baber/WOPTO huggingface dataset:
Patent GB-483033-A (GB)
Title: Improvements in or relating to the testing of lenses or other image producing optical devices
IPC: G01M11/02
Filed: 1936-10-10
Abstract: 483,033. Photo-electric apparatus for testing lenses and mirrors. COLLINS, G. Oct. 10, 1936, No. 27563. [Class 40 (iii)] [Also in Group XX] Apparatus for testing focal characteristics such as focal length and astigmatism, of lenses, mirrors, &c., comprises means for directing a beam of.light through or onto the lens &c. to cause it to direct on to a lightsensitive cell a beam which passes between the lens and cell through a mask which cuts off a portion of the light depending on the value of the characteristic to be tested, the cell being connected to an indicator responsive to the illumination of the cell. The invention is particularly concerned with sight-testing apparatus in which the lens to be tested is that of the eye. Figs. 2 and 3 show apparatus for this purpose, in which light from a line source 10 is directed onto a semi-transparent reflector 11 which directs it through lenses 12, 12<1> to a reflector 15 by which it is reflected to the eye 16. The eye-lens, if functioning normally, forms an image of the source 10 on the fundus, which, acting as a reflector, returns the light along its incident path. Part of the returned light traverses the reflector 11 and is focused on a mask 17 in the form of a grid of alternate bars and spaces, the width of each bar and of each space being equal to that of the image of the source 10 when properly focused in the plane of the grid. The reflector 11 is oscillated by an electromagnet 13 about a horizontal axis in its own plane to cause the returned beam to be reciprocated across the grid. A light-sensitive cell 18 behind the grid is connected through a pre-amplifier 19 and a main amplifier in the base 20 to an indicator 21. The amplifier includes a filter to eliminate direct current. If the light is brought to a focus in the plane of the grid, the reciprocation of the beam results in the light alternately passing wholly through the grid and being wholly obturated thereby so that the illumination of the cell has its maximum periodic fluctuation, and the indicator 21 gives maximum reading. To enable the light to be focused in the plane of the grid the lens 12 is arranged to be adjustable along its axis, the displacement required to obtain a maximum reading being a measure of the correction which must be applied to the eye and being read on a scale 31. To enable the eye to be tested in different meridians the tube 23 containing the lamp 10, reflector 11, and grid 17 may be rotated about the axis of the lenses 12, 12<1> by a hand wheel 22. Alternatively, a rotatable reversing prism may be disposed between the lenses 12, 12<1>. The indicator 21 preferably consists of a cathode ray tuning indicator coupled to the rectified output of the amplifier by a single resistance-capacity stage with a diode arranged to limit the maximum positive signal voltage applied to the indicator. The rays incident on the eye may be confined to the infra-red by providing a suitable filter in the path of the beam.
Patent GB-840353-A (GB)
Title: Improvements relating to the frequency control of electronic oscillators
Inventor: DEHN RUDOLPH ALBERT
IPC: H03B5/18
Filed: 1957-09-02
Abstract: 840,353. Frequency-shift radio signalling; valve oscillator circuits. GENERAL ELECTRIC CO. Sept. 2, 1957, No. 27605/57. Classes 40 (5) and 40 (6). Two or more resonators tuned to the same frequency are tightly coupled together to produce a plurality of resonant frequencies for the system and connected to a U.H.F. oscillator having a large capacity between grid and cathode of negligible impedance at operating frequencies and whose frequency may be shifted by selectively varying the anode voltage to resonate with one or other of the resonant frequencies. As shown, the resonators may be of coaxial form, one (3) closed at both ends by connections of half-wave length, the other and shorter (4) closed at one end and connected at the other end to the anode 14 and grid of a dystron tube having coaxial parallel planar electrodes as described in Specification 665,550, whose grid 15 and cathode 17 are connected by a large zero R.F. impedance capacity. The resonators may be adjustably coupled by a section of concentric transmission line 7 whose inner conductor is connected to the outer at each end to form loops projecting into the resonators, and which is rotatable between spring clips 10 of the resonators to adjust the plane of the loops relative to the magnetic fields of the resonators and therefore the frequency spacing of the alternative frequencies generated. The latter, spaced by equal amounts on either side of the common frequency of the resonators, are generated by selectably switching the anode potential of the dystron. The tube heater voltage is supplied by leads 20, 21, and the grid is biased by a source 23. Alternatively, electric field coupling between the resonators may be used.
Patent GB-421677-A (GB)
Title: An improvements in or relating to distributing connectors for sealing boxes of electrical cables
IPC: H02G3/16
Filed: 1933-10-07
Abstract: 421,677. Junction boxes. SYKES & DYSON, Ltd., SYKES, P., and COOPER, W., Queen's Mill Road, Huddersfield. Oct. 7, 1933, No. 27640. [Class 38 (i)] In order to avoid the provision of a new sealing- box when an installation is extended, a fitting is provided which is adapted to be secured to the sealing-box and comprises a connector whereby a conductor emerging from the sealing box may be connected to several installation conductors. The connector is a metal block d having a passage at one end for the main conductor and passages at the other end for installation conductors, all conductors being secured by set screws. It is housed in a two-part insulating casing adapted to fit at the end b over a projecting nipple on the sealing-box and having an opening c or series of openings at the other end through which the installation conductors pass. An insulating disc e is provided to cover such of the passages in the block d as are not in use. The disc is preferably set back from the edge of the opening c to enable insulating compound to be run into the fitting when the connections have been made.
Patent GB-261364-A (GB)
Title: Improvements relating to fluid operated hammers
IPC: B21J7/36
Filed: 1926-11-04
Abstract: 261,364. BechÚ, H. Nov. 14,1925, [Convention date]. Steam hammers.-The hammer g is projected upward by means of fluid - actuated pistons and is then allowed to fall freely. Handoperated inlet and exhaust valves i, k control the fluid supply through pipes connected to the cylinders. The fluid is supplied for a part of the stroke and is then expanded. The cylinders mav be formed in or around the base a. The Specification as open to inspection under Sect. 91 (3) (a) states that the pipes are flexible. This subject-matter does not appear in the Specification as accepted.
Patent GB-1440965-A (GB)
Title: Method of and apparatus for processing film
IPC: G03D13/08
Filed: 1973-06-11
Abstract: 1440965 Photographic processing HANSHIN GIJUTSU KENKYUSHO KK 11 June 1973 [10 June 1972] 27754/73 Heading G2X Radiographic or photographic film is processed by (a) attaching a single piece of film in a planar condition in the median plane of a single, generally annular, rigid frame-like holder and (b) moving the holder containing the film successively through at least two generally vertical parallel bath chambers (30, 40 or 50) containing processing liquid, the, or each pair of adjacent chambers being separated by a generally vertical partition wall (31, 41 or 51), the film holder being transferred from one bath to the next by lifting it to a position adjacent an open window (32, 32'or 42, 42'or 52) in the partition wall between the bath chambers, passing it through the open window and allowing it to drop by gravity into the next bath; the film holder is moved vertically through the baths while it is maintained parallel to the partition wall(s) by engaging its periphery, e.g. by arms (33 or 43, 43') or rotating discs (53, 53'). Figs. 9-17 (not shown). The holder may have a groove (2), Fig. 1 (not shown), or projections (70, 80, 90), Fig. 2, (not shown), retaining the film, or may be in two parts Fig. 4, (not shown). A stepped portion (6) Fig. 3 (not shown), and a special device Figs. 5-7 (not shown) may be provided to assist insertion of the film into the holder.
Patent GB-688575-A (GB)
Title: Improvements in the continuous casting of metal strip or the like
IPC: B22D11/06
Filed: 1950-11-14
Abstract: 688,575. Continuous casting - machines. HAZELETT, C. W. Nov. 14, 1950, No 27772/50. Class 83 (i). In a continuous casting-machine, metal is poured between endless flat metal bands moving in vertically spaced relation and guided so as to form two zones, one forming a bath for molten metal and a second in which the bands are closer together and in which the metal solidifies. Upper and lower interconnected frame portions 10, 11 carry endless bands 17, 18 of flexible metal driven by rollers 25, 40 and tensioned by hydraulically adjustable rollers 19, 36. The lower run of the band 17 and the upper run of the band 18 pass a pair of concave guide rollers 28, 38 and two pairs of plain rollers 30, 39 and 31, 39. Rollers 30 and 31 may be simultaneously adjusted by a hand wheel 35 to vary the distance between the bands. Between the edges of the adjacent runs are water-cooled tubes 51 of rectangular section on to which the edges of the bands are pressed first by the rollers 28, 38, Fig. 4, then by sealing strips 46, 50, Fig. 5, secured to members 44, 49 spaced from the bands and forming therewith water-cooled channels 45, 48 and finally by sealing strips 59, Fig. 2, secured to members 56 forming further cooling channels. The bands are driven in the direction of the arrows D, molten metal from a spout S forms a pool in the convex space formed by the bands between the rollers 28, 38 and 30, 39 and passes into the mould section formed by the opposed runs between the rollers 30, 31 and finally emerges as the strip M. The water-chamber members 44, 56 and 49, 56 are joined by arcuate members 54, 55 surrounding the rollers 30, 39. In order to prevent the pressure of the cooling liquid around the mould portion from deforming the bands, the members 56 may be magnetic so as to pull the bands into contact with spacing members 58, Fig. 2. During the return run each band is dried and heated by gas jets 61, which, while the bands are being driven, are turned against a spring 62 by a solenoid 63 so as to direct the jets on to the band. The side members 51 diverge slightly in the direction of movement of the casting to reduce friction. By turning the shaft 21 of a roller fork 20, the band may be caused to move laterally along the roller 19. This fact is used to keep the bands correctly aligned, the fork being turned hydraulically if the band moves laterally sufficiently to close an electric contact. In modifications intended for use when casting thin sheets, the side tubes 51 are dispensed with and the edges of the bands pressed together by the sealing strips 46, 50, or as shown in Fig. 8, narrow endless ribbons 79, 80 may be positioned between the sealing strips and the bands 17, 18. In another modification, Fig. 9, the bands 17, 18 are spaced apart by one or more endless ribbons 81 positioned around the outside of the band 17 by rollers 82 ... 84. As shown in Fig. 11, the bands are spaced apart by rectangular copper blocks 87 carried by endless chains 85 at each side of the bands so as to overlap at the edges.
Patent GB-1384608-A (GB)
Title: Mechanical shock and sway arrestor
IPC: F16L3/215
Filed: 1972-06-14
Abstract: 1384608 Rigid yielding support for pipes; screw and nut mechanism L S SUOZZO 14 June 1972 [14 Dec 1971] 27796/72 Headings F2P F2S and F2Q A device which provides a rigid support for sudden movements of a pipe, but allows slow movements of the pipe, comprises a screw and nut arrangement wherein rapid movement of the screw results in abutment of the nut against a housing to prevent its rotation. Construction.-As described the housing H1 is in two parts 12, 21 joined by screw threads 13. A ring 50 is held rotatably between thrust bearings 53, 54; the bearings being engaged by apertured plates 17, 23 to prevent axial movement of the disc 50. A tubular member 47, fast with the nut N-1, is keyed by pegs 52 to the ring 50 so that the nut is axially slidable with respect to the ring but relative rotary motion therebetween is prevented. The axial movement of the nut with respect to the ring 50 is resisted by diaphragm springs 54 which centre the nut between end wall 14 and plate 17. Screw S-1 passes through wall 14 and is engaged within the nut by a ball mechanism. The aperture between the screw and the end wall 14 may be protected by a bellows 42 and an indicator arm 36 carried by the screw has a pointer 37 moving over a scale 40. A set screw may pass through the pointer to engage a groove in the housing H1 to lock the device prior to and during installation. Operation.-Slow axial movement of the screw causes the nut and disc 50 to rotate, the springs 54 being sufficient to prevent axial movement of the nut within disc 50. Rapid axial movement of the screw causes the nut to move sufficiently against the resistance of the springs 54 to allow end 46 to abut housing wall 14 or to allow end 48 to abut partition 17. The nut is thereby prevented from rotating and the load is transmitted from screw to nut to housing as if the device were rigid.
Patent GB-918640-A (GB)
Title: Monosodium l-homocysteate and foodstuffs containing it
IPC: A23L27/21
Filed: 1961-08-01
Abstract: The invention comprises monosodium L-homocysteate, and its production as an aqueous solution by neutralising L-homocysteic acid with sodium hydroxide, carbonate or bicarbonate; evaporation or addition of alcohol gives the crystalline salt.  The salt or its aqueous solution is used as a food seasoning (see Group VI).ALSO:Foods, exemplified by soya bean sauce, rice liqueurs, bean paste soup, a chicken noodle soup mix, a meat soup mix and a chicken bouillon, are seasoned by monosodium L-homocysteate prepared from L-homocysteic acid and sodium hydroxide, bicarbonate or carbonate in aqueous solution.
Patent GB-519089-A (GB)
Title: Improvements in or relating to musical drums and the like percussion instruments
IPC: G10D13/02
Filed: 1938-09-24
Abstract: 519,089. Snare drums. DEANS, C. F. Sept. 24, 1938, No. 27875. [Class 88 (ii)] In order that the snares may adjust themselves with even pressure, both laterally and longitudinally, on the drum head, a loose pivotal connection 24 is interposed between the snares 20 and the manual control 10. To apply the snares, shaft 13 is turned by lever 10, lifting a bar 16 by links 14, 15. To the bar 16 at 24 are pivoted links 23 rigidly attached to another bar 18 connecting the snare holders 19. The lateral and longitudinal adjusting movements permitted by the pivot 24 are limited by the slots 17a through which the bar 18 passes. In a modification, (Fig. 4, not shown), the snares are arranged internally of the drum head and are applied against spring action; means collectively adjusting the tension of the snares is also shown.
Patent GB-144190-A (GB)
Title: Improvements in or relating to watches
IPC: G04B37/14
Filed: 1919-11-11
Abstract: 144,190. Duckworth, F. Nov. 11, 1919. Bows.-The bow a is formed with a cross-bar b to prevent the shackle of a chain from catching under the winding-knob c.
Patent GB-204544-A (GB)
Title: Improvements in sub-aqueous rock cutting apparatus
IPC: E02B3/02
Filed: 1922-10-14
Abstract: 204,544. Lobnitz, Sir F., and Lobnitz & Co., Ltd. Oct. 14, 1922. Manoeuvring by pull on anchor ropes.-A floating structure carrying a sub-aqueous rock - cutting apparatus is manoeuvred by pulling on chains 1, 2, 3, each passing around opposite winch drums of two sets 4, 5, 6, and 7, 8, 9, and through a chain locker 10. These drums are arranged to be driven independently from a single engine d. The chain 1 passes from one side anchor at the bow to another side anchor at the bow, the chain 2 from an anchor ahead to an anchor astern, and the chain 3 from one side anchor at the stern to another side anchor at the stern as shown in Fig. 2.
Patent GB-665468-A (GB)
Title: Improvements in and relating to electric discharge devices
Inventor: SMART DAVID LORIMER
IPC: H01J13/10
Filed: 1948-10-27
Abstract: 665,468. Electric discharge devices. ENGLISH ELECTRIC CO., Ltd. Oct. 21, 1949 [Oct. 27, 1948], No. 27933/48. Class 39 (i). The cathode of a metal vapour electric discharge device comprises a shallow pool of metal supported on a flat metal plate forming part of the envelope and provided with an upstanding marginal flange the edge of which is sealed to the vitreous or ceramic portion of the envelope, the seal being below the level of the cathode metal. As shown, Fig. 1, the liquid mercury cathode 4 is supported by a "Kovar" Registered Trade Mark) plate 1, and extends above the level where the flanged marginal portion of the plate 1 is sealed at 2 to the tubular glass envelope 3. The plate 1 is stiffened by a steel disc 7 copper brazed thereto and cooled by a metal radiator 5 having cooling fins 6 secured to the disc 7. A connection 8 for the grid 11 is brought through the cathode by means of a glass seal 9 and Kovar eyelet 10, welded to the plate 1, and above the cathode liquid level the insulation of the grid lead is effected by beads 13, the gaps between the beads forming a highly deionized path to the lead 8 to facilitate operation of the device. The lead-in 14 for the excitation arc supply is similarly brought through the cathode and is connected to a support 18 of a magnetically-operated ignition dipper electrode 19, as described in Specification 665,467. A cathode spot fixing plate 20 secured to the disc 1 projects from the mercury surface near the dipper 19, and increases stirring of the cathode liquid to enhance cooling. In another embodiment, Fig. 2, the Kovar cathode supporting disc 28 is annular in shape and is sealed to the envelope 23 and to an inner tube 24 through the closed upper-end of which are sealed the lead-in grid and excitation conductors 25, 26 and an exhaust and sealing-off tube 27. The disc 28 is stiffened by a Kovar plate 30 copper-brazed thereto, to which a mild steel radiator 31 is soldered after baking out. An annular steel or other body 37 of high thermal conductivity, provided with a spot fixing ring 38 is mounted beneath the cathode surface to reduce the quantity of mercury 22 required and to enhance cooling. The body 37 is slightly spaced from the plate 28 or may itself form the major portion thereof, in which case Kovar rings welded to its outer and inner peripheries are sealed to the envelope 23 and tube 24. In a further embodiment, the major portion of the Kovar cathodesupporting plate is made re-entrant, in order to reduce the amount of cathode material. The ratio of cathode diameter to depth of cathode material is between 6: 1 and 30: 1.
Patent GB-212597-A (GB)
Title: Improved method in mixing rubber compounds as used in the manufacture of rubber goods, insulating paints and varnishes
IPC: C08J3/22
Filed: 1922-10-16
Abstract: 212,597. Russell, R., and Broomfield, H. Oct. 16, 1922. Paints.-Rubber latex, preferably of high concentration and optionally heated with a softening agent to depolymerize the rubber, is mixed with filling and colouring agents which have been previously ground into a sludge with water. The mixture may be used directly as a paint, or it may be coagulated, dried, and dissolved in a suitable solvent for use.
Patent GB-1069642-A (GB)
Title: Steering trailers
Inventor: MARCH ADRIAN ANTHONY CECIL
IPC: B62D13/04
Filed: 1963-07-16
Abstract: 1,069,642. Steering trailers; underframes. W. C. YOUNGMAN Ltd. July 15, 1964 [July 16, 1963], No. 28138/63. Headings B7D and B7H. A trailer comprises two steerable wheels 3 connected to a drawbar 1, two self-aligning castor wheels 10 and a vertically movable non- steerable wheel 2 midway between drawbar pivot 21 and a hitch 28 for a further drawbar, whereby a train of such trailers turns about a common point. To permit manipulation of the trailer the steering arms 25, 26 are pivoted on horizontal pins to the spindles of the wheels 3 and each comprise two parts rotatable one within the other about the longitudinal axis of the arm allowing the wheels 3 to castor freely when the drawbar and arms are in a vertical position as is described in patent Specification 1,069,643. In a development (Fig. 7, not shown), drawbars and hitch points are provided at both ends of the trailer, the wheels 3 and (3a) castoring freely when the corresponding drawbar is vertical. The central wheel 2 may be carried by a pair of levers (9) (Fig. 3b, not shown), pivoted below platform 4 and urged downwards by a weight (11) carried by the levers (9) or alternatively by a subframe 5 (Figs. 6 and 7) which also carries the wheels 3 and is connected, for example by a pin-and-slot connection, to subframe 6 carrying the wheels 10 or (3a), the platform 4 being supported on bearings 16 from the subframes. A compression spring may be provided between the platform and subframe 5 near wheel 2 to ensure that more than half the unladen platform weight is borne by wheel 2. The wheels may be replaced by tracks, skids or skates.
Patent GB-1207508-A (GB)
Title: Improvements in or relating to teleprinters and the like
Inventor: WILLCOX FREDERICK PRESTON
IPC: H04L17/22
Filed: 1967-09-20
Abstract: 1,207,508. Selective printing. F. P. WILLCOX. 20 Sept., 1967 [21 Sept., 1966], No. 28210/70. Divided out of 1,207,507. Heading B6F.  The subject-matter of this specification is included in the parent Specification 1,207,507, but the claims are directed to paper feeding means which are movable incrementally relative to the printing mechanism and associated with left and right margin stop means defining respective margin limits then positioned by code-controlled means.
Patent GB-1182106-A (GB)
Title: Improvements in Circuits for Rapid Energisation of Magnetic Field Windings
Inventor: TWELLSIEK FRIEDEL
IPC: H01F7/18
Filed: 1967-06-19
Abstract: 1,182,106. Energizing and de-energizing electromagnets. W. BINDER [trading as BINDER MAGNETE K.G.] 19 June, 1967 .[18 June, 1966], No. 28232/67. Addition to 1,097,209. Heading H2H. Apparatus for the rapid energization of an electromagnet as described and claimed in Specification 1,097,209, is modified in that the control means for the electronic switches which control the current flow in the electromagnet winding comprise a transistorized switching circuit. Closure of switch 290 causes thyristors 233, 234 to conduct and also, by way of a circuit including capacitor 414 and transistors 241, 242, thyristors 231, 232. Thus an electromagnet 270 is energized simultaneously from a high voltage source 213 and a normal voltage source 214. When the capacitor 414 has discharged, the gate potential of thyristors 231, 232 is removed and the electromagnet 270 remains energized only from the normal voltage source 214. When the switch 290 is opened to de-energize the magnet 270, the de-energization is accelerated by momentarily rendering the thyristors 231, 232 once more conductive so as to apply to the electromagnet 270 a high voltage in opposition to the self-induced voltage of the electromagnet. The means for rendering the thyristors 231, 232 conductive when the switch 290 is opened comprises a transistor 261 which is under the control of transistors 251, 252 and capacitor 514 together with a phase shifting circuit 280, 283. By means of this latter circuit the deenergization of the electromagnet is always initiated at a given point in a half wave of the supply, for example, at 135 degrees