baber/WOPTO huggingface dataset:
Patent GB-677639-A (GB)
Title: Improvements in or relating to reflex view-finders for photographic or motion picture cameras
IPC: G03B19/12
Filed: 1949-05-09
Abstract: 677,639. Reflex view-flnders for photographic cameras. TELEMACO CORSI. May 9, 1949 [March 22, 1949], No. 12289/49. Classes 97 (i) and 98 (i). A reflex view-finder for a photographic or motion-picture camera of the kind in which the image for focusing and framing is provided by the camera lens 1 comprises a movable mirror 2 to reflect the image beam formed by the camera lens towards a ground glass surface 4 on which the image is formed, and a pentagonal prism modified in that one of the reflecting surfaces 5 thereof is convex outwards, so as to provide for an enlargement of the image in the path of the light beam within the prism in which the image is re-inverted to be viewed by an observer. Preferably, another reflecting face of the prism is formed by two faces intersecting at right-angles in a line 3. When the entry face 4 is plane it may be ground to receive the image. When the entry face 4 is convex or concave, the image is formed on an adjacent ground glass screen. The exit face 6 may be plane, convex, or concave. The prism may be in one piece, or may be made up of several pieces cemented together. Lens elements may be cemented to the block to form the curved faces, each lens having two parts of different refractive indices to correct aberrations. A compensating astigmatic eye-piece may be interposed between the prism and the observer's eye. The reflecting, surface 5 may be cylindrical, the exit surface 6 being also cylindrical with its axis perpendicular to that of surface 5.
Patent GB-593161-A (GB)
Title: Improvements in or relating to electric facsimile transmission systems
IPC: H04N1/40
Filed: 1945-05-16
Abstract: 593,161. Copying telegraphy. CREED & CO., Ltd., and MASON, F. P. May 16, 1945, No. 12313. [Class 40 (iii)] To eliminate ripple and ripple modulation of signals, resulting from the use of an A.C. operated light source in a facsimile transmitter, the gain of an amplifier amplifying the output is varied in accordance with the intensity of the light source. Fig. 1 shows an arrangement in which the potentials produced by P.E. cell 6, as sheet 4 is scanned, are modulated on to a carrier in device 7 and applied to variable mu valve 9. The gain of valve 9 is varied inversely with the intensity of the light source 1, by amplifying the output of photo-cell 15, illuminated by source 1 and applying it through variable attenuator 11 to the grid of valve 9. To remove the ripple frequency from the output, a band-pass filter 14 is provided, the output of the filter driving buffer stage 19 which modulates transmitter 21. In an alternative arrangement, the sheet is scanned by a beam modulated by means of an apertured disc and device 7 acts purely as an amplifier. Fig. 2 shows an arrangement for correcting the signals before they are modulated on to a carrier, in which they are applied across resistors 24 and 25 to valves 26 and 27, arranged in push-pull, a pushpull arrangement being used as the ripple frequency components in the output then cancel. Specification 480,483 is referred to.
Patent GB-735387-A (GB)
Title: Improvements in inertia responsive elements
IPC: G01P15/03
Filed: 1953-05-04
Abstract: 735,387. Speed and inertia governors. HOBSON, Ltd., H. M., and EDWARDS, T. April 2, 1954 [May 4, 1953], No. 12335/53. Class 57. [Also in Group XXIV] A modified form of the inertia governor of Specification 712,646 comprises a fly-wheel 14 coaxial with, and free to rotate a certain amount relatively to, a driving shaft 11. The fly-wheel is supported by bearings 15 in a casing 10, 12 secured to the driving shaft, and balls 21 in inclined slots 20 of a sleeve 18 secured to casing 12 co-operate with axial slots 22 in the base of the fly-wheel and annular grooves 24 of an axially - movable fuel control member 23. Accelerations and decelerations produce axial movements in one direction or the other of member 23.
Patent GB-1517587-A (GB)
Title: Dredging pipe
IPC: F16L27/02
Filed: 1976-03-26
Abstract: 1517587 Dredging pipe BALLAST-NEDAM GROEP NV AMSTERDAMSE BALLAST BAGGER EN GROND (AMSTERDAM BALLAST DREDGING) BV and SCHEEPSWERF EN MACHINEFABRIEK DE LIESBOCH BV 26 March 1976 [15 April 1975] 12352/76 Headings F2G and F2P [Also in Division El] A dredging pipe comprises two relatively pivotable, rigid pipe portions 3 and an intermediate, flexible pipe portion 4 of reinforced, elastic material wherein the flexible portion 4 is longitudinally aligned between the rigid portions 3 in a prestressed and compressed state. The rigid portions 3 may be interrupted by a universal joint 5. The wall of the flexible portion 4 may consist of rubber reinforced by a tissue of crossed, metal wires and a transverse reinforcement consisting of a helical steel spring.
Patent GB-552200-A (GB)
Title: Improvement in engine starter drive
IPC: F02N15/06
Filed: 1941-09-24
Abstract: 552,200. Turning-gear. BENDIX AVIATION CORPORATION. Sept. 24, 1941, No. 12387. Convention date, Nov. 5, 1940. [Class 7 (v)] In an engine-starter drive including a screw shaft 4 slidably journalled on a power shaft 1, a nut 12 on the screw shaft and limited in longitudinal movement thereon by a stop 6, a pinion 7 slidably journalled on the power shaft and rigidly connected to the nut, and a barrel member 15 fixed to the shaft 1, a flange member 21 fixed on the screw shaft 4 and splined to the barrel 15 bears against an elastically compressible member 23 within the barrel. As shown, an annular member 9 is rigidly connected to the pinion 7 at 11 and to the nut 12 by a tongue-and-groove connection 13 and a lock ring 14. The screw shaft 4 is slidably journalled on a sleeve 2 fixed to the shaft 1 and is loosely confined between the stop 6 and a drive head 5 on the sleeve. The barrel member 15 is fixed on the drive head 5 and formed with straight or inclined tongues 18 sliding in grooves 19 in the flange 21, a compressible ring 23 of rubber or the like being loosely interposed and seating on a shoulder 24 on the flange 21. A re-entry spring 25 and an anti-drift spring 26 are provided.
Patent GB-853592-A (GB)
Title: Derivatives of novobiocin
IPC: C07H13/12
Filed: 1957-04-16
Abstract: The invention comprises methyl 3-carbamyl-4-methylnovobioside and 3-carbamyl-4-methylnovobiose having respectively the formulae : <FORM:0853592/IV(b)/1> and the preparation thereof by reacting novobiocin with a non-oxidizing mineral acid in methanolic solution to produce the former compound with the optional further step of reacting the product with a dilute aqueous nonoxidizing mineral acid solution to produce the latter compound.  A suitable non-oxidizing mineral acid is hydrochloric acid.  The invention also includes (a) a process for the preparation of 3-carbamyl-4-methylnovobiose diethyl mercaptal of the formula :  <FORM:0853592/IV(b)/2> by reacting methyl 3-carbamyl-4-methylnovobioside with ethyl mercaptam in the presence of hydrogen chloride with optional further items of reacting the product with Raney nickel to produce 3-carbamyl-4-methyl-1-deoxynovobiose of the formula: <FORM:0853592/IV(b)/3> hydrolysing this compound with sodium hydroxide to form 4-methyl-1-deoxynovobiose of the formula: <FORM:0853592/IV(b)/4> and treating this compound with carbamyl chloride to form 3-carbamyl-4-methyl-1-deoxynovobiose and 2-carbamyl-4-methyl-1-deoxynovobiose ; and (b) a process for the preparation of methyl 4-methylnovobioside of the formula: <FORM:0853592/IV(b)/5> by heating methyl 3-carbamyl-4-methylnovobioside with sodium hydroxide with the optional further step of reacting the product with carbamyl chloride to form methyl 3-carbamyl-4-methyl-novobioside of the formula given above and methyl 2-carbamyl-4-methylnovobioside.  Detailed examples are given.  Specifications 821,819 and 821,820 are referred to.
Patent GB-920123-A (GB)
Title: Process for the manufacture of compact and finely particulate silicon and silicon compounds containing si-si bonds in the same apparatus
IPC: C01G30/00
Filed: 1959-04-13
Abstract: Particulate Si or Si compounds having Si-Si bonds are produced by passing a gaseous stream containing a halogen- or oxygen-containing silicon compound over one or more Si bodies heated by passage of electric current in a reaction vessel with cooled walls. Alternatively the Si or Si compound may be produced in compact form on the body by diluting the gas stream with a noble gas, hydrogen or a compound containing hydrogen.  In an example, Si chloroform is passed over a heated silicon spiral or tube.  Particulate Si is recovered from the gaseous reaction products by filtration &c. Alternatively the gaseous reaction products may be condensed and the Si removed therefrom by centrifuging or filtration.  Production of Si2Cl6, SiCl4, Si3Cl8, Si2HCl5, Si3Cl6H2 is also referred to.
Patent GB-967738-A (GB)
Title: Improvements in and relating to electrical vacuum switches
Inventor: CHUBB JOHN NORMAN
IPC: H01H33/664
Filed: 1960-08-23
Abstract: 967,738. Vacuum switches. ENGLISH ELECTRIC CO. Ltd. July 11, 1961 [Aug. 23, 1960], No. 12548/64. Divided out of 967,737. Heading H2B. A vacuum switch has relatively movable contacts 22, 23 separable within fixed electrodes 20, 21 having facing cylindrical surfaces, the arc struck between the contacts being transferred to the electrodes and rotated along the electrodes by a magnetic field. The transfer of the arc is assisted by providing radially directed apertures 20a in the inner electrode 20 and by forming the electrodes of a metal having a lower arcing voltage than that of the contacts. The magnetic field may be provided by a coil energized by alternating or direct current or by a permanent magnet. The ends of the electrode surfaces may be curved.
Patent GB-310340-A (GB)
IPC: D21H19/10
Filed: 1929-04-23
Abstract: 310,340. I. G. Farbenindustrie Akt.- Ges. April 23, 1928, [Convention date]. Waterproofing.-Paper is smoothed by coating it with melted hydrocarbon, or wax, or resin, or a mixture of such materials, and conducting it over a support heated above the melting point of the coating material while removing excess of coating material by means of a flexible scraper. The scraper may conveniently be made of rubber. The heated support may be extended to subject the paper to an elevated temperature for some distance after scraping.
Patent GB-615609-A (GB)
Title: Improvements in tiles
IPC: B44C5/04
Filed: 1947-05-09
Abstract: 615,609. Facing tiles. HART, S. A. May 9, 1947, No. 12614. [Class 87(i)] A thermo-plastic tile is provided on its rear face with a marginal flange 2 preferably bevelled on its outer sides, variously arranged ribs 3, and projections 4 preferably undercut. The tiles may be flat or curved.
Patent GB-1149828-A (GB)
Title: An improved clip
Inventor: SECKERSON CLIFFORD ALEXANDER
IPC: B60J10/00
Filed: 1967-03-15
Abstract: 1,149,828. Clips; stud and socket fastenings. F. T. PRODUCTS Ltd. 18 March, 1968 [17 March, 1967], No. 12776/67. Heading E2B. A resilient clip 10 for attaching an article 21 to a support surface from which a headed stud 24 projects outwardly, comprises a U- shaped portion having a web 13 and two limbs 11, 12, a slot 15 extending through the web and terminating in the two limbs, a tongue 17 sheared from one of the limbs and bent out of the plane of the one limb so as to lie between the two limbs with its free end adjacent the web, and an arm 19 integral with and forming an extension of the one limb 11, the arm extending across the open mouth of the U-shaped portion, and the slot comprising a wider portion extending through the web and a narrower portion located in the other limb 12. As shown, the article 21 in a moulding for a windshield 22 supported by a framework 23 which carries the stud 24. In use, the clip 10 is slid over the stud so that the shank 25 thereof is located in the narrow portion of the slot with the head of the slot located between a flange 14 and a lug 18 on the tongue 17. In a modification, the tongue may project beyond the web.
Patent GB-1510314-A (GB)
Title: Lithographic printing plate precursor
IPC: G03F7/004
Filed: 1975-03-26
Abstract: 1510314 Lithographic printing plate precursor FUJI PHOTO FILM CO Ltd 26 March 1975 [26 March 1974] 12795/75 Heading G2C A light-sensitive lithographic printing plate precursor, which can be imagewise exposed and then used for printing without any processing step, comprises a support having deposited thereon in the absence of a binder (i) microscopic particles of a composition containing germanium and sulphur and (ii) microscopic particles of a metal (including selenium or tellurium) and/or a compound of such a metal, the deposition being such that there are areas of the support covered by particles of either type (i) or type (ii) above, areas covered by both type (i) and type (ii) particles and areas not covered by either type (i) or type (ii) particles. The particles (i) and (ii) may be deposited on the support by vacuum-depositing (a) a composition of fused germanium and sulphur and (b) a metal or metals or a metal compound, simultaneously or in either order. Areas not covered by particles (i) and/or (ii) are obtained by using a sufficiently low deposition so that individual particles do not aggregate, or by conducting each deposition through a stainless steel mesh screen, the screens for each deposition being out of register. In addition to germanium and sulphur, the composition for particles (i) may contain other elements e.g. Ag, Al, Bi, Sb, Pd, Cu, Mo, Sn, Pb, Ta, Ni, Co, Mn, Ti, Mg, V, W, Si, Ci, P, O or I. Metals specified for particles (ii) are Ag, Au, Cu, Mg, Al, In, Ga, Pb, Tl, Sn, Cd, Cr, Fe, Ni, Co, Mn, Bi, Sb, Pd, V, Ge, Se and Te; metal compounds specified are Ag2S, AgI, Ag 4 P 2 O 7 , CuS, Cu2S, CuCI, CuI, PbS, PbI 2 , PbO, SnS, CdS, FeS, Fe2S3, Bi 2 S 3 , Bi 2 O 3 , Ge 2 O 3 , TeO 2 , ZnS, TeCl 4 , TiO 2 , MoO 3 , V 2 O 5  and HgI. Depending on the nature of the Ge and S composition and the metal or metal compound used, positive-working or negative-working precursors and obtained. Owing to the light-sensitive nature of the plate, printing is conducted in the dark.
Patent GB-1000564-A (GB)
Title: Improvements in or relating to master cylinders
IPC: B60T11/20
Filed: 1963-04-01
Abstract: 1,000,564. Master cylinders. H. TEVES, E. A. TEVES, and M. TAUSEND, [trading as ALFRED TEVES MASCHINEN-UND ARMATURENFABRIK KOMM.-GES.]. April 1, 1963 [April 19, 1962], No. 12803/63. Heading F2F. A master cylinder 1 for a vehicle braking system has connections 20, 21 to the rear drum brakes and front disc brakes respectively, and is provided with tandem actuator and floating stepped pistons 5, 2, the latter having large and small portions 3, 4. A compressed spring 23 is mounted between the actuator piston 5 and the large stepped portion 3, and a stronger compression spring 17 between the portion 3 and a disc 16 mounted in a shoulder in the cylinder and serving as a stop for either direction of movement of piston 2. Upon actuating piston 5, pressure liquid first passes through connection 20 to the rear brakes, piston 2 being held stationary by spring 17, but as the pressure rises piston 2 delivers liquid through connection 21 to the front brakes, the reduced diameter of the end portion 11 of the cylinder resulting in an increased pressure for operating the disc brakes.
Patent GB-272870-A (GB)
IPC: F22B31/00
Filed: 1927-05-13
Abstract: 272,870. International Combustion Engineering Corporation, (Assignees of Lorenzi, O. de.). June 18, 1926, Convention date]. Pulverulent-fuel furnaces.-In a furnaceshaped boiler heated by pulverulent fuel, the burners are so arranged that the flame passes through the furnace approximately horizontally in the form of a vortex. The burners 28, Fig. 1, are arranged in a vertical plane at the corners of the combustion chamber at the front thereof and directed inwardly to deliver fuel tangentially to a circle. The side walls of the combustion chamber are formed by tubes 11 provided with fins 21 and connected to upper and lower headers 12, 13 in turn connected to drums 7, 8. Tubes 14 form the roof of the combustion chamber and a row of spaced tubes 16 are arranged at the base. The tubes 14, 16 are connected respectively to the drum 7 and header 17, in turn connected to the drum 8, and also to headers 15, 18- connected by tubes 10 forming the front wall. The gases escape from the combustion chamber preferably at the upper end of a rear bank of tubes 9 provided with baffles to an offtake 24 provided with an air heater 25. Air passes from the latter to a. conduit 27 leading to a box 26 from which it passes to the furnace through openings 22. Specification 237,194 is referred to.
Patent GB-500347-A (GB)
Title: Improvements in and relating to magneto generators
IPC: H02K21/18
Filed: 1937-05-06
Abstract: 500,347. Magnetos. BENDIX AVIATION CORPORATION. May 6, 1937, No. 12923. Convention date, May 7, 1936. [Class 35] A magneto, particularly for ignition in internal-combustion engines comprises a rotary cylindrical permanent magnet 16 having at the ends polar members r7, 18 with a rounded polygonal perimeter, each polar member occupying the major part of and being confined to half the length of the rotor, and a stator 4 having a pair of pole elements 5, 6 each of which has a continuous shoe extending substantially the whole length of the rotor and arranged to co-operate simultaneously with a rounded portion of one and then of the other of the polar members alternately. The laminated polar members 17, 18 as shown are square with rounded corners and are held non rotatably on a squared portion of the rotor shaft by end plates 22, 23, having square central openings. The rotor assembly which also includes a centring ring 28 for the polar members surrounding the magnet is held on the spindle between a ring 29 bearing against a shoulder 31 and a ring 32 screwed on to the spindle and secured by rivets. Each stator polepiece has two polar projections 34, 35 spaced to co-operate simultaneously with two rounded lobes 24 or 25 of the rotor poles. The elements 17, 18 are angularly displaced by 45‹ so that eight flux reversals are produced per revolution of the rotor.
Patent GB-712757-A (GB)
Title: Improvements in and relating to slide valves
IPC: F16K3/314
Filed: 1951-05-31
Abstract: 712,757. Wedge valves. MASCHINENFABRIK MEER AKT.-GES. May 31, 1951 [Sept. 1, 1949], No. 12931/51. Class 135 A valve comprises a wedge-shaped closure member formed of discs 6, 6', Fig. 1, secured to a crosshead 2 by bayonet joints, each joint comprising two diametrically opposed arcuate flanges on the disc engaging recesses in the crosshead. Disengagement of the joints is prevented by locking means, e.g. grub screws 9, Fig. 2. A cube-shaped thrust element 10 is positioned between the discs and has semicylindrical bearing surfaces at right angles to each other engaging complementary recesses in the discs, which are therefore permitted slight relative movement in planes at right-angles to each other. The axes of the bearing surfaces are substantially 45 degrees on each side of the longitudinal axis of the operating stem 1.
Patent GB-879273-A (GB)
Title: Catalysts containing alumina and process for the preparation thereof
IPC: B01J23/882
Filed: 1959-04-16
Abstract: A composition used for the preparation of catalysts is prepared by intimately dispersing small particles of a clay in a synthetic alumina or alumina-silica hydrogel containing up to 15% silica and spray-drying the resultant product into microspheres, the clay constituing 20-85% by weight of solids in the spray-dried composition.  The clay may be a kaolinite (and part of the alumina thereof may be removed by an acid treatment) or a montmorillonite; the preferred clay is a kaolinite of hexagonal crystal structure in the form of thin plates, which has at least 10% by weight of colloidal particles and contains up to 2% iron expressed as Fe2O3. The hydrogel may be mixed as an aqueous slurry with the clay, preferably using a peptising agent, or may be precipitated on the latter in situ, the clay in this case being dispersed either in an alkaline aluminate solution or in an acidic reagent prior to the formation of the hydrogel.  The composition may be used as a carrier for the oxides and other compounds of the following elements: -V, Mn, Zn, Sc, Fe, Co, Cr, Cu, Ti, Ni, Cb, Ma, Y, Rh, Pd, Mo, Hf, Ru, Zr, Ir, Ag, La, Pt, Th, Hg, U, Au, W, Cd, Re, Ta, Os and Ac; the carrier may also incorporate CaO, MgO, phosphates, fluorides, ZrO2, TiO2 and/or ThO2.  Preferred catalysts contain 0.5-20% of MoO3 or of a MoO3/CoO combination.  It is stated that the microspheres can be used as such for cracking hydrocarbons or, when impregnated with Mo, for hydroforming or, when impregnated with Mo + Co, for hydrodesulphurising and in either case for hydrocracking reactions.
Patent GB-770971-A (GB)
Title: Machine for assembling resilient bushings
IPC: B25B27/28
Filed: 1955-05-04
Abstract: 770,971. Assembling resilient mountings. GENERAL TIRE & RUBBER CO. May 4, 1955 [May 11, 1954], No. 12953/55. Class 108(3). A machine for assembling resilient bushings having a tubular rubber insert A under radial compression between an outer rigid sleeve B and an inner rigid core C comprises a head 8 mounted for linear movements and having a sleeve receiving and supporting socket 25, means 20 for supporting the core C in axial alignment with the socket 25, means for supporting the insert A independently of the sleeve B and the core C, comprising a pressure applying and clamping member 14 having an opening 24 through which the core C may pass, means for advancing the head 8 towards the core supporting means 20, and means operable during the advancing movement of the head 8 for applying thrust to the pressure applying and clamping member 14 to force an insert A into the sleeve B positioned within the socket 25. The core supporting means comprises a plunger 20 mounted adjustably at 21 on a base plate 1. Posts 4, 4, rigid with the base plate 1 support a main pressure cylinder, Fig. 1 (not shown) containing a piston, the rod 7 of which is connected to the head 8. The latter is rigid with a cross head 9 guided for vertical movement by posts 11, 11, rigid with the base plate 1. The pressure applying and clamping member 14 comprises a cross head 14 also slidable with respect to the posts 11, 11, and suspended from pistons 13, 13, working in pneumatic cylinders 12, 12, rigid with the cross head 9. The top of the main cylinder is connected by fluid pressure piping to the bottom of each of the cylinders 12, 12. The bottom of the main cylinder is similarly connected to the top ends of the cylinders 12, 12. Fluid pressure is normally applied via a valve, Fig. 5 (not shown) to the upper end of the main cylinder. Energization of a solenoid causes the valve to be reversed to apply pressure to the lower end of the main cylinder and to the upper end of the cylinders 12, 12. The solenoid is energized by the operation of a pair of switches connected in series and mounted respectively on the posts 4, 4. In operation, the pressure connections are such that the cross head 9 is at the top of its travel and the cross head 14 is spaced at its maximum distance from the cross head 9, Fig. 1 (not shown). A core C and pilot 29 are placed in position on the plunger 20. An insert A is placed in position in a socket 23 on the cross head 14. A sleeve B is placed in position in the socket 25, being retained by a ball catch 26, Fig. 2. On operation of the switches on the posts 4, 4, pressure is reversed in the three cylinders. This causes the cross head 14 to be raised relative to the cross head 9 to force the insert A into the sleeve B. At the same time the cross head 9 is forced downwardly until the sleeve B and insert A are entered over the pilot 29 and core 22.