baber/WOPTO huggingface dataset:
Patent GB-535949-A (GB)
Title: An improved process for the manufacture of acetic esters of starch
IPC: C08B31/04
Filed: 1939-11-11
Abstract: 535,949. Starch acetates. CALICO PRINTERS' ASSOCIATION, Ltd., WHINFIELD, J. R., and RITCHIE, G. G. Nov. 11, 1939, No. 29896. [Class 2 (iii)] Starch to be acetylated is pretreated with formic acid or a mixture of formic and acetic acids containing not more than 2 per cent. of water, and the product is then acetylated with acetic anhydride and a very small proportion of inorganic acid catalyst such as 0.1 per cent. of sulphuric acid, the acetylation being effected preferably below 50‹C. to avoid degradation of the starch. Examples are given.
Patent GB-721953-A (GB)
Title: Improvements relating to the manufacture of cyclopentanopolyhydrophenanthrene compounds
IPC: C07J75/00
Filed: 1951-12-20
Abstract: The invention comprises 11-keto-12-hydroxy-22-isoallospirostanes, esters thereof, 11 : 23-dibromo - 12 - keto - 22 - isoallospirostanes, esters thereof, and a multistage process for the preparation of an esterified pregnan-3b ,12b -diol-11 : 20-dione compound, which comprises polybrominating a 12-keto-22-spirostane to produce an 11 : 23 - polybromospirostan - 12 - one, heating said polybromo compound with a strong alkali to produce the corresponding 11-keto-12b -hydroxy-23-bromo compound, debrominating said 23-bromo compound, degrading the resulting debrominated spirostane by heating it in acetic anhydride at a temperature of the order of 200 DEG  C., esterifying the hydroxy groups of the resulting D 20(22)-furostene compound at the 3b , 12b  and 26 positions, effecting oxidative degradation with an oxidizing agent in the presence of a water-immiscible organic solvent and hydrogenating the resulting esterified D 16 - pregnen - 3b ,12b  - diol - 11 : 20 - dione to give the corresponding saturated compound.  The bromination of 12-keto-22-n-spirostanes produces an 11 : 23 : 23-tribromo derivative, whilst the 22-iso-analogues yield an 11 : 23-dibromo derivative.  Specified starting materials include hecogenin (22-iso-allospirostan-3b -ol-12-one) and its esters, also mexogenin, manogenin, cacogenin, botogenin, and kamogenin (all of the 22-isospirostan series, although the corresponding 22-normal compounds, obtainable by ring-opening and subsequent recyclization of the iso-compounds can be employed).  In examples: (1) hecogenin acetate in acetic acid containing hydrogen bromide is brominated to yield 11 : 23-dibromo-22-isoallospirostan-3b -ol-12-one 3-acetate, which is then hydrolysed with methanolic potassium hydroxide and debrominated with zinc dust in acetic acid to yield 22-isoallospirostane-3b ,12b -diol-11-one.  (2) The diacetate, the methyl ester of the 3-hemi-succinate, and the 3-hemiphthalate of the foregoing 11-one are described.  (3) Treatment of this ketone with acetic anhydride in a sealed tube produces D 20(22)-allofurostene - 3b ,12b ,26 - triol - 11 - one upon saponification, which is then reacetylated and oxidized with chromic acid in acetic acid, isolating D 16-allopregnane-3b  : 12b -diol-11 : 20 dione diacetate by chromatographic methods. (4) Hydrogenation of the D 16 : 17 double bond using a palladium-charcoal catalyst yields allopregnane-3b  : 12b -diol-11 : 20-dione diacetate.
Patent GB-191002-A (GB)
Title: Improved manufacture of butyl chlorides
IPC: C07C17/16
Filed: 1922-11-02
Abstract: Butyl or isobutyl chloride is produced from butyl or isobutyl alcohol in a continuous manner by passing hydrochloric acid into the alcohol heated to a suitable temperature and containing a catalytic material, fresh alcohol being added to replace the butyl or isobutyl chlorides as it distils away.  As catalysts, substances are employed which have a dehydrating action, for example, sodium sulphate, copper sulphate, magnesium chloride, magnesium sulphate, sulphuric acid, phosphoric acid and sodium bisulphate, or which form a temporary addition product with hydrochloric acid, such as cuprous chloride, cupric chloride, mercuric chloride, ferrous chloride or bismuth chloride, or which combine both functions, for example zinc chloride or cadmium chloride.  The reaction conveniently takes place in a boiler surmounted by a condenser; the distillate separates into two layers, the upper consisting mainly of butyl or isobutyl chloride, and the lower of water.
Patent GB-840218-A (GB)
Title: Temperature control apparatus
IPC: G05D23/13
Filed: 1958-09-22
Abstract: 840,218. Automatic temperature-control systems. GARRETT CORPORATION. Sept. 22, 1958 [Sept. 30, 1957], No. 30238/58. Class 38 (4). A device responsive to the temperature of fluid flowing in a duct controls the energization of an electric heater controlling the mass flow of gas from a chamber the pressure in which controls the temperature in the duct. In an airconditioning system, Fig. 1, air passes through a refrigeration unit 16 and a by-pass conduit 14 arranged in parallel and deviations in the temperature of the mixture from a desired value are detected by a thermostat 20 which produces corresponding variations of electric current in a regulator unit 10. Within regulator 10 the pressure in a chamber 32 supplied with air from conduit 14 through a restricted orifice 28 is controlled so that a diaphragm 26 is moved to adjust a valve 12 to correct the temperature of the mixture by controlling the flow through the by-pass conduit. The electric current controlled by the thermostat passes through an insulated conductive tube heater 42, Fig. 2, forming the outlet of chamber 32 so that the temperature of the air bled from the chamber, and hence chamber pressure, is controlled. In modifications, the electric heater is arranged within the chamber or near, inside, or round the outside of a separate outlet tube for the chamber.
Patent GB-1212160-A (GB)
Title: Control devices for bobbin thread replenishments in lockstitch sewing machine
IPC: D05B59/00
Filed: 1969-06-16
Abstract: 1,212,160. Sewing-machines. SINGER CO. 16 June, 1969 [20 June, 1968], No. 30367/69. Heading D1G. In a lockstitch sewing machine a bobbin 35 is rewound by a bobbin winding element 45 carried with the looptaker and rotatable therewith and has a lug 54 which engages with a tapered lug 42 on the lower flange of the bobbin to turn the bobbin the engagement being effected by a manually operated cam arrangement. When a shaft 62 is rotated by movement of an inclined face 90 by the machine operator, a cam 66 is rotated to lift a follower 70 and a bracket 74 fixed thereto. This movement causes a shaft 46, which is movable relative to the looper shaft and mounted therein, to rise so that since pin 50 engages a recess in the looper drive gear (not shown) is rotated and also causes the bobbin winding element to engage the bobbin and thereby cause it to rotate also. When the cover plate (not shown) over the loop taker recess is replaced a cam thereon always ensures that rock arm 63 is returned to the normal operating position.
Patent GB-197970-A (GB)
Title: Improvements in and relating to mining machines
IPC: E21C29/10
Filed: 1921-11-15
Abstract: 197,970. White, A. E., (Sullivan Machinery Co.). Nov. 15, 1921. Coal-cutting machines. -A mining machine has cutting means at one end of the frame adapted to operate substantially at right - angles thereto, while at the other end of the frame is arranged a driving member on a horizontal axis longitudinal of the frame and co-operating with a. flexible feeding means to move the machine laterally relative to the cutting means. In the form shown, the shaft 9 of a reversible motor 3 driving the cutting chain 4 also drives a shaft 12 from Which a shaft 20 is driven either through slow-speed gearing 14 - - 19 and a clutch 21 or through high-speed gearing 29, 30 and a clutch 31; the clutches 21, 31 are preferably of the disc type and are controlled by a common link 24 and a handle on the top of the machine. The shaft 20 drives the haulage sprocket 7 through reversing bevel gearir.g 27. Guide pulleys 40, 41, 43, 44, 45 are provided
Patent GB-1186837-A (GB)
Title: Jet Pump and Filter for cleaning Fluids using said pump
Inventor: KARPACHEVA SUSANNA MIKHAILOVNA
IPC: B01D35/20
Filed: 1968-06-26
Abstract: 1,186,837. Filter with pump. S. M. KARPACHEVA, L. S. RAGINSKY, V. M. MURATOV, V. D. IVANOV and J. N. BAULIN. 26 June, 1968, No. 30385/68. Heading BID. [Also in Division F1] Liquid is pumped through a filter 15 by a jet pump comprising a pulsation chamber 1 which is alternately connected by part 12 to a source of compressed air and to atmosphere, chamber 1 communicating with a discharge chamber 4 through nozzles 8 in a ring 7. The ring 7 is closed at its upper end 9 and open at its bottom end to a disc-shaped passage 3 communicating with chamber 4. Nozzles 8 are tangentially disposed to a common circle to impart rotary motion to liquid passing through them when chamber 1 is pressurised, Fig. 2 (not shown). The rotating liquid moves outwardly in passage 3 due to centrifugal force, and induces liquid to be filtered through a suction pipe 6. When chamber 1 is connected to atmosphere, it refills with liquid from suction pipe 6. The liquid discharged into chamber 4 rises through filter 15 and discharges through pipe 18. The filter is cleared of sediment by the rising liquid, and by air drawn through the filter when the liquid level falls in chamber 4 during the period when chamber 1 is connected to atmosphere.
Patent GB-1272581-A (GB)
Title: Disc brake pad assemblies
Inventor: HESS WOLFGANG
IPC: F16D65/095
Filed: 1968-06-26
Abstract: 1,272,581. Disc brakes; brake pads. GIRLING Ltd. 23 June, 1969 [26 June, 1968], No. 30555/68. Heading F2E. A brake pad assembly 32 for a vehicle disc brake as described in Specification 1,262,263, comprises a block of friction material secured to a backing plate, the backing plate having in the region of each of its opposite ends a pair of abutment faces formed on projecting portions 36, 36A which faces co-operate with guiding surfaces 34 of a caliper: the backing plate and the block extend beyond and between each pair of projecting portions 36, 36A. The disc brake comprises a caliper structure formed by two opposed halves each having a mutually abutting joint surface parallel to the plane of the disc, the caliper halves being disposed respectively on opposite sides of the disc and the structure including a bridge portion straddling the disc, and wherein each caliper half is formed with guide surfaces 34 perpendicular to the plane of the disc for guiding a respective one of the pad assemblies 32.
Patent GB-355094-A (GB)
Title: Process for the manufacture of camphene
IPC: C07C1/30
Filed: 1930-10-13
Abstract: Camphene is manufactured by passing pinene hydrochloride vapour, advantageously mixed with other vapours such as water or xylene vapour, over a catalyst comprising a surface catalyst, a metal salt or a mixed catalyst from several of these substances, for example one in which a surface catalyst acts as a carrier for a salt.  As catalysts are specified: silica gel, pumice, zeolites, such as the substance known under the registered Trade Mark "Frankonit," or "Tonsil," nickel, copper, copper phosphate or borate in finely divided form.  In an example pinene hydrochloride vapour is passed with steam over copper borate on pumice in a copper tube at 400-500 DEG  C.
Patent GB-533795-A (GB)
Title: Improvements in or relating to means for screening roof lights and other windows
IPC: E04D13/03
Filed: 1939-11-25
Abstract: 533,795. Window shutters. LOCHHEAD, T. C. Nov. 25, 1939, No. 30787. [Class 20 (iii)] Roof lights 1 and other windows are screened by panels 14 which-slide on each other and on guides 5, 10 and are joined by pliable wire or textile connections 16 secured at one end to a stationary frame 6 and to the rear edge only of each panel so that the rear edge overlaps the front edge of the preceding panel; and one edge of each panel has on the upper or lower side a rib 15 acting on the preceding panel when moved out of screening position so that the panels rest when in non-screening position in staggered juxtaposition in a pack and when in screening position in a line with the front and rear edges overlapping. The panels lie beneath the window 1 and a cord 25 attached to the first panel and passing over a pulley 26 moves each in turn by the pliable connections 16 into the screening position. A cord 19 passing over pulleys 22, 24 and attached to the first panel retracts the panels, which inter-engage in turn by the ribs 15. The panels are of waterproof material, e.g. roofing felt on wood or metal frames stiffened by a diagonal strut 12, or may be translucent, or of wood, metal, or asbestos cement. A projection 9 on the frame 7 covers the edge of the first panel. Guide rails 5, 10 are formed integral with the window frame or are secured thereto. The last panel is fixed in the frame 6 level with the guides 10.
Patent GB-972920-A (GB)
Title: Improvements relating to wheeled vehicles carrying tool bars for cultivation
Inventor: HOWSON DAVID FRANK
IPC: A01B59/048
Filed: 1962-08-10
Abstract: 972,920. Agricultural implements. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Aug. 9, 1963 [Aug. 10, 1962; Sept. 24, 1962; April 5, 1963], Nos. 30809/62, 36267/62 and 13734/63. Heading A1B. A tool bar 30 is supported in fornt of the front wheel axis of a tractor by a pair of interconnected side arms 31 pivoted at 34 to the side members 2 of a tractor, upward rotational movement of the tool bar about the pivotal axis being substantially unrestricted and downward movement being limited by a stop in the form of the front cross member 4 of the tractor. The tool bar is raised manually by means of lever 35 connected to a cross-member interconnecting arms 31 by a chain 37 passing over a pivotally mounted lever 38. An arm 42 rigidly secured to the tool bar carries a depth control wheel 46. In a modification the depth control wheel is omitted and a further tool bar provided behind the rear wheel axis of the tractor, both tool bars being lifted by the same lifting mechanism. In a further modification, the lifting mechanism is arranged to be actuated by the forward movement of the tractor.
Patent GB-476928-A (GB)
Title: Improvements in and relating to kilns and plants for burning bricks and the like
IPC: F27D3/12
Filed: 1936-03-13
Abstract: 476,928. Brick &c. kilns. GEYER, A. March 13, 1936, No. 30822/37. Divided out of 475,409. [Class 51 (ii)] In a multi-chamber continuous kiln for burning bricks &c., of the kind in which each chamber is fitted with a rail track 3 permitting the introduction and withdrawal of trucks 5 on which the goods 6 are loaded, abutments 15 are provided on the walls of the chambers on which, during the drying operation, pallets or bearers 16 carrying the goods are supported. The apparatus is identical with that described in Specification 475,409 with reference to Figs. 1, 6, 7, 8, 9, 10, 11, and 12.
Patent GB-816196-A (GB)
Title: Alarm device for indicating losses of liquid from closed containers
IPC: B67D7/32
Filed: 1957-10-02
Abstract: 816,196. Indicating liquid levels. SPETZMANN A..G. Oct. 2, 1957 [Oct. 4, 1956; Aug. 5,1957], No. 30833/57. Class 123(1) A device for giving warning of a fall of liquid level in a closed container 1, for example, due to leakage or theft from a tank such as a petrol storage tank, comprises a dip tube 4 extending to near the bottom of the container and made of pipe lengths of increasing diameter with the largest adjacent the bottor, the dip pipe being connected by a pipe 5 to a diaphragm chamber 7. Within the chamber a member 10 carrying a contact 9 is suspended by an adjustable spring 11 and secured to the diaphragm 13. The depression in the pipe 4 caused by a fall in level in the container causes the diaphragm to pull the member 10 downwardly, the contact 9 engaging a fixed contact 8 to complete ah alarm circuit containing a bell 14. To release or admit air from or to the container during filling or discharging, a vent pipe 16 surmounted by a housing 17 within which are one-way valves 19, 18 is provided. Moreover, to secure stable pressure .conditions in the dip pipe a solenoid vent valve 6 is opened periodically by a, time switch. The valve 6 is also opened automatically during filling or discharging to render the alarm apparatus inoperative. In a modification, the space above the diaphragm 13 is also vented simultaneously with the dip pipe.
Patent GB-231918-A (GB)
Title: Improvements in distributing valves for swash plate motors or pumps
IPC: F01B3/00
Filed: 1923-12-07
Abstract: 231,918. Armstrong, Whitworth, & Co., Ltd., Sir W. G., Lee, H. W , and Fee, F. Dec. 7, 1923. Multiple-delivery piston pumps; valves and valve seats, arrangement of.-In a swash-plate motor or pump having a rotary distributing-valve with longitudinal passages connecting the inlet and outlet with transverse passages leading to and from the cylinders, leakage between the various parts is prevented by circumferential ribs or grooves d on the valve engaging circumferential grooves or ribs e on the valve liner. Specification 231,917 is referred to.
Patent GB-465604-A (GB)
Title: Telephone system with means for diverting a call from one receiving station to another
IPC: H04Q3/00
Filed: 1935-11-08
Abstract: 465,604. Automatic exchange systems. HASLER AKT.-GES. VORM. TELEGRAPHEN - WERKSTATTE VON G. HASLER. Nov. 8, 1935, Nos. 30960, 30961, and 30962. Convention dates, Nov. 17, 1934, Oct. 29,1935, and Oct. 29,1935. [Class 40 (iv)] A substation is provided with apparatus which, in the absence of the subscriber, responds to ringing current and causes an incoming call to be extended over a further connection at the exchange to a predetermined line in accordance with the setting of an impulse-sender by the subscriber. The arrangement of Fig. 1 employs motor M with a rotating wiper AT co-operating with selectively positioned earthed plugs St 1-4. Ringing current operates relay RR to start the motor. The momentary closure of cam contacts A, B trips the ringing and operates relay BR which locks and transfers the connections of the line to initiate a fresh call. Trains of impulses are sent from contact J until the wiper AT reaches an earthed plug when relay UR energizes and bridges the contact J. Relay UR falls back when contact K opens and starts the sending of the next impulse train. At the end of the revolution of the motor M, contact B recloses and operates differential relay DR to complete the connection of the calling line to the fresh number. In a modification, rotatable setting arms bridge the impulse contact directly to terminate each train of impulses. The arrangement of Fig. 2 employs a bank of setting keys and a relay counting chain RT 1-0. Relay R responds to ringing current, trips the ringing and connects up relay C, which operates differential relay CR to transfer the line connections and starts the interacting impulse relays I, K. Impulses are sent over the line at contact i2 and at contact i3 through differential relay D1 to the counting relays which pull up in succession. When the number of impulses corresponds to the depressed ten thousands key ZT, relay U pulls up and disconnects I and the operated counting relays. Relay U falls back after a delay introduced by relays V1, V2 and the next, impulse train is sent under control of the depressed thousands key T, and so on. Each operation of U connects up a fresh relay of the chain M-P, and these relays in turn control sequence relays ZT-E. The final operation of U connects up P which disconnects C and applies earth to one wire of the line to energize differential relay DR to complete the connection.
Patent GB-986429-A (GB)
Title: A system of exciting an electromagnetic clutch operating with a direct current generator on motor bicycles and the like
IPC: H02P29/00
Filed: 1961-08-29
Abstract: 986,429. Clutch control. SUZUKI JIDOSHA KOGYO KABUSHIKI KAISHA. Aug. 29, 1961 [Sept. 17, 1960; Jan. 25, 1961; May 6, 1961], No. 31090/61. Heading F2L. The exciting coil 3 of an electromagnetic clutch for vehicles such as motor bicycles, is supplied by a direct current generator 4 driven by the vehicle engine, the coil 3 replacing, or forming part of, the resistance of the usual regulator 6 for the generator. The generator has a field coil 5 connected to a contact arm C of the regulator 6, the arm C being spring biased to engage a contact A, and being actuated to engage a contact B by a solenoid 7 supplied bythe generator. At low engine speeds the contact A is engaged, shunting out the clutch coil 3 and connecting the field coil 5 directly across the generator terminals. With increasing engine speeds the contact A is broken, thus connecting coil 3 in series with the field coil 5. Coil 3 is thus energized, but the current in coil 5 is reduced, reducing the generator output and causing contact A to be re-engaged. The cycle then repeats, the time during which contact A is broken increasing as the engine speed increases, and the amplitude of movement of the arm C increasing, until the contact B is engaged, whereupon the clutch coil 3 is connected directly across the generator terminals. The field coil 5 is, however, shunted out so that the generator output falls and contact B is broken. Arm C may for a time vibrate between the contacts A and B, but with increasing engine speed the arm vibrates between an open position and contact B, the period during which contact B is engaged continually increasing. The exciting current in the clutch coil 3 is thus gradually increased. A resistance 11 may be connectable into the circuit of the field coil 5 to delay the point at which the clutch begins to engage. Alternatively, a variable resistance, adjusted in accordance with an engine throttle control, may be inserted in the field coil circuit. In another modification the clutch coil 3 is connectable to a battery 8 by a governor closed switch. The clutch may be of the magnetic fluid type.
Patent GB-882900-A (GB)
Title: Material spreader
IPC: A01C3/06
Filed: 1960-09-09
Abstract: 882,900. Manure distributers. KUCERA, J. B. Sept. 9, 1960 [April 11, 1960], No. 31096/60. Class 6(1). A manure spreader comprising a body 10 and a conveyer 13 for moving material rearwardly is provided with material engaging and spreading blades 42 pivotally mounted between discs 33 fixed to a shaft 28 driven by gearing from a tractor power shaft. As shown in Fig. 5, the blades are mounted at an angle to the shaft 28 and are formed with teeth 45. Manure is uniformly disintegrated by the impact and shear action of the blades 42 and is moved on to an apron 46 comprising upright horizontally diverging plates.
Patent GB-310986-A (GB)
Abstract: 310,986. Neale, J. Jan. 4, 1928 Printing meters.- A lamp D, Figs. 1, 2, is surrounded by a cylindrical screen J a portion L, Fig. 3, of which is of graded opacity or obliquely cut away. The screen is rotated under the control of the current from a selenium or like cell G which is connected in series with a galvanometer coil H attached to the screen. The device may be used, as shown in Fig. 1, for controlling the intensity of the light which passes from the lamp D through a photographic negative B, to a sensitized film A, the films A, B, being in the form of continuously travelling strips. The con. trolling light-sensitive cell G is illuminated by light from a source F which passes through the negative B at such a distance from the point of incidence C of the photographic beam E as to allow for inertia effects. The arrangement is such that the beam E is most intense for the densest parts of the negative. In a further application, Fig. 2, the device is used to maintain uniform illumination of a surface M by a source D of light which is subject to fluctuation. The screen J is moved, so as to produce this effect, under the control of a light-sensitive cell G which is exposed to full illumination through a cut-away portion J1 of the screen. The graded opacity of the screen J may be obtained by tinting a sheet of transparent material or by varying progressively the number of layers through which the light passes. The screen may comprise a glass drum covered with a layer of film of graded opacity. The light-sensitive cell G is preferably of the kind described in Specification 284,942, [Class 40 (iii), Telegraphs, Electric].