baber/WOPTO huggingface dataset:
Patent GB-818122-A (GB)
Title: Improvements in or relating to frequency selective wave coupling systems
IPC: H01P1/213
Filed: 1957-07-19
Abstract: 818,122. Filters; waveguide couplings. WESTERN ELECTRIC CO Inc. July 19, 1957 [Aug. 17, 1956], No. 22926/57. Class 40 (8). Two electromagnetic microwave transmission. lines of different and predominantly imaginary propagation constants are disposed parallel and adjacent one another and coupled together; one line being capable of carrying a broad frequency spectrum with several spaced bands of interest, and there are provided means for coupling the two lines and further means for equalizing the respective imaginary portions of the propagation constants, so that one only of said bands is coupled between the lines whilst coupling of the other bands is inhibited by making the propagation constants of the second channel real for these bands. A first waveguide 11 of circular cross-section is directionally coupled to the second waveguide 12 of rectangular cross-section by a plurality of coupling apertures 15 in a common wall 14. A series of equally spaced reactive elements in the form of identical metallic rods 13 extend transversely across the guide 12 in the region of the coupling apertures: the spacing therebetween being equal to half a wavelength of the middle frequency of the lowest of the uncoupled bands. The permeability of the rods 13 is a function of the pass band frequency fi and the spacing of the rods results in the formation of stop bands fj, fk in which the propagation constants of guide 12 is real and coupling between the guides is prevented.
Patent GB-295330-A (GB)
Title: Improvements in or relating to thermionic valves
IPC: H01J21/20
Filed: 1928-08-08
Abstract: 295,330. Allgemeine Electricitõts- Ges. Aug. 9, 1927, [Convention date]. Vacuum tubes. - A multiple valve has indirectly-heated cathodes C with heaters A which are supplied with alternating current and insulated from the cathodes, the leads to the heaters being as short as possible so as to reduce capacity coupling with the other elements. The valve shown has a detector stage and a two-stage resistance-capacity coupled amplifier mounted in a single envelope.
Patent GB-260557-A (GB)
Title: Plastic composition and method of making the same
IPC: C04B28/14
Filed: 1926-09-18
Abstract: 260,557. Haggerty, J. F. Oct. 27, 1925, [Convention date]. Compositons containing plaster and fibres. - Finely divided fibrous material such as paper or wood pulp is intimately mixed with water to form a flocculent mass; plaster of Paris or dehydrated gypsum is added to form a paste, and the mixture is moulded or sheeted. The proportion of fibrous material is preferably 5-8 per cent by weight of the plaster of Paris, and it must not exceed 50 per cent thereof. Specification 255,037 is referred to.
Patent GB-492885-A (GB)
Title: Improvements in the manufacture of plastering material
IPC: C04B11/02
Filed: 1937-08-12
Abstract: A mixture of hydrated lime and hemihydrated calcium sulphate is prepared by hydrating quicklime admixed with dihydrated calcium sulphate in a closed system under such conditions that the dihydrate is converted into the hemihydrate while the lime is hydrated.  Water or steam is added to the mixture to initiate the reaction and the proportions of dihydrated calcium sulphate and lime are so adjusted that the calcium sulphate supplies the remaining water necessary for hydration.  The process may be carried out in batches in a closed vessel, or as a continuous process in a chamber with sealed entrances and exits.
Patent GB-211521-A (GB)
Title: An improved speed multiplying and/or reducing gear
IPC: F16H13/06
Filed: 1922-08-28
Abstract: 211,521. Garrard, C. G. Aug. 28, 1922. Friction gearing having rollers and races with engaging surfaces A, B, Fig. 6, curved in planes containing the main gear axis. Axial pressure F is applied to produce the necessary binding action by distortion of the engaging surfaces, the rollers and races being so constructed and arranged that there is no clearance but that after the pressure is applied the angles which the normals C-E, at the centres of the contact areas, to the surfaces in contact make with a plane C-D at right angles to the main axis do not exceed 10‹. The rollers and races are preferably formed in two or more hardened steel parts. Concave surfaces 7, Fig. 1, on the drying-shaft 1 are engaged by doubly-curved planet-rollers 12 carried in a cage 8 secured to the driven shaft 2..Races 15, 14 carried in the stationary oil-containing casing 3 are pressed by springs 17 into engagement with the rollers 12. The surfaces 7 or the rollers 12 may be divided and pressed apart by springs, or, as shown in Fig. 5, the number of engaging surfaces may be multiplied, the outer race 14 being subdivided and pressed to binding position by compression springs 28.
Patent GB-176814-A (GB)
Title: Automatic electric direction indicator for motor vehicles
IPC: B60Q1/42
Filed: 1921-03-23
Abstract: 176,814. Bennett, T. W. March 23, 1921-. Illuminated stencil and transparency indicators.-In a box at the rear of a vehicle are three lamps, the outer ones being red and the centre green. On turning to the right, the centre and one side light glow, on turning to the left, thecentre and the other side light. Pressing a. button causes both side lights to light together.
Patent GB-258871-A (GB)
Title: Improvements in or relating to stoves utilising gaseous or liquid fuels
IPC: F24C1/08
Filed: 1926-09-21
Abstract: 258,871. Naamlooze Vennootschap Technische Bureau voorheen Nell en Stutterheim. Sept. 23, 1925, [Convention date]. Burners, adjusting. - The luminous-flame burner 6 of a gas-fire may be adjusted horizontally by means of an adjusting device with a setscrow 8.
Patent GB-711123-A (GB)
Title: Method of making engine rocker arm
IPC: F01L1/18
Filed: 1952-09-17
Abstract: 711,123. Making valve rocker arms. LEAKE, J. M. Sept. 17, 1952, No. 23305/52. Classes 83 (2) and 83 (4) A method of making a valve rocker arm for an internal-combustion engine consists in forming a blank 5 from a length of preformed metal strip 1 having a flat mid-section 2 and rounded edge portions 3 and 4, forming a vertical aperture 13 in the end 7 of the blank and threading said aperture to receive a contacting bearing 19 (Fig. 10), piercing a horizontal aperture 6 in said blank, forming a plurality of notches 9 around the periphery of said horizontal aperture on each side of said blank, inserting a tubular hub member 15 in said horizontal aperture and upsetting said hub member adjacent both sides of the blank to form annular flanges 16 and simultaneously upsetting said hub into the notches on each side of the blank. In operation the blank 5 is stamped from the preformed metal strip 1 and at the same time the aperture 6 is pierced in the blank. The vertical aperture 13 is formed by first pressing indentations 10 and 11 in the rounded end 7 of the blank and then piercing the end through the indentations. Similarly, an oil passageway 18 is formed above the aperture 6 by first making an indentation 12 and then piercing. A tubular bushing or bearing 17 is pressed into the hub member 15. Alternatively, the hub and bushing may comprise a steel tubular member having a coating of bearing material on the inside. The under surface 21 of the rounded end 8 of the rocker arm is flame hardened to resist wear. Specification 528,997 is referred to.
Patent GB-776421-A (GB)
Title: Improvements relating to centrifugal governors
IPC: G05D13/08
Filed: 1955-08-12
Abstract: 776,421. Speed governors; transmitting mechanism. ABEL, M. Aug. 12, 1955 [Sept. 10, 1954], No. 23307/55. Class 57. A centrifugal governor comprises a carrier disc 4 incorporating holes inclined to its axis of rotation and containing slidable, cylindrical fly weights 5 terminating in conical surfaces 6 which roll on a plate 7 centred on the axis of rotation, the motion of the plate being transmitted against the action of springs 21, 25 to an engine throttle 17 or other speed control device. The lower ends of the weights 5 rest on a spring-loaded ring 9 mounted on the carrier disc 4 which receives a ball joint 11 on the plate 7. This plate has a pin 13 engaging a transverse bore in a shaft 12 pivotally mounted on a lever 14 which is pivoted at 15 to the governor casing 1. The movement of the plate 7 is at first resisted only by the spring 21 until at high speeds the lost motion in a link 19 is taken up and the lever 14 is additionally loaded by a spring 25. Two stops 23, 24 control the tension of the springs 21, 25. Fig. 4 shows an arrangement in which two levers 27, 28 are used to produce a change in mechanical advantage when the spring 25 comes into action. The lever 27 first moves the lever 28 through a spring 34 which is compressed when the lost motion in the link 19 is taken up so that the shaft 12 bears on the lever 28 at a point B and the effective pivot of the lever is shifted from 29 to 30. The weights 5 may be drilled longitudinally to reduce their weight or they may be made from a heavy metal, such as lead. The disc 4 may be made from synthetic plastic material. The governor may control a fuelinjection pump.
Patent GB-233593-A (GB)
Title: Improvements in pumps actuated by hydraulic pressure
IPC: F04B9/107
Filed: 1924-10-02
Abstract: 233,593. Knoch, W. Oct. 2, 1924. Actuating by liquid pressure ; buckets ; singleacting suction-valveless bucket pumps ; singleacting bucket pumps.-A pump actuated by the pressure of a head of water comprises a cylinder a and a piston c open on its upper surface to the pressure of the high-level water and carrying an air-chamber e and tube d, which slides watertight on a fixed tube b opening into a delivery pipe i. During the downstroke, the space in the cylinder a below the air chamber e is connected by a rotatable valve n to the low-level water, and at the end of the downstroke this valve is operated by the piston c by means of a rod with stops y, z and a liquid-pressure servo-motor t, u, v to connect this space to the high-level water, so that the upstroke is effected by the buoyancy of the air-chamber. During the upstroke a valve h in the piston opens and permits high-level water or other liquid conveyed by a pipe to the valve to pass into the tube d, and during the downstroke the valve closes and this liquid is forced through the pipe i and valve k. In another form, the pump is situated under the low-level water, the air vessel is dispensed with, the liquid to be pumped enters the tube d through the pipe i provided with a non-return valve, and the pipe r communicates with the high-level water.
Patent GB-1049808-A (GB)
Title: Machine for loading pallets with containers
IPC: B65B35/50
Filed: 1964-06-05
Abstract: 1,049,808. Pallet loading machines. HOLSTEIN & KAPPERT MASCHINENFABRIK PHOENIX G.m.b.H. and KUMAG A.G. MASCHINENFABRIK. June 5, 1964 [July 10, 1963], No. 23345/64. Heading B8C. Apparatus for stacking articles on pallets comprises article in-feed means to a collecting station where a layer of articles is formed and drawn on to a reciprocating carriage operating above a pallet lift, the carriage withdrawing to strip the layer on to the pallet or on to a previous layer on the latter, the pallets being fed in from the bottom of a stack in a magazine. Crate feed.-Articles, e.g. crates, are fed in by roller conveyer sections 40, 41, 43 to the collecting station 45 under crate operated switch control means. Provided the station 45 is completely empty, as soon as three crates have been fed into the section 43 they are passed, on to the station 45, a stop 44 rising behind them. In the station 45 they are thrust to one side by a pusher 47. The stop 44 descends and three further crates enter the station 45. The stop 44 rises, the necessary distance between the third and fourth crates being obtained by speed differences between the sections 41, 43. The six crates how pass on to a platform 49 and a reciprocating plate 8 pulls them on to a carriage 50 stationed above a pallet lift. Pallet feed and loading.-A stack of pallets is periodically raised with the next but lowermost pallet gripped by means 53 allowing the lowermost pallet to be moved in to the loading station along rollerways 54, 55. The pallet depresses a switch 23, thus stopping the track 55 causing the stack of pallets to be lowered and the grippers 53 to be withdrawn. The empty pallet moves on to a lifting platform 51 which rises at high speed to a limit switch 79 and then at a reduced speed to a position below the carriage 50 which it lifts and lowers under limit switch control to position accurately relative to the carriage. The carriage 50 moves out of the loading station, stripping means causing the crates to drop on to the pallet. The platform 51 is lowered, the carriage 50 advances again and is refilled with six crates and the above process is repeated until the pallet.is full, when it is discharged along roller tracks 56, 57, 58. A system of switches ensures that not more than one pallet at a time is on the roller track 58. General.-The lowering of the platform is controlled by photo electric means, the beam of which is interrupted by articles on the pallet. Selected stack heights are likewise obtained by the photo-electric means and co-operating limit switches.
Patent GB-427693-A (GB)
Title: Improvements in closuring device for vacuum flasks
IPC: A47J41/02
Filed: 1934-08-13
Abstract: 427,693. Stoppers for vacuum flasks. ALBONS, A. E., Henriksbo, J÷nk÷ping, Sweden. Aug. 13, 1934, No. 23349. Convention date, Dec. 23, 1933. [Class 125 (iii)] A stopper for a vacuum flask has a cork, &c., packing element 4 at its lower end, and a gasket 5 at the upper end. The element 4 engages a contraction 17 in the neck of the flask and the gasket 5 the outer edge thereof. The flask and stopper have cooperating screw-threads.
Patent GB-337785-A (GB)
Title: Improvements in or relating to electrical methods of and means for detecting, measuring and recording changes in physical conditions or properties of materials and the like
IPC: G01R27/02
Filed: 1929-07-30
Abstract: 337,785. Dowling, J. J., and Sommerville, K. S. G. July 30, 1929. Gauging-apparatus.-Movements of parts of a measuring device of any sort such as an enginebalancing, machine, balance, extensometer, &c., or variations in the physical state of a material such as tobacco are measured by their effect on the capacity of a condenser which is rapidly charged and discharged so as to affect a galvanometer, telephone &c. in alternation with some standard device, the arrangement being such that the resultant indication of the galvanometer can be brought to zero by adjusting the standard device or a " trimming condenser," the capacity of the condenser being thus measured independently of voltage changes in the circuit. In the arrangement shown in Fig. 1, the test condenser Ct and standard condenser Cs are so arranged that they are alternately thrown into the oscillating circuit of a valve 1 by a vibrating contact 10 operating at from 200 to 500 cycles per second. The anode current of the valve 1 passes through telephones 6, a filter-device 9 being provided to cut out all disturbances except those arising from want of balance in the condensers Cs and Ct. When the capacities of the condensers are equal no sound is heard in the telephones, and if they are unequal silence can be produced by adjusting a condenser Cs in parallel with the condenser Ct, the adjustment necessary giving the capacity of the condenser Ct. The telephone 6 can be replaced by a. galvanometer in which case the condensers Cs, Ct are discharged through the galvanometer in opposite directions by means of a vibrating switch. An arrangement of this kind is described in which the switches are operated by cams on a rotating shaft, the arrangement being such that the switches for charging the condensers are closed for a longer time than those for condensing the valve circuit to the galvanometer circuit and these again for a longer time than a switch controlling the galvanometer circuit; the galvanometer is provided with a shunt resistance. In the arrangement shown in Fig. 4, the condensers Cs<1>, Ct<1> are charged to the same potential by a battery 14 and then discharged in opposition to each other to the grid of the valve 1, so that no charge is imparted to the grid unless the condensers are of equal capacity. The valve may be dispensed with and the opposed condensers discharged directly through a galvanometer.
Patent GB-974850-A (GB)
Title: Speech recognition system
Inventor: WRIGHT ESMOND PHILIP GOODWIN
IPC: G10L15/00
Filed: 1963-06-12
Abstract: 974,850. Speech recognition. STANDARD TELEPHONES & CABLES Ltd. June 12, 1963, No. 23397/63. Heading G4R. In a speech recognition system each recognition signal is adapted to send back to the speaker a spoken indication of the word recognised. The microphone 1, Fig. 1 and the speaker 2 may be parts of a telephone hand-set. The microphone signal 5 passes to the recognition circuit 3 and a recognition output 6 causes the corresponding word, recorded e.g. on a magnetic drum in unit 4, to be returned on line 8 to the ear-piece. The recognition signal may also be stored and passed on to further apparatus under the control of the operator if the word returned is correct. The recognition circuit 3 consists of a bank of parallel filters dividing the signal with frequency bands and a timing circuit using the beginning and ending of words and pauses between syllables to derive timing pulses. A further circuit receiving the outputs of the frequency filters and the timing pulses recognises word elements and a recognition circuit compares the resulting combination of word elements with stored combinations to recognise the word. The apparatus also serves to train operators to speak the words in a manner suitable for machine recognition.
Patent GB-1467042-A (GB)
Title: Process for the polymerization of ethylene
IPC: C08F10/02
Filed: 1974-05-24
Abstract: 1467042 Ethylene polymerization in bulk SNAMPROGETTI SpA 24 May 1974 [15 June 1973] 23477/74 Heading C3P Ethylene is polymerized in the presence of a catalyst comprising a transition metal compound and an aluminium compound AlR x X 3-x  where R is hydrocarbyl or hydrogen, X is halogen and x is above 0 and up to 3 in a reaction medium, the majority of which comprises liquid ethylene, at a temperature from - 50 C. to the initial temperature of ethylene, and with a concentration of transition metal compound not exceeding 0À01 m. moles per litre of liquid ethylene. The product may be obtained in the form of fibrids, powders or flocks. Examples refer to the production of polyethylene in liquid ethylene at temperatures of -10 to - 45 C., using a VOCl 3  and Al 2 Et 3 Cl 3  catalyst.
Patent GB-301569-A (GB)
Title: Improvements relating to 12-phase transformer connection, particularly for rectifierservice
IPC: H02M7/06
Filed: 1927-09-07
Abstract: 301,569. British Thomson-Houston Co., Ltd., and Read, J. C. Sept. 7, 1927. Vapour apparatus, arrangements of.-In a transformer-fed rectifier system of twelve or more phases in which star-connected secondary windings are divided into m symmetrical n-phase groups A - - D, harmonics due to the voltage difference between the rectified voltage of one group and that of the m groups are absorbed by connecting the star points of the groups to windings E - - H on a common interphase transformer J, these windings being connected in pairs to separate interphase transformers K, L whose neutral points are interconnected to form the main star point of the system.
Patent GB-337422-A (GB)
Title: Improved method and means for storing and transporting fruit
IPC: A23B7/148
Filed: 1929-07-31
Abstract: 337,422. Kidd, F., and West, C. July 31, 1929. Materials, special, for bags.-In the storage or transport or ripening or other treatment of fruit, vegetables, &c. in conditions in which the atmosphere surrounding the fruit is controlled in respect to its composition, the fruit, &c. is enclosed in. bags a desired proportion of the material of which is selectively permeable to the gases present in said atmosphere for controlling their concentration therein. The permeable material may be a rubber or rubberized fabric membrane, the use of rubber membrane 1/5 and 1/50 inch thick being mentioned. The mouth or walls of the bag may have pressure controlling means. Reference is made to the ripening of fruit by reducing the oxygen concentration and by limited increase of the carbon dioxide concentration and to increase in the rate of ripening by use of ethylene.
Patent GB-1254012-A (GB)
Title: Improvements in or relating to cleaning oil burners
Inventor: COOPER REGINALD BRUCE
IPC: F23K5/18
Filed: 1968-05-17
Abstract: 1,254,012. Cleaning spray burners. ASSOCIATED BRITISH COMBUSTION Ltd. 16 May, 1969 [17 May, 1968], No. 23642/68. Heading F4T. A method of cleaning a spray burner (not shown) comprises passing a purging medium through the burner in a first period, adding an oil solvent to the purging medium and passing the mixture in a second period, and completing the cleaning by passing purging medium only in a third period. The purging medium, e.g. steam, air, or carbon dioxide, passes through a chamber 9 where it is mixed with the solvent, e.g. naphtha, sprayed from a nozzle 10. When the burner is still in use compressed air is passed via a control valve 1, a first spool valve 2, and flow restrictors 4a, 4b, to the left hand side of a drive cylinder 5, the right hand side of which is connected to atmosphere via a second spool valve 3. A pumping cylinder 6 ganged to the cylinder 5 thus draws solvent from a header tank (not shown). When the burner is shut down the first purge period begins and the first spool valve 2 is switched to connect the compressed air source to the second spool valve 3 and to connect the left hand side of the drive cylinder 5 to atmosphere. The cylinder 5 thus bleeds to atmosphere to enable the second spool valve to switch and interconnect the right hand side of the drive cylinder 5 to the first spool valve 2. Thus the second purge period begins and the pumping cylinder 6 pumps solvent through the nozzle 10. The third purge period begins when all the solvent in the pumping cylinder 6 has been expelled, and is terminated by closing a purge valve (not shown) in the actuation line of the first spool valve 2.
Patent GB-219530-A (GB)
Title: Improvements in and relating to percussive rock drills and like fluid pressure operated tools
IPC: B25D9/18
Filed: 1923-09-21
Abstract: 219,530. Rayner, G. H. T., and Rayner, P. Sept. 21, 1923. Slide valves, cylindrical and piston; fluid-actuated gears. -In percussive tools of the kind described in Specification 161,761, wherein the admission and main exhaust to and from both ends of the cylinder are controlled by ports and passages n, d in the piston which alternately communicate with a supply port b and a common rear exhaust port o, and wherein an auxiliary exhaust is provided for the rear end of the cylinder, a bleed to atmosphere and an auxiliary exhaust controlled by the auxiliary exhaust valve j is also provided for the front end of the cylinder. Compressed fluid, or fluid initially supplied or leaking to the front cylinder end, passes through a passage p, and ports q, s in the auxiliary exhaust-valve chest controlled by the valve to atmosphere in until the rear end of the cylinder is exhausted, when the forward pressure reverses the valve j.
Patent GB-319238-A (GB)
Title: A process for fastening together two or more layers of leather, more particularly for the manufacture of boots and shoes
IPC: A43B23/20
Filed: 1929-08-01
Abstract: 319,238. Schon et Cie Akt.-Ges. Sept. 18, 1928, [Convention date]. Nails, spikes, and tacks.- Two or more pieces of leather are secured together by fastenings such as tacks, staples, or the like of celluloid or other material easily soluble in a solvent other than water. The solvent is applied, either to the surface or to the hole, where such is formed, into which the fastening is to be, or has been driven, so that its outer surface is dissolved and adheres to the leather. The fastenings may be of star or similar shape in cross-section as shown in Figs. 5, 6 to give a large surface, and may have a core of metal or fibrous or other material.