baber/WOPTO huggingface dataset:
Patent GB-1450210-A (GB)
Title: Compressors or pumps
IPC: F04B27/04
Filed: 1973-12-21
Abstract: 1450210 Reciprocating compressors W SCHROEDER 21 Dec 1973 59326/73 Heading F1N [Also in Division F2] In an air compressor, employing a pair of plastics pistons 18, the piston-rods 26 are fixed to a synthetic resin crosshead 34, having steel guides 40 and pressure lubricated phosphor bronze bearing bushes 62. A phosphor bronze slide block 38 is carried on a pressure lubricated crank-pin 48. The diameter of the piston may be nearly the same as its stroke and a ring of air intakes 24 is provided, in the wall of cylinder 20, within a housing 22. Air enters the housing through filter 20 on porous plastics filter plate 23. The air-flow through a ring of ducts 29 is arranged to stabilize  the piston and reduce leakage through the gap between it and the cylinder wall.
Patent GB-1377409-A (GB)
Title: Production of maleic anhydride
IPC: C07C51/215
Filed: 1972-12-22
Abstract: 1377409 Oxidation catalyst MONSANTO CO 22 Dec 1972 [27 Dec 1971] 59327/72 Addition to 1377267 Heading B1E [Also in Division C2] A catalyst composition for the vapour phase oxidation of a saturated aliphatic C 4 -C 10  hydrocarbon to maleic anhydride comprises phosphorus, vanadium, iron, chromium, oxygen and one or more of nickel, boron, silver, cadmium and barium. Preferred atomic ratios are P/V=1:1 to 15:1 and Fe/V=0.2:1 to 6:1, with the chromium and other metal(s) present in an amount of from 2 to 25 atomic percent. The composition may be supported, specified carriers being silica gel, alumina, silica-alumina, pumice, kieselguhr, boron phosphate, fuller's  earth, silicon carbide and asbestos. The composition is formed by mixing of the oxides or phosphates or their precursers followed by calcination at 400-600C. The Examples relate to silica-alumina supported compositions containing silver, boron, nickel or cadmium (Ex. 2-6) and an unsupported composition containing barium.
Patent GB-1205870-A (GB)
Title: Improvements in or relating to printing devices
IPC: H01J31/06
Filed: 1968-12-13
Abstract: 1,205,870. Cathode ray tubes. MATSUSHITA ELECTRIC INDUSTRIAL CO. Ltd. 13 Dec., 1968 [18 Dec., 1967; 28 Dec., 1967(2)], No. 59376/68. Heading H1D. [Also in Division H4] A printing device comprises an ink vessel disposed in front of a cathode ray tube (see latter), the ink in the ink vessel being electrically charged by the electron beam of the tube, and a control electrode disposed outside the cathode ray tube which modulates the magnitude of the inks' charge according to an image information signal voltage applied thereto, the amount of ink deposited on a recording paper being dependent upon the potential or the control electrode which depends on the information signal. In Fig. 1 the cathode ray tube 1 has an electron-previous thin film 4 made of for example aluminium foil through which the scanning electron beam passes to charge the ink 6 in vessel 5. The resulting negative charge carried on the ink is modified by a signal voltage on a control electrode 8 interposed between insulating plates 7 and an amount of ink dependent on the signal voltage is attracted by a backing electrode 9 through a line of small holes in vessel 5 on to a recording paper 10. A secondary electron emissive material 15 such as gold may be applied to the thin film 4, the ink being charged by the secondary electrons emitted therefrom when the electron beam passes through the thin film 4 and hits material 15. In a second embodiment, Fig. 3 (not shown) the cathode ray tube comprises an electrostatic printing cathode ray tube having an array of electrically conductive pins in its face plate. In a third embodiment, Fig. 4, the cathode ray tube has a fibre-optics face plate 34 and a light from luminescent layer 33 is transmitted therethrough on to a photo-conductive layer 36 whose resistivity decreases accordingly thereby producing an electric charge which is transferred to ink 37 by a signal voltage applied between layer 36 and an electrode 40 interposed between insulating plates 41, and an amount of ink dependent upon the signal voltage is attracted by the backing electrode 39 on to the paper 38.
Patent GB-1490980-A (GB)
Title: Brushless ac synchronous motors
IPC: H02P25/02
Filed: 1973-12-22
Abstract: 1490980 Excitation circuits for synchronous motors CAV Ltd 22 Nov 1974 [22 Dec 1973] 59677/73 Heading H2A The rotary field winding 19 of a brushless A.C. synchronous motor is energized through a rectifier 18a, 18b, from the secondary winding 17a, 17b, of a rotary transformer 16, the primary 15 of which is energized through an inverter 14 which, together with primary winding 15, is mounted on the motor stator. As shown, the transformer has two secondary windings supplying the field winding through two rectifiers which may be connected in parallel or, as shown, in series. The stator winding 11 is fed from an inverter 12 connected to the same D.C. supply as inverter 14. The inverter 14 circuit, Fig. 2 (not shown), includes thyristors, the firing times of which may be varied to control the field current. The transformer primary winding 15 is preferably mounted in the same slots as the stator winding 11 and the secondary windings are mounted on the rotor poles together with field winding 19.
Patent GB-1255489-A (GB)
Title: Signal processing method in a color transmission system
IPC: H04N1/48
Filed: 1968-12-18
Abstract: 1,255,489. Colour facsimile. MATSUSHITA ELECTRIC INDUSTRIAL CO. Ltd. 18 Dec., 1968 [6 Jan., 1968; 18 April, 1968 (3); 26 April, 1968], No. 60240/68. Heading H4F. Specification describes a colour facsimile transmitter of the type wherein the impure green (G), blue (B) and red (R) colour signals produced by a system of dichroic mirrors 60 and 61 and filter 62 are modulated on to a common carrier, and colour correction, e.g. to remove cross interference, is carried out at 120 on the modulated carriers, the correction according to the invention involving a feedback, Fig. 5, of said carriers via a matrix 54. If the three pure colour contents of the scanned picture 1 i.e. the colour vector Vo are Vo1(R), Vo2(G) and Vo3(B),  then each video signal e13, e23, e33 has undesirable impurity contents resulting from contamination by the other two colours according to formulµ such as e13 = d11 Vo1 + d12 Vo2 + d13 Vo3 e23 = d21 Vol + d27 Vo2 + d23 Vo3 e33 = d31 Vo1 + d32 Vo2 + d33 Vo3 or in matrix terminology  where D is the colour impurity matrix Thus for correcting circuit 120 to reproduce pure colour signals V13, V23, V33 (i.e. V=kVo) from signals e13, e23, e33 its function M must be the inverse matrix 1/D i.e. V=Me. By however making the correcting circuit 120, Fig. 3, in a feedback form, Fig. 5, the resulting feedback matrix 54 has a non-inverse function Mb=kD, thus being much easier to manufacture and set up as since D is unknown, the components giving M or Mb must be set up by trial and error. The matrix 59 of Fig. 6, together with mixer/ amplifier 34 are shown in detail in Figs. 13 and 12 respectively. Matrix output h is produced by combing proportions (as determined by potentiometers R18 and R16) of the blue and green input signals and is thus fed as a subtractive signal to input 6 of the red mixer/amplifier. Tone correcting units 7 comprising amplifiers having non-linear amplitude response characteristics Fig. 9b may be inserted in each amplifier output, on only one such unit may be fed by the amplifiers in succession Fig. 7 (not shown). The feedback matrix may be divided between the amplifiers as shown in Fig. 11.
Patent GB-1371089-A (GB)
Title: Thermionic emitters
IPC: H01J9/04
Filed: 1971-12-30
Abstract: 1371089 Cathode materials and processing ELECTRON EMISSION SYSTEMS Inc 30 Dec 1971 [30 March 1971] 60831/71 Heading H1D A coating composition for forming a thermionic cathode comprises a thermally decomposable alkaline earth oxide precursor dispersed in an organic actinically hardenable binder resin. A mixture of Ba, Ca and Sr carbonates, a thinner and a 1,3-diene photoresist resin containing 4-8 carbon atoms, e.g. polyisoprene containing pendant external double bonds is ball milled for 40 hours. The precursor comprises 40-65% BaCO 3 , 10-40% SrCO 3  and 5-20% CaCO 3  and is 15-75% by weight of the resin. The resulting suspension is sprayed on to a Ni substrate, dried at 85‹ C. and exposed through a mask with circular apertures to harden a pattern in the resin. Unhardened areas of resin and precursor are removed by washing successively with naphtha and acetic acid. If a uniform coating is required a mask is not used. The substrate is dried and heated to 800‹ C. This is lower than for conventional cathodes since BaO is reduced to Ba by carbon from the binder rather than by substrate material. The use of a removable binder results in a porous coating. The cathodes operate at 600‹ C. and may be energized by batteries in space vehicles. They may be used in microwave beam tubes and integrated vacuum circuits.
Patent GB-688275-A (GB)
Abstract: 688.275. Grading machine. BASTOW, J. J., MEERING, R., SHOULTS. N. G., and MEERING, B. F. Feb. 19, 1951 [Feb. 24, 1950; July 25, 1950], Nos. 4852/50 and 18591/50. Class 117 In a fruit grading machine of the type comprising horizontal diverging endless moving belts 16 supported on rigid rails 28, the belts 16 are formed with grooves 50 in their under-faces to engage slidably over the rails 28 so that the flanks of the belts overlie the rail sides. As shown in a machine having two track units 11, 12 separated by a buffered wall 13, the belts 16 are cf rubber with rounded tops and slidably embrace, along their upper runs, inverted T-section rails 28, the belts being positively driven at each end of their run by pulleys 17, 18 and 24, 25 respectively. The fruit, which may first pass along a picking belt beside the grader for hand removal of defective fruit, is deposited on an inclined ramp 39 which feeds it on to the belts 16 to be conveyed therealong until it falls through onto a belt 22 which is arranged below the grading aperture and diverges vertically therealong until it falls through on to a ensures that all fruit is graded according to its largest diameter. The graded fruit falls into the appropriate padded tray 32 the floor of which slopes laterally to a counter-poised pivoted door having a lip 37 for engagement by a collecting bag to open the door. At the end of the grading run, the belts 22 extend beyond the belts 16 and a comb-like ramp 40 engaging between the belts 22 directs the fruit remaining on the belts to a tray 41. The first Provisional Specification states that the support rails 28 may be mounted to provide adjustment of the horizontal grading aperture and that the belts 16 may be of plastic material.
Patent GB-734951-A (GB)
IPC: D01H5/26
Abstract: 734,951. Drawing mechanism. SKF KUGELLAGERFABRIKEN GES., [formerly VEREINIGTE KUGELLAGERFABRIKEN AKT.-GES.]. Nov. 18, 1952 [Nov. 30, 1951], No. 29153/52. Class 120(2). A double apron drawing mechanism comprising a carrier arm for the top rollers which reaches over the drafting field and may be swung upwardly about a pivot is characterized by the provision of a top cradle, for guiding the top apron, which is pivotable in relation to the carrier arm through an angle smaller than 90 degrees when the arm is swung upwardly, rests against a top roller shaft and also bears against a relatively stationary portion of the drawing mechanism. As shown top aprons 75 are arranged on a cradle, Fig. 4, consisting of two side pieces 76 for each apron and guide bar 79. At their front bottom end the side pieces 76 are provided with catches 766 by means of which they engage an angle iron 85 fastened to the bottom apron guide bar 83. The side pieces 76 are also formed with saddle shaped recesses 761 which engage the shaft 35 of the pair of top rollers 36. When the arm 31 is swung upwards about its pivot, the top rollers 36 travel with it and take the rear portion of the cradle with them. Since, however, the front portion of the cradle is still engaged with the angle iron 85 it turns about the shaft 35 until such time as the catch 766 disengages from the angle iron 85. When the arm 31 is swung downwardly again the catch 766 automatically engages with the angle iron 85 again. In a second embodiment a spring clip is used instead of the catch 766.
Patent GB-2000118-A (GB)
Title: Dustfree cutting of a mineral wool web
IPC: B26D1/15
Filed: 1978-06-20
Abstract: A process for cutting of a mineral wool web without creating dust as associated with known processes involves cutting with a knife blade (2) which has a peripheral speed in the direction of the movement of the mineral web (1) which is somewhat higher than the velocity of the web. The knife blade (2) has an edge (3) of such a form that it has a cleaving effect as opposed to having teeth which remove chips or particles. <IMAGE>
Patent GB-2001402-A (GB)
Title: Control valve assemblies
IPC: B60T8/30
Filed: 1978-07-03
Abstract: A known control valve assembly for connection in, for example, a brake pressure line to the rear wheel brake of a vehicle comprises a control valve (2) which, after a predetermined inlet pressure has been attained, modifies the pressure passed to an outlet chamber (8) connected in use to the rear brakes. Such known assemblies have the problem that during release of inlet pressure, expansion of the outlet chamber is insufficient to reduce rear wheel braking at the same rate as it increased. In an embodiment of the invention, a brake proportioning valve assembly, the outlet chamber (8) is connected through an auxiliary valve (14,15) to an auxiliary chamber (12), the auxiliary valve opening when the inlet pressure is released to allow pressure fluid to pass from the outlet chamber (8) to the auxiliary chamber (12) to permit the rear brake pressure to reduce at a greater rate than normal. <IMAGE>
Patent GB-2003211-A (GB)
Title: Sinking cased boreholes
IPC: E21B7/20
Filed: 1978-07-06
Abstract: A rock drill bit, which is particularly suitable for drilling bores of a large diameter in ground containing boulders or rock strata, comprises a body which carries at its drilling end a number of cutters some of which are movable from inner positions in the body to the outer positions in which they will, when the drill is operated within a casing, cut a bore of a diameter which is greater than the outer diameter of the casing. In use this drill bit is lowered into a cylindrical casing with the movable cutting members in their inner positions until they are below the lower end of the casing, after which they are moved outwardly into their cutting positions, so that they will then cut a bore of a diameter which is at least equal to the outer diameter of the casing. During drilling, at least through rock, the drill bit is advanced and oscillated or rotated at the same speed and as a single unit with the casing. <IMAGE>
Patent GB-2003076-A (GB)
Title: A device for throwing a lump into a mould for manufacturing handformed bricks and the like
IPC: B28B13/02
Filed: 1978-07-18
Abstract: The device has a supply conveyor 16 from which the lumps of clay 23 fall into the moulds 3. In order to guide the lumps as they fall, without distorting them undesirably, there are pairs of rollers 11, 12 and 13, 14, one pair above another. The lumps fall between the two rollers of each pair, whose peripheries are moving downwardly adjacent the path of fall of the lumps with a speed corresponding to the speed of fall of the lumps as they pass the rollers. In this way, the lumps are guided into the moulds. <IMAGE>
Patent GB-2030110-A (GB)
Title: Cassette-shaped support for milk samples
IPC: B01L99/00
Filed: 1978-09-26
Abstract: A support 1 with milk receiving reservoirs 2 consists of a rectangular block of metal or plastics material. The reservoirs 2 consist of hollow cylinders extending perpendicular to one of the faces of the block and terminating in a narrow aperture 3 extending through such face. Each cylinder contains a piston 4 which is a close fit therein. <IMAGE>
Patent GB-2006302-A (GB)
Title: Trench-Jetting Apparatus
IPC: E02F5/10
Filed: 1978-09-29
Abstract: Trenching tools are disclosed for underwater trenching operations. The tools have elongate tubular members 2, 31 which are provided with nozzles 4 from which water jets are directed at the bed material in which the trench is being cut. The jets displace bed material for cutting and/or keeping open the trench. <IMAGE>
Patent GB-2032538-A (GB)
Title: Radial shaft sealing rings
IPC: F16J15/32
Filed: 1978-10-20
Abstract: A radial shaft sealing ring, consists of a support ring 1 with an angular cross-section, and a lip 2 which is connected with the support ring and can yield resiliently in the radial direction, the lip 2 having two frusto-conical surfaces 3, 7 which meet to define an annular sealing edge 8, while on one 3 of the conical surfaces there is a plurality of dynamically effective ribs 5 each with a bounding face 6 close to an imaginary cylindrical surface containing the sealing edge 8 and with an edge directed inwards, characterised in that the edges of the ribs and the surfaces of the bounding faces 6, in the unstressed condition of the lip, have an increasing spacing from the axis of rotation of the sealing ring with increasing distance from the sealing edge 8, and that the bounding faces 6 are spaced, as at b, from the sealing edge 8. <IMAGE>
Patent GB-2016383-A (GB)
Title: Tire-pressure alarm system and wheel unit therefor
IPC: B60C23/04
Filed: 1978-11-21
Abstract: A tire pressure alarm system includes a plurality of wheel units each comprising an antenna (152) for transmitting signals when the tire pressure is correct (no signal or an insufficient signal being transmitted when the tire is over or under inflated), said antenna being located within the tire cavity; and attachments on the annulus, for respectively receiving and transmitting a signal (202), generating power (122), and sensing tire inflation pressure or gas mass (102), said attachments preferably being in a substantially symmetrical arrangement and having substantially similar weights for proper balancing the unit during rotation of the tire; and electrical interconnections between the attachments on the one hand and the wire of the antenna on the other hand. The power generator (122) may be replaced by means on the vehicle body for transmitting power to the wheel unit via antenna (152) or a separate antenna. The system further includes a receiving circuit which indicates when a wheel unit is not transmitting a sufficient signal and may indicate which wheel unit it is. <IMAGE>
Patent GB-2017981-A (GB)
Title: Synchronizing a digital and an analogue display in a timepiece
IPC: G04B19/24
Filed: 1979-03-28
Abstract: In a timepiece having an electro- mechanical analogue display (hour and minute hands driven by a step motor) and also an electronic digital display for giving other information, a signal generator (LED 6) and a detector (photocell 7) are so arranged in relation to an element (wheel 5) coupled to the analogue display as to produce periodic signals for synchronizing the digital to the analogue display. As described the wheel 5 is turned by hour wheel 3 and its aperture 8 causes a signal to be generated at midnight. The signal is used to ensure that a digital date display is synchronized with the hands, especially after replacing the timepiece battery. Use in an alarm timepiece is also envisaged. <IMAGE>
Patent GB-2019628-A (GB)
Title: Programmable key utilizing a liquid-crystal display and methods for operating the key
IPC: G02F1/13
Filed: 1979-03-28
Abstract: A programmable key for displaying messages to an operator so as to draw the operator's attention actively to the key is presented. The key carries a liquid-crystal display 23 for showing at least one message on the key according to the program chosen, means for creating messages on the liquid-crystal display and means for enabling the liquid-crystal display to be translated from one position to another position. In typical operation, the liquid-crystal display is initially activated to show a message at the key's neutral position. When the key 13 is depressed the liquid-crystal display automatically reactivates to show a second message. At either position, the key may show a blank screen by appropriate energization or de-energization of the liquid- crystal display. <IMAGE>
Patent GB-2018638-A (GB)
Title: Self-centring chuck
IPC: B23B31/167
Filed: 1979-04-03
Abstract: The chuck includes clamping jaws operable by means of a drivable ring gear (15) which is in mesh with a driving pinion (18) for turning the ring gear, and with further driving pinions (20) for rotating spindles (13) operatively associated with each clamping jaw. The ring gear is turnable by means of a clamping motor (19) a disconnectible coupling (21) being provided in the drive from the motor to the ring gear. <IMAGE>
Patent GB-2022011-A (GB)
Title: Agricultural Balers
IPC: A01F15/04
Filed: 1979-05-29
Abstract: An agricultural baler having a bale case (2) and a plunger (19) mounted for reciprocation within the bale case and having an open box structure. Preferably the plunger (19) is die cast from aluminium and is provided with rollers (36), (37) which engage guide surfaces on the bale case. The plunger may be provided with recesses (23), (26), apertures (32), a knife (33) and a member (34) for closing the feed opening in the bale case when the plunger is at its full throw position. <IMAGE>
Patent GB-2028267-A (GB)
Title: Pallet
IPC: B65D19/38
Filed: 1979-06-21
Abstract: For ease of handling, favourable space requirement and resistance to stresses, a pallet (2), used for example for storing metal scaffolding elements, and comprising a frame having sides (21) and, at each corner of the frame, a respective foot (22) and optionally a respective upright (23), is provided on at least two parallel sides, at respective corners, with respective hooks (1), each said hook (1) being curved, in one plane, through an angle exceeding 270 DEG  and having an end part and a central part which are connected respectively to said foot and said side (21) so that central longitudinal axes through the foot (22) and the side (21) lie in the same plane as the hook (1) or in a plane parallel thereto. Similar hooks (1) can be similarly arranged between each foot (22) and the other two parallel sides. <IMAGE>
Patent GB-2029797-A (GB)
Title: Tree Felling Jack
IPC: A01G23/099
Filed: 1979-06-22
Abstract: A manually operated jack for use in tree felling comprises an elongated manually operable lever 1 having in the region of one end a foot 2, a pressure plate 3 hinged 13 to said foot and a pressure element 4 connected in spaced relation to said pressure plate 3 and foot 2 by two links 5, 6 pivotally interconnected with said pressure element 4 at one of their respective ends 7, the other of the respective ends of the links being respectively connected to said foot and said pressure plate. Raising the lever 1 causes the foot 2 to pivot in relation to the first pressure plate 3. The associated links 5, 6 raise the second pressure element 4 which bears against the tree sawcut consequently felling same. The pressure element 4 shown may be replaced by a plurality of toothed or roughened rollers (11 Figs. 4-6). <IMAGE>
Patent GB-2031716-A (GB)
Title: Curtains
IPC: A47H15/04
Filed: 1979-09-07
Abstract: In a curtain assembly an elongate stiffening member (33) is so arranged as to ensure that the curtain folds in a predetermined manner. The stiffener may comprise stiff regions alternating with less stiff regions (35) (which form hinges which fold in zig-zag concertina fashion. The stiffening member (33) may be threaded into a hem (38) at the head of a curtain, and is attached to a curtain track (11) by runners (15, 16, or 40, 42). A chain 29 secured to the runners determines the spacing between folds of the zig-zag stiffening member 33, which constrains the curtain to hang in predetermined folds. <IMAGE>