baber/WOPTO huggingface dataset:
Patent GB-1471764-A (GB)
Title: Process and elements for recording phase holograms
IPC: G03F7/00
Filed: 1974-03-21
Abstract: 1471764 Holograms and recording materials therefor J J A ROBILLARD 21 March 1974 [23 March 1973] 12646/74 Headings G2C and G2X Phase holograms are recorded in visible light by holographic exposure using a transparent support and a layer of transparent recording composition sensitized to the visible by a coloured sensitizer formed in situ from a transparent, photo-, thermo-, or electro-chromic compound and maintained during recording by uniform exposure to ultraviolet, heat or an electric field and then after recording is returned to its transparent state by termination of the exposure leaving a transparent holographic recording in terms of variations of refractive index. Specified compounds are benzothiazoline and indoline spiropyrens, anils, pyrylium oxides, sydnones, methyl-inologen and diaryl di-methane dye derivatives. The recording composition is preferably (1) a polymerisable composition containing polyvinyl alcohol, acrylamide and triethanolamine, or acrylamide, N, N'-methylenebisacrylamide and potassium ferricyanide, (2) polymethylmethacrylate, (3) vinyl pyrrolidase/ethyl acrylate copolymer and benzotriazole and (4) glycol styryl acrylate and alpha-methylbutyl lithium. Other polymerisable compositions, N-vinyl carbazole/carbon tetrachloride and compositions of French Specification 2109431 may also be used as the recording composition.
Patent GB-1211475-A (GB)
Title: Optical illumination system for photographic colour printing apparatus
IPC: G03B27/73
Filed: 1968-03-15
Abstract: 1,211,475. Colour photo-copying apparatus; colour filters. AGFA GEVAERT A.G. March 15, 1968 [March 31, 1967], No.12770/68. Headings G2A and G2J. An optical system for illuminating an original in a photographic colour printing apparatus includes a prism 4 made of heat resistant glass with highly polished lateral faces and spaced from a further prism 9 having a diffusing disc 8 at its light entry surface. The prism 9 acts as a colour mixing member, additive or subtractive colour filters 5a, 5b, 5c being wholly or partially insertable into the space between the prisms 4, 9. Light from a lamp 1 passes into the prism 4 through a heat protection filter 2 and a diffusing disc 3. Between the filters 5a, b, c, and the prism 9 is arranged a further prism 6 having on end 7 silvered to reflect coloured light into the prism 9. The uniformy coloured beam emerges from the prism 9 through a diffuser 10 and falls on the aperture of a negative mask 13 after passing through an adjustable diffusing disc 11 and a condenser 12. The filters may be arranged to form a square configuration Fig.2 (not shown).
Patent GB-1168212-A (GB)
Title: Improvements in or relating to Automatic Gain Control Amplifiers
Inventor: KERTSEN HANS
IPC: H03G7/06
Filed: 1968-03-18
Abstract: 1,168,212. Automatic gain control. H. KERSTEN. 15 March, 1968 [18 March, 1967], No. 12790/68. Heading H3T. In an automatic gain control amplifier for recording and/or reproducing sound, and more particularly a limiter or compressor, having a recovery time constant which has, at the start of the recovery an average value of about 0.5 to 1.0 seconds, irrespective of the control deviation, this recovery constant is switched, after the lapse of a delay time equal to at least one half, but preferably to a whole cycle of the lowest audio frequency to be transmitted automatically to a lower value of about 0À1 seconds. Transformer 1, Fig. 1, feeds signal to two centre-tapped secondary windings one of which supplies voltage E s1  to a full-wave peak rectifier comprising diodes 2, 3 and transistor 6, the emitter circuit of which includes a long time-constant circuit comprising resistor 9 and capacitor 8, across which a positive control voltage is produced. The second transformer secondary supplies voltage E s2  to a full-wave peak rectifier comprising diodes 4, 5 and transistor 7, the emitter circuit of which includes a short time-constant circuit comprising resistor 11 and capacitor 10 across which a negative control voltage is produced. The voltage across capacitor 8 is applied to the control member 12 of the automatic gain control amplifier, while the voltages across capacitors 8, 10 are combined in a resistive adding network 20, 21 and applied to the base of a transistor 22. Transistor 22 is normally biased non-conductive by an emitter bias network comprising resistor 25, diode 24 and capacitor 26. The outputs across capacitors 8, 10 from the two rectifying circuits, or alternatively the values of the resistors 20, 21 are so proportioned that with automatic gain control in action the voltage from capacitor 10 preponderates at the base of transistor 22, etaining it cut off. When the signal ceases the voltage across capacitor 10 falls more rapidly than that across capacitor 8, so that after a predetermined time interval the voltage from capacitor 8 preponderates at the base of transistor 22, biasing it positively. Transistor 22 then becomes conductive and shunts resistor 23 in parallel with resistor 9, giving the gain control characteristic beyond this point a short time-constant. The resistors 9, 11 may be omitted, discharge of the capacitors 8, 10 taking place through the resistors 20, 21 alone. A slow-access storage member, comprising series-connected capacitance and resistance may be connected in shunt with the capacitor 8 (Fig. 4a, not shown), it may be isolated from that capacitor by means of an interposed amplifier, being arranged to discharge through a shunting resistor (32, Fig. 4b, not shown). In order that the whole of the voltage across this additional capacitor 29, Fig. 4c, may be available across the resistor 32 during discharge, the resistor 28 may be shunted by a diode 33 poled so as to be non-conductive during the charging process.
Patent GB-807547-A (GB)
Title: Improvements in and relating to rubber springs
Inventor: MOULTON ALEXANDER ERIC
IPC: F16F1/40
Filed: 1955-05-03
Abstract: 807,547. Rubber Springs. MOULTON & CO. Ltd. May 3, 1956 [May 3, 1955], No. 12807/55. Class 108(3) The invention relates to a rubber compression spring arrangement comprising an annular rubber ring or plurality of concentric rings 1, bonded on one radial face (or set of faces) to a metal plate 17 which extends (if at all), only outwardly beyond the rubber, the other annular face of the ring 1 being bonded to a metal plate 19 which extends inwardly of the rubber. According to the invention, the plate 19 has riveted, spot welded, or otherwise attached to it, an annular spigot 20 which is adapted to engage with the plate 17 of the succeeding ring 1 (not shown). The spigot 20 is formed from the material cut away in making the central aperture of the plate 17. The outer periphery of the ring 17 has a spigot 18 in which is disposed the plate 19 of the next adjacent ring 1 above. In a modification (Fig. 2, not shown), the ring 17 does not extend radially outward of the ring 1, and the spigots 18 and 20 are both disposed on the plate 19 (which extends both inwardly and outwardly of the ring 1). The ring 1 may be either oval or circular when viewed in plan. Specification 737,912 is referred to.
Patent GB-765795-A (GB)
Title: Push-button electric switches
Inventor: BOURNE WILLIAM GEORGE
IPC: F24F13/06
Filed: 1954-05-04
Abstract: 765,795. Push-button retractive switches. ROTAX, Ltd. April 19, 1955 [May 4, 1954], No. 12905/54. Class 38(5) A'switch has a centrally-pivoted contact arm i adapted normally to co-operate with the right-hand fixed contact c, depression of a push button m closing the left-hand contacts and opening the right-hand contacts release of the button restoring the contacts under the action of a spring a, the button acting on a lever r connected with a lever s acting on the arm i. The latter is pivoted on a pin h and is acted on by rollers y on a pin x carried by lever s and passing through holes in lever r. The latter is pivoted at t and is engaged by a pin p carried by the button m, the pin p being guided by fixed slots q and passing through curved slots w in lever s.
Patent GB-422613-A (GB)
Title: Methods of and means for separation and sorting
IPC: G07D5/08
Filed: 1934-04-30
Abstract: 422,613. Testing and separating coins. BRAUN, T., 18, Viktorgasse, and VOGT, W., 15, Hasengasse, both in Vienna. April 30, 1934, No. 12998. Convention date, May 2, 1933. [Class 27] [See also Group II] Coins or metal discs 4 inserted in a shoot I come to a standstill in an offset portion and roll down a slope 2<a> so that they enter a vertical shoot 3 with a velocity solely depending on theii weight. At the bottom of the shoot 3 the coins pass through a magnetic field caused by the poles 5 of a magnet m, and impinge on a blade spring 7 from which they rebound into and then out of the magnetic field. The braking effect of eddy currents generated in the coins cause them to follow different trajectories 10, 11, according to their composition, so that they drop into different receptacles and are thus separated.
Patent GB-131132-A (GB)
Title: Improvements in and relating to Corset Holders.
Inventor: SMITH SARAH ELIZABETH
IPC: A41F1/04
Filed: 1918-08-12
Abstract: 131,132. Smith, S. E., and Smith, R. A. Aug. 12, 1918. Corsets.-To enable shop assistants and others to lace up corsets easily, quickly, and accurately, a stand or holder is provided which supports the corset in convenient and adjustable position for lacing the two edges together. This stand consists of a base and end supports. The base is formed of two telescopic parts 8, 9, adjustably secured together by a stud and wing-nut 19 slidable in a slot 16. The ends of the base are curved as at 10 to engage the table, counter, &c. 5. Near each end is adjustably fixed, by means of a headed stud and wing-nut 33 slidable in a slot 31, a flat rectangular metal frame 7, at the top of which near each corner is removably and adjustably attached, by means of a nut slidable in a slot, a spring clip 21, which can be caused to grip the edge of the corset securely by a screw 26. The base is provided with projections or feet 11, the studs thereon with heads 18, 32, and the end frames with rolled-over edges, so as to support the base at the desired height above the counter, &c. The parts of the holder can be disassembled easily for packing &c.
Patent GB-831550-A (GB)
Title: Improvements in or relating to packaging containers
IPC: B65D73/00
Filed: 1957-04-25
Abstract: 831,550. Packages; cartons. GOODALL & CO. Ltd., R. A., and HUNT, P. H. April 25, 1958 [April 25, 1957], No. 13129/57. Classes 18 and 94(1). A dished and flanged holder 2 of transparent plastic is mounted in an aperture 7 in a sheet of cardboard 1 creased at 8 and 9 to provide a longer flap 11 having a slit 14, a panel 10 and a shorter flap 12 which tapers towards its free end. When the holder 2 is loaded, the flap 11 is doubled over at the crease 8, its length being such as to span only part of the holder, the remaining part being obturated by a hinged tongue 13 ; the flap 12 is then doubled over its crease 9 and its free end inserted in the slit 14. Adhesive bands 15, 16 secure the flaps 11 and 12 to the panel 10.
Patent GB-131962-A (GB)
IPC: B64F1/34
Abstract: 131,962. Thomas, G. H., and Hucks, B. C. June 28, 1918. Addition to 130,019. Turning-gear.-The parent Specification describes an aeroplane engine starter mounted on a motor-car and comprising a shaft 25 adapted to be coupled to an aeroplane propeller and driven from the car engine through a clutch, a sprocket-chain drive, and a universal joint. According to the present invention, the clutch for coupling to the aeroplane propeller is carried by a telescopic extension 33 splined to the shaft 25 so as to be in constant driving-connexion with it, the extension being normally withdrawn by a spring 49. The clutch comprises a gimbal ring 35 pivoted on trunnions 36 in the forked end of the extension 33 and having a cross-pin 38 for engagement with undercut notches 39 in a clutchmember 40 on the propeller hub. The member 40 is preferably carried by a spider frame 44 bolted to the hub 16. When the aeroplane engine starts, the pin 38 leaves the notches 39 and the extension 33 is retracted by the spring 49.
Patent GB-779600-A (GB)
Title: Improvements in heat exchangers
Inventor: PARRIS CYRIL WRIGHT
IPC: F28F1/12
Filed: 1953-05-12
Abstract: 779,600. Tubular heat exchangers. GREEN & SON, Ltd., E. Sept. 28, 1953 [May 12, 1953], No. 13208/53. Class 64(3) In a heat exchanger in which parallel tubes extend across a hot fluid passage and are arranged in staggered rows such that the tubes in alternate rows are aligned, in the direction of fluid flow thereover, with spaces through which the hot fluid flows between the tubes of the other rows, external longitudinal ribs extend from each tube in the direction of flow of the fluid but do not extend into the spaces between the tubes of adjacent rows, and the contours of the rib surfaces 5 which join the outer edges 4 of the ribs to the tube body 1 are shaped as transition curves preferably of lemniscate or equiangular spiral form, thus avoiding sudden changes in direction of flow of the fluid as it passes over the tubes. In the form shown, transverse fins or gills 2 are provided on the tubes. Specification 492,108 is referred to.
Patent GB-131423-A (GB)
Title: Improvements in Pneumatic and other Elastic Tyres for Motor and other Vehicles.
Inventor: DUNN THOMAS
IPC: B60C27/16
Filed: 1918-08-15
Abstract: 131,423. Dunn, T. Aug. 15, 1918. Addition to 117,093. Tread bands. projections, and surfaces; jackets and covers; tyre attachments to rims.- A pneumatic tyre cover for heavy vehicles adapted for use with treads such as are described in the parent Specification comprises one or two fabric layers f, f<1> formed of transverse threads only, as by winding in the manner described in Specification 6585/11, with or without a liner f<2> of cotton stockinette or like material. The tyre shown has two air-tubes o, p, the latter having an inextensible sleeve q, as described in Specification 6585/11. The attaching-devices comprise a transversely-split baseband b (with a fabric facing c) adapted to fit an ordinary wheel rim a. Similarly-divided steel bands j are fitted in pockets h in the edges of the cover, and a wide band k, having rubber edges n and faced with fabric l, is arranged inside the cover as shown. The bands b, k carry rings d, m respectively which fit between fit between the tyre edges. In use, the tyre edges are secured to the bands b, k by raw-rubber solution, the band b being then fitted over the wheel rim in the manner of an ordinary band tyre. The tyre is secured by inflation, but for additional security, screws may be passed through the band b into the rim a. Rubber fillets r are fitted to the sides of the cover, the tread proper comprising rubber bands or blocks v on circumferentially-inextensible wire bases u. Strips t<1> - - - t<9> of wire gauze, proofed holland or other bias fabric, or isolated thread fabric cut transversely, are fitted under the bands u and folded up the sides, or embedded in the tread rings or blocks. A fabric band s, formed of transverse threads, is disposed between the tread and the cover. The valve preferably passes between the ends of band k, and may be fitted with a plate carrying studs to enter holes near the ends of the band. Non-metallic elastic bodies.-Fig. 2 shows a solid tyre having wire-gauze strips t<10>, t", t<12> fitted under thin metal bands w embedded near the tyre base. Such tyres mav be made of more elastic material than ordinary band tyres.
Patent GB-1269313-A (GB)
Title: Broaching tool
Inventor: ROSAN JOSE SR
IPC: B23D13/00
Filed: 1970-03-19
Abstract: 1,269,313. Broaches. ROSAN ENG. CORP. and J. ROSAN. 19 March, 1970 [21 March, 1969], No. 13289/70. Heading B3L. A broaching tool comprises a mandrel 20 extending through a hollow body 16 and a pin- and-slot engagement 19, 26 to prevent relative rotational movement but allow relative axial movement. A broaching cutter 32 having axially extending teeth 33 is located between a pilot 27 screwed into the mandrel 20 and an end face 21 of the mandrel, the pilot being concentric with the mandrel. A nut 36 is screwed on to a threaded portion 22 of the mandrel to engage the end of the body 16, rotation of the nut causing a rearward axial retracting movement of the mandrel relative to the body. In operation the head 30 of the pilot 27 is guided into a bore to be broached, the end face 38 of the body 16 is engaged with the workpiece, and the cutter 32 is then driven into the workpiece by applying a force to the end of the mandrel 20. A required depth of broach is determined by the engagement of a flange 25 with a shoulder 18. To release the cutter 32 from the bore of the workpiece the nut 36 is rotated to retract the mandrel. The cutter 32 is loosely held on the pilot 27 between end face 21 and a shoulder 29.
Patent GB-773100-A (GB)
Title: Stroke varying device for mechanical presses and like machines
IPC: B30B1/26
Filed: 1955-05-09
Abstract: 773,100. Eccentrics. ETABLISSEMENTS GRIMAR. May 9, 1955 [Nov. 4, 1954], No. 13346/55. Class 122 (1). [Also in Group XXIV] In a variable-throw crank mechanism, particularly for presses, of the type wherein the connecting-rod B embraces an eccentricallybored sleeve 2 which is rotatably adjustable on an eccentric boss la of a driving-shaft 1, the sleeve 2 is locked to the boss la by teeth 3, which are disengaged by sliding the sleeve 2 axially, the sleeve 2 being coupled to a sleeve 12 extending through one of the shaft bearings P1 and actuated at its outer end so that the eccentric sleeve 2 may be axially disengaged, rotatably adjusted and subsequently re-engaged without having direct access thereto. The boss 1a is of " cylindro-conical " shape. A ring 5 attached to the sleeve 2 limits its axial movement to the left. The sleeves 2, 12 are rotatably coupled by a pin 9 engaging a slot in a plate 7 integral with the sleeve 12, the plate 7 being held between the sleeve 2 and a plate 10 attached thereto. The outer end of the sleeve 12 may be actuated by any means but as shown has an inturned shoulder held between a collar and a ring on a bush 13 which is threaded on the shaft 1 so that the sleeves 2, 12 are axially moved to disengage the teeth 3 by rotating the bush 13 by a key 17. The sleeve 2 is then rotatably adjusted by a key 20 inserted in a ring attached to the sleeve 12. A scale 21 on the ring indicates, against a fixed pointer 22, the selected length of stroke. Stops may be provided to hold the connecting-rod B in place during axial movement of the sleeve 2. In a modification dispensing with the teeth 3 the end faces of the sleeve 2 and boss 1a have corresponding radial slots which are coupled by projections extending from a plate on the sleeve 12, the slots in the sleeve 2 being deeper than those in the boss la so that the sleeve 12 may be axially disengaged from the boss 1a and then turned to rotatably adjust the sleeve 2.
Patent GB-1385358-A (GB)
Title: Apparatus for the biological purification of waste water
IPC: C02F3/18
Filed: 1972-03-22
Abstract: 1385358 Aerating agitating and circulating liquids GIREJAN 22 March 1972 [22 March 1971 15 Dec 1971] 13348/72 Heading B1C Apparatus for aerating water comprises a circulation channel 1 with a surface aerating rotor 3 having impeller blades 9 arranged in at least one helical path around it. The waterimpelling part of each block is transverse to the helix and the blades on each helix are closer to each other than to those on the next helix or turn of the same helix. The rotor may be parallel or angled to the flow path in the channel. As shown in Fig. 1 the helix has two starts; the blades may be separate or mounted on or integral with a helical strip (see Figs. 6-9, not shown). The rotor may be located in a venturi flame 10; in other arrangements there may be more than one rotor arranged in parallel or tandem (see Figs. 4 and 5, not shown). The rotor may be driven by a motor 6; or supported by floats and/or located by the currents of e.g. a river (see Fig. 15, not shown). In arrangements in which the rotor axis makes an acute angle with the flow path, the blades may be mounted on a continuous screw flight (18, Fig. 11, not shown) and the blades and helix angles arranged to produce a resultant thrust in the general direction of flow through the apparatus. Angled rotors may be mounted on a central wall 19, the blades being arranged in heelices of the same hand driven in opposite senses, or of opposite hand and driven in the same sense.
Patent GB-1199825-A (GB)
Title: Improvements relating to Packaging
IPC: C08L9/00
Filed: 1968-03-20
Abstract: 1,199,825. Packaged rubber compounding ingredients. DUNLOP CO. Ltd. 20 March, 1968 [25 March, 1967], No. 13415/68. Heading C3E. Compounding ingredients for rubber in predetermined quantities are packaged in a material produced from a composition which comprises a major proportion of at least one trans-polydiene. Suitably the polymer is transpolybutadiene or trans-polyisoprene.
Patent GB-134642-A (GB)
IPC: B64C11/22
Abstract: 134,642. Watts, H. C. Nov. 20, 1918. Screw propellers. - Relates to two-bladed wooden propellers for aircraft. The two blades are composed mainly of two planks P, P<1>, Fig. 4, which are joined together endways at the hub on an angle. Each plank is provided at the end with an inclined slot, and they are fitted together so that the inner ends of the slots abut. The planks are inclined at such an angle that as much of the blades as possible is cut from the planks only, and the overlapping parts are filled up with laminµ or packing-pieces 1 - - 9 extending outwards as far as is necessary to enable the proper form of the blades to be obtained. The planks and filling-pieces are shaped as much as possible before glueing together, as shown in sections in Figs. 5 and 7. The planks and laminµ may be glued together on a former of such a shape that they set with a permanent twist, so that the outer parts of the pitch faces of the blades are formed without cutting. The planks may be in one piece, or may be built up of plywood as shown in Fig. 4, in which the grains of the wood in adjacent laminµ are inclined to one another, e.g. parallel to the length of the plank, inclined at 20-90 degrees parallel to the length, inclined at 20-90 degrees in opposite direction, and so on, in succession.
Patent GB-621749-A (GB)
Title: Improvements in and relating to catalysts and their use
IPC: B01J25/00
Filed: 1946-05-03
Abstract: A copper-containing catalyst is prepared by treating a copper aluminium alloy containing copper and aluminium in the relative proportions by weight respectively of from 40 : 60 to 75 : 25 with an aqueous alkaline solution, other than of an alkali metal sulphide or polysulphide, so as to remove a portion at least of the aluminium from the surface layers.  The alkaline solution is preferably that of an alkali metal hydroxide or carbonate.  The alloy is preferably a fine-grained one prepared by chill casting, and is crushed and graded (the grading preferably being 1/8 -\ba1/4 inch) before the treatment. 1 per cent to 70 per cent of the aluminium may be removed by the treatment.  It is preferable to increase the concentration of the alkali solution as the treatment proceeds.  The catalyst may be used in the alkalised form or, alternatively, may be washed with water until free from alkali.ALSO:1,-5 Pentanediol is prepared by the reaction of dihydropyran with hydrogen and water in an autoclave at 200 DEG  C. and pressures ranging from 250-150 atmospheres in the presence of a granular foraminate copper catalyst prepared by treating a granular copper-aluminium alloy with aqueous sodium hydroxide to remove a proportion of the aluminium.  Acetone is prepared by passing iso-propanol vapour through the glass tube of an electric tubular furnace heated to 300 DEG  C., which is charged with a copper catalyst prepared by treating a granular copper-aluminium alloy with aqueous sodium hydroxide to remove a proportion of the aluminium, preferably followed by washing with water to remove the alkali.