baber/WOPTO huggingface dataset:
Patent GB-1309813-A (GB)
Title: Optical components consisting of at least two lens elements
IPC: G02B3/00
Filed: 1970-05-01
Abstract: 1309813 Optical components ERNST LEITZ GmbH 1 May 1970 [2 May 1969] 21121/70 Heading G2J An optical component comprises a basic lens element O, Fig. 5 to which are cemented A-1 annular supplementary lens elements (A=3 in Fig. 5) separated by annular interfaces which are rotationally symmetrical about the optical axis of the component, the refractive indices of the elements and the radii of curvature of the interfaces being chosen so that lateral aberration due to the basic lens element is at least partially counteracted by the supplementary elements 1, 2. One or more of the interfaces may be partspherical or planar; the supplementary elements may be constructed to have a common edge R and to satisfy the following conditions: The sums A ## (E α+1  - E α ) tan i α  α=1 A and ## (E α+1  - E α ) tan<SP>2</SP>i α  α=1 are each small in comparison with the absolute values of the individual terms thereof; A the sum ## (E α+1  - E α ) tan<SP>3</SP> i α  is a measure α=1 of the quasi-aspherical operational properties of the component. (Here, E α  = percentage deviation of refractive index of element α from that of element O; i α  = angle between a meridian beam running inside element O at a point immediately radially inwardly of R, and the normal to surface α at that point.) The component may be incorporated in the photographic objective of Specification 1088192 (see Fig. 6) for which purpose appropriate data is supplied.
Patent GB-1260941-A (GB)
Title: Device for the automatic adjustment of the distance from a reference surface of a strut
IPC: F16M7/00
Filed: 1969-04-25
Abstract: 1,260,941. Springs; machinery supports. STAL LAVAL TURBIN A.B. 25 April, 1969 [7 May, 1968], No. 21252/69. Headings F2S and F2X. [Also in Division F1] A plant having a casing 1 enveloping and supporting a low pressure steam turbine 3 and condenser 2 and, at opposite ends, supporting an overhung high pressure steam turbine 4 and/or generator 5 has support means to compensate for variation in the height of the casing 1 so as to maintain the centre line 12 straight under all conditions. The support means comprises, under the turbine 4 and/or generator 5, an oilfilled bellows 9 which is fixed at its upper end to the plant foundation by a member 10 and at its lower end to the turbine 4 or generator 5 by a member 11. The interior of the bellows 9 is connected by a pipe 8 to a further oil-filled bellows 7 which supports the free end of the turbine or generator via a member 6. Thus, should the height of the casing 1 increase, e.g. owing to temperature change, member 11 rises to compress bellows 9 so that oil is forced through pipe 8 causing bellows 7 to expand and raise the free end of the turbine or generator. One of the bellows 7, 9 may be larger than the other to compensate for changes in the length of members connected to the bellows. There may be several bellows 7 and associated members 6. Additional support is provided by a spring-loaded member 13. In a modification, member 6 is omitted and bellows 7 is placed under member 13.
Patent GB-571381-A (GB)
Title: Improvements in resealing sanitary traps
IPC: E03C1/294
Filed: 1943-12-20
Abstract: 571,381. Sanitary traps. TAYLOR,G. Dec. 20, 1943, No. 21306. [Class 33] A trap, for use with sinks, water closets or other sanitary appliances comprising an outlet 1, an inlet 2, a chamber 3 into which the inlet 2 projects to a depth, which may be adjustable, a pipe 4 connecting the lower part of the chamber 3 with the outlet 1, and a passage 5 connecting the upper part of the chamber 3 which is at a higher level than the outlet 1, with said outlet.
Patent GB-717242-A (GB)
Title: An apparatus for microscopically measuring the thickness of particles
Inventor: ROBINS WILLIAM HENRY MALCOLM
IPC: G01B11/02
Filed: 1951-09-11
Abstract: 717,242. Interference microscopes. SINGER INSTRUMENT CO., Ltd. Dec. 10, 1952 [Sept. 11, 1951], No. 21335/51. Class 97(1) [Also in Group XIX] Apparatus for measuring the thickness of particles, comprises a microscope, a holder and slide adapted to receive the particles, and a sphere or lens having a spherical surface of known diameter in contact with the slide, means for providing relative sideways movement between the lens and the slide, and an eye-piece graticule in the microscope for indicating or measuring the distance between the point of contact of lens and slide, and the point of contact of lens and particle so that the thickness of the particles can be calculated. The apparatus may replace the front lens of the substage condenser of a microscope and comprises a spherical or partly spherical lens 6 held between an outer cap 4 and an inner cap 5 carried by a metal sleeve 2 which is internally threaded for attachment to the microscope. In a modification shown in Fig. 2 the spherical lens is replaced by a lens having one spherical surface for contacting the slide and a plane surface. In use particles are placed on a microscope slide on one side and contact is first made between the lens 6 and the slide clear of the particles. The point of contact of lens and slide is brought to focus in the field of view, which appears as the centre of a Newton's Rings interference pattern. The slide is then traversed from left to right and particles enter the field and are seen to meet the lens at varying distances from the point of contact of lens and slide. These distances are proportional to the square roots of the thickness of the particles. Lenses of different spherical curvature may be selectively accommodated by the inner and outer caps 4 and 5 to accommodate particles of various sizes. If the lens 6 becomes scored over its working area it may be rotated to bring a fresh portion of its surface into contact with the slide. By arranging that the cap 3 is slidable in the sleeve 2 excessive pressure on the slide is avoided and contact is preserved while the slide is traversed.
Patent GB-735235-A (GB)
Title: Improvements relating to luminescent screens
IPC: H01J9/22
Filed: 1952-08-25
Abstract: 735,235. Luminescent materials. GENERAL ELECTRIC CO. Aug. 25, 1952 (Aug. 25, 1951], No. 21337/52. Class 39 (1). A method of forming a transparent luminescent screen responsive to the bombardment of electrons, e.g. in a C.R.T., consists in depositing on a supporting surface a film consisting either of a suitable uncombined metal(s) or a suitable halogen compound(s) of a metal(s) together with an activator, and thereafter converting the film on the supporting surface to a luminescent sulphide or selenide of the metal(s). Zinc or a halide(s) thereof or a mixture of zinc and cadmium or of their halides or layers of both such materials may be deposited with suitable activating material to form the film. The metal(s) or halogen compound(s) may be deposited on the supporting surface by vaporization in vacuo and the film converted to a sulphur (selenium) compound by heating to approximately 500‹ C. in contact with sulphur vapour or a gaseous sulphur (selenium) compound such as hydrogen sulphide (selenide). The activator may be copper or silver. In one example, zinc fluoride or bromide activated with manganese is volatilized from the boat-shaped evaporator 2, Fig. 1, contained in the evacuated glass envelope 1, on to the glass or fused quartz base 9 to a thickness of about 0.25 micron. The coated base 9a is then transferred to a tubular reaction oven 10, Fig. 2, heated by the winding 11 to a temperature of about 500‹ C. Hydrogen sulphide or other gaseous sulphur compound is admitted by a conduit 12 and carried away together with reaction by-products by a conduit 13. In another example a mixture of 85 per cent zinc, 0.1 per cent copper and the remainder cadmium is fused in hydrogen and the mixture subjected to the preceding process. In a modification a film of zinc together with an activator of copper may be first applied to the base 9, following which a film of zinc and cadmium together with a copper activator may be applied and the dual film then converted to sulphides.
Patent GB-1040676-A (GB)
Title: Digital shift register
Inventor: FRANKS JOSEPH
IPC: G11C19/00
Filed: 1965-05-20
Abstract: 1,040,676. Semi-conductor devices. STANDARD TELEPHONES & CABLES Ltd. May 20, 1965, No. 21346/65. Heading H1K. [Also in Division G4] A shift register (Fig. 1, not shown) comprises a layer 1 of gallium arsenide on one side of which are arranged spaced hole injection contacts formed of gold and connected alternately in two series 2a, 2b &c., 4a, 4b &c., and on the other side of which are arranged spaced electron injection contacts formed of aluminium and connected alternately in two series 3a, 3b &c. and 5a, 5b &c., the contacts on the two faces being arranged in relatively staggered relationship as shown in Fig. 1. The contacts are connected to the various voltage sources via load resistors. In operation, a high current, low impedance condition is established between contacts 2a, 3a by applying a positive pulse Vp to the contact 2a. This condition exerts a switching influence on the adjacent current path 3a, 4a, so that when a positive voltage +V is applied to contact 4a, the high current condition switches to the path 3a, 4a, and the subsequent return of the contact 2a from voltage +V to zero voltage prevents any back-transfer. The high current condition is switched along the shift register in this manner. One face of the shift register may be fabricated by depositing the gold contact by evaporation in a vacuum, depositing an insulating film on the remaining area and finally depositing a chrome-nickel resistor pattern to form the load impedances, the opposite face being similarly fabricated.
Patent GB-649472-A (GB)
Title: Improvements in connection with the cleaning of filter beds
IPC: B01D24/20
Filed: 1948-08-13
Abstract: 649,472. Filters. CANDY, F. P. Aug. 13, 1948, Nos. 21354/48 and 3069/49. [Class 46] Non-circular filter beds are cleaned by jets of water issuing under pressure from pivoted arms which oscillate to and fro over the surface of the beds. Figs. 1, 3 and 4 show various arrangements and lengths of arms for beds of different proportions, to ensure that substantially the whole of the bed surface shall be covered in each case. The arm 9, Fig. 3, may be replaced by fixed jets. In Fig. 6 two pairs of arms of dissimilar length, 18, 19, 24, 25 are secured together at right angles, and are oscillated through an angle of 95 degrees. Minor areas of the bed not actually traversed by the arms are cleaned by jets discharging from the ends of the arms. Oscillation of the arms may be by hydraulic means (using for example the water supplied to the arms) or by electrical or manual means. In the first case it is preferred to use a portion of the available water power to work a separate water motor for oscillating the arms, rather than devices which cause the required changes in direction of travel of the arms by causing changes in direction of the jets issuing from them. Reversing gear may be controlled by the movements of the arms to produce the required oscillation. One only of the arms may be driven, and the driven arm connected to the others. When the pressure is low, the arms may be supplied with water in series. According to the first Provisional Specification. each arm may be provided with two rows of holes and a device for covering over or plugging up the holes of each row alternately. Alternatively, a pair of arms each with the necessary row of holes may be provided, and water supplied through a valve to only one arm at a time. A single arm with a single row of holes may be rotated on its axis to cause the change of direction of oscillation. According to the second Provisional Specification, the above valve device for a pair of arms may consist of a pair of discs, one of which covers the inlet end of one of the pair of arms while the water is free to pass into the other arm, the valve device being operated by a hingled striker on the arms cooperating with a stop. When the water is supplied to each arm (or group of arms) in turn, it may be done automatically by two three-way valves operated by the arm movements. Springs or dash-pots may be provided to stop and help restart the arms. Specification 22955/11, [Class 46], is referred to.
Patent GB-1099576-A (GB)
Title: Novel copolyamides and process
Inventor: RIDGWAY JAMES S
IPC: C08G69/26
Filed: 1966-05-13
Abstract: Linear fibre forming polyamides are composed of (A) 1 to 99 mole per cent units -NH-(CH2)6-NH-CO-(CH2)4-CO-and (B) 1 to 99 mole per cent of units <FORM:1099576/C3/1> where R is (CH2)4 or 1,4-cyclohexylene and R1 is H or C1- 3 alkyl, provided that the proportion of (B) is less than 50% when R is cyclohexylene. Various phenylindan dicarboxylic acids which may be used for component (B) are specified, 3 - (4 - carboxyphenyl) - 1,1,3 - trimethyl - 5 - indan carboxylic acid being used in the specific examples.
Patent GB-697566-A (GB)
Title: Apparatus for cooling lumpy material
IPC: F28C3/16
Filed: 1951-09-11
Abstract: 697,566. Cooling lumpy material. METALLGES AKT.-GES. Sept. 11, 1951 [Jan. 15, 1951], No. 21412/51. Class 51(ii) [Also in Group XXX] An apparatus for cooling agglomerated material comprises an endless conveyer of the apron type wherein the bottoms of the pans forming the apron conveyer are provided with louvres forming slots which enable a stream of gaseous cooling medium to be forced upwardly through the material by suction or pressure, while preventing the material from falling through the slots. The apparatus shown comprises a conveyer 1 formed of troughlike pans in the lower surface of which louvre slots 2 are formed. The cooling path a-b is covered by a suction hood 3 and connected to a fan 4 having a dust separator 5 connected thereto. The material to be cooled is charged at 6 and travels along the cooling path to the bunker 8 cold air being passed through it from the conveyer bottom upwards. As shown in Fig. 2 the cooled material may be discharged over stationarily arranged tipping flaps 10 or a travelling discharge carriage 11 into a series of bunkers 12. In the conveyer shown in Fig. 3 the base of the pan 13 has a series of upwardly bent portions forming louvres, the slots 14 formed by the bending being reduced by strips 15 to produce an overlap d thereby preventing the finer material from falling through. In a further embodiment the pan louvres are formed by bending the portions downwardly an overlap similar to d being produced by fitting into the bottom of the pan a plate having louvre slots formed by upwardly bent portions similar to those shown in Fig. 3. In another type of pan, Fig. 5, the base and/or side walls have apertures 22 and/or 23 for the passage of cooling air, strips 24 bent at an angle being introduced between the side walls at a distance f above the apertures. Sealing of the hood 3 shown in Figs. 1 and 2 is effected by movable side walls suspended therefrom contacting and overlapping in the manner of eaves the edges of side walls fixed to the conveyer.
Patent GB-492553-A (GB)
Title: Tufting mechanism for tufting a fabric base
IPC: D05C15/00
Filed: 1937-08-04
Abstract: 492,553. Sharpening cutters. TARADASH, M. A. Aug. 4, 1937, No. 21504. [Class 60] [Also in Group VII] In a tufting-mechanism on a sewing-machine the rotary cutter 10 is honed continuously, or intermittently, by a hone 16. The hone comprises rotatably mounted sections of steel, glass, leather, &c., which are pressed against the sides of the cutter 10. An arm 18 carries the hone 16.
Patent GB-1067405-A (GB)
Title: Improvements in or relating to soil drainage
IPC: E02B11/00
Filed: 1965-05-21
Abstract: A method for the acceleration of soil drainage to effect consolidation of soft soil, such as peat bogs, comprises arranging in the soil a number of vertically disposed pipes having openings therein and applying a surface load, such as the gravel foundation of a road, to the soil area whereby excess moisture in the soil is squeezed into the pipe network to flow upwardly therein and drain away from the upper ends of the pipes.
Patent GB-1069915-A (GB)
Title: Improvements relating to dobbies
Inventor: HINDLE THOMAS
IPC: D03C1/12
Filed: 1963-05-30
Abstract: 1,069,915. Gear dobbies. HINDLE SON & CO. Ltd. May 22, 1964 [May 30, 1963], No. 21679/63. Heading DIE. A gear dobby comprises a single continuously rotating driven gear and a driven gear which is driven periodically, once per revolution of the crankshaft, the driven gear actuating axially fixed but rotatable crank gears which are locked against rotation when not coupled to the driven gear. The gear dobby comprises crank wheels 7 which are driven by gears 25, fixed to splined shafts 23, which shafts are selectively rotated by engagement of an axially slideable pinion 26 which may be engaged by a rotating drive wheel 17, a separate shaft 23 and gear 25 being provided for each crank and the shafts being arranged circumferentially around the common crank axis. The driving gear 17 is driven intermittently by a shaft 14 from a mutilated gear arrangement 70, 15. At a dwell period in the drive the pinion 26 is moved by a pneumatic piston 29 under control of electrical switches and a solenoid from a fixed gear 18 into engagement with the driving gear 17. The rotation is then sufficient to move the respective crank 7 from the top dead centre position to bottom dead centre position or vice versa and so move the jack lever 10. A patterning device 31, Fig. 1, actuates a two way switch 30 to indicate whether the jack lever is next to be raised or lowered and a second two way switch 32 operated by the jack lever indicates the present position of the jack lever. The circuit arrangement is such that the armature position of the control solenoid 60 is not changed if the present and required positions of the jack lever are the same.
Patent GB-1430047-A (GB)
Title: Printer apparatus
IPC: B41J11/42
Filed: 1974-05-16
Abstract: 1430047 Automatic electric control of position INTERNATIONAL BUSINESS MACHINES CORP 16 May 1974 [26 June 1973] 21723/74 Heading G3N Printing apparatus includes means for feeding forms to a print station and a control means responsive to a detector of the leading edge of the form and to the motion of the form to align a predetermined line on the form with the print station. In the constructional arrangement shown in Fig. 1 the form 10 is advanced by a pin tractor feed mechanism including belts 15 and 16 driven by motor 22 past the print mechanism 12. A sensor 30 detects optically the leading edge of the form and a sensor 32 detects the passage of the form by an optical arrangement co-operating with the feed holes in the form. The motion of the form can also be detected by the transducer arrangement 27, 28 which is used to give positions intermediate those provided by the feed holes sensor. Effectively the control circuit shown in Fig. 2 includes a counter which is incremented by the motion of the form until a pre-set count is reached which count corresponds to the distance D + d when a print enable signal is generated and the normal print control takes over.  In operation the switch 49 is closed to start the motor 22 and the thread latch operates to remove the reset signal from align counter 34 but this does not count pulses from sensor transducer 33 until it is enabled by the leading edge sensor 31. The pulses from sensor 33 are also applied to the reset terminal of jam counter 41. A manually pre-set code corresponding to the number of pulses representing distance D + d is stored in register 39 and the count in counter 34 is compared with this figure in comparator 38 until equality is obtained when a print enable signal is generated and control is taken over by the CPU. The thread latch is reset and this holds the align counter reset during further feeding of forms. If there is no form present e.g. because of a jam then the output from transducer 28 will increment jam counter 41 until a pre-set value is reached when a stop and reset signal is generated. In an alternative arrangement Figs. 5 and 6 (not shown) the pulse output from the transducer 28 can be used in align counter 34 for positioning the form. The passage sensor 32 may be spaced a longer distance from the form edge sensor and used to give automatic starting of the printer when a form is inserted. In this case a delay is needed in the jam counter circuit, Figs. 3 and 4 (not shown).
Patent GB-587498-A (GB)
Title: Improvements in electrical carrier-wave systems
IPC: H04B7/155
Filed: 1944-11-06
Abstract: 587,498. Wireless signalling. GENERAL ELECTRIC CO., Ltd., and ESPLEY, D. C: Nov. 6, 1944, No. 21757. [Class 40 (v)] A carrier-wave relay system adapted to transmit signals covering a wide band of frequencies, such as television signals, comprises a number of link stations, arranged so that at least one of the link stations transmits positively modulated waves, and at least one other link station transmits negatively modulated waves. A carrier-wave positively -modulated by a television signal, Fig. 2 (a), falls to a minimum at the crests s of the synchronizing signals and rises to a maximum at the highest light intensity h, while a negatively modulated carrier, Fig. 2 (b), has its maximum at the crests s of the synchronizing signals and falls to a minimum for the highest light intensity h. Preferably, successive link stations transmit waves modulated in opposite senses.
Patent GB-451890-A (GB)
Title: Improvements in or relating to the production of titanium pigments
IPC: C01G23/053
Filed: 1935-07-31
Abstract: The hydrolysis of titanium salt solutions is effected by heating in the presence of a gel comprising a hydrated titanium compound.  The gel may be added in the dry state in a quantity corresponding to 2--5 per cent of the titanium present calculated as TiO2.  Formation of the gel may be effected by neutralizing a titanium sulphate or chloride solution with an alkali or alkaline-earth metal hydroxide, carbonate, or sulphide, or by adding acid to an alkali or alkaline-earth metal titanate. By carrying out the hydrolysis in the presence of a carrier such as barium or calcium sulphate, composite products may be obtained. The products of hydrolysis, after washing and calcining, are suitable for use as pigments.  Reference has been directed by the Comptroller to Specification 329,041, [Class 1 (iii)].
Patent GB-659472-A (GB)
Title: Improvements in and relating to apparatus for the manufacture of glass and in alloystherefor
IPC: C03B5/167
Filed: 1949-08-23
Abstract: In the manufacture and handling of molten glass a part which is required to be in contact with the molten glass at elevated temperatures is formed of an alloy of 85-99.5 per cent Rh with at least one metal of the group Pt, Pd, Ni, Co.  Specifications 436,250 and 471,838 are referred to.