baber/WOPTO huggingface dataset:
Patent GB-722000-A (GB)
Title: Improvements relating to rotary hoes
IPC: A01B23/02
Filed: 1951-02-26
Abstract: 722,000. Rotary hoes. FERGUSON, H., Inc. Feb. 26, 1951 [March 11, 1950], No. 4575/51. Class 6 (1). [Also in Group XXII] A rotor for a rotary hoe comprises a hubmember 15 having a series of radially-spaced pairs of holes 18 and a plurality of teeth 10, each tooth comprising a fastening portion provided with studs 12 which pass through the holes and a longitudinally-curved working portion, there being a stiffening rib 13 extending along the tooth to its outer end but curving at a different rate from the tooth, the rib being formed on the opposite side of the tooth from the studs. The studs are frusto-conical in shape and are hammered over to form rivets 19 retaining the studs in the holes 18. The teeth are forged and have the studs upset integrally during forging, the ribs acting as backing elements during upsetting.
Patent GB-1411717-A (GB)
Title: Process for and preparation of catalyst for the copolymerisation  of alpha-olefins
IPC: C08F10/00
Filed: 1973-01-30
Abstract: 1411717 Olefin polymerization catalysts SOLVAY & CIE 30 Jan 1973 [31 Jan 1972] 4592/73 Heading C3P A catalyst component for the polymerization of olefins is prepared by treating with a vanadium compound, a complexed solid reduced titanium chloride of the formula where M is a metal of Group I A , II A , II B  or III B  of the Mendeleef Periodic Table, R is a hydrocarbon radical containing 1-18 carbon atoms, X is halogen, p is the valency of M, n is 0 or between 0 and p, X is 0 or between 0 and 0-5 or 0.5, y is greater than zero and C is a complexant which is an organic compound containing one or more pairs of electrons capable of complexing with Ti and A1. The component is used together with an organometallic compound of a metal M in the polymerization of olefins. The component may be prepared by reducing TiCl 4  with an organometallic compound, a metal M, or with hydrogen then reacting the reduced solid with the complexant which may be an ether, thioether, thiol or amine and reacting the complexed solid with a vanadium compound which contains halogen or alkoxy radicals or which is a chelate compound. In the examples AlEt 3  reacted with alumina is used to reduce TiCl 4  to a reduced solid which is reacted with diisoamylether then with VOCl 3  or VCl 4  or with TiCl 4  and subsequently with VOCl 3  to form the catalyst component which is used with AlEt 2 Cl, Al(nC 6 H 13 ) 3  or AlMe 3  to copolymerize ethylene and propylene in bulk or to form terpolymers of these with hexadiene-1,4 or ethylidene norbornene. The product polymers are vulcanized.
Patent GB-642194-A (GB)
Title: Improvements in sheet feeding mechanism
Inventor: ROSE ALFRED GERMAN
IPC: B65G59/06
Filed: 1948-02-18
Abstract: 642,194. Feeding sheets. ROSE BROS. (GAINSBOROUGH), Ltd. Feb. 18, 1948, No. 4757. [Class 100 (i)] Sheets of fabric are fed to machines from the bottom of a pile 11 by means of a spiked member 13 fitted with tines 38 which are moved into engagement with the bottom sheet of the pile so as partially to penetrate the bottom sheet by the combined action of an arm 18 oscillated about a bearing 16 by means of a cam 21, and of a slide member 27 which is reciprocated by a lever 31, 32 oscillated by a cam 36. The slide 27 moves in a guide carried by the arm 18, so that it is first raised to cause the tines to penetrate the sheet, and then lowered to carry the sheet to a position in which the separated sheet is seized by oscillating grippers 39. As the separated sheet is withdrawn by the grippers 36 the tines 38 are simultaneously withdrawn from the sheet. The invention is applicable for feeding fabric pads to machines as described in Specification 398,874, [Group XVII], for making hair-waving sachets.
Patent GB-445806-A (GB)
Title: An improved method of producing coloured photographic materials
IPC: G03C7/28
Filed: 1935-02-14
Abstract: 445,806. Colour photography. GASPAR, B., 59, Rue de Tenbosch, Brussels. Feb. 14, 1935, No. 4774. [Class 98 (ii)] The gelatine of the photographic layer is coloured with the water-soluble copper or chromium complex salts of dyestuffs which are known as Neolan dyestuffs. The process may be applied to the production of multicolour screen material obtained by emulsifying a plurality of coloured emulsions or to the production of multi-layer colour photographic materials. On a silver halide gelatine emulsion coloured with Neolan Yellow R and sensitized for green with Pinaflavol may be poured an emulsion coloured with Neolan Pink G and sensitized for red with Ethyl Violet. A silver bromide emulsion containing the quinoline salt of Diamine Pure Blue FF may constitute a third layer. In another example, one side of a support is coated with a silver halide emulsion sensitized for red and coloured orange with Neolan Pink B and Neolan Yellow R, and on the other side is coated an emulsion sensitized for blue and coloured blue with Diamine Pure Blue FF. A two-colour image is printed on to this material through red and blue filters. The dyestuff may be destroyed at the points of the silver deposit by acid thiocarbamide solution. Specifications 395,718, 397,159, 397,188, 397,192, and 408,991, are referred to.
Patent GB-453745-A (GB)
Title: Improvements in pillows
IPC: A47G9/10
Filed: 1936-02-17
Abstract: 453,745. Pillows. BUCKLEY, L. M., 156, Haverstock Hill, Hampstead, London. Feb. 17, 1936, No. 4774. [Class 52 (iv)] The filling for a pillow consists of an elongated bag of fabric stuffed and quilted on lines parallel to its ends of a width approximating to the length of the pillow and of such a length that it can be folded on itself several times to form a pad for insertion into the pillow case.
Patent GB-727765-A (GB)
Title: Improvements in or relating to negative impedance devices
IPC: H04B3/18
Filed: 1953-02-20
Abstract: 727,765. Negative impedance loading. MOULON, J. M. Feb. 20, 1953 [Sept. 19, 1952], No. 4845/53. Class 40 (4). [Also in Group XL (c)] A negative impedance device (i.e. a device which presents an impedance having a negative resistance component) comprises an amplifier having two feedback paths between its output and input, one providing positive feedback and the other negative feedback, and one of said feedbacks being of series type and the other of shunt type, an impedance of predetermined value being inserted into one feedback path, whereupon the negative impedance is presented across a pair of terminals in the other path. The gain of the amplifier is made large, i.e. in excess of 20 db., whereby it may be shown that the negative impedance appearing across the pair of terminals is related in a directly proportional manner to the impedance inserted into the other feedback path and is substantially independent of the input and output impedances of the amplifier. In one embodiment employing transistor amplifying stages coupled by a phase-reversing transformer 21, the inserted impedance Zp is connected between a pair of terminals 7, 8 in the negative feedback path, the feedback being of shunt or voltage type. Positive series or current feedback is provided via a phase-reversing output transformer 6 and terminal 9, the negative impedance being presented between terminals 9 and 10. This is arranged in series with a further impedance Zq the resultant impedance being coupled in series with a two-wire telephone transmission line 30 by means of transformer 31 to reduce transmission loss in the line. The transistors 51, 52 are fed in series from battery 22, and the condensers 22<1> and 23 are blocking condensers. The impedances Zp and Zq are chosen so that the negative impedance is effective between 300 c/s. and 3000 c/s. In an alternative arrangement using a similar amplifier, wherein however the interstage coupling transformer effects no phase reversal, Fig. 8 (not shown), the impedance Zp is inserted into a negative-currentfeedback path, the negative impedance being presented across the terminals of a transformer coupled into a positive voltage feedback path.
Patent GB-1038492-A (GB)
Title: Dispensing containers for detergents
Inventor: STALLARD JOHN ARTHUR
IPC: C11D17/04
Filed: 1963-02-06
Abstract: Detergent compositions comprise ionic or non-ionic wetting agents which may be sulphonated alkylated benzenes and sulphated fatty alcohols; softening agents which may be lanoline or amphoteric surface-active agents, e.g. N-cetyl betaine, N-substituted b -amino propionic acid, and N-coco-b -amino butyric acid; corrosion inhibitors, e.g. sodium silicate; bleaching agents, e.g. hydrogen peroxide and sodium hypochlorite; germicides, e.g. trichlorocarbanilide and hexachlorophene; perfumes; chelating agents, e.g. inorganic phosphates; peptizing agents, e.g. sodium pyrophosphate; foam stabilizers, e.g. fatty alcohol/ethylene oxide condensation products; optical brighteners; and solubilizers, e.g. toluene sulphonate and lithium hydroxide.  The following ingredients constitute examples of two solutions which may be filled into separate compartments of a dispensing container (see Division B8) and poured simultaneously from the container: (1) sodium dodecyl benzene sulphonate, N-substituted b -amino propionic acid, carboxymethyl cellulose, methylated spirits, water, and hydrogen peroxide; and alternatively, (2) potassium pyrophosphate, sodium tripolyphosphate, sodium silicate, carboxymethyl cellulose, and water.ALSO:A liquid bleaching agent, which may have another compatible ingredient added, is filled into one compartment of a container (see Division B8), the remaining ingredients of a detergent composition (see Division C5) being filled into a second compartment of the container.  The bleaching agent may be hydrogen peroxide or sodium hypochlorite.  The remaining ingredients of the detergent composition may be as follows: ionic or noninionic wetting agents, e.g. sulphonated lakylated benzenes and sulphated fatty alcohols; softening agents, e.g. lanoline or amphoteric surface active agents (details given); corrosion inhibitors, e.g. sodium silicate; germicides, e.g. trichlorocarbanilide and hexachlorophene; perfumes; chelating agents, e.g. inorganic phosphates; peptizing agents, e.g. sodium pyrophosphate; foam stabilizers, e.g. fatty alcohol/ethylene oxide condensation products; optical brighteners; and solubilizers, e.g. toluene sulphonate and lithium hydroxide.
Patent GB-676718-A (GB)
Title: A process for producing protective layers on metallic surfaces
IPC: B05D7/16
Filed: 1950-02-27
Abstract: Metallic surfaces are coated by forming thereon successive layers of synthetic resin materials in which the proportion of macromolecules having a linear structure is high in the layer in contact with the metal and progressively decreases in the succeeding layers whilst the proportion of macromolecules having a three dimensional structure is low in the layer in contact with the metal and progressively increases in succeeding layers, each layer being subjected to an intermediate heat treatment to effect partial polymerization and bonding thereof within adjacent layer or the metal, and the multi-layer coating thus formed being subjected to a final heat treatment to effect complete polymerization and hardening.  Specified resins are mixtures of ortho-cresylic resins (linear) and phenolic resins (three-dimensional).  It is preferred that the layer in contact with the metal contains 80-90 per cent linear structure macromolecules and 20 to 10 per cent three-dimensional structure macromolecules and the final layer 10-20 per cent linear and 90 to 80 per cent three-dimensional macromolecules.
Patent GB-751984-A (GB)
Title: A method of and apparatus for burning coal with a high percentage of volatiles
IPC: F23C1/00
Filed: 1954-02-19
Abstract: 751,984. Furnaces; coking apparatus. BABCOCK & WILCOX, Ltd. Feb. 19, 1954 [Feb. 20, 1953], No. 4988/54. Classes 51(1) and 55(1). In the combustion of fuel having a high percentage of volatiles, the fuel is first subjected to a partial carbonisation and the resulting coke and gas, mixed with the requisite combustion air, are supplied separately to a slag tap furnace. As shown in Fig. 2, dry pulverised coal is fed from a hopper 41 by a feeder 42 to a vertical retort 43, the latter being externally heated at its upper part by hot gases from a cyclone furnace 1 supplied at 54 and the coke produced being cooled in the lower part by air supplied to a jacket 46, the air thus heated being delivered through a duct 49 to a tangential inlet 50 in the furnace 1. The inlet 50 is disposed between an inlet 52, to which the gas generated in the retort passes through a valvecontrolled pipe 45, and an inlet 51 to which the coke discharged from the retort at 47 is fed by a stream of air supplied to the duct 48. In a modified arrangement shown in Fig. 1 as applied to a steam generator plant, the cyclone furnace 1 delivers into a secondary furnace chamber 3, secondary air and the air-borne coke being supplied to the former at 38, 39 respectively and the gas to the latter at 40.
Patent GB-1380721-A (GB)
Title: Production of ferrites
IPC: H01F1/36
Filed: 1971-02-19
Abstract: 1380721 Ferrites IMPERIAL CHEMICAL INDUSTRIES Ltd 7 Feb 1972 [19 Feb 1971] 4988/71 Headings C1A and C1J Ferrites are prepared by co-precipitating metal carbonates from an aq. soln. of a soluble salt of iron and at least one other metal using an aq. soln. of ammonium carbonate and/or bicarbonate, ageing the slurry with agitation at a temperature of 20-50‹ C., separating and then heating the precipitate to form the ferrite. The metal may be Mn, Zn, Cu, Ni or Ba. An oxide of Zr, Cr, Cu, Mg, Si, Ba, Co, Al, Ni, Sr, V, Ca or Ti in an amount up to 0À5% by wt. may be present in the ferrite. The separated precipitate may be dried at 100-200‹ C. and then calcined at 800-1000‹ C. The dried precipitate may be treated with an aq. soln. of Zn(NO 3 ) 2  or Ti isopropoxide in butanol to increase the metal content of the ferrite. The calcined ferrite may be treated with a solution of polyvinyl alcohol, pelleted at 400-700 kg./sq. cm., granulated to 375-425 Á, pelleted at 1490-2500 kg./sq. cm. and then sintered at 1250‹ C. in a N 2 /O 2  atmosphere. The ferrite may have an initial permeability of 1247-4452.
Patent GB-395795-A (GB)
Title: Improvements in and relating to flex drums and contacts for electrical instruments of a dental and surgical character and to trays for such instruments
IPC: A61C19/00
Filed: 1932-02-20
Abstract: 395,795. Automatically taking-up conductors. DENTAL MANUFACTURING CO., Ltd., Brock House, Great Portland Street, London, and LEE, W. G., 75, Cedar Lawn Avenue, Barnet, Hertfordshire. Feb. 20, 1932, No. 5137. [Class 36.] Flexible leads 20 from dental instruments supported on a drawer 4 are wound on spring drums 21 carried by the rear portion of the drawer. The drums are each mounted on a screwed spindle 24 and carry electrical contacts 25 adapted to engage adjustable spring mounted contacts'26 on the drum supports 27. Withdrawal of an instrument unwinds its lead from the drum, thus causing the drum to move laterally on its spindle and to close the electric circuit to the instrument. The contacts 25, 26 serve also as spring stops to prevent reverse movement of the drum under the action of its spring.
Patent GB-143171-A (GB)
Title: Improvements in or relating to packed joints for valve stems and the like
IPC: F16K41/02
Filed: 1920-02-20
Abstract: 143,171. Baines & Co., W. N., and Reid, J. G. Feb. 20, 1920. Packing, adjusting; packing, extracting; glands. -Relates to a valve &c. stuffing-box of the type having a yoke or bridge 4 with a boss 5 screwed for the reception of a nut 6 which acts on projections 7 on the gland 3, and consists in providing positive connexion between the nut 6 and the projections 7, which permits relative rotation, but enables the gland to be withdrawn with the nut during re-packing. The nut may be formed, with an inner peripheral groove 8, which is engaged by lugs 9 on the projections 7. The engaging surfaces of the nut and the projections may be bevelled, as shown, in order that the axial pressure may retain the projections in engagement with the groove. In a modification, the groove 8 is formed in the outer periphery of the nut. Alternatively, the projections may be grooved to receive a flange on the nut, engagement being secured by a ring screwing over the projections or otherwise secured.
Patent GB-609717-A (GB)
Title: Electron discharge devices using a deflected beam
IPC: H01J25/78
Filed: 1945-03-01
Abstract: 609,717. Electron discharge apparatus. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. March 1, 1945, No. 5187. Convention date, March 6, 1942. [Class 39 (i)] An electron discharge device amplifier of the beam deflection type has an output electrode system comprising a quarter-wave coaxial line section with the inner and outer conductors connected together at one end, the other end being closed for radio-frequency by an apertured part, the electrons passing through the aperture to be collected by the inner conductor. In the construction shown in Fig. 1, the beam of electrons passes through apertured electrodes 14 and 15 and is deflected by the electrodes 16 and 17 across the aperture 19<1> and across the gap 19<11> to be collected by the inner surface of the tubular inner conductor 18 of the quarterwave coaxial line constituted by the inner conductor 18 and the outer conductor 13, whereby secondary emission is suppressed. A radiator or coupling loop 20 extends through the envelope 10 and an aperture in the outer conductor 13 of the quarter-wave coaxial line and is connected to the inner conductor 18. The output and input electrodes are shielded from each other and from the output and input circuits by the construction shown. For maximum impedance the ratio of the diameters of the outer and inner tubes 13 and 18 is approximately 9 to 1 and for very high impedance the diameter of the outer tube 13 is approximately one-eighth of a wavelength. In the construction shown in Fig. 2, electrons from the indirectly heated concave cathode 31 pass through an apertured partition 34 in a cylindrical member 33 in an envelope 30 and are deflected by converging electrodes 36 and 37 across the apertured partition 35 to be collected by the electrode 32 connected by leads 38 to the inner tube 39 forming with the outer tube 40 and end walls 41 and 41<1> and resonant cavity coaxial line tank circuit of 'a quarter wavelength. Wall 41 and partition are capacitively coupled so that the end of the tank circuit is closed for radio-frequency voltages and currents except for the aperture 351. In the construction shown in Figs. 3 and 4, the beam of electrons passes from the indirectly heated cylindrical cathode 50 in the combined envelope and shielding cup 54 between converging electrodes 52 and 53 and through an elongated aperture 57<1> in the outer tube 57 to be collected by the inner tube 58 of a quarter wavelength coaxial line resonant cavity tank circuit. The envelope 54 and tube 57 are joined by an insulating collar 60. Leads and supports for the deflecting electrodes, and for the cathode and its heater, are sealed through beads in the envelope 54. The output is taken off by means of a conductor 61 passing through seal 61<1> in the outer tube 57.
Patent GB-1377368-A (GB)
Title: No-break power supplies
IPC: H02J9/06
Filed: 1972-01-14
Abstract: 1377368 Automatic phase control INDUSTRIAL INSTRUMENTS Ltd 14 Jan 1972 [23 Feb 1971] 5222/71 Heading H3A [Also in Division H2]  A circuit for synchronizing the output of a static inverter with a standby A.C. mains supply in a no break A.C. supply system comprises terminals C, D to which the inverter output is applied and terminals.-A, B to which the A.C. mains is applied. As the synchronizing circuit tries to lock the inverter output and the mains #/4 out of phase an artificial #/4 phase lag comprising resistors R 1 , R 2  and capacitors C 1 , C 2  is included. The sine wave inverter output is squared and inverted by Schmitt triggers S1a and S1b and fed to a phase comparator bridge circuit including a transformer T1 and transistors VT1 VT2. If the inverter output lags the mains, the voltage at the centre tap of the transformer secondary winding exceeds a 5V positive potential but is less than the 5V potential if the-inverter output leads the mains. This voltage causes the frequency of a multivibrator, which controls the inverter frequency, to be increased or decreased thereby bringing the inverter into synchronism with the mains.
Patent GB-177351-A (GB)
Title: Improvements in and relating to striker pen ruling machines
IPC: B41G3/00
Filed: 1921-02-16
Abstract: 177,351. Hawkes, W. Feb. 16, 1921. Ruling-machines.-A striker pen ruling- machine is constructed with a pivoted pen beam 5 which is normally kept raised from the work by an adjustable spring 21 acting on an arm 23 of the beam which is depressed to effect the ruling of the paper by means of an oscillating lever 1 acting on an arm 4 connected to the beam. The lever 1 is mounted in such a manner that it can be adjusted both vertically and horizontally. and it is operated to depress the pens to ruling position bv means of rotary cams R. The lever 1 is carried bv a slide 8 which is secured in the desired vertical position in a bracket 10 bv means of a wing nut 9, and the bracket 10 is adjustable horizontally in a base 20 carried by a side frame 36 of the machine. The lever 1 may be moved axially on its pivot 2 against the action of a spring 13, Fig. 5, and held out of operative position by a catch 14 pivoted at 15 to the slide 8. In a modified form, the bracket is pivoted to a horizontally adjustable plate arranged above the upper surface of the right side frame 36, and a catch, which normally holds the parts in operative position, may be released to permit the bracket 10 to be turned about its pivot, thereby raising the lever 1 out of operative position.
Patent GB-287304-A (GB)
Title: Improved feed mechanism for drilling and similar machines
IPC: B23Q5/52
Filed: 1927-02-25
Abstract: 287,304. Adcock, G., and Shipley, H., (trading as Adcock & Shipley). Feb. 25, 1927. Drilling.-In a drilling or like machine wherein the change from hand to power feed and vice versa is controlled by manipulating the hand lever which effects the feed, the pinion d which engages the rack on the spindle sleeve is rotated, by a shaft e through which passes the hand feed lever e<2>. A sleeve i, slidably keyed to the shaft by a transverse pin j<2>, has clutch teeth adapted to engage similar teeth on a member k rigidly secured to a worm-wheel h which is continuously rotated from a power shaft g<2>. The clutch parts are normally separated by a spring m but may be engaged by sliding the lever e<2> transversely of the shaft so as to cause a ball or roller l to ride out of an annular groove l<2> in the lever. To stop the power feed at any predetermined point a cam o fixed to a stationary disc o<2> adjustably secured to the casing f of the gearing is adapted to engage a bevelled collar n on the lever as the latter rotates and cause the ball to enter the groove l<2> and release the clutch. Should it be desired to render the power feed inoperative, a nut n<2> may be secured along a sleeve n<3> secured to the lever so as to engage the collar n with a sleeve e<4> on the shaft and maintain the lever in its central position. The drill spindle may be returned by a spring e<3> with or without weights, and the individual teeth of the clutch k, i, preferably include an angle of 90‹.