baber/WOPTO huggingface dataset:
Patent GB-471950-A (GB)
Title: Improvements in and relating to insulating supports for conductors of electric current
IPC: H01B17/14
Filed: 1936-05-25
Abstract: 471,950. Insulators. SOC. ANON. LE BOIS BAKELISE. May 25, 1936, No. 14791. Convention date, May 25, 1935. [Class 36] An insulating support for electrical conductors consists of a wooden rod 1, which may be lamellated, impregnated with artificial resin, and shaped to provide adjacent its ends frusto-conical portions 6, 7 isolating the extremities 10, 11 of the rod. which carry the conductors, from its central fixing portion 12. The extremities of the rod may have grooves 5 for receiving the conductors and may be reinforced by metal caps 9. The central portion of the rod, which may be of square section, may be formed with passages 3, 4, connected by a channel 2, for receiving and retaining a strap, stirrup, or other fixing or suspending means.
Patent GB-510313-A (GB)
Title: Improvements in or relating to projection screens
IPC: G03B21/56
Filed: 1938-10-11
Abstract: 510,313. Projection screens. HARKNESS, T. S. Oct. 11, 1938, No. 14807/39. Divided out of Complete Specification of 510,298. Drawings to Specification. [Class 97 (i)] A support of closely woven metal fabric such as wire gauze, coated with a surfacing composition or paint to provide a projection surface, and perforated for sound transmission, comprises a number of sections joined by welding or fusing together their adjacent edges; the welding may be effected by the method described in Specification 350,541, [Group XXII]. The paint may be applied after the sections have been welded together and before or after, the screen has been erected in position, and the perforations may be formed before the welding, or before or after the coating. Specifications 499,923 and 510,298 also are referred to.
Patent GB-536208-A (GB)
Title: Improved manufacture of titanium dioxide pigments
IPC: C09C1/36
Filed: 1940-04-24
Abstract: 536,208. Titanium pigments. NATIONAL TITANIUM PIGMENTS, Ltd., WEBER, I. E., and BENNETT, A. N. C. April 24, 1940, No. 14833/39. [Class 95] Titanium di-oxide pigments, which do not discolour in resin media e.g. those of the urea and thiourea type, are prepared by intimately mixing a relatively small proportion of zinc or a zinc compound with a titanium dioxide which has previously been calcined, grinding the materials in the dry state during or after the admixture, and calcining the ground mixture. Specified zinc additions are metallic zinc, and zinc oxide, carbonate, sulphate, chloride, nitrate, fluoride and oxalate. The amount of zinc or zinc compound added preferably corresponds with 0.8-2.8 per cent. of zinc, calculated on the titanium dioxide content, and a small amount of an alkali metal salt may be added before the second calcination. The first calcination is preferably conducted within the range 600-900‹C., and the second calcination within the range 850-950‹C. When the titanium dioxide has been prepared from a titanium salt solution, by hydrolysis, it should be subjected to an intensive washing, in addition to the normal washing, before its first calcination. The titanium di-oxide used may be contained in a composite pigment of titanium di-oxide and barium sulphate or calcium sulphate. Examples are given.
Patent GB-828044-A (GB)
Title: Improvements in or relating to machines for cutting and folding tabs
IPC: D05B3/20
Filed: 1958-05-09
Abstract: 828,044. Folding edges of sheet material. SCHMIDT, O. May 9, 1958, No. 14835/58. Class 42 (1). Apparatus for cutting and folding over a tab or tape for use with a machine for stitching in the tab comprises an upper plate 5 movable relatively to a base-plate 6, the plate 5 carries a knife 1 and plates 8 for holding down the material, the knife 1 co-operating with a cutting block 2 mounted on the base-plate 6. The material is folded over the plates 8 by means of rollers 3 provided with gear-wheels which are rotated by means of a double rack formed on a bar 13. Adjacent to the material the rollers 3 are cut away so that a 90 degree segment is left one of the remaining surfaces lying in the same plane as the base-plate 6. The block 2 and rollers 3 may be brought to ironing heat by any known heating arrangement.
Patent GB-1137295-A (GB)
Title: Improved free-machining ferritic stainless steel
Inventor: KOVACH CURTIS WALTER
IPC: C22C38/60
Filed: 1967-03-31
Abstract: 1,137,295. Free machining steel. CRUCIBLE STEEL CO. March 31, 1967, No. 14872/67. Heading C7A. A free machining stainless steel comprises: - Cr 14 - 20% Mn over 1À25 - 3% the balance apart from incidental constituents (e.g. N and P), being iron and has a Mn:S ratio of at least 3 and a Cr equivalent [(Cr + Si + 1À5Mo + 10A1 - Ni - Cu - 30(C+N)], of at least 14. A minor proportion of the sulphur may be replaced by one or more of Pb, Se and Te. The steel may be hot worked (e. g. at 982‹ - 1148‹C.) austenitized at 1010‹C., oil quenched, tempered at a temperature below the A 1  point but as near as possible thereto (e.g. 745‹C. ) and then air cooled.
Patent GB-1177851-A (GB)
Title: Control Circuit for Static Converters
Inventor: HAMMOND ROYSTON ALFRED
IPC: H02H7/122
Filed: 1967-03-31
Abstract: 1,177,851. Static converters; control of D.C. motors. ENGLISH ELECTRIC CO. Ltd. 28 March, 1968 [31 March, 1967], No. 14976/67. Headings H2F and H2J. In a converter for driving a D.C. motor 7 (Fig. 1) there are two thyristor bridges C1, C2 only one of which is conductive at a time depending upon the desired direction of rotation of the motor. Increase of the motor speed is by altering the firing pulses, while to decrease its speed the driving rectifier bridge is blocked and the other bridge is conditioned to invert whereby energy can be absorbed from the slowing motor. When the desired speed is reached the inverting bridge is blocked and the first bridge rectifies again at the appropriate firing angle.  To avoid excess current surges which can arise if the firing pulses are withdrawn from a bridge when inverting, the converter control is provided with sensing means to detect the simultaneous occurrence across all of the thyristors, of voltages, each exceeding a predetermined level, the voltage across a thyristor being greatest when non-conducting. For example, with a D.C. motor load, discontinuous current occurs, causing simultaneous development of voltages across all of the monitored thyristors, as a result of the back E.M.F. of the motor " cyclically " exceeding the mean rectified voltage. See Specification 1,176,484 for fuller details.) Zero current detector.-In Fig. 1 a detector 9 is connected between the three-phase lines and one common D.C. line. Assuming bridge C1 is operating in the inverter mode, it is desired to detect the zero current condition during which firing pulses can be withdrawn otherwise natural commutation would be inhibited and a " follow through " fault condition may result. The detector, as shown, Fig. 2, receives the monitored voltages which are applied via resistors R10 to respective symmetrical Zener diodes ZD1 which detect when the voltages exceed a predetermined level. The direct voltage developed across each Zener diode is applied across two diode bridge switching networks 13, 14 via a centre-tapped primary winding of a transformer T1 Anti-phase A.C. voltages are applied to the diode bridges' diagonals and in the presence of the D.C. inputs are operative to bias the diodes, so that each bridge is " opened " on alternate half-cycles and current will flow in the upper and lower half of each primary alternately. Resultant secondary voltages are rectified and applied to NOR gates N1, N2, N3 having thresholds set by Zeners ZD2 and from thence to a NOR gate N4 together with a signal from a circuit 15 (Fig. 3, not shown) (detailed Fig. 3, not shown) which produces an output to inhibit N4 when the thyristors are normally commutating. On receipt of signals of like sign from N1, N2, N3, N4 signals for the withdrawal of firing pulses if it is not thus inhibited. Alternatively a light emitter may be connected across each Zener diode (Fig. 4, not shown) and co-operates with a photo transistor connected to the appropriate NOR circuit N1 to N3.
Patent GB-1234761-A (GB)
Title: Method and means for preparing lithographic printing plates for a printing press
Inventor: SURBROOK LOUIS MATTHEW
IPC: G03F9/00
Filed: 1967-04-01
Abstract: 1,234,761. Mounting printing plates. LINOTYPE & MACHINERY Ltd. 20 June, 1968 [1 April, 1967], No. 15033/67. Heading B6C. A plate bonding, punching and registration mechanism comprising co-operating rollers 7 and 8, Fig. 2, is used in the preparation of a lithographic printing plate for use in a rotary offset printing press, especially for use on the plate cylinder disclosed in Specification 1,233,893. The upper roller 8 is felt covered and spring urged into contact with the lower roller 7 which comprises inner rotatable core 23 and outer rotatable barrel 17. The barrel 17 carries hole punching and locating devices 39, Fig. 1, associated with respective axially extending slots 21, 22 and operable by manual rotation of the core 23 by an arm 30. The barrel 17 also carries pins in holes 43 which intersect the slots 21, 22 and are used as lateral stops for registration purposes when printing plates are placed in the slots 21, 22. A spring-urged pin 33 is provided to hold the barrel 17 against rotation when necessary and the barrel with the core 23 is rotated by a handle 20. In use the printing plate blank is inserted in the slot 21 and the pin 33 is pushed against the barrel 17 and its mounting to lock it relative to the core 23. The core is then rotated whereby the devices 39 punch holes in the plate blank edge. The blank is then removed and imaged before being inserted into the slot 22 where it is held by the devices 39 engaging the newly cut holes. The pin 33 is released from the barrel 17 and the rollers 7, 8 are rotated by the handle 20 in order to bend the plate to the correct curvature for subsequent fitting to the plate cylinder of the rotary press.
Patent GB-810672-A (GB)
Title: Fluid distributing fire extinguishing system
IPC: A62C99/00
Filed: 1956-05-15
Abstract: 810,672. Fluid-pressure servomotor-control systems. SPECIALTIES DEVELOPMENT CORPORATION. May 15, 1956 [July 22, 1955], No. 15067/56. Class 135. [Also in Group XXI] A fire-extinguishing system comprises carbon dioxide cylinders 10, 11, Fig. 1, which are connected by a discharge conduit 16 and branch lines 17 to zones to be protected. In each line 17 is a stop-valve 19 controlled by a device 22 connected by a line 25 to one or more heat actuators 24. Between each stop-valve 19 and the associated control device 22 is a pulse transmitter 20 connected by a line 21 to the control devices 15 of the cylinders 11. Each device 22 includes a normally latched spring-loaded plunger 39, Fig. 3, which is freed by a diaphragm when one or more of the associated actuators 24 are operated. The plunger 39 moves and pushes a rod 56 to the right to free the connecting rod 55 of a spring-loaded piston 52 located within a cylinder 50. The movement of the rod 56 to the right also opens a pilot valve 47. A cam surface on the rod 56 may close an electric switch to actuate an alarm or indicating device. The piston 52 moves upwardly to send a pulse of pressure to the control devices 15, Fig. 2, which are similar to the control devices 22. The plunger 39 of each control device 15 is released to open a pilot valve 37 and so allow carbon dioxide from the cylinder 10 to pass via the passage 36 to the chamber 30 above a piston 31 which is thus moved downwardly. The piston connecting rod 32 moves the normally closed valve member 35 to the open position so that carbon dioxide exhausts from the cylinder 10 via the outlet 34 to the discharge conduit 16. The piston 31 of each of the cylinders 11, Fig. 1, is also moved downwardly to open the associated valve 35, Fig. 2, by the pressure of the carbon dioxide which enters the chamber 30 via the passage 40. Carbon dioxide from all the cylinders 10, 11, Fig. 1, passes into the discharge conduit 16 and along the line 17. Some of the carbon dioxide in the line 17, Fig. 3, associated with the space in which the fire has occurred passes via the passage 46 and the pilot valve 47 to the chamber 42 to move the piston 44 to the right and the connecting-rod 45 moves the normally closed valve member 41 to the open position to allow the carbon dioxide to be discharged into the appropriate space. Indicia 67 on the free end of the connecting-rod 55 is visible through an opening 70 on a sleeve 69 and affords an indication that the pulse transmitter 20 requires resetting. The sleeve 69 is removable and can be screwed to the end of the rod 55 to effect this resetting.
Patent GB-495881-A (GB)
Title: Manufacture of triphenylmethane dyestuffs
IPC: C09B11/20
Filed: 1937-05-31
Abstract: Acid or basic dyestuffs of the triarylmethane series containing a halogen atom in para position to the methane carbon atom are reacted with a 1-monoalkylamino-4-alkoxybenzene and sulphonating the product if basic.  In examples: (1) 1-methylamino-4-methoxybenzene is condensed with the dyestuffs prepared from (a) 4 - chlorbenzaldehyde and 1 - dihydroxyethylamino-3-methylbenzene, with oxidation, (b) 4 - chlorbenzaldehyde and 1 - N - ethylbenzylamino - 3 - methylbenzenesulphonic acid, with oxidation, (c) 4 : 41-dichlorobenzophenone and 1-isobutyl-2-p-chlorphenyl-4 : 6-dimethylindol; the dyestuffs not containing a sulphonic group are sulphonated, (d) 4-chlorbenzophenone-21-sulphonic acid and 1-isobutyl-2-p-chlorphenyl-4 : 6-dimethylindol with sulphonation; (2) 1-methylamino-4-ethoxybenzene is condensed with the dyestuffs prepared from (a) 4-chlorbenzene - 1 - carboxylic acid chloride and 1-methyl-2 phenylindol and (b) 1-N-ethylbenzylamino-3-methylbenzene and 2 : 41-dichlorbenzophenonedichloride and the resulting dyestuffs sulphonated; (3) the dyestuff from 4 : 41-dichlorbenzophenone and 1-isobutyl-2-p-chlorphenyl-4 : 6-dimethylindol is condensed with 1 - methylamino - 4 - ethoxybenzenesulphonic acid.  The products dye wool, silk and tanned-cotton blue and green shades. 4-Chlorbenzophenone-21-sulphonic acid is prepared by condensing o-sulphobenzoic anhydride with chlorbenzene in the presence of aluminium chloride.  1-Isobutyl-2-p-chlorphenyl-4 : 6-dimethylindol is prepared by condensing p-chlor-o -chloracetophenone with 5 - isobutylamino - 1 : 3-xylene, effecting ring closure and heating with zinc chloride and hydrochloric acid to cause the p-chlorphenyl radicle to migrate from the 3-position to the 2-position.
Patent GB-998851-A (GB)
Title: Improvements in or relating to polyurethane elastomers
IPC: C08G18/10
Filed: 1962-04-18
Abstract: Polyesterurethane elastomers are prepared by a process which comprises heating a mixture of a linear glycol-adipate polyester having a molecular weight of 2000-3000, and an organic di-isocyanate in an amount of from 3.10 to 3.30 moles per mole of polyester, adding thereto a cross-linker of the formula HO-R-OH, wherein R has the structure. <FORM:0998851/C3/1> or the structure <FORM:0998851/C3/2> R1 and R11 each being an alkylene radical, X being halogen, and a being an integer from 0 to 4, the cross-linker being present in an amount of from 1.96 to 2.08 moles per mole of polyester and having a water content of not more than 0.3% by weight and being non-alkaline in aqueous solution, thereafter moulding the mixture at 100-120 DEG C. under about 2000 p.s.i. pressure; and part curing at 100-120 DEG C. The prepolymer forming mixture may contain citric acid monohydrate.  Cross-linkers specified are p-xylene-a ,a 1-diol; 2,5-dichloro-p-xylene - a ,a 1 - diol; 2 - chloro - p - xylene - a ,a 1 - diol; and bis-(2-hydroxyethyl) terephthalate.
Patent GB-166110-A (GB)
Title: Improvements in and relating to artificial legs
IPC: A61F2/78
Filed: 1921-05-31
Abstract: 166,110. Rowley, J. F. July 6, 1920, [Convention date]. Limbs, artificial.-Relates to improvements in operating-means for artificial legs in which upper and lower leg-sections 1, 2 respectively are pivoted together by the usual knee-bolt 3, and comprises means, operable bv a movement of the shoulders of the wearer, for swinging the lower leg section into straightened position with respect to the other section and leg flexing-means opposing such straightening action for the purpose of bending the leg when it is lifted from the ground. The lower arm 5 of a lever 4 fulerumed on the knee-bolt 3 is attached to the lower legsection 2, and the upper arm 6 is forked to carry pulleys 7, around which pass the suspender loops 8. The loops pass also around pulleys 9 fixed to links 10 loosely mounted on the supporting pin 11 of the pulleys 7. A resilient web 13 is attached at one end to the links 10 and at the other end to the lower leg-section 2. If the leg is lifted and relieved of weight, the web 13 bends the knee-joint, but by drawing upwardly on the suspenders, by suitable movement of the shoulders over which the suspenders pass, the action of the web 13 can be overcome.
Patent GB-272252-A (GB)
Title: Improvements in or relating to methods of and apparatus for making tyres
IPC: B29D30/06
Filed: 1927-06-07
Abstract: 272,252. Goodrich Co., B. F., (Assignees of Gammeter, J. R.). June 7, 1926, [Convention date]. Moulding indiarubber and wheel tyres. - A built-up tyre cover is distended by the injection of a plastic material preferably of such consistency as to prevent retraction of the material on the withdrawal of t.he distending pressure, and is vulcanized while distended. The cover 20 is built on a segmental core held together by a chain 16, and formed with an annular slot 18, and transverse passages 19. The tyre and core is mounted between clamping members 22, 23 so formed that when in position, a gap 18b is left., continuing the slot 18 in the core. The clamping member 23 embraces one bead of the tyre, and is flat, while the member 22 embraces the other bead, and is domed as at 28 with a boss 29 which makes contact with a block 29a on the member 23 of the next tyre. Within the dome 28 is a diaphragm 30 secured at its edges 31, and between the diaphragm and the member 23 is placed a composition such as plaster of Paris and water, mica and glycerine, or preferably, clay and water or glycerine. Tyres, thus mounted, are placed in moulds 24, 25, the domes 28 are connected by flexible pipes 33 with a manifold consisting of sections 34, a pile is stacked in a press, pressure fluid is admitted to the domes and the tyres distended by the passage of composition through the slot 18 and passages 19, stretching the cords, and forming the tread pattern. The tyres may be partly vulcanized by passing steam through the press. The moulds are then removed and the flexible pressure tubes 33 disconnected, and a pile is built of tyres separated by perforated spacers 56, Fig. 6, in a press enclosing a casing 41 with pipes 52, 53, for the circulation of water, and an outer jacket 44 with steam circulating pipes 54, 55, and the vulcanization is completed in contact with water under pressure, the tyres being prevented from collapsing by the pressure exerted on the diaphragm 30 by the water which enters the dome 28 by the coupling 33a. In modifications, the dome and diaphragm are dispensed with, and the distending medium is forced into the tyres from an outside source.
Patent GB-641958-A (GB)
Title: Improvements in or relating to apparatus for treatment of sheets of paper
IPC: D21F13/00
Filed: 1947-06-10
Abstract: 641,958. Drying sheets. FRETZ, M. June 10, 1947, No. 15206. Convention date, Oct. 30, 1945. [Class 34(ii)] [Also in Group XIV] Apparatus for drying sheets of paper comprises a stationary cylindrical dram 1 with a side opening and a rotatably mounted top 2. Connected to the top 2 are radial bars 5 carrying displaceable clamps 6. Each clamp 6 is of M-cross section and enclose two rollers 7 to hold the sheets of paper. The air conduit leading to a conduit 8 inside the drum contains an electric heater and a water nozzle.
Patent GB-1083134-A (GB)
Title: Improvements in and relating to precious metal electroplating baths
Inventor: MARLOW EDGAR FREDERICK
IPC: C25D3/62
Filed: 1963-04-17
Abstract: A gold electro-plating bath having a pH of 3-7 contains a soluble gold compound e.g. gold cyanide and one or more soluble compounds, preferably not more than 10 g/l, of Pt, Rh, Pd and/or Ru, e.g. 0.005 g/l Pt (as diamino dinitrite). The bath may also contain an alkali metal phosphate e.g. NaH2PO4, tartrate or sulphamate. A chelating or complexing agent for the Pt group metal may be added.
Patent GB-766461-A (GB)
Title: Improvements in the production of wrapped packages
Inventor: ROSE ALFRED GERMAN
IPC: B65B9/06
Filed: 1954-05-25
Abstract: 766,461. Wrapping ice cream wafers. ROSE BROS. (GAINSBOROUGH), Ltd. May 24, 1955 [May 25, 1954], No. 15319/54. Class 94(1). Packages containing ice cream wafers are formed by depositing wafer biscuits 1 in succession on a web 3, placing an ice cream block 9 on each wafer biscuit and depositing a further wafer biscuit 1 on each block, the web then being wrapped to tubular form round the wafers. The tube is sealed between the wafers as described in Specification 743,978 and individual packages formed by cutting. The blocks 9 are formed and supplied from a strip by means as described in Specification 743,978. Prior to folding the web, a pad may press on each wafer to consolidate it.