baber/WOPTO huggingface dataset:
Patent GB-1380505-A (GB)
Title: Peak detector circuit
IPC: G01R19/04
Filed: 1972-03-21
Abstract: 1380505 Detecting signal peaks RCA CORPORATION 21 March 1972 [29 March 1971] 13076/72 Heading H3T A circuit for detecting the peak of a signal comprises two transistors Q 1 , Q 2  having a common source impedance 13, a D.C. path from a signal input terminal to the gate of Q 2  and a path from the terminal to the gate of Q 1  which provides a voltage representative of the signal peak value whereby current in Q 2  follows the input-signal until Q 2  is cut-off. As described, the values of resistors 13 and 15 are so chosen that the source voltage of Q 2  does not follow its gate voltage and the current in Q 2  therefore follows the input signal until the gate voltage of Q 2  rises above the peak representing voltage stored on capacitor 20. This is below the peak signal level by the small voltage drop in a lightly conducting diode 11 so that Q 2  cuts off near the signal peak and provides an output via Q 3 . In Fig. 1 (not shown) transistor Q 1  has its gate and drain shorted together.
Patent GB-550514-A (GB)
Title: Improvements in closure devices for jars, containers, pipes and the like
IPC: B65D45/24
Filed: 1941-10-10
Abstract: 550,514. Pipe stoppers. BARRINGTON, R, R. Oct. 10, 1941, No. 13085. [Class 99 (ii)] [Also in Group XVII] A closure device for jars applicable to stopping the end of a pipe comprises a number of elongated strips pivoted intermediate the length of their inwardly directed legs 3 to an endless frame 2, the legs 3a of the strips extending downwards outside the frame and terminating in claws 5 for engaging a flange 7, and the inward extremities 3b of the legs 3 inside the frame pressing jointly on a small area of the cover 6 located centrally underneath the frame. As shown the frame 2 is substantially triangular in shape with truncated corners at each of which one of the strips is pivoted, and one of the strips may have a lever 8 pivoted to its downwardly directed end for engaging under the flange 7 and assisting the locking of the closure device in position. In the case of a pipe having no flange a wire or band may be bound tightly around the pipe near the end to be covered for engagement by the claws and lever.
Patent GB-288841-A (GB)
Title: Improvements in or relating to cloth piece-goods drums or boards
IPC: B65H75/06
Filed: 1927-05-17
Abstract: 288,841. Tod, J. E. May 17, 1927. Piece boards.-A piece board is made so that it may be used as a showeard and as a receptacle for patterns, &c. The board comprises a wooden framework a, Fig. 5, to the back and front of which are attached panels e, d of cardboard. The back panel is secured along one part only so that the other part may be turned outwardly, as shown, to form a lid to the receptacle comprising the rest of piece board, or as a strut e<1> for enabling the used piece board to be used as a showeard , as shown in Fig., 2. The board may be enveloped in a tube of millboard so that it may be withdrawn without disturbing the roll.
Patent GB-1089505-A (GB)
Title: Measuring systems
Inventor: HOLMES ROBERT THOMPSON
IPC: G01B7/12
Filed: 1966-03-25
Abstract: 1,089,505. Selective signalling. ROLLSROYCE Ltd. March 25, 1966, No. 13204/66. Heading G4H. - To measure the circumference of a cylinder 18, the cylinder is frictionally driven 12 about its supports 20 and photo-electrically produced pulses from a wheel 16 resiliently pressed 34, 36 against the outside of the cylinder are counted 30 for the duration of one revolution 28 of the cylinder, this being determined by detecting 24 the passage of a projection 26 on the cylinder through a datum position.
Patent GB-329485-A (GB)
Title: Improvements in spindle supports for winding and twisting machines
IPC: D01H7/10
Filed: 1929-04-29
Abstract: 329,485. Hamel Alct.-Ges., C. Feb. 6, 1929, [Convention date]. Spindle apparatus.-The spindles of twisting and winding machines are supported in the rail 9 by means of spring washers 1 provided with radial offset tongues 2, 3 so that oscillation is permitted about a point midway of the bearing. The tongues are of two different lengths, the longer being offset to bear against the rail.
Patent GB-132268-A (GB)
IPC: B02B1/04
Abstract: 132,268. Kruger, J. J., and Borum, C. Aug. 31, 1916, [Convention date]. Stationary-vessel washing-apparatus.-In order to remove fungi from grain in bags, water is forced through the filled bag while the bag is so arranged that it completely closes the passage through which the water has to pass. The bag d is placed against a cavity e of corresponding shape, such cavity being formed in the wall e' of an enlargement b in a water passage a, c, Fig. 1, or in the bottom of a tank, Fig. 5, into which the water is admitted from above or below; and such a tank may be provided with an overflow pipe f arranged to limit the amount of water passing through the bag.
Patent GB-317111-A (GB)
Title: Improved method of and means for removing combustion residues from internal combustion engines
IPC: F02B1/00
Filed: 1928-05-05
Abstract: 317,111. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). May 5, 1928. Powdered - fuel engines. - To remove combustion residues, an annular space 8, formed between a stepped piston and a stepped cylinder, is maintained continuously at a higher pressure than that in the combustion chamber 7, with which it is always in communication by an annular gap A. To effect this during the compression stroke, the compression ratio of the space 8 is greater than that of the chamber 7 and in the twostroke - cycle engine shown in Fig. 1, compressed air or other scavenging medium enters in a tangential direction through ports 3 and through valve-controlled ports 14, 14, 22, an exhaust valve 9 being provided in the cylinder head. Shortly before, or simultaneously with, the admission of fuel through a valve 10, higher pressure scavenging medium is admitted through a valve 12 to maintain the excess pressure in the space 8 during the expansion stroke; this scavenging medium may be compressed in an annular space 17 formed by a second step on the piston; alternately, a liquid or a gaseous fuel may be admitted by the valve 12 and ignited. The port 3 may be arranged between the first two piston rings and be valve-controlled, and the scavenging medium may be mixed with a lubricant. The application to a four-stroke-cycle ,engine is also described.
Patent GB-374225-A (GB)
Title: Improvements in cardboard boxes for containing fruit or other perishable goods
IPC: B65D5/28
Filed: 1931-05-06
Abstract: 374,225. Paper-fasteners. JOHNSTON, J., 91, Fordneuk Street, Glasgow. May 6, 1931, No. 13352. [Class 44.] A metal fastener 12 is adapted to clip over the top edge of a cardboard box, points 17 penetrating the material, and a tongue 13 passing through a hole in the lid and being thereafter bent over.
Patent GB-353538-A (GB)
Title: Process for the manufacture of water insoluble azo dyestuffs
IPC: C09B29/00
Filed: 1930-04-30
Abstract: Azo dyes; azo dyes, forming on the material.-Azo dyes are made in substance or on a substratum by coupling a diazo compound of an aromatic or heterocyclic non-sulphonated amine or derivative thereof or an aromatic aminoazo compound or diamine with an arylide of a hydroxyphenanthrene-o-carboxylic acid.  In an example, cotton padded with 2-hydroxyphenanthrene-3-carboxylic acid-o-toluidide is developed with diazotized 2 : 5-dichloraniline (yellowish red).  Other arylides specified are 3-hydroxyphenanthrene-2-carboxylic acid-o-toluidide and p-anisidide and other diazo components: o- and p-nitraniline, 5-nitro-o-anisidine, 5-chloro-2-toluidine, m-aminoazotoluene, 2-amino-5-benzoylaminohydroquinone diethylether, dianisidine, 1-, 2- or 3-aminocarbazole, 9-ethyl-3-aminocarbazole, 2-aminodiphenyleneoxide, p-nitro-o-toluidine, p-chlor-o-nitraniline, m-nitro-p-toluidine, 4-nitro-2 : 5-dimethoxy-41-aminoazobenzene. Arylides of hydroxyphenanthrene carboxylic acids and made from the corresponding acid and amine by boiling in an inert organic solvent in presence of a condensing agent, e.g. phosphorus oxychloride.
Patent GB-1333536-A (GB)
Title: Locking device for drawers suitable for rack mounted electrical  installations
IPC: H05K7/14
Filed: 1972-03-22
Abstract: 1333536 Locking devices COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL 22 March 1972 [22 March 1971] 13367/72 Heading E2A In a locking device for a drawer housing and providing connections to electrical equipment a retractible cam 16 is engageable with respective sides of a stop 21 fast with a front panel 20 of a rack. The-drawer is stopped by the cam engaging the stop before the drawer is fully closed, the cam then being retracted by turning in one direction f 1 , a button 14 which is then pushed inwardly and rotated in the opposite direction so that the cam engages behind the stop. By completely turning down the button the reaction of the cam against the stop pusher the drawer pins 24, Fig. 1 (not shown) of the electric equipment into a socket 25. An angle bracket 31, Fig. 6 (not shown) is fixed to the drawer whereby the cam abuts a wing thereof to ensure that the cam turning movement is restricted to 90‹.
Patent GB-901605-A (GB)
Title: Improvements relating to the production of linear aromatic polyesters
Inventor: CONIX ANDRE JAN
IPC: C08G63/19
Filed: 1957-04-26
Abstract: Polyesters, suitable for the manufacture of fibres and photographic film-bases, are made by reacting (a) an aqueous solution of a metal phenolate of a bis-phenol with (b) a di-acid halide of one or more of terephthalic, isophthalic and fumaric acids dissolved in a water-immiscible organic liquid which is a solvent for the polyesters formed by the reaction.  The bis-phenol (a) may be partly replaced by another dihydric phenol, e.g. hydroquinone or resorcinol and the acids (b) may be partly replaced by a dicarboxylic acid having two phenylene rings as described in the parent Specification.  The bis-phenol used may have the formula HO-Ar-R-Ar-OH wherein each Ar represents a para- or meta-phenylene radical or a methyl-substituted phenylene radical and R represents a direct link, an alkyl- or aryl-substituted methylene group, an alkyl- and aryl-substituted methylene group, a halogen-substituted methylene group, a halomethyl substituted methylene group, a sulphone group, a carbonyl group or a carbon atom forming part of a cycloaliphatic ring. Polyesterification is preferably effected in the presence of a quaternary ammonium compound as catalyst.  The polyesters are soluble in organic solvents such as methylene chloride, chloroform, 1:2-dichloroethane, tetrachloroethane, methylchloroform, 1:1:2-trichloroethane, benzene, toluene, dioxane and tetrahydrofurane.  Those of fumaric acid may be made insoluble by heating them at above 200 DEG C. or by effecting condensation in the presence of a vinyl compound.  In examples, polyesters were obtained by reacting in a medium containing aqueous sodium hydroxide solution together with dioxane or methylene chloride and/or 1:1:2-trichloroethane (1)-(3) fumaroyl chloride with 1,1-(4,41-dihydroxy-diphenyl) propane, 2,2-(4,41-dihydroxy-diphenyl) butane or 1,1-(4,41-dihy droxy-diphenyl) cyclohexane; (4)-(7) isophthaloyl chloride and 2,2-(4,41-dihydroxy-diphenyl) butane, 1,1-(p,p1-dihydroxy-diphenyl)-1,1-(diphenyl) methane, 1,1-(p,p1-dihydroxy-diphenyl)-1-phenyl ethane or 2,2-(4,41-dihydroxy-diphenyl) propane; (8) isophthaloyl chloride, terephthaloyl chloride and 2,2-(4 41-dihydroxy-diphenyl) propane; (9)-(13) terephthaloyl chloride and 2,2-(4,41-dihydroxy-3,31-dimethyl-diphenyl) propane, 3,3-(4,41-dihydroxy-diphenyl) pentane, 4,41-dihydroxy-diphenyl methylphenyl methane, 1,1,1 - trichloro - 2,2 - (4,41 - dihydroxy - diphenyl) ethane or 2,2-(4,41-dihydroxy-diphenyl) propane.  The polyesters may be recovered from the organic solutions thus obtained by pouring the solutions into ethanol or hot water.  Specifications 578,079, 621,102, 724,759, 781,185 and U.S.A. Specification 2,035,578 also are referred to.
Patent GB-459777-A (GB)
Title: Improvements in or relating to the extrusion of moist, plastic bodies
IPC: F04B39/12
Filed: 1935-05-07
Abstract: 459,777. Electric endosmose. BIRD MACHINE CO., Neponset Street, South Walpole, Massachusetts, U.S.A. May 7, 1935, No. 13463. Convention date, Nov. 28, 1934. [Class 41] [See also Group V] Moist plastic masses are extruded in the form of elongated bodies of small cross-section through a perforated die-plate, an electronegative charge being impressed on the plate and a positive charge on another part of the machine contacting with the mass, thereby attracting moisture to the faces of the perforations in the die-plate and thus lubricating them, the part of machine having a positive charge being kept free from the mass which tends to become deposited thereon. The moist clay &c. mass is delivered to a hopper 11 and is forced by a worm 16 through a spider 9 to the die-plate 21 which is insulated from the conical mouth piece 19 by a gasket 24 and is retained by insulated bolts 22. The plate is connected to the negative pole of a direct current generator 28, the positive pole of which is connected to a tubular electrode 26 which is insulated from the casing 13 by material 27 and is kept free from adhering clay by the worm 16. The conical part 19 may be lined with rubber insulation. Specifications 444,582 and 456,353, [Group II], are referred to.
Patent GB-239904-A (GB)
Title: A method and apparatus for projecting advertising and other signs into space
IPC: G09F19/18
Filed: 1924-06-02
Abstract: 239,904. Sieber, J. June 2, 1924. Optical-projection apparatus.-Images are projected on to a light beam by means of an optical projection apparatus containing one or more slides and having means for splitting the projection beam to form a number of beams which converge to form the image. As shown in Figs. 1 and 2, the beam of a kinematograph projector 2 is divided by any suitable means 4, after passing through the film, to form two beams c<1> which are reflected by adjustable mirrors 5 so as to converge and form an image at a point b on the beam a of a searchlight projector 1. In a modification, Fig. 3, a single source of light is used, a centrally apertured lens or prism 9 being provided which allows light to pass directly to lenses 11 to form a beam a. The light passing through the prisms 9, c<1> passes through one or more pairs of lenses 13 to form image-carrying beams each of which is reflected by one or more mirrors 14 on to the beam a, adjacent images on a kinematograph film 15 or corresponding slides may be arranged in the beams c<1>. A multicoloured screen may be arranged in the beam a or in the projector beam, the other beams being white or of light colour. The lenses may be cooled; Fig. 4 shows lenses cooled by liquid 16, which may be coloured.
Patent GB-216900-A (GB)
Title: Improvements in and relating to electric arc lamps
IPC: H01J61/98
Filed: 1924-06-02
Abstract: 216,900. British Thomson-Houston Co., Ltd., (Assignees of Devers, P. K.). June 1, 1923, [Convention date]. Arc lamps; electrodes; lowpressure metallic-vapour apparatus.-In an enclosed arc lamp containing a gas or vapour having a substantial pressure at the operating temperature, a body 10 of a refractory substance emitting radiation at the red end of the spectrum when heated is arranged between electrodes 2, 3 preferably of tungsten. The filling may consist of argon, neon, nitrogen or other inert gas or a mixture thereof at a pressure of a third of an atmosphere, together with mercury vapour supplied from a pool of mercury 7 into which dips a looped wire 8 adapted to be heated to incandescence to start the arc. The mercury may be replaced by alkali metal amalgam or other vaporizable material. The electrodes may be 0.125 inch in diameter and 0.09 inch long. The body 10 is about the same size and may be of zirconium oxide, carbide. or silicate or thorium oxide, with gaps of # inch between the body 10 and the electrodes, the lamp takes 40 ampÞres with a total potential drop of 25 volts, these values being the same as for a single arc of ¢ inch length. The colour of the complete radiation is determined by the size of the intermediate body and' the lengths of the arcs. The body 10 is supported by a tungsten stem 11 anchored in an insulator- 12, carried by the electrode supports 4, 5.
Patent GB-163308-A (GB)
Title: Improved apparatus for protecting electric supply circuits comprising aerial lines
IPC: H02H3/24
Filed: 1921-05-12
Abstract: 163,308. Akt.-Ges. Brown, Boveri, et Cie. May 15, 1920, [Convention date]. Protective arrangements for electric supply circuits. Apparatus is provided for preventing the action of the automatic switching-in device of the maximum current switch of a feed line in the case of a pendulating or intermittent short circuit. A relay in parallel with the maximum current switch controls a time relay permitting the closure of the maximum current switch only after the expiration of a certain period of time following re-establishment of normal circuit conditions. In switching in the feed line a with busbars b alive, a time relay m is energized closing contacts n completing the closing circuit of the maximum current switch c with automatic closing device e. If a short-circuit is present on the line d, the relay g is energized, breaking at contacts f the circuit of the time-relay m, thereby preventing closure of the switch c. On cessation of the short-circuit, the relay m is again energized, and, after a period of time determined by the setting of the time-element mechanism o, the contacts n are bridged and the main switch c is automatically closed. If the short-circuit recurs before this action is completed, the relay g is again energized and the core of the relay m drops to its initial position.
Patent GB-353110-A (GB)
Title: Improvements in or relating to advertising or display devices
IPC: G09F7/12
Filed: 1931-02-02
Abstract: 353,110. Interchangeable unit signs. HAAS, P. DE, 63, Highfield Road, Rock Ferry, Cheshire. Feb. 2, 1931, No. 13565/30. [Class 3 (ii).] In interchangeable letter signs of the type in which cut-out characters f are backed with velvet g and are mounted on a sheet of velvet d by the interlocking of the pile surfaces, the velvet bed d is anchored to the base b at the edges only in order to minimize the possibility of the characters becoming detached by vibration. The board b may be backed by a sheet of stiff paper e, or else by another sheet of velvet to form a double-sided sign. The whole may be mounted in a frame c, a glass front also being provided if required. The device may be made in the form of a cash tray comprising a metal base formed with a curved lip for receiving money and carrying the velvet, a detachable glass top being provided on which the money is placed.
Patent GB-1390938-A (GB)
Title: Analysis of fields containing optically distinguishable  features
IPC: G06K11/00
Filed: 1971-05-06
Abstract: 1390938 Digital analysis of signals IMAGE ANALYSING COMPUTERS Ltd 3 May 1972 [6 May 1971 (2)] 13588/71 Heading G4H [Also in Division G1] In measuring oxide (black) and sulphide (grey) inclusions in rolled steel (white), the amplitude excursions of a video signal of a specimen are detected against two reference levels V1, V2 corresponding to grey and black respectively to form two detected signals at B and C each comprising pulses of constant amplitude and durations equal to the durations of said excursions, and errors arising from the finite resolution of the scanning spot, noise, or non-instantaneous changes in the video signal are automatically corrected by delaying the detected signals at 22 and 24 for at least two successive time intervals, comparing the values of the signals so produced, and if the comparison detects a pattern of signal values indicating that one is incorrect correcting it to produce corrected NOT WHITE and BLACK signals at X and Y. A GREY signal is obtained at D by inverter 26 and AND gate 28. The detected signals are sampled at regular intervals to derive a series of picture points at the corners of squares or 1 Î 2 rectangles. The delays are equivalent to a whole number of points in a horizontal, vertical or diagonal direction. Correcting grey fringe to black object.-Circuits are described with reference to Figs. 4 to 7 (not shown), for comparing signals at B, C, X, Y and at points between the two delays to detect the sequence BLACK, NOT WHITE, WHITE or WHITE, NOT BLACK, BLACK in horizontal, vertical, diagonal and horizontally expanded vertical directions and changing the intermediate NOT WHITE or NOT BLACK to BLACK or WHITE respectively. An alternative circuit which detects and eliminates one or more GREY spots in a NOT GREY background is described with reference to Fig. 8 (not shown). Correcting small black feature misidentified as grey.-In rolled steel, the grey sulphide inclusions are generally long and thin and parallel to the rolling direction. If the line scan is arranged perpendicular to the length of these inclusions, any grey feature should be detected over several line scans, and a short feature should be corrected to BLACK. A circuit is described with reference to Fig. 10 (not shown), connected to receive inputs from D and Y (Fig. 2), which detects when either or both inner points of 1, 2, 3 or 4 consecutive vertical columns of 4 points sandwiched between adjacent vertical columns of 4 WHITE points are GREY and corrects them to BLACK. A similar circuit, Fig. 12 (not shown), can be used to correct a GREY fringe to a long thin black feature. Correcting noise.-A single spot of one colour in a background of a different colour is assumed to be due to noise and is detected either by using a circuit similar to the one described with reference to Fig. 10, or by comparing 3, 5 and 3 points in consecutive lines to detect whether the centre point is different from the other 10 points, Figs. 14 and 15 (not shown).
Patent GB-149651-A (GB)
Title: Lifting jack for compressed air
IPC: B66F3/24
Filed: 1920-05-18
Abstract: 149,651. Michel, A. Aug. 5, 1919, [Convention date]. Void [Published under Sect. 91 of the Act]. Jacks.-The piston-rod 4 of a jack actuated by compressed air is made with grooves 11 which are engaged automatically by a catch 12 pivotally mounted in the cylinder head. The crutch 1 is pivotally mounted on the boss 2 of a shaft 3 which is screwed into the rod 4.
Patent GB-838514-A (GB)
Title: Improvements in and relating to soft solder
IPC: B23K35/26
Filed: 1956-05-03
Abstract: A soft solder for use with tools having copper bits is formed of an alloy of Pb and Sn containing 50-65% Sn with less than 0.5% Sb and contains an amount of Cu equal to 1% by weight of the Sn content of the alloy, the alloy being substantially free from any other impurities which tend to increase the solubility of Cu in the solder, e.g. Bi, Cd, Zn, Hg.