baber/WOPTO huggingface dataset:
Patent GB-191687-A (GB)
Title: Improvements in treating certain waste liquors and obtaining valuable products therefrom
IPC: C01C3/12
Filed: 1922-07-21
Abstract: The waste liquor from aniline black dyeing in which ferrocyanide is used, is treated with ferrous sulphate so as to obtain a blue precipitate as described in the parent case, and the blue precipitate is separated and dissolved by means of an alkali, alkaline earth, or ammonia.  The iron hydrate also produced is separated from the solution and the ferrocyanide is obtained by crystallization from the filtrate.  Specifications 3072/89 and 188,208 are referred to.
Patent GB-1139556-A (GB)
Title: Production of unsaturated isobutylene graft copolymers
Inventor: DAUMILLER GUENTHER
IPC: C08F279/02
Filed: 1966-05-06
Abstract: 1,139,556. Graft polymers. BADISCHE ANILIN- & SODA-FABRIK A.G. 6 May, 1966 [8 May, 1965; 26 June, 1965], No. 20022/66. Heading C3G. 5 to 95% by weight of isobutylene is grafted on to 95 to 5% of a diene polymer with a molecular weight of 1500 to 5,000,000 which contains 1 to 0À000001 halogen atom per monomer unit in the presence of 0À000001 to 5%, based on the total weight of isobutylene and diene polymer, of a Lewis acid at -150 to -30 C. at a pressure of 1 to 10 atmospheres. The diene polymer may be a homo- or copolymer into which halogen is introduced after polymerization or during polymerization, in the latter case by use of a halogen-containing monomer, e.g. chloroprene, a chloropropene or allyl chloride. The diene, polymer and isobutylono may be dissolved in a solvent prior to reaction. In the examples, the diene polymers used are polybutadienes, which may be oils, containing a small percentage of Br 2 , C1 2  or I 2 ; a butadiene/2-chloropropene copolymer; an isoprene/2 - chloropropone copolymer - polychloroprene; a chlorinated butadiene/styrene copolymer; a brominated or chlorinated butadiene/α-methyl styrene copolymer or a chlorinated butadiene/α-methyl styrene block copolymer. The catalysts employed are TiCl 4 , SnCl 4 , VBr 4 , MoCl 5 , VOCl 3 , GaCl 3 , GaBr 3 , VCl 4 , NbCl 5 , AlCl 3 , BF 3 , SbCl 5 , FeCl 3 , TaCl 5 , MoCl 5  (C 2 H 5 ) 2 - AlCl, AlBr 3  and (C 2 H 5 ) 3 Al. The solvents used are toluene, liquid ethylene and n-hexane. The graft polymers may be vulcanized.
Patent GB-899131-A (GB)
Title: Improvements relating to selective circuits
Inventor: RUFF HAROLD ROBERT
IPC: G06K7/14
Filed: 1958-06-23
Abstract: 899,131. Sensing record cards. A.E.I. LAMP & LIGHTING CO. Ltd. June 19, 1959 [June 23, 1958], No. 20076/58. Drawings to Specification. Class 106 (1). The variation in resistance of a cadmium sulphide photo-electric cell subjected to illumination, the intensity of which changes between two predetermined levels and connected in series with an electric discharge lamp and a source of operating voltage is utilized to control the energization and de-energization of the lamp. Described in connection with a matrix of cells and a similar matrix of lamps (which may be remote from the cell matrix) for connecting the pattern of holes in a punched card into a corresponding pattern of energized discharge lamps.
Patent GB-1044992-A (GB)
Title: Pulse modulated carrier wave transmitter
IPC: H04B10/00
Filed: 1964-05-14
Abstract: 1,044,992. Lasers; pulse modulation systems. INTERNATIONAL BUSINESS MACHINES CORPORATION. May 14, 1964 [May 17, 1963], No. 20096/64. Headings H3B and H4L. A pulse modulated carrier wave transmitter comprises a semi-conductor laser the input current of which is pulse-modulated in accordance with the amplitude of an input signal. An audio input signal applied to terminal 30 and amplified by transistor T1 is applied to the base of transistor T2 so that the current on line 34 is modulated in accordance with the audiomodulated input signal. The capacitors of L-C delay line 36 are charged by the modulated current on line 34 until the voltage across PNPN diode 40 is sufficient to cause this diode to break down and a pulse to be passed to semi-conductor laser diode 42 so as to switch the diode to its lasing condition. At the end of the output pulse on line 41 the PNPN diode 40 is switched back to its high impedance state by feeding a positive pulse to the base of transistor T2 to reduce the emitter/collector current of transistor T1 to zero and hence also the current flowing through diode 40. After restoration of the switch 40 the capacitors of delay line 36 begin to recharge through the transistor T2 so that a PFM signal corresponding in information content to the audio modulated input signal is generated on line 41. The radiation output from the laser is thus an optical PFM signal embodying the information carried on the audio input signal. The amplitude characteristics of the input signal correspond to the pulse repetition rate of the PFM signal and frequency characteristics of the input signal are embodied as the rate of change of the pulse repetition rate. The laser may be a gallium-arsenide diode.
Patent GB-162972-A (GB)
Title: Improvements relating to liquid air motors
IPC: F01B17/02
Filed: 1920-07-09
Abstract: 162,972. Buck, E. C. July 9, 1920. Vapour - engines -A motor a is driven by liquid air which is passed in a stream from a valve-controlled reservoir b along a channel f heated electrically as by one or more electric arcs g, or sparking-plugs connected by leads h to the poles of a dynamo.
Patent GB-620163-A (GB)
Title: Drafting machine with drawing board
IPC: B43L13/02
Filed: 1946-07-05
Abstract: 620,163. Draughting-machines. RUEDI, O. July 5, 1946, No. 20164. [A Specification was laid open to inspection under Sect. 91 of the Act,s, Jan. 6, 1947.] [Class 97 (iii)] A vertical member 6, Fig. 1, adapted to traverse the drawing-board 1 horizontally and serve as a guide for a drawing instrument, is mounted at one end only on a carriage 5 supported on a runway 2 extending along a horizontal edge of the board by means of rollers 3 ; the rollers are mounted on antifriction bearings and, as shown in Fig. 2, have curved peripheries whereby each roller is guided by the runway 2 of U-section at two opposite points. A member 8, having a hole 9 and a slot 10, in either of which a pencil may be inserted, is slidable in a channel 7 in the member 6. A scale 12 is adjustably mounted in a slot 11. A parallelogram guide 14 for an angularly adjustable square 15 is secured to the vertical member 6, or may be adjustably mounted in a further channel, not shown. In a modification, Fig. 5 (not shown), the square, instead of being mounted on a parallelogram, is adapted to slide along the lengthwise channel 7 in the vertical member and to be frictionally retained in any position. The corner of the square is arranged to serve as a rest for the pencil point. One limb of the square carries a protractor and at least one angularly adjustable ruler co-operating with it.
Patent GB-919604-A (GB)
Title: Improvements in flame cutting machines
Inventor: BECHTLE RICHARD
IPC: B23K7/00
Filed: 1960-06-08
Abstract: 919,604. Electric copying machines. MESSER G.m.b.H., ADOLF. June 8, 1960, No. 20196/60. Class 38 (6). [Also in Group XXII] In a flame-cutting machine in which a photo-electric device is mounted on two carriages 1, 3 for Y and X movements and follows a drawing 5 to guide a torch 7 over the work, a second photo-electric device 12, mounted on a carriage 10 in turn carried by the common Y as in carriage 1, follows a second drawing 14 to simultaneously guide a marking head 11 over the work for marking out bolt-holes &c. The marking head 11 may carry a paint-brush, electromagnetic centre punch, or a turret with 3 different shapes of marker with an ink pad. In the case of the centre-punch, short horizontal lines, e.g. 15c, are added to the second drawing and these are detected by a further photo-cell to energize the punch. In the case of the turret, a selected number of additional index marks are added to the second drawing ahead of the horizontal lines so as to be detected by yet another photocell which indexes the turret. It is stated that the machine can give multi-coloured marks.
Patent GB-1042025-A (GB)
Title: Magnetic recording and/or playback apparatus
Inventor: REED GORDON HOWARD
IPC: G11B23/04
Filed: 1962-05-25
Abstract: 1,042,025. Driving endless tapes. TELEVISION RESEARCH Ltd. May 10, 1963 [May 25, 1962], No. 20277/62. Heading G5R. An endless magnetic tape is housed in a cassette 1 containing its own pinch-roller 9, supported by independent springs 12 allowing the roller to rock. A latch 21, Fig. 3, engages in a recess 20 in the lower cassette face 2. Antispill brake means 26, moving with one of the pinch-roller support springs are released as the roller 9 is pushed back by a machine capstan 10. The pinch-roller assembly is mounted on a plate 17 with a rebate 18 engageable with a hole in the cassette face 2, a pin 16, engaging the upper face 1 preventing its displacement. By dissembling the cassette, the pinch-roller assembly may be removed and the tape played on a machine with its own pinch-roller, entered through the hole otherwise accommodating the rebate 18.
Patent GB-673983-A (GB)
Title: Improvements in or relating to low-frequency amplifying circuit-arrangements with tone control
IPC: H03G9/08
Filed: 1949-08-04
Abstract: 673,983. Tone adjusting circuits. PHILIPS ELECTRICAL, Ltd. Aug. 4, 1949 [Aug. 7, 1948], No. 20321/49. Class 40 (iv). [Also in Group XL (b)] In an audio - frequency volume control circuit having a low-frequency rejection filter  15, 16 and a high-frequency pass filter 18, 19 which together enable the low and high frequencies to be emphasized relative to the intermediate frequencies at low volume settings of a potentiometer 4, a resistor 41 connected between the filter 15, 16 and the potentiometer slider 6 enables variation of the emphasized low frequencies to extend over the potentiometer section below a fixed tapping 12. An embodiment is described, Fig. 2 (not shown), in which the additional resistor is included in the amplifier circuit disclosed in Specification 673,982, [Group XL.(c)].
Patent GB-257876-A (GB)
Title: Improvements in slippers and similar foot-wear
IPC: A43B3/10
Filed: 1926-08-18
Abstract: 257,876. Otto, P. Aug. 18, 1926. Slippers; connecting uppers to insoles and soles.-In a slipper or the like, the edges of the upper a, Fig. 2, are connected by stitches carried under and across the insole b, and in addition pasted thereto and to the outer sole. The outer sole is composed in known manner of a felt layer d and a leather tread e secured by stitches f. This sole is placed over the turned edges of the upper and secured by paste, the centre of the sole being left free.
Patent GB-984134-A (GB)
Title: A booster
IPC: F15B3/00
Filed: 1961-06-06
Abstract: 984,134. Hydraulic intensifiers. REGIE NATIONALE DES USINES RENAULT. June 6, 1961 [July 28, 1960], No. 20392/61. Addition to 858,577. Heading F1P. A booster comprises a large diameter piston 4 elastically mounted on a small diameter piston 18, one of the pistons having a seal 6 engaging its cylinder, the cylinder, at its lower end having a seal 11 engaging the piston so that air compressed in the chamber 35 between the seals during the downward movement of the pistons acts to return the pistons to their upper position. A chamber 27 between the pistons is connected by a conduit 36 and distributer (not shown) to the low-pressure supply port 3 for the piston 4 and by one or more orifices 26 having gauge filters 26<SP>1</SP> to the atmosphere. The distributer, during the upward stroke of the pistons connects the port 3 to the conduit 36 so that the air above the piston 4 passes through the conduit 36, chamber 27 and orifices 26 to atmosphere. Air can be supplied through an orifice to the chamber 35 to compensate for loss of air or to provide further pressure if the pistons do not return to there upper position solely by the expansion of air in the chamber. A reservoir 22 of oil for the high pressure piston 18 is connected by a passage 43 to a chamber 42 having a transparent window by which the degree of filling of the sump can be ascertained. The chamber is connected by a needle valve 39 to atmosphere.
Patent GB-243448-A (GB)
Title: Improvements in or relating to wireless direction finding systems
IPC: G01S1/02
Filed: 1924-08-29
Abstract: 243,448. Smith, R. T. Aug. 29, 1924. Bearings and distances, determining; directive signalling. - A power-driven switch is used for comparing separate audible signals in wireless direction-finding systems, particularly those of the kind described in Specifications 134,560 and 243,449. Preferably the switch is associated with a device for indicating what circuit connection is made. Fig. 1 shows the circuits employed, and Fig. 2 the mounting of the switch driving-mechanism and other apparatus. The main aerial coil is connected to the terminals 1, and an auxiliary aerial coil at right angles to the main coil is connected to the terminals 2. The amplifier and telephones are connected to terminals 3, across the tuning-condenser 4. The rotary switch has three positions, in which it connects the terminals 6, 8 to the terminals 10, 11; 7, 9: and 12, 13 respectively. In the first position, the two aerials are connected in series with each other and with the condenser 4. In the second position, the aerials are still in series but the connections of one are reversed. In the third position, only the auxiliary aerial 2-2 is in circuit, and a variometer 5 is switched in to maintain the tuning constant. A loading-coil 29 and short-circuiting switch 30 allows a different range of wave-lengths to be received. The rotary member of the switch comprises a drum engaged by eight fixed contact springs. The drum is rotated by worm gear from a vertical shaft 18 driven through bevel gearing by a windmill 19; or an electric motor, clockwork, or other means, may be employed to drive the switch drum. A casing 22, enclosing the shaft 18 and carrying the windmill 19, may be turned into a suitable position by a handle 24 and locked by a clamp 25. The variometer 5 and tuning-condenser 4 may be mounted in the switch casing 14 and controlled respectively by handles 5<1>, 4<1>. A pointer 28 on the shaft of the switch drum moves over a dial 27 divided into three differently-coloured sectors, thus indicating the changing circuit connections. Alternatively, the indicator may comprise electric lamps. When the device is used on aircraft, red and green sectors may correspond to the two series connections of the main and auxiliary aerials, and a white sector to the position in which only the auxiliary is in circuit. If signals are louder for the red sector than for the green, it is necessary to turn to port to produce equality ; and vice versa. The aircraft may thus be kept head on to the transmitter. When the aircraft arrives in the neighbourhood of the transmitter, signals become audible during the ' white ' periods. These increase in intensity until approximate equality of signal strength is obtained for all three sectors, when the craft is directly over the transmitting aerial, as described in Specification 243,449.
Patent GB-1185107-A (GB)
Title: Sewage Treatment Processes
IPC: C02F3/02
Filed: 1967-05-03
Abstract: 1,185,107. Treating sewage. FMC CORP. 3 May, 1967 [4 May, 1966], No. 20478/67. Heading C1C. An activated sludge process is characterized by commingling a phosphorus-containing influent sewage with a phosphorus-depleted recycle sludge until the phosphorus is transformed to removable phosphates. The mixed liquor has at least 60 parts per weight of suspended solids per part of phosphate-containing material while under aeration to remove BOD. The phosphates formed are washed out of the sludge at pH 3À5 to 6À0 before recycling to the aeration stage. Sludge may be aerated in a holding zone before recycle.
Patent GB-365105-A (GB)
Title: Improvements in the obtaining of effluents free from phenols in coke oven plants or the like
IPC: C10K1/18
Filed: 1930-07-07
Abstract: 365,105. Gas washing processes. RASCHIG GES., DR. F., Ludwigshafen-on- Rhine, Germany. July 7, 1930, No. 20568. Convention date, July 6, 1929. Void [Published under Sect. 91 of the Acts]. [Class 55 (ii).] The Specification as open to public inspection under Sect. 91 (3) (a) of the Acts, describes a process for removing phenols from combustible gases by washing in countercurrent with a solvent, the temperature of the gases being kept above their dew point. The gases are preferably freed' from their tar content, before contact with the wash liquor which may be benzole or a tar oil. In an example, coke oven gas having a temperature of 80‹ C. enters a tower half-filled with Raschig rings. Benzole is sprayed into the top of the tower, and about 90 per cent of the phenol content is removed. This subject-matter does not appear in the Specification as accepted.
Patent GB-902781-A (GB)
Title: Improvements in or relating to method and apparatus for making foamed resin structures
IPC: B29C44/30
Filed: 1959-06-16
Abstract: 902,781. Laminates. KOPPERS CO. Inc. June 16, 1959 [June 18, 1958], No. 20655/59. Class 140. [Also in Group V] Laminated foamed structures are made by placing facing materials, e.g. kraft paper, plastic sheet, metallic foil, paper board, hardwood board, plywood, vegetable board, cement-asbestos board or gypsum board, over the top and bottom of a mould 197 reciprocatable between the position shown in Fig. 1 and one hetween the upper and lower platens 13, 15 of a press 11 and having a series of holes 215 in one side wall for receiving probes 216 and a single hole 217 in the opposite wall for receiving a charging device 359 (Fig. 4). In the latter, a supply of compressed air through nozzle 361 causes a suction effect at intake 363 which draws expandable polymeric particles, e.g. polyethylene or polystyrene, from a container (not shown) and charges them into the mould cavity 213. Each probe 216 (Fig. 5), has a series of small spaced outlets 425 and is attached to a conventional steam header 391. The probes 216 are inserted part way into the cavity 213 while the mould is being filled to prevent loss of material through the holes 215, and then the whole way, after which steam is injected through the probes 216 for a predetermined time at a predetermined pressure. The probes 216 are finally retracted sufficiently rapidly for the expanded material to be free of core holes while simultaneously shutting off the injection of steam. Specifications 756,654, 849,117 and 850,477 are referred to.
Patent GB-215707-A (GB)
Title: Improvements in brushes
IPC: A46B3/16
Filed: 1923-08-15
Abstract: 215,707. Toledo Automatic Brush Machine Co., (Assignees of Jobst, C.). May 7, 1923, [Convention date]. Grant of Patent refused. Bristles, fixing.-Tufts of bristles secured in holes in the stock by staples are of a size to fill the holes and each staple is of greater width than the diameter of a hole so that it is embedded in the side walls thereof. In the construction shown, the staples D are formed of round wire with the prongs crossed. The staples may be embedded in the walls by the impact of the staple driver and the brush stock may be of resilient material.
Patent GB-1496176-A (GB)
Title: Rotors for rotary electrical machines
IPC: H02K1/16
Filed: 1975-05-16
Abstract: 1496176 Rotors of electrical machines ROBERT BOSCH GmbH 16 May 1975 [6 Dec 1974] 20792/75 Heading H2A A rotor 13, formed from edgewise-wound sheet magnetic strip or from stacked magnetic laminations, has winding slots 14 each of which, as seen in cross-section perpendicular to the rotor axis, extends radially of said axis and has a radially inner base portion 15 which is a segment of a circle and leads radially outwardly into a trapezoidal portion 17 in which the slot width widens radially outwardly and which merges into a radially outer rectangular portion 18 in which the slot has substantially constant width and which leads to a radially outer open top. The slots 14 are lined with electrically insulating paper 3 and receive an impregnated winding 20 of aluminium, e.g. formed by two coil portions with wires 21 and 22 respectively, the wires 21 being shaped prior to insertion so that the base portions 15 and at least the trapezoidal portions 17 are substantially filled thereby.
Patent GB-434754-A (GB)
Title: Improvements in and relating to brakes, particularly motor vehicle brakes
IPC: F16D51/50
Filed: 1934-07-16
Abstract: 434,754. Internal shoe brakes. DEUTSCHE PERROT - BREMSE GES., Friedrichsfeld, Mannheim, Germany. July 16, 1934, No. 20816. Convention date, Aug. 5, 1933. Addition to 416,630. [Class 103 (i)] The invention described in the parent Specification is modified to allow the brake cam lever 3 to move freely circumferentially with the shoes, when wear has occurred and the direction of rotation is reversed in order to avoid additional movement of the operating cable and snatching of the brakes. For this purpose the operating cable 4 is connected to an auxiliary lever 13 pivoted to the cover plate at 13 and engaging a guide surface 17 on the lever 3 by means of a roller 14. A lever 15 operated by the lever 13 on an extension of the lever 13 produces a radial thrust on the shoe 6.
Patent GB-1461294-A (GB)
Title: Screen printing
IPC: B41F17/34
Filed: 1974-05-10
Abstract: 1461294 Screen printing NETZSCH MASCHINENFABRIK Gebr 10 May 1974 [15 May 1973] 20823/74 Heading B6C Articles 4 are screen printed in multi-colour by providing a plurality of offset surfaces 7 carried on a conveyor 8, and a plurality of screen printers 1 applying different colours to the offset surface. The individual colour images are applied to successive articles 4 during one cycle of travel of article conveyor 9, images of different colours being applied during the next cycle of travel. This may be achieved by varying the relative speeds of conveyors 8 and 9, or by carrying a different number of articles 4 on conveyor 9 to the number of offset surfaces. The offset surfaces may be pivoted as at 5 to conveyer 8, and be pivoted as shown at the right-hand end and be pressed into contact with the article by pressure member 2. The articles may be passed through drying oven 6.
Patent GB-188384-A (GB)
Title: Improved process of grinding, smoothing and finishing glass preparatory to polishing
IPC: B24B7/24
Filed: 1921-08-05
Abstract: 188,384. Kann, W. L. Aug. 5, 1921. Supplying abrading-materials.-A method of grinding, smoothing, and finishing glass, particularly optical glass, preparatory to polishing comprises supplying to the glass a natural crystalline abrasive of such character that, as it is crushed and broken, the smaller grains thereby produced are of crystalline form and adaptable for abrasive purposes, and continuously collecting grading and supplying to the glass such crushed and broken abrasive. Garnet is beat suited for this purpose, the crystalline form being better than the massive form termed almandite. Corundum may also be used. The coarse garnet, which has been crushed, sized, and freed from impurities is fed in a single batch on to a table for the coarse grinding, after which operation the next grade of material is used and the operations are continued in successive steps, there being no necessity to wash off the table between these steps. The smoothing is carried to completion by the finer grades of garnet obtained from the previous steps.