baber/WOPTO huggingface dataset:
Patent GB-1531242-A (GB)
Title: Splash plate feed assemblies for aerials
IPC: H01Q19/13
Filed: 1975-01-21
Abstract: 1531242 Aerials POST OFFICE 21 Jan 1976 [21 Jan 1975] 2580/75 Heading H4A A rear feed assembly for a microwave aerial comprises a support member 2, Fig. 1, formed of dielectric material and having first and second faces 4, 8, waveguide means 1 coupled to said member 2, the centre 5 of an aperture at the end of said waveguide means 1 being a feed phase centre of the assembly, and a "splash-plate" reflector 3 positioned against the face 4. The relative locations of the feed phase centre and of the reflector are such that the reflector is located in the far field region with respect to the feed phase centre, and the shaping of the first and second faces of the support member are such that waves from the reflector emerging from said second face are spherically shaped, centred on an image phase centre. As described, the waveguide means 1 is a circular waveguide, the support member 2 is made of polyethylene, the first face 4 is plane, and the reflector 3 is a circular metallic disc. The distance between the phase centre 5 and the face 4 is not less than 8a<SP>2</SP>/# e  (a = radius of waveguide mouth, # e  = wavelength in the support member 2). The diameter of the reflector 3 is about four times said distance. The image phase centre 6 behind the reflector 3 is at the same distance from the face 4 as is the feed phase centre 5. The second face 8 of the member 2 is spherical, and is centred on said image phase centre 6. Rays from the reflector 3 pass normally through the face 8, and irradiate a paraboloidal main reflector. In a second embodiment, the image phase centre is nearer the reflector face than the feed phase centre, the second surface of the dielectric material support member being specially shaped to provide such additional deflections in the reflected rays that they all appear to come from said image phase centre (Fig. 2, not shown). The distribution of energy over the face of the main reflector may thereby be controlled, to achieve higher aerial gain and reduce "spillover". In a third embodiment, the first face of the support member and the reflector are of generally conical form. The second face of the support member is so shaped that all reflected rays appear to come from the image phase centre (Fig. 3, not shown). For matching purposes, a cylindrical or conical recess may be provided in the centre of the first face of the support member and a corresponding protuberance, or an adjusting screw, may extend thereinto from the reflector (Figs. 7, 8, not shown). A matching arrangement between the waveguide means and the support member is shown in Fig. 4. A circular waveguide 12 carries a brass insert 13 having an internal diameter which is less than that of the waveguide, i.e. not less than 0À586# e  and preferably within the range 0À65# e  to 0À95# e . Into said insert is fitted a rod-like extension 9 from the support member 2, which is terminated in a tapered portion 11.
Patent GB-1419850-A (GB)
Title: Coupling for well completion equipment
IPC: E21B34/16
Filed: 1973-05-04
Abstract: 1419850 Pipe couplings McEVOY OILFIELD EQUIPMENT CO 4 May 1973 2589/75 Divided out of 1419849 Heading F2G A coupling providing for case of connection between a fluid pressure valve control line 69 carried by a tubing head 11 of subsea well completion equipment, the head having a radial bore 310 therethrough, and a passage 61 in a well head tubing hanger 43, in which the bore 310 and passage 61 may be slightly misaligned on assembly of the head 11, comprises a conduit 302 connected to the line 69 and screwed into the passage 61 by means of tapered screw threads 304, 306, the bore 310 being larger than the external diameter of the conduit 302 so as to permit bending of the conduit therein. A rubber ring 326 surrounds the conduit 302 within a counterbore 312 in the head 11, the ring being compressed by a nut 330 bearing on a ring 334 and the rubber ring 326 being contained by two rings 322, 324 which allow for movement of the conduit within the head 11. A collar 342 on the conduit 302 will prevent blowout of the conduit if the screw connection with the passage 61 breaks and will assist in disassembly of the rubber ring packing when required. The Specification also discloses well head completion equipment as in the parent Specification 1,419,849 (see Division E1).
Patent GB-228008-A (GB)
Title: Improvements in and relating to alternating current generators
IPC: H02K17/42
Filed: 1924-01-31
Abstract: 228,008. Contell, F. Jan. 31, 1924. No Patent granted (Sealing fee not paid). Exciting. - Relates to alternating-current generators which are excited by alternating current. It is explained in the Specification that when the frequency of the exciting current is equal to a quarter of the product of the number of poles and the revolutions per second of the rotor, the generated current has the same frequency so that the machines may be connected for self-excitation; the speed of the rotor is twice the speed of the rotating magnetic field and in the opposite direction thereto whether the field magnet or armature rotate. According to the invention, the field-magnet winding is given a larger number of turns than the armature winding. An auxiliary alternator is required to supply the initial exciting current, and the continuous current for exciting this machine may be introduced from an external source or may be obtained from the armature of the machine itself, which is then provided both with slip-rings and with a commutator. The auxiliary alternator may be separately driven, but is preferably mechanically connected to the main alternator either by being mounted on the same shaft, or by means of toothed gearing or a chain drive. When the machines are rigidly connected together, the arrangement is such that the product of the number of poles and revolutions per second of the main machine is equal to twice this product for the auxiliary machine. When the main alternator attains the proper speed for self-excitation, the auxiliary alternator is disconnected. Fig. 3 shows an arrangement of two alternators M<1>, M<2>, having their stators connected to bus-bars 1, 2, 3 through switches S<1>, S<2>, the rotors being supplied with exciting current from the same bus-bars through a transformer T<1>. The auxiliary exciter A feeds the bus-bars through a transformer T<2>, or it may be connected to separate bus-bars. Specification 195,423 is referred to.
Patent GB-1176201-A (GB)
Title: A Device for Distributing Agricultural Material
Inventor: WEISTE HEINRICH
IPC: A01C15/04
Filed: 1967-01-18
Abstract: 1,176,201. Fertilizer and seed distributers. H. WEISTE. 18 Jan., 1967 [22 Jan., 1966; 20 April, 1966; 5 Nov., 1966], No. 2609/67. Heading A1D. A device for distributing agricultural material from a container 23 by entraining it in an airstream includes a fan 24 for supplying an air stream to a conveyer pipe 32, an inlet into the pipe 32 from container 23, the inlet being down-stream of the fan, and a distribution tube 27 which is connected downstream of the inlet to pipe 32 and which is vertical in use, tube 27 having a distribution head 20 which includes a plurality of pipes 12 for distribution of material from the head.
Patent GB-304740-A (GB)
IPC: B65G27/00
Filed: 1929-01-25
Abstract: 304,740. Maschinenfabrik Halbach, Braun, & Co., Ges. Jan. 25,1928, [Convention date]. Jigging conveyers. - In a jigging conveyer in which the supporting rollers on one side are independent of those on the other side, each roller comprises two rollers M, N connected by a short shaft O. The rollers are guided by a strap P which engages between them and is attached to a frame F provided with openings G, H to receive projecting lugs C, D on adjacent trough sections A, B. The lug D may be of circular crosssection.
Patent GB-440594-A (GB)
Title: Improvements in or relating to the colouration of textile materials
IPC: D06P1/34
Filed: 1935-01-26
Abstract: Mordant dyes, dyeing with; cellulose esters or ethers, dyeing; printing.--Textile materials made of or containing cellulose esters or ethers are coloured by applying thereto a natural dyestuff capable of being fixed by afterchroming and thereafter chroming in a chromate bath containing one or more of the following assistants, viz. oxalic acid, an oxalate, an alkali metal sulphite or ammonium thiocyanate. The materials, so coloured in pale shades, may be coloured in dark shades by topping with another dyestuff.  Specified natural dyestuffs are logwood, haematein, fustic, young fustic, quercitron, Persian berries, weld extract, sandalwood and cutch.  The shades of the dyeings may be varied or their fastness improved by incorporating with the natural dyestuffs, metal compounds such as magnesium sulphate, calcium chloride, calcium hydroxide, lead acetate or calcium acetate.  Delustring agents, such as titanium dioxide or antimony trioxide, present in the materials may also modify the shade.  The following examples are specified: (1) A cellulose acetate material is dyed blue-grey by treatment for 1 hour with a logwood solution at 80 DEG  C. followed by treatment for \ba1/2\be hour with a solution at 60 DEG  C. containing sodium bichromate and sodium oxalate; the dyeing may be topped with a direct dye or with logwood or other natural dyestuff; a deep black dyeing may be obtained by topping with a mixture of yellow, orange and red dyestuffs having affinity for cellulose acetate; (2) A mixed natural silk-cellulose acetate material, delustred with titanium oxide, is dyed a greenish black by immersing for 1 hour in a solution at 80 DEG  C. containing logwood and cutch, followed by chroming in a bath containing sodium bichromate and sodium oxalate; (3) A cellulose acetate fabric is dyed a deep delustred black by treatment for 1 hour with a logwood solution at 80 DEG  C. followed by rinsing, chroming for \ba1/2\be hour with a solution at 70--75 DEG  C. containing sodium bichromate and sodium oxalate, rinsing and scouring with soap.  A table is also given showing the shades, ranging from light grey to deep black, obtainable on a cellulose acetate woven fabric with various strengths of logwood solution at 80 DEG  C. and various strengths of sodium bichromate solution at 60 DEG  C. containing oxalic acid.  The application to printing is exemplified by the printing of an aqueous paste containing haematein, glycerol and glucose, British gum or gum tragacanth upon a mixed fabric containing a cellulose ester or ether and silk, the printed fabric being steamed, chromed with a solution containing sodium bichromate and sodium oxalate, rinsed and soaped.
Patent GB-1088884-A (GB)
Title: Machine tool control apparatus
IPC: B23Q15/00
Filed: 1965-01-21
Abstract: 1,088,884. Machine tool positional control. ZAVODY PRESNEHO STROJIRENSTVI GOTTWALDOV, NARODNI PODNIK. Jan. 21, 1965 [Jan.31, 1964], No.2685/65. Heading G1N. An apparatus for automatic positional setting of a carriage 1 (Fig. 2) of a numerically controlled machine tool comprises elements for coarse and fine setting, the fine setting element including a potentiometer 22 the wiper 21 of which is rotated, via a shaft 16, by the moving mechanism of the tool carriage, and the potentiometer is connected in a bridge circuit, including resistors 34, 35, fed from a stabilized D. C. source U. The bridge unbalance output, resulting from the angular position of the wiper 21, is fed to an amplifier 39 which is selectively connected either to an amplifier 46 feeding the tool carriage drive 47 or to a meter 51 for initially zeroing the system, so that in operation the drive continues until the bridge is balanced. The carriage should then be in a position determined by a numerical control equipment (not described) with an accuracy to the nearest millimetre. If accuracy to 1/100th m. m. is required a second potentiometer 41 is connected to the bridge by the closure of switch 40' and the opening of switch 40. The bridge will again be unbalanced and the drive 47 will again move the carriage and the wiper 21 until the bridge is balanced. The potentiometer 41 wiper position is adjustable manually in correspondance with an appropriate indicating scale. The moving mechanism of the carriage 1 comprises a revolving screw 2 in a fixed nut 3 which screw is coupled to a coarse positional setting arrangement including contact discs 4, 5, 6. Disc 4, which measures decimetre lengths of carriage displacement from a position preselected by a programme control, is geared to the contact disc 5 which measures centimetre lengths and is in turn geared to the contact disc 6 serving for millimetre length measurement. An output shaft 7 of the contact disc 4 is coupled via gears 9, 10 and a clutch 14, 15 with the drive shaft 16 of the wiper 21. The operator first coarsely sets the carriage to a programmed position the attainment of which is signalled by a lamp (not shown), and the deflection of meter 51 should be substantially zero. The potentiometer 22 is then adjusted until the meter 51 reads zero and the system is then ready for automatic fine adjustment. The potentiometer, 22 is a continuous ring comprising one turn of resistance wire, and the wiper has unlimited angular movement.
Patent GB-631161-A (GB)
Title: Improvements in or relating to rotary honey extractors
IPC: A01K59/04
Filed: 1948-01-29
Abstract: 631,161. Centrifugal honey extractors. MOUNTAIN GREY APIARIES, Ltd., and HEATON, G. Jan. 29,1948, No. 2734. [Class 23] In a rotating cage built up of end plates 1, 2, and connecting bolts a<SP>1</SP>-a<SP>4</SP>, such as described in Specification 631,160, locking rods 36, 37 are provided to extend across the tops of honey-comb frames h to prevent the frames being ejected under centrifugal force. The rods may be connected together by a handle 38, and retained in position by a spring clip 47. Alternative holes in the side plates may be used by the rods where different-sized combs are used. When the rods are in the withdrawn position they prevent the rotation of the cage. A third rod, slidable in a guide tube, may have a part bent at right angles and attached to the rods 36, 37. The ends of the rods 36, 37 may be slightly bent to resist extraction from the holes in plate 2 during rotation of the cage.
Patent GB-395279-A (GB)
Title: Improvements in or relating to the buckets of bucket ladder dredgers
IPC: E02F3/14
Filed: 1933-01-28
Abstract: 395,279. Bucket dredgers. TEMPLETON, J., Temoh, Perak, Malay States. Jan. 28, 1933, No. 2759. [Class 68 (i).] In a bucket dredger with the buckets directly connected by coupling pins, the front eye of each bucket has on one or both sides a diametral recess 3 adapted to receive the T- or L-head of the coupling pin so that the pin may be angularly reversed whereby opposite areas of the pin may be exposed alternately to wear.
Patent GB-899107-A (GB)
Title: Improved arrangement for setting indexing devices in article sorting systems
IPC: B65G47/48
Filed: 1960-01-26
Abstract: 899,107. Conveyers for delivering articles at predetermined positions; letter sorting systems. AMALGAMATED WIRELESS (AUSTRALASIA) Ltd. Jan. 26, 1960 [March 23, 1959], No. 2769/60. Class 78 (1). In apparatus for sorting documents or other articles, the articles are conveyed to a predetermined destination by carriers 12, each of which consists of a pair of plates arranged to grip the article and between the upper edges of which are pivoted a number of selector elements 13 having angularly disposed arms 141, 14r. The destination of each carrier is determinecLaccording to the setting of the elements 13, each of which can be moved into either of two limiting positions 16L, 16R or remain in a central position 17 (Fig. 6). The setting of the elements is effected by means comprising fixed guide members 18 which centralize the elements to positions 17, followed by angularly adjustable arms 20 pivoted at 20a and each adjustable by locating an associated arm 22 in an appropriate slot in a plate 19, the arms 22 engaging the respective elements to move them into one or other of the limiting positions 161, 16r. In a modification, Figs. 7, 8, the arms 22 are set automatically in accordance with a computer or by depressions of keys in an electrical keyboard which results in the selective energization of a series of solenoids 36 each acting on a spring-loaded plunger 27 carried by respective arm 22, followed by energization of a solenoid or equivalent device 37 to displace a slide 34. The energization of one or more of the solenoids 36 withdraws one or more of the pins 27 from engagement with apertures 33 in the slide and engages them with apertures 35 in a plate 26 so that the respective arms 22 are locked in the central position, whilst operation of device 37 displaces the slide to move the remaining arms 22 into one or other of the two limiting positions, the device 37 being selectively energizable for this purpose. Specification 886,386 is referred to.
Patent GB-450872-A (GB)
Title: Improvements in and relating to cam-operated electric switches
IPC: H01H9/02
Filed: 1935-01-28
Abstract: 450,872. Heavy - current switches; switchboards. BRITISH THOMSONHOUSTON CO., Ltd., Crown House, Aldwych, London. Jan. 28, 1935, No. 2782. Convention date, Jan. 29, 1934. [Class 38 (v)] The movable contact 7 is pivoted to a lever 2 connected to a lever 1 which carries a camroller 6 co-operating with a cam 5 on a shaft 4. The lever 1 passes between a pair of strips, as 3, of sheet iron provided with an insulating covering which may be formed by moulded material pressed round them. The various switch parts are attached to the strips 3, and the strips of a number of switches may be mounted on a frame 9 to form a switching plant.
Patent GB-1332883-A (GB)
Title: Injection moulding
IPC: B29C44/04
Filed: 1972-01-20
Abstract: 1332883 Injection moulding IMPERIAL CHEMICAL INDUSTRIES Ltd 20 Jan 1972 [28 Jan 1971] 2813/72 Heading B5A An injection moulding machine comprises first and second injection units for first and second materials 11 and 21, each unit comprising an injection ram 15, 25 in an injection barrel 10, 20 and a feed channel 13, 23, the feed channels being connectable to each other and to a common sprue channel 3, control means to control the position of the ram in the second injection unit in dependence directly or indirectly on the amount of first material injected, and limiting means to limit the flow of the second material up the feed channel 13 of the first material during injection of the second material. The control means may be responsive to (i) the position of the first ram 15, or (ii) the time elapsed since commencement of injection of the first material, or (iii) the pressure exerted on the first material by the ram 15. The machine may be used for injection moulding articles having a sandwich structure in which a skin of one material 11 is first injected and then a core material 21, which may be foamable, is injected so as to be enclosed by the skin material. The invention reduces contamination of the skin material by the core material. A pump 4 supplies hydraulic fluid through valves 110, 210 to cylinders 17, 27 containing pistons 16, 26 connected to rams 15, 25 respectively. An accumulator 114 is connected to the cylinder 17 for the skin material injection unit. Pump 4 normally operates continuously, a relief valve 6 returning fluid to a reservoir 5 when the pressure exceeds a certain limit. When injection of skin material is commenced, the sprue end of the core material feed channel 23 is filled with skin material 121 (Fig. 1). This may be brought about by injecting a further quantity of skin material after injecting the core material. Thus during injection of core material a collar 119 on skin injection ram 15 engages a limit stop 120 which can subsequently be retracted to allow a further injection of skin material. Alternatively the further injection of skin material may be effected by rotation of the screw 12. Injection of core material may be commenced before injection of skin material is completed and the time of 'overlap' may be varied at will from nil to nearly the total skin material injection time.
Patent GB-911026-A (GB)
Title: Improvements in or relating to respiratory diving apparatus
IPC: B63C11/24
Filed: 1961-01-24
Abstract: 911,026. Respiratory appliances. DRAGER, O. H., [trading as DRAGERWERK, H. & B. DRAGER]. Jan. 24, 1961 [Jan. 25, 1960], No. 2836/61. Class 81 (2). In underwater breathing-apparatus inhalation gas is supplied to the user at a pressure greater than the ambient pressure on his chest but exhalation takes place against a pressure lower than the pressure on his chest. A mouthpiece I is connected by an exhalation pipe 10 through a valve 2 and carbon dioxide absorber 3 to an expansible chamber 4 and by a pipe 11 through a valve 7 to a similar chamber 6. The chamber 4 is mounted higher than the user's chest so as to be subjected to a lower ambient pressure, while chamber 6 is situated below the chest. Consequently inhalation takes place from the higher pressure chamber 6 while exhalation is into the lower pressure chamber 4 and the air is continuously passed back from the latter to the former by a motor-driven pump 5. Opening and closing of the valves 2, 7 are performed by suitable pressure-sensitive diaphragms. In a modification, the expansible chambers are mounted adjacent each other but are loaded by springs to give the desired result.
Patent GB-607249-A (GB)
Title: Improved means for making connections between electric cables
IPC: H01R4/02
Filed: 1946-01-29
Abstract: 607,249. Direct connections between conductors. BRITISH INSULATED CALLENDER'S CABLES, Ltd., and BLACKBURN, R. Jan. 29, 1946, No. 2874. [Class 38 (i)] A joint between light multi-core cables 1, 2 incorporates an insulating disc 6 provided with holes 1a ... 1d, 2a ... 2d for the passage of insulated conductors 11a ... 11d, 12a ... 12d, and having notches a, b, c, d which receive the bared ends 4 of the pairs of conductors to be connected together. Conductors to be joined are passed through adjacent holes in the disc from opposite sides and then bent outwardly across the faces of the disc, the joint being accommodated in the corresponding notch. A branch connection, Fig. 5 (not shown), can be effected by passing the branch wires between the cores forming the straight-through joint, and bending them back into the notches where the branch connection is made. The joint may be protected in sealing compound or in a joint box.