted at the boiling point, say 105--108 DEG  C.  The washing to remove acid may be by means of an alkali wash followed by washing with water.  The final product may be subjected to a second acid treatment in which one or more acids may be used to which may be added, if desired, salts such as sodium chloride, sodium nitrate or ammonium chloride.
Patent GB-637660-A (GB)
Title: Improvements relating to carriers for braiding machines
IPC: D04C3/00
Filed: 1947-05-23
Abstract: 637,660. Braiding-machines. CARTER & CO., Ltd., B. & F., CARTER, B., and CARTER, E. May 23, 1947, No. 13855. [Class 74 (i)] The pressure of an end 10b of a spring 10 on a thread tension compensating lever 8 can be varied, to suit the thread concerned, by rotating the spring spindle 9, by a milled knob 12a, through worm and worm-wheel 12, 11 and so winding or unwinding the other coiled end of the spring. As the lever 8 is rotated by increasing or decreasing tension of the yarn, passing through its eyelet 8b, an eccentric portion on its spindle 7 moves a brake member 16 away from or towards a flange depending from the base 6a of a rotatable removable cop holder 6. Guides 8b, 14, 15 are chromium plated to reduce the tendency of the yarn to " fluff." The engaging parts of lever, spring and brake member are so shaped as to form between them cavities which open and close, to spread grease, as the parts move relatively to one another. Specification 591,833 is referred to. The Provisional Specification refers also to Specification 602,167.
Patent GB-591534-A (GB)
Title: Improvements in and relating to catamenial tampons
IPC: A61F13/20
Filed: 1943-08-25
Abstract: 591,534. Catamenial tampons. SMITH & NEPHEW, Ltd., T. J., LOVATT, S., and BURLEY, D. W. Aug. 25, 1943, No. 13878. [Class 81 (ii)] Catamenial tampons are made as described in Specification 568,042 except that the line of stitching 26 passes only through the overlapping ends of the fabric sleeve 21, and not through the absorbent material 20. The ends of the sleeve may be turned in as shown in Figs. 13 or 15 before doubling over the cord 23. The tampons may be compressed as described in Specification 520,209.
Patent GB-820273-A (GB)
Title: Improved process for the manufacture of threads, fibres, films, foils and like products from viscose
IPC: D01F2/10
Filed: 1956-05-04
Abstract: Threads, films and like products are made from viscose containing in solution one or more products obtained by the reaction of amines with epoxyalkanes in a ratio of at least 4 molecules of epoxyalkane per amino group.  The viscose is extruded into an acid bath containing more than 3% by weight of a zinc salt, the ratio of the percentage by weight of acid in the bath and the percentage by weight of alkali in the viscose lying between 1.3 and 0.8, and the resulting products are stretched. Suitably, the viscose contains more than 0.1% of one or more compounds of the formula <FORM:0820273/IV (a)/1> where R1 is an aliphatic, alicyclic or heterocyclic group and R2 and R3 are alkylene oxide chains of the formula (CnH2nO)xH, where x and n may be different for R2 and R3, but x should be at least 4 in the case of R2 and at least 1 in the case of R3.  Other suitable additives are specified.  The spinning bath may also contain other salts, e.g. sodium or magnesium sulphate.  Examples are given.
Patent GB-719967-A (GB)
Title: Axial-flow blower
IPC: F04D29/36
Filed: 1952-06-03
Abstract: 719,967. Axial-flow blowers. NORDISK VENTILATOR CO., AKTIESELSKAB. June 3, 1952 [June 4, 1951], No. 13985/52. Class 110(1) In an impeller for axial-flow blowers and the like, having impeller blades each adjustably rotatable about its longitudinal axis, each blade is provided with a weight for approximately balancing the turning moment about the axis due to centrifugal force acting on the blade, the weight being disposed within the outer surface of the impeller hub. In the construction shown in Fig. 3, balancing weights 10 are carried by arms 11 projecting from the root pin 9 of each impeller blade 7. In a modification, the weights 10 are attached to the root plate 8.
Patent GB-235000-A (GB)
Title: Improvements in or relating to printing formes
IPC: B41L15/06
Filed: 1924-06-10
Abstract: 235,000. Wade, H., (American Multigraph Co.). June 10, 1924. Printing-surfaces; holders for loose types and type-bars; type-bars.- A printing-forme for a rotary printing-drum comprises one or more printing strips with embossed printing characters, formed to engage rows of circumferential projections on a holder adapted to be secured to the drum. The projections 25, Fig. 2, are stamped up from a sheet metal base 20, and are cut away at the sides to form slits 26 adapted to be engaged by the inturned edges 33, Fig. 1, of the printing-strips 30. Notches 34 may be formed in the edges 33 to facilitate bending of the strips and a stop lug 36 may be formed at one end. The forme may be clamped to a plain drum or to a drum having type-holding rails 14<1>, Fig. 4, formed integrally with the drum, or rails 14, Fig. 8, formed by bending ,a sheet metal plate. The clamping is effected at each end by a strap 22, Figs. 3 and 4, engaging a lug 21 on the base 20 and carrying a lever 23 adapted to engage one of the rails or a notch in the drum. Specification 215,040 is referred to.
Patent GB-1405175-A (GB)
Title: Apparatus for use in salvaging fluid and fluidisable substances from sunken ships
IPC: B63C11/00
Filed: 1972-03-24
Abstract: 1405175 Drilling submerged work SALVAGE OIL SYSTEMS Ltd 21 March 1973 [24 March 1972] 14091/72 Heading B3C [Also in Divisions F2 and B7] Apparatus to recover oil and petroleum products from a closed compartment of a sunken ship 12 and transfer them to surface containers for removal to shore comprises a recovery capsule 10 capable of being lowered from a recoverysupply vessel 11 on the surface to the sunken ship. Remotely controlled electromagnets 33 and anti-slip pads 34 securely but detachably attach the capsule to the sunken ship and there is holding chamber 40b in the capsule. Remotely controlled drill mechanism 42 and cutting head 69 provide access from within the holding chamber to the closed compartment and remotely controlled pump 100 removes the said products from the compartment into the holding chamber. Main oil pump 94 then removes the products to the surface containers by line 96 which passes through service line 13. The operation of a plug 169, insertion mechanism in conjunction with a cutter head 79 is shown in Figs. 15, 16, 17. In Fig. 18 plug 87 is positioned for injection of steam through conduit 174.
Patent GB-121757-A (GB)
Title: Improvements in or relating to Vehicle Wheels.
IPC: B60B1/00
Filed: 1917-09-29
Abstract: 121,757. Dunlop Rubber Co., and Macbeth, C. Sept. 29, 1917. Detachable-rim attachments to wheels.-Wheels are constructed with oppositely dished disk or spoke members which are expanded radially, by axially applied pressure, to cause the rim to grip the base of a band tyre (or tyres), or a detachablerim carrying a pneumatic tyre. The wheel rim may be in one piece or divided circumferentially, and in the latter case the abutment of the rim halves with one another, or with stops on the tyre base or rim, is effected before the expansion of the spokes, &c. In the form shown in Figs. 1 and 3, the disk members B, formed with bosses B' to engage the hub-shoulders A<1>, A<2>, are clamped by bolts D to expand the rim portions B<3> into engagement with the base of a band tyre C. Fig. 8 shows a modification in which bowed disks B, or a one- or two-piece hub B<7>, are formed with sleeves B<9> for the thrust bolts D. The sleeves may be formed as separate members threaded on the bolts to equalize the thrust around the wheel. Either the wheel rim or the tyre base (or its rim) may be formed with positioning-stops. The wheel may be provided with flanges Bx to prevent damage by curbs.