baber/WOPTO huggingface dataset:
Patent GB-805854-A (GB)
Title: Process for the production of several positives from one photographic negative by the silver salt diffusion process
IPC: G03C8/06
Filed: 1955-08-30
Abstract: 805,854. Photographic silver salt diffusion process. AGFA A. G. Aug. 30, 1955 [Aug. 30, 1954; July 2, 1955], No. 24858/55. Class 98(2) Several positives are made from one negative by exposing a silver halide emulsion layer, developing in presence of silver halide solvent, contacting it with a lightinsensitive transfer layer using only sufficient silver halide solvent to produce a legible image therein, separating the negative layer and contacting it with a further trasfer layer in the presence of developing solution and additional silver halide solvent, if desired repeating this cycle. Normally the silver halide solvent is present in the transfer layer and hypo, hexamethylene tetramine and particularly barium thiosulphate are quoted as such, but the solvent action of sodium sulphite is referred to also. Ten examples mostly using developing substances in both the silver halide emulsion layer and the developing solution detail the process, thus in Example 1 a silver chloride layer containing benzotriazole, mercapto benzthiazole, hydroquinone, potassium metabisulphite and formalin is exposed and wetted along with a transfer layer coated with barium thiosulphate, hypo, colloidal silver sulphide and formalin in gelatine solution, both layers having paper supports, in developing solution containing caustic soda, sodium sulphite, hydroquinone, metol and potassium bromide, the layers are pressed together by rollers, separated, and the negative layer is applied similarly to a second and then a third of the transfer layers. Guanidine salts and various other adjuncts as used in the diffusion process are mentioned in other examples.
Patent GB-249039-A (GB)
Abstract: 249,039. Wade, H., (Karpen & Bros., S.). Oct. 23, 1925. Methylals; formaldehyde; formates.-Methylals are produced by the interaction of methylene chloride, an alkali, and an alcohol, the reacting substances being heated together at a temperature exceeding 60‹ C. in a closed vessel or under pressure, the alcohol concentration preferably being high. The methylal produced may be hydrolysed to formaldehyde. By using different alcohols, different methylals may be formed, and sodium, potassium or lithium hydroxide may be used as the alkali. The process may be carried out in the plant shown in the Fig. For example, methylene chloride from a tank A, methyl alcohol from a tank B, and caustic soda from a tank C, are charged into an autoclave D, preferably provided with a stirrer, and are heated therein at a temperature of 100-125‹ C. under a pressure of approximately 100lbs. per sq. in., for from one to three hours. The products are passed to a filter E, when sodium chloride is extracted and passed to a tank F, and thence to a still G, when the methylal and methyl alcohol are fractionated, the former passing to a tank I, and the latter being returned to the tank B. The residual liquor is passed to an evaporator J, and after removal of the water, the caustic soda is returned to the tank C. By passing the methylal to a hydrolyzer L, formaldehyde and methyl achohol may be produced from it and be passed to a still M, from which the formaldehyde is passed to a tank N and the methyl alcohol returned to the tank B. If sulphuric acid is used in the hydrolyzer any remaining with the formaldehyde may be removed by barium carbonate. The caustic soda may be introduced into the autoclave in the solid state, or it may first be dissolved in methyl alcohol from the tank B. If only a slight excess of caustic soda is used, the evaporator J, from which it is recovered, may be omitted. If any formaldehyde is formed in the autoclave by the interaction of caustic soda and methylene chloride, it is converted by the caustic soda to formate and may be recovered in any suitable way.
Patent GB-1380285-A (GB)
Title: Device for filling storage reservoirs at a high flow rate
IPC: B65D88/54
Filed: 1972-05-26
Abstract: 1380285 Water supply channels DELAT TRE-BEZONS 26 May 1972 [9 June 1971] 25014/72 Heading E1X A device for facilitating the filling of storage reservoirs at a high flow rate comprises an upwardly open circular channel connected to a liquid supply pipe 3, 4 and defined by two elements having a common vertical axis, one of these elements being- a dish 5 to which the pipe is tangentially connected and the other element being a diffuser core in the form of an upwardly widening mushroom 6, 8, 9 and such a device is characterised in that the bottom 7 of the channel rises helically in the direction of the flow of the liquid.
Patent GB-746464-A (GB)
Title: Improvements in or relating to centrifugal separators
IPC: B04B9/08
Filed: 1954-08-30
Abstract: 746,464. Centrifugal separators. AKTIEBOLAGET SEPARATOR. Aug. 30, 1954 [Oct. 1, 1953], No. 25113/54. Class 23. [Also in Group XXIV] In a centrifugal separator driven by worm and wheel gearing 2, 8, the worm 2 is supported in the machine frame by bearings 3, 4, and is flexibly connected to the shaft 1 of the separator. The upper end of the shaft is supported by a resilient bearing (not shown) and the lower end of the shaft is mounted in a bearing 6, the arrangement permitting limited oscillation of the shaft about the centre of the bearing 6. The flexible connection between the worm and the shaft comprises projections on a sleeve 7 fixed to the shaft and co-operating projections on the worm. The shaft has a bore 13 and carries an impeller 11 so that material from an inlet 12 may be fed to the interior of the separator bowl which is mounted on the upper end of the shaft.
Patent GB-879823-A (GB)
Title: Improvements in and relating to ultra-high vacuum pumping plants
IPC: F04F9/00
Filed: 1960-07-19
Abstract: 879,823. High vacuum pumps. BALZERS AKTIENGESELLSCHAFT FUR HOCHVAKUUM-TECHNIK UND DUNNE SCHICHTEN. July 19, 1960 [Aug. 14, 1959], No. 25114/60. Classes 8(1) and 71. An ultra high vacuum of below 10-<SP>6</SP> mm. Hg. gauge is obtained in a chamber 1 by first connecting it through a valve 5 and a vapour trap 6 to a high vacuum pump 7 of known type e.g. oil diffusion, molecular or getter which provides a starting vacuum of 10-<SP>5</SP> mm. Hg. gauge, and then by closing valve 5 and opening a valve 2 whereby the chamber 1 is connected through a trap 3 to a high vacuum pump 4 similar to pump 7 and which produces the ultra high vacuum. During the first evacuation stage chamber 1, valves, 2, 3 and trap 3 are heated to about 450‹C. and are re-cooled during the second stage.
Patent GB-486910-A (GB)
Title: Excess pressure valve for compartments to be protected against admission of poisonous gases
IPC: G05D16/18
Filed: 1937-09-16
Abstract: 486,910. Gas - - protection chambers: DRAGER, 0. H. Sept. 16, 1937, No. 25143. Convention date, Oct. 17, 1936. [Class 20 (i)] [Also in Group XXIX] Rooms or oompart ments to be protected against the entry of poisonous gases are fitted with a valve device comprising a balance beam or rocker-arm p carrying a valve flap n at one end and a movable counterweight q near its other end. The centres of gravity of the valve flap and the counterweight are so disposed in relation to the pivot h of the balance beam that the valve-closing moment decreases as the valve opens under the pressure of air within the compartment. The counterweight q is adjustable in a slotted part r of the balance beam and is secured in position by a wing nut v. The valve seat b is arranged in a vertical wall a of the compartment and carries an outlet conduit c with a perforated cover d. The valve may be held closed by an eccentric k.
Patent GB-245866-A (GB)
Title: Improvements in the manufacture of cement and kilns for use therein
IPC: C04B2/10
Filed: 1924-10-22
Abstract: 245,866. Burley, S. W. Oct. 22, 1924. Drying-kilns of the non-rotary type in which the gases from the burning charge in the firing-chamber 1 pass over a drying bed 4 for the slurry which is in preparation for the next charge, are provided with means for forcing air into the ash-pit 3 and inducing a draught over the slurry bed by means of an extraction fan. The air may be concentrated upon one or more spots of the charge to start the fire and inferior fuel may be used with the charge. The air-inlet 14 of the ash-pit 3 is closed during burning by a loosely-built brick wall, and a fan 15 delivers air through a pipe 17 to a number of nozzles 18 beneath the fire-bars 2, the nozzles being detached during the removal of the burnt charge. The hot gases pass over the drying floor 4, through openings 7, circuitous flues 5, 6 and passages 8 to a chamber 9 below the stack 10. A damper 11 separates the chamber 9 from the stack and a fan 12 driven by a motor 13 extracts the gases and discharges then to the stack which may be shorter than usual or may be dispensed with. The drying may be prolonged after firing has ceased, hy means of the extraction fan, and additional controlled air inlets may be provided above the drying floor 4 for ventilating purposes while men are removing the dry slurry to the firing chambers. The fans 12, 15 may be provided with means for regulating their output.
Patent GB-321754-A (GB)
Title: Improved shock absorber
IPC: F16F7/04
Filed: 1928-09-01
Abstract: 321,754. Howlett, J. W. Sept. 1, 1928. Vibration-dampers.-In a friction shockabsorber for retarding the relative movement between two parts, e.g. the chassis and axle, of a vehicle and of the kind in which the frictional effort increases with the displacement occurring, the friction elements associated with the two parts consist of discs or coaxial cylinders and are provided with contacting surfaces wholly or partly of undulating form. In the construction shown the friction elements comprising discs 8, 9 having contacting surfaces of multiple wedge shape are mounted on interleaved arms 6, 7 which pivot on a common spindle 13 and are connected at their opposite ends to the chassis and axle respectively, the discs moving apart and increasing the pressure on a spring disc 12 as the arms 6, 7 approach each other. Friction washers 10, 11 are disposed between the leaves 6a, 6<b>, 7a, 7b of the arms 6, 7. In a modification the arm 6, 7 carry coaxial cylindrical members having contact surfaces of irregular or undulating form.
Patent GB-1074656-A (GB)
Title: Photographic lens hood
Inventor: STEISSLINGER KURT
IPC: G03B11/04
Filed: 1964-06-18
Abstract: 1,074,656. Lens hoods. EASTMAN KODAK CO. June 18, 1964 [July 19, 1963], No.25213/64. Heading G2A. A lens hood has a pair of flanges which can engage in an annular peripheral groove on a camera lens mount, and is made of resilient material such that it can be momentarily distorted by flexing to engage the flanges in the said groove. The hood shown is made of a relatively flexible plastics material. It has two inwardly projecting flanges 20, and two knurled regions 22, displaced at 90‹ from the flanges, for gripping purposes. The hood is intended for use with a camera having an annular groove round the periphery of the lens mount. By pressing on the two knurled regions, the hood is deformed sufficiently to allow it to be slipped on to the lens mount and the flanges to engage in the said groove. Serrations or knurling 26 is provided on the hood, to mate with corresponding serrations or knurling on the outer surface of the lens mount, so that the lens can be rotated for focusing purposes by means of the hood.
Patent GB-957739-A (GB)
Title: A new or improved pivoting window
IPC: E06B3/50
Filed: 1961-07-12
Abstract: 957,739. Reversible windows. R. WERNER. July 12, 1961 [July 12, 1960], No. 25240/61. Heading E1J. A reversible window with horizontal pivots 3 which slide and rotate in grooves 4 formed in the upper part of a frame 1 is supported by levers 5 pivotally connected to the windows and frame which are accommodated, when the window is closed, in recesses 11, 12 formed in the window and frame respectively. Pins 15 on the levers co-operate with inclined plates 16 on the window and frame to move the lower ends of the levers out of the frame recesses 12 so that the levers clear the un-recessed part 14 of the frame when the window is opened outwards and moves the upper end of the levers out of the window recesses 11 so that they clear the un-recessed part 13 of the window when the window is opened inwardly. The movement of the lever ends in the axial direction of their pivots acts against the action of associated pivot springs. The gap between the window and frame is sealed externally by a deformable rubber-seal attached to the window and internally by a blind frame 19 hinged 21 to the window frame.
Patent GB-278004-A (GB)
Title: Improvements in or relating to foam fire-extinguishing apparatus
IPC: A62C31/05
Filed: 1927-09-24
Abstract: 278,004. Excelsior Feuerloschgerate Akt.-Ges., and Burmeister, H. Sept. 25; 1926, [Convention date]. Nozzles with regulable orifices; perforated pipes. - A device for distributing foam at its point of application comprises a pipe a which preferably tapers towards its final outlet b<11> and is provided with a number of branches b, b<1>. The entry from the pipe a to each branch is controlled by a pivoted tongue or valve c, the adjustment of which by a screw d assures an equal delivery of foam from each branch, whatever the viscosity of the foam may be.
Patent GB-640887-A (GB)
Title: Improvements in and relating to collapsible revolving doors
IPC: E06B3/90
Filed: 1948-09-29
Abstract: 640,887. Revolving doors. POLLARD & CO., Ltd., E., and POLLARD, H. E. Sept. 29, 1948, No. 25394. [Class 20(iii)] A collapsable revolving door has a central support 7 with a wing supporting horizontal plate 19, 20 formed with recesses on its upper and lower faces, and mounting means on each wing including two pivots 25, 26 extending vertically in opposite directions to engage the recesses on the upper and lower faces respectively, the walls of the recesses having arcuate portions 27, 28. 29 and 30, 31 which guide the pivots to permit pivotal movement of the wings relative to the plate to allow the wings to move from the normal radial position to the folded or collapsed position or vice versa. The support 7 extends through the frame 8 and is rotatably mounted on a bearing 9 on the carriage 10 which has wheels 11 running on the track 12. A rod 13 is slidable in and extends beyond each end of the support 7, with the lower end 16 supported in a cup 17 rotatable in the bearing 18. Each wing has a slot extending from its inner edge at the height of the plates 19, 20 and containing a mounting member with walls 21, 22 vertically spaced slightly more than the thickness of plates 19, 20. Rollers 23, 24 rotatable on vertical axles 25, 26 in walls 21, 22 engage in the recesses in the plates 19, 20 and connect the wings to the support. Plate 20 is inverted relative to plate 19. In the normal radial position of the wings roller 24 is located in the circular portion 32 of its recess, while roller 23 engages the centre of wall 27. The wings are retained in this position by balls 34, 35 on the mounting members engaging recesses 34a, 35a in the plates 19, 20. The balls are urged into the recesses by member 38 which is rotated by a ball 37 pressed by a spring 36. This spring abuts a non-rotatable plunger 40 in the casing 39, and its tension is adjusted by the bolt 41, 42 threaded in the plunger. The bolt head 41 is held to the casing by a pivoted cam 43 which may be rotated by a lever 44 to release the wings. Balls 34, 35 are automatically released when the wings are subjected to excessive pressure. Supplementary recesses 34b &c. lock the wings in semi-collapsed and collapsed position. The rod 13 is locked in its normal (Fig. 1) position by a plunger 45 on support 7 which is pressed by spring 46 into the aperture 46a in the rod. When this plunger is removed by means of button 47 the spring 48 urges the rod 13 upwardly clear of the cup 17 and releases the lever 49 and latch 50 so that the door may be moved on the carriage 10 along the guide 12. On return the lever 49 is turned to return the rod 13 to its normal position. Each wing has a flexible strap 51 to seal the gap between the plates 19, 20 and the walls of the mounting member.
Patent GB-334056-A (GB)
IPC: B22D35/04
Filed: 1929-08-21
Abstract: 334,056. Soc. Anon. d'Etudes et de Constructions d'Appareils MÚcaniques pour la Verrerie. Oct. 12, 1928, [Convention date]. Delivering molten metal, - Relates to automatic glassworking machines of the kind in which moulds or receivers rotate about a vertical column and receive charges of molten glass from a, feeder. According to the invention, the mould table or support rotates continuously, but it is also reciprocated horizontally at such a speed that each mould remains stationary for a short time beneath the feeder while it is receiving a charge of glass. The machine comprises a base 1, Figs. 1 and 2, carrying a vertical shaft 9<1> on which a disc 7<1> rotates. The edge of the disc is formed as a worm wheel 7 and it engages a worm 5 on a shaft 3 driven by a motor 2. A carriage 10 rests on rollers 11 carried by the base 1, and it is so guided that it can only move in a rectilinear path on the rollers. Rollers 12 on the underside of the carriage 10 engage a cam 9 formed on the upper surface of the disc 7<1>, so that rotation of the disc causes reciprocation of the carriage. A gear wheel 8, secured to a shaft 13 journaled on the carriage 10, engages a long pinion 6 secured to the shaft 3, so that the wheels 6, 8 remain in engagement during the reciprocation of the carriage. The moulds 17 are carried by a support 14 which rotates on a vertical standard 20 mounted on the carriage 10, and a worm wheel 16 formed on the support 14 engages a worm 15 secured to the shaft 13. In operation, the mould support 14 is rotated continuously by the shaft 13, and it is also reciprocated horizontally by the engagement of the cam 9 and the rollers 12. The ratio of the gearing is such that each mould as it arrives beneath the feeder has imparted to it equal and opposite movements, so that it remains stationary for a short time while receiving a charge of glass.
Patent GB-243873-A (GB)
Title: Improvement in electric condensers
IPC: H01G5/06
Filed: 1924-10-27
Abstract: 243,873. Dubilier Condenser Co. (1921), Ltd., (Nyman, A.). Oct. 27, 1924. Condensers. - 'The movable elements of a variable condenser are so arranged that the capacity is varied for changes in frequency by degrees of movement substantially proportional to the changes in frequency, i.e. the change in capacity is inversely proportional to the square of the movement of the movable member. In one construction, Fig. 1, the movable plate 2 is mounted on links 6 and adjusted in position, relatively to the fixed member 1, by a screw 8 bearing against one of the links. In another construction, Fig. 4, the fixed plates 12 are rectangular, and the slidably-mounted movable plates 20 are of triangular formation with the converging sides in the form of parts of rectangular hyperbolas.
Patent GB-1356612-A (GB)
Title: Machines for perfoming an operation on parted ends of split metallic rings
IPC: B21D31/00
Filed: 1971-05-11
Abstract: 1356612 Making split metallic rings; angular bending SEALED POWER CORP 11 May 1971 [21 May 1970] 25593/73 Divided out of 1356611 Headings B3A and B3E A machine for performing an operation on the ends of a split, metallic ring comprises guide means including a guide tube extending through a work station of the machine, a nose cone disposed upstream of the work station and faired into one end of the guide tube, means for transferring the split ring axially onto the nose cone and pushing it to the work station, shelf means movable transversely of the guide tube at the work station between a first position adjacent the guide tube exterior and a second position clear of the tube, the shelf means in its first position supporting the ring with its axis parallel to that of the guide tube, and finger means which engage the ends of the ring to contract it, thereby positioning the ends at the work station. The machine is described in detail in Specification 1,356,611.
Patent GB-730982-A (GB)
Title: Process for producing dextran products suitable for pharmaceutical and therapeutic preparations
Inventor: LEVI IRVING
IPC: C08B37/02
Filed: 1952-10-13
Abstract: Depolymerized, apyrogenic dextran is prepared by subjecting an aqueous solution of dextran of high molecular weight to the degrading action of hydrogen peroxide the concentration of which may range from 0.001 to 0.1 M.  The concentration of high-molecular-weight dextran may range from 1 per cent to the saturation value.  Degradation may be carried out at temperatures between 25 and 150 DEG C. and at pressures ranging from atmospheric to 30 lb. sq. in. for periods of several minutes to several days. The solution may be buffered, e.g. to a pH between 6.7 and 6.9, before the hydrogen peroxide is added. A precipitant such as acetone or ethanol may be added to the degraded solution to precipitate any macromolecules present, and further additions of the precipitant may be made to precipitate successive fractions of depolymerized dextran having, at 6 per cent concentration in water, relative viscosities between 1.5 and 82.0, as determined with an Ostwald viscometer at 25 DEG C.  The fractions may be dried.ALSO:In making a therapeutic fluid for intravenous infusion or injection, degraded, apyrogenic dextran (see Group V) having a relative viscosity between 2.0 and 6.0, as determined with an Ostwald viscometer at 25 DEG C., is dissolved in apyrogenic water.  A physiological salt, e.g. sodium chloride, may be dissolved in the fluid.
Patent GB-379110-A (GB)
Title: Improvements in or relating to refractory structures for furnaces
IPC: F27D1/00
Filed: 1931-09-12
Abstract: 379,110. Furnace roofs and walls. LONGENECKER, L. S., 317, Stratmore Avenue, Crafton Heights, Pittsburg, U.S.A. Sept. 12, 1931, No. 25634. Convention date, Oct. 7, 1930. [Class 51 (i).] In a furnace structure c o m - prising a s u s - pended roof and an apron wall composed of refractory tiles, the tiles forming the adjacent ends of the roof and apron wall have shoulder portions arranged at an angle to each other to provide a keyway to receive sector-shape tiles having key projections. A s shown in the Figure, the roof tiles 6 are suspended by hangers from a beam 4 in the manner described in Specification 364,955, the tiles 6 of the roof and apron wall being of the kind described in Specification 278,070, [Class 51 (ii), Furnaces and kilns for applying &c.], except for the terminal blocks 22 which are provided with ledges 23 to receive corresponding portions of the sector-shape tiles 3. The tiles 6 of the apron wall are supported by hangers 30 having T-shape portions which engage with a slot in a bracket 29 secured to the beam 4. The lower end of the bracket has a projection 28 to engage with a hook 26 of the hanger 24 supporting the terminal block 22 of the roof. The beam 4 may be cooled by a conduit 52 through which water or other fluid circulates.