baber/WOPTO huggingface dataset:
Patent GB-917609-A (GB)
Title: Magnetic flux oscillators
Inventor: METCALFE ERIC
IPC: H03K3/30
Filed: 1960-11-23
Abstract: 917,609. Transistor oscillator circuits. BENDIX ERICSSON U.K. Ltd. Nov. 3, 1961 [Nov. 23, 1960], No. 40213/60. Classes 40 (5) and 40 (6). An oscillator of the type comprising a transformer winding connected between the collector electrodes of two transistors which are rendered alternately conducting by switching windings on the transformer and in which a variable voltage is connected to the centre tap of the transformer so as to vary the oscillation frequency, has a resistor connected in the common emitter circuit of the transistors to limit the emitter-collector current. Fig. 2 shows an oscillator of the type in which feedback windings S1 and S2 cause transistors T1 and T2 to conduct alternately, the change-over of conduction occurring when the square-loop core saturates. The frequency of oscillation depends on the value of the voltage V1 and a more linear relation is obtained by connecting a resistor R in the common emitter circuit to limit the surge of transistor current when the core saturates. A further increase in linearity is obtained by the provision of clamping diodes D1 to D4 which maintain the emitter-base voltage of the conducting transistor close to zero. To still further linearize the relation between the control voltage and oscillator frequency an additional winding W (Fig. 3) of the transformer may provide a voltage dependent on the rate of change of current in the transformer primary and this may be rectified at X and compared in amplifier A with the control voltage VC to provide a modified control voltage. A capacitor C1 may be provided to prevent operation by unwanted impulses. Fig. 4 shows a practical embodiment of Fig. 3 in which the basic oscillator comprises transistors T1, T2 and transformer windings M1, M2, S1, S2, output voltages being taken from transistors TO1 TO2 coupled to the bases of the oscillator transistors. The transformer has further output windings W1 and W2 and feedback windings S1 and S2 which render transistors X1 and X2 alternately conducting so as to provide an output voltage in R4 dependent on the frequency of oscillation. This voltage is compared in amplifier A with the control voltage fed through R14 and R13 to the amplifier, and control of the oscillator frequency is effected from the output of amplifier A through a transistor TR. A rectifier D6 provides a bias for the transistors X1, X2, while a thermistor t mounted adjacent to the transformer core helps to maintain the oscillator frequency constant. A Zener diode D5 provides a stabilized bias voltage for clamping diodes D1 and D2. Fig. 5 shows a circuit having two input terminals i1 and i2 coupled to respective output terminals of Fig. 4 and which provides an output at 3 for each transition of the oscillator output waveform.
Patent GB-1188943-A (GB)
Title: Climbing Wheels.
IPC: A61G5/06
Filed: 1966-09-08
Abstract: 1,188,943. Wheel; facilitating passage over stairs. B. SHAYER. 6 Dec., 1967 [8 Sept., 1966], No. 40251/66. Headings B7C and B7D. A wheel 10 is provided with spring-loaded members 14 to enable it to surmount obstacles such as stairs. The members may either be located in housings 15 attached to the wheel or in slideways formed therein. Provision may be made to lock the members in their retracted positions (Fig. 5, not shown). Detachable inserts 22 may be mounted on the ends of the members. The wheel may be used in conjunction with an ordinary wheel and may be mounted on carriages for disabled persons.
Patent GB-868583-A (GB)
Title: Improvements in packaging apparatus
Inventor: WELVAERT CLAUDE ALEXANDRE CHAR
IPC: B65B51/18
Filed: 1958-12-18
Abstract: 868,583. Packaging-machines. ROSE BROS. (GAINSBOROUGH) Ltd. Dec. 10, 1959 [Dec. 18, 1958], No. 40823/58. Class 94(1). The supporting pulleys 18 at the entrance end of a pair of opposed belts 16 for maintaining end closing flaps of a package in position during. drying of adhesive, are mounted for movement towards and away from each other, the pulleys moving away as a package enters the belt trip and then moving towards each other to grip the package. The entering speed of the package is the same as the belt speed, the latter being less than that of the conveyer feeding the packages to the belts. The pulleys are mounted on levers 23 and are urged towards each other by springs 27. Piston- and-cylinder means, preferably hydraulic, 24, 26 controlled by a master cylinder 28 move the pulleys apart as packages are fed to them up a ramp 12 by a conveyer 14 and a reciprocating pusher 17. The pulley movement is derived from a cam 34 operating the master cylinder. The space between the belts is adjustable for various package sizes, the stroke of the pistons 24 being limited by stops 41.
Patent GB-1412298-A (GB)
Title: Electrical signal initiating keyboards
IPC: H04M1/23
Filed: 1972-09-05
Abstract: 1412298 Keyboards POST OFFICE 29 Nov 1973 [5 Sept 1972] 41050/72 Heading G4H [Also in Division H1] An electrical signal initiating keyboard includes a number of motion transmitting elements, a layer of resiliently deformable insulating foam material having at one face thereof a plurality of electrically-conductive tracks defined by conductive particles, and a plurality of terminals connected to associated ones of the tracks, the arrangement being that each motion transmitting element is operable to deform a respective area of the foam material to thereby change the resistance between terminals associated with that particular area. Fig. 3 shows a typical key 3, depression of which compresses a respective area of a sheet 1 of insulating foam so that a respective two out of fifteen tracks 2 of conductive particles make contact, through a respective hole 13 in a spacer 12, with a conducting layer 14. Seven signals are applied to the fifteen tracks through connections whereby three of the signals go to a respective track each and the other four signals go to a respective three of the tracks each. Consequently, the layer 14 receives two out of seven of the signals depending on the key pressed. Fig. 5 shows a modification in which the keys are integral with the top plate which is flexible, and the foam sheet 1 and the conducting layer 14 are interchanged, layer 14 being of flexible polymeric material. The spacer may be omitted.
Patent GB-1356390-A (GB)
Title: Radiation-sensitive polymeric compositions
IPC: G03F7/038
Filed: 1970-08-26
Abstract: 1356390 Radiation-sensitive compositions KODAK Ltd 26 Aug 1971 [26 Aug 1970] 41108/70 Addition to 1230772 Headings C3P and C3R [Also in Division G2] A radiation-sensitive coating composition for producing lithographic printing plates comprises a polyester derived from a polyol and a polycarboxylic acid having the formula in which Z is the number of atoms necessary to form an unsaturated bridged or unbridged non- aromatic carbocyclic nucleus having 6-7 carbon atoms and having an acid number of from 26-30 mg. of KOH per gram; from 0À2 to 1À0 mole per mole of polyester of a copolymer of from 6 to 10 moles of methyl, ethyl, propyl or butyl acrylate and one mole of ethyl N - acryloylglycinate, N - acryloyl - N<SP>1</SP>- n - butylglycinamide, ethyl N - acryloylglycylglycinate, N - acryloyl - N - ethylglycinamide or N - acryloyl - N<SP>1</SP> - n - hexylglycinamide and a 1,2 diazoketo sensitizer. The sensitizer may be 1,2 diazoketo-trihalomethanes as disclosed in Specification 1,230,171 or 1 - diazo - 2 - oxo - 1,2 - dihydronaphthalenes as disclosed in Specification 1,331,441, and comprises from 10-40% by weight of the polyester and copolymer. The composition is coated on a lithographic support, preferably hydrophilic, which may be of metal, paper or polymer, and a resist image may be produced by imagewise exposure to actinic radiation which renders some of the polymer alkali-soluble, this being washed off with 10% Na 3 PO 4  solution. The surface is then swabbed with water and treated with H 3 PO 4  gum arabic solution to give the lithographic plate. The polyester may be formed from ethylene glycol and a mixture of cis-4-cyclohexene-1,2-dicarboxylic anhydride and hexachloro-2 : 2 : 1-bicyclo-heptene dicarboxylic anhydride. Image indicating leuco and fugitive dyes may be added to the coating composition.
Patent GB-1034886-A (GB)
Title: Spacer for dual wheel rims
IPC: B60B11/06
Filed: 1963-10-18
Abstract: 1,034,886. Vehicle wheels. FIRESTONE TIRE & RUBBER CO. Oct. 18, 1963 [Feb. 6, 1963], No. 41201/63. Heading B7C. A spacer ring for use between the dual rims 16, 18 of a wheel 12 comprises a continuous, annular base 30 having circumferentially spaced, radially outwardly protruding, transverse corrugations extending to the axial margins of the spacer ring, the said margins being turned radially outwards to form radiallyextending flanges 32 adapted to engage mounting rings 20, 22 on the wheel rims 16, 18 respectively, the flanges 32 having a wavy configuration. The corrugations may be interrupted or form two independent series at the marginal edges of the spacer ring. The spacer ring and rims 16, 18 are secured to the wheel by means of nuts and clamps.
Patent GB-870972-A (GB)
Title: Zigzag filter element and method of making it
Inventor: SUMMERS JAMES JOSEPH
IPC: B31D3/02
Filed: 1959-12-07
Abstract: 870,972. Filtering gases. MINE SAFETY APPLIANCES CO. Dec. 7, 1959, No. 41542/59. Class 8(2). In a method of manufacturing zig-zag filter elements from a continuous strip 2 of material such as filter paper the filter paper strip 2 is initially cut to the desired width and then selectively folded back and forth on itself, each layer being glued to its neighbour along spaced tack lines 8, the lines in alternate folds being shifted transversely to the mid-point of its neighbouring patterns, the bais 8 being drawn perpendicular to the folds of the filter stock. The end sheets of the filter stock are glued to rigid panels 9 and pulled apart to expand the stock, whereupon two more panels 10 are inserted between the end panels 9 to hold them apart. Such a filter now consists of a series of elongated oval section pockets alternate rows of pockets 11 and 12 being closed at opposite ends. After joining the four panels 9 and 10 to make a rigid frame, the sides 10 are masked and then in turn are dipped into a sealing compound to provide a seal 13 between the filter and the sides 10. The filter paper strip 2 may be precut into a continuous diamond pattern to produce a filter stock with pockets of varying width, arranged diagonally with respect to its framework, or the rectangular stock expanded cylindrically in either of two perpendicular directions to form cylindrical filters, the two ends being glued together, said cylindrical filters being provided with an outer rigid cylinder and an inner plug or endcap according to whether the pockets extend in an axial or radial direction. Sagging of long filter elements may be avoided by preforming or precutting.
Patent GB-1028611-A (GB)
Title: 11-oxygenated-pregnenolone derivatives
IPC: C07J75/00
Filed: 1962-11-02
Abstract: Novel steroids, comprising steroids of the formulae <FORM:1028611/C2/1> <FORM:1028611/C2/2> <FORM:1028611/C2/3> (wherein R is H or OH; X1 is a - or b -hydroxymethylene or carbonyl; Y1 is chlorine, bromine or iodine; R1 is hydrogen, hydroxy or acyloxy; Y is hydroxy or acyloxy; R2 is hydrogen or acyl; Z is selected from <FORM:1028611/C2/4> <FORM:1028611/C2/5> Z1 is <FORM:1028611/C2/6> Z5 is <FORM:1028611/C2/7> and W is alkylene of at most 8 carbon atoms being attached to the oxygen atoms by a direct chain of 2 or 3 carbon atoms; the acyl radicals being derived from organic carboxylic or sulphonic acids) and 3b -acetoxy-5-pregnene-11,20-dione and 3b ,11b -dinydroxy-5-pregnen-20-one and its 3-acetate; and other steroids of the wider general formula <FORM:1028611/C2/8> (wherein Y2 is chlorine, bromine, iodine, fluorine, hydroxy or acyloxy and R, X1 and Z are as above defined except that R has the additional value of acyloxy) are prepared by reacting a 6b , 11 - dihydroxy - 3,5 - cyclopregnan - 20 - one which may contain a 21-hydroxy group and, at the 16 and 17 positions, any of the groups Z except the isopregnanes, with a hydrogen halide in a suitable solvent to give the corresponding 3b  - halo - 11 - hydroxy - 5 - pregnen - 20 - one or, in compounds wherein Z is 16,17-unsubstituted or 16a -methyl-17-unsubstituted, the corresponding 17a -isomers (which may be separated by standard techniques or used in admixture with the 17b -compounds) or, when dilute aqueous hydrohalic acid is used, the corresponding 3b ,11 - dihydroxy - 5 - pregnen - 20 - one, oxidizing the 3-halo compounds to the corresponding 11-ones, treating the 3b -halo compounds with a metal salt of an organic carboxylic or sulphonic acid in a suitable solvent to give the corresponding 3-acylates, which can be hydrolysed to the 3-ols and these re-esterified in the 3- and/or 21-position, forming 20-ketals (during which process the 17-isopregnanes and reconverted to normal pregnanes), reducing 11-ketones to 11b -ols, removing the 20-ketal group, and re-esterifying to give 3-acylates or 3,21-diacylates. Examples are given.  The steroids of the invention, which are stated to be sedatives, tranquilizers, muscle-relaxants and analgetic c.n.s. depressants, and also to be of use as stimulants and psychic energizers, may be made up into pharmaceutical compositions with suitable carriers.  These may take the form of tablets, powders, capsules, pills, solutions, emulsions, suspensions, syrups or elixirs.
Patent GB-1358766-A (GB)
Title: Colour television signal recording and reproducing system
IPC: H04N9/82
Filed: 1971-09-08
Abstract: 1358766 Recording colour television signals MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 8 Sept 1971 [9 Sept 1970 (2) 14 Sept 1970 (2)] 41895/71 Heading H4F A colour television signal is recorded on monochrome film by combining the luminance and two chrominance signals in frequency multiplex manner, at least one chrominance signal being amplitude-modulated on a subcarrier and the subcarrier being suppressed. As shown in Fig. 2 the I signal is so modulated on to a 1À25 MHz subcarrier, the Q signal is unmodulated, and the luminance signal is amplitude-modulated on to a 5 MHz subcarrier in vestigial sideband form, the integral relationship between subcarrier frequencies enabling the recovery of the 1À25 MHz subcarrier from the luminance subcarrier. Such an arrangement is stated to eliminate interference effects on the luminance signal due to harmonics of the colour subcarrier. In a modification of this arrangement (Fig. 4, not shown) the I and Q signals are combined in phase quadrature to modulate the 1À25 MHz subcarrier. Other similar arrangements with subcarrier frequencies so chosen as to facilitate the recovery of a colour signal to NTSC standards are described. In all these arrangements one colour frame is recorded on one film frame by the synchronized scanning thereof.
Patent GB-882492-A (GB)
Title: Semiconductor monostable trigger circuit
IPC: H03K3/284
Filed: 1958-12-30
Abstract: 882,492. Transistor monostable state circuits. INTERNATIONAL BUSINESS MACHINES CORPORATION. Dec. 30, 1958 [Dec. 31, 1957], No. 42092/58. Class 40(6). A mono-stable circuit comprises two transistors of opposite conductivity type having a capacitor connected between their emitters, the capacitor being charged from a potential source when the two transistors are non- conducting and discharged through the transistors in response to a pulse applied to the base of one transistor. In the rest condition on the circuit shown both transistors are non- conductive and a capacitor 6 is charged to the voltage of battery 10. An input pulse applied to terminal 13 is differentiated in a circuit 11, 12 and causes transistor 1 to conduct. The resulting change of voltage at its collector causes transistor 2 also to conduct and current to flow in the load 20, 21, 22. Capacitor 6 now commences to discharge through a path comprising the emitter base junction of transistor 2 the collector emitter path of transistor 1 and resistor 5 ;and this current maintains the two transistors conducting until the capacitor is discharged when -they both return to the original cut-off condition. The collector and emitter loads 17, 15 are approximately equal and when. the transistor 2 first becomes conductive the load capacitance 23 is in a discharged state so that substantially the whole of the supply voltage is dropped across resistor 15 causing the emitter current to be increased, the increase being supplemented by a rapid initial discharge of capacitor 6 so -that the load capacitance is very rapidly charged. Resistor 9 may be replaced by a diode in order to speed up the recharging of capacitor 6 after the circuit has operated (Fig. 2 not shown). In Fig. 3 (not shown) resistor 17 and the load are replaced by the winding on a magnetic core. In addition a diode is provided between the collector of transistor 1 and battery 34 to limit the voltage appearing at the collector and an inductor is connected in parallel with resistor 5 to make the capacitor discharge current more nearly constant so that a square output wave is obtained. In addition a gating potential may be applied to the base of transistor I so as to gate the input applied to terminal 13.
Patent GB-1534456-A (GB)
Title: Optical scanning device
IPC: G02F1/29
Filed: 1977-10-11
Abstract: 1534456 Deflecting light STANDARD TELEPHONES & CABLES Ltd 11 Oct 1977 42265/77 Heading G2F A two dimensional deflector for linearly polarized light comprises two positive dielectric anisotropy nematic liquid crystal cells spaced by a retardation layer for altering the polarization direction by 90 degrees, each cell comprising four parallel electrodes arranged about the liquid crystal layer as two registered'pairs whereby a refractive index gradient may be set up by applying a potential difference between one electrode and the other three (partial conversion to homotropic alignment), the electrodes of the cell being mutually at 90 degrees. Homogeneous alignment is each cell is obtained initially with a voltage between one pair of registered electrodes and the other, The incident polarization direction is normal to the electrodes of the first cell, and hence, after passing the retardation layer, also at 90 degrees to the electrodes of the second cell.
Patent GB-423677-A (GB)
IPC: G03C7/14
Abstract: 423,677. Colour photography and kinematography. BOCCA, C., 4, Via Loredon, Padua, Italy. Aug. 4, 1933, No. 21975. Convention date, Aug. 8, 1932. [Classes 97 (i) and 98 (ii)] In a method of producing photographic or kinematograph positives for projection in natural colours, a series of colour record images are printed on a single diapositive through a parallel-line diffraction grating, the lines of the grating being given a different direction for each image. In projection, the diapositive is projected through colour filters arranged in sectors in the plane of the diffraction images formed. In carrying out the process in the case of three colour-record images, one diapositive is printed on a plate or film sensitized with silver or bichromate through a parallel-line grating having 500 to 10,000 lines per cm. The second diapositive is then printed in register through the same grating turned through 60‹ and the third is then printed with the grating turned through a further 60‹. The resulting print is projected through a filter having six sectors, coloured red, green, and blue, diagonally opposite sectors being of the same colour, and a small opaque disc to cut out the central non-diffracted image. The Figure shows the projection arrangement in which L is the source of light, C a condenser, WXYZ the diapositive, O the projection objective and B the filter which is placed where the image of the source of light is formed by the lens system. As a source of light a hole in an opaque diaphragm, strongly illuminated from the rear may be used. Specifications 4601/99 and 11466/99, [both in Class 98], are referred to.
Patent GB-1402101-A (GB)
Title: Dyes of the perylene tetracarboxylic acid diimide series
IPC: C09B5/62
Filed: 1972-09-14
Abstract: 1402101 Colouring synthetic resins BADISCHE ANILIN- & SODA-FABRIK AG 14 Sept 1972 [15 Sept 1971] 42677/72 Headings C3P and C3R [Also in Division C4] Perylene pigments of the general formua wherein A and A<SP>1</SP> are H or methyl and R and R<SP>1</SP> are C 1 -C 12  alkyl, phenyl or aralkyl optionally substituted in the phenyl or aryl moiety by one or more Cl, Br, methyl, ethyl, methoxy and/or nitro substituents or alkyl substituted by a 5- or 6-membered hetero-cyclic ring, e.g. pyridine, furfural or picoline and wherein the perylene nucleus may contain 1-4 halogen atoms are used in Examples 2-15 to colour polystyrene and p.v.c. and in Examples 17 and 18 to colour alkyd resin modified with soya bean oil. Other substrates are polyethylene, polypropylene, polycarbonates, cellulose esters, polyacrylates, polyamides, p.a.c. and copolymers of styrene with butadiene, acrylonitrile and/or acrylic esters.
Patent GB-1357571-A (GB)
Title: Lubricant for high temperature non-chip metal forming
Inventor: HOLINSKI R
IPC: C10M173/02
Filed: 1971-09-14
Abstract: 1357571 Lubricants DOW CORNING GmbH 14 Sept 1971 [22 Sept 1970 24 Feb 1971] 42821/71 Heading C5F A metal working lubricant comprises (by weight) 35-47% alkali metal sulphate, 14- 26% borax, 3À5-10% potassium chloride, 3À5-10% sodium acetate trihydrate and 10- 32% pulverized graphite having a particle size not exceeding 10 microns. The composition may be applied as an aqueous solution/dispersion and may also contain 5-10% ammonium sulphate, 10-30% of a mixture of equal parts of magnesium hydroxide and a compound selected from derivatives of thiatriazole, azodicarbonamide or azisobutyric acid dinitrile, 1-3% sulphonated aliphatic polyester or alcohol or sodium alkyl naphthalene sulphonate and 1-4% polysaccharide, e.g. alkyl cellulose or an alginate.
Patent GB-1407681-A (GB)
Title: Acoustic wave collector device for determining the direction of a wave source
IPC: G21C17/02
Filed: 1972-09-15
Abstract: 1407681 Acoustic receivers for direction finding; acoustic reflectors COMMISSARIAT A L'ENERGIE ATOMIQUE 15 Sept 1972 [16 Sept 1971] 42946/72 Headings H4J and H4X The direction of a sound source is determined by a movable device including a horn 1 (Fig. 3) in the form of a parabaloid of revolution having an internal acoustically reflective concave surface 2. Its apex has an elliptical aperture 3 oblique relative to the horn axis X 1 . The horn is rotatable about an axis Y perpendicular to the aperture 3 by means of a conical gear-wheel 10 which engages a toothed rim 11 on horn 1. A part 6 is preferably surrounded by a cylinder 18 (Fig. 4) and the device can be moved towards and backwards relative to the cylinder 18 by an actuator 19. It can also be rotated as a whole by a gear-wheel 16 engaging teeth 17 on an abutment 8. The focus F of the horn 1 coincides with the focus of an acoustically reflecting concave surface 13 in the form of a parabaloid of revolution. Thus the two surfaces 2, 13 are inverted with respect to one another. Sounds reaching the horn 1 are reflected by the surfaces 2 and 13 to form a parallel beam which travels along a waveguide 20 to an acoustic-electric transducer (not shown). A second embodiment (Fig. 5, not shown) dispenses with member 12 and reflecting surface 13. Instead, the waveguide (21) is continued inwardly where it is terminated by a portion (12a) in the form of a parabaloid of revolution coaxial with its cylindrical portion and truncated near its apex along a plane extending through its focus. A third embodiment (Fig. 6, not shown) has a plate (25) disposed obliquely relative to the horn axis (as at line D, in Fig. 3) and a piezoelectric element (26) is secured to the side of plate (25) remote from horn 1. A cable connects to the piezoelectric element (26) and extends to the rear of the device. The plate (25) is of thickness a multiple of 1/2 where # is the wavelength of the sound source in the piezoelectric element (26).