baber/WOPTO huggingface dataset:
Patent GB-1516397-A (GB)
Title: Transducer circuit
IPC: G01R21/127
Filed: 1975-06-13
Abstract: 1516397 Measuring power ROCHESTER INSTRUMENT SYSTEMS Inc 13 June 1975 [22 July 1974] 25466/75 Heading G1U [Also in Division G4] A circuit for multiplying two signals comprises means feeding one signal to control a pulse-width modulated, constant frequency generator, means feeding the other signal to a switch controlled by the generator output and a filter connected to the switch output to produce a D.C. signal, wherein the generator includes an operational amplifier having a phase-shift network in a negative feedback path. In an electronic wattmeter, the generator comprises amplifier 19 with a phase-shift network 22-24,  26-28 and Zener-diode amplitude limiting 29, 30. With no input at B, the generator oscillates at a frequency, determined by the network, much higher than the power line frequency, and the oscillation has a 1:1 mark/space ratio. The value of the input at B, derived from a current transformer 40 monitoring power line current modulates the output pulse width according to its instantaneous sign and magnitude, Fig. 2 (not shown). The modulated pulse signal operates a transistor switch 70 which receives a signal representing the power line voltage via transformer 51. The transistor output E is thus pulse-width and amplitude modulated by the current and voltage respectively. This signal, Fig. 2E (not shown) is converted to D.C. by network 56-58,100 and amplified. As shown, the voltage signal is phase-shifted by 90 degrees, 48 which results in a measure of reactive power. If this is omitted, real power may be measured. Power supplies for the circuitry are derived from the line being monitored via transformer 7 and rectifier and regulators 8, 9. The circuit may be used to multiply D.C. values as well as A.C., and amplifier 46 may have parallel inputs for 4-wire supply power measurement.
Patent GB-1010959-A (GB)
Title: Method of treating workpieces with abrasives
IPC: B24B31/00
Filed: 1964-06-19
Abstract: Workpieces are tumbled in a rotating or vibrating device with sintered bauxite.  Natural bauxite is calcined and reduced to a fine particle size, compacted to form agglomerates having the desired range of sizes, and the agglomerates are sintered.  The material may have a random shape or be formed into triangles, triangular pins, circular pins, spheres, slugs or cones. The sintered agglomerates preferably have an average crystal size of 5 to 8 microns.
Patent GB-1106504-A (GB)
Title: Improvements relating to silver iodobromide emulsions
IPC: G03C1/015
Filed: 1966-06-08
Abstract: 1,106,504. Silver iodobromide emulsions. E.I. DU FONT DE NEMOURS & CO. June 8, 1966 [June 8, 1965], No. 25573/66. Heading G2C. A photographic silver iodobromide emulsion of reduced sensitivity to actinic radiation is prepared by forming a water-permeable colloidsilver iodobromide emulsion at a pH of 4-10, sensitizing it to red and green, and subsequently lowering the pH to not above 2. The pH may be lowered, before coating on to a support, by adding acid, or after coating by overcoating with a layer of acid, soaking in an acid bath, or exposing to acid gases or vapours. Specified acids are HC1, HNO 3 , H2SO 4  and CH 3 COOH. The emulsion may be resensitized by increasing the pH to at least 4 with aq. alkali e.g. NaOH, Na 2 CO 3  or NH 4 OH, or by exposing to alkaline gases or vapours e. g. NH 3 , or by applying an electric potential across the moistened emulsion and the support surfaces. Specified supports are paper, glass, the usual polymers, and polyesters formed by condensing terephthalic acid and dimethyl-terephthalate with glycols and cyclohexane-1,4-dimethanol. Conventional binders may be used and the emulsion may contain the usual optical and chemical sensitizers and other addenda.
Patent GB-869060-A (GB)
Title: Improvements relating to modulating circuits, especially for colour television
Inventor: TAIT DAVID RUSSELL
IPC: G06G7/163
Filed: 1956-08-22
Abstract: 869,060. Colour television. ELECTRIC & MUSICAL INDUSTRIES Ltd. Aug. 20, 1957 [Aug. 22, 1956], No. 25588/56. Class 40(3) [Also in Group XXXVI] Relates to a colour television receiver in which the chrominance signal of an N.T.S.C.-type signal is required to be converted into a chromaticity signal, this conversion involving the division of the instantaneous value of the chrominance signal by the instantaneous value of a luminance or other form of brightness signal. The luminance signal x, Fig. 2, is derived by detection of a received carrier of N.T.S.C. form, and the chrominance signal y is derived by separation from the luminance signal after detection and is in the form of modulation components of a sub-carrier fc. The problem may be considered as modulating the chrominance signal by the reciprocal of the luminance or brightness signal. The signals x and y are applied together to the control electrode of a valve 1 and the potential variations across the . anode resistor 3 are applied to a high gain differential amplifier having a pass band limited to the frequency band of the signal x. The output of the amplifier 4 is applied as negative feedback to the suppressor grid of the valve 1 and the gain of the amplifier 4 is arranged to be sufficiently high to ensure that, with an input x, the potential across the load resistor 3 is substantially constant. If it is assumed that it is desired to maintain the potential of the anode of valve 1 at a constant value of unity for an input x, a comparison signal of unity value is applied to input terminal 5 of the amplifier 4. Under these conditions the input signal to the suppressor grid of valve 1 is proportional to 1/x. The signal   1 modulates the input signals x+y and the rex sultant signal across the load resistor 3 represents 1+y/x the signal 1/x therefore appearing as a further   modulation of the carrier wave fc. The Provisional Specification describes an arrangement in which the signal x is applied to the control grid of the valve 1 and the signal y is applied as a comparison signal to the amplifier 4, the required output y/x which is taken from the amplifier 4 also being fed back to the suppressor grid of the valve 1. In a further arrangement described in the Provisional Specification, the input x is applied to the control grid of the valve 1, and the output of the valve 1 is applied through a high gain amplifier to supply a signal 1/x to the suppressor grid of the valve 1 and also to the suppressor grid of a further valve. The signal y is applied to the control grid of the further valve which acts as a multiplier to produce the required signal y/x in its output.
Patent GB-741056-A (GB)
Title: Reflectors for tubular electric lamps
IPC: F21V7/00
Filed: 1952-10-14
Abstract: 741,056. Mounting reflectors on electric lamps. PARKER & OSBORN (PLATE & SHEET GLASS MERCHANTS). Ltd., and OSBORN, C. Jan. 13, 1954 [Oct. 14, 1952], No. 25660/52. Class 75(2). A reflector and clip combination for a tubular electric lamp comprises resilient open jawed clips 1 adapted to snap engage over the lamp 3, and each having on each side thereof a clip 5 which receives a strip reflector 4 extending longitudinally of and parallel to the lamp 3. Each clip 1 is formed of spring steel integrally with its two associated clips 5. The reflectors 4 may be of mirrored glass framed with narrow metal strips (not shown).
Patent GB-169896-A (GB)
Title: Improvements in and relating to spring suspensions for use on railway carriages and road vehicles
IPC: B61F5/30
Filed: 1920-09-06
Abstract: 169,896. Addis, F. H. Sept. 6, 1920. Helical springs. - Spring suspensions for use on railway and road vehicles are constructed of two or more springs of substantially equal strength, differing slightly in their natural frequency of vibration under load and always acting together and under continual compression. The Springs 1, 2, Fig. 2, may be partitioned off by a cupshaped member 3, or if a third spring is used, it may be placed between two cups and may be applied to bogies having compensating beams. Alternatively, pairs of springs 7, 8, Fig. 4. of unequal lengths may be carried upon a beam 9 suspended from the axle box 10 by a bridle 11, the upper ends of the springs supporting a lever- 12 pivoted to a bogie frame 14.
Patent GB-616106-A (GB)
Title: New or improved device for lifting plates, dishes and the like
IPC: A47J45/10
Filed: 1946-08-28
Abstract: 616,106. Devices for lifting plates. WALKER, A. Aug. 28, 1946, No. 25696. [Class 61 (ii)] A device for carrying plates &c. comprises a handle a to which two legs b, perpendicular to the handle, are attached. A block c is secured to the legs b and a U-shaped wire d<SP>1</SP> having extensions d<SP>2</SP> ending in a block d<SP>3</SP>, pivots in it. Sliding on the extensions d<SP>2</SP> is a block e carrying two other legs e<SP>1</SP>. The hooks b<SP>2</SP>, e<SP>2</SP> on the legs b<SP>1</SP> and d<SP>2</SP> engage under opposite edges of a plate to support it and a spring f attached to the block e and bearing on the block d<SP>3</SP> serves to retain the legs d<SP>2</SP> in adjusted position. In a modification the gripping legs are pivoted on the extensions d<SP>2</SP> and consist of S-shaped wires eccentrically mounted so that the device is suitable for two sizes of plate.
Patent GB-590072-A (GB)
Title: Improvements in or relating to handles for electric hand tools
IPC: B25B7/20
Filed: 1944-10-04
Abstract: 590,072. Cables and wire couplings. LYTEZE FIRELIGHTER CO., Ltd., and WARREN, W. T. Oct. 4, 1944, No. 25910/45. Divided out of 590,071, [Group XI]. [Class 38 (i)] A handle for electric hand tools such as soldering irons, sealing or hot irons is transversely and longitudinally divided so that a portion 11 is removable to give access to electric connector bars 14 with separate terminals 16 for the supply leads 25 and the leads 19 of electric part of the tool, so that either set of leads may be independently disconnected. The handle is of wood or other insulating material and has an axial passage for the leads. The opposed surfaces of the two parts of the handle are recessed to receive the leads and the connector bars and also to hold an end flange 31 of a rubber tube 30 through which the supply leads pass. A bolt 33 passes diametrically through the two parts of the handle to hold them together. A bar 28 is screwed into the handle to press on the leads 25 to hold them against an endwise pull. A metal clamp 5 is tightened in a groove 36 on the handle to hold it on a shank 9 of the electric part of the tool. When a three-lead cable is used, earth connection is made through the transverse bolt 33.
Patent GB-713327-A (GB)
Title: Plastering surfaces
Inventor: HITCHINS JOHN WARREN
IPC: E04F13/02
Filed: 1950-10-24
Abstract: Surfaces are plastered by spraying simultaneously with powdered expanded or exfoliated vermiculite and an adhesive, such as a solution of sodium silicate.  The vermiculite may be sprayed by a central nozzle, and the adhesive by a plurality of nozzles, the axes of which are parallel to that of the central nozzle.
Patent GB-503016-A (GB)
Title: Improvements in or relating to agitation and aeration apparatus
IPC: B03D1/16
Filed: 1937-09-24
Abstract: 503,016. Aeration apparatus. TUCKER, S., and MINERALS SEPARATION, Ltd. Sept. 24, 1937, Nos. 25993/37, 34460/37, and 8868 /38. [Class 82 (ii)] In agitation and aeration apparatus for use in froth flotation of the kind comprising an agitation vessel, a rotatably mounted impeller therein and a downcast tube which extends through the liquid-space in the vessel from a point above the designed liquid-level therein down towards the impeller, the tube comprising apertures for the admission of streams of pulp to the impeller from the vessel, the said tube terminates at its lower edge in a plane which intersects the impeller and is of a width sufficient to surround closely the periphery of the upper portion of the impeller without actually touching the same. In the preferred form the apparatus comprises a plurality of vessels 12 each provided with an impeller 15 mounted upon a driving shaft 16 and surrounded by a downcast tube 30 provided with apertures 35. The cylinder 30 is surrounded at the bottom of the vessel by baffle plates arranged at an angle to the radial position in two concentric circles 40. 41. In the bottom of each vessel is provided an inlet for pulp at the underside of the impeller and an outlet 46 near the side, so that the pulp passes in turn through the several vessels, and out over a weir to maintain the pulp level. In each vessel there may be a return flow through an opening 56. The concentrates overflow into the launders 61. Plugs 62 afford access for cleaning. The impeller may have curved or radial blades on its upper side and two radial blades on its lower side. The baffles may be pegs or may be concentric angle members with the roots of the angles pointing to the centre, or may be a grid.
Patent GB-622834-A (GB)
Title: Improved building or paving block
IPC: E04B2/02
Filed: 1946-08-30
Abstract: 622,834. Building and paving blocks. GODITIABOIS, A. Aug. 30, 1946, No. 26082. Convention date, March 29, 1940. [Class 87(i)] A building or paving block 1 is formed on each of two opposite faces with a tongue 6 and a groove 7 both of parabolic section. The edges of the block are bevelled at 3. The blocks may be of curved section for arches. Half blocks are provided by vertical or horizontal division of a full block.
Patent GB-779407-A (GB)
Title: Improvements in or relating to puffing farina
IPC: A23L1/18
Filed: 1953-09-22
Abstract: In producing puffed ready-to-eat farina by a modification of the method of puffing disclosed in the parent Specification, particles of farina, viz., wheat middlings, are freed from air, the air is replaced by steam, the farina is cooked in steam at super-atmospheric pressure and then suddenly subjected to a low sub-atmospheric pressure, e.g. an absolute pressure below 8 inches of mercury.  At this stage, a volatile liquid, e.g. water, containing flavouring or nutritive substances, e.g. salt, sugar and vitamins, may be introduced to form a fine mist which penetrates the puffed farina. The farina may be cooked for 2 minutes in steam at a pressure between 40 and 100 lb. per sq. in. The absolute pressure at the start of puffing may be about 0,2 inches of mercury and may rise during puffing to 4 inches.  The puffed farina may be dried at sub-atmospheric pressure and may be heated during drying.  The puffed farina may be cooled, e.g. to between 150 DEG  and 50 DEG F., and coldset, before being brought under atmospheric pressure.
Patent GB-221972-A (GB)
Title: Improvements in or relating to audible warning signals
IPC: G08B3/10
Filed: 1923-10-19
Abstract: 221,972. Monnot, J. F. Oct. 19, 1923. Diaphragm horns.-In a warning horn, the diaphragm is vibrated with varying frequencies to produce a succession of groups of notes of varying pitch with short intervals of silence between the groups. The horn A has a motor a which drives a cam a<3> adapted to strike a projection a' on the diaphragm a<5> when the operating switch y is closed. Closure of this switch also operates a motor B<1> of a make-and-break device which comprises a continuous contact ring bx and contacts b<1> - - b<4> adapted to engage brushes c<2>, c<1> connected in the circuit of the motor a. The contacts b<2>, b<4> are connected with the contact ring bx through conductors having different resistance values. Rotation of the make-and-break device causes a succession of different currents to drive the motor a at different speeds and produce a succession of notes of varying pitch. A period of silence between the groups of notes is produced when the circuit of the motor a is broken by the engagement of the dead contacts b<1> with the brush c<1>.
Patent GB-913019-A (GB)
Title: Improvements in or relating to map displays
Inventor: SCRIVENER DAVID HAYTER
IPC: G09B29/10
Filed: 1960-07-27
Abstract: 913,019. Maps. KELVIN & HUGHES Ltd. May 19, 1961 [July 27, 1960], No. 26179/60. Drawings to Specification. Class 146 (2). [Also in Group XXXVII] Relates to maps designed to indicate e.g. a vehicle's position in response to a navigational computing instrument of the type in which the map and an indicator are moved relatively in two directions at right angles to each other, means being provided for moving the map and indicator under manual control to set the starting position for example. The map is moved in opposite directions by two motors, one for each, which may be selected by throwing a toggle switch from a central position to the appropriate one of two directions. When the switch is thrown, the selected motor is first connected to a low voltage to move the map slowly and then after a predetermined time, say 2 seconds, is connected to a higher voltage to move the map rapidly. When the switch is moved to its central position, it automatically resets the circuit to give the same sequence. Thus by repeated operation of the switch the map may be edged to the desired position (fine control) and by holding the switch " on," the map may be moved rapidly. The motors may be the same as those driving the map under automatic operation or additional. The indicator may be provided with a similar manual control, the switch of which may be embodied in the toggle switch which is moved left and right for the map and up and down for the indicator.
Patent GB-338916-A (GB)
Title: Improvements in, or relating to, containers for biscuits and the like
IPC: B65D43/16
Filed: 1929-08-28
Abstract: 338,916. Denniff, A. Aug. 28, 1929. No Patent granted (Sealing fee not paid). Biscuit - boxes. - The lid of a container for biscuits &c. occupies half or more than half of the transverse perimeter of the container and is provided with inwardly directed flanges or ribs disposed on the inner faces of the top and front p o r ti o n s overlapping some of the walls of the container. Ribs e are provided on the top and front sides a, b of the lid. Ribs f, g may also be provided on the lid and on the bottom of the container respectively. Strips of rubber &c. may be disposed between the adjacent faces of the ribs and the walls of the container to ensure airtightness. The lid may be loose or it may be hinged to the top or to, the bottom of the container. The container may be circular, elliptical, polygonal or any other suitable shape in crosssection.
Patent GB-1334742-A (GB)
Title: Process for the inspection of a pipeline
IPC: G01M3/00
Filed: 1971-04-19
Abstract: 1334742 Acoustic leak detector SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 19 April 1971 [8 April 1970] 26306/71 Heading H4D A method of inspecting a pipeline includes the use of a detector sensitive to acoustic signals generated by liquid flowing through the leak which is transported through the pipe in a batch of liquid different to the preceding and following liquids which batch has a maximum viscosity of 30 centistokes and a maximum saturated vapour pressure of 10 p.s.i. The detector measures signals in the range generated by a leak and records them, artificial leaks being provided as a check. Preferred limits of viscosity and vapour pressure are 1-6 cS. and 3 p.s.i. In order to maintain the detector in its transport batch, this liquid occupies 5-30% (preferably 10%) of the pipeline under inspection. Suitable liquids are crude oils, gas or fuel oil and water.
Patent GB-374349-A (GB)
Title: Fourchette-less glove
IPC: A41D19/02
Filed: 1931-09-21
Abstract: 374,349. Gloves. JOHANSON, C. H., 605, East 40th Street, Los Angeles, U.S.A. Sept. 21, 1931, No. 26367. [Class 141.] A fourchetteless glove is made by superposing blanks which are shaped as shown in Fig. 1, or folded over in the case of a single blank as shown in Fig. 2. The blanks are cut for seaming, with the junctions at 14 and 19 between adjacent fingers, pointing towards the centre of the hand. The outer part of the thumb is cut with a lateral extension 6 so that when sewn to the inner parts the seam is towards the ball of the thumb. Taking the line a, c, b as a base, the line 22 of the index finger curves as shown and the edge 18 of the wrist turns away from the line as shown. The line 15 of the edge of the glove is at one part concentric with the line 14. The one piece blank has a hole 25 for attachment of a thumb.
Patent GB-832155-A (GB)
Title: Drive mechanism for a portable turntable
IPC: G11B19/265
Filed: 1958-08-18
Abstract: 832,155. Dictating machines; driving. SOUNDSCRIBER CORPORATION. Aug. 18, 1958 [Jan. 27, 1958], No. 26450/58. Class 40 (2). The drive means for the turntable of a disctype dictating machine comprises a motor 40 surrounded by a massive shield 41 supported by a bracket 44, a pair of resilient grommets 47 and screws 50 at one end and a similar single grommet 52 and screw 55 at the other mounting the bracket in a shock-free relation to the chassis 10. The motor drives the heavy, rubber-tyred idler wheel 55a by friction, while a smaller, rubber-tyred wheel 56a drives the knurled edge of the turntable 12. The wheels 55a, 56a are secured to a common shaft, 57a journalled in the yoke member 64, pivoted on a vertical axis 73, by means of which the wheels may be swung into engagement and held there by the action of a spring 78 or alternatively held out of engagement by the linkage controlled from the knob 27a when the machine is non- operational (Figs. 4, 8, not shown). A pin 60 attached to the shaft 57a engages the reed 61 (Fig. 4, not shown), attached to the recording arm to give audible warning of the impending end of recording space on the record.