baber/WOPTO huggingface dataset:
Patent GB-666736-A (GB)
Title: Improvements relating to electric motor control systems
IPC: H02P7/282
Filed: 1949-08-12
Abstract: 666,736. Bridge circuits. CROMPTON PARKINSON, Ltd., and STRONG, D. J. Aug. 14, 1950 [Aug. 12, 1949], No. 21067/49. Class 37. [Also in Group XXXV] In a system for maintaining the speed of a motor constant, the motor M drives an alternator A which feeds a frequency bridge 1 ... 9, the output of which is supplied via push-pull double triode DT and push-pull pentodes P1, P2 and a phase-discriminator DR to an amplifier DA-which controls the motor field F or an additional field f of an auxiliary exciter E. The frequency bridge is set for balance at a predetermined speed by rheostats 9, and the discriminator DR provides a continuous control characteristic with only one stable point so that within a narrow speed ranges below and above the balance point the output current of amplifier rises from cut-off to a maximum value and outside this range amplifier DA is cut off for " low " speeds and supplies its maximum output for " high '' speeds, Fig. 3 (not shown). The filter LC removes harmonics derived from the alternator A. Variation of phase shift on the grids and anodes of the discriminator DR due to presence of filter LC may be avoided by providing a phase-shifting network instead of filter LC, and supplying the bridge and discriminator DR with A.C. from which the harmonics are removed alternatively the anodes of the discriminator may be fed through a network which has a " shift " identical with that of filter LC. The speed of an A.C. motor may be regulated similarly by saturable reactors controlled by the output of the discriminator.
Patent GB-838300-A (GB)
Title: Process for the manufacture of grinding materials
IPC: B24D3/32
Filed: 1956-07-06
Abstract: Grinding materials comprising abrasive powders bonded with hardened natural or synthetic resins or rubbers are prepared by a process wherein water is foamed by agitating it with an organic surface-active agent to provide a stable foamed mass in which every bubble is independent and contains mainly air, said foam is combined with said bonding-agent and with the abrasive powder, the mass being agitated to distribute the abrasive powder and bonding agent evenly and finely among and between the bubbles, the grains of the abrasive powder being of such size that they do not separate under gravity and the bubbles being resistant to such agitation, and the stable foam is dried and hardened to bond the abrasive powder.  The bonding agent may be polyvinyl alcohol, which may be hardened by acetalization with formalin in the presence of hydrochloric acid, natural rubber, which may be hardened by vulcanization, and urea resins, which may be hardened by ammonium chloride.  Other resins, e.g. phenolic (e.g. phenol-formaldehyde) and urea resins, methyl cellulose and natural rubber, may be incorporated in or applied to the foams to regulate the hardness and resiliency.  Specified surfaceactive agents are egg albumen, isinglass and saponin.  Specified abrasives are diamond powder, silicon carbide, aluminium oxide and synthetic precious stone powders.  The materials may be applied, e.g. by coating or with adhesives, to paper, cloth and leather, which may be in the form of endless belts.ALSO:Grinding materials comprising abrasive powders bonded with hardened natural or synthetic resins or rubbers are prepared by a process wherein water is foamed by agitating it with an organic surface active agent to provide a stable foamed mass in which every bubble is independent and contains mainly air, said foam is combined with said bonding agent and with the abrasive powder, the mass being agitated to distribute the abrasive powder and bonding agent evenly and finely among and between the bubbles, the grains of abrasive powder being of such size that they do not separate under gravity and the bubbles being resistant to such agitation, and the stable foam is dried and hardened to bond the abrasive powder.  The bonding agent may be polyvinyl alcohol, which may be hardened by acetalisation with formalin in the presence of hydrochloric acid, natural rubber, which may be hardened by vulcanisation, and urea resins.  Other resins, e.g. phenolic and urea resins, methyl cellulose and natural rubber, may be incorporated in or applied to the foams to regulate the hardness and resiliency, Specified surface active agents are egg albumen, isinglass and saponin.  Specified abrasives are diamond powder, silicon carbide, aluminium oxide and synthetic precious stone powders.  The materials may be applied, e.g. by coating or with adhesives, to paper, cloth and leather, which may be in the form of endless belts.
Patent GB-300303-A (GB)
Title: Improvements relating to the preparation of paper and other similar surfaces
IPC: B41M5/124
Filed: 1927-08-10
Abstract: 300,303. Mitchell, H. C. Aug. 10, 1927. Coated paper; paper for writing upon with hard substances.-Paper which is particularly suited for the production by hand of shop window or price tickets, but is applicable also for other purposes comprises a paper base on which is applied a coating or deposit of such a nature that it may be removed with a clean fracture by a dry writing pen, pencil, or style. A paper waxed or paraffined on one side may be used as a base and to the waxed surface a coloured coating of shellac dissolved in methylated spirit and containing any colour or dye soluble in the methylated spirit. The operation of writing removes the coloured shellac layer and exposes a design of white waxed paper. The writing &c. may be fixed by warming in front of a fire. The colour or dye may be in the paper itself. Other surfaces such as cardboard may be used.
Patent GB-1206369-A (GB)
Title: An improved wave analyser
Inventor: CHANDOS ROBERT E
IPC: G01R23/00
Filed: 1968-05-03
Abstract: 1,206,369. Frequency analysis. ELECTROOPTICAL INDUSTRIES Inc. May 3, 1968, No.21163/68. Heading G1U. A wave analyzer for analyzing the frequency components present in an input signal in a given range incorporates a number of similar low pass filters 16, synchronous switching arrangements 14, 18 for applying the input to and extracting a signal from the filters in cyclic sequence and a variable frequency generator 28 which controls the switching arrangement to switch at a switching frequency from one filter to the next related to the test frequency under investigation multiplied by the number of low pass filters. The output from the filters passes to a digitalvoltmeter 34 which indicates the amplitude of a frequency component in the input signal corresponding to the generator frequency. The frequency of the generator 28 is varied to vary the test frequency over the given range. The parallel filters have the same cut-off frequency. By adjusting this frequency from control 22 the bandwidth of each frequency component selected by the system may be varied. The signals derived from the filters pass through a broad filter 32 whose centre frequency is set by the variable frequency generator 28. The system may include an automatic frequency control circuit 36 which operates so that when an output is detected by the voltmeter 34, the generator 28 is slightly adjusted to provide the centre frequency for the filter 32 which maximizes the output. The generator controls the synchronous switches via a ring counter Fig.3 (not shown).
Patent GB-916932-A (GB)
Title: Process for the production of pure solutions of callicrein inactivator
IPC: C07K14/81
Filed: 1961-06-12
Abstract: A modification of the process for producing pure solutions of callicrein inactivator according to the parent Specification is characterized in that for the extraction of the callicrein inactivator from animal organs there are used aqueous solutions of salts of metals other than alkaline earth metals or alkali metals. Specified salts are copper chloride, copper bromide, copper sulphate, copper acetate, copper nitrate, zinc sulphate, zinc acetate, aluminium chloride, aluminium sulphate, alums, lead nitrate, lead acetate, manganese sulphate, manganese chloride, ferric chloride or ferrous sulphate.
Patent GB-987407-A (GB)
Title: Water-insoluble metalliferous azo-dyestuffs and a process for their manufacture
IPC: C09B29/20
Filed: 1961-06-12
Abstract: The invention comprises a complex metal compound of a water-insoluble azo-dyestuff of the general formula <FORM:0987407/C4-C5/1> wherein R represents an alkyl, aryl, cycloalkyl or aralkyl radical which may be substituted, R1 represents the radical of an arylamide of an aromatic or heterocyclic hydroxy carboxylic acid in which the hydroxyl and the carboxylic acid group are linked to adjacent carbon atoms, n stands for the integer 1 or 2 and the benzene nucleus a may be substituted by groups which do not impart solubility in water.  The dyes are prepared by conventional diazolization, coupling and metallization procedures. In one example the diazonium chloride from 1-amino-2-methyl-mercaptobenzene is coupled with 2(21:31-hydroxynaphthoylamino) -naphthalene and the product is reacted with nickel chloride.  Other coupling components listed include arylamides of 2-hydroxyanthracene-3-carboxylic acid, 3-hydroxydiphenylene oxide-2-carboxylic acid, 2-hydroxycarbazole-3-carboxylic acid and 51-hydroxy1,2,11,21 - benzocarbazole - 4 - carboxylic acid. Additional metals specified include copper, cobalt, manganese or iron which may be used as organic or inorganic salts or complexes. Many additional examples are furnished including processes in which dyes are produced in the fibre (see Division D1).ALSO:Textile fibrous materials are dyed by a process wherein 1 or 2 mols of the diazonium compound of an amine of the general formula <FORM:0987407/D1-D2/1> in which R represents an alkyl, aryl, cycloalkyl or aralkyl radical which may be substituted and the benzene nucleus a may be substituted by groups which do not impart solubility in water are coupled on the fibre with 1 mol of an arylamide of an aromatic or heterocyclic hydroxy-carboxylic acid in which the hydroxyl and the carboxylic acid group are linked to adjacent carbon atoms free from groups imparting solubility in water and the dye produced is treated with an agent yielding metal.  In examples: Cotton yarn is impregnated in a bath containing 2-(21, 31-hydroxy-naphthoylamino)-naphthalene and developed in a bath containing diazotised 1-amino-2-methylmercapto-5-methyl benzene and nickel sulphate (1); in a similar process the coupling component is 1-(21, 31-hydroxynaphthoylamino)-2:5-dimethoxy-4-chlorobenzene and the product is treated with aqueous copper sulphate containing triethanolamine (2); cotton fabric is padded with a solution containing 2:3-hydroxy-naphthoylaminobenzene, developed with diazotised 2-amino-4-dimethylamino diphenylsulphide, dried and printing with a sodium formaldehyde sulphoxylate printing paste to obtain a white discharge on brown ground (3).
Patent GB-1119391-A (GB)
Title: Improvements in means for controlling audio-frequency electrical signals
Inventor: LANGDALE-BROWN KEITH GREGORY
IPC: H03G3/04
Filed: 1966-05-12
Abstract: 1,119,391. Amplifier gain controls. BRITISH BROADCASTING CORP. 3 May, 1967 [12 May, 1966], No. 21198/66. Headings H4J and H4R. A microphone amplifier channel includes a microphone 10, two variable gain amplifiers 13 and 14 and two faders, or attenuators, 15 and 16. The amplifier gain controls are coupled, preferably pre-set, and arranged so that, on adjustment of gain from maximum initially the gain of amplifier 14 is reduced, then the gain of amplifier 13 is reduced, and finally the gain of both amplifiers is further reduced simultaneously. Similarly, the fader controls are coupled so that initially the attenuation of fader 16 is increased, then the attenuation of fader 15 is increased.
Patent GB-1087323-A (GB)
Title: Improvements in or relating to electron beam discharge tubes
Inventor: BENNETT MAURICE RONALD
IPC: H01J29/52
Filed: 1964-05-22
Abstract: 1,087,323. Cathode-ray tubes. ENGLISH ELECTRIC VALVE CO. Ltd. March 3, 1965 [May 22, 1964], No. 21214/64. Heading H1D. In a deflection modulated beam tube the modulation deflection plates 3, 4 and the compensating deflection plates 5, 6 have connections as shown and the connections 10, 11, 12 are brought outside the envelope to a potentiometer 9 as shown. The potentiometer may be sealed to the outside of the envelope. The compensating plates may include a pair located on either side of the deflection aperture 8 or on both sides. The invention may be applied to storage tubes and cathode-ray oscilloscope tubes.
Patent GB-687274-A (GB)
Title: Improvements in or relating to loom picking motions
Inventor: HEATH BARRIE
IPC: D03D49/42
Filed: 1949-08-15
Abstract: 687,274. Pneumatic picking-motions for looms, HOBOURN AERO COMPONENTS. Ltd. Aug. 14, 1950 [Aug. 15, 1949; Nov. 9,1949], Nos. 21225/49 and 28688/49. Class 142(iii) A piston is moved by compressed air to cause picking and is also returned by compressed air, the picking stroke being checked by air compressed in advance of the piston. In one embodiment, Fig. ?, .a piston 5 in a cylinder 1 is mounted as an extension of the shuttle race and air is admitted from a port 42 to move the picker 9. Air in advance of the piston passes through a one-way valve 11 until the piston covers a port 12 giving access to the valve when residual air in the cylinder is compressed and checks the piston. the piston is returned at a slower rate by air entering the cylinder through a one-way valve 16 controlled by a needle valve 15. In a second embodiment, Fig. 8, the cylinder 1 is mounted beneath the shuttle race. The picker is moved by air entering through a port 50 behind the piston 47, the piston and the picker 46 being connected by a rod 43. The piston is checked by the compression of the residual air when the piston covers an outlet port 52. Air enters the cylinder through a one-way valve 57 to return the piston. In this embodiment a device checking the return stroke of the picker may be provided comprising a spring-urged plunger 67 surrounded by a fluid which resists its movement. A lost-motion connection may be provided between the picker and the piston rod comprising a collar 66 secured to the rod 43 and which allows the picker to move along the rod a distance equal to the gap between the inside faces of arms 62, 63 of the picker. The picker may be checked on its picking stroke by a block of rubber 71 on a guide rod 60. In both embodiments the air is admitted and exhausted to and from the cylinder through a rotary distributer valve, driven by a belt, and which turns through 180 degrees to change over the connections for the air supply. The passage in the rotary valve through which air passes to return the piston may include an adjustable restrictor valve.
Patent GB-681541-A (GB)
Title: Improvements in telecinematography
IPC: H04N5/84
Filed: 1947-08-05
Abstract: 681,541. Television. PARAMOUNT PICTURES, Inc. Aug. 5, 1947 [March 20, 1946], No. 21239/47. Class 40 (iii). Apparatus for photographing with a standard kinematograph camera the image on the screen of a television receiver tube operating at a different standard rate comprises an electronic generator operating at the same frequency as the camera and producing pulses which blank out the cathode-ray beam during the intervals of film movement. In the system shown, for a television system producing 30 double-interlaced pictures per sec. and a camera having 24 exposures per sec., 60-cycle power frequency is rectified by a full-wave rectifier 1 and the rectified output controls a blocking oscillator 2 producing 120 pulses per second which in turn control a multi-vibrator 3 producing 24 squarewave pulses per second, each having a duration of <1>/120th of a second, the normal duration of film movement. These pulses are applied as blanking pulses to the reproducing tube 4. The camera 5 is also driven from the 60-cycle mains and produces similar pulses which are synchronized in phase with the blanking pulses with the aid of a monitor tube 6 to which both sets of pulses are fed. The shutter is removed from the camera and, to prevent light on the screen affecting the film during film movement, the screen of the tube 4 is of the short-persistence type.
Patent GB-1306998-A (GB)
Title: Storage box for cassettes containing sound-recording tape
IPC: G11B23/023
Filed: 1970-05-04
Abstract: 1306998 Cabinets STAAR S A 4 May 1970 [16 March 1970] 21280/70 Heading A4B A storage box for cassettes containing soundrecording tape comprises a plurality of compartments each adapted to contain a cassette, each cassette having apertures in its wall providing access to the hubs of tape reels, wherein a plate 4 Fig.3, is mounted slidable longitudially of a compartment, and is provided with an element 7 which abuts the end of the cassette, and is moved against spring 18, locking elements 10 being mounted on the plate and adapted to engage the tape reel hub, co-operating elements 12, 15, 28 being provided on the compartment wall to cause the locking elements to be moved into the reel hubs as the cassette is inserted, and to retain them there at the end of the motion, and to allow the locking members to be withdrawn on removing the cassette. Cut-out flexible arm 20, Fig.5, with bulbous end 22 of the top wall ensures that the cassette is firmly gripped against vertical movement. Member 29 biased by spring 30 acts to press tape 21 against presser pad 31 (contained in the cassette), when the cassette is fully inserted.
Patent GB-577734-A (GB)
Title: Improvements in moving floors for vehicles
IPC: B60P1/38
Filed: 1944-10-31
Abstract: 577,734. Vehicle fittings for unloading. WALKER, S. W. Oct. 31, 1944, No. 21288. [Class 78 (iv)] The floor of a vehicle is formed by a belt which is moved backwards or forwards by ropes passed round a winding drum disposed centrally between the runs of the belt. The belt 1 passes over a series of coaxial drums 4, 5, Fig. B, and its ends are connected to ropes 7. Each rope passes from the end 10 to a grooved pulley 12 disposed between adjacent drums 4. It is led around this pulley to a grooved winding drum 11 on to which it is wound. From this drum the rope is passed around a grooved pulley 19 between the drums 5 to the other end 9 of the belt. The drum 11 is moved longitudinally during rotation to keep the rope in alignment with the end pulleys. This movement may be caused either by threading the shaft 29 into its bearings, or by mounting the shaft in floating bearings and engaging the grooves on the drum by rollers 26 which are carried by brackets on a transverse member attached to the vehicle frame. Similar wheels 15, 23 engage the grooved pulleys 12, 19 and drums 4, 5, respectively. Each rope may be in two parts, the inner ends of which are passed through apertures in the surface of the drum 11 to its interior, where they are secured in such a manner that the tension can be adjusted.
Patent GB-736930-A (GB)
Title: Improvements in or relating to electric battery lamps
IPC: F21V17/02
Filed: 1953-07-31
Abstract: 736,930. Electric battery tamps; lantern screens. FORSTER, H. A. R. July 27, 1954 [July 31, 1953], No. 21299/53. Classes 39 (2) and 75 (4). In an electric battery lamp for signalling and like purposes, and comprising a rectangular casing provided with a slideway for differently coloured light-transmitting slides movable selectively into position in front of the lamp bulb, the casing, which has removable end closure caps 40, 38 at the top and bottom respectively, is provided on its front face with a slideway consisting of a channel plate 22 secured in position by rivets 31 along side flanges 22a and forming a guide and housing for transparent coloured slides 32, 33 which can be moved upwardly into a position between a circular opening in the front of the casing and a clear glass or lens 24 permanently mounted on the front of the slideway; the lamp bulb is screwed into a central aperture in a withdrawable reflector which is held in position by lugs pressed out of the wall of the sheet metal casing 1. A blade spring with parallel upwardly extending limbs 29, 30 disposed between the two coloured slides serves to retain the slides in a set position, the limbs of the spring being preferably offset in opposite directions. Manipulation of the slides is effected by means of finger pieces 36, 37 attached by rivets to their lower ends and offset so that they extend through vertical slots 27, 28 in the front of the channel plate 22. In the example the green slide 32 is in its upper position, and the red slide 33, which is in its lower or inoperative position, is recessed at 35 to clear the rivet 31. The upper and lower end caps 40, 38 are removably held by pairs of pins 41, 39 which project laterally from blade springs mounted within the battery casing. The underside of the cap 40 supports a screwthreaded holder for a spare. bulb and also provides space for a rolled tape. A push-button switch 18 mounted on the upper cap 40 may be retained in the " on " position by turning it through an angle after depressing it against a contact strip.
Patent GB-1467466-A (GB)
Title: Vacuum filled liquid container with vacuum cut-off valve
IPC: A61C17/06
Filed: 1974-05-14
Abstract: 1467466 Vaccuum filled liquid tanks DAVOL Inc 14 May 1974 [17 May 1973]  21356/74 Heading FIR [Also in Division F2] In a vacuum filled liquid tank the suction port 28 in the lid 12 is closed by a float valve 32 when the liquid reaches a given level. The float valve comprises a cup shaped member 44 having at least one surface which seals the outlet port. This surface comprises either the rim of the cup which engages the lid around the inlet port or the base of the cup which engages the port itself or both these surfaces, in which case the base is flexible and after the rim has sealed on the lid, the base is drawn into sealing engagement with the port. The cup is attached to the lid by a flexible arm 36. A flange 42 is provided on the cup to prevent liquid splashing into the cup and to assist-lift with a foam covered liquid.
Patent GB-169687-A (GB)
Title: Improved brown dyestuffs
IPC: C09B49/02
Filed: 1921-08-12
Abstract: Sulphuretted dyes, dyeing cotton reddish-brown shades from a sulphide bath, are obtained by heating 2 : 4 : 8 - trinitro-1,-naphthol or 2 : 4 : 5-trinitro-1-naphthol, or a mixture thereof, with alkali polysulphides.
Patent GB-261130-A (GB)
Title: An improved plant support
IPC: A01G9/12
Filed: 1925-08-27
Abstract: 261,130. Pangbourne, A. E. Aug. 27, 1925. Clips, flexible-jaw.-A strip metal plant support comprises two integral or separable parts bent into ring-like forms and one adapted to surround a stake and the other to enclose one or more plant stems, the part surrounding the stake being closed and secured by means of a flat loop slid along the flat metal strip and over its end. Fig. 1 shows a form in which the plant-enclosing part B of a zinc support is bent into a number of rings or loops C to receive the stems. The part D for surrounding the stake may be serrated at its edges to grip the stake. Both parts B, D are closed and secured by sliding loops A. Fig. 2 shows part of a support in which the stake-gripping part is provided with a socket C<1> to receive the depending ends of a strip bent into ring shape for enclosing the plant. This ring may be arranged so as to project away from the stake or so that the stake is at the centre of the plant. Fig. 3 shows an appliance for supporting two stems. It is provided at the centre with a depending tongue to fit into the socket C', Fig. 2. In another form the plant-supporting part consists of a ring suitable for a single stem.