baber/WOPTO huggingface dataset:
Patent GB-1292239-A (GB)
Title: Improvements relating to photographic cameras
IPC: G03B19/12
Filed: 1971-04-19
Abstract: 1292239 Photographic cameras POLAROID CORP 19 April 1971 [15 April 1970] 26974/71 Heading G2A A photographic camera 10 Fig.2 has in the optical path between a focusing lens 14 and its focal plane specular reflector means 62,64 for establishing the focal plane either at an exposure plane containing photo-sensitive material 50 when the camera is operating in an exposure mode or at a viewing surface 104 overlying the exposure plane when the camera is operating in a focusing mode. The specular reflector 64 is mounted in a frame 78 which pivots about an axle 82 from the focusing mode shown to the exposure mode in which the reflector 64 is positioned adjacent reflector 62. Reflector 64 has a first reflecting surface 104 which when in the exposure mode reflects the image to the photo-sensitive material, and a second reflecting surface formed as an echelon lens viewing surface which is viewed through a viewing arrangement 32. The camera shutter, Fig.6, has opening 142 and closing 144 blades and a cover blade 140 containing an exposure aperture 154. During an exposure operation, the shutter release 18 is depressed to move the cover blade so that its exposure aperture is in alignment with the focusing lens and at the same time charges the shutter blade driving springs. The opening blade is released by movement of the latch 162 holding the blade upon the cover blade reaching its uncovering position, and the closing blade is released by de-energisation of an electromagnet 156 at a time control by circuit 180. Release of pressure on shutter release 18 enables spring 158 to restore all blades to their initial position. During the focusing mode, shutter release 18 is rotated to operate a switch 190 which deactivates control circuit 180 so that the shutter is held open, and at the same time a solenoid 136 is energised to move a capping blade 118, Fig.2, so as to permit observation of the image on surface 64. During the exposure mode, blade 118 covers viewing device 32 and reflector 64 is held adjacent reflector 62 by energisation of an electromagnet 98.
Patent GB-1557710-A (GB)
Title: Coupling device and method
IPC: B29C65/00
Filed: 1976-06-29
Abstract: Described herein are coupling means for joining substrates, for example, tubular articles, which include an inner member, having disposed thereon a fusible agent for binding the substrates together, and an outer member. The substrates to be joined are inserted between the fusible agent and outer member and the resulting assembly is heated. The application of heat is maintained until it permeates the assembly and raises the temperature of the fusible agent enough that it melts and flows through and/or about the substrates to be joined. The inner and outer members act to confine the melted fusible agent by defining boundaries between which it can flow. Longitudinal flow of the agent can be controlled by limiting the area heated, by the configuration of the coupling members or substrates, or by providing the coupling with additional members that "dam" longitudinal flow. When the heating is discontinued, the fusible agent hardens to bind the substrates together. Either the inner member, outer member, or both may be a heat recoverable or spring member to provide compressive forces in the area of the joint being formed to facilitate the flow of the fusible material.
Patent GB-1271766-A (GB)
Title: Process for the purification of gases and vapours
Inventor: BIJLEVELD EDUARD
IPC: C08J9/28
Filed: 1970-06-04
Abstract: 1,271,766. Separating gas mixtures by adsorption. OCTROOIEN MAATSCHAPPIJ "ACTIVIT" N.V. 4 June, 1970 [4 June, 1969], No. 26998/70. Heading B1L. A sorbent of use in the separation of gas and/or vapour mixtures comprises beads of a macroporous insoluble polymer based on monomeric vinyl- or divinyl-aromatic compounds, unsaturated esters, substituted vinyl compounds and derivatives of unsaturated acids or nitriles, the polymer containing polar or polarisable non-disociable halogen, nitro, hydroxyl, ester, aldehyde, ketone, amide, nitrile, acetyl or methylol groups. Preferred polymers are a copolymer of styrene with 2-80% by weight of divinylbenzene which contains nitro, chloro or acetyl groups, and a copolymer of methyl methacrylate with glycol dimethacrylate. Separations of toluene, methanol, sulphur dioxide, n-butanol, and acetone in each case from air are described.
Patent GB-721512-A (GB)
Title: Process for the preparation of soluble chlorinated rubber from latex
IPC: C08C19/14
Filed: 1952-10-28
Abstract: Chlorinated rubber which is soluble in the usual paint and lacquer solvents is made from rubber latex by stabilizing the latex against coagulation while adding acid until the latex is at least 2N, chlorinating at 0 DEG -50 DEG C. until a chlorinated rubber of chlorine content at least 50 per cent. is formed, forming a dispersion of not more than 30 per cent solids, by diluting with water or by precipitating and redispersing in water, while adjusting this dispersion to between 0 and 8N acid or between 0 and 6N alkaline, chlorinating at 0 DEG -90 DEG C until a sample of the product, obtained by precipitating, e.g. with hot water, and drying, is completely soluble in toluene, and then, if desired, precipitating the chlorinated rubber and separating it from the p  aqueous liquid. Specifications 390,097 and 634,241, and U.S.A. Specification 2,021,318 and French Specification 793,607 are referred to.
Patent GB-362526-A (GB)
Title: Antifouling composition
IPC: C04B24/00
Filed: 1930-09-10
Abstract: An antifouling composition consists of an hydraulic binder such as Portland cement or hydraulic lime, mixed with a poisonous substance which may be an organic substance such as powdered chrysanthemum cinerariaefolium, degreased seeds of ricinus communis, dried juice of euphorbia tirucalli or extract of derris elliptica, or a mineral substance such as cadmium carbonate which does not act upon an iron surface.  The poisonous substance may be sprayed or painted on to the binder after application.  Fillers such as sand and mineral fibres such as asbestos may be added.ALSO:An antifouling composition consists of a hydraulic binder such as Portland cement or hydraulic lime mixed with a poisonous substance which may be an organic substance such as powdered chrysanthemum cinerariaefolium, degreased seeds of ricinus communis, dried juice of euphorbia tirucalli or extract of derris elliptica, or a mineral substance such as cadmium carbonate which does not act upon an iron surface.  The poisonous substance may be sprayed or painted on to the binder after application.  Fillers such as sand and mineral fibres such as asbestos may be added.
Patent GB-260102-A (GB)
Title: Improvements relating to door handles
IPC: E05B3/06
Filed: 1925-10-28
Abstract: 260,102. Hopkins, C. V., and Cartland & Son, Ltd., J. Oct. 28, 1925. Handles, attaching. - In handles of the type in which discs or washers having a sliding but non-rotatable fit in the spindle are attached to the handle, the discs or washers are secured to the handle by lugs on the handle passing through holes in the discs or washers and riveted over. The handle shank a has a number of lugs c which penetrate the holes e in the washers f and are riveted over. The rose-plate d is secured between the shank and the washers. The washers have a central square or like hole g for the spindle h.
Patent GB-772122-A (GB)
Title: Improvements in or relating to alkaloid extraction processes
IPC: C07D459/00
Filed: 1955-09-22
Abstract: The valuable weakly basic alkaloids are extracted from Rauwolfia plant material containing also the strongly basic alkaloids by treating said material with water to hydrolyse the salts of the weak bases and extracting the latter with an aromatic hydrocarbon.  The preferred procedure is to moisten the material with 0.5-1.2 parts by weight of water (e.g. 0.8 parts), allow to stand for up to 5 hours and then treat with benzene or toluene at 40-80 DEG  C.  The starting material may be dry powdered material of R. serpentina, R. vomitoria, R. canesceus, R. heterophylla, R. inebrians or R. hirsuta.  The alkaloids may be obtained from the aromatic hydrocarbon extract by treatment with dilute acid (e.g. 5-10 per cent phosphoric acid), neutralization of the acid extract (e.g. to pH 6.5-7.0 with sodium bicarbonate), re-extraction with a water-immiscible solvent such as benzene or methylene chloride and recovery from this extract. Alternatively the aromatic hydrocarbon extract may be evaporated to dryness and repeatedly boiled with petroleum ether to remove fats and waxes. Reserpine can be recovered at any stage by chromatographic adsorption on alumina and elution with benzene and/or acetone.  It is stated that rescinnamine may also be obtained.  Specification 734,108 is referred to.
Patent GB-386371-A (GB)
Title: Improvements in and relating to electric power converting apparatus
IPC: H02M7/51
Filed: 1931-09-29
Abstract: 386,371. Converting. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Garman, G. W. ; 98, Reynolds Street, Scotia, New York, U.S.A.) Sept. 29, 1931, No. 27125. Convention date, Sept. 29, 1930. [Class 38 (ii).] In an arrangement for converting D.C. from a source 10 into polyphase A.C. for supply to a load circuit 11 and comprising a set of " discontinuous control valves 12, 13, 14, one for each phase, provision is made whereby the period of positive grid potential for each valve is limited to a time interval'less than that in which the valve is conducting. The primary winding A, B, C of the main transformer is zig-zag connected so that as current flows in turn in the several phases as the associated valves are rendered conductive in succession, current half waves of opposite sign are produced in succession in the secondary phases A<11>, B<11>, C<11>. Commutating voltages are produced in turn in the condensers 15, 16, 17 connected across the primary phases, which voltages serve to stop current in the conducting valve as the succeeding valve is rendered conductive. The grids of the valves are normally negatively biased by a battery 18 but are rendered momentarily positive in turn to start the valves in succession by superimposed A.C. voltages derived from a transformer 22. The latter is arranged to operate at saturation in order to produce voltages of peaked wave form thus limiting the duration of positive voltage on the grids.
Patent GB-774658-A (GB)
Title: Improvements in or relating to rotary piston machines, especially for use as compressors
IPC: F04C18/36
Filed: 1955-09-23
Abstract: 774,658. Rotary compressors. FAWZI, M. I. Sept. 23, 1955 [Oct. 16, 1954], No. 27149/55. Class 110 (2). A rotary compressor or the like of the rotary abutment type has a rotor with at least two projections which cooperate with a recess or recesses in at least one rotary abutment characterized in that the profile of each projection is of epicyclic shape and each recess is bounded by straight lines. Fig. 3 shows a compressor in which a rotary abutment 2 having a, recess 11 controls a discharge part 24 as a rotary valve so that the fluid being conveyed is compressed by a projection 6 before being discharged. In other embodiments the rotor may have two or four projections while the abutment has two recesses, or the rotor may have n projections co-operating with n-1 abutments, each having two recesses. The rotary abutment may be a plane plate. Labyrinth sealings may be arranged between co-acting sealing surfaces.
Patent GB-1453346-A (GB)
Title: Flanged coupling for piping
IPC: F16L23/028
Filed: 1974-06-19
Abstract: 1453346 Pipe couplings PONT-A-MOUSSON SA 19 June 1974 [27 July 1973] 27156/74 Heading F2G A pipe coupling comprises a cylindrical elastic sealing element 17 having in its centre part an annular recess 18 in which is disposed a rigid cylindrical maintaining ring 16, a sleeve 15 having an integral radial flange 21 for connection to the flange of another pipe member, a cylindrical part 23 and a frusto-conical part 24 surrounding and confining the sealing element 17. In a second embodiment the sleeve 15 has a separate annular flange made in two halves, which locates through an internal radial step abutting a shoulder at the frusto-conical end of the sleeve.
Patent GB-640393-A (GB)
Title: Improvements in or relating to spinner structures for aircraft power-plant installations
Inventor: GREATREX FERDINAND BASIL
IPC: B64C11/14
Filed: 1947-10-10
Abstract: 640,393. Screw propellers. ROLLS-ROYCE, Ltd. Oct. 10, 1947, No. 27312. [Class 114] A spinner has concentric structures 13, 14, between which is an air passage, the crosssection of which is adjusted so that in the way of the fairings 17 of the propeller blades, the effective cross-section is maintained constant. The fairing is formed so that its angle of incident to longitudinal flow is progressively increased at increasing radii.
Patent GB-408243-A (GB)
Title: Improvements in folding boxes
IPC: B65D5/34
Filed: 1932-10-03
Abstract: 408,243. Folding boxes. TILLOTSONS (LIVERPOOL), Ltd., and SMITH, D., Commercial Road, Liverpool. Oct. 3, 1932, No. 27351. [Class 18.] A folding cardboard, paper &c. box with a hinged lid of the kind in which the cover or the base projects outwardly beyond the side, back and front walls is obtained by forming the side and front walls 11, 12, 13 from a band integral with or stitched, glued &c. to the main blank, connected thereto also at 18 and hinged about lines 20, 21 inset from the hinge lines 22, 23, 24, 25, of flaps 6, 19 on the base and cover panels which fold inwards to form edges of double thickness, Flaps 5, 9 fold inwards to form double thickness edges for the fronts of the cover and base, a flap 4 forms a flange for the lid and flaps 10, 16, 17 form flies in the box mouth. Flaps 14, 15 fold inwards to lie on the bottom and flaps 26, 27 close the front corners.
Patent GB-804540-A (GB)
Title: Improvements in or relating to the preparation of manganese-bismuth alloys
IPC: C22C28/00
Filed: 1957-08-30
Abstract: 804,540. Ferromagnetic manganesebismuth alloys; annealing. WESTERN ELECTRIC CO., Inc. Aug. 30, 1957 [Sept. 20, 1956], No. 27370/57. Classes 72 and 82(1) Manganese - bismuth alloy having the consitiuents present in equiatomic proportions is prepared by forming a molten mass of the constituents, solidifying the molten mass sufficiently rapidly to prevent substantial phase segregation, e.g. at an average rate of at least 50‹C. per minute between 1000 and 250‹C., and then subjecting the solidified material to a heat treatment at a temperature between 250 and 445‹C. to convert the phases to a large extent to manganese - bismuth alloy. Orientation of the grains of the alloy can be effected by carrying out the heat treatment, preferably between 260 and 350‹C., in an applied magnetic field, eg, having a field strength of at least 10,000 oersteds. The heat treatment may be carried out in the apparatus shown in Fig. 5 in which a block 12 of the alloy is placed between blocks 11 of a magnetic material such as iron in a sealed tube 5 with tubes 8 and 9 for the circulation of inert or reducing gas and a tube 7 for a thermocouple 10. The tube 5 is enclosed by a glass tube 3 which is surrounded by a heating coil 4 and an electrically conducting coil 1 wound on a core 2 to provide the magnetic field.
Patent GB-338635-A (GB)
Title: Method of increasing the percentage of moisture in corn, fruits and other vegetable materials
IPC: B02B1/00
Filed: 1929-09-09
Abstract: 338,635. Jonsson, A. E. Sept. 9, 1929. Treatment by damping.-Corn, fruit, or other vegetable material is placed in an airtight vessel from which the air is abstracted, a suitable quantity of water is added to the material before, during or after abstracting the air, and the water is heated to convert it into steam during the maintenance of the vacuum. A suitable temperature in the case of treating corn is from 30‹- 45‹ C. The material to be heated is stirred during the whole or part of the operation. The water, which is preferably freed from air before being added, is preferably preheated to a temperature of about 30‹ C.
Patent GB-1334347-A (GB)
Title: Electrostatic transducer
IPC: H04R19/00
Filed: 1972-06-12
Abstract: 1334347 Electrostatic transducers; earphones STANTON MAGNETICS Inc 12 June 1972 [19 Aug 1971] 27387/72 Heading H4J An electrostatic transducer comprises a diaphragm 36 (Fig. 3) secured to one face of a frame 24 having a central opening 26. A perforated plate 28 of conductive material coated with insulation is secured to the other face of the frame 24. Spacers 54, of foam rubber or foam plastics material having a foam rubber-like resilience, in the form of discrete clumps near the sides of the frame 24 (preferably near the corners) project into the opening 26. Electrical connections are provided to the diaphragm 36 and to the plate 28. The diaphragm 36 is preferably of polyethylene terephalate film having a vacuum deposited metal coating 38. The transducer is preferably of the push-pull type having a second plastics film 46 overlying the metal coating 38, a second frame 48 and a second perforated plate 50 provided with foam spacers 54 (see Fig. 4) in register with the first spacers 54 for uniformly supporting diaphragm 36 and film 46. The transducer may be used in a loudspeaker or earphones. The frames 24, 48 are formed from epoxy resin or glass fibre reinforced polyester film. The plates 28, 50 are of metal, coated with varnish or, preferably, are anodized. The diaphragm 36 is adhered to the frame 24 and is neither limp nor tightly stretched. Film 46 is similarly adhered to frame 48. Registering holes 52 receive screws or clips Earphones 10 (Fig. 1) comprise an adjustable strap 12 and earpieces 14. Each earpiece 14 includes a housing 16 in the form of a concave shell provided with a cushion 18. A transducer (20), Fig. 2 (not shown), within each housing 16 had leads fed through a universal joint 22 which also connects earpiece 14 to strap 12. The earphones are for stereophonic use. Local circuit.-Each earphone transducer is fed by a step-up transformer 56 (Fig. 5) having a secondary winding 58, the ends of which are connected to the plates 28 and 50. A centre tap 60 is fed through a polarizing voltage supply 62 to metal coating 38. The plate 28, which in use is close to the user's ear, is earthed.
Patent GB-1006120-A (GB)
Title: An improved electrophotographic method of producing lithographic masters
IPC: G03G13/28
Filed: 1961-07-28
Abstract: Copper, nickel or cobalt rubeanates are cathodically deposited from aqueous electrolytes containing soluble salts of the metals and an alcoholic solution of rubeanic acid.  If the deposit is made on a photoconductive zinc-oxide-in-resin layer A.C. or D.C. may be used. An iron-rubeanic acid complex compound may be cathodically deposited from a similar electrolyte containing ferrous chloride and rubeanic acid with an applied potential of 80 volts.
Patent GB-154526-A (GB)
Title: Improved compass sundial
IPC: G01C17/34
Filed: 1920-09-27
Abstract: 154,526. Cox, E. T. C. Sept. 27, 1920. Sun-dials.-Relates to compass sun-dials of the kind described in Specification 14858/15, and consists in substituting for the lens and mirror used in the prior construction a prismatic telescope m, pivotally mounted on a standard n fixed to the pointer e, that moves over the dial plate c. A slit o is provided in the underside of the telescope, so that the rays passing through the telescope are reflected on to the centre-line of the pointer e.
Patent GB-1415369-A (GB)
Title: Variable speed conveyor system
IPC: B66B21/12
Filed: 1973-06-08
Abstract: 1415369 Endless conveyers P PATIN 8 June 1973 [30 June 1972 13 Oct 1972] 27441/73 Heading B8A An endless conveyer system comprises a series of units each having a conveying element 11 mounted on a shaft 3 which, to vary the speed at which individual elements are propelled, is adjustably connected to adjacent shafts 3 by deformable loop members 1. Each shaft 3 has rollers 9a, 9b supported on rails 4a, 4b and, by varying the spacing between the rails 4 and lower rails 7a, 7b, the distances between adjacent shafts 3 is altered. The rails 7 guide wheeled members 6 which include pulleys 5 for maintaining tension on the loop members 1. In the region of maximum speed of the conveying units, i.e. where spacing between the rails 4-7 is a minimum, an endless belt 14 has projections 15 which drive the shafts 3.. The conveying elements 11 are capable of carrying people. In Figs. 4-5 (not shown) loop members (28, 29) and (38, 39) are disposed horizontally. In Fig. 6 (not shown) cabins (16a, 16b) are suspended from conveying units which function similarly to those in the Fig. 3 embodiment. Horizontal loop members (48, 49) may be in the form of a quadrilateral, Figs. 7, 8 (not shown). Fig. 9 indicates how overlap between adjacent loadsupporting plates 54 varies as the spacing between cross members (41) changes. In Fig. 10 covers 20 which may be gripped by standing passengers are attached to vertical conveying units and are driven at a speed preferably synchronized with that of the conveyer. The drive may comprise a linear induction motor.
Patent GB-1261119-A (GB)
Title: Optical objective of variable focal length
Inventor: COOK GORDON HENRY
IPC: G02B15/14
Filed: 1969-05-30
Abstract: 1,261,119. Variable focal length objective. RANK ORGANISATION Ltd. May 27, 1970 [May 30, 1969], No.27443/70. Addition to 1,167,373. Heading G2J. In a modification of the variable focal length objective disclosed in parent Specification and in addition the second member comprises two convergent compound components followed by a simple convergent component, the third member comprises a front simple divergent component and a rear compound divergent component, their separation being between 0À5f 3  and f 3 , and the fourth member comprises a compound convergent component followed by a simple convergent component. Optical data are given for three examples.
Patent GB-958113-A (GB)
Title: Improvements in or relating to spools for business machines
Inventor: CORSAN GEORGE WILLIAM
IPC: B41J33/00
Filed: 1959-08-11
Abstract: 958,113. Injection-moulding spools. WALTER GRAFTON & SON Ltd. Aug. 9, 1960 [Aug. 11, 1959], No. 27489/59. Heading B5A. [Also in Division B8] A spool for, e.g. typewriter ribbon, is produced in an injection mould comprising two parallel platens 30, 31 movable towards or away from one another, two core plates 33, 34 movable towards or away from one another and defining with said platens the flanges 11, 12 and the outer wall of the hub 10 of the spool, a central core member 38 movable normal to the plane of an operative face of a platen, and a pair of opposed cores 39, 40 movable towards or away from one another along the axis of said member 38 with their ends shaped so as together to define a chamber 41, 42 for moulding prongs 22, 23 extending circumferentially around the hub 10. The hub 10 has a central hole 13, an inner wall 14 joined by ribs 15, 16, 17 to outer wall sections 18, 19 which support the prongs 22, 23. The spool may have driving means such as lugs 27 or holes 28. Specification 958,112 is referred to.
Patent GB-1047725-A (GB)
Title: Fluid valve construction
Inventor: BREDTSCHNEIDER KURT BRUNO
IPC: F16K27/08
Filed: 1964-07-03
Abstract: 1,047,725. Valves. CRANE Ltd. July 3, 1964, No. 27565/64. Heading F2V. A valve comprises two yoke arms 12 extending from the valve bonnet to a yoke hub 17 through which passes the threaded valve spindle 7. A sleeve 19, having a flange 18, is retained in the hub and has a threaded portion 26 at its upper end engaged by the valve spindle. A handle 25 is received on a tapered polygonal portion 24 of the sleeve whereby the sleeve is rotated to actuate the valve. The handle is positioned immediately above the hub and the sleeve extends a substantial distance above the handle. The handle may be replaced by an adapter having lugs engageable with an electric motor driven gearing mechanism. The valve has a stuffing-box 14 and the distance a between the hub and bonnet is preferably not more than three times the diameter b of the stuffing-box. The valve may be wedge-shaped.