baber/WOPTO huggingface dataset:
Patent GB-430743-A (GB)
Title: Improvements in or relating to automatic volume control for radio receivers
IPC: H03G3/26
Filed: 1933-10-21
Abstract: 430,743. Valve circuits for wireless reception. COLE, Ltd., E. K., Priory Crescent, Southend-on-Sea, and MARTIN, A. W., 1, Thames Close, Leigh-on-Sea. Oct. 21, 1933, No. 29190. [Class 40 (v)] A carrier frequency amplifying valve is used also as a D.C. amplifier for producing large A.V.C. voltages from the output of a diode rectifier which it feeds with carrier frequency energy. The valve may be part of a reflex circuit being arranged in addition to amplify low frequency signals. In one embodiment, Fig. 1, a carrier frequency amplifier 2 feeds a diode demodulator 10 followed by a low frequency amplifier 20. Part of the output from valve 2 is fed through condenser 15 to a diode 16 having a load resistance 4 arranged in the grid circuit of valve 2 and producing A.V.C. voltages in the latter. Amplified control voltages appear in the cathode resistance 5 of valve 2 and when the point X thereon becomes sufficiently negative the diode 21 becomes conducting and amplified A.V.C. voltages are fed through resistance 17, diode 21 and lead 22 to preceding amplifying stages. For interchannel noise suppression the cathode of diode 10 is arranged to be positive relative to its anode until the point X connected thereto reaches a predetermined negative potential. A reflex circuit embodying the invention comprises a combined carrier frequency, low frequency and D.C. amplifier valve 2 feeding a demodulating diode 5 and a further low frequency amplifier 15. The diode 5 produces demodulated signals in its load resistance 7 a proportion of which is fed back through condenser 10 to the grid of valve 2, the steady potential of which is also controlled over the filter 24, 27 from the load resistance 7. The low frequency output from valve 2 is developed across a network 13 in its anode circuit and fed through condenser 14 to the valve 15. Amplified A.V.C. is obtained from the point X in the cathode resistance 20 of valve 2 and fed through the diode 6 and resistance 23 to the preceding amplifiers. In a modification Fig. 3, (not shown) separate diodes are used for demodulation and the production of A.V.C. voltages. In a further modification Fig. 4, (not shown) a single diode performs the functions of the two diodes 16, 21 of Fig. 1, and the reflex valve is a pentode, the low frequency output being derived from the screening grid. In a further embodiment, Fig. 5, the A.V.C. diode 32 is fed from a highly selective filter 36 and the grids of the valves controlled from the point X in the cathode circuit of the carrier frequency and D.C. amplifier 31, may be prevented from assuming a positive potential by a diode 42 shunted across the A.V.C. supply. The demodulator diode 33 is biassed for interchannel noise suppression by connecting its cathode to that of valve 31 which becomes negative enough to release the diode 33 when signals of over a predetermined amplitude are received. Specification 407,317 is referred to.
Patent GB-1358078-A (GB)
Title: Thrust reverser for ducted fan jet propulsion engines
IPC: F02K1/60
Filed: 1971-06-22
Abstract: 1358078 Thrust reverser AERONCA Inc 22 June 1971 [26 June 1970] 29296/71 Heading B7G A ducted fan jet propulsion engine having one or more exhaust ducts surrounded by a fixed cowl 16 is provided with a thrust reverser comprising a movable cowl 18 and means for moving it between a position in which it forms a continuation of the cowl 16 and a position aft of the discharge of the duct(s), the cowl 18 carrying cascades of vanes 28 and a pair of arcuate thrust reversal shutters 22, 23 movable between a stowed position adjacent the walls of the cowl 18 and a deployed position when the cowl is in its aft position. The movable cowl 18 is secured to flanged rails 32 slidable in brackets 35 mounted on the exhaust duct walls, Fig. 5 (not shown): each rail also carries a T-shaped rack member 41 which can be moved axially of the engine by fluid motor 48 through flexible drive 47 and gearing 45 and is releasably secured to the rail 32 by a latch mechanism 53, Fig. 12, wherein a latch 54 mounted on the rail is spring-urged to engage the member 41, and is held thus by an angle member 61. As the rail 32 and member 41 are moved rearwardly by the motor 48, carrying with them the cowl 18 and the shutters, the angle member 61 engages the bracket 35 and is retained, releasing the latch 54 which rises to lock the rail to the bracket. The continued movement of the rack member 41 causes the shutters, which are connected by links 24 to fixed pivots 31 on the cowl 18 and by links 51, 52 to the rack member, to be deployed. When the cowl 18 is in its forward position the vanes 28 are covered by doors 30 pivotally mounted on the fixed cowl 16 and held closed by the engagement of arms 73 on cowl 18 with pins 74 on the doors. As the coil 18 is moved rearwardly the arms 73 cam the pins 74 outwardly and the doors are held open by spring- loaded hook arms 75.
Patent GB-536179-A (GB)
Title: Improvements in or relating to injection or extrusion moulding
IPC: B29C45/14
Filed: 1939-11-03
Abstract: 536,179. Injection moulding of wheels &c. TEGARTY, J. B. Nov. 3, 1939. No. 29317. [Class 87 (ii)] [Also in Group XXIV] Articles, e.g. steering wheels, are produced by successively forming by injection moulding of a synthetic plastic either in continuity or in spaced relation with connecting or separating elements moulded or interposed therebetween. As shown in Fig. 2, a section 50 of a steering wheel is injection moulded about a rim A and between separating elements 47 forming the ends of the mould. To accommodate the article, one of the machine tie-rods 40 is arched, as shown. The elements 47, which form enlargements at the outer ends of the spokes a, may be of metal or plastic and may be formed with recesses or projections to interlock with the moulded section. In a modification, Fig. 6, the plastic is moulded about the ends of the spokes in the form of enlargements 54 and the sections 52 are separated by members 55 which may also be formed by injection moulding or, as shown, may consist of semi-circular inserts secured by a bolt or rivet 57. The moulded sections may be of different colours. Fig. 11 shows a further modification in which a continuous sheet, panel &c. is joined by moulding a section 74 against the end of a preceding section 70 ; an inter-locking tenon 75 may be formed by a portion 76 of the mould and the article may be moulded about a metal core in the form of a bar &c. which is advanced successively through the mould.
Patent GB-225885-A (GB)
Title: Improved process for reducing oxygenic organic compounds or mixtures containing them
IPC: C07B31/00
Filed: 1924-12-08
Abstract: The reduction of oxygenated organic compounds or mixtures containing them is effected by passing their vapours over metalized carbon, i.e. carbon which has been impregnated with such metals as iron, nickel and chromium, maintained at a temperature between 390 DEG  C. and red heat.  Preferably, steam or an indifferent gas such as hydrogen is present.  The process is specially applicable to the reduction of the hydroxy and acid compounds present in the tars obtained from the carbonization of coal, lignite, peat, sapropel, &c.  The metalized carbon may be prepared (1) by mixing powdered charcoal with metal, or with metal oxide and then reducing the oxide, or with metal salts of organic acids and then carbonizing the salts; (2) by impregnating coal, peat, wood, sugar, &c., with solutions of metal salts, precipitating the oxides or hydroxides, and carbonizing the product, or by using colloidal solution of metal oxides or hydroxides for the impregnation and subsequently carbonizing; (3) by decomposing organic substances and depositing carbon on powdered metals such as iron. According to the example, p-cresol is distilled in a current of hydrogen and the mixture passed through an iron tube charged with metalized carbon, obtained by depositing carbon on powdered iron, and maintained at a temperature of 430 DEG  C.; the product is condensed and consists of toluene.  The Specification as open to inspection under Sect. 91 (3) (a) describes aso the use of a form of metalized carbon obtained by mixing a substrate such as asbestos, pumice, zeolite or other silicate with a metal or metal oxide or saturating it with a solution of a metallic salt or a colloidal solution of a metal oxide or hydroxide and carbonizing where necessary, by passing gaseous organic substances such as cresols over the substance at a temperature of about 500 DEG  C.  This subject-matter does not appear in the Specification as accepted.
Patent GB-1303610-A (GB)
IPC: B23K9/095
Filed: 1971-06-23
Abstract: 1303610 Stud welding control apparatus OMARK INDUSTRIES Inc 23 June 1971 [30 June 1970] 29500/71 Heading H2H Stud welding apparatus is provided with means whereby should two or more successive bad welds be made by the apparatus, further welding attempts are inhibited. Stud welding apparatus comprises a circuit 21 for providing a signal when welding current flows through the welding gun thus indicating a good weld and a circuit 22 which provides a signal each time a welding operation is initiated by the apparatus thus indicating an attempt to perform a welding operation. These signals are fed, by way of conductors 30, 31 respectively, to a binary counter 23 the output of which counter is fed to a circuit 24, the function of which circuit is to inhibit further welding operations should the signals 30, 31 appear in the wrong sequence. In operation during a welding cycle a good weld pulse will be received first in the binary counter 23 by way of the conductor 30 and this pulse will set the binary to a count of 0. Shortly thereafter in the same welding cycle the weld attempt circuit 22 will produce a pulse which is fed to the counter by the conductor 21, this pulse setting the binary to a count of 1. If in the next welding cycle a good weld occurs, another pulse appears on the conductor 30 which resets the counter to 0. If however a bad weld occurred no signal would appear on the conductor 30 and the subsequent weld attempt pulse on the conductor 31 would step the counter on a count of 10 or two. If the next weld is good the counter will be reset to zero but if it is bad, making two bad welds in succession the counter will step on to a count of 11 or three. Thus with a signal 31 appearing without a signal 30 the counter will provide an output to the bad weld protection circuit 24 which causes a transistor 33 therein to be turned on thereby short circuiting a relay 1CR. De-energization of this relay causes a lamp to light to indicate a bad weld. A second relay 2CR in the circuit 24 functions to inhibit any further welding attempts and may also stop the stud feeding mechanism and switch off the power supply to the apparatus. Means are provided to prevent the circuit 21 from resetting the counter 23 and to prevent the circuit 22 causing the counter to count when a plurality of bad welds has occured.
Patent GB-364628-A (GB)
Title: Purification of crude aromatic compounds
IPC: C07D209/84
Filed: 1930-10-02
Abstract: Crude anthracene, acenaphthene, phenanthrene and carbazole are fractionally sublimed with the vapours, preferably superheated or saturated, of liquid chlorinated hydrocarbons, both aromatic and aliphatic such as monochlorbenzene, o-dichlorbenzene, chlorinated paraffin hydrocarbons and the chlorinated residue from the chlorine purification of crude benzol fractions all of which exercise a selective solvent action on at least one of the impurities in the crude compound to be purified.  The less soluble constituents tend to volatilize whereas the more readily soluble constituents tend to remain behind, for instance phenanthrene tends to be removed from a crude anthracene containing phenanthrene and carbazole.  The molten crude aromatic compound may be sprayed into ascending vapours of the subliming solvent or permitted to flow countercurrent thereto, for example in a baffle tower.  The vapours may be superheated and recirculated after a slight cooling to remove the sublimed substance or the mixed vapours may be wholly condensed, crystallizing out the sublimed substance, and filtered, the filtrate being used again.  A carbazole solvent such as furfural or pyridine may be added to the condensed vapour to obtain a purer anthracene.  The purified anthracene may be further treated for the recovery of carbazole such as by heating with caustic alkali and distilling off the anthracene or removing it by solvents, or recrystallization from furfural or pyridine or other carbazole solvent.  The anthracene may be directly oxidized to anthraquinone using a catalyst. Phenanthrene may also be recovered.  It is also possible to mix the crude anthracene with the solvent and to heat the mixture. The process may also be used to purify acenaphthene or to separate carbazole from phenanthrene.  In examples, (1) crude anthracene is melted in a still and superheated vapours of o-dichlorbenzene are passed through the outgoing vapour being condensed and the condensate filtered.  The filtrate is then distilled to yield more anthracene and the vapours are re-used.  The residue contains phenanthrene and tarry constituents from which phenanthrene may be recovered by ordinary methods; (2) the chlorinated residue from the chlorine purification of crude benzol by the process described in Specification 290,840, [Class 2 (iii), Dyes &c.], or monochlorbenzene, may be used to replace the o-dichlorbenzene in example (1); (3) crude anthracene is treated with o-dichlorbenzene as in example (1); the cake from filtration contains anthracene, phenanthrene and carbazole, which may be catalytically oxidized to anthraquinone, the carbazole being burnt out during the process; (4) the residue from a solvent purification of crude anthracene is treated as in example (1) with o-dichlorbenzene or monochlorbenzene vapours to give a product containing carbazole which may be readily purified by normal methods.
Patent GB-1528306-A (GB)
Title: Process and arrangement for automatic determination of parallax
IPC: G02B7/30
Filed: 1977-07-14
Abstract: 1528306 Photo-electric distance determination ERNST LEITZ WETZLAR GmbH 14 July 1977 [19 Aug 1976] 29579/77 Heading H4D Parallax in a stereoscopic optical system (e.g. binocular system) with a movable optical grating structure 16 is automatically determined and/or reduced by applying the signals from photoelectric receivers 20, 21, to differentiators 32, 33, multiplying each differentiated signal by the respective other first signal to derive respective product signals in stages 34, 35, subtracting the two product signals from each other in circuit 36 and multiplying the resulting difference signal in a further stage 37 by a reference signal related to the motion of the grating structure 16 in order to produce an output signal which is applied to a parallax error indicating device 39 and/or a servodevice 25 in a parallax correcting circuit (which pivotably displaces a mirror 15). The input signals are derived via lenses 10, 11, and deflecting mirrors 12 to 15 of a base range finder. Filters eliminate signal components containing no measurement information and reduce noise components.
Patent GB-285968-A (GB)
Title: Improvements in or relating to the dyeing, printing and stencilling of materials made of or containing cellulose derivatives
Filed: 1926-11-23
Abstract: 285,968. Dreyfus, H. Nov. 23, 1926. Grant of Patent opposed. N-Oxyalkyl-derivatives of dyestuffs are obtained by interaction of a compound containing an aryl dye nucleus having an amino or imino group either in the nucleus or as a substituent (other than an azo dye) and a halogenhydrin such as ethylene chlorhydrin, propylene chlorhydrins glyceryl chlorhydrins, glyceryl dichlorhydrins, epichlorhydrin, chlorbutyleneglycol, erythrol dichlorhydrin, or mannitol mono- or di-chlorhydrin, or an alkylene oxide such as ethylene- or propylene-oxide, or a carbohydrate such as glucose, lactose, or galactose, or other aliphatic hydroxylaldehydes or ketones, or an aliphatic hydroxy carboxylic acid; alternatively an aryl dye nucleus containing a phenolic group or a halogen may be condensed with an aminoalcohol, or the dyestuffs may be synthesized from components containing the substituted amino or imino group. Examples indicate how the following dyestuffs may be obtained :-(1) 1-amino-4-(#-oxyethylamino)-anthraquinone from 1-oxy-4-aminoanthraquinone and #-aminoethylalcohol ; (2) 1-#-oxyethylaminoanthraquinone from 1-chloranthraquinone and #-aminoethylalcohol ; (3) 1 : 4-di-(#- oxyethylamino)-anthraquinone from 1 : 4-diamino- .anthraquinone and ethylene oxide; (4) a product from 1-amino-4-methoxyanthraquinone and propylene oxide; (5) a product from 3 : 3<1>-dichlorindanthrone (Indanthrene blue GCD) and gammaamino and #-dioxypropane ; (6) a product from .dibrombenzanthrone and #-aminoethylalcohol ; (7) a product from anthrapyrimidone and ethylene chlorhydrin; (8) an NN<1>-di-(oxyethyl)-indigo by condensing oxyethylaniline-o-carboxylic acid with chloracetic acid and alkali fusion of the resulting N-oxyethylphenylglycine-o-carboxylic acid; (9) 5 : 5<1>-di-(#-oxyethylamino)-indigo from dibromindigo and aminoethylalcohol; (10) a product from diaminodimethylacridine hydrochloride and galactose; (11) diethylamino-oxyethylamino-naphthophenazoxonium chloride from nitrosodiethyl-maminophenol and oxyethyl-1-naphthylamine. Aminoanthraquinones or their substitution products may also be condensed with chlorhydrins; two or more molecules of aminoanthraquinones may be condensed with one molecule of a chlorhydrin containing two or more chlorine atoms such as glyceryl-alpha- or #-dichlorhydrin ; the hydroxy-containing side chain may be introduced into two or more amino groups in the same anthraquinone nucleus or twice into the same amino group; further, aminoanthraquinones may be replaced by hydrazino anthraquinones; thus 1- hydrazino anthraquinone may be condensed with #-ketopropyl alcohol, or glycollic aldehyde. Mannitol monochlorhydrin is obtained, together with some dichlorhydrin by treating mannitol with hydrochloric acid at 80‹ C.
Patent GB-400771-A (GB)
Title: Improvements relating to blackboards and the like
IPC: A47B97/02
Filed: 1932-10-22
Abstract: 400,771. Blackboards. FINDLAY & SONS, Ltd., W. and FINDLAY, R. P., 69, Side, Newcastle-on-Tyne. Oct. 22, 1932, No. 29597. [Class 146 (ii).] Cylinders carrying lengths of flexible material adapted to receive writing or drawing and to be traversed over the surface of a blackboard or other flat surface are interchangeably mounted in fittings each comprising a pair of hook-shaped rocking arms freely pivoted on pins carried by brackets attached to the face of the board, the arms being adapted to receive the ends of a spindle on to which the cylinder is slipped. The material b to be written or drawn upon winds over the surface of the board a between cylinders c mounted on spindles d, the ends of which are received by pairs of hook-shaped rocking arms e freely pivoted on pins f carried by brackets g attached to the board. The spindles are provided with handwheels h and have collars k, j for retaining the cylinders thereon, the collar k being removable. The spindle d is connected to its cylinder c by a key on the spindle engaging a recess in the cylinder ; alternatively, the centre portion of the spindle and the cylinder hole may be square in cross section, or the two may be connected by screw threads, by a disc near one end of the spindle having projections which engage recesses in the end of the cylinder, or by a spring on the spindle which engages frictionally in the cylinder &c. The cylinders may be mounted with their axes vertical or horizontal, so that the material b receives either a horizontal or a vertical traverse. Preferably, springs s are provided to bear on the roller spindles to prevent unintentional unwinding, but in the form shown in the Figure, the lower arms e are formed with removable pins t to lock the spindle in its bearings. The material b is attached to the cylinders by slipping its end either under a wire running lengthwise of the cylinder or into a central slot in the cylinder, and preferably consists of paper coated with black distemper and lined or squared to facilitate writing or drawing.
Patent GB-340329-A (GB)
Title: Improvements in or relating to sleeve valve internal combustion engines
IPC: F01L5/08
Filed: 1929-10-01
Abstract: 340,329. Balancing reciprocating machines. DAIMLER CO., Ltd. and BUSH, A. E., Daimler Works, Coventry. Oct. 1, 1929, No. 29642. [Class 122 (iii).] In a sleeve valve internal - combustion engine in which the valve sleeves 8 are operated by a cam shaft 4 rotating at half the speed of the crank shaft 1, the sleeve valve couple is balanced by a reciprocating balance weight or weights actuated by the cam shaft. The valve sleeves 8, 9 are operated by cams 11, 12 through links 13, 14 actuated by the cam shaft 4. This shaft is provided with a crank pin 17 which actuates a reciprocating balance weight 19 mounted to slide in a casing 20, having an oiling and inspection aperture closed by a plug 24. The balance weight is loaded at 22, and its surrounding casing acts as a dashpot or buffer. Balance weights are mounted on each end of the cam shaft. In a modified construction a rotary balance weight 26 carried by the shaft 4 supplements the action of the reciprocating balance weights.
Patent GB-677700-A (GB)
Title: Process and apparatus for the cleansing of the gases used in chemical cleaning of textiles and the like
IPC: B01D47/06
Filed: 1950-12-04
Abstract: 677,700. Washing gases. DECKER, R., and HOLZ, H. Dec. 4, 1950 [June 24, 1950], No. 29676/50. Class 55 (ii). Gases used for drying textiles &c. which have been cleaned with organic solvents are brought into contact with finely-divided liquid to remove dust, fibres, &c. from the gas stream. A washer through which the gas passes from an inlet 2 to an outlet 3 has spray nozzles 4 forming a liquid screen reaching to the walls. Liquid collecting on the inclined bottom is discharged to a liquid seal 5.
Patent GB-821615-A (GB)
Title: Improvements in or relating to methods of manufacturing luminescent screens
IPC: H01J9/227
Filed: 1955-10-18
Abstract: 821,615. Luminescent screens. ZENITH RADIO CORPORATION. Oct. 18, 1955 [Oct. 19, 1954], No. 29693/55. Class 39(1). Methods of depositing luminescent powder upon predetermined areas of the viewing screen of a C.R.T. follow one of the sequential procedures shown in Figs. 1, 2 and 3. The luminescent powder is settled through a column of liquid which consists of water or in which water is a principal ingredient, e.g. a dilute aqueous silicate solution and an electrolyte, such as potassium silicate and barium nitrate. The settling liquid can be applied in two stages-without or with the powder. The photosensitive resist can be initially watersoluble but becoming relatively insoluble upon exposure to light, and only the portion of the resist corresponding to the pre-determined areas being exposed. Examples of such resists are sensitized gum arabic, albumen, photographic gelatin and polyvinyl alcohol. Specifically an aqueous solution of polyvinyl alcohol and a sensitizing agent such as ammonium dichromate can be applied to the screen which is rotated. Alternatively resists which are initially insoluble in water but which become soluble on exposure to light, such as a bichromated colloid containing a colloidal dispersion of water-insoluble acrylate resin can be used. The methods can be used for manufacturing a screen for a colour-television C.R.T. by depositing different luminescent powder upon each of a plurality of groups of pre-determined areas of the screen. The screen can be provided with an aluminium layer via a nitrocellulose film in the usual way.