baber/WOPTO huggingface dataset:
Patent GB-1475511-A (GB)
Title: Photographic camera
IPC: G03B13/12
Filed: 1974-06-13
Abstract: 1475511 Cameras EASTMAN KODAK CO 13 June 1974 [14 June 1973] 26268/74 Heading G2A  A camera has two lenses 18, 22, each of which can be moved into or out of alignment with the optical axis by means of an actuating member, the movement of said member also serving as a focus adjustment for one of the lenses. As shown, lens 18 is a standard fixed focus lens, and is mounted in a carrier 12 which is slidable in a direction parallel to the film plane 16. A further carrier 14, similarly slidable, has mounted therein a telephoto lens 22. An arm 36 of carrier 12 extends into a recess 34 in carrier 14. The carrier slides are actuated by a slider plate 42, which has at its left hand end a toothed lug 46 engaging with a toothed collar 26 forming part of the threaded mount 20 of lens 22. Two openings 62, 64 are formed in the top of the camera, and a plate 66 below slider plate 42 carries the words "STANDARD" and "TELE" which are aligned with these openings. Plate 42 blocks off one or other of these words according to its position. Fig. 1 shows the "STANDARD" position in which lens 18 is in the operative position. Slider plate 42 has a corrugated lug 58 extending through a slot 60, for ease of manipulation. To change over to the other lens, plate 42 is slid to the right. The first part of this movement is taken up by rotation of collar 26, after which carrier 14 engages arm 36 of carrier 12, and both carriers are moved together to the "TELE" position of Fig. 3 (not shown), in which the telephoto lens 22 comes into the operative position. In this position plate 42 has a limited amount of back-and-forth movement which is translated into axial focusing movement of lens 22. The other end of plate 42 has a cam slot 50 which engages a pin 54 on a movable element 52 of the view-finder system, in order to adapt the size of the view-finder image to the telephoto lens. A lug 32 on carrier 14 blocks the shutter release 38 except when one lens or the other is aligned with the optical axis, and an intermediate position is also indicated by a warning pointer 56 which is visible in the view-finder.
Patent GB-733976-A (GB)
Title: Improvements in or relating to demodulators for electric carrier current communication systems
Inventor: HARGREAVES THOMAS FREDERICK ST
IPC: H04J1/14
Filed: 1953-09-24
Abstract: 733,976. Valve circuits for radio reception. STANDARD TELEPHONES & CABLES, Ltd. Sept. 24, 1953, No. 26300/53. Classes 40 (5) and 40 (6). A non-linear resistor is utilized to maintain constant the signal level at a detector. In a reflex circuit, Fig. 1, carrier waves amplitude modulated with speech and also with a pilot tone are applied to the grid of a valve 4 via a resistor 3. They are selected from the anode circuit by a tuned transformer 9 and applied to a bridge rectifier 29, from which the modulation components are returned to the grid of valve 4 via a level control 30 and R.C. network 33, 36, 34. After re-amplification in the valve, the pilot tone is selected from the anode circuit by means of a tuned transformer 11, while the speech signals are obtained from resistor 13 and via a low-pass filter 16. In order to render the output level constant, the secondary of the transformer 9 is loaded by a directly heated thermistor 25 in series with a fixed resistor 26. In another arrangement, Fig. 3, the valve 38 comprises an anode-bend detector having an anode circuit similar to that shown in Fig. 1, but differing in that the secondary of the carrier-frequency transformer 9 is now connected, via a directly-heated thermistor 25 and series resistor 26, to a tuned circuit 39 in the cathode path of the valve 38. In this way variable negative feed-back is provided at carrier frequency, so as to reduce variations in output level. In a modification, Fig. 4 (not shown), the primary of the transformer 9 is coupled to the tuned cathode circuit 39 via a series acceptor circuit, and the secondary of transformer 9 is shunted with the thermistor and series resistor so as to vary the degree of positive feed-back so produced. The valve used in the arrangements of Figs. 3, 4 may alternatively comprise a leaky-grid detector.
Patent GB-1530693-A (GB)
Title: Fuel control systems for gas turbine engines
IPC: F02C9/28
Filed: 1976-06-24
Abstract: 1530693 Gas turbine engine fuel systems ROLLS-ROYCE Ltd 10 June 1977 [24 June 1976] 26317/76 Heading F1G An aircraft gas turbine engine has a fuel system with means for switching from a first mode of operation in which the net engine thrust increases in response to an increase in aircraft speed to a second mode in which the net thrust decreases in response to an increase in aircraft speed. In the first mode, below engine cruise, the fuel flow regulator 42 receives via valve 44 an engine intake pressure signal P I  and operates to maintain the ratio of compressor outlet pressure PHP to PI constant for a given throttle setting. At cruise, valve 44 is switched so that regulator 42 receives from unit 46 a signal derived from atmospheric pressure P O  times a constant K and operates in the second mode to maintain the ratio of PHP to KP O  constant. Valve 44 may be a "lowest wins" device, or may be controlled manually by pilot's switch 50 or automatically by aircraft speed sensor 36. Control pressures other than PHP are specified.
Patent GB-868097-A (GB)
Title: Improvements relating to metal pound boards
Inventor: BARTLETT THOMAS HENRY
IPC: B63B35/24
Filed: 1958-08-15
Abstract: 868,097. Pound boards. IMPERIAL CHEMICAL INDUSTRIES Ltd. Aug. 24, 1959 [Aug. 15, 1958], No. 26320/58. Class 113. In a pound board the overall thickness of the ends are increased by the provision of the dimples 8, 8<SP>1</SP>. The dimples may be formed on one side of the board only and the number of channels 1, 2 and 3 may be varied as required.
Patent GB-164650-A (GB)
Title: Improvements in liquid fuel furnaces
IPC: F23D11/00
Filed: 1920-09-15
Abstract: 164,650. McKean, J. G., and Jones, R. F. Sept. 15, 1920. Liquid-fuel furnaces.-The furnace front described in Specification 154,124 is modified by bolting the covering-plates a, j directly to the. front plate b of the furnace to form an air space e to which air in regulated quantities is supplied from the hollow front above and below the firing- hole i. A valve g controls the admission of air to ports f communicating with the space e and to ports h leading into the firing-hole i. Valves are also provided at the sides of the dead-plate for controlling the admission of air to the space beneath. Ribs o are provided on the covering- plates a, j to direct the air over the plates for cooling purposes, and ribs n direct the air tangentially through the opening m leading to the furnace.
Patent GB-218898-A (GB)
Title: Improvements in and relating to coke ovens
IPC: C10B21/12
Filed: 1923-10-24
Abstract: 218,898. Wilputte, L. Oct. 24, 1923. Gaseous-fuel fittings.-In a vertical-fiued coke oven having horizontal gas supply channels G arranged adjacent the lower ends of the heating- flues C and extending into the structure from the ends of the heating-walls, the outer end of each channel G is fitted with a metallic liner K, having ports K<1> adapted to register with the adjacent brickwork ports H. This liner prevents leakage of gas at that portion of the structure where, owing to temperature changes, the joints are most like to open. The outer end of the liner is enlarged to take an internal thread for the supply pipe M, and the passage in the brickwork is made large enough to accommodate a cement or mortar filling L around the liner.
Patent GB-267833-A (GB)
Title: Improvements in and relating to rotary stropping, grinding and honing devices
IPC: B24D15/08
Filed: 1926-10-25
Abstract: 267,833. Watt, J. A. D. Oct. 25, 1926. Stroppinp - apparatus. - In rotary stropping, grinding, honing &c. apparatus for razors &c. having a positively driven roller with a hard recessed sharpening- surface and a comparatively soft resilient roller pressing the blade against the sharpening-roller, the surface of the soft roller is made up of a number of separate surfaces to enter the recesses in the hard roller. The hard surfaced roller 10 has, in the construction shown, helical grooves 11, and the resilient roller 13 is formed with its surface in a number of independent portions 14, of helical shape formed by moulding, cutting or winding on separate parts; the roller may have a resilient core with a covering of soft leather, or ribbed canvas, &c. The separate surfaces may be of square circular or other shape and may extend longitudinally, circumferentially or otherwise.
Patent GB-944600-A (GB)
Title: Improvements in and relating to reservoirs of writing and other dispensing instruments
Inventor: FEHLING HANS REINHARD
IPC: B43K7/035
Filed: 1960-07-30
Abstract: 944,600. Reservoir pens. I.R.C. Ltd. July 11, 1961 [July 30, 1960], No. 26625/61. Heading B6P. [Also in Divisions A5 and B2] A ball-point pen reservoir is of the kind having sealing means for a vented bore occupied by a liquid column, the sealing means comprising a solid follower at the rear end of the column, the follower being a sliding fit in the bore so as to move along it as the liquid is discharged from the reservoir. As shown, the reservoir 10, Fig. 1, contains a column of liquid 11 sealed by a follower 12. The follower 12 which may be formed of two moulded parts has a reduced diameter portion 13 forming an annular gas chamber 14 between portions 15, 16 having sealing regions d 1 , d 4  containing the reservoir liquid 11 and sealing liquid 19 respectively. A reduced diameter portion 18 provides a capillary expansion duct 17 communicating with the gas chamber 14. The front end 20 of the follower is domed or coned to obviate air being trapped between the follower and the liquid upon introduction of the follower. The trapped air in the chamber 14 may contract so that the expansion duct 17 is occupied by the sealing liquid, Fig. 2 (not shown) or the duct is only partly filled with sealing liquid, Fig. 3 (not shown). Slots 21, Fig. 1, of capillary size radiating from a hole 22 form a reservoir for the liquid 19. In a modification, Fig. 4 (not shown), the portion 18 is tapered, thus dispensing with a step at the sealing region of portion 16, Fig. 1. In a modification the expansion duct 17, Fig. 5, is formed by flutes 23 formed longitudinally of the part 18 leading to the gas chamber 14. In another embodiment, Fig. 6 (not shown), the duct 17 is formed by a capillary bore 24 connecting the chamber 14 with the sealing liquid reservoir 21, 21. Instead of the expansion duct 17 being directed outwards as described with reference to Figs. 1 to 6 the duct may be directed inwards as shown in Fig. 7, the duct 17a in this case being annular and surrounding a reduced portion 18a of the follower so as to communicate between the chamber 14 and the portion 15. The portion 15 has a corner at the reduction in cross-section to the portion 18a to anchor the meniscus of the liquid occupying the sealing region dl. In another embodiment, Fig. 8 (not shown), similar to Fig. 5, the follower is made, e.g. by injection moulding in two parts secured together by adhesive. In another embodiment, Fig. 9 (not shown), the expansion duct is a bore 24c leading from the chamber 14 to the front face of the portion 15c.
Patent GB-313820-A (GB)
Title: Improvements in sleeve valve engines
IPC: F01L5/06
Filed: 1928-09-17
Abstract: 313,820. Arrol-Johnston & Aster Engineering Co., Ltd., and Clench, C. Sept. 17, 1928. Cylinders. - The cylinders of internal-combustion or other fluid-pressure engines of the sleeve-valve type are made of an alloy of aluminium having a coefficient of contraction during the change from liquid to solid, substantially equal to that of cast iron. The alloy may contain, for example, 8 to 17 per cent of silicon.
Patent GB-234435-A (GB)
Title: Improvements in thermionic tubes
IPC: H01J1/14
Filed: 1924-11-11
Abstract: 234,435. Deutsche Gl³hfadenfabrik R. Kurtz und Dr. Ing. P. Schwarzkopf Ges., and Schwarzkopf, P. May 21, 1924, [Convention date]. Vacuum tubes.-A filament or other cathode consists of molybdenum and thorium either wholly or mainly metallic, the cathode having high electron-emissivity without the usual heat treatment for producing a surface layer of thorium. Thorium with or without a compound such as thoria is dissolved in, or intimately mixed with, molybdenum, the thorium content varying from 0.75 to 10 per cent. Thefilament is prepared by reducing in hydrogen a mixture of molybdic acid with thorium oxide or nitrate, to obtain a powdered mixture of molybdenum with unreduced thoria. The powder is farmed by pressure into bars which are sintered at about 2000‹ C. and drawn by the usual process. Part of the thorium oxide is reduced by molybdenum. Alternatively, filaments may be fomied by a squirting process. The crystalline structure of specimens containing different quantities of thorium is described.
Patent GB-845165-A (GB)
Title: Improvements relating to the manufacture of hydraulic turbo converters and to power transmission systems which include them
IPC: F16H47/07
Filed: 1958-08-21
Abstract: 845,165. Milling, VOITH G.m.b.H., J. M. Aug. 21, 1958, No. 26960/58. Class 83 (3). [Also in Groups XXIV and XXIX] Alternator blades 33a of the runner of a torque converter, [Group XXIX], are milled from the solid material of the runner disc 30, and the other blades 33b milled from the solid material of the runner ring 31, thus enabling milling cutters to be used which are larger than the final spaces x between the blades. The two parts are secured together by rivets 35, 36 turned on the blade ends.
Patent GB-1006621-A (GB)
Title: Electrical connectors
IPC: H01R4/24
Filed: 1963-07-08
Abstract: 1,006,621. Sleeve couplings. UNITEDCARR Inc. July 8, 1963 [July 13, 1962,] No. 26981/63. Heading H2E. An electrical connector comprises a body rolled from a sheet metal blank, defining openings, one at each end, for receiving insulated wires, and being formed with two sets of cutting edges 26 and 30, the spacing between the edges 30, being a little less than the diameter of the core of the wire. Each wire is inserted from one end and then drawn upwards against edges 26, and folded back on itself so that it is drawn into the slot defined by edges 30. During this process the edges cut through the insulation and make contact with the core. An insulated sleeve can be fitted round the connector. In a modification, Figs. 5, 6 and 7 (not shown), the connector is formed at one end as described above, and the other end is formed as a U-shaped trough which is crimped about the bared end of a second wire.
Patent GB-172163-A (GB)
Title: Improvements in or relating to automobile seats
IPC: B60N2/14
Filed: 1920-09-22
Abstract: 172,163. Martinsyde, Ltd., and Martin, H. P. Sept. 22, 1920. Revolving and sliding seats; seat adjustments. -A swivelling seat for automobiles &c. is mounted on a plurality of castors b and is adapted to be maintained in position by, and to pivot about disengageable pawls such as h, all except one of the pawls being disengaged when the seat is swivelled. Fig. 3 is a plan view of a disengaging mechanism employed in connection with two pawls. Two bell-cranks d mounted on the back-rest and provided with operating handles c are connected together by a wire tie o and bear on spring-pressed sliding rods e, the lower ends of which are pivoted to levers f mounted on the underside of the seat a and carrying the pawls h. The castors b run on arcuate rails j, k. The rails j have each a hole for the reception of the pawls h, and other holes may be provided to allow the seat to be locked further back to accommodate a larger person than the ordinary. The centre of the seat carries a block l provided with a plate m. Two arcuate guides n mounted on the floor and provided with projecting rims engage one or both ends of the plate m in all positions and prevent jolting &c.
Patent GB-987424-A (GB)
Title: Electric switch
Inventor: HEATH CLARENCE WILLANS
IPC: H01H23/16
Filed: 1962-07-13
Abstract: 987,424. Retractive switches. CARR FASTENER CO. Ltd. April 23, 1963 [July 13, 1962], No. 27088/62. Heading H2B. In an electric switch, energy is stored up in an actuating element consisting of arm portions 16, 18 connected by a resilient " C " shaped portion 19 when a pivoted operating lever 15 is depressed towards the switch cover 10 until it reaches a predetermined position when the energy is released, arm portion 16 pivots about a fulcrum 8a and snaps contact 17 into engagement with fixed contact 2. At the same time the arm portion 16 engages a plate 20, pivoted at fulcrum 8a, and opens contacts 21 and 3. The metal cover 10 has integral resilient tongues 11 shaped for snapping engagement in an aperture in a support.
Patent GB-949908-A (GB)
Title: Compound brake arrangement
Inventor: WOOLER ANTHONY
IPC: B61H11/14
Filed: 1962-07-13
Abstract: 949,908. Combined shoe and disc brakes. ROLLS-ROYCE Ltd. July 13, 1962, No. 27108/62. Heading F2E. In a combined shoe and disc brake for railway vehicles, when a brake shoe 19 mounted on a longitudinally and angularly movable actuating rod 18 is moved to its locking position by operation of a fluid-pressure actuating cylinder 13, the angular movement of the actuating rod causes the ram of a doubleacting hydraulic cylinder 28 to force hydraulic fluid into the operating cylinder 29 of a spottype disc brake. The disc 31 of the disc brake is mounted on an axle 10 of the railway vehicle inboard of the wheel 12 of a wheel pair 8. When the brake shoe 19 is retracted by means of a spring 24 angular movement of the actuating rod 18 is prevented by means of a conical member 22 mounted on the rod 18 seating in a complementary-shaped recess in a fixed member 20. The member 22 may be adjustable in position along the length of the rod to permit adjustment for brake shoe wear.
Patent GB-1361406-A (GB)
Title: Mobile track levelling and tamping machine
IPC: E01B27/17
Filed: 1971-04-19
Abstract: 1361406 Railway track maintenance machines F PLASSER 19 April 1971 [17 April 1970] 27127/71 Heading E1G In a machine for lifting, levelling and tamping a railway track in association with a track levelling reference system, spaced sleepers or sleeper-pairs are engaged by leading and trailing tamping heads 10, 20 mounted for relative horizontal displacement on leading and trailing chasses 4, 8 which are articulated together at 5 and are supported by wheel assemblies such as 2, 3, 6, 7, the arrangement being such that (a) the trailing tamping head 20 lies between front and rear wheel assemblies, and (b) there is a wheel assembly between the leading and trailing tamping heads. The pairs of tamping tools across the heads 10, 20 are said to close asynchronously. Ballast between and beyond the sleepers is compacted by a rear longitudinally-adjustable surface consolidator 56 and by central and rear ballast shoulder consolidators 57. The leading chassis 4 has a track lifting and aligning head 14, while the trailing chassis 8 may have a similar head but as shown has a vertically-adjustable trolley 24 which limits the lift imposed by the trailing tamping tools. The track level is monitored by an infra-red reference system 36-38, a cable reference system 29, and a laser beam system 48, effective in both horizontal and vertical planes 47, 47', the systems having associated rail-engaging trolleys one of which, 35, is shown as retractable. The track alignment is monitored by a pair of wires 44, 45 and trolley 46. The machine advance is controlled by distancemeasuring wheels 51 and by sleeper detectors 50 in the form of pulse transmitters as in Specification 1347013 and carries a paint spray 53. Figs. 6-10 (not shown) diagrammatically illustrate five modified machines: In Fig. 10 the articulated connection between the leading and trailing chasses incorporates a horizontal piston and cylinder (79) to vary their spacing. In Fig. 6 the twin tamping heads of Fig. 1 are replaced by single heads and the trailing chassis has only one wheel assembly (7a) of its own. In Fig. 7 the leading and trailing chasses are articulated to a common central bogie and each carries a pair of relatively-displacable single tamping heads. In Fig. 8 the leading and trailing chasses comprise independently mobile units articulated together at adjustable spacing by a piston and cylinder (68), the chassis respectively carrying a twin tamping head (10c) and a single head 20(c), together with surface consolidators (70). In Fig. 9 the leading chassis (71), with its single tamping head 10d, has no wheel assemblies of its own, but is articulatedly supported on the front end of the wheeled trailing chassis (72).
Patent GB-283670-A (GB)
Title: Improved washing and wringing machine
IPC: D06F15/00
Filed: 1926-10-30
Abstract: 283,670. Flower, E. A. Oct. 30, 1926. Washing-machines with rotary receptacles and with plungers or dollies; wringers, drip-boards for.-A wringer is combined with a washing-tub which is rotated about a vertical axis and in which a plunger is vertically reciprocated, a common drive being provided and means may be provided whereby the plunger is simultaneously rotated. The tub e is carried on a turntable c which is provided with a gas heater d<1> and rotated by a belt c<1>. A plate f may be carried loosely on a pin projecting from the bottom of the tub so as to rock and produce a rubbing- action on the clothes &c. The rod s to which the plunger S is secured is swivelled to a rod adjustably pivoted to a lever n which is oscillated about its sliding pivot o by a crank arm R engaging a slot q. The rod s is guided in the cantilever arm k to which the lever n is pivoted, and in which a pin or nut may be provided to co-act with a spiral groove on the rod s. The dripboard of the wringer comprises three members u, and may be tilted to discharge at either side.
Patent GB-955286-A (GB)
Title: Vehicle hydraulic transmission mechanism
Inventor: BAKER ALFRED DICKENS
IPC: F16H47/04
Filed: 1961-07-27
Abstract: 955,286. Toothed gearing. JOSEPH LUCAS (INDUSTRIES) Ltd. July 19, 1962 [July 27, 1961], No. 27212/61. Heading F2Q. In an hydraulic transmission mechanism, the driving shaft of a fluid actuated motor 6 carries a bevel pinion 15 which meshes a crownwheel 14, keyed to a sleeve 11 integral with a sun gear 9, and also meshes a ring gear 16, secured to a toothed annulus 10, the number of teeth of the ring gear 16 being preferably one more than that of the crown-wheel 14, and the drive is transmitted through planet gears 8 and a planet carrier 7 to an output shaft 3, to which the carrier 7 is keyed.