baber/WOPTO huggingface dataset:
Patent GB-508146-A (GB)
Title: Improvements in and connected with air-screws
IPC: B64C11/22
Filed: 1938-07-19
Abstract: 508,146. Screw propellers. WESTCOTT, F. W., and TAIT, J. A. July 19. 1938, No. 21359. [Class 114] A screw-propeller blade is provided with central metal stiffening member coaxial with guides in the blade and has at spaced intervals lateral projections which engage slots in the blades through insets of rubber or like resilient material. The blade 1 has a central rod 2 with lateral projections 3 which take into recesses 4 in the blades. Between the recesses the rods are free from the material of the blade since the passages 6 are of greater dimensions, but the rods are supported in the vicinity of the recesses. The inner end 7 of the rod 2 is attached to the blade root and to a collar 8 surrounding it by a pin 9, whilst on the outer end the rod has a screw end which is secured by a spring washer 16 and nuts 14, 15. The tip of the blade is preferably of metal 13 and this in turn may have reinforcing lining 18. Where the blade is of laminated wood, the overlap of the tip therewith serves to hold the laminations together and a rubber insert may be provided between the blade tip and the blade proper. The blade may be covered with shark skin which is attached with its rough side outermost and with the grain extending towards the root, such attachment being effected by glue or cement applied under pressure. The exposed surface of the skin may be given a cellulose finish.
Patent GB-699617-A (GB)
Title: A device for separating impurities from a fluid circulating through a conduit
IPC: F16L55/24
Filed: 1952-08-26
Abstract: 699,617. Filters. BLOKSMA, R. Aug. 26, 1952 [Dec. 8, 1951], No. 21420/52. Class 46 A housing 1, Fig. 1, provided with pipe connections 2, 3, having a filtering element 6 interposed between them and with a discharge tube 7 discharging into a reservoir 10 is characterized in that the discharge tube and reservoir are interconnected by a disc 8 having oppositely-directed screw threads, one co-operating with the tube 7 and the other with the upper rim of the reservoir, the disc also carrying (e.g. by parts 11) a member 12 for closing the discharge tube 7. When the reservoir is to be emptied the reservoir is turned in a direction to screw the disc 8 further on to the discharge tube 7. When movement of the disc 8 is arrested by engagement of the member 12 with the tube 7, Fig. 3, the reservoir 10 is removed from the disc 8 by continued rotation in the same direction. A flange 9, Fig. 3, prevents the disc 8 from being entirely screwed off the discharge tube 7 on reconnecting the reservoir 10.
Patent GB-830486-A (GB)
Title: Improvements in methods and apparatus for data storage
IPC: G11C11/16
Filed: 1956-07-12
Abstract: 830,486. Spin-echo data-storage apparatus. INTERNATIONAL BUSINESS MACHINES CORPORATION. July 12, 1956 [July 15, 1955], No. 21565/56. Class 106 (1). In a spin-echo data storage device, data, once stored, is extracted by suitably varying the polarizing field inhomogeneity, thus obviating the need for a recollection pulse. This extraction method can produce echoes in either " mirror " or " entered " form and also repeated read out. Data is entered, in the usual manner, by applying R.F. pulses to a coil 32, Fig. 1, surrounding the substance, but the external polarizing field being produced by a magnet 31, which by itself would produce a uniform field, and vertically positioned oppositely poled coils 33, 34, is arranged to decrease linearly across the substance, as shown by the full line of Fig. 5. To extract the data, the D.C. current, Fig. 7, in the coils 33, 34 is reversed at the time when the recollection pulse would normally be applied, Fig. 6, which causes the field across the substance to increase linearly from left to right, as shown by the dotted line in Fig. 5, which in turn causes those nuclei precessing at speeds below the average precessional speed to precess at speeds greater than the average by an amount equal to the amount by which their speeds were less than the average speed and similarly for nuclei which were precessing at speeds greater than the average speed before the field was charged. The ultimate result is that the precessing nuclei converge and induce echo signals in the surrounding coil. These echoes correspond to mirror echoes. A further reversal of D.C. current at a later time would cause further echoes which would be mirror echoes of the first set of echoes with respect to the field reversal point. Alternatively, as in Fig. 8, after the first set of echoes the D.C. current could be reduced to zero at a time T 1 , and then, at a time T 2'  restored to its initial value whereupon, as before, since as the substance is subjected only to the homogeneous field of the magnet 31 during the period when the D.C. current is zero the relative positions of the precessing nuclei are unaltered during this period. A further example is described (Fig. 9, not shown) where the D.C. current is only partially reversed. Specification 795,057 is referred to.
Patent GB-763028-A (GB)
Title: Pin tumbler mechanism for cylinder locks and latches
IPC: E05B27/04
Filed: 1954-07-26
Abstract: 763,028. Barrel locks. LEGGE & CO., Ltd., J., LEGGE, J. E., and LEGGE, F. V. July 19, 1955 [July 26, 1954], No. 21700/54. Class 44. In pin tumbler mechanism for cylinder locks and latches, the pins 3 and rollers 4 are of square or other non - circular cross section and the holes 9 in which they slide, are of corresponding or complementary cross - section so that the pins and rollers are prevented from turning therein. As shown, the inner ends of the rollers 4 are radiused to conform to radiused outer ends of the pins 3.
Patent GB-408130-A (GB)
Title: Improvements in or relating to surgical bandages and methods of making the same
IPC: A61L15/58
Filed: 1933-08-02
Abstract: 408,130. Bandages. FIRESTONE TYRE & RUBBER CO., Ltd., Great West Road, Brentford, Middlesex.-(Assignees of Dockson, C. H.) Aug. 2, 1933, No. 21709. Convention date, Feb. 6, 1933. [Class 81 (ii).] Bandages are formed by treating porous sheet rubber 11 with a solvent, such as carbon tetrachloride, benzol, chloroform, volatile petroleum fractions, toluol, carbon bisulphide, trichlorethylene, for a short period, e.g. from ¢-10 seconds, and then evaporating the solvent to leave a tacky surface on the bandage which adheres to itself but not to the skin. The rubber treated is preferably crude pale crepe or similar rubber compounded with other ingredients and sheeted on a crepe mill which imparts to it a porous structure. The compounding ingredients may comprise boric acid or zinc oxide or stearate. Antiseptics such as phenol or cresol may be applied to the tacky surface or to the solvent employed. The bandages are preferably rolled up with a gauze backing 14; they may be applied to cover wounds, as elastic limb binders in the treatment of varicose veins, or for binding fingers &c. by applying a strip of bandage to the finger, pinching the free edges into mutual adherence and trimming with scissors.
Patent GB-1386150-A (GB)
Title: 6-acylaminophenyl-4,5-dihydropyridazones
IPC: C07D413/12
Filed: 1972-05-10
Abstract: 1386150 6 - Acylaminophenyl - 4,5 - dihydropyridazones BADISCHE ANILINSODAFABRIK AG 10 May 1972 [11 May 1971] 21734/72 Heading C2C Novel 6 - acylamino - 4,5 - dihydropyridazone compounds of general Formula (1): in which R is H or C 1-8  alkyl, and X is an amino or ammonium radical containing directly attached to the N atom at least one C atom but not more than one aromatic ring, and acid addition salts thereof, may be prepared by reacting an amine XH or a trialkylamine with a dihydropyridazone of the Formula (2): which in turn may be prepared by reacting compounds of Formula (4) with compounds of Formula (5) to form compounds of Formula (6) which are then cyclized with hydrazine The novel compounds I exhibit pharmaceutical properties, having the effect of lowering blood pressure, dilating the coronary arteries and combating inflammation.
Patent GB-225603-A (GB)
Title: A means of reducing echo effects in telephone lines
IPC: H04B3/20
Filed: 1923-08-29
Abstract: 225,603. Robinson, C., and Chamney, R. M. Aug. 29, 1923. Repeating and amplifying systems.-In a two-way repeater employing normallyoperative amplifiers, echo effects are suppressed by causing the passage of signal. ling currents in one direction to render substantially inoperative the amplifier associated with the other direction, the control being effected entirely by non - contact making devices such as thermionic valves. In a four-wire system means may also be provided to prevent " bleating " when no currents are passing in either direction. In the four-wire system shown, the anode circuit of the first valve 23 of a two-valve amplifier is coupled through a further valve 25 to a rectifying valve 27 so that the passage of voice currents in the direction 10, 11 causes a direct current to flow in the anode circuit of valve 27 and the resultant potential at the end of a resistance 30 included in the grid circuit of the first valve 35 of the opposite amplifier prevents the passage of signals in the direction 13, 12. When no currents are flowing in either direction, " bleating " is prevented by holding open the primary circuit of transformer 14 at the contacts of a relay 19 included in the anode circuit of the rectifier 27. Retard coils 29 and condensers 28 provide necessary time-lag in the rectifier circuit. In a similar arrangement for a two-wire system employing balanced transformers, the transformer coupling 22 is replaced by a condenser coupling, and filter circuits in series with the amplifiers are employed to produce time-lag. Specifications 208,313 and 211,135 are referred to. The Provisional Specification also states that the rectified currents may increase the amplification in the one direction in addition to reducing the amplification in the other direction.
Patent GB-1129639-A (GB)
Title: Novel terpolyamides and process
IPC: C08G69/26
Filed: 1966-05-17
Abstract: 1,129,639. Terpolyamides. MONSANTO CO. 17 May, 1966 [24 May, 1965], No. 21808/66. Heading C3R. Linear fibre-forming terpolyamides are derived from hexamethylene diamine and (A) 1 to 98% (molar) adipic acid, (B) 1 to 98% 5-t.- butyl-isophthalic acid and (C) 1 to 50% terephthalic acid in equimolar proportions of diamine to total acid.
Patent GB-803796-A (GB)
Title: Continuous bleaching of textile fabrics made from vegetable fibres
Inventor: WHITE WILFRED ARTHUR STEPHEN
IPC: D06L4/70
Filed: 1955-07-28
Abstract: Textile fabrics of vegetable fibres are treated, preferably in open width (1) with a bath of trichloroethylene or perchloroethylene, the entrained solvent being removed by passing the fabric through hot water; (2) with an aqueous bath of a hypochlorite at 40 DEG  to 90 DEG  C. and pH at least 9.0, and yielding 0.5 to 5 grams per litre available chlorine, the immersion time being from 15 seconds to 7 minutes; (3) with water (rinsing); and (4) with an aqueous solution of a per-compound at a pH of at least 11 followed by steaming.  Steps (1) and (2) may be performed in the reverse order.  Sodium hypochlorite may be used for step (2). The per-compound may be sodium peroxide, sodium percarbonate or hydrogen peroxide.  The solvent in step (1) may be at 80 DEG  to 87 DEG  C. and may be circulated through a series of baths in opposite direction to the movement of the fabric through the baths. Surplus solvent is removed before entering the solvent recovery bath.  The percompound solution is such as to yield at least 7 grams per litre available oxygen and has an alkalinity corresponding to at least 7.2 grams per litre sodium hydroxide and may contain sodium silicate and an anionic or neutral wetting agent such as an octylated cresol-ethylene oxide condensate. In an example, cotton duck is treated.  Specifications 747,481 and 749,705 are referred to.
Patent GB-441696-A (GB)
Title: Improvements in or relating to toy pistols
IPC: F41B7/00
Filed: 1934-07-26
Abstract: 441,696. Toy pistols. HALL, F. C., Darwin Works, Leopold Street, Birmingham. July 26, 1934, No. 21844. [Class 132 (iii)] A toy air-pistol in which a cork is projected with a repeater action is in the form of a twopart sheet-metal casing a and comprises a spring controlled air compressing piston g carried by a rod g<1> carrying a rod e with a retaining ring e<1> for the cork projectile d and having a slot ,g<2> engaging a lever h having a slotted bearing h<1> upon a pivot a<4> pressed up from one side wall of the pistol casing and controlled by a spring i engaging with a lug h<2>. The rod e is slidable in slotted guids all and b<3> to prevent complete ejection of the cork d from the barrel b which is positioned against a disc c by engagement of lugs b<1> on the barrel and lugs c<1> on the disc with apertures a<2> in the casing. The barrel b is provided with an annular seating b<2>. The lever h is controlled by a trigger j of hollow U-formation having a projection j<1> engageable with the lug h<2> and fitted with a return spring k coiled around its pivot pin l and engaging with a stop a<5>.
Patent GB-863524-A (GB)
Title: Improvements in building-beds for large structures, such as ships or parts thereof
IPC: B63B9/00
Filed: 1959-06-25
Abstract: 863,524. Slipways. GOTAVERKEN A. B. June 25, 1959 [July 15, 1958], No. 21857/59. Class 68(2). A ship-building slipway comprises a base 1 with embedded joists 3 which form flat tracks 4 for the rollers 8 of roller units 5. Each unit comprises a plurality of rollers 8 mounted in a frame 11. A tongue 13 projecting from the track 4 engages a groove 12 in each roller. The ship is supported on blocks 6 secured to channel beams 7 which run on the rollers 8 and have a projecting tongue 16. Each roller unit has a pair of arms pivoted on the spindle of the roller at one end of the units and the arms have notches at their free ends which engage reduced portions 15 on the rollers of an adjacent unit. In use a number of roller units are connected together (Fig. 5) of sufficient length to carry the requisite number of blocks 6 and when the unit has been built it is moved along by means 19 and further roller units and blocks are assembled on the ways. Where a block 6 is used as a distance piece to push the unit 9 it is prevented from tipping by pivoted arms 20 with roller ends 21 which engage the top surface of the edges of the beams 7. Return tracks 17 are provided between the ways to enable roller units to be returned to the loading position.
Patent GB-947263-A (GB)
Title: Rotary electric switching mechanism
IPC: H01H19/63
Filed: 1962-06-06
Abstract: 947,263. Make-and-break switches, mechanical. CINCINNATI MILLING MACHINE CO. June 6, 1962 [Nov. 24, 1961], No. 21871/62. Heading H2B. A rotary switch 15 comprises a circular array of contact studs or bars 20 about an axis A, a continuous flexible contact diaphragm 22 covering said circle of studs, a rotor member 28 mounted for rotation about axis A, and a roller 35 carried by the rotor member and being mounted to roll over diaphragm 22 to deflect it at successive studs 20. Roller 35 deflects diaphragm 22 to engage studs 20 or to break engagement with the studs (Fig. 4, not shown). Diaphragm 22 is held clamped by conducting rings 23, 24, to which a terminal pin 26 is connected. Studs 20 have terminal pins 21 projecting through the base wall 19 of the switch housing 16 which is mounted on a support 17. The rotor member 28 is mounted on a shaft 27 driven from a motor 36. Diaphragm 22 is of beryllium-copper alloy and the contacting side is gold-plated, while the contact studs 20 are of silver.
Patent GB-730759-A (GB)
Title: Improvements in or relating to the production of trimethylolpropane
Filed: 1953-08-07
Abstract: In a process for the production of trimethylolpropane by p condensing butyraldehyde and formaldehyde under alkaline conditions to give a reaction mixture containing trimethylolpropane and formic acid salts, the said reaction mixture is taken up in a solvent in which trimethylolpropane is soluble but in which the said formic acid salts are substantially insoluble, the resulting mixture is dehydrated to effect separation of the formic acid salts which are removed from the mixture whereafter a suitably small quantity of an inorganic acid reacting substance is added which will convert the remaining formates to inorganic salts and formic acid and the resulting mixture is distilled under reduced pressure.  The formates are usually alkali and alkaline earth metal formates.  Solvents mentioned are alcohols, especially butanol or higher alcohols, which permit the removal of water from the mixtures by azeotropic distillation, which is preferably conducted under reduced pressure. Inorganic acid-reacting substances mentioned are mineral acids, inorganic acid salts, boron trifluoride or salts which are easily hydrolysed such as aluminium sulphate.  Water may be introduced into the mixture with the acid substances and the mixture may be heated. In examples: butyraldehyde, formaldehyde and sodium hydroxide solution are reacted together, the reacted mixture is adjusted to a pH value of 7, n-butanol is added and the mixture refluxed until water is removed.  Sodium formate is separated and butanol removed from the mixture under reduced pressure.  Phosphoric acid is then added to the residue and trimethylolpropane is distilled under vacuum (1); water is added at the same time as the phosphoric acid in a process otherwise similar to (1), (2); in processes otherwise similar to (1) sodium hydrogen sulphate and water and concentrated sulphuric acid are added instead of phosphoric acid (3) and (4); (1) is repeated using freshly precipitated calcium hydroxide instead of sodium hydroxide (5); and concentrated sulphuric acid is used instead of phosphoric acid in a process similar to (5), (6).
Patent GB-349831-A (GB)
Title: Improvements in or relating to locks, especially those for the doors of vehicles
IPC: E05C1/16
Filed: 1930-07-19
Abstract: 349,831. Latches. BIENAIME, R., 10 bis, Boulevard Bonne-Nouvelle, Paris. July 19, 1930, No. 21924. Convention date, Aug. 2, 1929. [Class 44.] The contact surfaces b<1> of a striking plate socket and latch bolt head are inclined and the bolt head is urged by a spring e to clamp the top of the striking plate against a surface i<1> of the latch casing and prevent vertical play of the door. In the construction shown in Fig. 1 side play is prevented by a longitudinally wedge-shaped bolt head. The end of the head is parallel or wedgeshaped in an opposite direction to form a safety catch. Alternatively side play is prevented by inclining the bolt. As shown in Fig. 5, the contacting surfaces il of the striking plate and latch casing may be inclined.
Patent GB-460301-A (GB)
Title: A new or improved mould for casting printing plates
IPC: B41D3/00
Filed: 1935-08-02
Abstract: 460,301. Stereotype. HOE & CO., Ltd., R. (Hoe & Co., Inc., R.) Aug. 2, 1935, No. 21975. [Class 100 (ii)] In order to prevent the back and edges of a stereotype plate from cooling too rapidly while the centre and type face remain hot, the core is provided at the edges of the mould cavity with heat-insulating material; in addition, the back of the mould may be covered with a sheet of heat-insulating material such as paper, and heating-elements may be inserted in apertures extending round the edges of the cavity. As shown, the mould comprises a vertical fixed core 10 having a chamber 19 for the circulation of cooling-water, a back 11 movable to and from casting-position, a bottom bar 38 and side bars 39 which act to hold the matrix C in place. Recesses 21 are formed in the lower and side marginal portions of the core 10 for the reception of heat-insulating material 22. A sheet 23 of paper or other material is strained over the face of the core by spindles 24, 25, the spindles being adapted to be locked against rotation. The edges of the sheet material are held in place by clamping- bands 29 secured to bars 34 which are adjustable on the core by screws 36. An electric heating- element 65 may also be secured in recesses in the core behind the material 22. If desired, the back may also be provided with heat-insulating material around the edges of the mould cavity.
Patent GB-238393-A (GB)
Title: Improvements in and relating to covers for the saddles of motor cycles and the like
IPC: B62J1/26
Filed: 1924-09-19
Abstract: 238,393. Johnston, M. Sept. 19, 1924. Saddles. - In a pneumatic saddle cover of the type in which an air container consisting of an inflatable elastic tube is enclosed in a cover, the elastic tube has closed ends 1 and is folded to form two flattened coils 2 connected together by a transverse part 3, the adjacent folds being secured to one another by cement &c. In a modified form, the outer folds of each coil are longer than the inner folds, and are brought together at the front to form a peak.
Patent GB-374681-A (GB)
Title: Pressing or ironing machine
IPC: D06F69/04
Filed: 1931-08-06
Abstract: 374,681. Ironing-presses. NAAMLOOSE VENNOOTSCHAP: VENNOOTSCHAP TOT EXPLOITATIE VAN STRIJKEN PERSMACHINE OCTROOIEN, (V.E.S.P.O.), 89, Stationsweg, The Hague.-(Assignees of Naamlooze Vennootschap Machinefabriek Reineveld ; Delft, Holland.) August 6, 1931, No. 22284. Convention date, May 4. [Class 138 (ii).] In an ironing press the iron 7, Fig. 1, is pivoted to a lever 5 which itself is pivoted on a shaft 6 in a carriage 4 which can be caused to travel along hor.zontal rails 3 in the frame 1. Arms 10 are ad, ustably secured to the lever, and springs 9 are adjustably secured to the arms by bolts and nuts 12, 13, the other ends of the springs being anchored to a rearwardly extending frame 11 of the carriage 4. An arm 22, Fig. 4, is pivoted near the rear end of the lever and when the latter is rotated in the counterclockwise or press-closing direction to a predetermined extent a projection 24 on the arm engages an adjustable stop 25 carried by the extension frame 11 of the carriage, thereby forcing the arm inwardly so that a roller 23 mounted thereon lies above a rail 20, Fig. 1. The rail is carried by one arm of a lever 18 and is connected by a link 21 to the machine frame and the other end of the lever 18, which is pivoted to the machine frame at 19, is linked to a normally elevated treadle 14. When the treadle is depressed the arm 22 becomes coupled to the rail 20 and the lever 5 is rotated further in a, counterclockwise direction to force the iron into pressing engagement with the articles on the table 2. In the form shown in Fig. 5 the guides for the carriage in which the lever 5 is pivoted are supported by a second carriage 26 which travels on rails 27 arranged at rightangles to the guides so that the iron can be adjusted both transversely and longitudinally. The lever 18a supporting the rail 20 is pivoted to the carriage 26 and is provided with a roller 31 which contacts with the lower face of a vertically movable inverted T-beam 30 each end of which is linked to the treadle. The lever is provided with a cranked forward extension 32. When the lever 5 is in the inoperative inclined position and the treadle is depressed the lower end of the cranked extension 32 contacts with a lever to open a steaming valve.