baber/WOPTO huggingface dataset:
Patent GB-385456-A (GB)
Title: Improvements in apparatus for projection of light
IPC: F21V7/00
Filed: 1932-01-27
Abstract: 385,456. Vehicle &c. lamps. COOKE, A. G., 101, Brondesbury Road, London. Jan. 27, 1932, Nos. 2510 and 14375. [Classes 75 (ii) and 75 (iv).] In a vehicle or like lamp comprising a source of light at one focus F of a reflector which is closed except for a central aperture M, N and is adapted to reflect back towards the source those rays that are not suitably directed at the first reflection, a convex intercepting reflector T is arranged between the source and the aperture and facing the latter. In the form shown in Fig. 2, the reflector S has the shape of a prolate spheroid, an ellipsoid, or confocal ellipsoids, the reflector T is carried by metallic strips G, and the aperture M, N is of about the same diameter as the electric lamp bulb L. The emerging beam may be made parallel or given any desired divergence by means of a lens H, and one or more supplementary inclined reflectors R may be arranged around the bulb holder so as to reflect on to the upper portion of the reflector S those rays which would otherwise be scattered by the glass bulb. In the form shown in Fig. 3, a paraboloidal reflector P is combined with a confocal paraboloidal or spherical reflector P<1>, instead of the usual front glass, and the reflector T is also a confocal paraboloid. The latter may be formed by silvering a portion of the bulb L, and a concave lens may be employed when the source of light is displaced from the focus F to give convergent reflections. In Fig. 4 (not shown), an ellipsoidal back reflector is used in combination with a confocal hyperboloidal front reflector, a confocal hyperboloidal intercepting reflector, and a negative lens. A half ellipsoidal reflector may be closed by a plane reflector, and the lens may be inside or outside the reflector, or integral with the front glass.
Patent GB-279291-A (GB)
Title: Improvements in or relating to protective linings for tanks
IPC: C09D105/00
Filed: 1927-01-28
Abstract: 279,291. Soc. Electro-Mecanique d'Appareillage pour l'Essence. Dec. 31, 1926, [Convention date]. Tanks are lined with Guayule, a gum derived from a shrub known as Parthenium Argentatum, and/or derivatives thereof, which may be mixed with rubber or used with other linings.
Patent GB-1406407-A (GB)
Title: Method of making an electrically-insulating seal between a metal body and a semiconductor device
IPC: H01L21/58
Filed: 1973-01-18
Abstract: 1406407 Semiconductor devices RCA CORPORATION 18 Jan 1973 [21 April 1972] 2655/73 Heading H1K A semiconductor device is insulatingly mounted on a metal body, such as a heat-pipe wall of nickel-plated copper, through the intermediary of a tungsten coated silicon layer formed on an insulating layer provided on the semiconductor body of the device. In the embodiment the device is a silicon thyristor, the surface of which is oxidized in steam at 900 C. to provide the insulating layer 0À6Á thick, on which a 1Á of polycrystalline silicon is deposited from silane at 700 C. This is coated by evaporation of palladium or platinum which serves to protect the silicon from the tetrafluoride used in the next step of depositing a 1-1À5Á thick layer of tungsten. After eleetroplating the tungsten with a layer of nickel 1Á thick the device is solder-dipped and attached to the metal body.
Patent GB-1396612-A (GB)
Title: Production of titanium tetrachloride
IPC: C22B34/12
Filed: 1972-01-20
Abstract: 1396612 Titanium tetrachloride; titanium dioxide LAPORTE INDUSTRIES Ltd 8 Jan 1973 [20 Jan 1972] 2724/72 Headings C1A and C1N Titanium tetrachloride is made by thermally treating a titanium-bearing ore (e.g. ilmenite) with carbon in a reactor 10 and passing the pretreated ore to a leacher 11 wherein it is treated with HCl. The effluent from leacher 11 is recycled via an acid-recovery unit 12 from which solid oxide is removed through a valve 14 whilst the benificiated ore is reacted with chlorine in a chlorinator 15. The gaseous chlorination products are passed to a purification plant 16 and the resulting liquid titanium tetrachloride is passed to an oxidation reactor 18. Titanium dioxide from the reactor 18 is recovered in a condensation zone 20. Waste gases from the purification zone 16 together with waste gases from the oxidation reactor 18 are passed to a scrubber 20 the effluent from which together with waste from solid chlorides from the purification plant 16 are combined in a zone 17. The resulting slurry is passed to a filtration unit 21, the recovered solids from which are returned to the chlorinator 15. Recovered liquid, containing soluble chlorides, from the filtration unit 21 is combined with effluent from the leacher 11 and passed to the acid recovery unit 12.
Patent GB-1376564-A (GB)
Title: Terminal interface
IPC: H04L5/22
Filed: 1973-01-19
Abstract: 1376564 Digital transmission; stations on a serial loop INTERNATIONAL BUSINESS MACHINES CORP 19 Jan 1973 [15 Feb 1972] 2762/73 Heading H4P A station on a serial loop has a selectively operable by-pass and comprises means for accepting data from the loop and reinserting it. The means has a plurality of sequentially arranged storage locations connectable alternatively with a local source of signals, e.g. a terminal, to the loop and control means to enable incoming signals to be stored when the local source is transmitting and to retransmit when the local source has finished; it is also arranged to inhibit the local source until the storage means is empty.  Each station on a loop 12 includes a gate 13 normally passing signals but openable by signal B. A clock circuit 13 derives clock pulses S1, S2 at bit rate from data which is shifted into register 15 having an output to decoder 16 which looks for a framing signal and individual address code and gives outputs to AND'S 17, 18 which are enabled at S2 time. An output from the last stage of SR15 is applied to AND 20 enabled by a load signal L, the output being applied to the first stage of shift register 21 storing N characters, each with a separate shift control, bits proceeding through N stages seriatim. During loading shift pulses S1 are applied to all stages. In an unload mode, via gates 25 (1-n) and OR23 (1-n), the contents of one section only are shifted at a time under control of unload signal U, the characters being passed back to line downstream. A sync. signal generator 28 through AND 29 under the control of frame signal G provides frame or sync, characters when station is receiving and not simultaneously sending data. The content of SR15 may pass alternatively to terminal 30 through AND 31 enabled by control signal R. Terminal 30 may transmit through AND 32, when enabled by transmit signal X, also provide signal D indicating an end of block, and signal T to request access to loop. Reversible counter (33), Fig. 2 (not shown), when enabled is stepped at each pulse S2 and provides output 1-n applied to AND gates 25 (1-n) and 26 (1-n); the counter increments under load signal L and decrements under U ; the counter is static with both L, U present and is reset with neither. AND circuit (54), Fig. 7 (not shown), provides by-pass signal B when the station and terminal are inactive. In Fig. 9 (not shown), the method of loading and unloading shift register 21 sections is reversed to that described in connection with Fig. 1, i.e. sectional loading and serial unloading.
Patent GB-818383-A (GB)
Title: Improvements relating to the launching of objects from aircraft
Inventor: CHAPLIN HERBERT EUGENE
IPC: B64D1/04
Filed: 1955-01-31
Abstract: 818,383. Discharging missiles from aircraft. FAIREY AVIATION CO. Ltd. April 26, 1956 [Jan. 31, 1955], No. 2899/55. Class 9(2) Turbo-jet - driven missiles are lowered from the bomb bay of an aircraft to the launching position by a pneumatic device 18, 31 which starts the turbine 37 of the missile 11 in the launching position. The missile having wings 12 and elevators 13 erected after lowering as in Specification 810,824 is carried by a bomb slip 16 held by a saddle 17 detachably secured to a jack 18 pivoted about an axis 19. A forked link 21 having its base pivoted to the saddle and its outer ends pivoted to the bomb bay prevents fore-and-aft movement of the missile. A bottle 31 of compressed air charged by a compressor driven from the engine, can be connected through a valve 32 to both ends of the jack. When the valve is opened to the lower end of the jack, the missile is held in the retracted position. On reversing the valve the missile moves to the extended position, where a valve 33 can connect the bottle 31 to a nozzle 36 directed on to the turbine blades. The jack 18 comprises a cylinder 41, Fig. 2, in which a piston 42 can slide between two positions determined by notches 54, 64 in the piston rod 43. In the retracted position a plunger 53 is held in engagement with the notch 54 by a spring bearing against a coil 58 is series with a battery 71 and a coil 81 operating the valve 33, the circuit being opened by a switch 63, which closes only when the plunger enters notch 64. To launch the missile, a button 73 is depressed so energizing coils 58, 72 and thereby retracting the plunger 53 and moving the valve 32 to allow air to pass from the bottle 31 to the upper end of cylinder 41. The piston moves downwards until the missile reaches the launching position and the piston depresses a button 66 opening a switch 65 which disconnects the coils 58, 72, from the battery, allows the return of valve 32 to the position in which ports 44, 47 are connected to valve 33 and allows plunger 53 to enter notch 64 thus locking the piston in the lower position. Plunger 53 then closes switch 62 so that coil 81 is energized and moves valve 33 to the turbine-starting position. On closing a switch 82, a coil 83 is energized and opens a valve 49 to allow air to flow to the nozzle 36. When the turbine has reached a sufficient speed, switch 82 is opened to close valve 49 and cut off the air supply. The missile can then be launched by releasing the bomb slip 16 and if this fails the saddle 17 can be released with the missile attached. As the missile leaves, the coupling 35 to the nozzle 36 is released and seals the pipe 34 leading from valve 33.
Patent GB-284587-A (GB)
Title: Improvements in thermionic valve amplifying systems
IPC: H03J3/06
Filed: 1928-01-30
Abstract: 284,587. British Thomson-Houston Co., Ltd., (Assignees of Carlson, W. La V., and Holmes, R. S.). Jan. 28, 1927, [Convention date]. Thermionic amplifiers embody an inter-valve coupling consisting of tuned circuits 15 - - 18 associated with the plate and grid circuits respectively of two valves, 1, 2 and coupled together both inductively as at 14 and by capacity 13, and means are provided for neutralising the interelectrode capacitative coupling of the valves, for example, screening grids 6, or a coil and neutralizing condenser (Figs. 2 and 3, not shown).
Patent GB-1400455-A (GB)
Title: Hydrogenation of aromatics
IPC: C10G45/52
Filed: 1972-01-21
Abstract: 1400455 Selective hydrogenation of aromatics BRITISH PETROLEUM CO Ltd 5 Dec 1972 [21 Jan 1972] 2942/72 Heading C5E Aromatics in a petroleum distillate boiling within the gasoline range are selectively hydrogenated by contacting in the presence of hydrogen and at a temperature of 150-400‹ C. with a catalyst comprising 0À1-5 wt. per cent of platinum, alumina and, initially 4 to 15 wt. per cent fluorine. The feedstocks treated can contain 5-25 wt. per cent aromatics and up to 1300 p.p.m. by weight of sulphur. The feed can be hydrodesulphurized before the selective dearomatization.
Patent GB-791544-A (GB)
Title: Improvements in or relating to electric trigger circuits employing transistors
Inventor: MORGAN LEONARD PETER
IPC: H03K3/286
Filed: 1955-02-01
Abstract: 791,544. Transistor two-stable state circuit. MULLARD RADIO VALVE CO., Ltd. April 13, 1956 [Feb. 1, 1955; June 29, 1955], Nos. 2961/55 and 18871/55. Addition to 767,727. Class 40 (6). In a bistable state circuit of the type described in the parent Specification, a singlepulse input is fed over two parallel channels to two trigger points, one of which is in the feedback loop, a diode gate in each channel being controlled by a steering voltage derived from the bistable circuit, the coupling of at least one channel to the trigger point being of the A.C. type. The bistable state circuit of Fig. 1 operates with one transistor T1 or T2 fully conducting and the other transistor substantially cut-off, the resistance Rx being chosen so that the potential of the emitter e2 is near that of the supply - Ec when T2 is on. Triggering and resetting pulses are fed to terminals bland e1 from the corresponding terminals of Fig. 2 (Provisional Specification 2961/55), the input square wave being differentiated by capacitors C11, C12 and resistors R11, R14. Assuming transistor T1 to be on emitter e2 is near earth and the diode D1 is biased off while substantially no potential exists across the diode D2, negative pulses passing through the latter to reach the transistor T1. With transistor T1 off, transistor T2 is fully conducting with the emitter e2 near the supply potential - Ec. As a result diode D2 is biased off and the negativegoing pulses are passed through diode D1 to the base of transistor T1 to render it fully conducting again. When positive-going pulses are employed the steering network is modified, Fig. 3 (not shown). In an alternative steering network, Fig. 4, the potential is derived from the collector, Fig. 1, by employing a resistor Rc2 connected to a supply - Ec2 of twice the potential of the supply - Ec. The rectangular wave appearing at the electrodes c2, e2 are of opposite sign and bias off in turn the diodes D2, D1, the bias supply for diode D2 being derived from the supply - Ec2. When positive pulses are employed a slightly modified circuit is used, Fig. 5. In Figs. 3 and 5 the capacitors C13 may be omitted due to the small value of D.C. which exists across them. To increase the speed of operation an additional rectifier shunted by a resistor may be connected between capacitor C14 and point e1. In a modification, Fig. 2 (Provisional Specification 18871/55), the resetting channel for transistor T1 consists of a single diode D connected to the collector c1 which acts both to provide the steering voltage and as a trigger point. In a further modification, Fig. 3 (Provisional Specification 18871/55), the triggering channel consists of a diode D11 biased from the collector c2 and supply - Ec.
Patent GB-975757-A (GB)
Title: Improvements in and relating to liners for milking machines
IPC: A01J5/08
Filed: 1961-01-25
Abstract: 975,757. Teat cups. J. H. COOPER. April 9, 1962 [Jan. 25, 1961], No. 2975/61. Heading A1M. The internal and/or external surface of the liner of a teat-cup, at least at a portion 17 housed in the rigid shell 12 of the teatcup, has an elliptical cross-section with the parts of the liner wall at the ends of the minor axis thicker than the parts at the ends of the major axis, the liner also having a deep hood 18 formed as a widening of the liner and terminated by an inwardly directed annular flange 20. As described the external contour of the part 17 is circular and the internal contour merges from an ellipse at the line II-II to a circle at III-III below which the part 17 merges into an extension 19 provided with annular ridges 23 which engage a flange 13 on the shell to hold the liner in tension in the shell. Projections 24 on the extension 19 prevent the liner from falling from the shell when the teat-cup is inverted for washing purposes.
Patent GB-575303-A (GB)
Title: Improvements in apparatus for dressing the grinding wheels of grinding machines
IPC: B24B53/12
Filed: 1944-02-17
Abstract: 575,303. Grinding. RATCLIFFE, W. E. Feb. 17, 1944, No. 2978. [Class 60] Apparatus for dressing grinding- wheels to radius or angular form for use in grinding tools, &c. comprises a slide-way 1, mounted on a base 2 so as to be adjustable thereon about a vertical axis and set by a scale 4, and having adjustable thereon a headstock 5. On the headstock 5 is mounted a head 7, adjustable about a horizontal axis as set by a scale 8, and having thereon a boss 37 in which is rotatable, about an axis at rightangles to the axis of the head 7, a spindle 9 set by a scale 10. The head carries two stops 11 to limit rotation of the spindle to 180‹, the spindle being rotated by a knob 12, which carries a slidable stop pin 13 engageable in a slot 14 in the head to limit rotation of the spindle to 90‹ ; a locking device 15 locks the spindle 9 in adjusted position. Attached to one end of the spindle 9 is a tool holder 16 of square section, having an off-set part 17 with its parallel faces parallel to the axis of the spindle and spaced therefrom at known distances, so as to assist in the setting of a gauge 24. In the end of the tool holder is a V-groove 19 in which is secured, by a cap 21, a diamond tool 22 carrying a diamond point 23, which is set by the gauge 24; the gauge has a stem fitting in a hole 26 in the too] holder and a limit piece 25. In a modification, the tool holder is slidably mounted in a block mounted on the end of the spindle 9 and is movable at right-angles to the axis of the spindle by a pin carried by a crank, the shaft of which extends axially of the spindle and is rotated by a knob, stop screws being provided for centring the slide.
Patent GB-1520065-A (GB)
Title: Treatment of hydrocarbon feedstock
IPC: C10G49/02
Filed: 1976-01-27
Abstract: 1520065 Catalysts for refining oils STANDARD OIL CO 27 Jan 1976 [18 Feb 1975] 03050/76 Heading C5E Sulphur, nitrogen and/or oxygen are removed from a hydrocarbon feed by contacting at elevated temperature with hydrogen in the presence of a catalyst which comprises "amphora" particles which have a substantially spherical shape, a void
Patent GB-381057-A (GB)
Title: Improvements in and connected with packing cases
IPC: B65D25/18
Filed: 1932-02-02
Abstract: 381,057. Packing-cases. PARROTT, H. W. and JACKSON, G., Church Street, Dunstable, Bedfordshire. Feb. 2, 1932, No. 3092. [Class 18.] A packing case for soft fruit, vegetables, flowers, eggs, &c. comprises an outer cardboard, sheet fibre, &c. casing 1 of which the end walls 4 are separately affixed by means of flaps 5, and of which the bottom has preferably a corrugated cardboard or paper lining and an inner structure consisting of four walls 9 spaced from the outer container by extensions 12 and by V-section cardboard &c. strips 14, ventilation holes 16 being provided in both the inner and outer structures. The sheets 9 are formed at their intersections with interengaging slots. A similar sheet 9 with strips 14 may also be arranged on the base. A lid, preferably with a deep edge flange, is also provided.
Patent GB-1534961-A (GB)
Title: Ultrasonic examination
IPC: G01N29/28
Filed: 1976-01-27
Abstract: 1534961 Ultrasonic inspection; focused  probes KRAUTKRAMER GmbH 27 Jan 1976 [27 Jan 1975] 03109/76 Heading G1G [Also in Division H4] In a method of and apparatus for ultrasonic investigation of a body 16, a receiving probe 6, 7, 8 has a focal distance A foc  that is varied in time following the transmission of an investigative acoustic pulse such that at any given time the probe is focused at the particular depth from which reflected pulses are being detected at that time. The focusing may be effected by sequential switching of transducers 7a-d in conjunction with a lens 6 or a concave reflector (37) Fig. 7 (not shown). The transmitter may be incorporated on the probe axis Figs. 5-7 (not shown) and the probe may contact the investigated body directly (Fig. 7). In a further embodiment (not shown) focusing is effected by varying the grouping of transducer rings arranged as a Fresnel lens.
Patent GB-456864-A (GB)
Title: Improvements in or relating to percussive tools
IPC: B25D16/00
Filed: 1936-02-03
Abstract: 456,864. Percussive drills. LEMBKE, H., 1802, Broadway, Seattle, Washington, U.S.A. Feb. 3, 1936, No. 3141. [Class 124] The member 8 carrying balls 12 is rotated by the electric motor 28, 30 through the shaft 10, the member 8 being pressed forward by the spring 25. When the tool 92 is pressed onto the work the balls 12 strike balls 48 and thus transmit blows through the holder 50, anvil block 68 to the tool. The shaft 10 has a splined connection with the member 8 and is supported by a roller bearing 32. The motor is cooled by a fan 33 which draws air in through holes 34 and out through the perforated plate 40. Clearing water is supplied to the tool by pipe 66. The tool is fed by the screw 87 which engages the spring supported nut 86. The chuck 56 is rotated by the interengagement of the balls 8, 48.
Patent GB-942894-A (GB)
Title: Improvements in or relating to frequency demodulation circuit arrangements
IPC: H03D3/08
Filed: 1961-01-27
Abstract: 942,894. Frequency discriminators. PHILIPS ELECTRICAL INDUSTRIES Ltd. Jan. 27, 1961 [Jan. 30, 1960], No. 3256/61. Heading H3A. In a modified Foster-Seeley discriminator, a series tuned LCR circuit 2 is fed by a current i such that quadrature components of magnitude Qi, together with the in-phase current i are fed to a push-pull rectifier arrangement with a push-pull output 10. In Fig. 5, the rectifiers are fed by a T network 12, 13, 14 and the circuit 2 includes two series-connected capacitors 25, 26 whose values are such that the impedances of the capacitor 25 and of the network 3 and 26 are equal at a chosen harmonic of the mean input frequency. In Fig. 7, the rectifiers are replaced by the emitters and bases of PNP transistors 17, 18, and the L/C arrangements of Fig. 5 are transposed to provide a biasing arrangement for a previous NPN driver transistor 35.
Patent GB-105064-A (GB)
Title: Improvements in or relating to the Manufacture of Acetic Aldehyde.
Inventor: DREYFUS HENRY
Filed: 1917-03-06
Abstract: 105,064. Dreyfus, H. March 6, 1916, [Convention date]. Coating.-Apparatus employed in the manufacture of acetaldelyde by passing acetylene into sulphuric acid solutions containing mercury compounds is constructed of or lined with lead, the surface of which is previously coated with a layer of lead sulphate or basic sulphate by treatment with dilute sulphuric acid, alone or in presence of an oxidizing-agent such as nitric acid. The heating or cooling pipes employed in such apparatus or in apparatus made of earthenware or iron faced with stone seats are similarly coated. This coating is resistant to acids and mercury.
Patent GB-725682-A (GB)
Title: Improvements in or relating to the manufacture of ball cages for ball bearings, and ball cages obtained by such manufacture
IPC: F16C33/42
Filed: 1953-02-05
Abstract: 725,682. Bearings. BALL BEARING WORKS J. SCHMIDROOST, Ltd., SCHMID & CO., SUCCESSORS. Feb. 5, 1953 [Feb. 9, 1952], No. 3293/53. Class 12 (1) [Also in Group XXII]. Ball bearing cages of the type which are centred by contact with the outer ball race 4, Fig. 1, comprise annular half-cage members 6, 7, Fig. 2, joined by rivets 8 and having semi-cylindrical ball-socket portions 11 spaced by flat joining faces 10. Flanges 12, Fig. 4, are in bearing engagement with the outer race 4.
Patent GB-1458852-A (GB)
Title: Coating apparatus and method
IPC: B05C5/02
Filed: 1974-01-24
Abstract: 1458852 Slide coating hopper EASTMAN KODAK CO 24 Jan 1974 [26 Jan 1973] 3336/74 Heading D1L The slide surface 32 of a slide hopper, for coating film base with photographic emulsion, is provided with a less inclined lip portion 31 at the lower end thereof. The lip may subtend an angle of Œ5‹ with the horizontal and be chamfered at 34".