baber/WOPTO huggingface dataset:
Patent GB-1348110-A (GB)
Title: Gear shaping apparatus
IPC: B23F5/16
Filed: 1972-09-25
Abstract: 1348110 Gear-shaper MASCHINENFABRIK LORENZ AG 25 Sept 1972 [25 Sept 1971] 44146/72 Heading B3L [Also in Division F2]  A gear shaper comprises a cutter 21, on a spindle 20, the spindle being movable through an operating range between first and second positions 21b, 21c, for cutting a work gear 42, and a retracted position 21a, a stroke drive means 1-19, for moving the cutter between positions 21b and 21c, and a drive means 44-47, for retracting the spindle when the stroke drive means is disengaged. Cutter spindle 20 has annular teeth 19 which co-operate with a wormwheel 14 having face teeth 13 on each side, teeth 13 being adapted to engage face teeth on the two arms of a rocker 12. The latter is oscillated by a connecting rod 9 driven by a motor 1 through a continuous cone pulley gear 2, 3, and gears 4-7. The arms of rocker 12 are held in engagement with wheel 14 by springs 16, and are disengaged by pressure fluid supplied from line 60, through passages 18, 59, so as to urge pistons 17 outwardly. Cutter 21, and workpiece table 41, are rotated by a motor 22 through gearing 24-28 and 31-40 respectively. Compensation for the spindle weight, shock absorbing and also the retraction of spindle 20 to position 21a are provided for by two pistons 45, 44, respectively, supplied with fluid pressure through valves 55 and 54. In operation, with the work-table at loading position 41a, Fig. 1, and the cutter at retracted position 21a, fluid is supplied through passages 65-67 so as to raise piston 44. Fluid has also been supplied through valve 53 to space 59 so that pistons 17 are moved to disengage rocker 12 and wheel 14. Fluid passes from the space beneath piston 45 through valve 55, so that this piston moves downwardly. The work is moved across, the space below piston 20 is exhausted, and spindle 20 moves downwardly. Fluid is passed through valve 55 to raise piston 45 which now acts as a weight compensator. Valve 53 is operated to drain fluid from passage 59 and spring 16 engage elements 12 and 14. Motors 1 and 22are actuated and cutter 21 rotates and reciprocates past the rotating workpiece, which is therefore machined. During each upward vertical reciprocation the cutter spindle is pivoted about a point in line with worm 27 by a cam and roller device 95, 98, 99, 100, 101, so that the cutter does not engage the work. When the operation is completed a cam 51a actuates a switch 52 which provides for operation of valves 53-55, thus disconnecting elements 12, 14, and raising piston 44 so as to retract the cutter to position 21a. In a modification, the retraction of spindle 20 is provided for by a clutch drive 85-89, Fig. 3, which allows worm 14 to be rotated by a motor 77 when elements 12, 14 are disconnected, thus retracting spindle 20, pistons 44, 45, in this case being used solely for weight compensating and shock absorbing.
Patent GB-1042250-A (GB)
Title: Improvements in goods vehicles
Inventor: WATKINSON WILLIAM HIBBERT
IPC: B60P1/64
Filed: 1964-10-30
Abstract: 1,042,250. Vehicles with elevating load supports. REGISTERED PROJECTS Ltd. Oct. 30, 1964, No. 44298/64. Heading B8E. A vehicle having a load-carrying platform which is lowered to facilitate loading by rams 32, 33, 34, 35, Fig. 2, has a framework comprising side members 4, 5, 6 interconnected by crossmembers 7-22. The piston rods of rams 32, 33 and 34, 35 extend through members 13 and 14 respectively. The position to which the load platform is lowered is shown chain dotted in Fig. 3. Lowerable loading ramps 36, Fig. 2, are provided. The platform is locked in raised position.
Patent GB-895939-A (GB)
Title: Improvements in or relating to devices for laterally displacing crop lying on the ground
IPC: A01D78/00
Filed: 1958-07-22
Abstract: The subject matter of this Specification is included in Specification 895,937 but the claims differ.  Specifications 895,938 and 895,940 also are referred to.
Patent GB-969215-A (GB)
Title: Improvements in or relating to percussion devices actuated by rotating eccentric masses
IPC: B25D15/00
Filed: 1960-12-29
Abstract: 969,215. Vibratory mechanisms. SIEMENSSCHUCKERTWERKE G.m.b.H. Dec. 29, 1960 [Dec. 29, 1959], No. 44556/60. Drawings to Specification. Heading F2X. [Also in Division B4] A percussive device is actuated by the centrifugal forces developed by rotating eccentric masses, some of the masses rotating at different speeds which are in constant ratios of of integral numbers. Each mass may be replaced by a pair of masses each having equal and opposite speeds of rotation and equal moments of inertia. The ratios of the speeds may be varied by exchanging or replacing driving cog-wheels, and the drive of one or more of the masses may be disconnected. The rebound of the device may be restricted by a spring.
Patent GB-957491-A (GB)
Title: Improvements in or relating to transistor chopper circuits
IPC: H03K17/04
Filed: 1961-12-14
Abstract: 957,491. Transistor chopper amplifiers. ROCHAR ELECTRONIQUE. Dec. 14, 1961 [Dec. 28, 1960; April 15, 1961], No. 44798/61. Heading H3T. In a system for chopping a D.C. voltage into a square wave voltage, in which the emittercollector path of a transistor, rendered alternately conducting and non-conducting, is connected across a pair of input terminals which are in turn connected to output terminals, a capacitor is connected to compensate for the parasitic capacity of the transistor. As shown in Fig. 1, a D.C. voltage applied between terminal 2 and earth is chopped by means of a silicon transistor 1, biased so that its emitter acts as the collector and vice-versa and rendered alternately conducting and non-conducting by a pulse train applied to the base of the transistor through transformer 5, diode 6 and resistor 7, connected across the input terminals, a square wave output being taken from terminal 4 connected to the emitter of the transistor and the input terminal 2. The effect of the collector junction R is compensated by a balancing variable resistor 8 and the effect of the baseemitter capacity C on the output waveform of the circuit is balanced with respect to earth by means of a variable capacitor 10 connected as shown in Fig. 1, a diode 11 being connected in the circuit to correspond to the base-collector junction of the transistor. Thus the voltage at the point A<SP>1</SP> has the same amplitude as the voltage at the point A but is in phase opposition thereto, and if the capacitor 10 is suitably adjusted a voltage is passed to the point B which will cancel the signal there due to capacitor C passing the voltage change at A when the transistor is switched off and a negative voltage when it is switched on, Fig. 2(b) (not shown). In a further embodiment, Fig. 3 (not shown), two silicon transistors with associated variable resistors and capacitors as described above are connected in parallel and provide a push-pull output, each transistor having the effect of the collector junction resistance and the base-emitter capacitance balanced by a variable resistor and capacitor. If the diodes connected in the circuit are of the same material as the transistors the effect of temperature variations on the circuit may be eliminated.
Patent GB-1064879-A (GB)
Title: Improvements in or relating to analogue computing apparatus
IPC: G06G7/161
Filed: 1965-10-22
Abstract: 1,064,879. Electric analogue calculating. HONEYWELL Inc. Oct. 22, 1965 [Oct. 27  1964], No. 44802/65. Heading G4G.  Electric analogue computing apparatus for XY deriving the expression - comprises an inte- Z grator 2 comprising an amplifier with capacitance feedback shunted by a discharge switch 6 receiving an input voltage signal representing Y at terminal, the output operating relay 7 over Zener diode 8 to control switch 6 and being summed with an input voltage signal representing X at termirial 12 at input 11-of amplifier 14 with feedback over-Zener diode 15, whose output is coupled over differentiating capacitance 16 to relay 17 shunted by discharge diode 18. The amplifier output is held to zero by the Zener diode 15 when the inputs at 11 are unequal but at equality the diode ceases to conduct forwardly and the amplifier output rises to operate relay 17. A second integrator 21 comprising an amplifier with capacitance feedback shunted by a discharge switch 25 controlled by relay 7 received an input voltage signal representing Y over normally closed switch 26 controlled by relay 17, and the output is applied to junction 36 connected over normally open switch 33 to amplifier 34 with feedback storage capacitance 35; the output of which is connected to terminal 32 and over resistance 31 to junction 36 where it is added to the output of integrator 21. In operation, the output of integrator z=#<SP>T</SP> zdt=zt. and amplifier 14 produces an O  x  output when x = zt or t= -to operate relay 17. z Meanwhile, the output of integrator 21= T#  #o <SP>Ydt = Yt</SP> and switch 33 closes and switch 26 opens for a short period of time to sample signal Yt and to correspondingly charge storage capacitance 35; the sampling period being set by. the differentiation time constant to match the storage rate of amplifier 34 and capacitance 35. When the output of integrator 2 is sufficient to backtrack Zener diode 8, relay 7 operates to close switch 6, 25 and discharge capacitors 5, 24 to terminate the integration, after which the switches re-open after a time lag to permit recommencement of the cycle. Provided the output of integrator 2 exceeds any value of X so that relay 17 is operated before relay 7, the stored voltage on capacitance 35 YX appearing on terminal 32 = Yt = - since Z X  t = -; Y being of either sign to permit two Z  quadrant multiplication. In a modification (Fig. 3, not shown) the discharge switches of capacitor 5 and 24 are controlled by a relay 42 driven from a pulse amplifier 43 responsive to de-energization of relay 17, so as to operate shortly after relay 17 releases; Zener diode 8 and relay 7 being omitted.
Patent GB-1198087-A (GB)
Title: Purification of Hydroxy Aromatic Acids
IPC: C07C65/03
Filed: 1967-10-03
Abstract: 1,198,087. Hydroxy aromatic acids. TENNECO CHEMICALS Inc. 3 Oct., 1967 [5 Oct., 1966], No. 45048/67. Heading C2C. Hydroxy aromatic carboxylic acids are purified by mixing an aqueous solution of the impure acid or a metallic salt thereof with a minor amount of a chelating agent consisting of a polycarboxylic acid or an amino-polycarboxylic acid or a metallic salt thereof, the solution having a pH of 4À5-5À8; heating the resulting aqueous solution to a temperature not above 75 C.; contacting the heated solution with activated carbon; acidifying the carbontreated solution to lower its pH to a value not more than 3 thus precipitating the hydroxy aromatic carboxylic acid; and recovering the precipitated acid from the resulting aqueous slurry. The process is applicable to, for example, salicylic acid, 4-hydroxybenzoic acid, 2.3-dihydroxybenzoic acid, 2,4 - dihydroxybenzoic acid and 2-hydroxy-3-naphthoic acid and its salts. The preferred chelating agent is tetrasodium ethylenediaminetetra-acetate.
Patent GB-1165593-A (GB)
Title: Fibrous Products.
Inventor: CAMPBELL TOD WILDY
IPC: D04H1/435
Filed: 1967-10-04
Abstract: 1,165,593. Pillows. E. I. DU PONT DE NEMOURS & CO. 4 Oct., 1967, No. 45142/67. Heading A4M. [Also in Division D1] A fibre blend which may be used in making stuffings for refluffable pillows comprises at least 20% by weight of natural or regenerated cellulosic fibres and at least 5% by weight of polypivalolactone staple fibres. The blend may also contain polyamide, polyacrylonitrile, or polyurethane staple fibres.
Patent GB-1279826-A (GB)
Title: Method and apparatus for cutting chamfers on piston rings
Inventor: ADAM GERHARD
IPC: B23Q3/06
Filed: 1969-09-16
Abstract: 1279826 Chamfering piston rings KRAFTFAHRZEUGZUBEHOERWERKE DRESDEN VEB 16 Sept 1969 45505/69 Headings B3B and B3C In a method of cutting chamfers on the edges of piston-rings the rings are fed by a slide 6 one after the other from a stock along one side of a horizontal plate member 1 to a guide and clamping device 2, each ring 7 being inserted and retained in the device 2 by a pusher member 8 whereupon a rotary cutting head 9 with a chamfering tool 10 is presented to the pistonring, to simultaneously chamfer the inner and outer edges on one side of the ring. At the completion of this machining operation the ring 7 is pushed by the member 8 from the clamping device to a slide 11 on the other side of the plate member 1 and which transfers the ring 7 to a second guide and clamping device 3 located laterally of the device 2 and having an axis parallel thereto. A second pusher member 12 located the ring 7 in the device 3 and a second cutter head 13 with a chamfering tool 14 is presented to the ring 7 to effect simultaneous machining of the chamfers on the other side of the piston-ring. When completed the ring is displaced from the guide and clamping device 15 by a compressed air jet. The operation of the machine may be automatically controlled whereby a continuous succession of rings are chamfered in the two machining operations described.
Patent GB-1062477-A (GB)
Title: Improvements in or relating to thermoplastic compositions
IPC: C08L51/04
Filed: 1963-11-18
Abstract: Thermoplastic compositions are made by grafting on to 100 parts of polybutadiene or a butadiene/styrene copolymer containing 60-90% of butadiene, 80 to 120 parts of a monomer mixture containing 35-49% of methyl methacrylate, 60-36% of styrene and 0-15% of acrylonitrile, and mixing the product with a homopolymer or copolymer of vinyl chloride. The grafting reaction is preferably carried out in a latex of the butadiene polymer in the presence of a peroxy catalyst.
Patent GB-1330505-A (GB)
Title: Pulse generating apparatus
IPC: H03K3/537
Filed: 1970-09-24
Abstract: 1330505 Ignition systems BENDIX CORP 24 Sept 1970 [25 Sept 1969] 45598/70 Addition to 1330503 Heading F1B [Also in Division H3] A pulse generator comprises a supplementary condenser 31 of smaller capacity than a main condenser 20 and a first gap 36 having a breakdown potential less than that of a second gap 25 the main and supplementary condensers are charged in parallel from input terminals from a uni-directional voltage source 15, 16, 17 and 19 until the first gap 36 breaks down so as to connect the condensers 20, 31 in series across the second gap 25 which then breaks down and output terminals are thereby connected through the second one 25 only of the gaps across the main condenser 20 and the primary winding 35 of a voltage step-up transformer 28 is connected by the first gap 36 in the series circuit comprising the main and supplementary condensers 20, 31 and the secondary winding of which is connected in series the circuit comprising the main condenser, the second gap 25 and the output terminals. Source 13, such as A. C. or interrupted D.C. is supplied via RF filter 14, transformer 11 and a voltage doubling circuit 15-17, 19, 22 to charge the condensers 20, 31. When the trigger gap 36 breaks down the condensers 20, 31 are connected in series with the primary 35 of the step up transformer 28 and the control gap 25 which becomes ionized and conducts. The output voltage generated at secondary 27 causes an arc across the igniter plug 29 such as of a jet or gas turbine engine and the condenser 20 discharges through the control gap 25, winding 27 and through the pre-formed arc of the ignition gap 29. The voltage across the condensers 20, 31 then falls and the gaps 25, 36 are de-energized such that the cycle is repeated. The diodes 16, 19 are protected against damage by limiting resistors 21, 22. The voltage doubling circuit may be replaced by a rectifier, Specification 1330504 is referred to.
Patent GB-1127737-A (GB)
Title: Improvements in or relating to seals for galvanic cells
IPC: H01M2/12
Filed: 1965-10-28
Abstract: 1,127,737. Batteries. UNION CARBIDE CORP. 28 Oct., 1965 [22 March, 1965], No. 45618/65. Heading H1B. A sealed cell is provided with a rupturable seal comprising an annular plastics gasket 30 positioned between the central terminal 34 and a vented cover 32 and also between the cover 32 and the cell container 12, a yieldable annular metal back-up washer 38 in contact with the gasket, and a bowed annular metal washer 42 having a plurality of radially inwardly directed teeth 44 in contact with the undersurface of the washer 38. On rise in pressure gasket 30 is deflected longitudinally outwardly displacing back-up washer 38 so that the teeth 44 slide on the washer 38 and then pierce a vertical wall 54 of the gasket. A false cover 45 is provided to prevent escape of electrolyte on venting. The cell comprises a metal container 12, with an insulating jacket 14 enclosing a gelled anode 16, a gelled electrolyte 17, a cathode 18 and separator 20.
Patent GB-1484873-A (GB)
Title: Delineating a pattern in a negative resist composition
IPC: C08G59/00
Filed: 1974-10-23
Abstract: 1484873 Electron sensitive processes WESTERN ELECTRIC CO Inc 23 Oct 1974 [23 Oct 1973] 45812/74 Headings G2C and G2X  A process for producing negative resists comprises (1) imagewise exposing to electron beams or x-rays a material comprising a support and a layer of an uncured polymer which contains an ethylenically unsaturated main chain with branches of aliphatic groups at least some of which contain cross-linkable epoxy groups connected to the main chain through at least one atom and there being at least one epoxy group per 5 monomer units; the weight average molecular weight (M n ) being 10<SP>3</SP> to 10<SP>6</SP> and the ratio M w :M n  is less than 5, M n  being the number average molecular weight; the lower temperature limit of the glass transition temperature range (Tg) being below the lowest temperature of the material before exposure, and (2) removing the unexposed and uncross-linked areas with a developer. Specified polymers are  poly'glycidyl acrylate, glycidyl methacrylate/ethyl acrylate copolymers and polymers which contain vinyl ferrocene which acts as an x-ray absorber, the polymers preferably having a Tg below 22C. Polyglycidylmethacrylate (Tg = 46C) is stated to be unevitable. The developed resist may be post baked for 5-30 minutes at 60-130C to increase cross-linking. The resist may be stripped off the support by hot (50C) chromic acid solution or by an oxygen plasma at 300w., 25 milltorr. pressure.
Patent GB-1334964-A (GB)
Title: Process for the demethylation of 3-amino macrolides
IPC: C07H17/08
Filed: 1971-10-01
Abstract: 1334964 N-Demethylating macrolide antibiotics ABBOTT LABORATORIES 1 Oct 1971 [2 Nov 1970] 45905/71 Heading C2A The 3-dimethylamino group of the desosamine or mycaminose moiety of a macrolide antibiotic is mono- or di-demethylated by treating the macrolide with 1 to 5 equivalents of bromine or iodine in an inert solvent which dissolves the reactants but does not react with them and in the presence of sufficient of a base which does not reduce the bromine or iodine nor react at an appreciable rate with the aglycone portion of the antibiotic to maintain the pH from 8 to 10 during the course of the reaction. The antibiotics specified are erythromycin A, B and C, griseomycin, methymycin, neomethymycin, narbomycin, oleandomycin, picromycin, plicacetin, carbomycin A and B, spiramycin I, II, and III and leucomycin. The base is preferably an alkali metal alkoxide or carboxylate e.g. sodium methoxide, sodium acetate, sodium propionate or sodium benzoate. The inert solvent may be methanol, dioxan, tetrahydrofuran, dimethylacetamide or dimethylformamide or the corresponding aqueous solvent. After the reaction, the mixture is added to water at alkaline pH, and the product is extracted therefrom with an immiscible solvent e.g. CHCl 3 , purified by chromatography, the solvent evaporated and the residue is recrystallized.
Patent GB-1538174-A (GB)
Title: Cleaning composition
IPC: C11D1/75
Filed: 1976-11-05
Abstract: An improved cleaning composition, comprising an amine oxide, an alkylether sulphate, casein and optionally other nonionic detergent compounds and an organophosphorus compound. The composition, which is free from alkylbenzene sulphonates, alkyl sulphonates and alkyl sulphates, has improved drain-dry properties and improved mildness properties.
Patent GB-1216570-A (GB)
Title: Apparatus for dehorning animals such as cattle
Inventor: KAVANAGH JAMES KEVIN
IPC: A01K17/00
Filed: 1968-09-30
Abstract: 1,216,570. Dehorning apparatus. J. K. KAVANAGH. 30 Sept., 1968 [13 Oct., 1967], No. 46360/68. Heading A5R. An apparatus for dehorning animals comprises a framework 1 adapted to engage the horn, and a cutting blade 8 slidably mounted within the framework 1, said cutting blade 8 being mounted upon a shaft 10 housed within the barrel of a gun mechanism 12, of the type as is conventionally embodied in a gun using conventional ballistic cartridges, for forward movement of the cutting blade 8 on actuation of the gun mechanism 12. In a modification (Fig. 3, not shown) the cutting blade (8) is mounted upon a pair of shafts (16) which are housed, one in each of twin barrels (17) of a gun mechanism (18). In such a modification both barrels can be fired simultaneously or singularily. The framework 1 comprises a pair of bars 2 and 3 bridged at their ends by supporting members 4 and 5; member 4 being shaped at 13 to engage the horn to be cut whilst member 5 supports the gun mechanism. On each of the bars 2 and 3 of the framework is provided a damping means 6 to minimise vibration of the cutting blade after actuation of the cutting blade propulsion means.
Patent GB-957120-A (GB)
Title: Heat treating of liquors containing dissolved solids
IPC: C02F1/10
Filed: 1961-12-29
Abstract: 957,120. Distilling water. E. A. J. MROZ. Dec. 29, 1961 [Jan. 5, 1961], No. 46598/61. Heading BIB. In a process for the distillation of liquor containing dissolved solids which form scale on heating surfaces, e.g. sea water or industrial waste water, a stream of the liquor is contacted with hot gas, and the mixture of gas and vapour so produced is brought into contact with a further stream of the liquor in order to condense the vapour and thereby obtain a warm diluted liquor which is suitable for distillation without excessive scale-formation. Hot gases at a pressure of 100 p.s.i. are generated by burning methane in chamber 70 with excess compressed air, supplied from compressor 74 which is driven by gas-turbine 72. The combustion gases pass through after-burner 76, where additional fuel is burned and the temperature is raised to 3000 ‹F., and are then introduced through line 20a into contactor 12a. Raw water is pumped through line 10a and spray-nozzles 14a into the top of contactor 12a, and some of the water is vaporized by the hot gases. Excess water is withdrawn via line 24a. The mixture of gas and steam leaving contactor 12a is freed from entrained water in separator 30a, and is then passed through line 34a into contactor 36a, which is supplied with sprays of water by lines 52,51a<SP>1</SP>, 52a<SP>11</SP>. If desired, the water supplied by these three lines may come from different sources, e.g. the water supplied by line 52 may be warm water from a previous contacting operation. Warm water under pressure is withdrawn via line 24a<SP>1</SP>, any precipitated solids being retained by filter 101. Gases, withdrawn from the top of contactor 36a, are passed through gas / liquid separator 30a, and are then discharged via pressure-control valve 84a.