baber/WOPTO huggingface dataset:
Patent GB-646581-A (GB)
Title: Improvements in or relating to direct-current voltage amplifiers
IPC: H03F3/36
Filed: 1947-10-22
Abstract: 646,581. Valve amplifying circuits. PHILIPS ELECTRICAL, Ltd. Oct. 22,1947, No. 28294. Convention date, Oct. 25, 1946. [Class 40 (vi)] In a D.C. amplifier in which the input is applied over a mechanically-operated switch in one position, a voltage derived from the output is fed back over a short time constant circuit to the amplifier when the switch is in the other position. A double-pole switch 4, 5 alternately connects the input 1, 2 to the grid circuit of valve 6 and the feed-back path comprising resistors 9, 10 and capacitor 11. The time constant of the feed-back path is made short compared with switching time, while the time constant of the combination 10, 11 is long. Preferably the ratio of the time during which the switch is connecting the input 1, 2 to the time when the feed-back path is completed, exceeds five. In a modification, Fig. 2 (not shown), a single pole switch is employed.
Patent GB-346253-A (GB)
Title: Improvements in match packages
IPC: A24F27/20
Filed: 1930-09-23
Abstract: 346,253. Match packages. JOHANSSON, J. W., Sj÷akra, Bankeryd, Sweden. Sept. 23, 1930, No. 28405. [Class 94 (i).] A match package comprises a row of matches 1, integrally connected to a base strip 2, the matches being folded about a line 4 situated between their head and base portions, and the heads 5 approximating to the line 6, to enable them to be grasped at the fold and torn off for use. Perforations &c. 3 are preferably provided to aid detachment. Striking surfaces 9, 10 may be provided for the automatic ignition of the matches on withdrawal, the pressure being obtained by staples &c. connecting the two opposing surfaces of the base strip which is, for this purpose, made wider than the row of matches. Adhesive may also be used in the fold 8 to overcome the elasticity of the material. The package may be totally enclosed in an outer cover, or may be attached to a cigarette box.
Patent GB-364093-A (GB)
Title: Improvements relating to electron discharge devices such as electric rectifying tubes and the like
IPC: H01J17/04
Filed: 1930-09-23
Abstract: 364,093. Discharge apparatus. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13A, Emmasingel, Eindhoven, Holland. Sept. 23, 1930, No. 28468. Convention date, Jan. 18. [Class 39 (i).] In an electron-discharge tube such as a rectifying tube, the anode or anodes is located in an arm 2 or part of the bulb of restricted cross section, and the part of the anode or anodes which is attached to or comes in contact with a supporting member or other part of the device is connected to the discharge space only by a long path which is of small cross section at at least one place, the anode occupying substantially all the cross section of the arm or extension in the bulb. The lead-in 4 to the anode 3 passes through a sleeve 5 of steatite which is attached to the anode in its upper bored extremity, and, in Fig. 2, a spider 9 carries centrally-perforated spaced mica discs 8 which surround the anode 3 and may leave only a small clearance 10. In Fig. 4, the anode is closely surrounded by the wall of the arm 2 which is provided with an enlargement 11 just below and at the active part of the anode which may be hollowed out to increase the active area. In Fig. 5 the anode is provided with a shoulder 13 and flange 12 in which the flange 14 of a mica member 1 depends, the member 8 being carried on a spider 9.
Patent GB-486073-A (GB)
Title: Improvements in or relating to the manufacture of dry selenium rectifiers for electric current
IPC: H01L21/108
Filed: 1937-10-19
Abstract: 486,073. Asymmetrically - conducting resistances. SIEMENS - SCHUCKERTWERKE AKT.-GES. Oct. 19, 1937, No. 28495. Convention date, Oct. 19, 1936. [Class 37] Selenium rectifiers have a blocking layer of sulphur on the semi-conductor formed by exposure to sulphur vapour, this operation preferably taking place simultaneously with the conversion of the selenium to the crystalline state.
Patent GB-1135896-A (GB)
Title: Pyrano pyridines and process for their production
IPC: C07D491/14
Filed: 1967-06-20
Abstract: 1,135,896. Substituted pyrano - pyridines. WARNER-LAMBERT PHARMACEUTICAL CO. 20 June, 1967 [28 June, 1966], No. 28514/67. Heading C2C. Novel compounds of Formula I wherein R 1  is di-aralkylamino, C 1-6  alkyl-arylamino, hydroxy, di-C 1-6  alkylamino, pyrrolidino, morpholino, or piperidino; R 2  is hydrogen C 1-6  alkyl, cycloalkyl, aryl or aralkyl; R 3  is hydrogen, C 1-6  alkyl, cycloalkyl, aryl or acyl; R 4  is hydrogen, C 1-6  alkyl, cycloalkyl, or aryl; Z is an aromatic nucleus and R 5  is hydrogen, halogen, nitro, C 1-6  alkoxy, amino, dialkylamino, acylamino, C 1-6  alkyl or aryl are prepared by reacting a compound of Formula II or the enamine derivative thereof formed from an amine R 6 NH(R 7 ) with an amino alcohol of Formula III wherein R 6 , R 7 , R 8  and R 9  are hydrogen, C 1-6  alkyl, aralkyl or aryl or taken together with the N atom to which they are attached form part of a ring system, and when required (a) when said enamine derivative is used converting R 3  from hydrogen to C 1-6  alkyl, cycloalkyl or acyl or from acyl to hydrogen and/or (b) converting R 1  from the nitrogen containing radical to hydroxy.
Patent GB-409592-A (GB)
Title: Improvements in and relating to the production of artificial stone compositions
IPC: C04B22/12
Filed: 1933-10-16
Abstract: The gauging liquid employed in mixing an artificial stone material containing cement consists of a dilute solution of hydrofluosilicic acid to which an alkali such as caustic soda has been added in sufficient quantity to give a definite alkaline reaction.  In an example commercial hydrofluosilicic acid of strength 25-30 per cent and alkali of strength 23-27 per cent are employed.  The resulting product is diluted 40 to 100 times and 2-10 per cent of the diluted liquor is added to the mixing water.
Patent GB-1122175-A (GB)
Title: Polyurethane compositions
IPC: C08G18/70
Filed: 1966-06-27
Abstract: A polyurethane-forming composition comprises an hydroxyl-terminated prepolymer which is the reaction product of an organic polyisocyanate and a stoichiometric excess of at least one polyhydroxy ether, polyhydroxy ester or polyhydroxy alcohol, 0.01 to 3.0% by weight of the composition of an amine catalyst, 0.1 to 2.0% by weight of the composition of a silicone nucleating agent, 0 to 1% by weight of the composition of a metallic drying agent and an organic polyazide capable of decomposition into the corresponding isocyanate and nitrogen gas, the polyazide being present in an amount of 0.6 to 1.4 equivalents per equivalent of unreacted hydroxy groups in the prepolymer.  Preferred organic polyazides are succiny dliazide, malonyl diazide, adipyl diazide, terephthaloyl diazide, isophthaloyl diazide and trimellinoyl triazide. Suitable nucleating agents are the silicone oils and particularly alkyl-silane polyoxyalkylene copolymers and polydialkyl siloxanes.  The drying agent may be tin octoate, lead octoate, cobalt naphthenate, dibutyl tin dilaurate, cobalt octoate and manganese octoate.  The composition may be dissolved in a volatile organic solvent.ALSO:A polyazide of the formula <FORM:1122175/C2/1> may be prepared by heating 3 moles of terephthalic acid with 1 mole of trimethylolpropane followed by conversion of the product to the acid chloride and then to the azide in a conventional manner.ALSO:Substrates of metal, wood, paper, plastics, or glass may be coated with a polyurethane-forming composition consisting of a hydroxyl terminated prepolymer which is the reaction product of an organic polyisocyanate and a stoichiometric excess of at least one polyhydroxy ether, polyhydroxy ester or polyhydroxy alcohol, 0.01 to 3% by weight of the composition of an amine catalyst, 0.1 to 2% by weight of the composition of a silicone nucleating agent, 0 to 1% by weight of the composition of a metallic drying agent and an organic polyazide capable of decomposition into the corresponding isocyanate and nitrogen gas, the polyazide being present in an amount of 0.6 to 1.4 equivalents per equivalent of unreacted hydroxy groups in the prepolymer optionally in the presence of a volatile organic solvent.  On heating the coating surface up to 180 DEG C, the solvent is evaporated and the polyazide decomposed to form the corresponding polyisocyanate which cross-links the prepolymer.  The coating may be porous or non-porous depending on its thickness.
Patent GB-1475381-A (GB)
Title: Tungsten-halogen lamp
IPC: H01K1/56
Filed: 1974-06-27
Abstract: 1475381 Electric incandescent lamps GTE SYLVANIA Inc 27 June 1974 [13 July 1973] 28687/74 Heading H1F A tungsten-halogen incandescent lamp contains a piece of tantalum for gettering oxygen and hydrogen, the piece being so located within the lamp envelope that in use the temperature of the portion which is used for gettering lies between 300‹ C. and 450‹ C. The tantalum may consist of a foil welded between a tungsten inner lead and a molybdenum strip embedded in the pinch seal, access to the foil by the fill gas being obtained through a void between the inner lead and the quartz material of the pinch. Alternatively the tantalum may be in the form of a wire or foil embedded in the pinch and projecting into the envelope.
Patent GB-1452244-A (GB)
Title: Separation of m- or p-cresol from a mixture of m and p-cresol
IPC: C07C67/00
Filed: 1975-07-08
Abstract: 1452244 Separation of m- or p-cresol SUMITOMO CHEMICAL CO Ltd 8 July 1975 [12 July 1974] 28744/75 Heading C2C A method for separating m- or p-cresol from a mixture of m- and p-cresol comprises crystallizing the mixture under a pressure of not less than 300 atmospheres, the mixture having a composition which is not within the range defined by the two compositions corresponding to the two eutectic points of a mixture of m- and p-cresols at the pressure used.
Patent GB-302770-A (GB)
Title: Manufacture of new ortho-oxyazo-dyestuffs and an intermediate product
IPC: C09B45/16
Filed: 1927-10-28
Abstract: 302,770. Imray, O. Y., (I. G. Farbenindustrie Akt.-Ges.). Oct. 28, 1927. 2 : 8 - Dioxynaphthalene-6-carboxylic acid is prepared by fusing 2-naphthol-8-sulpho-6-carboxylic acid with caustic alkali. Specification 291,965 is referred to. o-Oxyazo-dyes are obtained by combining aromatic oxydiazo compounds with the above intermediate. They are mordant dyestuffs dyeing wool brownish tints turning to fast brown to black shades when after-chromed. Diazo compounds of the following are specified :-4-chlor-2- aminophenol. 4-nitro - 2 - aminophenol, p-nitro-oaminosalicylic acid, picramic acid, 5-nitro-3- amino - p - cresol, p-chlor-o-nitro-o-aminophenol, nitroamino-phenol sulphonic acids, o-aminonaphthol sulphonic acids and o-hydroxyaminoazo compounds.
Patent GB-940762-A (GB)
Title: Recovery of fluid hydrocarbons from an underground formation
Inventor: WINKLER ADOLPH KARL
IPC: E21B43/24
Filed: 1962-07-26
Abstract: 940,762. Wells. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. July 26, 1962, No. 28793/62. Heading E1F. Hydrocarbon fluids are recovered from a formation by reducing the pressure of a hot water flow, and passing the resultant steam and water mixture through the formation. Hot water from a heater 7 passes through a restriction 11, such as a flow bean or valve, to reduce the pressure prior to injection as the mixture into the formation 5 through tubing 4 of the well 1. Injection may take place through more than one well, and the fluids may be produced through one or more further wells, the injection continuing during production. The fluids may be produced through the well 1 by stopping injection after an interval, and by producing through the tubing for a further interval. The mixture may be injected into the upper part of the formation, and the fluids be simultaneously produced from the lower part of the formation, the same well being used for injection and production. The restriction may be at the lower end of the tubing, or the restriction may be dispensed with, the reduction of pressure occurring outside the lower end of the tubing.
Patent GB-380630-A (GB)
Title: Improvements in and relating to the winding and driving mechanism of clocks
IPC: G04C1/12
Filed: 1931-10-17
Abstract: 380,630. Clocks. SCHNEIDER, F., 12, Brauhausstrasse, Fulda, Germany. Oct. 17, 1931, No. 28920. [Class 139.] Winding apparatus, electric.-The disc 12 of a Ferraris or like mains motor is periodically released to wind the movement driving spring (or other means) by the rocking of a three-armed lever 3, 4, 11 pivoted at 2, and held in either of its two positions, determined by stops 5, 6, by a splay spring operating about the pivot 2. Each hour a pin 14 on the minute wheel 13 fast on a spindle 23, Fig. 2, rocks a two-armed lever A, B about its pivot 7, to lift the hammer 8, which, when the end A slips past pin 14, falls on the arm 4, rocks the lever 3, 4, 11 to the right, thereby releasing the disc 12 from the locking arm 11. The motor is geared to a wheel 15 of the driving spring casing 18 which is rotatably mounted on spindle 23, and carries pins 19, 20, engaging corresponding holes in a disc 22 mounted on a travelling nut 21. After one revolution of casing 18 which is held against backward rotation by a ratchet wheel 17 and pawl, a pin 16 on the disc 22 rotates a lever C about pivot 9 lifting a hammer 10, which, when released by the pin 16 slipping past arm C, falls on arm 3 and rocks the lever 3, 4, 11 to the left again to lock the disc 12. During running down of the spring the nut 21 travels along spindle 23 to the right. Should the mains supply fail, and, after the spring has considerably unwound, become again available, the motor will run until the nut 21 moves to the left sufficiently for the pin 16 again to engage the arm C when the spring will be fully wound.
Patent GB-1236803-A (GB)
Title: An ultrasonic defoaming bath and processes dependant thereupon
IPC: B01D19/02
Filed: 1968-06-18
Abstract: 1,236,803. Defoaming liquids. FUJI SHASHIN FILM K.K. 18 June, 1968 [14 Aug., 1967], No. 28947/68. Heading B1M. Liquid introduced at 14 is ultrasonically defoamed by passing over ultrasonically vibrating base plate 11 which is at an angle of 10-30 to the horizontal. Baffles 16, 17, 18, 19 are at an angle of 60-80 or 100- 150 to plate 11. The arrangement of the baffles causes the liquid to flow away from plate 11 at an acute angle to the plate.
Patent GB-294810-A (GB)
Title: Improvements in or relating to hats
IPC: A42C5/02
Filed: 1927-10-31
Abstract: 294,810. Horne, L. F. Oct. 31, 1927. No Patent granted (Sealing fee not paid). Leathers or sweat bands.-A sweat band mounting comprises a band e of grease-proof material between the hat leather d and the crown of the hat, and a doubled band f of grease-proof material attached to the lower edges of the bands d, e. This composite band is secured to the crown of the hat by adhesive. The band f may enclose the usual cane or other stiffener g. According to the Provisional Speci. fication an absorbent pad may be interposed between the crown and a grease-proof pad behind the leather.
Patent GB-1118291-A (GB)
Title: Improvements in or relating to electrical protection devices
IPC: H02H3/33
Filed: 1965-07-08
Abstract: 1,118,291. Protective systems. LABORATOIRE D'ELECTRONIQUE ET D'AUTOMATIQUE DAUPHINOIS (L.E.A.D.). 8 July, 1965 [15 July, 1964], No. 29070/65. Heading H2K. An earth leakage protective system comprises a capacitor 9 which is charged by a differential transformer 5 through a rectifier 7 and a voltage-dependent device 12 which breaks down to permit the capacitor to discharge through the coil of a magnetically-held tripping relay 11 to cause the relay to release. As shown, a further capacitor 10 and a rectifier 8 are provided so as to form a voltage doubler circuit. A tuning capacitor 14 and a voltage limiting and fault indicating diode, e.g. a neon tube 13 may be used. In an alternative arrangement, the diode 12 is connected across the relay coil 11 and the capacitor 9, Figs. 2 and 3 (not shown). An initial energization insufficient to release the relay may be applied to the relay coil, Fig. 4 (not shown). This increases the sensitivity but may be used to synchronize the relay operation with a current zero of the protected circuit, Figs. 5 to 7 (not shown).
Patent GB-504299-A (GB)
Title: Improvements in and relating to lighting arrangements of motor vehicles
IPC: B60Q1/124
Filed: 1937-10-25
Abstract: 504,299. Directing vehicle lamps. RYGOR, H. E. Oct. 25, 1937, No. 29081. [Class 75 (iii)] In means for directing a headlamp, or an auxiliary lamp from the steering gear, the lamp 1 is mounted on the upper end of a rod or tube 2 rotatable in a sleeve 3, in one direction, by means of a sheave 4 or the like connected by a Bowden wire 5 to the drop arm or other part of the steering gear and, in the opposite direction, by a spring 6. The sheave 4 is keyed on the tube 2 and is held by a spring 17 in the lower enlarged part 16 of the sleeve. The lamp may be turned through a greater or smaller angle than the front wheels by varying the point of attachment of the Bowden wire, and stops may be provided to limit the movement of the tube 2, a spring or other lost-motion device being provided in the Bowden wire mechanism. The- Bowden wire may terminate in a loop for engaging either a hook on the steering mechanism or a hook on the end of a second Bowden wire connected to a lever within the vehicle for manual operation. Reference has been directed by the Comptroller to Specification 243,248, [Class 75 (iii)].
Patent GB-236810-A (GB)
Title: Improvements in spinning, twisting and like frames
IPC: D01H7/50
Filed: 1924-12-04
Abstract: 236,810. Boyd, T. A., Boyd, H. A., Boyd, J., and Boyd, Ltd., J. & T. Dec. 4, 1924. Spindle apparatus.- In spinning, twisting, and like frames with flyers carried in an upper rail 1, a spindle or tube carrying a bobbin 5 is mounted on a lifting-rail 8 and driven positively by the flyer by means of a pivoted latch 12 which engages the legs of the flyer, or by means of a square spindle depending from the flyer and engaging a correspondingly shaped hole in the spindle or tube. The spindle or tube may be driven and the flyer driven therefrom by the means above described, and the flyer may be reciprocated and the spindle or tube mounted in a stationary rail. The spindle or tube may be mounted in a socket in the rail 8, or it may be mounted on a stud 9, Fig. 3, and prevented from rising by means of a flange 10<1> which engages beneath the rim of a drag collar 11 upon which the bobbin rests. The latch is maintained in the horizontal working position or in the vertical disengaged position by a spring plunger 13. Specification 7124/01 is referred to.
Patent GB-838837-A (GB)
Title: Anti-fogging device for dental mirrors
IPC: A61B1/253
Filed: 1958-09-10
Abstract: 838,837. Dental mirrors. O'HARA, S. E. Sept. 10, 1958 [May 12, 1958; Aug. 29, 1958], No. 29086/68. Class 81 (2). An antifogging device for a dental mirror comprises an air distributing housing 3 having an arcuate forward wall 7 adapted to extend around and above part, preferably at least 1/3 and less than ¢, of the periphery of a mirror 2 having a reflecting surface 2a, the housing having a chamber 16 therein and air outlet means, such as passages 17, in the wall 7 communicating with the chamber 16 and means for supplying air to the chamber 16 to cause air to flow through the outlets over the surface 2a. As shown in Fig. 1, air is supplied through a bore 21 in the handle 20 and shank 9, the mirror 2 is located against a shoulder 10 and supported by a clip 4, the ends 11 of which are anchored in the housing 3. In a modification, Fig. 6, the frame 49 of the mirror 48 is removably held in a groove 58 formed in the front wall 55 of the housing 46 and arcuate continuations 57 thereof and the air outlets may be holes 56 as shown or a slit extending across the wall 55. Alternatively, Fig. 3, the device may be detachably mounted on a conventional dental mirror by means of a clip 40 with arms 42 which support the mirror 24. The air supply means comprise a flexible tube 44 and stem 28.
Patent GB-920615-A (GB)
Title: Improvements in or relating to a direct current stabilisation
IPC: G05F1/52
Filed: 1960-08-23
Abstract: 920,615. Automatic current control. TESLA, NARODNI PODNIK. Aug. 23, 1960 [Sept. 16, 1959], No. 29097/60. Class 38 (4). [Also in Group XL (c)] A direct current stabilizing circuit comprises a resistance R 0  connected in shunt to a circuit including a reference voltage source B and further comprising a valve E 1  and a resistance R 1  connected as shown in parallel with a valve E 2  and resistance R 2 , the arrangement being such that the valve circuit has a negative resistance equal to the resistance R 0 . Should the supply voltage U 0  increase, the increase in current through resistance R 0  is equalled by the decrease in current through the valve circuit so that the load current remains constant. In operation, an increase in voltage Uy results in an increase in current i 0  through R 0  ; the increased voltage across R 0  will result in a proportional decrease of the negative bias of E 1  and an increase of current i 1  in E 1 . Consequently the voltage across R 1  increases, the potential across points 1 and 4 decreases and the current i 2  in E 2  decreases. The values of R 1  and R 2  are such that the variations of (i 1  + i 0 ) are completely compensated for by the variations of i 2  so that the total current through the load remains constant. To extend the range of control a third valve (Figs. 3 and 4, not shown) may be connected in series with the parallel stabilizing circuit. The resistance R 0  may be a potentiometer to the slider of which the load is connected.
Patent GB-1436288-A (GB)
Title: Drive mechanism
IPC: B62D11/08
Filed: 1974-07-01
Abstract: 1436288 Metal-working presses GULF & WESTERN MFG CO 1 July 1974 [29 Aug 1973] 29108/74 Heading B3H [Also in Division F2] A metal-working press comprises a reciprocable tool-supporting platen 12, a crank 14 for reciprocating platen 12 and a motor 30 which drives the crank through a belt 32, a clutchbrake drive mechanism 22 having a flywheel 28 and gears 20, 18. The clutch-brake mechanism comprises a set of clutch discs and a set of brake discs, these being operated by fluid pressure (Figs. 2 to 9, not shown). An inching worm and worm wheel drive can be provided for slow movement of platen 12 with the brake engaged (and a second brake disengaged) (Figs. 7 and 8, not shown).
Patent GB-664226-A (GB)
Title: A device for measuring the principal dimensions of erythrocytes
IPC: G01N15/02
Filed: 1949-11-14
Abstract: 664,226. Optical apparatus. VERVEEN, D. Nov. 14, 1949 [April 28, 1949], No. 29132/49. Class 97 (i). A device for determining the size of red blood corpuscles, by measurement of diffraction effects they produce, consists of a box 1, with an aperture 2 in one wall with a light source behind, a scale 3 with its zero at the edge of the aperture, a lens 9 mounted in the opposite wall, a mounting 11 for a slide 13 above the lens, and means for projecting light on to the scale for reading through the lens. The light source may be monochromatic or may be an incandescent lamp 6 with monochromatic filter 7. In the form shown the scale is illuminated by light from the lamp 6 reflected from a mirror 17 through a lens 19 carried in the wall of a compartment 18, reflected again from an adjustable mirror 20. When the aperture 2 is viewed through a blood specimen on the slide 13 and the lens 9 diffraction rings are seen and measured on the scale 3, the corpuscles size being calculated from a formula quoted in the Specification. Alternatively, the scale 3 may be calibrated to read the corpuscle size directly. To measure the corpuscle dimensions in different directions the mounting 11 is rotatable about the pivot 12. The rotation is measured by pointer 15 and scale 16. The pivot 12 is slidable to secure optimum visibility of the diffraction pattern.