baber/WOPTO huggingface dataset:
Patent GB-153582-A (GB)
Title: Improvements in electrical speed regulator systems
IPC: H02P5/50
Filed: 1920-11-08
Abstract: 153,582. Metropolitan-Viewers Electrical Co., (Assignees of Staege, S. A.). Nov. 6, 1919, [Convention date]. Systems for continuous-current motors only; systems depending on use of two or more motors; motor running synchronously with source of constant frequency.-A constant speed ratio is maintained between two or more electric motors by providing each motor with a controller, the operation of which is dependent upon the frequency of an alternating current, which frequency is dependent upon the speed of the motor and of a clock mechanism, and upon a standard-frequency alternating current. The speed of the motors may be varied, without altering the ratio, by varying the excitation of the generator supplying them, and the standard frequency may be varied by varying the speed of the machine supplying it. A motor 5 drives a paper roll 1 and the armature 21 of an alternating generator 20. The armature 21 is connected to the primary winding 26 of a frequencychanger 24, the secondary winding 25 of which is driven by a clock mechanism 27 and is connected to the primary winding 45 of a motor 44. The secondary winding 46 of the motor 44 is connected to the winding 39 of a frequency-changer 36, the primary winding 37 of which is connected to alternating current mains 38. The winding 39 is driven by a clock mechanism 27 and is connected frequency. Under normal conditions, the frequencies of the currents supplied to the windings 45, 46 of the motor 44 are equal and the rotor is at rest. Upon a variation of speed of the roll 1, the frequency of the current supplied to the winding 45 is varied and the motor 44 operates to move, through a friction clutch, the contact-arm 47 of a relay 47<1>. According to the direction of variation of the speed of the roll 1, the contact 49 engages contacts 52 or 53 to control the direction of rotation of a reversible motor 54 which operates a rheostat 11 in the field circuit of the motor 5. To prevent hunting of the rheostat 11 and sticking of the contacts 49 upon the contacts 52 and 53, the arm 47 is provided with an additional contact 48 adapted to engage contacts 50, 51. When contact 49 engages contact 53, the contact 48 engages contact 51 to energize a magnet 61, through a delay inductance 68, from a 'battery 67. The armature 63 of magnet 61 is provided with a projection 64 through a slot in which the arm 47 passes. When the magnet 61 is energized, the armature 63 is attracted against a biassing spring 66 to disengage contacts 49, 53 and contacts 48, 51. The motor 44 again operates the arm 47 to cause the engagement of contacts 49, 53 if the motor 5 is still not running at its correct speed. A magnet 62, operating in a similar manner to the magnet 61, is employed to disengage contacts 49, 52. The speed of a motor 6 during a roll 2 is controlled similarly by means of a motor 70 and a rheostat which is not shown.
Patent GB-1222087-A (GB)
Title: Thyristors
Inventor: STACEY MICHAEL ALBERT
IPC: H01L21/205
Filed: 1967-07-10
Abstract: 1,222,087. Thyristors. JOSEPH LUCAS (INDUSTRIES) Ltd. 5 July, 1968 [10 July, 1967], No. 31629/67. Heading HlK. A thyristor is made by placing a P-type silicon wafer, to form the anode, in a non- oxidizing atmosphere in a heated furnace, depositing donor doped silicon from a gaseous mixture to form a base layer and then changing the impurity in the mixture and growing a gate layer, and finally forming a cathode region in the gate layer by diffusion after removal from the furnace. In the example a wafer of 0.01 ohm cm. resistivity is etched in a gaseous hydrogen chloride-hydrogen mix immediately prior to deposition, which is effected from a mixture of silane and hydrogen with phosphine and diborane added to form the base and gate, respectively, the concentration of diborane being increased at the end of deposition to provide a P + surface to the gate. At this stage the wafer is oxide coated by replacing the diborane with nitric oxide and holes photolithographically formed in the oxide (15) overlying the gate. Phosphorus is diffused through these to form a group of cathode regions (17, Fig. 6) for each device. Gate and cathode contacts are made through apertures formed in the oxide and grooves etched down to the anode layer to isolate single device configurations which are then separated by scribing and breaking. The resistivities and thicknesses of the various layers and sub-layers in two exemplary devices are given.
Patent GB-442913-A (GB)
Title: Improvements relating to work holders for use in electro-plating and like operations
IPC: C25D17/08
Filed: 1934-11-05
Abstract: 442,913. Electroplating ; cleaning metals. CANNING & CO., Ltd., W., and POUGHER, C. F., 133, Great Hampton Street, Birmingham. Nov. 5, 1934, No. 31706. [Class 41] [See also Group II] Small articles such as screws i to be plated or cleaned are held between pairs of radial resilient arms f mounted on a metal rod a and spaced by members e. Spacing members k are mounted between successive pairs. The rod a may be of polygonal section and two oppositely extending arms f may be made in a single piece with a central hole to fit the rod. Several arms may be mounted in the same plane and adjacent sets of holders may be staggered. The holder is suspended by a hook c which may be provided with a blade spring d. In a modification the pairs of resilient arms engage the inside of an object such as a nut.
Patent GB-1007811-A (GB)
Title: Electrical connector element
IPC: H01R12/72
Filed: 1964-08-05
Abstract: 1,007,811. Two-part couplings. A.M.P. Inc. Aug. 5, 1964 [Aug. 5, 1963], No. 31736/64. Heading H2E. A conductive connector element has one or both of its edges bent round at 54, 74, 76, 78 or 54, 75, 77, 79 (Fig. 5) to form one or two socket portions each adapted to receive a blade 140 (Fig. 4) of a male contact which is retained when in position by a locking tongue 168 and is pressed on by a spring contact tongue 120. Fig. 2 shows the element in position in a connector body 10 receiving a printed circuit panel 110 between spring contact members 88 and with a projection 32 (Fig. 1, not shown) on a side wall of the connector body fitting into a channel 56 in the element between the socket portions and engaged at its ends by a holding tongue 58 and an end wall 68 of the element. In a further embodiment (Fig. 10) each connector element has only one spring contact member 280, which engages one side of a printed circuit board, each connector element being retained in a cavity 186 or 188 separated by a wall 210, by locking tongues 254. Aperture 220 permits access of a tool (Fig. 17, not shown) for removal of the element. Leads attached to the male connector 308, Fig. 14 (not shown), may be connected by inserting the latter into the sockets of an integral row of connector elements 300, mounted in an insulating body, all the receptacles being accessible from the same side of the body.
Patent GB-244782-A (GB)
Title: Manufacture of azo-dyestuffs
IPC: C09B35/21
Filed: 1925-12-16
Abstract: Azo dyes are obtained by coupling with the usual components tetrazo compounds of chlorosubstituted 4 : 41-diaminodiphenylmethanes or homologues thereof.  Some of the products may be further diazotized and coupled with other components, or they may be further coupled with diazo compounds. Some of the dyes dye wool in varied shades fast to washing, fulling, and sulphur; others dye cotton, while some are applicable as lake or pigment dyestuffs.  According to examples, tetrazotized 4 : 41-diamino-3 : 31-dichlorodiphenylmethane is coupled with 2-naphthol-4-sulphonic acid, 1-naphthol-3 : 8-disulphonic acid, 1-acetamino - 8-naphthol - 3 : 6-disulphonic acid, 2-naphthylamine-6-sulphonic acid, 1-(21-chlor-51-sulphophenyl)-3-methyl-5-pyrazolone, or b -naphthol. A table is given showing the properties of the wool dyestuffs obtainable from 4 : 41-diamino-3 : 31-dichlordiphenylmethane and 2-naphthol-4-, 6-, or 8-sulphonic acid, 1-naphthol-4- or 5-sulphonic acid, 1-naphthol-3 : 6-, 3 : 8-, or 4 : 8-disulphonic acid, 2-naphthol- 3 : 6-disulphonic acid, chromotropic acid, ethylchromotropic acid, 1-amino-8-naphthol-4-sulphonic acid, 1-phenyl-3-methyl-5-pyrazolone sulphonic acid; 4 : 41-diamino - 3 : 31 : 6 : 61 - tetrachlordiphenylmethane or 4 : 41-diamino-3 : 31-dimethyl-2 : 21-dichlordiphenylmethane and 1-(21-chloro-51-sulphophenyl)-3-methyl-5-pyrazolone. The following cotton dyestuffs are mentioned:- disazo dyes from 4 : 41-diamino-3 : 31-dichlordiphenylmethane and 2 mols. 1 : 8 : 3 : 6-acid or 2 : 5 : 7-acid (alkaline coupling), or 1 mol. 1 : 8 : 3 : 6-acid (acid coupling) and 1 mol. 2-naphthol (alkaline coupling): tetrakisazo dyes by coupling the tetrazo compound with 2 : 5 : 7-acid, rediazotizing, and coupling with phenyl-2 : 5 : 7-acid; or by coupling the tetrazo compound with 1 : 8 : 3 : 6-acid (acid or alkaline coupling), rediazotizing and coupling with diazotized 4-nitraniline (alkaline or acid coupling).  Lake dyestuffs are described from 4 : 41-diamino-3 : 31-dichlorodiphenylmethane and 2-naphthol, 2-naphthol-3-carboxylic acid or the anilide thereof, or 1-phenyl-3-methyl-5-pyrazolone. Chloro - 4 : 41-diaminodiphenylmethanes and homologues thereof are obtained by condensing the corresponding chloranilines with formaldehyde and converting the methylene compound so produced into the diarylmethane derivative by the action of a salt of a primary arylamine in presence of acid.
Patent GB-1436995-A (GB)
Title: Purification of graphite to produce pure nuclear-grade graphite
IPC: C01B31/04
Filed: 1974-07-18
Abstract: 1436995 Purifying graphite HOBEG HOCHTEMPERATURREAKTOR - BRENNELEMENT GmbH 18 July 1974 [23 July 1973] 31798/74 Heading C1A A process for purifying graphite comprises treating the graphite at elevated temperature with ammonium and/or an alkali metal hydrogen difluoride as an aqueous solution or in dry form, contacting the mixture with water when the dry form is used, and then separating the solution containing impurities. In one embodiment, the graphite is in an aqueous suspension or the hydrogen difluoride is in an aqueous solution and after contact the solution containing impurities is filtered off or decanted, the wet graphite is washed free of acid and then dried. In another embodiment, the graphite is mixed in powder form with dry hydrogen difluoride to obtain a uniform distribution, the mixture is heated to 125‹ to 240‹ C., cooled below 100‹ C., and washed with water to remove salts and other disassociation products. The process may be combined with other treatments, e.g. with an alkaline or alkaline-earth metal salt and/or with an acid to effect further purification. Unused hydrogen difluoride is preferably recovered and after purification recycled. The process is particularly useful for purifying graphite for use in nuclear fuel elements.
Patent GB-968189-A (GB)
Title: Arrangement for determining radiation
Inventor: SCHWAAR LOTHAR
IPC: G01T1/02
Filed: 1960-09-15
Abstract: 968,189. Radiation dose effect determination. VAKUTRONIK VEB. Sept. 15, 1960, No. 31801/60. Heading G1A. [Also in Division H5] The dosage effect of radiation such as # or gamma radiation having a varying energy spectrum is measured by a detector through an intervening layer having a varying absorption over its surface of the incident radiation; measurements are made with and without the absorption layer. The layer may be wedge-shaped, so that an increasing proportion of the high energy radiation is absorbed by the thicker parts of the wedge. Thus the comparison measurement made takes account of the energy, as well as the density, of the radiation. Fig. 2 shows two bell-shaped counter tubes 1, 2, the entry window of tube 2 being covered by a lens-shaped absorber screen 3. In the arrangement of Fig. 3 the anode wire 5 of the counter tube is divided into two parts by a glass bead 7. Thus the tube is in effect divided into two sections, an upper part without any absorbing layer, and a lower part surrounded by the frusto-conical layer 8, so that the two measurements can be made with a single tube. In the arrangement of Fig. 5 (not shown) the absorber is in stepped formation. Instead of having a varying thickness, the absorber layer may be of varying density. Further, the absorber area may be subdivided into a number of part areas, each acting as a separate variable absorber.
Patent GB-1299428-A (GB)
Title: Volumetric meter
Inventor: HANSEN WILLIAM ARMSTRONG
IPC: G01F11/04
Filed: 1970-07-01
Abstract: 1299428 Dispensing measured quantities of liquids W A HANSEN 1 July 1970 [4 Aug 1969] 31823/70 Heading B8N A free piston type liquid dispenser comprises a tube 14, e.g. of glass closed at its ends by an end cap 16, e.g. of stainless steel or plastics and a head cap 18, e.g. of stainless steel, brass or plastics to form an enclosed space for piston 22. The head cap comprises a stationary member 62 and a member 64, movable relative to member 62 between two portions defined by shoulders 74 to be contacted by handle stem 78, and a valve disc 63 fixed relative to either of the members 62, 64 As illustrated the valve disc 63 is preferably coated with P.T.F.E. and has rubber seals on its face engaging the stationary member 62. In one position of member 64 liquid flows via inlet 80, ports 84 and 86, conduit 88, ports 90 and 92, conduit 38, port 32 and conduit 34 into chamber 40, and is simultaneously dispensed from chamber 42 via ports 94 and 96, conduit 98, ports 100 and 102 and outlet nozzle 104. In the other position liquid flows via inlet 80, ports 84 and 90, conduit 88, and ports 86 and 110 into chamber 42, and is simultaneously dispensed from chamber 40 via conduits 30 and 36, ports 108 and 100, conduit 98, ports 96 and 102 and outlet nozzle 104. The dispenser includes a second tube 12 concentric with the tube 14 so as to define an annular space 44 therebetween through which a coolant or a heating medium may flow via an inlet 50 and an outlet 52. The inlet 50 is connected to a pipe 46, e.g. a plastics tube having a bent end. The piston comprises two halves screwed together. To vary the volume dispensed, spacers can be placed between the two halves. The dispenser may include a counter for registering the number of measurements dispensed.
Patent GB-1506445-A (GB)
Title: Work-hardened wire or profile of reinforced thermoplastics material
IPC: B29C48/06
Filed: 1975-07-30
Abstract: 1506445 Work hardening extruded reinforced thermoplastics BASF AG 30 July 1975 [31 July 1974] 31862/75 Heading B5A [Also in Division E1] A work hardened wire or profile is made by mixing a molten thermoplastics material with reinforcing aluminium needles in a screw extruder, from which the wire or profile is extruded with the needles axially oriented and is then hardened by cold working. The needles are preferably treated with hydrochloric acid to remove oxide, and comprise 5 to 40% by weight of the mixture, are of a length of 0À3 to 6 mm. and of average diameter of 0À02 to 0À1 mm., and are of a ratio of length to average diameter of 3 : 1 to 100 : 1, preferred ranges of these parameters being specified. The thermoplastics may comprise polyvinylaromatics, polyvinyl halides, polycarbonates, saturated polyesters, polyacetals, polyolefins such as polyethylene of 0À94 to 0À97 gm./cm.<SP>3</SP> density, and specified polyamides. The examples relate to Nylon 6, with mechanical properties of the reinforced and unreinforced material compared. The screw of the extruder A discharges the mixture through an annular gap B and, via a flow constriction C, to a die D from which the wire or profile is drawn by means J through a cooling ring E, a cooling zone F, a drawing die G in which the cold working is effected, and an annealing zone H. Cold rolling may be effected prior to, or after the die G. The extruder screw comprises a flight depth at its inlet and outlet ends which is respectively of 1À2 to 1À5, and 0À4 to 0À8 times the length of the aluminium needles. The cooling zone F comprises sequential temperature controlled zones of which the upstream zone is at least 20 C. below the crystallile melting point of the thermoplastics, and the subsequent zones are of temperature such that the extrusion is cooled to not above 50 to 60 C. The die G effects a drawing of 2 to 10 times and, for wires, comprises a conical entry of 30 to 90 degrees, a cylindrical shaping passage of a length of 0À1 to 0À4 of the wire diameter, and a conical outlet of 3 to 10 degrees.
Patent GB-826714-A (GB)
Title: Improvements in or relating to the etching of printing plates
IPC: C23F1/00
Filed: 1957-10-11
Abstract: 826,714. Etching. DORO, L. H. Oct. 11, 1957, No. 31868/57. Class 100(2) A process of preparing a printing plate comprises photographically preparing a resist on the image portion of the plate, completely immersing the plate in an etching bath and, during the immersion, affecting continued relative movement between the surface of the plate and the etching fluid by continuously rotating the plate in the bath for specified periods first in one direction and then in the other until the desired degree of etching has been obtained. Apparatus for carrying out the process comprises a disc 13 on a shaft 14 rotatable in a bath 10 containing the etching fluid 11, the plate 12 being attached to the disc 13. The shaft 14 is attached to one end of a leg 15 the other end of which is attached to an arm 16 hinged at 17 to a block 18 carried by a turntable 19 on a table 21. The shaft 14 has a pulley 27 around which runs a belt 28 which passes over a further pulley 29 on a shaft 30, passing through the upper lid of the leg 15 and carrying a handle 34. A core 25 is secured to the leg 15. The tank is provided with an exhaust valve 35 for removing gases. The etching fluid may consist of hydrochloric acid of a strength 1‹ Baume to 11‹ Baume depending upon the temperature of the bath, a range of 40‹F. to 105 ‹F. being possible. Preferably the acid is 4‹-6‹ Baume at a temperature of 70‹-80‹F. A quantity of papermakers' alum (aluminium sulphate) may be added to the bath. The disc 13 is caused to rotate at about 35 r.p.m. with a reversal of rotaevery 5 secs., the time taken to etch depending upon the depth of etch required. It is stated that the resulting printing or unetched areas have the shape of fillets and exhibit no overhang. If sulphuric acid is used in the bath, preferably at a concentration of 14‹ 20‹ Baume at 80‹F., it is stated that around the base of the fillet a tiny moat or groove appears. After etching the arm 16 is raised to lift the disc 13 and plate 12 out of the etching bath and to rotate on the table 21 until it lies over a first wash tank. The arm 16 is then lowered to immerse the plate in the wash tank and the operation repeated over a second wash tank.
Patent GB-225714-A (GB)
Title: Improvements in dust separating apparatus
IPC: B01D45/14
Filed: 1923-12-19
Abstract: 225,714. Simon, Ltd., H., and Hughes, A. T. Dec. 19, 1923. Density separators.-Dust-laden air enters the end b of the apparatus with a whirling motion and passes through a rotating chamber a, which is cylindrical or conical. The cleaned air is discharged through a pipe c while the dust impinges upon an axially disposed plate g and collects in a chamber d from which it is discharged by a worm conveyer i. In a modification, an inner concentric rotating member is fixed to the chamber a and the air passes between the two cylinders.
Patent GB-1081055-A (GB)
Title: Improvements in or relating to pharmaceutical preparations comprising acetylsalicylicacid
IPC: A61K33/10
Filed: 1965-07-27
Abstract: Dry analgesic and anti-inflammatory pharmaceutical compositions comprise aspirin, urea and a CO2-producing material e.g. NaHCO3 or KHCO3 and citric, tartaric or ascorbic acid.  Conveniently, the ingredients may be in two sachets (one containing the acid components) for extemporaneous mixing.
Patent GB-730676-A (GB)
Title: Improvements in or relating to fire-grates
IPC: F24B1/193
Filed: 1952-12-17
Abstract: 730,676. Grates. HARLING, W. E. April 29, 1953 [Dec. 17, 1952], No. 31945/52. Class 126. A fire grate with bars extending from back to front comprises two side portions pivotally supporting a further portion for movement about a transverse horizontal axis. Fixed side portions 8, 9 support a central portion 11 on spindles 12 near the front of the grate so that the rear of central portion 11 may be raised to allow access to a flue 16, Fig. 2, below a boiler 17 at the back of the fireplace. A cranked handle 19 engages a bore in a lug 18 extending from the central portion 11 below a bar 10 joining the side portions 8, 9 of the grate. The handle 19 and the bore are of irregular cross-section to locate the handle in the correct position. The firebars 2c at the sides of the central portion 11 are deeper than the other firebars to prevent fuel falling from the side portions 8, 9 when the rear of the central portion 11 is raised. Lugs 29 are provided at the front of the side portions 8, 9 to maintain the centre portion 11 horizontal, and lugs 30, Fig. 2, extending from the rear of the side bars 2c of the central portion engage the adjacent bars 2a of the side portions to limit the movement of the central portion. In a modification, Fig. 3, arcuate recesses 22 in the side bars 2c of the central portion engage studs 23 secured to the side portions. A spindle 26 carries a forked lever 24 co-operating with a stud 27 on the side bars 2c so as to rotate the central portion about the studs 23.
Patent GB-267610-A (GB)
Title: Improvements in automatic or semi-automatic telephone systems
IPC: H04Q3/42
Filed: 1925-12-17
Abstract: 267,610. Standard Telephones & Cables, Ltd., (Deakin, G.). Dec. 17, 1925. Addition to 232,726. Semi-automatic exchange systems.-In the system described in the parent Specification, the registercontroller is modified for the control of automatic switches by direct impulses instead of by revertive impulses. An auxiliary sequence switch 261 goes through a cycle for each digit and causes ground impulses to be sent over the selected terminals of the registers to the impulse relay 260, which is connected up at the beginning of the cycle by relay 267. The sequence switch 261 includes a contact 262 controlled by the main sequence switch, which is advanced after each digit by the closure of contact 268.
Patent GB-300241-A (GB)
Title: Improvement in clutches
IPC: F16D45/00
Filed: 1928-11-02
Abstract: 300,241. Laabs, E. H. Nov. 9, 1927, [Convention date]. Clutches, ratchet.-In pivoted-pawl ratchet clutches, particularly applicable for the automatic coupling and uncoupling of a low-speed auxiliary motor to and from a high-speed motordriven machine, such as a printing-press, the pawls 23 have counterweights 35 of such magnitude that weak springs 38 may suffice to hold them in engagement with the lower part of the ratchet wheel 16 against gravity, while centrifugal force will keep them out of action during overrunning at a comparatively low speed of the driven pawl-carrying member 22. As shown, the ratchet wheel 16 is bolted to a slowly-driven wheel 10 mounted on a fixed axle 11 and the member 22 is secured to a shaft 17, which is driven by the high-speed motor 18 and drives the machine, the member 22 carrying also the drum 21 of an electromechanical brake and having a flange 39 against which the pawl-springs 38 bear. The ratchet wheel 16 may have thirtyfive teeth coacting with eight pawls.