baber/WOPTO huggingface dataset:
Patent GB-706741-A (GB)
Title: Improvements in or relating to focusing view finder systems
IPC: G02B23/14
Filed: 1952-02-14
Abstract: 706,741. Focusing view finders; optical projection screens. KODAK, Ltd. Feb. 14, 1952 [Feb. 14, 1951], No. 3990/52. Classes 97(1) and 98(1) [Also in Group V] A focusing viewfinder system comprises an objective of focal length f and diameter d, a positive Fresnel lens of focal length approximately f opfically aligned with the objective and adjacent the focal plane thereof, a transparent sheet of refractive index N at said focal plane having substantially right circular conical elements perpendicular to said sheet and each of apical half angle tan-<SP>1</SP>Zf(N-1)/d, and means for adjusting the distance between the objective and said elements. Preferably the transparent sheet has more than 10,000 conical elements per sq. inch and the Fresnel lens elements are less than 1/50 inch wide. As shown, a lens 11 in a mount 12 screw-threaded for focusing forms either directly as shown or after a single reflection a real image of a scene on a screen surface having a large number of right circular conical projections 18 and the brightness of the margins of the observed image is rendered sub'stantially equal to that of the centre of the image by means of a Fresnel lens surface 19. The conical element screen and the Fresnel lens may be formed on opposite face of a single transparent sheet 13 as shown, or each may be formed on a separate sheet and the profiled faces of the sheets arranged to face each other. The conical element screen may be formed of transparent plastic material by moulding from a metal die produced by hammering a metal block with a conical punch. Alternatively the screen may be formed with conical recesses when the die formed as above is used to form a second die with conical projections from which the screen is moulded. Providing the projections or recesses approximate to right circular cones, they may be of any right pyramidal shape. The conical elements are preferably disposed in one direction of the plate on a wavy locus having a wavelength of three to fifteen times the width of the element, the distribution in the other direction being preferably random although it may be along straight or wavy lines.
Patent GB-1096624-A (GB)
Title: Diffusers for fluid flows
Inventor: BARNWELL STEPHEN DOWNING
IPC: F04D29/54
Filed: 1964-01-30
Abstract: 1,096,624. Boundary layer control. BRISTOL SIDDELEY ENGINES Ltd. Jan. 28, 1965 [Jan. 30, 1964], No. 4019/64. Heading F2R. [Also in Division F1] A diffuser for liquid or gaseous flow has a first passage part 10 diverging at an angle of 7 degrees, just below the maximum divergence for stable flow, discharging into a second passage part 11 of enlarged cross-section over a step 12. The profile of the edge of the step includes portions 12a oblique to the general direction 13 of fluid flow through the diffuser and converging downstream and portions 12b perpendicular to the flow. Such a profile reduces the rate of increase of cross-sectional area at the transition between passage parts 10 and 11, and the flow over the oblique portions 12a generates vortices 14 the axes of which extend in a downstream direction. These vortices re-energize the flow adjacent the passage walls by mixing the boundary layer flow back into the main stream and making the flow more uniform. In a modification, Fig. 3 (not shown), the second part of the diffuser passage is divergent at a rate greater than the maximum rate for stable flow and the oblique portions of the edge of the step are formed by plates (15) which are continuations of the walls of the passage part 10. In further modifications, the step edge consists entirely of oblique portions 12a, or the portions 12a may be asymmetrical so that vortices 14 of one hand predominate. The application of the diffuser to a gas-turbine engine combustion system is described (see Division F1).
Patent GB-1299262-A (GB)
Title: Improvements in rubber reinforcing compositions
IPC: C08K3/04
Filed: 1970-01-28
Abstract: 1299262 Carbon black composition CABOT CORP 28 Jan 1970 [4 Feb 1969] 4025/70 Heading C1A [Also in Division C3] A rubber reinforcing composition is produced by subjecting to fluid energy milling a blend of (a) between 10 and 50 weight per cent of a precipitated silica having a B.E.T.-N 2  surface area between 50 and 250 m.<SP>2</SP>/gm. and an apparent density of more than 101bs./foot<SP>3</SP> with (b) between 90 and 50% by weight of a carbon black having a B.E.T.-N 2  surface area between 30 and 150 m.<SP>2</SP>/gm., a dibutylphthalate oil absorption factor of greater than 500 c.c./100 gm. of the fluffy black, and an apparent density greater than 10 lbs./foot<SP>3</SP>, the intensity of said milling being at least sufficient to reduce the apparent density of the product to less than 9 lbs./foot<SP>3</SP>. Either or both of the components may be in a pelleted form initially, and may be fed separately to the milling zone so that mixing and co-milling are accomplished in a single step. Preferred ranges of the various parameters are given, and the milled product may be finally pelletized.
Patent GB-1344041-A (GB)
Title: Outrigger for the mooring of boats
IPC: E02B3/24
Filed: 1972-01-28
Abstract: 1344041 Mooring K O TELLBERG 28 Jan 1972 [29 Jan 1971] 4040/72 Heading B7S [Also in Division E2] Cross-stays 4 and 5 are secured to two tubes 1 and 2 of a mooring outrigger by plates 18 and 19 to which the stays are attached and which are bolted to a further plate 17 which connects the tubes 1 and 2. The ends of the plates 18 and 19 are bent to embrace the tubes 1 and 2 and carry pins 13 and 14 which enter openings in the tube walls. Shoulders 9 and 10 on the tubes abut the plates 18 and 19 to further strengthen the arrangement.
Patent GB-941312-A (GB)
Title: Method and apparatus for the manufacture of hollow bodies from thermoplastic material
IPC: B29C49/00
Filed: 1960-02-04
Abstract: 941,312. Blow-moulding hollow articles. R. HAGEN, and N. HAGEN. Feb. 4, 1960 [Nov. 7, 1959], No. 4072/60. Heading B5A. A process of making hollow articles, e.g. bottles, ampoules or toy boats from thermoplastic material comprises extruding at least two separate strips of the material downwardly into an open mould of at least two parts, closing the mould to squeeze together the strips and introducing a pressure medium into the moulds to force the sheets into the mould cavity. The strips may be of different materials, thicknesses or colours and a laminated article may be formed. Fig. 1 shows the extrusion of two strips 12, 13 into a mould 14, 15 over a blowing nozzle 16. The strips may be of different thicknesses (Fig. 2, not shown), or shaper (Fig. 4, not shown). Figs. 5 and 6 show the extrusion of three strips 36, 37, 38 into a mould 39, 40 over separable blowing nozzles 41, 42 to form a divided article.
Patent GB-158879-A (GB)
Title: Improvements in brake mechanisms for motor cars
IPC: B60T11/04
Filed: 1921-02-03
Abstract: 158,879. Soc. des Aeroplanes H. et M. Farman. Feb. 7, 1920, [Convention date]. Brakes, arrangement of; control. ling-apparatus, arrangement of hand, foot, and transmission gear in conjunction with.-Two separate braking systems are applied to the road wheels, one to the rear wheels only, the other to all four wheels, the brakes on the rear wheels acting on separate 'brake drums. The rear wheels are braked by brakes 9 operated by connections 8 through a crank disc 7 from a hand-lever 6. The other system comprises brakes 1 on all four wheels, applied by a pedal 2 through a crank disc 3 between the operating links 11, the rear brakes being applied through an additional crank disc 5. The crank discs may' be replaced by equalizing devices.
Patent GB-1038350-A (GB)
Title: Process for removing acidic gases from gas mixtures
IPC: B01D53/14
Filed: 1965-01-29
Abstract: A process for removing acidic gases, e.g. CO2, COS, from a gas mixture, e.g. natural gas, synthesis, refinery and flue gases, comprises contacting the mixture with a liquid absorbent which includes both a physical and a chemical solvent, recovering the solvents, separating them, and regenerating them separately. The solvents may be separated by gravity inside or outside the absorber. Preferred chemical solvents are the alkanolamines, and preferred physical solvents are the cyclotetramethylene sulphones, having the formula described in Specification 957,260.  The absorbent preferably comprises (percentages by weight): 20 to 60% chemical solvent, 20 to 80% physical solvent, 5 to 20% water, and absorption may be carried out at 1 to 71 kg. per cm.2 pressure and preferably at a temperature in the range 32 DEG  to 55 DEG  C. The chemical solvent is regenerated by stream stripping, if desired after traversing a heated flasher, and the physical solvent by flashing, heating being optional.  The regenerated solvents are recombined and returned, after coolling, to the absorber.  A specific example is described, employing monoethanolamine and sulpholane, in which the stripper is operated at 1.35 kg. per cm.2 and 118 DEG  C. bottom temperature.ALSO:A process for removing acidic gases, e.g. CO2, COS, from a gas mixture, e.g. natural gas, synthesis, refinery and flue gases, comprises contacting the mixture with a liquid absorbent which includes both a physical and a chemical solvent, recovering the solvents, separating them, and regenerating them separately. The solvents may be separated by gravity inside or outside the absorber. Preferred chemical solvents are the alkanolamines, and preferred physical solvents are the cyclotetramethylene sulphones, having the formula described in Specification 957,260.  The absorbent preferably comprises (percentages by weight):-20 to 60% chemical solvent, 20 to 80% physical solvent, 5 to 20% water, and absorption may be carried out at 1 to 71 Kg. per cm.2 pressure and preferably at a temperature in the range 32 DEG  to 55 DEG  C.  The chemical solvent is regenerated by stream stripping, if desired after traversing a heated flasher, and the physical solvent by flashing, heating being optional. The regenerated solvents are recombined and returned, after cooling, to the absorber.  A specific example is described, employing monoethanolamine and sulpholane, in which the stripper is operated at 1.35 Kg. per cm.2 and 118 DEG  C. bottom temperature.
Patent GB-1086351-A (GB)
Title: Manufacture of ethers
Inventor: BEESLEY STANLEY
IPC: C07C43/16
Filed: 1964-01-31
Abstract: A process for the production of a vinyl ether comprises reacting ethylene with a solution of a palladium (II) salt and a metal salt capable of oxidizing palladium metal, in a hydroxy-substituted aliphatic or aromatic hydrocarbon, thereby forming the vinyl ether of the hydroxy compound and reducing the metal salt, and reacting the solution with molecular oxygen to regenerate the metal salt.  The oxidation may be effected simultaneously with the reaction with ethylene or in a separate step.  In one embodiment, a non-explosive mixture containing excess ethylene is used in one zone and a non-explosive mixture containing excess oxygen in the other.  Cupric and ferric salts are the specified metal salts.  If the ether product is allowed to remain in the reaction medium it reacts with the hydroxy compound ROH to give an acetal CH3CH(OR)2.  The use of a large excess of cupric or ferric halide as the metal salt leads to the formation of b -chloroethyl alkyl or aryl ethers.  Quantities of acetaldehyde are produced, the amount being minimized by eliminating water as far as possible.  Ethylene is reacted with ethanol in the examples.
Patent GB-764154-A (GB)
Title: Improvements in or relating to transistor push-pull amplifiers
IPC: H03F3/26
Filed: 1955-02-11
Abstract: 764,154. Transistor amplifying circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Feb. 11, 1955 [Feb. 16, 1954], No. 4154/55. Class 40(6) In a push-pull amplifier comprising transistors 7, 8 in Class AB, B or C connection, the push-pull signal is supplied through blocking capacitors 5, 6 to the input electrode of the transistors, whilst in order to produce the required bias voltage, the input electrode is connected to a rectifier path having a pass direction which is opposite that of the transistor viewed from the input electrode concerned. The junction transistors 7. 8 have associated with the base-emitter path rectifiers 13, 14 and resistors 15, 16. The resistors 13, 14 are arranged to be equal to the forward resistance of the base-emitter path of the transistors 7, 8. The addition of the rectifier path preventing a voltage being built up on the capacitors 5, 6 due to rectification in the base-emitter paths of the transistors 7, 8. In a modification, Fig. 2, employing point contact transistors 21, 22 diodes 13, 14 are applied across the emitterbase-lead and are poled in the opposite direction from current flow in the emitterbase path. In a further modification Fig. 3 (not shown), the emitter-base path of each junction transistor acts as the rectifier path for the other.
Patent GB-267290-A (GB)
Title: Improvements in and relating to locating and communicating with sunken submarine vessels
IPC: B63G8/40
Filed: 1926-02-16
Abstract: 267,290. Land, J., and Land, H. Feb. 16, 1926. Buoys; sunken objects, indicating position of. -Apparatus for locating and communicating with sunken submarine vessels comprises an indicator buoy A, Fig. 3, provided with an electric lamp or other signalling means and a telephone instrument, and adapted to be released from the interior of the vessel and a box D<5> containing a drum for the buoy cable with means for making connection to the electric leads in the cable. The box D<5> is mounted on the deck in trunnion bearings so as to be free to rotate to allow the cable G to unwind freely. Stops H limit the rotation of the box, which is normally held stationary by a locking arrangement. The box is divided into two compartments. In one is the cable drum Q, Fig. 4, from one end of which a tube D<7> projects into the second compartment and is provided with a cover of insulating material to which are secured copper rings T<2> connected to the leads in the cable. Spring- pressed plungers W mounted in a terminal board U make contact with these rings. At the other end of the drum Q is a brake comprising a disc Y faced with friction material and pressed against the drum by a spring, and the projecting end of the shaft D<6> is squared to take a crank and handle. The cable G, Fig. 3, passes through a slot in the box and between two pairs of rollers M arranged to form an elongated rectangle. The cable consists of a wire rope core, electric leads for the lamp and telephone, and an insulating wrapping. The buoy is a hollow cylinder of wood or metal, with a wooden base D, Fig. 4, and a cork lid and a cork belt C. Lenses B, an electric lamp C<3> and a telephone instrument D<4> are provided. The buoy is normally held down on the deck by means of two sliding plates A<1> which engage in channel irons mounted under the base D. Guides 0 locate the buoy on the deck and springs P are used to ensure its release. The plates A', Fig. 5, slide in guides J and are pivoted to a disc S which can be rotated from within the vessel by means of a hand lever to disengage the plates A<1> from the channel irons. A lever L with a fulcrum at N is also pivoted to the disc S at one end and at the other to a further sliding plate A' which normally engages a slot in a plate K, Fig. 4, on the cable box, but which is withdrawn to allow the box to rotate when the buoy is released.
Patent GB-1236900-A (GB)
Title: Improvements in or relating to lithographic printing plates
Inventor: WATKINSON LEONARD JAMES
IPC: G03F7/021
Filed: 1968-05-17
Abstract: 1,236,900. Photo-lithographic material. HOWSON-ALGRAPHY Ltd. May 17, 1968, No.4405/71. Heading G2C. Pre-sensitized photo-lithographic plate for the deep-etch process comprises a support coated with a layer of (1) a diazo or azido compound in (2) hydroxyethyl cellulose. Preferably the support is Al or Al alloy anodized in H 2  SO 4  or H 3  PO 4 , (1) is diazodiphenylamine sulphate, its condensation product with paraformaldehyde, the Zn Cl 2  salt of this condensation product or 4, 4<SP>1</SP>-diazidostilbene- 2, 2<SP>1</SP>-disulphonic acid, and the layer contains a substance which absorbs 2700-4000 A radiation (e. g. Yellow dye Auramine, Chrysoidine or tartrazine).
Patent GB-723662-A (GB)
Title: Improvements in or relating to pilger mill apparatus
Inventor: MCLAY GAVIN SMELLIE
IPC: B21B21/00
Filed: 1952-02-19
Abstract: 723,662. Hydraulic accumulators. STEWARTS & LLOYDS, Ltd. May 11, 1953 [Feb. 19, 1952], No. 4412/52. Class 69 (2). [Also in Group XXII] The upper roll of a rolling mill is supported by two hydraulic rams 38, 39 supplied with normal pressure from a supply 51 during adjustment, &c., and with high pressure from an intensifier 64 before rolling to take up slackness in the mountings. Manually operated valves 62, 63 are actuated together to move an automatically operated slide valve 52 controlling the. supply of normal or intensified pressure to the rams. Specification 723, 655, [Group XXII], is referred to.
Patent GB-451949-A (GB)
Title: Improvements in couplings for scaffolding members
IPC: E04G7/20
Filed: 1935-02-13
Abstract: 451,949. Hinges. BURTON, J., 49, Sandon Road, Edgbaston, Birmingham. Feb. 13, 1935, No. 4596. [Class 65 (ii)] [See also Groups X and XXVIII] A clamp for joining scaffold members together, end to end, comprises clamping elements hinged together so that limited rocking movement can occur between the elements to accommodate slight variations in diameters of the members joined. In one form, a lug 13 on one clamping element 11 is engaged between a pair of spaced lugs 12 on the other clamping element 10, the hole 26 in the lug 13 being of double conical formation to allow of rocking movement of the element 11 on the hinge-pin 14, which passes through the lugs of the coacting element 10. Clamping is effected by means of a clamping bolt 22 passing through ears 15, 16 on the clamping elements, which are provided with mutually engaging stops 23, 24 to limit the opening of the elements. In a modification, Fig. 5, the aperture through the central lug 13 is cylindrical to receive the hinge-pin 14, and the apertures through the lugs of the element 10 are partly cylindrical and partly conical to allow of a rocking movement between the elements. A cylindrical plug 30 with central enlargement 31 may be used to position the tubular members prior to clamping.
Patent GB-290732-A (GB)
Title: Improvements in or relating to the lining or coating of metal pipes and other metallic tubular bodies
IPC: F16L58/18
Filed: 1927-02-18
Abstract: 290,732. Talbot, B. Feb. 18, 1927. Centrifugal m a c h i n e s.- Branched metal pipes &c. are provided with a bituminous or cementitious lining, applied centrifugally, by inserting a core in the branch with a closure for the outer end thereof, a balancing weight or weights being provided for the branch and core. As shown applied to a pipe a having a straight branch b, a core c is temporarily secured within the branch by a cap c' bolted to the flange b<1>. To balance the branch and core during the centrifugal process, 'a weight d is secured to the pipe a by straps e. Reference has been directed by the Comptroller to Specifications 208,058 and 263,509.
Patent GB-857932-A (GB)
Title: Improvements relating to methods for the purification of acetylene obtained by the cracking of gaseous hydrocarbons
Inventor: PATRON GERMANO
IPC: C07C7/171
Filed: 1959-02-10
Abstract: Acetylene is purified to remove other unsaturated hydrocarbons by washing with sulphuric acid of concentration above 95% by weight.
Patent GB-525037-A (GB)
Title: Improvements in and relating to aircraft engine cowlings or nacelles
IPC: B64D27/06
Filed: 1939-02-13
Abstract: 525,037. Aircraft cowling and nacelles. AMIOT, F. Feb. 13, 1939, No. 4648. Convention date, Feb. 14, 1938. [Class 4] An engine cowling or nacelle wall is supported from the aircraft structure by elements which may be replaced by others of different shape to alter the cross section of the cowling or nacelle to suit the particular engine employed. Metal sheets 6 forming part of the wall of a nacelle having a cross section of the shape I, Fig. 3, are supported by brackets 5 secured to the underside of the wing and to extensions 1 of ribs 2. The extensions 1 are braced by cross.members 3 and are formed at A, B, C and D for the attachment of an engine supporting frame 4 for an in-line engine. If it is desired to support a radial engine, the frame 4 of Fig. 1 is replaced by the frame 4 of Fig. 2 and the brackets 5 by others suitable for the cross-section of nacelle shown at II, Fig. 3. The top portion 8 of the nacelle wall is shown fixed, but may be replacable by other portions of different profile. The lower portion of the nacelle comprises sheets 7 hinged to the lower edges of the sheets 6 and which may be opened out to allow undercarriage 9 to be retracted into the nacelle.
Patent GB-123768-A (GB)
Title: Apparatus for Cleaning and Polishing Knives.
Inventor: TSCHAEPPAET HANS
IPC: B24B31/00
Filed: 1919-02-25
Abstract: 123,768. Tschõppõt, H. Feb. 25, 1918, [Convention date]. Knives, cleaning.-The knives, with cutting- edges leading, are passed through cleaning-material of a pulverulent nature. In the form shown, the knives are mounted in a rotatable shaft 3 and revolved to enter and pass through the cleaning agent such as moist sand contained in a stationary casing 1. A wood or other block 4 fixed to the shaft has two staggered rows of diamondshaped openings 8 into which the knife handles are thrust, and pivoted clamping-arms 9 are adapted to be forced down upon the knives by inclined wheels 12 rotatable on pins 13. In order to release the knives, the wheels are rotated to bring cut-away portions under the ends of the arms.