baber/WOPTO huggingface dataset:
Patent GB-864846-A (GB)
Title: Improvements in or relating to ceramic members
IPC: H01C7/02
Filed: 1959-05-07
Abstract: 864,846. Temperature-dependent resistors. WESTINGHOUSE ELECTRIC CORPORATION. May 7, 1959 [May 13, 1958], No. 15668/59. Drawings to Specification. Class 37. Ceramic members having a positive temperature coefficient of resistance over a temperature range have the general formula M x Ba (1-x) Zr y Ti (1-y) O 3 , where M is at least one of Y and Ce, x = 0.003-0.03, and y= 0.01-0.25. A preferred formula is where x = 0.005-0.02 and y = 0.01-0.25. The resistance of such members is said to rise comparatively slowly up to an intermediate value at a certain temperature, then to rise rapidly when this temperature is exceeded ; as y is increased, the temperature at which the intermediate resistance is reached falls. Starting materials, which are titanium dioxide (anatase), barium oxide or a barium salt, e.g. barium carbonate which decomposes to barium oxide, the oxide or nitrate or oxalate salt of yttrium or cerium, and zirconium dioxide or zirconium chloride, in the desired proportions, are wet mixed in a ball mill, dried and calcined. The calcined product is then ball milled in water, dried, and recrushed, the resultant powder, to which a small amount of an organic binder may be added, being pressed into pellets which are sintered in an inert atmosphere, and later aged by heat treatment in an oxidizing atmosphere. Contact layers are applied to the pellet by an ultrasonic process employing a solder of lead, indium and silver in preferred proportions of 8: 1 : 1 ; alternatively, brazing or other low contact resistance producing methods may be used. In one example, titanium dioxide and zirconium dioxide are mixed in mol. proportions of 0.94 and 0.06 respectively; 0.985 mol. of barium carbonate and 0.015 mol. of yttrium nitrate are added, the mixture being wet-milled for 4 hours, and dried at 80 C. in air. The product is next calcined in air for 2 hours at 1000 C., wet-milled for 8 hours, dried, pulverized and screened, the powder obtained being mixed with 20 cc. of a 10% aqueous emulsion of polyvinyl alcohol per 100 grams and pressed at 15,000 p.s.i. into a cylindrical pellet which is sintered in argon at 1350 C. for 2 hours and then heat treated in air at 1250 C. for a further 2 hours. The resistance-temperature curve of the resulting pellet is shown in Fig. 2 (not reproduced). In other examples, pellets are produced by the above method, the starting materials being proportioned to produce compositions of the following formula.: and by mixing salts of cerium and yttrium a pellet of formula can be obtained. Details of the resistance-temperature characteristics of these examples are given in the Specification. Specification 864,845 is referred to.
Patent GB-440882-A (GB)
Title: An improved process for procuring the direct adhesion of soft rubber to metal
IPC: C08J5/12
Filed: 1934-05-25
Abstract: A process for securing the adhesion of soft rubber to metal comprises plating with copper or brass the metal surface to which it is intended to apply the rubber, covering the plated surface with a thin film of rubber by electrodeposition from aqueous dispersions of rubber and then applying a layer or layers of coagulated soft rubber. The dispersions of rubber may be natural or artificial and may or may not contain vulcanizing ingredients, compounding ingredients such as carbon black, zinc oxide or whiting, protective colloids such as casein, alginates, or soap, or antioxidants such as phenyl-betanaphthylamine.  In an example the surface to which it is desired to secure the rubber is first cleaned electrolytically in a bath of soaps and alkalies, washed with dilute sulphuric acid containing a small proportion of chromic acid, plated with nickel in a nickel sulphate bath using anodes of nickel containing a small proportion of green nickel oxide, washed with a solution of potassium cyanide, plated with brass in a bath containing copper, zinc and potassium cyanides, caustic soda, glucose and a peptone, washed with boiling water and then coated electrolytically with a thin film of rubber from an aqueous rubber dispersion, the film dried in warm air and finally layers of calendered compounded soft rubber applied to the surface and the whole moulded and vulcanized.  The plated surface may be moved, e.g. it may be rotated, during the deposition of the rubber film to ensure a uniform coating.
Patent GB-389684-A (GB)
Title: Improvements in radial flow steam turbines
IPC: F01D1/28
Filed: 1932-06-02
Abstract: 389,684. Steam turbines. ALLMANNA SVENSKA ELEKTRISKA AKTIEBOLAGET, Vasteras, Sweden. June 2, 1932, No. 15696. Convention date, June 4, 1931. [Class 110 (iii).] In a radial-flow extraction turbine having two or more groups of blades 21, 22 carried by discs 3, 4, 5 on oppositely rotating shafts 1, 2, the passage of steam from the first group to the second group is controlled at an extraction point by an annular valve 33. Packing members are provided at 31. The main steam supply takes place from a chamber 7 and overload steam may be supplied to or steam may be extracted from additional chambers 8, 9, 10 connected with inter-blade spaces. End-thrust balance may be secured by varying the sizes of the discs of the labyrinths 13, 14 or by leading leakage steam from the high-pressure labyrinth 13 to the low-pressure labyrinth 14 by a pipe 36. The space 24 between the discs 5, 6 may be bladed.
Patent GB-719581-A (GB)
Title: Improvements relating to portable duplicating machines
Inventor: FORD RONALD MAX
IPC: B41L11/00
Filed: 1952-06-21
Abstract: <PICT:0719581/III/1> <PICT:0719581/III/2> In a duplicating machine wherein moistened copy sheets are brought into pressure contact with a mirror-script master sheet supported on a cylinder or the equivalent, there is provided a casing or supporting structure which is constructed to fold or close up so as to render the machine portable, and a copy sheet moistening system including a tank adapted to establish a gravity or pressure feed to a moistening pad or the like, having means to prevent leakage of liquid from the tank when the machine is folded up. The machine comprises a machine unit 10, Figs. 2 and 4, carrying the master sheet cylinder pressure roller, and moistening device, the arrangement of which may be of the construction described in Specifications 684,398 and 684,399, [both in Group XVI].  Hinged to the unit 10 are two casings 12, 13 the casing 13 acting as a collecting tray and the casing 12 as a feed-in table for the copy sheets.  Liquid is supplied through a flexible tube 19 from a tank 14 having a filler cap 18 and pivotally supported on brackets 16 on the machine unit side frame 15.  When the tank is inverted by pivoting into the chain line position of Fig. 4, a gravity feed is established to the moistening member, and when the formation of a partial vacuum in the tank, which is of light-gauge sheet metal, prevents further liquid flow, the sides of the tank are squeezed together to produce further flow.  In the inoperative position of the tank, the tube 19 becomes kinked to prevent leakage, while when the tank is in the operative position, the casings cannot be closed.  The casing 12 has a plate 23 acting as a feed-in table and having an adjustable sheet guide 36.  The plate 23 is pivoted to the unit 10 at 26, and its outer end is guided on inclined flanges 28, so that on closing the casing 10, the plate 23 is folded against the casing base.  Alternatively to the gravity feed, a pressure feed plunger may be provided on the tank or on its outlet duct, in which case the tank may be fixed.
Patent GB-920554-A (GB)
Title: Improvements in or relating to the production of flour
IPC: B02B1/04
Filed: 1961-05-01
Abstract: 920,554. Treatment of wheat. K. ISHIKAWA. May 1, 1961, No. 15729/61. Class 58. Tempered wheat is treated by chlorine dioxide either in or with water (2-15 p.p.m. chlorine dioxide and 2-3% tempering water both as compared by weight with the tampered wheat) for 1-2 minutes prior to grinding the wheat for flour. In the Figure, chlorine dioxide generated in tank 1 is babbled into water in tank 7 and then the solution is passed to the conveyer 11 which also passes wheat entering at 17 into tank 14 where the wheat is retained in contact with the chloride dioxide solution at a temperature of 40-50‹C. Even flow of wheat through tank 14 is ensured by member 15.
Patent GB-553005-A (GB)
Title: Improvements in or relating to moving stairways
IPC: B66B29/00
Filed: 1941-12-08
Abstract: 553,005. Escalators. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Dec. 8, 1941, No. 15806. Convention date, Dec. 7, 1940. [Class 78 (i)] [Also in Group XXXIV] The sprocket wheels 7 driving the chains 4 of the treads 1 of an escalator are automatically braked by wholly mechanical means if the driving means for the sprocket wheels break. In the construction shown the sprocket wheel shaft 13 is driven from a motor 16 through gearing 18 and a chain 21, and a weight 57 positioned by a radius arm 60 normally rests on the upper run of the chain. If the chain breaks the weight falls and pulls a cable 53 to rock a shaft 48 and move a pawl 32 into engagement with a ratchet ring 31 which is thereby held fast. The ratchet ring is concentric with the shaft 13 and is bolted at 37 to brake rings 29, 30 gripping a disc 28 fast on the shaft 13, the inner faces of the rings 29, 30 being provided with brake linings. Thus, when the rings 29, 30, 31 are held fast they act as a brake on the disc 28 and shaft 13. The cable 53 is attached to a weight 51a heavy enough to raise the pawl 32 clear of the ratchet ring when the weight 57 is supported by the driving chain. The usual service brake 25 is provided on the motor shaft.
Patent GB-151365-A (GB)
Title: An improved ignition device for internal combustion engines
IPC: H02K21/26
Filed: 1919-06-24
Abstract: 151,365. Fagan, J. H. June 24, 1919. Magneto-electric machines.-A magneto for igniting an internal-combustion engine consists of a permanently-magnetized steel disk e with opposite faces of North and South polarity and two sets of armature coils f, either the coils or the disk being mounted on a rotatable shaft a driven from the crank-shaft of the engine. The coils fare connected electrically to a cam or wiper i which engages a plunger j, the spark being produced between the plunger and a friction point k on the piston head, or in the combustion chamber. The make-and-break contacts are protected from the exhaust gases by means of a screen m made of magnetized steel wire.
Patent GB-1397073-A (GB)
Title: 1,2,4-oxadizoles
IPC: C07D271/06
Filed: 1971-05-19
Abstract: 1397073 Antibacterial &c medicines GLAXO LABORATORIES LTD 18 May 1972 [19 May 1971] 15838/71 Heading A5B [Also in Division C2] Pharmaceutical preparations having, in particular, antimicrobial activity, including antiviral, antiparasitic and antibacterial activities, contain (I) as active ingredient where R<SP>6</SP> represents R, where R represents a hydrogen atom or an aliphatic, cycloaliphatic, araliphatic, aryl or heterocyclic group; or a carbamoyl group of the formula -CONR<SP>1</SP>R<SP>2</SP> where R<SP>1</SP> and R<SP>2</SP>, which may be the same or different, represent hydrogen atoms or alkyl, alkenyl or alkynyl groups (or such groups substituted by a hydroxy group) or cycloaliphatic, araliphatic or aryl groups, or, together with the intervening nitrogen atom, represent a heterocydic ring; and R<SP>7</SP> represents R, Where R is as defined above, or a carbamoyl group of the formula -CONR<SP>3</SP>R<SP>4</SP>, where R<SP>3</SP> and R<SP>4</SP> are as defined above for R<SP>1</SP> and R<SP>2</SP>; provided that at least one of R<SP>6</SP> and R<SP>7</SP> is an N-substituted carbamoyl group. Administration is e.g. orally, topically, rectally, parentally or intravaginally. Other compounding ingredients may be, e.g. anti-inflammatory agents such as steriods, e.g. betamethasone-21-phosphate or antibiotics such as tetracycline and neomycin sulphate. The examples describe the preparations of tablets, capsules, eye drops (aqueous and oily) and ointments and nasal sprays.
Patent GB-236371-A (GB)
Title: Improvements in and relating to handles and bearings for rotating tools
IPC: B25B27/00
Filed: 1924-07-02
Abstract: 236,371. Thompson, G. H. July 2, 1924. Cleaning internally, rotary appliances for.- The bearing housing d for the spindle p of a rotating tool for the mechanical cleaning of metal or the like is secured in the tool handle a by radial screws or pins c passing through annular rings or collars b integral with the handle. The screws c are looked in position by spring rings v and end thrust on the screws c is relieved by a rib l on the housing engaging a groove m in the handle. The bearings o for the spindle p are separated by asleeve q and rows of balls r engaging collars s on the spindle take up end thrust. The adjusting nut e is secured by .a screw c<1> entering one of a peripheral series of holes w in the nut and locked by a spring ring vl. A felt washer u prevents oil leakage and excludes dust. The handle may have integral collars g, g<1> to receive screws for fixing the guide sleeve of a flexible driving shaft, the annular recces between the collars g, g<1> accommodating a spider to hold the handle within a boiler tube or the like. The spider may be divided or the collar g' may be detachable.
Patent GB-452333-A (GB)
Title: Improvements in gas heated washing machines or boilers
IPC: D06F1/00
Filed: 1935-06-01
Abstract: 452,333. Burner mountings. PILKING- TON, W., c/o Economic Gas Boiler Co., Ltd., Junction Street, Burnley. June 1, 1935, No. 15968. [Classes 75 (i) and 126] In a gas-hea,ted washing-machine or boiler in which the burner B is adapted to be swung to an igniting aperture a<1> in the casing A, the mixing-tube Bl is provided with a pivot pin b<2> engaging a slot d in a bracket D, secured over an aperture a in the casing and carrying the nipple e, and the burner B is supported by a lug b resting on a bracket C having a slot c engaged by a pin b<1> on the lug. An operating rod C<1> is fixed to a lug supporting a drip catcher c<2> below the burner. The bracket C is preferably inclined downwardly towards the aperture a<1> but may be horizontal or upwardly inclined.
Patent GB-749951-A (GB)
Title: Improvements in and relating to devices for emptying bins into a receptacle, particularly a dust cart
IPC: B65F3/04
Filed: 1954-05-31
Abstract: 749,951. Refuse bins. GRAAFF, P. DE. May 31, 1954 [June 2, 1953], No. 16028/54. Class 26. Dust bins are emptied into a dust cart or like receptacle by an initial manual swing- ing movement which operates a fluid control member or an electric switch to complete the swinging movement hydraulically or electrically. As shown, a bin holder 1 hinged at 2 to the rear 3 of a dust cart is coupled by a link 8 to the piston-rod 7 of an hydraulic cylinder 6, pivoted at 10 to the cart. Rotation of the bin holder and a toothed sector 16 attached to it rotates a toothed wheel 15 through 90 degrees to operate a cock supplying fluid to the cylinder 6, thus tilting the bin up to the opening 5. Return movement of the bin is effected by an hydraulic timing device of the needle valve type which releases fluid from the cylinder 6; this timing device and the fluid cock are described in detail and illustrated.
Patent GB-1418786-A (GB)
Title: Catalysts supports
IPC: B01J20/18
Filed: 1973-04-04
Abstract: 1418786 Hydrogenation catalyst BRITISH PETROLEUM CO LTD 10 April 1974 [4 April 1973] 16073/73 Heading B1E [Also in Divisions Cl and C5] A catalyst is formed by reacting a compound of a group VIII metal, preferably acetylacetonatodicarbonyl rhodium or chlorobiscyclooctene rhodium dimer, with an inorganic catalyst support having groups containing trivalent phosphorus bonded thereto, the support being prepared by a) reacting an inorganic solid containing surface hydroxyl groups with a compound of formula where X is a halogen atom, R is a divalent organic group containing up to 12 carbon atoms, R 1  and R 2  are organic radicals containing up to 12 carbon atoms and R 3  is an alkyl or aryl radical containing up to 12 carbon atoms, under conditions to effect reaction between the -OR 3  group and an -OH group on the surface of the inorganic solid and thereby bond the compound (1) to the inorganic solid and b) reacting the product with a phosphide to replace the halogen atom with a group containing trivalent phosphorus.
Patent GB-161052-A (GB)
Abstract: 161,052. Impey, F. L. March 3, 1920. Covers.-A support for looseleaf books comprises two fixed or adjustable tables a, b and an intermediate abutment f for the inner edges of the leaves which is capable of being raised and lowered in relation to the tables. The abutment f moves in guides e, the movements being effected by a handle p actuating a crank o having a pin n engaging a slotted cross-head j on a spindle i, on which is a sleeve k attached by screws m and a crossbar L to the abutment f. Catches r for engagement over the clamping - bars g of the book, retained in holders u as described in Specification 161,051, are pivoted to the upper end of the spindle i and engaged at their lower ends by inclined slots t with pegs s on the sleeve k, the abutment being slotted for the passage of the catches. The upper edge of the crank o is formed as a cam for engagement with the sleeve k, the cam being shaped so that relative movement of the sleeve and spindle for operating the catches r is obtained at the end of the upward movement and at the commencement of the downward movement, but is prevented during the main portions of the movements. The sleeve k is held up to the cam by a spring v, and the spindle i is pressed downwards by a spring w. The catches r serve in place of fixed projections on the abutment for engagement in slots in the leaves to keep them aligned.
Patent GB-1525416-A (GB)
Title: Dc-dc converter
IPC: H02M3/337
Filed: 1976-04-21
Abstract: 1525416 Protecting DC-DC converters MULLARD Ltd 21 April 1976 16106/76 Heading H2F  In a DC-DC converter comprising a switching transistor 1a arranged to switch current from a DC source 31 into an inductance, such as the primary 5a of a transformer 6, coupled via rectifier 10a to output terminals 8, 9, overcurrent protection is provided by monitoring the current of transistor 1a and feeding the resulting signal to a circuit 22a arranged to prevent excessive current in transistor 1a except during the start of each conductive period of the transistor 1a. As described, a control circuit 2 drives the main transistors 1a, 1b in push-pull via driver transistors 3a, 3b. The transistors 1a 1b are protected against over-current due to saturation of transformer 6 or smoothing inductor 11 by means of respective current transformers 17a, 17b the outputs of which are rectified at 19a, differentiated at 21a and, during over-current conditions, turn on transistor 22a which inhibits the control circuit 2. A clamping transistor 29a is turned on by means of a monostable multivibrator (not shown) in control circuit 2 at the beginning of each current pulse so as to prevent spurious operation of the protection circuit by the capacitance discharge surge. Diodes 25a, 26a clamp any negativegoing signals. Items 20a-29a may be made common to both protection circuits for the two transistors 1a, 1b. A conventional current limit circuit and a current balance circuit may be incorporated. A volatage regulator 15 may be included to control the mark/space ratio..
Patent GB-1534575-A (GB)
Title: Double loop knit fabric machine and method
IPC: D04B9/12
Filed: 1976-04-21
Abstract: 1534575 Knitting machines JUMBERCA SA and V J LOMBARDI 21 April 1976 [21 April 1975] 16139/76 Heading D1C In a latch needle knitting machine for producing terry cloth fabric, provision is made for controlling the extent to which latches can open so as to prevent the severing of these loops. An additional jack 30 may be provided in the needle trick having an end 30b which slides in a slot 27 in jack 26 and an end 30a which engages under the latch to prevent it from opening fully and is controlled by a cam. Two separate sinkers 32, 36 are provided in each trick of the sinker ring on which the back and front loops are respectively formed. In another arrangement,' the needle latches are prevented from opening fully by members 202 sliding in the tricks with the needles. Single sinkers 198 are provided having a central ledge 200 and a projection 198 of similar height at their ends and members 180 are provided sliding in tricks in a dial over which the loops are formed. In a modification members 180 have two levels of upper surface. The needles may alternatively have projections 230 on their shaft which prevent the latch from opening against the shaft.
Patent GB-515374-A (GB)
Title: Improvements in and relating to the manufacture of ammonium sulphate
IPC: C01C1/248
Filed: 1938-05-30
Abstract: 515,374. Ammonium sulphate. OGDEN, G., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. May 30, 1938; No. 16146. [Class 1 (ii)] [Also in Group IV] Refers to the saturator process, in which ammonia or annnonia-containing gas is passed into a solution of ammonium sulphate and sulphuric acid, and consists in adding to the saturator an oil and a wetting agent having defined characteristics in order to obtain crystals of a good white colour. The oil should be stable, non-volatile and of lower density than the saturator liquor; the wetting-agent should possess high wetting and frustrating power in acid, neutral or alkaline media, good stability to acids and in concentrated salt solution and ready solubility in concentrated salt solutions. Creosote oil -from coal or coke oven tars is preferred, but kerosene, diesel oil and middle oils may be used. Wetting-agents having one or more sulphuric groups are specified. The oil may be added with make-up acid or otherwise, and the wetting-agent may be added with the oil or at other convenient point, e.g., it may be added to water used to wash the crystals, which is then introduced into the mother liquor. As shown, a saturator 1 is fed with mother liquor of sulphuric acid and ammonium sulphate from the tank 3 which liquor overflows through a seal pot 5 into a.tank 6 from which the mother liquor is recirculated to the tank 3 and made up with necessary acid. Ammonia-containing gases are introduced through the pipe 9 and waste gases leave by the pipe 10. A mixture of oil and wetting-agent is fed by a pipe 13 to a small annular trough 12 and overflows into the mother liquor. The oil is withdrawn from the. tank 6 by an overflow 14, purified and returned. Ammonium sulphate crystals are removed from the bottom of the saturator by an elevator 11, drained and centrifuged and the mother' liquor. therefrom returned to the saturator. .Specification 18,559/14, [Class 1 (ii)], is referred to.
Patent GB-693151-A (GB)
Title: Improvements in or relating to the suspension of reciprocating screens in screening apparatus
IPC: B07B1/46
Filed: 1951-07-11
Abstract: 693,151. Sifting apparatus. MIAG VERTRIEBSGES. July 11, 1951 [July 12, 1950], No. 16399/51. Class 117 In a suspension arrangement for reciprocating screens the screen frame 2 is pivotally mounted on supporting arms 3 each adjustable in length and pivotally connected at 6 with link arms 7 rotatably adjustable about fixed axes 9 by a handle 8. Supporting and link arms connected in pairs are provided at each end of the screen. The inclination of the screen is read off on a scale 10. Turnbuckles 5 on the supporting arms adjust the length of the arms and can adjust the inclination of the screen to a basic horizontal position.