baber/WOPTO huggingface dataset:
Patent GB-318265-A (GB)
Title: Improvements in electric rectifying devices and method of making the same
IPC: H01L25/07
Filed: 1929-08-31
Abstract: 318,265. Lazarus, M. Aug. 31, 1929. [A Specification was laid open to inspection under Sect. 91 of the Acts, Sept. 2, 1929]. Contacting-solid resistances. -The positive plate of a static-contact rectifier is made from an alloy of copper and silver, preferably in the proportion of 25 to 40 ounces of silver to the ton of copper, provided with a rectifying layer of copper and silver oxides. The plates are formed bv a process consisting of heating in an atmosphere containing ozone, preferably in an electric furnace. until the plates are heated to between 1000 and 1030‹ C., then holding them in the open air until they reach a cherry red colour, and finally quenching quickly in a bath containing water and alcohol, glycerine, or a phenolic or cresolic ingredient with a surface layer of oily liquid such as turpentine. By this means the oxide laver is annealed and part of the outer surface thereof is reduced to the metallic state and may be provided with a coating of tin or other metal by electroplating, which facilitates the making of good electric contact between the plates. Fig. 1 shows a rectifier comprising positive plates 1 alternating with negative plates 2. The negative plates 2 may be of tin, brass, or other metal having the desired stiffness, and are provided, as shown in Fig. 2, with embossed contact portions X, which are raised slightly from the plane of the plate and may be partly severed from the body of the plate to allow free access of oil in which the rectifier unit is immersed. The plates are provided with ears or lugs 11 having slots 12 which are slipped over insulated rods 13, Fig. 1, provided with nuts 14 by which the plates are clamped together. The bodies of the plates may be slightly separated to permit ventilation and may have central apertures 15 to permit circulation of air. An insulated tube 16 may be provided to permit circulation of water or air, or the whole assembly may be immersed in oil &c. When the plates are self-cooled, the central apertures 15 may be omitted, or may be replaced by central contact bosses similar to the portions X. The rectifier shown in Fig. 1 comprises four rectifying units PI - - P4 each comprising a positive plate 1 between two negative plates 2, which are arranged with their projections X in contact with opposite sides of the positive plate 1, these plates having an oxide film on both sides. The negative plates 2 of each unit are connected by bent metal straps C. Insulating plates IL, I2 separate the unit P1 from the adjacent units. P2, P3. Metal strip connectors J1 - - J4 permit connection to the secondary winding T1 of a transformer T so as to obtain full-wave, rectification. Metal strips S, S1 form terminals for the load circuit. Additional rectifying units may be added by assembling on the rods 13, or on other rods parallel thereto, plates 27 being provided in the latter case for clamping the whole assembly together.
Patent GB-738765-A (GB)
Title: Improvements in or relating to power operated vegetation cutting apparatus
IPC: A01G3/04
Filed: 1952-10-22
Abstract: 738,765. Reaping-machines. BOMFORD, D. R. Oct. 22, 1953 [Oct. 22, 1952; Oct. 29, 1952], Nos. 26547/52 and 27239/52. Class 6 (3). A power-driven tractormounted reaping-machine, of the type having a reciprocating cutter 30 mounted on a carrier 43, 44, 47 attached to the tractor so that the direction of reciprocation of the cutter is variable, is characterized in that the carrier is attached to the tractor by means including a universal joint (Fig. 3) which permits the carrier to swing either about a vertical axis or about a transverse horizontal axis, springs 49, 54 being provided for hold. ing the carrier against either of said movements until subjected to a predetermined load. The machine is carried on one end of a cross-shaft 18 incorporating adjustable arms 20, 25 secured to it by U-bolts 22 and connected to the ends of the power-lift linkage 11, 16 on the tractor; beams 29-on the cross-shaft support a motor for driving the cutter through the pulley 83 on the crank-shaft. A bracket 59 rotatably mounted on the crankshaft 45 supports the cutter 30 which is driven by a crank-disc 60 and pivoted Links 63, 66, 71. An arm 80 rigid with the bracket 59 is connected by a cable 81 to a hand-winch 82 on the tractor for fitting the cutter about the shaft 45. The crank-shaft is mounted on the cross-shaft 18 by a joint yieldable in either of two perpendicular directions. A bearing 44 for the shaft 45 is secured to an L-shaped bracket 38, 43. The bracket is swingably received on an L-shaped shaft 34, 37 on which it is retained by plates 39, 40. The vertical limb 34 of the shaft is similarly retained by plates 33 on a member secured to the cross-shaft 18. Leaf-springs 49, 54 terminating in arcuate yokes 51, 55 are mounted between the limbs of the L-shaped bracket 38, 43 and rollers 48 carried by the L-shaped shaft. Screws 53, 56 adjust the pressure of the yokes against the rollers; a load in excess of this pressure destroys the contact between the yoke and roller permitting the joint to swing about the other limb of the joint.
Patent GB-703627-A (GB)
Title: Improvements in or relating to betatrons
IPC: H05H11/00
Filed: 1950-10-31
Abstract: 703,627. Magnetic induction accelerators. SIEMENS-REINIGER-WERKE AKT.-GES. Oct. 31, 1950 [Oct. 31, 1949], No. 26565/50. Class 39(1) By disturbing the 1:2 condition of a betatron during injection the electrons are delivered over a spiral path into the stable equilibrium orbit so as to obtain a uniformly distributed large space charge filling. An auxiliary coil 5, Fig. 1, surrounding only the accelerating field may be fed with a current pulse of the form indicated by 13 in Fig. 3a. The effect of the resulting field, shown in the right-hand half of Fig. 1, superimposed on the normal betatron flux is to maintain the accelerating flux 14, Fig. 3b, constant over a time t 1 , while the guiding flux 15 increases rapidly. Preferably however, the guiding field is maintained constant, the electrons being introduced from within the equilibrium orbit. In another embodiment a saturable magnetic core having a right-angled magnetization curve bridges the betatron central air gap. The rapid reversal of magnetization in the core when the betatron exciting current passes through zero, effects a brief retardation of the increase of the guiding field in relation to that of the accelerating field. The reversal of magnetization of the core may be assisted by means of a surrounding coil fed with a current pulse. The coil may carry a bias current so that the period when the guiding field is maintained constant may be most favourably chosen.
Patent GB-441298-A (GB)
Title: Improvements in or relating to the cutters of mowing and reaping machines
IPC: A01D34/16
Filed: 1934-09-17
Abstract: 441,298. Reaping and mowing machines. POPE, W., 181, New Street, Great Torrington, Devon. Sept. 17, 1934, No. 26687. [Class 6 (iii)] The knife bar 5 is provided with a tongue or like projection 8 at its forward edge to engage below co-operating shoulders 10 on the finger bars 2 thus holding the blades 4 down on the fingers or the ledger blades 7. The rear edge of the knife bar abuts against an adjustable plate 12 which may be slightly chamfered on its upper face to engage under the rear end of the blades 4. In a modification, the rear of the knife bar 5 is chamfered to engage a corresponding chamfered edge on an adjusting plate which thus wedges the blades down on the finger bars. Central and lateral channels 16 are formed in the lower sides of the blades to permit the escape of grass juices, these channels leading to outlets 17, 18 in the blades.
Patent GB-694160-A (GB)
Title: Preparation of artificial filaments, yarns, ribbons and like filamentary materials
IPC: D01D1/04
Filed: 1950-10-04
Abstract: Artificial filaments, yarns, ribbons and like filamentary materials are obtained by continuously passing a flexible band of indefinitely great length and uniform cross-section and of a filament-forming material, e.g. polyamides, polysulphonamides, polyurethanes and polytriazoles, through feed means at a constant rate into a melting tube leading to a spinning jet, jamming of the band in the tube being prevented by maintaining <PICT:0694160/IV (a)/1> the walls of the tube at a higher temperature near the entrance than over the remainder of the length of the tube.  As shown, the band of filament-forming material is passed through guide 11 and is forwarded at a constant rate by feed wheels 12, 13 through guide 14 into a melting tube 18 provided with independent electric heating coils 21, those near the tube entrance being maintained at a higher temperature than the others.  Alternatively, or in addition, the walls near the entrance may be made of higher thermal conductivity than the remainder, e.g. by being of different material and/or of thinner cross-section or by providing a layer of insulating material around the remainder of the tube. The molten material enters well 25 from which it is forced through filter 27 and spinning jet 28.  The melting tube entrance is flushed with an inert gas, e.g. nitrogen, from opposed channels 23.  A nitrogen stream from ring 31 also blankets the face of the spinning jet.  Between the feed wheels and the melting tube, the band may be passed through a water-cooled collar 16, as described in Specification 694,123.  The band and central passageway 19 of the melting tube may be of rectangular, circular, oval or other cross-section.
Patent GB-1192934-A (GB)
Title: Steel
Inventor: HAYDEN HOWARD WAYNE JR
IPC: C22F1/10
Filed: 1967-06-09
Abstract: 1,192,934. Superplastic steel. INTERNATIONAL NICKEL Ltd. June 9, 1967 [June 21, 1966; May 15, 1967], No.26776/67. Heading C7A. A steel containing up to 0À08%C is characterized by a fine grained micro-structure comprising austenite or martensite in a ferrite matrix in which the transverse mean path between the austenite or martensite particles is so short (e.g. not above 8 microns) that when the steel is strained at 0À16-0À26 inch inch minute at 925-980‹ C. its tensile elongation is at least 150%. The steel may comprise Cr 18-35% Ni 2-12% C 0À08% max. Ti up to 1À5% # (a) up to 1À5% total V up to 1% # (b) Ti + V is at least Mn 0À1% 4 x (%C-0À03) Si 0-1% (c) For Cu 2% or more Mo 0-3% Mn does not exceed 0À3% Co 0-2% and Si does not exceed Cu 0-2À5% 0À4% (d) 1À17% (%Ni) + 13À3 # %Cr + %Mo # 3À5(%Ni) + 11 the balance, apart from up to 1% in total of Mg, Zr, Al, Ce, B and Hf and the lowest amounts possible of P, N, S, O and H, being iron. Steels as above containing 23-35% Cr and 4À5-12% Ni are said to be novel. The desired micro-structure is made by plastically deforming the steel (e. g. by 50%) in the two phase temperature region, the steel having a ferrite solid solution structure containing precipitable austenite, and heating the steel within the said region during or after the deformation to recrystallize the ferrite and precipitate the austenite. The alloys may be welded using a matching filler wire.
Patent GB-831492-A (GB)
Title: Improvements in magnetic transducers
IPC: G11B5/265
Filed: 1956-09-03
Abstract: 831,492. Recording heads. INTERNATIONAL BUSINESS MACHINES CORPORATION. Sept. 3, 1956 [Sept. 6, 1955], No. 26840/56. Class 40 (2). A magnetic transducer 10 having a pair of active portions 11, 12, capable of recording upon or reproducing from a magnetic record 27, is characterized in that the portions are adapted to produce or reproduce from record paths of different widths formed about a common axis on the record 27. The individual core 14, 15, 17 and 31, 33, 34 of each active portion 11, 12 is integral with and extends from one end of a common core part 13 to terminate a predetermined distance 19 or 35 from the other end of the core part 13. The width of the core parts 14, 15, 17 and therefore the air gap is greater than that of the core parts 31, 33, 34 and air gaps 35.
Patent GB-431103-A (GB)
Title: Process of and apparatus for producing light structural slabs
IPC: B28B1/52
Filed: 1934-09-19
Abstract: 431,103. Moulding fibrous cement slabs in rolling-machines. SCHNEIDER, (nÚe STURM), L., 4, Forststrasse, Kahl-on- Main, Germany. Sept. 19, 1934, No. 26955. Convention date, Sept. 25, 1933. [Class 87 (ii)] [See also Group X] Light fibrous cement slabs are produced by passing a band, formed by stitching together wood fibres, straw, reeds, &c., through a slurry of magnesite or Portland cement, cutting off lengths and placing them in moulds to set. The wood fibres &c. are stitched together with jute or hemp yarn extending in the longitudinal direction and may be reinforced by longitudinal wires or woven wire fabric. The band q is led by guide rollers f through a trough-shaped box d containing the cement slurry and excess liquid is squeezed out by rollers h. The gap between the rollers is adjustable, and the pairs of rollers may be geared together and driven by a hand-crank l or a mechanical drive. After passing over the roller i the band is cut into lengths and laid in moulds p which run on a table n. Several slabs may be superposed in the moulds p before setting or two or more superposed bands q may be run through the apparatus.
Patent GB-825115-A (GB)
Title: Dentifrice for use in oral hygiene
IPC: A61K8/64
Filed: 1957-08-28
Abstract: A dentifrice comprises at least 50% by weight of casein, preferably rennin casein.  The major part of the remainder may be lactose. Vitamin D and calcium phosphate may be present.  The composition may be prepared in the form of a paste, powder, tablet or troche.  A preservative such as a fluoride or borate, e.g. sodium borate, may be added.  The binder may be gelatin or gum acacia.
Patent GB-438548-A (GB)
Title: Improvements in the manufacture and production of polymerisation products of acetylene
IPC: C07C2/38
Filed: 1934-09-21
Abstract: In the manufacture of monovinylacetylene and other acetylene polymerization products by treating acetylene with acid aqueous cuprous salt solutions, use is made of cuprous salt solutions not containing a nitrogenous base or a salt thereof, but containing a salt or salts of an alkali or alkaline-earth metal, including magnesium, or of a metal of the third periodic group, including the rare-earth metals; the halides of the specified metals are preferred. The acidity of the solution may be adjusted by addition of an inorganic or organic acid, and the oxidation of the cuprous salt may be restrained by addition of copper or by the use of apparatus made wholly or in part of copper.  Concentrated or dilute acetylene may be used.  Examples are given in which monovinylacetylene and other acetylene polymerization products are obtained with the aid of aqueous cuprous chloride solutions containing (1) sodium chloride and copper powder, (2) sodium silicate, (3) lithium chloride and copper powder, (4) barium chloride and copper powder, (5) aluminium chloride and copper. Specifications 384,654 and 390,179 are referred to.
Patent GB-449286-A (GB)
Title: Improvements in and relating to starting and stopping devices for belt gearing
IPC: F16H7/14
Filed: 1935-10-02
Abstract: 449,286. Connecting and disconnecting arrangements for belt gearing. DEHN, F. B., 103, Kingsway, London.-(Chicago Flexible Shaft Co. ; 5600, Roosevelt Road, Chicago, U.S.A.) Oct. 2, 1935, No. 27211. [Class 80 (i)] Relates to a connecting and disconnecting arrangement more particularly for sheep shearing installations comprising a line of driving shafting 10 adapted to drive a number of shafts such as 20 when desired. According to the invention, a driven pulley 17 and an idler 16 are mounted on a channelled bracket 12 pivoted at 13 to the support 11 of the shaft 10, so that the bracket may be rotated to bring the driven pulley 17 into and out of engagement with the belt 22, the idler 16 remaining permanently in contact with the belt. A resilient stop 25 may be provided to retain the pulley 17 in the disengaged position shown. When the operative pulls down the casing 21 of the flexible driven shaft 20 to start the drive, the bracket 12 snaps past the stop, and rotates until the shaft 15 of the idler 16 comes against the upper side of the support 11. A cable 25 is used for pulling the bracket 12 back to the disengaged position.
Patent GB-460312-A (GB)
Title: An improved thermostat
IPC: G01K3/12
Filed: 1935-10-02
Abstract: 460,312. Thermal switches. JAMESON, R. P. Oct. 2, 1935, No. 27242. Convention date, Oct. 10, 1934. [Class 38 (v)] A thermal switch, suitable in some modifications for a fire alarm, comprises an expanding tube 1 adjustably carrying at its right hand end two adjusting rods 4 which bear against blocks 8 carried by blade springs 7, expansion of the tube 1 allowing the blocks 8 to pivot outwardly under the action of the springs, contact-control arms 9, 10 arranged beneath the rods 4 and carried by the blocks 8 moving apart at their right-hand ends so that contacts 15, 16 on the arms separate and a circuit between terminals 17 is broken. The arm 10 may also carry a forked spring blade contact adapted to engage two other contacts fixed to the arm 9 thereby connecting a terminal 26 through a conductor 25 to the two terminals 17. The tube 1 may be of brass and the rods 4 of brass or other metals of the same or different expansion as the tube. The metals of the two rods 4 may also differ. If the rods 4 are of the same metal as the tube, the device is specially suited for a fire alarm since it would operate by rapid heating of the tube 1, but not by equal heating of the tube 1 and rods 4. The rods 4 have screwed ends by which they may be adjusted.
Patent GB-834341-A (GB)
Title: Improvements in masted fork-lift trucks
IPC: B66F9/10
Filed: 1957-08-29
Abstract: 834,341. Masted lift trucks. HAUSER, R., and BENGEL, F. Aug. 29, 1957 [April 26, 1957; Aug. 7, 1957], No. 27262/57. Class 78 (3). Fork carriers d<SP>1</SP>, Fig. 3, extending the full length of a side-loading lift truck are mounted on a mast c movable over the part b of the truck frame a, b. More than two forks e, adjustable along the carriers d<SP>1</SP>, may be used. The mast c may be movable hydraulically or by a lever mechanism, e.g. lazy-tongs, and is tiltable slightly from the vertical. Wheels f and g are steerable and one or both is driven electrically or hydraulically or by an I.C. engine. All three wheels f, g, h can be slewed through 90 degrees for transverse movement of the truck, in which case wheel h, or alternatively wheels f and g, can be used for steering. In an alternative embodiment (Figs. 5 and 6, not shown), the frame b and wheel h are replaced by two frames at the ends of the truck, each with a supporting wheel, and the mast moves on guides between the frames. In another embodiment, Fig. 8, two masts k, l are provided, each movable over a transverse frame b<SP>1</SP>, b2, either independently or otherwise. In the latter case the fork carriers d<SP>1</SP>, d2 may be continuous over the two masts, and in the former case the distance between the frames b<SP>1</SP>, b<SP>2</SP> may be variable. In either case, one wheel in the middle of frame a may replace wheels f and g, and all wheels may be slewed through 90 degrees for transverse travel.
Patent GB-535380-A (GB)
Title: Improvements in or relating to method of and apparatus for making molded articles
IPC: B28B7/10
Filed: 1939-10-05
Abstract: 535,380. Moulding cementitious material. WITHEROW, W. P. Oct. 5, 1939, No. 27270. Convention date, Jan. 23. [Class 87 (ii)] Articles are moulded by pouring a cementitious mix into a mould including side walls, a liftable bottom and a core thereon, partially curing the material, raising the bottom to partially eject the article, further curing the article and finally lifting the core to separate the article from the bottom and complete its removal from the mould. A pallet assembly is disposed in each of shells 21 and comprises a longitudinal beam 35, a side wall 37, a bottom plate 38 and an end plate welded together and serves, with a side wall 23 and an end wall carried by a core 42, to define the mould. The cores 42 rest on bottom plates 38. The shells 21 may be resiliently mounted on frame 10 to permit vibration. Strips 41 may be provided to form a rabetted edge on one side and end of the slabs. After filling the moulds curing is effected by steam generated below the moulds which rises between the shells 21 and enters the cores 42 through openings 46. The pallets are then raised by jacks 28 to the position shown in dotted lines, thus breaking the bond between the articles and the side walls 23. After further curing the cores 42 are lifted, thus breaking the bond between the articles, side walls 37, bottom plates 38 and one end wall of the mould, after which the articles are detached from the cores.
Patent GB-1387879-A (GB)
Title: Gates and operating mechanism therefor
IPC: E05F11/12
Filed: 1972-06-12
Abstract: 1387879 Animal crates DONALD PRESSES Ltd 5 June 1973 [12 June 1972] 27374/72 Heading AIM [Also in Divisions El and E2] A gate 1 on a stock crate 20, is so constructed and operated by mechanism that enables it to be selectively opened and closed about one or the other of its lateral edges. Upright side wall members 3, 4 of the crate carry support members 5, 6 respectively each formed with recesses into which side members 1a and 1b of the gate are received and retained by pivoted hook members 9, 10. The hook members 9 are fast with a shaft 15 secured to a lever 13 whilst hook members 10 are carried by a shaft 16 fast with a lever 14, both levers having pivotal connections with a link member 12 provided with rollers 28 which engage on opposite edges of a lever 2. The lever 2 is pivotally connected at one end 11 to the gate 1 and at the other end it carries a handle 22, by which it may be moved, and a roller 23 which runs around the edges of a profiled guide plate 16'. The operation of the mechanism is such that movement of lever 2, say to the position shown in Fig. 3, releases hook 9 and swings the gate about the recess in support member 6 whilst movement of lever 2 to place roller 23 on the opposite side of plate 16' will cause the gate to swing open about the pivot provided by support member 5. The opposite end of the crate has further doors 40 opened and closed simultaneously by lever and link mechanism 41, 43. An alternative linkwork (Fig. 5, not shown) dispenses with guide plate 16.
Patent GB-1427524-A (GB)
Title: Circuit coupling devices
IPC: H01G4/38
Filed: 1972-06-13
Abstract: 1427524 Capacitors; component assemblies INTERNATIONAL COMPUTERS Ltd 23 May 1973 [13 June 1972] 27453/72 Headings H1M and H1R [Also in Division H2] In a capacitor bridging the common supply lines to a plurality of circuits, e.g. integrated circuits on a board, one electrode of the capacitor is divided into isolated portions, each connected to a respective terminal of a circuit, and a member is provided for conductively connecting the isolated portions, which member is removable to isolate the circuits from the supply line, e.g. for test purposes. As shown rigid dielectric strip 11 has a continuous metal coating 13 on one side and separated coatings 12 on the other, a coating 12 optionally having a gold or tin layer 18 for good electrical contact. A conductive clip 19 fits over the capacitor arrangement, being insulated from electrode 13 by insulation 17 and having broad spring fingers 20 contacting and bridging electrode portions 12. Clip 19 may alternatively be insulating with a metallized contact surface and in this case insulation 17 is unnecessary. Further, to isolate the circuits from both supply lines, electrode 13 may also be divided into portions which can be interconnected by a metallized coating on an insulating clip. Terminal pins 16 for each portion of electrode 12 and at least one pin for electrode 13 are used to mount the assembly on a circuit board. The capacitive assembly may comprise a plurality of separated portions so mounted on the board as to impart maximum rigidity thereto.