baber/WOPTO huggingface dataset:
Patent GB-1224549-A (GB)
Title: Improvements in and relating to two-terminal semiconductor devices
Inventor: OXLEY TERENCE HUNTER
IPC: H01L23/051
Filed: 1968-06-14
Abstract: 1,224,549. Semi-conductor devices. ASSOCIATED SEMICONDUCTOR MFRS. Ltd. 14 June, 1968, No. 28466/68. Heading HlK. A semi-conductor diode is mounted in an inner housing comprising an insulating tube sealed between two end pieces connected to the diode, a pin extension supported wholly by one of the end members being arranged coaxially within an outer conductive tube which surrounds the inner housing and is connected to the second end member. As shown, Fig. 3, a point contact diode subassembly 2 comprises an insulator 4 of aluminium oxide brazed to end pieces 5, 6 of titanium or zirconium. An N-type germanium wafer 3 is secured to the end of a rod 8 which is inserted into and brazed to end piece 6, and a point contact whisker 9 is secured to a rod 7 which is inserted into end piece 5 adjusted to obtain the desired diode characteristics and brazed. One end of the sub-assembly 2 is then secured to a mounting member 11 which is force fitted into a silver plated brass tube 1 and the other end is provided with a pin extension member 10, 10<SP>1</SP>, also of silver plated brass. The diode subassembly 2 can be mounted with either polarity. In a modification, Fig. 4 (not shown) one of the rods carrying the point contact and the wafer protrudes through the end member and is shaped so that it also provides the pin extension member. The diode sub-assembly for this arrangement may be manufactured with both of the rods (7, 8) protruding through their respective end members (5, 6), Fig. 5 (not shown), the external part of one rod being removed when the polarity of the diode has been selected. The mounting member (11) may be in the form of a split collet which initially fits loosely round the end of the end member (6) but grips firmly when it is force fitted into -the outer tube (1), Fig. 6 (not shown).
Patent GB-778631-A (GB)
Title: Frames for spectacles or other eyewear
IPC: G02C1/06
Filed: 1954-10-05
Abstract: 778,631. Spectacle frames. RAPHAEL, O. P.' Oct. 4, 1955 [Oct. 5, 1954], No. 28605/54. Class 97(1) A spectacle frame has a rim portion- 14 bounding a lens 15 and provided with an outwardly facing groove 16 around the whole of its periphery, which groove lies substantially in the same plane as the periphery of the lens. The groove is intended to receive detachable decorative members such as are described in Specification 727,003. The edge of the lens may be grooved to receive the curved rim portion 17 or be bevelled to engage a groove formed in the inner surface of the rim.
Patent GB-478842-A (GB)
Title: Improvements in light valves
IPC: H04N5/66
Filed: 1936-10-21
Abstract: 478,842. Light valves. I.M.K. SYNDICATE, Ltd., and GODDARD, M. J. Oct. 21, 1936, No. 28620. [Class 40 (iii)] In a light valve comprising a transparent cell containing a liquid traversed by mechanical waves induced by electrical means, the beam of light is directed vertically through the cell instead of horizontally. In order to provide an upper plane surface, unaffected by evaporation, the top of the cell is enclosed by a transparent material and the cell is kept full by means of a header tube placed on one side. In a modification, the header tube is mounted on the side opposite to the wave source in such a way that the waves are reflected upwards into the header tube after traversing the cell. This is done by inclining the face of the cell on which the waves impinge.
Patent GB-242460-A (GB)
Title: Means for utilizing exhaust gases as part of the charge in internal combustion engines
IPC: F01N5/00
Filed: 1924-12-01
Abstract: 242,460. Heffernan, M. Dec. 1, 1924. Exhaust, dealing with; charge, moistening; induction pipes, fittings for. - Apparatus for supplying washed and humidified exhaust gases to the induction pipe comprises a water receiver 1, provided with an exhaust inlet pipe 4 secured to the cover 2 and carrying perforated baffle plates 9. The exhaust gases are admitted to the pipe 4 through a cock 4b, and a perforated nozzle 5 mounted in the exhaust manifold 6. The receiver is provided with a vent pipe 8, which may be located inside the pipe 4, a gauge 10, a filling orifice 3. outlet cocks 11, 13, and also with water inlet and outlet cocks 7<a>, 12<a> operable from a distance by connections 7<c>, 12<b>. The moistened exhaust gases from the space 14 pass to the induction pipe 20 through perforations of gradually increasing size in a pipe 15 which are controlled by a piston valve operated from a distance by a connection 18; in the extreme open position of the valve, air is admitted to the pipe 15 by an orifice 21.
Patent GB-818744-A (GB)
Title: Etching
IPC: C23F1/42
Filed: 1957-09-12
Abstract: 818,744. Etching. DOW CHEMICAL CO. Sept. 12. 1957 [Sept. 28, 1956], No. 28761/57. Class 100(2) A method of etching magnesium, zinc, or magnesium- or zinc-base alloys comprises repeatedly impinging on the surface thereof an etching liquid comprising (1) 1-25 per cent nitric acid, (2) 1-12 per cent of a water-immiscible organic liquid unreactive with the nitric acid, and (3) 0.4-2.0 per cent of a water-soluble, anionic, surface-active half ester of sulphuric acid containing at least one hydrophobic group of 10-26 carbon atoms in an uninterrupted chain, and containing at least 8 per cent sulphation, i.e. of the maximum amount of sulphuric per molecule. (1) The preferred range is 4-12.5 per cent. (2) Examples are gasoline, benzene, kerosene, coal oil. lubricating oils (i.e. petroleum fractions boiling at 70- 390‹C), turpentine, perchlorethylene, diethylbenzenes, tetramethyl-benzenes, isopropyl benzene, carbon tetrachloride. The preferred range is 5-8 per cent by weight. (3) Examples are sulphated tall oil, sulphated castor oil, sulphated sperm oil, sulphated tallow, sulphated propyloleate, alkylarylpolyether sulphates, sulphated amides, sulphated alcohols, sulphated coconut and olive oils, and the monoglyceride ester of coconut oil sulphate. The nitric acid is present in aqueous solution. Etch factors of over 10 are readily obtained and etch factors up to 100 are not unusual, Specification 725,110 is referred to.
Patent GB-728692-A (GB)
Title: Improvements in or relating to the assembly of thermionic valves
Inventor: SMYTH JOHN ARUNDEL
IPC: H01J19/46
Filed: 1952-11-14
Abstract: 728,692. Thermionic valves. STANDARD TELEPHONES & CABLES, Ltd. Nov. 14, 1952, No. 28763/52. Class 39 (1). A method of assembling a thermionic valve in which the ends of a number of electrodes and/or support wires are guided into their respective positions in an electrode assembly by the serrated edges of two arms 8, 9 as they are moved towards each other, is characterized in that at least one side of each of the projecting portions of the serrated edges is at an angle to the direction of movement of the respective portion, and the two arms are bevelled so that they may overlap in order to position the electrodes and/or support wires. The electrodes may be inserted into a bottom spacer, the free ends of the electrodes are then assembled as described above, and the top spacer is then placed in position. Preferably at least one of the arms 8, 9 is pivoted at one end.
Patent GB-1434114-A (GB)
Title: Detector-equalizers dor use with multimode optical fibres
IPC: H01S5/00
Filed: 1973-06-18
Abstract: 1434114 Semiconductor photodetectors WESTERN ELECTRIC CO Inc 18 June 1973 [20 June 1972] 28764/73 Heading H1K A photodetector adapted for use with a multimode optical fibre compensates for distortions produced in the fibre as a result of differential delay times for the various modes by arranging that the drift time of carriers generated in the detector by the faster propagating modes exceeds that of carriers generated by the slower modes. The embodiment uses a circular P-doped n-type Si platelet 30 with a central contacted n<SP>+</SP>-type zone 31 and concentric annular contacted zones 32, 33 of p and n<SP>+</SP>- types respectively. The radius R of the two zones 32, 33 (approximately equal) and the separation A of the detector from the end of the fibre (fixed, for example, by embedding both elements in potting material-see Fig. 4, not shown) are arranged so as to satisfy the equation R = # max  A, where # is the maximum illuminated cone angle from the fibre end; i.e. the cone angle defined by the slowest propagating mode. In the absence of incident light from the fibre voltage source 37 reverse biases the pn-junction between zone 32 and the platelet, and source 38 causes a current to flow through the platelet between zones 31 and 33 in an electric field whose strength is inversely proportional to the distance from the platelet centre. This non-uniform field supplies the condition needed to provide the differential outward drift times for positive holes generated in the platelet in response to the various modes from the fibre, each of which modes illuminates a different circle on the platelet. The drifting holes are collected at zone 32 and hence contributes to a current through load 37. The electrons generated simultaneously in the platelet are collected at central zone 31 and do not contribute to the load current.
Patent GB-504041-A (GB)
Title: Improvements in and relating to plasticized haloformed rubber compositions
IPC: C08L21/00
Filed: 1937-10-21
Abstract: 504,041. Rubber compositions. STANDARD OIL DEVELOPMENT CO. Oct. 21, 1937, No. 28782. Convention date, Dec. 18, 1936. Addition to 479,498. [Class 70] A composition comprises haloformed rubber, defined as a rubber-like product or derivative made by treating rubber with one or more of the halogen compounds boron fluoride, fluoboric acid and chlorostannic acid, and an iso-olefine polymer having an average molecular weight of above 30,000, e.g. polyisobutylene prepared as described in the parent Specification, or hydrogenated rubber. Curing or vulcanizing agents, accelerators, antioxidants, fillers &c. may be incorporated in the mixture which may be submitted to a curing or vulcanizing treatment. In an example, 50 parts of polyisobutylene of about 80,000 average molecular weight are dissolved in carbon tetrachloride with 50 parts of a haloformed rubber prepared by the reaction of rubber with chlorostannic acid, and the mixture is precipitated out of solution by means of alcohol. In another example 90 parts of the same polyisobutylene is milled with 10 parts of haloformed rubber and pressed into a sheet.
Patent GB-706764-A (GB)
Title: Process and apparatus for improving heat exchanges
IPC: B64D33/10
Filed: 1949-11-10
Abstract: 706,764. Windows. FAVRE, A. Nov. 10, 1949 [Nov. 15, 1948], No. 28812/49. Class 20 (3). [Also in Group XIII] The Specification as open to inspection under Sect. 91 comprises a window or windscreen in which the lower part of a rotating transparent disc moves in an enclosing- casing through which a heating fluid passes, so that the upper exposed part is de-misted. Sealing "rubbers" f<SP>1</SP>, f<SP>2</SP> are provided at the top of the casing. This subject-matter does not appear in the Specification as accepted.
Patent GB-395907-A (GB)
Title: Improvements in and relating to welding apparatus
IPC: B23K9/28
Filed: 1932-10-15
Abstract: 395,907. Uniting by fusion. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.- (General Electric Co. ; Schenectady, New York, U.S.A.) Oct. 15, 1932, No. 28848. [Class 83 (iv).] A gas, metallic-arc, or gas-arc welding-machine comprises a carriage traversed relatively to the work and provided with means for effecting a discontinuous oscillating movement of the welding carriage or of a nozzle mounted thereon in the line of the weld. Predetermined lengths of seam may thus successively be first prepared for welding, such as by preheating, or burning off galvanizing by the welding head during the oscillating movement and then welded during the traverse of the carriage. A welding electrode, which is automatically fed from a reel, passes through a nozzle 19 pivoted at 20 to the welding carriage 12, which is traversed at constant speed by a motor 13 through worm and chain gear 14. To the nozzle is attached a bell crank 21, which is held by a spring in contact with a cam 24 on a shaft 25 rotated by worm and spur gear from a motor 27. The cam is shaped so that the parts from a to c oscillate the electrode quickly forwards and backwards along the line of the seam to effect the preliminary operation whereupon the part from c to a traverses the electrode at slightly greater speed than that of the carriage so as to effect the weld. The point c is nearer to the centre of the cam than the point a so as to allow for the traverse of the carriage during the preliminary operation. Cams of various forms may be used to vary the oscillating movement. This movement may be communicated to the carriage.
Patent GB-1431808-A (GB)
Title: Brake unit for braking a shuttle in a loom
IPC: F16D71/00
Filed: 1973-06-18
Abstract: 1431808 Checking gripper shuttles SULZER BROS Ltd 18 June 1973 [20 June 1972] 28853/73 Heading D1E A prior art gripper shuttle checking motion of Figure 2, wherein a brake block member 3 is pushed down by a toggle 6, 7, 8 to brake the shuttle, has the provision of an integral swell 31 which has a surface 15a to contact the top of the shuttle 12, sides 19a to contact opposite sides of the shuttle, guide cheeks 18a to guide the shuttle into contact with the surfaces 15a, 19a, relief holes 35 and a relief gap 34 and upwardly extending sides 31 which engage the member 3. Securing screws 13 may be provided, side relief channels 37 (Figure 5, not shown) may be provided and the upwardly extending sides 31 may be replaced (Figures 6 and 7, not shown) by a centre flange engaging side members fixed to the member 3. Braking is adjustable (Figure 1) by a screw 9 acting on the block 3.
Patent GB-175243-A (GB)
Title: Improvements in guides for the type bars of typewriting machines
IPC: B41J25/22
Filed: 1921-10-31
Abstract: 175,243. Krupp Akt.-Ges., F. Feb. 9, 1921, [Convention date]. Aligning for impression.-Relates to aligning- guides for type-lever machines, of the kind in which lugs on the type-heads enter with slight clearance a guide-slot, and consists in providing lugs a<2>, Fig. 2, and a guide-slot b<1> of arcuate form. The arrangement improves the alignment since the permissible lateral deviations of the type-levers A, determined by the clearance h, is uniform for all the type-levers. Specifications 2205/07, 4265/07, and 4069/15 are referred to. The Specification as open to inspection under Sect. 91 (3) (a) describes an arrangement in which the guide-slot b<1>, Fig. 2 (Cancelled), consists of a vertical part, and inclined parts that are parallel to the extreme type-levers when in the impression position, the type-levers A being provided with a lug a<2> of the same. shape as the guide-slot; the middle and extreme type-levers have equal clearances h<1>, h<2>, h3 respectively, which clearances are slightly less than the clearance h<4> of an intermediate type-lever. This subject-matter does not appear in the Specification as accepted.
Patent GB-473805-A (GB)
Title: Improvements in ammunition
IPC: F42B10/16
Filed: 1936-02-19
Abstract: 473,805. Cartridges ; projectiles. FEDERAL LABORATORIES. Feb. 19, 1936, No. 28870. Convention date, Dec. 11, 1935. Divided out of 473,754. [Class 9 (i)] A round of ammunition for firing from a smooth bore gun comprises an ogival shaped projectile 10, Fig. 1, with expansible flight stabilizing vanes 14 longitudinally pivoted on the base of the projectile and capable of contracting sufficiently to enter the case 50 of the cartridge forming part of the round of ammunition, said cartridge having a flanged base 16 and being extended longitudinally to contain a propellent charge 54 as well as the vanes 14 and to have a substantial overlapping frictional engagement with the rear end 27 of the projectile. This rear end 27 is preceded by a shoulder 28, Fig. 3, and is spun into a groove 32 of a base block 12 after the projectile has been filled. A fuze 48 is fitted in the centre of the block 12, and the spindles 36 of the vanes 14 are also attached to this block. The vanes have a curved or angular cross-section and springs 42 are provided to swing the vanes out when the projectile leaves the gun. Bombs and projectiles with more or less similar tail vanes are described in Specifications 362,381, 375,517, and 376,216. The body of the projectile and its charge are as described in Specification 473,819 and the propellent cartridge as described in Specification 473,754.
Patent GB-209516-A (GB)
Title: Metal tube bending machine
IPC: B21D7/022
Filed: 1922-10-24
Abstract: 209,516. Wood, L. Oct. 24, 1922. Angular bending. - A tube-bending apparatus comprises a fixed circular, grooved former 1 on the axis 3 of which is pivoted an arm 6 carrying a grooved bonding-roller 2. The roller spindle 4 is adjustable on the bending arm to accommodate different rollers. A grooved pin 5 secured in the base plate 8 serves as an abutment for the tube. Reference has been directed by the Comptroller to Specification 146,576.
Patent GB-889544-A (GB)
Title: Contact assembly for an electrical relay
IPC: H01H50/54
Filed: 1959-08-24
Abstract: 889,544. Electromagnetic relays. BENDIX CORPORATION. Aug. 24, 1959 [Sept. 10, 1958], No.28876/59. Class 38 (5). A bridging contact which is insensitive to vibration is normally held against a first pair of fixed contacts by a strong spring acting against a weaker spring and is moved away from the first contacts, to engage a second pair of fixed contacts, by the weaker spring when the strong spring is rendered inoperative by operating means. In the electromagnetic relay shown the fixed contact pairs 30, 31 and 36, 36 are secured in an insulating plate 20, preferably of sintered glass, and the bridging contact is a circular disc 37 movable on a stem 39 also secured to the plate 20. A strong spring 41 acts between the head 42 of the stem 39 and an insulating sleeve 44 and urges the sleeve, a rocking washer 45 and the disc 37 against the fixed contacts 30, 31. When the armature 46 engages flanges 47 on the sleeve 44 and moves it downward so that the force of the spring 41 no longer acts on the disc 37, the latter is moved downward by a weaker spring 40 until it bridges contacts 35, 36. The circular armature 46 operates four contact sets and is normally biased away from the poles 17, 18 of the electromagnet by a spring 56 so that the head 54 of a pin 49, secured to the centre of the armature, is centred in a sleeve 50 secured to the plate 20. The coil 15 has a core 16 carrying the pole 18 and is enclosed in a magnetic case 14 in which the annular pole 17 fits. The annular gap between the poles 17, 18 is recessed at 52 to accommodate the lower ends 42 of the stems 39. The case 14 is welded to a metal ring 19 in which the plate 20 is formed and the assembly may be sealed after evacuation and filling with an inert gas through a tube 57.
Patent GB-413632-A (GB)
Title: Process for producing chlor-hydrocarbons
IPC: C07C17/02
Filed: 1932-10-15
Abstract: Chlorhydrocarbons, especially tetrachlorethane are produced by treating with chlorine, preferably in presence of catalysts such as iron, a dilute acetylene mixture containing much hydrogen.  The gas mixture may be produced by heating methane to 1000 DEG  C. for about ,01 of a second at one tenth of an atmosphere pressure, but gases containing also carbon monoxide and nitrogen are also mentioned.  The chlorination may be effected at 200 DEG  C.  In an example 90 per cent of the acetylene was converted into tetrachlorethane.
Patent GB-464636-A (GB)
Title: Improvements in or relating to galvanic cells or electrical accumulators
IPC: H01M10/36
Filed: 1935-10-21
Abstract: 464,636. Batteries. CENTNERSZWER, M., KWIATKOWSKI, K., and SZPER, J. Oct. 21, 1935, No. 28939. [Class 53] An accumulator having an acid electrolyte is provided with electrodes consisting respectively of cadmium or a metal covered with cadmium, and a conductor such as graphite surrounded by a higher oxide of one or more metals of the fifth or sixth groups of the periodic classification mixed with graphite or other conductor. In an example the oxide of the cathode consists of molybdic trioxide and is used with a cadmium anode in sulphuric acid.
Patent GB-702532-A (GB)
Title: Improvements in or relating to centrifugally-operated electric switches
Inventor: WITT FREDERICK HARRY
IPC: H01H35/10
Filed: 1950-11-27
Abstract: 702,532. Centrifugal switches. WOODALLDUCKHAM VERTICAL RETORT & OVEN CONSTRUCTION CO. (1920), Ltd. Nov. 27, 1951 [No. 27, 1950], No. 28961/50. Class 38(5) In a centrifugal switch, a pair of levers 36, 37 are pivoted at 35 on a rotating support 30 and move outwards under centrifugal force to bring contacts 58 into engagement with contacts 40; alternatively the contacts 58 may be fixed in the dotted position 58<SP>1</SP> in which case increase of speed moves them away from contacts 40. The levers 36, 37 may be linked by a centrally pivoted link 54 so as to move outwards simultaneously and a quick movement is ensured by spring pressed balls 52 in the levers 36, 37 engaging recesses in the support when the levers are in their innermost position. Springs 45 act in opposition to the centrifugal force to bias the levers inwards. Current is led to the contacts 40 by means of a slip ring or similar member.
Patent GB-176832-A (GB)
Title: Improvements in and relating to panoramic attachments for cameras
IPC: G03B37/02
Filed: 1920-10-13
Abstract: 176,832. Orme, W. H. Oct. 13, 1920. Panoramic cameras.-In an attachment for a camera provided with clock-work to rotate the camera and wind the film for taking panoramic photographs, a graduated tape is wound from one spool to another to indicate the amount of film exposed, and means are provided for re-winding the tape to re-set the attachment. The camera 14, Fig. 1, is mounted between two flanged plates 11, 13, which turn on a standard 1 secured to the tripod head 2 and having an extending shaft 19, the latter passing through the plate 13 and being clamped to the standard 1 by the slot. ted head 4 and screw 5. The shaft 19 carries a wheel 21, Figs. 1 and 4, round which a small cogwheel 22 rolls when a photograph is being taken, thus rotating the camera round the standard 1. The film-winding key 27 is rotated by clock-work mechanism which also rotates a drum 29 on which the graduated measuring-tape 24 is wound from a spring drum 26 to indicate the length of film exposed. The tape 24 passes over a large drum 28 on the cog-wheel 22. The spring clock-work drum 40 and driving-gear is mounted between two plates 15, 17, the spring drum being wound by the key shaft 41. In use, the camera is turned on the tripod head to the extreme angular position of the view to be taken and the main driving-wheel 42 of the spring drum released from the dog 58. The gearing shown in Fig. 5 drives two shafts 30, 55, the former being keyed to the tape drum 29, and the latter carrying a winding-head 57 engaging the film winding key. The cog 22 rolling on the wheel 21 and thereby rotating the camera is indirectly driven by the tape 24 which passes over the drum 28. The tape is preferably perforated to engage sprockets on the drum. To enable the tape to be re-wound on the spring drum 26, the drum 29 is freely mounted on the shaft 30 and normally keyed thereto by a pin 30<a>, Fig. 6, but can be released by a lever 33 on the plate 13.