baber/WOPTO huggingface dataset:
Patent GB-1430137-A (GB)
Title: Switching-mode power supply
IPC: G05F1/44
Filed: 1973-05-29
Abstract: 1430137 Automatic control of current or voltage INSTRUMENTATION SPECIALITIES CO 29 May 1973 [5 June 1972] 25462/73 Heading G3R [Also in Division H2] In an A.C. to D.C. converter including an A.C. switch and a rectifier, the switch is controlled so as to close at the beginning of each half cycle and open during the half cycle at a time which maintains the converter output D.C. voltage or current at a predetermined value. As shown, the converter output voltage or current, as selected by switch 150, is sensed, inverted by operational amplifier 164 and fed to comparator 30, which also receives a ramp signal from capacitor 124, the ramp being returned to zero and started again at each supply voltage zero, as sensed at diode bridge 92 by transistors 112, 120. Provided the ramp signal is less than the sensed output, transistor 64 is turned on by comparator 30 to close the A.C. switch, formed of diode bridge 46 and transistor 44, at the start of each half cycle, allowing current to pass from input transformer 20 to an output rectifying multiplier 24. When the ramp equals, or is greater than, the sensed output, transistor 64 and thus the A.C. switch are turned off, the switch being closed again at the next supply voltage zero. A variable bias from potentiometer 160 may be applied to the sensed converter output so that the A.C. switch is closed for major portions of each half cycle.
Patent GB-703266-A (GB)
Title: Improvements in or relating to electrical power transmission systems
Inventor: BROWN JAMES KINGHORN
IPC: H02P9/04
Filed: 1950-10-19
Abstract: 703,266. Transmitting mechanical power. METTROPOLITAN-VICKERS 'ELECTRICAL CO. Ltd. Oct. 18, 1951 [Oct. 19, 1950], No. 25540/50. Drawings to Specification. Class 38 (4) The Specification comprises the same subjectmatter as Specification 703,263, but the claims differ. Specifications 703,265 and 703,268, [Group XXXVII], also are referred to.
Patent GB-169704-A (GB)
Title: Improvements in or relating to the distributing mechanism of typographical composingand casting machines
IPC: B41B11/18
Filed: 1921-09-27
Abstract: 169,704. Mergenthaler Linotype Co., (Assignees of Kennedy, D. S.). Sept. 28, 1920, [Convention date]. Distributing matrices; magazines.- To enable matrices which are stored on their edges in a magazine to be separated into two founts or sets, the ears X<2> Z<2>, Fig. 4, of the two sets are located at the righthand and left-hand side of the matrices respectively. In one arrangement, t he magazine - channels are divided intc pairs by by ribs A<4> Fig. 2, and the matrices of the twc sets are delivered tc either channel of a pair by the engage ment of their ears with the pointed upper ends of intermediate ribs A<3> The magazine en trance-channels are formed by pairs of partitions D, and communicate each with two magazine-channels. In a modification, the two sets of matrices are delivered to two superposed magazines by means of a primary distributor having a short toothed rail L, Fig. 6. All matrices are released at the same point, but, according to the position of their ears, the matrices engage and pass down one. or the other of two tubes 0, N leading to different magazines. This arrangement may be used to deliver sorts matrices to different receptacles. A series of tubes 0, N may be used to distribute matrices into a pair of magazines from a single distributor-bar.
Patent GB-319132-A (GB)
Title: Improvements in or relating to apparatus for making and repairing roads
IPC: E01C23/00
Filed: 1928-09-07
Abstract: 319,132. Watson, R. A. Sept. 7, 1928. Tanks for tar and the like; surface treatment with liquid materials.-A drum n of tar emulsion is received within an airtight container a having means, such as hand-operated prongs u, for piercing the drum to allow the emulsion to escape into the container for withdrawal as required, unaffected by exposure to the air. The container shown, which has a removable airtight cover g, is mounted on trunnions e on a vehicle frame which also supports a sand bin c and a tool-box d, the whole forming a compact road-repair outfit. Before withdrawal of the emulsion through a cock (not shown), the container is rocked on its trunnions to agitate the contents.
Patent GB-838727-A (GB)
Title: Method of bonding fibres
IPC: D04H1/64
Filed: 1957-08-14
Abstract: 838,727. Agglutinated fibrous materials. SCHICKEDANZ, G., [trading as VEREINIGTE PAPIERWERKE SCHICKEDANZ & CO.]. Aug. 14, 1957 [Sept. 18, 1956], No. 25688/57. Class 140. A method of making bonded fibrous material such as sheets comprises treating a mass of fibres with an aqueous bonding solution containing urea or a derivative thereof, formaldehyde and methyl cellulose and thereupon drying and subsequently heating the treated fibre mass to effect condensation of the binder. Examples disclose bonding solutions comprising (a) methyl cellulose, urea-formaldehyde condensate and glycerine dissolved in water; (b) methyl cellulose and melamine-formaldehyde condensate dissolved in water. The bonding solution is sprayed on to a cellulose fibre fleece, which is thereafter dried and heated.
Patent GB-1537177-A (GB)
Title: Cutting insert configuration
IPC: B23C5/20
Filed: 1977-06-21
Abstract: 1537177 Cutting tools KENNAMETAL Inc 21 June 1977 [29 June 1976] 25782/77 Heading B3B A cutting insert 14 for mounting, e.g. in a milling cutter body, comprises a regular polygonal body having parallel faces 24 and peripheral walls 30, 32, 34, 36 which form cutting edges at the juncture of the walls and faces, each wall having a plurality of grooves 22 extending perpendicular to said faces and dividing each cutting edge into discrete portions, the grooves being different in number on any two cutting edges so that each insert in said milling cutter body can be indexed to a position so that the un-machined ridges left by the grooves on one insert are removed by the discrete portions of the cutting edge of the following insert. As described the grooves are on two of the cutting edges 30, 32, and four grooves are on the cutting edges 34, 36 so that grooves and discrete portions are staggered when considering said edges in a superimposed relationship.
Patent GB-389399-A (GB)
Title: An improved kinematographic picture projecting and exhibiting apparatus for endless films and the like
IPC: G03B21/32
Filed: 1932-09-16
Abstract: 389,399. Coin-freed kinematograph apparatus. KLœSSENDORF, H., 6, Am Wald, Brieselang, Osthavelland, Germany. Sept. 16, 1932, No. 25847. Convention date, Nov. 26, 1931. [Class 27.] Kinematograph apparatus comprising an endless film wound on rollers, and housed in a casing together with a projection screen viewed through a sight opening, is set in operation by coin action and stopped by film action. Coin-action, weight.-A coin inserted through a slit in the casing falls through a channel 15 to a coin box, and turns a lever 18 so that a spring contact 19 carried by it temporarily engages a fixed contact 20 to complete a circuit I energizing an electromagnet 21. The armature 22 then rocks about a pivot 54, and a pawl 56 on an arm 55 secured to it engages a ratchet wheel to turn the wheel and a cruciform member 58 through 90‹. This movement rocks . a mercury switch 23 about a pivot 59 and completes the circuit II of the motor. The circuit continues completed until a cut portion of the margin of the film permits a narrow roller 25 to contact with a film roller 24 and temporarily complete a circuit III to energize the magnet 21 again. The consequent armature movement causes the member 58 to move through a further 90‹ and permit the switch 23 to fall to the position shown, thus breaking the motor circuit. The momentum of the parts carries the cut portion of the film margin from between the rollers 24, 25. Returning coin coin-slit closing-devices.-In the event of breakage of the film, or of shortening of a film loop, a weighted lever on a shaft 32 is released so as to turn the shaft. The shaft carries fibre rings 39 provided with conducting strips 40 which normally bridge contacts 41 in the various circuits, and the turning of the shaft 32 breaks all the circuits. The tail end of the weighted lever also releases a coin which falls into a cup accessible from outside the casing, and moves a slide to cover the coin slit.
Patent GB-359632-A (GB)
Title: Improvements in and relating to internal combustion engines
IPC: F01P11/20
Filed: 1930-08-30
Abstract: 359,632. Heating lubricating oil. CRAVEN, F. DE T., 44, West 75th Street, New York, U.S.A. Aug. 30, 1930, No. 25997. [Class 12 (iii).] The lubricating oil of an internal-combustion engine is warmed, starting thus being facilitated, by circulating heated water through or around the sump or other part of the lubricating system; in a water-cooled engine, Fig. 1, the cooling water itself may be used as the heating medium. Water from the cooling jacket 5 is circulated through a pipe 4, passing through the sump 6 by an electric heater 7, comprising heating unit 29, Fig. 3, surrounded by a perforated tube and controlled by a thermal switch 11. In an air-cooled engine the tube 4 leads from a water tank containing the heater 7. The Provisional Specification states that the electric heater may be located in the lubricating oil itself.
Patent GB-188478-A (GB)
Title: Improvements in machines for tearing fabrics
IPC: D01G11/04
Filed: 1921-10-03
Abstract: 188,478. Frier, J. D. Oct. 3, 1921. Severing by tearing.-In a machine for tearing fabrics longitudinally, applicable for the production of strips for handkerchiefs &c., the fabric is led from a pile 1<a> on a bar 2 or from a roller 33 past guide and tensioning rollers 4, 5, 6 and through a slot s between transverse plates 7, 8 where it is torn. One strip is led to a winding roller 12 and the other to a roller 16 on opposite sides of the machine. After leaving the slot s, the strips are led over guide rollers 9, 13 and then under rollers 10, 14 on the ends of a rocking frame, so that, if one of the rollers 12, 16 takes up quicker than the other the frame tilts. The spindle 10<a> of the roller 10 in its extreme positions actuates levers 19, 24 to trip a rod 22, connected to a spring urged fork rod 30 of a loose pulley countershaft mechanism, and thereby stop the machine. The tilting of the frame may be used to sound a warning bell.
Patent GB-485854-A (GB)
Title: Improvements in or relating to thermionic amplifying systems
IPC: H03F1/36
Filed: 1936-09-25
Abstract: 485,854. Valve circuits for wireless reception. STANDARD TELEPHONES & CABLES, Ltd., BLACK, D. H., and LAWRENCE, W. Sept. 25, 1936, No. 26067. [Class 40 (v)] A.V.C. in a thermionic amplifier is produced by applying a gain control potential to the grid of a valve the internal impedance of which is common to the output and input circuits of the amplifier and produces a negative feed-back effect. In one embodiment, Fig. 1, feed-back voltages are derived from the junction of a resistance R and the triode portion of a double valve V1, which are connected across the pentode amplifying portion, the impedance of the triode being varied by an A.V.C. voltage applied to its grid. In another embodiment, Fig. 3, a triode V2 forms part of the common cathode impedance of an amplifier valve V1, and is shunted by an inductance L of high impedance to radio signals but of low impedance to the steady bias potential developed across resistance R. In a modification, Fig. 4 (not shown), the " oscillator " portion of a heptode is used as the feed-back triode in the " cathode " circuit of the signal amplifying portion. The amount of negative feed-back in a low-frequency amplifier may be simultaneously controlled. Specification 467,430 is referred to.
Patent GB-1167410-A (GB)
Title: Devices for Reading the Graduations of Precision Rulers
IPC: G01B11/02
Filed: 1967-06-06
Abstract: 1,167,410. Photo-electric measuring microscopes. SOC. GENEVOISE D'INSTRUMENTS DE PHYSIQUE. June 6, 1967 [Aug.25, 1966], No.26113/67. Heading G1A. [Also in Division G4] A photo-electric microscope for measuring the position of a precision ruler comprises means for scanning the ruler to generate a series of pulses, said means including an optical system having a field diaphragm comprising a helical slot in a cylindrical member located in a plane conjugate with the ruler and displacable between positions corresponding to different marks on the ruler. An image of the ruler 4 is formed on the field diaphragm 16 by a lens 7 and is oscilated relative thereto by a mirror 9. When the image of a mark on the ruler coincides with the helical slot 17, the cell 12 receiving light reflected by mirror 11 emits a pulse. The phase of this pulse is compared with a reference phase from generator 10 and the difference displayed on a meter 15. The position of ruler 4 is measured by turning knob 23 and hence the diaphragm 16 until the meter reads zero and reading of the position of the diaphragm on a scale 20. The pitch of the helix 17 is equal to the spacing between marks on the ruler multiplied by the magnification of the optical system. The ruler may be coupled to one of pair of caliper jaws, Fig.2, (not shown). In this case there is a mechanical connection between the ruler and the field diaphragm and the photo-electric system corrects for backlash &c. in the mechanical system. The scale 20 is replaced by a disc carrying 10, 000 circumferentially spaced marks which are detected photo-electrically to operate a reversible counter. In another embodiment, Fig.3, the oscillating mirror is omitted and the diaphragm 16 is rotated continuously by a motor 61 to scan the image of the ruler 4. The position of a mark on the ruler relative to a reference position is indicated by a counter 65 which is reset and started by a pulse from photo-cell 70 when the shaft is in a position corresponding to the reference position and counts pulses from a photo-cell 76 generated by 10, 000 marks aranged around the disc 66 until stopped by the pulse from photo-cell 12 when the ruler mark coincides with the helix 17. A coarse position indicator comprising a photoelectric pulse generator mechanically coupled to the ruler may be provided, Fig.4, (not shown). The phase of the pulses produced, which is indicative of the coarse position of the ruler controls the application of pulses from photo-cell 70 to a coarse counter. Logic circuitry may be provided, Fig. 5, (not shown) whereby the fine counter is fed during alternate revolutions of disc 66, the count being held during the other revolutions to provide a readable indication.
Patent GB-444004-A (GB)
Title: Improvements in processes for influencing the chemical and physical character of blast furnace slags
IPC: C21B5/04
Filed: 1935-09-20
Abstract: 444,004. Blast furnaces. ROLL, J., 11, Kronstrasse, Hamborn, Bruckhausen, Germany. Sept. 20, 1935, No. 26129. [Class 51 (ii)] [See also Group V] The chemical and physical properties of blast furnace slag are influenced by blowing silica, e.g. fine dried sand, into the hearth casing of the blast furnace below the plane passing through the twyers. As shown, sand is blown in through a nozzle 2 situated below the plane I-I passing through the twyers 4. Slag is run out through a tap hole 5.
Patent GB-532652-A (GB)
Title: Improvements in honing or lapping machines
IPC: B24B33/02
Filed: 1939-09-19
Abstract: 532,652. Honing and lapping cylinders. BURGESS, A. F. (Barnes Drill Co.). Sept. 19, 1939, No. 26142. [Class 60] A honing or lapping machine, e.g. as described in Specification 532,651 in which liquid coolant carries waste material into a settling tank 65 is provided with an endless chain scraper 68 to remove deposit from the bottom of the tank and discharge it into a removable receptacle. Cooling oil is delivered from a tank 52 by a pump 51 through a filter F and pipe 53 to the work 14 and waste oil flows over a tray 55 and through a notch 56 into the tank 65 whence the settled oil flows by an overflow 58 into the tank 52. The chain 68 may be tensioned by a screw 77, Fig. 4, and rotated by a ratchet 83 operated by a spring- returned piston 85. The cylinder 84 is connected to the hydraulic operating system in such a way that the piston is moved at the beginning of each cycle of operations or at each working stroke.
Patent GB-874231-A (GB)
Title: Improvements in electrical control systems
IPC: G05D23/22
Filed: 1957-08-20
Abstract: 874,231. Automatic temperature-control systems. SANGAMO WESTON Ltd. Aug. 20, 1957 [Aug. 21, 1956], No. 26297/57. Drawings to Specification. Addition to 750,898. Class 38 (4). The control system described in the parent Specification is modified by replacing the pair of biased diodes in Fig. 1 thereof by a pair of Zener diodes connected in series so that until their breakdown voltage is reached no negative feedback takes place.
Patent GB-533086-A (GB)
Title: Process for the production of synthesis gas with the simultaneous recovery of tar oils and valuable hydrocarbons
IPC: C10B49/00
Filed: 1939-09-21
Abstract: 533,086. Carbonizing process and apparatus. WOODALL - DUCKHAM (1920), Ltd. (Didier- Werke Akt.-Ges.). Sept. 21, 1939, No. 26302. [Class 55 (i)] In the production of synthesis gas (carbon monoxide and hydrogen) from solid fuels with the simultaneous recovery of valuable hydrocarbons in continuously operated, externally heated vertical retorts, as described in Specification 461,402, in which the fuel passes in turn through a preheating zone I, a carbonizing zone II, a conversion zone III, and a water gas zone IV, the gas from the carbonizing zone is led away at 6 through recovery plant T for removal of tars and certain hydrocarbons, and the remaining gas is returned at 7 to the conversion zone. Gas outlets 3 are provided at various levels in the pre-treatment zone, and a gas outlet 5 for the synthesis gas is provided at the bottom of the conversion zone down which pass the gases from the recovery plant, part of these gases being supplied at 8 to the bottom of the water gas zone, and passing upwards in counterflow to the fuel. The condensate water from the recovery plant 7 may be returned as water vapour to the retort together with the gas. The gas is withdrawn from the carbonizing zone at a temperature of between 550‹ and 650‹C.
Patent GB-360554-A (GB)
Title: Improvements in method of and means for operating internal combustion oil engines
IPC: F02B1/00
Filed: 1930-09-04
Abstract: 360,554. Oil engines. HESSELMAN, K. J. E., Saltsj÷-Storõngen, Sweden. Sept. 4, 1930, No. 26393. Convention date, Sept. 14, 1929. Addition to 282,731, [Class 7 (iii), Internal-combustion engines, Carburetting apparatus &c. for]. [Class 7 (iii).] Instead of injecting fuel into a combustion chamber along the chord of an arc by a nozzle located near the periphery of the combustion chamber as described in the parent Specification, the fuel is injected in one or more directions through a fuel nozzle which is coaxial with the combustion chamber. Fuel is delivered to a nozzle 4 by a cam actuated pump 10 having an adjustable stop 11 for limiting the stroke of the plunger 12, and a relief valve 13. The air inlet valve 5 carries a shield 7 which causes the air to rotate as it enters the cylinder. An igniter 9 is so disposed that before it is reached by the fuel sufficient air has been mixed with the fuel to make it ignitable.
Patent GB-400402-A (GB)
Title: Improvements in and relating to swaging hammers
IPC: B21J7/34
Filed: 1932-09-22
Abstract: 400,402. Power hammers. BECHE & GROHS GES., H³ckeswagen, Rhineland, Germany. Sept. 22, 1932, No. 26409. Convention date, March 4. [Class 83 (iv).] An elastic-fluid-operated hammer with two vertically moving die heads working against one another has one head only directly actuated by the fluid and the other head is mechanically coupled to it. As shown in Fig. 1, the head 1 is actuated by the ram 4 working in the cylinder 5 and is coupled by ropes and pulleys 7, 14 to the other head 2. If the lower head 2 is to have a slower movement than the head 1 pulleys 8, 9 of different diameters are employed and the head 2 is made larger than the head 1 so that the impact energy of the two heads is the same. The area of the piston 6 effective for raising the head 1 is such that the fluid pressure alone cannot raise it so that if the lower head remains suspended it is not possible for the head 1 to rise and then fall and strike the slack ropes. The ropes are connected to the heads by spring buffers 11. In the modification shown in Fig. 4, the heads are coupled by rods 27, 28 and levers 29.
Patent GB-161125-A (GB)
Title: A new or improved combination article of wearing apparel
IPC: A41D23/00
Filed: 1920-09-15
Abstract: 161,125. Casajuana, R., (Juvina, Hijos de J.). Sept. 15, 1920. Mufflers &c.-A neckband or wrap 1 made of woollen fabric &c. is furnished with a number of button and buttonhole or other fastenings, and is adapted to be worn in a variety of ways, two of which are shown in Figs. 2 and 3.
Patent GB-493663-A (GB)
Title: Improvements in impulse senders of the type used in telephone systems
IPC: H04M1/38
Filed: 1937-09-30
Abstract: 493,663. Impulse transmitters. GENERAL ELECTRIC CO., Ltd., and ROSE, W. R. Sept. 30, 1937, No. 26443. [Class 40 (iv)] An impulse transmitter comprising a ratchet wheel 4 which is rotated by a pawl 6 whenever a key such as 2 is depressed, e.g. as described in Specification 351,602, is provided with a cam 15 which is pushed along by the pawl until it abuts against a stop 14. The pawl is then firmly held against the ratchet and overshooting is avoided. The stop 14 is stepped so that the pawl and the ratchet can be stopped at different positions depending on the particular key depressed. The stop 14 is rotated about a pivot 19 by a lever 12 operated by cams 9 on the keys. The cam 9 may only be fitted to the keys for digits 7-0 as the pawl travel for the other digits may be insufficient to cause overshooting.
Patent GB-892791-A (GB)
Title: Improvements in apparatus for false-twisting yarns
Inventor: SCRAGG FREDERICK
IPC: D02G1/08
Filed: 1959-08-01
Abstract: 892,791. Twist tubes. SCRAGG & SONS Ltd., ERNEST. July 29, 1960 [Aug. 1, 1959], No. 26490/59. Drawings to Specification. Class 120(2) In false-twisting apparatus comprising means for moving a yarn along a predetermined path and endless belts presenting at least two surfaces which frictionally engage the yarn on opposite sides of such path to impart rotation thereto, e.g. as described in Specification 821,460, each belt is driven at different speeds at two positions, one each side of the yarn contacting locus of the belt, whereby the belt is tensioned on its run past the yarn, the tension being relieved on the return run of the belt. The belts may comprise two sets adjustably interlaced at the yarn contacting loci to permit adjustment of the twist imparted to the yarn.