baber/WOPTO huggingface dataset:
Patent GB-994484-A (GB)
Title: Coated abrasive products
IPC: C08G59/42
Filed: 1961-09-28
Abstract: A coating composition used as a binder in the manufacture of coated abrasive products comprises (a) an epoxy resin of the formula <FORM:0994484/C3/1> and/or an epoxy resin of the formula <FORM:0994484/C3/2> wherein R = hydrogen or methyl and n has an average value of 0 to 1.5, (b) pyromellitic dianhydride in an amount providing from 0.15 to 0.50 carboxyl groups per epoxy group and (c) an unsaturated reactive diluent in an amount from 5 to 100 parts per 100 parts by weight of the epoxy resin.  Diluents specified are diallyl maleate, diallyl ether, ethylene glycol dimethacrylate, triallyl cyanurate, diallyl phthalate, diallyl adipate, allyl glycidyl ether and glycidyl methacrylate.  Small amounts of other acids or anhydrides such as maleic, phthalic and chlorendic acids and anhydrides; initiators such as ethylene glycol, diethylene glycol, triethylene glycol, glycerol, trimethylolpropane, hexanetriol, melamine, dicyandiamide and an equal weight mixture of melamine and dicyandiamide; and fillers such as cryolite, calcium phosphate, alumina and calcium sulphate may be added. The abrasive specified is fused alumina.ALSO:A coated abrasive product comprises a backing, an abrasive grain and a binder therefor which is a cured composition comprising in its uncured state a mixture of (a) an epoxy resin having the formula <FORM:0994484/C4-C5/1> and/or an epoxy resin of the formula <FORM:0994484/C4-C5/2> wherein R=hydrogen or methyl and n has an average value of 0 to 1.5, (b) pyromellitic dianhydride in an amount providing 0.15 to 0.50 carboxyl groups per epoxy group and (c) an unsaturated reactive diluent in an amount from 5 to 100 parts per 100 parts by weight of epoxy resin.  In an example the backing is drills cloth and the abrasive is crushed fused alumina and the abrasive is given a final coating of a phenolic resin sand-size.
Patent GB-1515714-A (GB)
Title: Method of and apparatus for making blown plastic articles
IPC: B29C49/18
Filed: 1975-08-22
Abstract: 1515714 Blow moulding OWENS-ILLINOIS Inc 22 Aug 1975 [26 Aug 1974] 34942/75 Heading B5A A parison 80, 150 for a blow-moulded container is injection or transfer moulded about a core pin 70 which projects into a mould 55 (Fig. 14) from one end and is located by a support 134 entering through the other end of the mould, and when the parison is removed from the mould 55 the end 83 or 156 which projects beyond the tip of the core pin is pinched shut before blow-moulding, e.g. by cutting edges 87 on the blow mould (Fig. 7). The core pin is mounted in an assembly 65 comprising an upper block and depending cam surfaces which engage and close neck moulds 60 when the core pin 70 is lowered into the mould 55. The recessed end of the core pin is entered by a locating pin 134 which is then depressed. This may simply cause the depression of a valve member 131 against the action of a spring 132 to open the orifice 130 and permit injection of material from passage 142 through passage 140. Optionally a sliding member 125 may be retained to the injection block 110 by a cap 113 so that the descent of the mould 55 after it is engaged by the mounting assembly 65 of the descending core pin 70 causes the member 125 to be depressed and expel the material accumulated in the passage 140 into the mould. On raising the core pin and mould the passage 140 enlarges and becomes refilled and the valve 131 will close the orifice 130. The parison is carried to a pre-blowing mould on the core pin which may also act as the blow pin (Fig. 7) or a separate blow pin may be used (Fig. 16). The pinched off end of the parison is removed by members 90 and the pre-blown parison is carried to a final blow mould (Fig. 18) where part of it may be pinched out to form a handle. The injection and blowing stations are provided around a table 21 and comprise an injection unit 37 and mould 30, a preblowing mould 31 closed by cylinders 33, and a final blow mould 32 also closed by cylinders 33. The core pin and blow pin are carried by arms 22, 23 respectively which are oscillated through 120 degrees by a rack and pinion 26, 24 and are lowered into the mould by a cylinder 25 beneath the table.
Patent GB-1023022-A (GB)
Title: Improvements in or relating to mechanical seals for rotating shafts
Inventor: LYMER ARTHUR
IPC: F16J15/38
Filed: 1962-11-13
Abstract: 1,023,022. Mechanical seals. FLEXIBOX Ltd. Sept. 12, 1963 [Nov. 13, 1962], No. 34947/62. Heading F2B. A mechanical seal for a rotating shaft 3 comprises a sealing member 12 which is rotatable with and axially slidable on the shaft and is urged into sealing contact with a fixed seal face 17, an axially slidable spring-loaded sleeve 7 and an associated coaxial piston 11, the arrangement being such that the spring loading is automatically relieved in proportion to the pressure differential across the seal in at least one direction of the differential. The sleeve 7, which may be loaded by a single coil spring 10, as shown, or by a number of springs, is sealed by an 0-ring 8 to an element 4 fixed to the shaft and has a projection 14 which extends into a groove 15 on the member 12. The seal face 17 is prevented from rotating by pins 18. The piston 11 is integral with the sleeve 7 and sealed to the member 12 by an 0-ring 13. In the arrangement shown in Fig. 1, the spring- loading is relieved only when the high pressure exists on the right-hand side of the seal, as shown in the top half of the Figure. When the pressure differential is in the opposite direction, as shown in the lower half, there is no spring-loading relief. In a modification, Fig. 2 (not shown), the piston is separate from the sleeve 7 and the spring loading is relieved, irrespective of the direction of the pressure differential.
Patent GB-1224420-A (GB)
Title: Pedestrian road bridges
Inventor: BOOTH GEORGE ERNEST
IPC: E01C1/04
Filed: 1969-07-11
Abstract: 1,224,420. Pedestrian bridges. G. E. BOOTH. 19 Sept., 1969 [11 July, 1969], No. 34976/69. Heading E1G. A pedestrian road bridge of bascule type comprises an elevated walkway supported at each end by a roadside tower containing access lifts, the walkway comprising two portions which meet over the road on a central support column and which can be raised about horizontal hings axes on the towers. The central support may comprise a wooden post which can be removed when the bridge portions are raised to allow the use of the road as an aircraft landing strip. The bridge of the invention may be associated with an underpass and various community facilities, Fig. 3 (not shown).
Patent GB-800900-A (GB)
Title: Improvements relating to dust collectors for rock drills
IPC: E21B21/015
Filed: 1956-11-16
Abstract: 800,900. Drilling-machine details. MINE  SAFETY APPLIANCES, CO. Nov. 16, 1956 [Dec. 13, 1955], No. 35090/56. Class 83 (3). In a dust-collector for rock-drills, a receiver 1, connected to a sealing-gasket 2 engageable with a mine-roof 3 around a drill 6, is connected at its base to a tube 7. The tube 7, passing through a central opening in the receiver, has, rotatably mounted on its upper end, a ring 10 supporting a dust-deflecting cap 8 clamped by a bond 9. The receiver is supported by a bearing 13, mounted on the flange of a sleeve 12, the lower end of which has two parallel and two downwardly and inwardly-inclined sides. Shoes 14, shaped internally to fit the drill 6, engage the inclined sides, the shoes being urged, collet fashion, by a spring 16 connected to flanges 17, 18 on the sleeve and shoes respectively. In operation, the shoes grip the drill-shank 6 sufficiently to support the receiver but permit linear movement of the drill. In a modification, a central tube 21, Fig. 4, secured to a sleeve 22 containing shoes 23 gripping the drill 24, passes through a bearing 26 and is rotatably supported by bearings 32 mounted in a tube 31 welded to the receiver-base. A sealing-cap 33, having a skirt 35 overlapping tube 31 is clamped on the tube 21 by a ring 34 and grips the drill-steel. In operation, the cap, inner-tube and sleeve rotate with the drill.
Patent GB-917483-A (GB)
Title: Improvements in or relating to the treatment of dustbin refuse and like dry waste products
Filed: 1959-10-16
Abstract: 917,483. Disintegrating refuse &c. COMPOST ENGINEERS Ltd., REES, D. F., GOTHARD, S. A., and BRUNT, L. P. Nov. 22, 1960 [Oct. 16, 1959], No. 35156/59. Class 59. A machine for disintegrating dustbin refuse and like dry waste products comprises a cylindrical perforated screen 11 to the interior of which the waste products are fed by means of a conveyer 12, the screen being rotatable about its longitudinal axis which is either horizontal or slightly tilted out of the horizontal, and cutting and grinding rotors 15, 16 and 17 which are rotatable about axes substantially parallel to the longitudinal axis of the screen and in the direction opposite to that in which the screen is rotated, to effect cutting and grinding in co-operation with the screen. Rotor 15 comprises an openwork structure of helical blades 15a disposed between discs 15b while rotors 16, 17 comprise drums 16b, 17b carrying blades 16a, 17a. Each rotor 15 to 17 is free to revolve on adjustable and adjustably-mounted arms 18 about a shaft 19 which is substantially parallel to, but not coincident with, the longitudinal axis of the screen; alternatively, each rotor, or all three together, may be mounted on a resilient element with freedom to move in a direction substantially along a radius of the screen 11. Waste products retained within the screen after treatment by the rotors 15 to 17 are lifted by scoops 24 on to a return conveyer 21 which transfers the material to a conveyer 25 having a magnetic separator pulley 26 adapted to divide the material into two parts, the magnetic part being delivered into a shoot 27 for removal from the machine and the non-magnetic part being delivered via a shoot 28 into a hammer mill or the like 29 from which it is returned to the input conveyer 12. The conveyer 25 passes an inspection platform 31 where appropriate parts of the waste products can be manually picked out or sorted into shoots 32. The treated waste products which fall through the screen are carried away by a conveyer 33. A further conveyer 35 removes dust and small particles which fall through the screen perforations as soon as the waste products are introduced into the screen.
Patent GB-620432-A (GB)
Title: Improvements relating to the heat treatment of strip metal by electromagnetic induction
IPC: C21D9/60
Filed: 1946-11-27
Abstract: 620,432. Induction heating. LUDLOW, J. H., BENNETTS, H. G., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Nov. 27, 1946, No. 35186. '[Class 39(iii)] Continuous metal strip or short lengths such as hack-saw blades 1 are conveyed, by rollers 2 driven from a common shaft 7, between heating coils 3, 3<SP>1</SP> arranged to provide a magnetic field normal to the surface of the strip. By this means it is stated that the edges of the strip only are heated due to the radio frequency currents employed and the resultant localized high eddy current density on the edges of the strip.
Patent GB-776301-A (GB)
Title: Improvements in or relating to methods of manufacturing semi-conductor devices
IPC: H01L23/06
Filed: 1954-12-06
Abstract: 776,301. Semi-conductor devices. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Dec. 6, 1954 [Dec. 9, 1953], No. 35253/54. Class 37. A method of making a semi-conductor device, e.g. a crystal diode or transistor, comprises fusing to a body of one conductivity type an electrode which alloys locally with the body to form a region of opposite conductivity type then removing the peripheral edge of the electrode by mechanical means so that a groove is formed around it in the body, and etching to remove further material from the electrode and groove. A transistor (Fig. 1) is made by fusing pieces of In 2, 3, the larger one to serve as collector electrode, to opposite sides of an N-type Ge wafer 1 to form PN junctions therein. The electrode edges are then removed by grinding with tools 6 of the form shown, the grinding being continued to form grooves around the electrodes (shown by dotted lines). The wafer is then etched in a mixture of nitric and hydrofluoric acids to deepen the grooves. To avoid erosion of the rest of the wafer and electrodes the entire surface may be coated with acid-resistant material before removal of electrode edges. Polystyrene or paraffin wax is useful for this purpose but an electroplated layer of a metal, the surface of which is rendered insoluble by initial attack of the etchant, e.g. A1 or Pb, or which is inert to the etchant, e.g. a noble metal such as Pt and Au, is preferred since it may afterwards serve as an ohmic base contact. An alternative transistor uses a wafer of P type Ge in conjunction with fused electrodes of lead-antimony alloy.
Patent GB-756659-A (GB)
Title: Improvements in devices for casting concrete under water
IPC: E02D15/06
Filed: 1954-12-06
Abstract: 756,659. Subaqueous concrete. ENTREPRISE FOUGEROLLE POUR TRAVAUX PUBLICS. Dec. 6, 1954 [Dec. 14, 1953; Nov. 22, 1954], No. 35287/54. Class 68(2) In the underwater casting of concrete using a spout a and hopper b, the concrete is maintained at all times at the minimum level e such that the height h above the deposited concrete compen. sates the water head H bearing on the concrete. Th E  spout a may be made from sections each comprising twc half cylinders bolted together the lowest section, which is in one piece and has adjustable concrete discharge apertures, carries a pulley round which a hoisting cable passes so that as the casting proceeds' the whole spout, except the hopper b, may be raised, each uppermost section immediately below the hopper being dismantled and removed, at a platform just below the working platform, as it rises. The rate of. winding of the hoisting cable may be controlled by photo-electric cells or other means to ensure that the height of concrete in the spout is maintained. Forms of priming plugs and of means for adjusting the sizes of the concrete discharge apertures are described in detail and reference is made to vibrators for the concrete.
Patent GB-487789-A (GB)
Title: Improvements in or relating to transfers
IPC: B44C1/175
Filed: 1936-12-23
Abstract: 487,789. Transfers. MATTHEWS, A. G., PRIOR, S. C., and GRAY, N. V. Dec. 23, 1936, No. 35307. [Class 100 (ii)] The display layer of a transfer, which is applied to a water-soluble adhesive layer on a temporary support, such as paper, and covered with an outer adhesive layer which serves to secure the display layer to the surface to be decorated, is coated with a substance adapted to facilitate the binding thereto of the outer adhesive layer. The display layer is preferably a printing-ink mixed with a hard gum varnish and white spirit or other thinner, and is applied by the silk-screen process. After application of the display layer to the layer of adhesive, e.g. gum, starch, dextrin, or the like, it is sprinkled, while still tacky, with powdered kaolin, bauxite, or the like. The outer layer, e.g. of gum arabic, is then applied ; it may be applied in dry powder form mixed with the kaolin. According to the Provisional Specification, the display layer consists of an oil paint prepared from linseed oil, white lead, and pigment, to which is added a natural or synthetic gum or resin such as dammar, kauri, or manila, and driers in a mixture of tung and linseed or perilla oils.
Patent GB-919991-A (GB)
Title: Calculating machines
Inventor: ACRED NEIL BERTRAM
IPC: G06F7/46
Filed: 1960-10-15
Abstract: 919,991. Multiplying apparatus. BENDIX ERICSSON U.K. Ltd. Sept. 21 1961 [Oct. 15, 1960], No. 35419/60. Class 106 (1). The multiplication of a sterling amount is facilitated by use of an encoder which receives in turn digits of the amount and is conditioned by signals representing the denominations in that amount to deliver at output terminals signals representing the product digits (e.g. " 5 " input with " pence " conditioning signal delivers " 2 " in a first cycle and " 4 " in a second) derived when the amount is multiplied by ten. Fig. 5 shows schematically (left of the chain line) the encoder 123 and various uniselectors and relays for use with an accounting-machine of the " Addo-X " (Registered Trade Mark) type (right of the line). To effect a multiplication key 27 is first depressed to allow the numerical multiplier to be entered digit-by-digit into registers A-F. The most significant digit is entered first. into F, and any subsequent keying shifts up the contents of A-F one place and puts the new digit in F. The multiplier (no more than 3 digits) is then transferred to a magnetic core store 24, having one column for each denomination and one row for each digit (in the pence position 10 and 11 each count as single digits and corresponding keys and cores are provided). A programme switch 136 comprising two uniselectors then steps to read out in turn the multiplier digits to input terminals 122 of the encoder. The outputs are in binary coded form, and at this stage uniselectors 125 select the unchanged value of the digits which through relays 132 mark corresponding contacts of the units (U), tens (T) and hundreds (H) uniselectors 131. These hunt to find the marked contact ; if a digit is greater than five unit 130 is conditioned to add one to the next higher digit and a relay 134 moves the corresponding switch 135 from " add " to " subtract." The core store is now cleared and key 27 returned to " sterling " position, when the sterling multiplicand can be keyed into registers A-I and transfered to the core store 24. The programme switch now moves to home the units uniselector 131 ; at each step the contents of the keyboard are added into a totalizer (not shown)-or subtracted if the contacts 135 have been changed over. At the next step of the programme switch the contents of core store 24 are multiplied by 10 by reading out the digits in turn (uniselector 121) and passing them to the encoder. Uniselectors 125 stepping in synchronism with 121 select the desired product digits (the action is described in more detail in connection with Figs. 1 and 10, not shown) which now operate solenoids 126 (132 are disabled) to set up the product in register A-I by energizing the key solenoids. The programme switch then steps to cause addition or subtraction of this " 10 X multiplicand " to the contents of the totalizator in accordance with " tens " uniselector 131, and so on for the hundreds, when the final product is available for printing. The circuit is described in some detail in connection with Figs. 10-17 (not shown).
Patent GB-981507-A (GB)
Title: Improvements relating to waste outlets
Inventor: MIDGLEY ALLAN CLOUGH
IPC: E03C1/22
Filed: 1962-09-18
Abstract: 981,507. Waste outlets for baths and basins. TAYLOR RUSTLESS FITTINGS CO. Ltd. Nov. 21, 1963 [Sept. 18, 1962], No. 35433/62. Heading A4N. Pressure is applied between nut 13 and flange 11 to compress flanges 3 and thus to cause flanges 2 of identical metal cup shaped members 1, formed by high pres sure rotary cold rolling, to grip the botton S of a sink or both. Sealing washers 7 anc 12 are inteposed between the flanges. The members 1 may be of stainless steel and may support a basket strainer 6 on ledge 4. A plug 16 is movable between the two positions shown and, in the upper posi tion, is supported, by stirrup 18, on the spider arms 9 of a grille 8. A plastic plug may have an integrally moulded stem 15 and stirrup 18.
Patent GB-1354709-A (GB)
Title: Butterfly valve and sealing ring therefor
IPC: F16K1/226
Filed: 1971-07-28
Abstract: 1354709 Valves P T MANNVILLER 28 July 1971 [28 July 1970] 35517/71 Heading F2V In a butterfly valve a sealing ring 9 of substantially trapezoidal cross-section with a recess in its inner periphery is disposed in an annular channel about the periphery of the rotatable valve member 4. The channel is defined by the member 4 proper and a retaining plate 11 which is spaced from the member 4 to provide communication between the inlet passage 7a and the cavity 14 defined between the ring 9 and the base of the channel so that inlet fluid pressure urges the ring outwards on to the spherical or frusto-conical seat 8. Passages in the member 4 may alternatively communicate cavity 14 with the inlet.
Patent GB-1182058-A (GB)
Title: Circuit Arrangement for the Overload and Short Circuit Protection of a D.C. Voltage Transformer
IPC: H02H7/12
Filed: 1968-07-25
Abstract: 1,182,058. Automatic voltage control. INTERNATIONAL STANDARD ELECTRIC CORP. July 25, 1967 [July 26, 1967], No.35543/68. Heading G3R. A voltage stabilizer of the chopper type is provided with an overload protection circuit which derives its operating signal not from a current monitoring resistor, as is usual, but from the secondary winding of a smoothing choke in the output circuit of the stabilizer. As shown, a load 6 is supplied from source terminals 1 by way of a chopper 2 and a filter including the primary winding 3 of a smoothing choke, a capacitor 5 and a diode 10. The chopper 2 is associated with a saw-tooth generator 7, a pulse-width modulator 8 and a pulse-shaper 9, and the mark-space ratio of the chopper is automatically controlled in known manner to compensate for output voltage variations as detected by a transistor 11 having its base connected to receive the output voltage, its emitter connected to a reference Zener diode 12, and its collector connected to the modulator 8 which is thus controlled by the error signal derived from transistor 11. The overload protection circuit comprises a secondary winding 4 of the smoothing choke, a variable resistor 4 and a transistor 13, these components being inter-connected as shown with the primary winding 3 and the pulseshaper 9. The resistor 14 can be adjusted so that the transistor 13 is rendered conductive when the current through the winding 3 exceeds a predeter - mined value, and the pulse-shaper 9 then acts to reduce the mark-space ratio of the chopper 2 whereby both the chopper and the load are protected against excess current. The primary winding 3 is closely coupled to and has the same number of turns as the secondary winding 4 so that any alternating components in the primary signal, which would otherwise affect operation of the transistor 13, are balanced out.
Patent GB-754819-A (GB)
Title: Improvements in the purification of 1, 1, 1-trichloro-2, 2-bis(4-chlorophenyl) ethane
IPC: C07C17/38
Filed: 1954-12-09
Abstract: Dichlorodiphenyltrichloroethane - (1 : 1 : 1-trichloro - 2 : 2 - bis - (4 - chlorophenyl) ethane) is purified by subjecting it to centrifugal force of not less than 10 G. while heating to a temperature not exceeding the melting-point of the pure product by means of a hot fluid, so as to cause separation of liquid materials from the solid.  Heating may be by various methods, with the material in any form containing impurities.  In examples DDT flake of 66 per cent para-isomer is subjected to centrifugal force of 990 X gravity, while being heated with boiling water, to give a solid residue containing 92 per cent p-p1-isomer; granulated DDT is centrifuged with water up to 62 DEG  C. after separating, with water up to 80 DEG C. and steam, to give a product of 95 per cent purity; fused DDT of 74 per cent para isomer, powdered, is centrifuged with water up to 70 DEG  C. to give 88 per cent pure product; a hot solution of sodium sulphate or other salt may also be used for washing and the process may be performed continuously.