baber/WOPTO huggingface dataset:
Patent GB-363890-A (GB)
Title: Improvements in or relating to screw propellers
IPC: B64C11/48
Filed: 1931-02-16
Abstract: 363,890. Screw propellers. SCHALLERT, R., 1463, 3rd Avenue, New York, U.S.A. Feb. 16, 1931, No. 4854. [Class 114.] The semi-circular plane blades of a screw propeller are attached to the shaft at angles of from 35-45‹ and have their alternate blade tips bent over. A shaft 10 carries plane blades 11, 12 of semi-circular form which are set at an angle of 45‹ thereto. A partial radial slit 13, 14 is made in each blade and the tips 19, 21, 23, 25 are bent over so as to catch the fluid passing to the propeller. Each blade may have more than one radial slit and in each case it is the alternate tip that is bent over. The tips may be reinforced or strengthened by external ties or by thickening, and in the latter case preferably by thickening to a streamline or aerofoil section such as 19, Fig. 6.
Patent GB-754143-A (GB)
Title: Valve actuating mechanism
Inventor: SETKA RAYMOND PHILLIP
IPC: F16K31/524
Filed: 1954-02-18
Abstract: 754,143. Valve actuating mechanism. CRANE CO. Feb. 18, 1954, No. 4856/54. Class 135. A valve having a slidable stem 12 may be opened by a series of hammer-like impacts by mechanism comprising a lever arm 21 pivotally connected at one end to a link 23 itself pivoted to a part of the valve, a hammer block 18 attached to the upper end of the stem 12, and impacting means slidably engaging the stem and adapted to abut the lower surface of the hammer block in the course of the valve opening movement, the impacting means having an angular portion pivotally engaging the lever arm 21 directly. Fig. 1 shows a gate valve having a closure member or wedge 9 connected to the stem 12 and co-operable with seat rings 11 in a housing 1. The stem 12 is slidable in a bonnet 3 secured to the housing 1 by a U-shaped bolt or clamp 4 and nuts 8. The impacting means comprises a lifting link 26 having two arms at right-angles. The vertical arm is pivoted by a bolt 27 to the lever arm 21 and the other arm has a bifurcated collar 28 engaging the stem 12. The collar 28 may be clamped to the stem 12 to lock the whole mechanism by a nut having a handle 36 and screwing on to a bolt 35. The link 23 is pivoted to the valve housing or to a part 25 clamped thereto. The lever arm 21 may engage the top of the hammer block in a series of blows if the valve sticks in the open position. Due to the position of the bolt 27, the lever arm 21 operates with greater leverage when the valve is being opened than when it is being closed. In a modification, the link 26 is replaced by a three-armed link of inverted T-shape one of the arms having a collar part which may be clamped to the link 23 to lock the mechanism against movement.
Patent GB-1048093-A (GB)
Title: Improvements relating to negative impedance converter circuits
Inventor: DREW ANTHONY JOHN
IPC: H04B3/18
Filed: 1964-02-05
Abstract: 1,048,093. Negative impedance converters. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Feb. 2, 1965 [Feb. 5, 1964], No. 4890/64. Heading H3T. To correct for parasitic impedances and offset voltagers or currents in a negative impedance converter, the two-port converter circuit of the invention is provided with one or more of (a) a source of D.C. potential connected to a terminal of the second port to render the potentials at each terminal the same, (b) a correcting element, of similar value to the series parasitic impedance and/or offset voltage appearing at the first port, which is connected in series with the second port, ((c) a correcting element, of similar value to the shunt parasitic impedance and/or associated offset current appearing at the second port, which is connected in parallel with the first port. In the circuit of Fig. 7 the correcting impedance is resistor R 11  and resistor R 5  in the collector circuit of transistor T 1  serves as an extra D.C. source to correct the offset current appearing at the second source. At the second port the series correcting impedance is resistor R 7  and the output port terminal potentials are rendered equal by Zener diode ZD. The conversion ratio of the circuit, preferably - 1, is determined by the ratio of R 1  to R 2  and may be altered by the resistors R 8 , R 9 , R 10  acting to alter the effective impedance of R 2 . R 9  is altered to maintain the potential charge across R 8  equal to zero. A simplified version of the circuit of Fig. 7 is illustrated in Fig. 8 (not shown). In Fig. 9 (not shown) the resistors R 3 , R 4  of Fig. 7 are replaced by transistors T 3 , T 4  and the current and voltage correcting elements comprise transistors T 5 , T 6 . The single transistors of the circuits may be replaced by Darlington compound transistors (Fig. 10, not shown). A further alternative (Fig. 13, not shown) is a circuit based on a bridge arrangement (Fig. 11. not shown).
Patent GB-180397-A (GB)
Title: A process for conveying the mouth dust and other fine ores in blast furnace operations
IPC: B01J8/00
Filed: 1921-02-11
Abstract: 180,397. Diepschlag, E. Feb. 11, 1921. Pneumatic conveyers.- Blast-furnace mouth-dust, fine ores, and like materials used in blast furnace operations, which are of such a degree of fineness that they are pervious to air or gas, are conveyed by gas under pressure. An apparatus for the purpose comprises a receptacle 1 with a delivery-pipe 3 leading from a point near the bottom thereof, through which the material is forced by gas under pressure supplied through the connection 4. A number of gas inlets may be arranged at various levels to prevent packing of the material in the receptacle. Waste furnace gases are preferably used for conveying oxidizable ores. Reference has been directed by the Comptroller to Specifications 132,523 and 135,842.
Patent GB-728747-A (GB)
Title: Improvements in or relating to methods of and means for anodizing metal articles
Inventor: BERNSTIEL ERWIN
IPC: C25D11/04
Filed: 1952-02-26
Abstract: 728,747. Anodizing. RHONDDA PLATING WORKS, Ltd. Feb. 11, 1953 [Feb. 26, 1952], No. 4960/52. Class 41. A metal article is anodized by immersing it or a part thereof in an anodic bath, anodizing the article, scraping the oxide layer formed on the article from a portion thereof whereby to provide a sufficiently good electric conduction through such portion, and feeding an anodizing electric current through the scraped portion thereof. The invention is described as applied to anodizing electrically interconnected slide fastener elements attached to a carrier tape. As shown, slide fastener elements 3 are attached in groups to tapes 1 of considerable arbitrary length and having thickened edges 2. Each thickened edge 2 comprises a plurality of metal wires 4 by which the elements 3 are electrically interconnected. A plurality of the tapes 1 with their fastener elements interlocked are passed parallel to each other in a zig-zag path around driven guide rollers 12 and rotatable idling rollers 31, the rollers 12 are mounted in brackets of insulating material above the anodic bath 11 and are connected by slip rings 32 to the positive terminal of an electric supply, the negative terminal of which is connected to the metallic tank 10. Electric resistances 34, 35 and 36 are inserted in the leads to the first three rollers. Knurled rollers 20 rotating in the opposite direction to the guide rollers 12 and at a higher speed scrape the adjacent side of the fastener elements 3 between each successive immersion in the anodizing bath. The tapes on leaving the bath for the last time pass through a wringer 25 which removes electrolyte. According to one modification, the knurled rollers are so arranged that they scrape the periphery of the adjacent driven guide rollers and idling counter-rollers, preferably of elastic material, press the tapes against the guide rollers. According to a further modification, rotating wire brushes replace the knurled rollers to scrape the fastener elements and the respective guide rollers. If metallic knurled rollers or wire brushes are used, they may be electrically connected to the terminal to which the guide rollers are connected to provide additional points of electric contact. Alternating current may be used instead of direct current, the resistances 34-36 being replaced by impedances such as choke coils.
Patent GB-1377723-A (GB)
Title: Concealed sliding clasp fastener
IPC: A44B19/36
Filed: 1973-01-31
Abstract: 1377723 Sliding clasp fasteners YOSHIDA KOGYO KK 31 Jan 1973 [7 Feb 1972] 4978/73 Heading E2S  A concealed type sliding clasp fastener 10 comprising inwardly folded tapes 11, 12 carrying fastener elements E formed from a plastics filament, and a slider 14 movably mounted on the tapes for coupling and uncoupling the elements, is provided with a retaining means 21 on the elements adjacent a terminal end thereof and having opposite side edges disposed for pressure engagement with a side wall 23 of a guide post 16 and an inner side wall 17 respectively of the slider to lock the slider against retractive movement in the fully closed disposition of the fastener. As shown, the retaining means 21 is constituted by a deformed portion 22 of the row of elements E. A re-inforcing strip 24 of thermoplastics material may be used to increase the volume of the flattened element portions.
Patent GB-252673-A (GB)
Title: Method for the production of rubber goods directly from latex
IPC: C08J5/02
Filed: 1926-02-23
Abstract: 252,673. Anode Rubber Co., Ltd. May 30, 1925, [Convention date]. Moulding by dipping; moulding indiarubber.- In the production of rubber goods by deposition from latex on porous moulds, means promoting the deposition are applied to the moulds on the side not in contact with the latex. Such means may include reduced pressure or heating, air circulation or the like to induce evaporation and promote the passage of water through the mould, or water absorbing substances such as gypsum, cement may be used. Agents such as aceticacid, calcium or zinc chloride, which diffuse through the mould and coagulate the rubber, may also be employed. The process is applicable to latex containing conditioning substances and also to concentrated latex.
Patent GB-546898-A (GB)
Title: A new and improved method of producing an alloy
IPC: C22C5/04
Filed: 1942-04-20
Abstract: 546,898. Alloys. LEWIS, A. M. April 20, 1942, No. 5212. [Class 82 (i)] Alloys of platinum with 1-95 per cent. of tungsten or molybdenum or both are made by filling a platinum tube with a powdered mixture of platinum and tungsten, platinum and molybdenum, or platinum, tungsten and molybdenum, compressing the mixture, closing and sealing the tube, and heating it to whiteness. It is then hammered, rolled, or swaged until below 'red heat, resulting in a homogeneous, malleable, and ductile alloy.
Patent GB-490939-A (GB)
Title: Improvements relating to loading and conveying receptacles
Filed: 1937-02-23
Abstract: 490,939. Anti-breakage fittings for hoppers, shoots, bunkers, &c. DEMAG AKT.-GES. Feb. 23, 1937, No. 5348. Convention date, Feb. 24, 1936. [Classes 78 (i) and 78 (iv)] [Also in Group X] Bunkers, storage chambers, shoots, and hoppers of the kind provided with a hinged flap which is lowered gradually against the resistance of a fluid - pressure cylinder by the weight of superincumbent material in charging, are constructed so that the lower portion of the receptacle under the flap forms an air-pressure chamber with controlled release, thus offering sufficient resistance to the downward movement of the flap for the fluid-pressure cylinder to be made smaller and lighter, if not entirely dis pensed with. The Figure shows a flap B pivoted to the side walls of a skip and connected to the pneumatic or hydraulic cylinder 3. The portion D of the skip forms an air-cushion chamber closed by the bottom door C at the lower end and by the flap and the charging material at the upper end. An air-escape opening 6 fitted with regulatable slide valves or like controlling-means varies the resistance offered by this chamber to the movement of the flap. The chamber D offers the main resistance to the downward movement of the flap, the function of the cylinder 3 being mainly to raise the unloaded flap to the dotted line position.
Patent GB-721897-A (GB)
Title: Improvements in or relating to cleaning head structure
IPC: A47L13/12
Filed: 1952-02-29
Abstract: 721,897. Brushes; mops; pads; squeegees. TRINDL, J. H. Feb. 29, 1952. No. 5356/52. Class 19. A cleaning element has a fabric sleeve attached to its top and is secured to a cleaning tool head by means of a member which may be passed through the sleeve and detachably secured at one end to the head. A sponge 12 or other cleaning element such as a brush Fig. 8 (not shown), a dust mop, a wax applicator or polisher has a canvas sleeve 29 cemented to its back and through this is inserted a rectangular wire frame 19 (or a flat sheet) pivoted at one end 20 to a cleaning head 10 and detachably secured thereto at the other by a clip 25. The base of the head is recessed to receive the frame and a straight slot in one end receives a squeegee 15 or a brush having a resilient metal channel back normally bowed so that it is held in the channel by virtue of its tendency to return to its bowed form. The frame may alternatively be held by clips at both ends.
Patent GB-285792-A (GB)
Title: Sheet-feeding device for printing presses
IPC: B65H9/12
Filed: 1928-02-20
Abstract: 285,792. Welter, N. Feb. 19, 1927, [Convention date] Pile supports.-In connection with means for feeding sheets automatically from a pile to a multi-colour printing- machine, the pile table 11 is automatically raised as requined by means of nuts engaged by screws 13 driven by bevel gearing from a shaft 15 operated intermittently by ratchet mechanism controlled by a feeler 25 resting on the pile. This feeler is part of a bell-crank lever 24, 25 connected by a rod 23 to a partly cylindrical guard 22 formed with an aperture to permit operation of the ratchet by a pawl 18 on a swinging arm operated by an eccentric-actuated rod 21. When the pile is high, the guard 22 marks the action of the pawl, but this is allowed to operate when the pile is low. Sheet-registering devices; gripper mechanism; sheet-carriers.-To prevent crumpling of the sheets as they reach the front stops, they are advanced thereto by bands 1 driven by a, pulley 3 operated by variable gearing so as to slow down the sheets near the front stops. The pulley 3 is driven by a chain 7 passing over an eccentrically mounted driving-sprocket 8, the slack of the chain being taken up by .a tensioning pulley 10. Alternatively, the chains may be driven by elliptical gearing. After the sheets reach the front stops they are registered laterally against stops 37, Fig. 3, against which they are held by means of grippers 33 on a laterally movable slide 27 which is moved between stops 28, 29 by a cam-operated reciprocating rod 30 to which is clamped a carrier 31 fitted with a groove 39 adapted to receive a nose 38 on the gripping lever 33 formed with a slot 34 embracing a pivot 35 on the slide 27. A spring 36 maintains the gripper 33 raised as the slide 27 moves to the right in Fig. 3. Towards the end of this movement the stop 37 on the slide 27 engages the edge of the sheet, and the slide 27 then engages the stop 29, and the gripper is then moved about its pivot by the carrier 31, which finally engages the nose 38, thus causing the gripper to hold the laterally-registered sheet. The carrier 31 and slide 27 then return to the left, and when the slide 27 is held by stop 28 the carrier 31 advances beyond the stop 28 and the gripper is opened by spring-action when its nose 38 is released.
Patent GB-1077502-A (GB)
Title: Improvements in or relating to water-detecting means
Inventor: ASHWORTH NORMAN
IPC: F22D11/00
Filed: 1964-02-07
Abstract: 1,077,502. Conducting liquid switches. ENGLISH ELECTRIC CO. Ltd. Feb. 5, 1965 [Feb. 7, 1964; Nov. 10, 1964], Nos. 5369/64 and 45756/64. Heading H2B. [Also in Division F4] A switch controlling the fuel supply to a burner (55, Fig. 1, not shown) heating a steam generator comprises an insulated electrode (21, Fig. 2, not shown) projecting into a chamber (16) which is located in the pipe (56) connecting the heating coil (51) of the generator to a steam separator (58). The chamber normally contains water which bridges the tip (17) of the electrode to the casing (11) of the chamber. Failure of the water supply produces superheated steam in pipe (56) which evaporates the water in chamber (16) thereby opening the switch. Slightly modified electrode constructions are also disclosed (Figs. 3 and 4, not shown), in one of which the electrode may be copper.
Patent GB-1183691-A (GB)
Title: Improvements in or relating to the Production of Spheroidal Graphite Irons.
Inventor: STEPHENSON STEPHEN DAVID
IPC: C21C1/00
Filed: 1968-02-02
Abstract: 1,183,691. Making S.G. iron. STEEL CASTINGS RESEARCH & TRADE ASSOCIATION. Jan.23, 1969 [Feb.2, 1968], No.5408/68. Heading C7D. In the production of S. G. iron a bath which may have been produced e. g. in a cupola or electric furnace wholly or partly from iron or steel scrap, is first subjected to an oxidation boil to eliminate impurities; it is then deoxidized, and powdered graphite injected in a carrier gas such as nitrogen argon or air while the bath is maintained under reducing conditions, after which a spheroidizing addition such as nickel-magnesium, iron-silicon-magnesium, cerium or magnesium is made. The oxidation boil may be effected by oxygen lancing, by an oxy-fuel burner, or by the addition of the oxide of a metal such as iron, nickel or chromium which is desired in the product.
Patent GB-1136031-A (GB)
Title: Rotary hydraulic machines, such as pumps, turbines and pump-turbines
Inventor: DESBAILLETS JACQUES
IPC: F03B11/00
Filed: 1966-02-08
Abstract: 1,136,031. Centrifugal pumps; hydraulic turbines. DOMINION ENG. WORKS Ltd. Feb. 8, 1966, No. 5448/66. Headings F1C and F1T. In a hydraulic turbine, pump or pump-turbine in which fluid friction on the runner is reduced by introducing air into an annular space 22 adjoining the band shroud 17, the space 22 is bounded by an annular baffle 20. When injection of air through a pipe 28 commences, centrifugal separation takes place between the water and the air in the space 22, so that the water is expelled radially outwards from the space. In addition, an air-water interface 48 is established beyond the radially inner end of the space 22, between a radially extending annular surface 46 of an annular flange 31 projecting radially from the band shroud 17 and an adjacent parallel surface 45 on the baffle 20, the flange 31 acting as a centrifugal separation for this purpose. After the water has been expelled from the space 22, some air leaks from the space at its radially outer end and collects on the other side of the baffle 20 in an annular pocket bounded by an annular flange 42, as shown. The resultant depression of the water level in an annular space 23 reduces the water pressure between the surfaces 45, 46, thereby allowing the air-water interface 48 to move to the outer periphery of the centrifugal separator flange 31, as shown. In the stable condition now attained, water leaking from the runner periphery and passing, via space 23 and an annular seal space 30, to the draft tube 15 undergoes an increase in pressure head in an annular diffuser passage 41, this increase combined with the pressure head due to the height of water in the space 23 above the centrifugal separator flange 31 balancing the pumping action of the latter, and excess air leaks from the space 22 by breaking through the air-water interface 48 and passing via the seal space 30 to the draft tube 15. An annular wall 34 prevents air in space 23 from escaping through the seal space 30. Holes 37 permit interchange of air between the spaces 23 and 22 to allow the water level in the space 23 to change in response to change in operating conditions. The diffuser passage 41 may be omitted or replaced by substantially parallel annular passages containing radial vanes which are tapered in the direction of flow to provide diffusion. A similar arrangement is provided adjacent the crown shroud.
Patent GB-686400-A (GB)
Title: Improvements in or relating to clamping devices
IPC: F16B2/18
Filed: 1950-03-04
Abstract: 686,400. Brackets. GNOME PHOTOGRAPHIC PRODUCTS, Ltd., LOEBSTEIN, H., and ENGELHARD, N. N. May 28, 1951 [March 4, 1950], No. 5524/50. Class 52(v) [Also in Groups XX, XXIV and XXV] A sleeve member 1a carrying a bracket 1 on which may be mounted an enlarger is adjustably clamped to a supporting column 2 by a plunger 3 slidably mounted in a bore 4 in the sleeve and adapted to be forced against the column by rotation of a cam 5a. A head 3a prevents loss of the plunger 3 when the sleeve is removed from the column and engages in a groove 5b in the spindle 5 to locate it axially. The bottom of the groove provides the cam 5a. A spring 8 urges the spindle 5 in the locking direction, a lever 7 being provided to rotate it to release position.
Patent GB-1491826-A (GB)
Title: Electronic instrument
IPC: G04C3/00
Filed: 1976-02-12
Abstract: 1491826 Calculators DAINI SEIKOSHA KK 12 Feb 1976 [14 Feb 1975] 05563/76 Heading G4A [Also in Divisions G3 and H1] In an electronic instrument provided with a display device and a plurality of push-button switches in a casing, an electrically conductive resilient sheet 9 forms a common contact of the switches and acts as a gasket to keep water out of the casing. Each button 4b, when depressed, deflects a corresponding portion of the sheet 9 through an aligned aperture 8a in an insulating sheet 8 to touch a respective contact 6a on printed circuit board 6. As described the instrument is an electronic watch combined with a calculator controlled by the push-buttons. The latter can be located on one side of the display or spaced around it. The sheet 9 is compressed at points A, B by case portion 3b and by a glass fixing ring 2b.
Patent GB-776054-A (GB)
Title: Single or multi-phase converter set
IPC: H01J13/48
Filed: 1953-02-27
Abstract: 776,054. Converting. AKT.-GES. BROWN, BOVERI & CIE. Feb. 27, 1953 [Feb. 28, 1952], No. 5564/53. Class 38 (2). [Also in Group XL (a)] A single- or multi-phase converter set comprises single, anode converter elements, with or without control grids, with a vapour discharge gap in metal containers a1, a2, a3, the cathodes c1, c2, c3 of the elements being supported by and in electrical connection with a metallic box-shaped supporting frame d insulated from earth and to which current conductors are connected, a cooling set with motor-driven pump f and cooler g for closed circuit cooling of the elements, and auxiliary devices e1, e2, e3 for ignition, excitation and regulation of the current passing through the elements, the pump f and cooler g and the auxiliary devices e1 e2, e3 being located within the frame d. Collecting pipes h2, h3, either above or between the anodes b1, b2, b3, are located above the containers a1, a2, a3, for conducting the cooling medium to and from the pump f, cooler g, and the converter elements. A vacuum pump m may be located outside the frame d, a vacuum pipe n connected to the converter elements being arranged above the containers a1, a2, a3 and serving as a support for the leads k1 k2, k3 to the anodes b1 b2, b3 by means of the insulators o1, o2, o3. The vacuum pipe n can rest on the cooling medium pipe h3 by insulators p1, p2. A cooling medium reserve tank i can be mounted on or in the frame d or can be located between the containers a1, a2, a3. The frame d can be provided with doors for inspection, and replacement of the auxiliary devices and parts of the cooling set, and the devices and parts can be mounted on the doors which can be swivelled. In the absence of a vacuum pump the anode leads k1, k2, k3 are mounted on one or both cooling medium collecting pipes h2, h3.