baber/WOPTO huggingface dataset:
Patent GB-1292212-A (GB)
Title: Improvements in recovery system from short circuits through switching devices in power circuits
IPC: H02M1/00
Filed: 1970-01-13
Abstract: 1292212 Protecting converters GENERAL ELECTRIC CO 13 Jan 1970 [16 Jan 1969] 1589/70 Heading H2F In a converter comprising a series arrangement of two alternately conductive thyristors 18, 20 connected across supply lines 14<SP>1</SP>, 15, a series impedance 33b and shunt capacitance 34 are connected to the supply lines so that if thyristors 18, 20 become simultaneously conductive (shoot-through) capacitor 34 will ring with the circuit inductance 19 so as to turn off both thyristors 18, 20. The circuit also provides means for monitoring the voltage across the supply lines 14<SP>1</SP>, 15 and current through impedance 33b so as to disable the power supply if both thyristors 18, 20 remain conductive. As described, the conduction angle of thyristors 58, 59 is controlled by variable resistor 73 and unijunction transistor 68 so as to vary the D.C. supply to lines 14<SP>1</SP>, 15 feeding an inverter comprising a bridge of thyristors 18 ... 23. Shootthrough of either series pair of thyristors 18, 20; 21, 23 should result in capacitor 34 ringing with the commutating inductors 19 or 22 so as to turn off the short-circuiting thyristors. The voltage across supply lines 14<SP>1</SP>, 15 is monitored across a Zener diode 43 by means of a differential amplifier 45 which compares it with the voltage across resistor 33b. If the short-circuit conditions maintain, capacitor 57 will charge sufficiently to trigger unijunction transistor 52 which feeds a pulse via transformer 54p, 54s to turn on transistor 76 which prevents capacitor 74 charging and so prevents triggering of the controlled rectifiers 58, 59. Resistor 33b may be replaced by an inductor having a coupling winding. The electrostatic load 32 may be a precipitator or a particle-coating process. In Fig. 3 (not shown) the differential amplifier 45 is replaced by a relay winding connected across Zener diode 43 which energizes a further relay connected across resistor 33b which, in turn, disables the rectifiers 58, 59.
Patent GB-690229-A (GB)
Title: Improvements in and relating to the packaging of granular, liquid or other commodities
IPC: B65B9/213
Filed: 1950-01-20
Abstract: 690,229. Packaging. COMMUNICATIONS PATENTS, Ltd., BAZIN, R. E., and YOULE, F. April 19, 1951 [Jan. 20, 1950], No. 1604/50. Class 94(i) A method of packaging a granular, liquid or other commodity comprises the steps of passing a portion only of a length of thermoplastic material in strip form to a folding means to produce a tubular formation with overlapping edges, sealing said edges by dielectric welding to produce a tube, sealing one end of this tube by dielectric welding to produce a tubularcontainer which is sealed at one end, introducing such commodity into said container, sealing the other end of said container by dielectric welding and repeating such steps in respect of another portion of the length of material in order to produce a succession of commodity-loaded packages. A strip 6 of polyvinyl chloride is fed down between inner and outer tubular members 1, 2 which form the strip into a tube which is sealed longitudinally by a bar 8 to which and the inner tubular member 1 is applied a highfrequency electric -field to seal the strip by dielectric heating. The leading end of the tube of wrapping material thus produced is closed by cooperating transverse dielectric heating elements 11, 12. The tube of wrapping material is then moved down a suitable amount and a commodity fed thereto from a pipe 15, through the inner tubular member 1. The transverse sealing of. a succeeding container or pocket by the elements 11, 12 serves at the same time to close the first, filled, container which may be severed from the strip by knife blades 17. Alternatively, the strip between consecutive containers may be weakened, for example by perforations. According to the Provisional Specification the shape of the container may be such that its lower end terminates in a point or has a small cross-sectional area, in which cases the longitudinal seam may effect complete closure of the container without the necessity of transverse welds.
Patent GB-547005-A (GB)
Title: Improvement in or relating to the manufacture of metallic salts
IPC: C01G49/10
Filed: 1941-02-07
Abstract: 547,005. Ferric chloride. BURRAGE. L. J., BRUNDRIT. D.. and IMPERIAL CHEMICAL INDUSTRIES. Ltd Feb. 7, 1941, No. 1650. [Class 1 (iii)] Anhydrous ferric chloride is prepared by reacting chlorine with a fused salt bath containing iron salts, mainly in the form of ferrous chloride, at a temperature at which ferric chloride is formed and volatilized and simultaneously or subsequently regenerating the ferrous chloride bath 'by reacting the ferric chloride medium formed with metallic iron. The ferric chloride is condensed from vapours containing excess chlorine. Alkali or alkaline earth chlorides may be present in the bath, whereby the retention of sufficient iron chloride in the bath is ensured, probably by formation of double salts. In a suitable apparatus for carrying out the process the reaction vessel 1, connected to a condenser 4, is divided by a vertical partition 9 having apertures 10, 11, and has pipes 12, 13 for the introduction of chlorine and an opening 16 for introduction of iron. In operation a mixture of sodium and calcium chlorides is introduced into the heated vessel, chlorine is passed in through the tube 13 and iron added through the opening 16, until a sufficient level of the bath containing fused ferrous chloride is obtained. The supply of chlorine through pipe 13 is then stopped and chlorine is passed in through pipe 12 with the production of ferric chloride, part of which is volatilized and passed to condenser 4. The residue probably in combination with sodium chloride is carried by circulation of the bath induced by the passage of the chlorine and as shown by the arrow through opening 11 to the other side of the partition and there takes up more iron to form ferrous chloride which returns through the opening 10 to react with further chlorine.
Patent GB-1026842-A (GB)
Title: Method and apparatus for pressurising a sterilizing chamber
IPC: A61L2/07
Filed: 1963-01-14
Abstract: A steam sterilizer comprises (a) a vessel 10 defining a pressurisable chamber consisting of a cylindrical shell 12 back and front plates 18 and 20, and a slidable drawer having an end plate 28 which closes the opening in front plate 20 (b) means for introducing steam under pressure into inlet 46 and (c) outlet 48 which is of smaller size than inlet 46 and in direct communication between the chamber and atmosphere.  Steam pressure is built up by the difference in inlet and outlet size and is therefore reduced to atmospheric pressure by merely discontinuing steam introduction.
Patent GB-251939-A (GB)
Title: Improvements relating to regulating mechanism for sliding windows
IPC: E05F11/38
Filed: 1926-01-20
Abstract: 251,939. Perfect Window Regulator Corporation. May 11, 1925, [Convention date]. Window opening and closing apparatus. - The sash 4 is operated by a lever 13 pivoted thereto centrally and guided by two fixed pins engaging a longitudinal slot 14 and an elliptical slot 10 in a bracket 11 riveted to the lever. The lever is actuated by a pinion 9 and handle 8, the pinion being engaged with a shaped rack secured to the slotted bracket 11. The shaft of the pinion and handle has a reduced end maintained in engagement with the guide slot 10 by a headed screw in the end of the shaft.
Patent GB-951426-A (GB)
Title: A hydrocarbon polymer with a filler therein
IPC: C08K3/36
Filed: 1962-01-17
Abstract: A hydrocarbon polymer or a monomer therefor has incorporated therein both an unsaturated organic silane ester and silica of particle size exceeding 5 microns (and in the case of the monomer polymerizing) and then curing the polymer mixture.  The starting material may be a liquid polyolefin e.g. those from butadiene, isoprene, dimethyl butadiene, piperylene, hexadiene, and methyl pentadiene with or without styrene, alkyl ring-substituted styrenes, acrylo-nitrile and methyl vinyl ketone, this liquid polyolefin may be used in conjunction with a monomer e.g. styrene, the vinyl toluenes, the dimethyl styrenes, the halogenated styrenes, acrylic and methacrylic acid esters, alkyl fumarates, allyl esters, vinyl esters, divinyl benzene, and diisopropyl benzene.  The starting material may also be styrene, or styrene substituted in the ring by halogen or alkyl groups containing not more than 18 carbon atoms-in this case the mix may contain 75 to 99 parts of the styrene compound and at least 0.5 parts of a compound containing two or more vinyl groups attached to an aromatic nucleus such as benzene, naphthalene, biphenyl and phenanthrene, the aromatic nucleus also containing hydrogen, halogen or alkyl.  Specified examples are divinyl-benzene, toluene-xylene or -naphthalene, trivinyl benzene. In a further alternative the polymer present may be polymer of an olefin e.g. polyethylene, and polypropylene.  Also present may be catalysts especially peroxides both for the monomer polymer atom and for the curing.
Patent GB-174853-A (GB)
Title: Improvements in or relating to steam generator furnaces
IPC: F23H3/02
Filed: 1921-01-11
Abstract: 174,853. Ford, A. Jan. 11, 1921. Fire-bars and grates; air supply, regulating; fire-bridges.-In grates having a series of transverse bars with openings constituting longitudinal passages for the supply of air or steam, a damper is provided to move vertically in a recess in one of the fire-bars in order to reduce the effective area of the grate. The damper d moves in the vertical recess b<3> in one of the bars b and is regulable from the front of the furnace by means of a lever e and a rod f. At the rear of the grate is a hollow chamber g extending across the grate, and having an inclined top g' which is provided with openings g<2>, preferably formed between bars h. The air or steam passages of the grate communicate with the chamber g by means of pipes i. Ash collected in the air passages is blown out through an opening l, closed by a plate m which is operated by a rod n.
Patent GB-1161964-A (GB)
Title: Improvements in or relating to Fluid Operated Function Generators
IPC: F15C1/14
Filed: 1968-01-11
Abstract: 1,161,964. Pure fluid amplifier. HONEYWELL Inc. Jan.11, 1968 [Jan.12, 1967], No.1758/68. Heading G3H. In a pure fluid device, control signals applied to parts 3, 4 deflect a power jet issuing from nozzle 2 along a deformable splitter edge formed by the adjustable ends 12-16 of blades 6-10, the arrangement being such that the signals at outputs 24, 25 vary as a function of the input signals and the adjusted shape of the splitter. As shown the splitter is set to produce a sinusoidal function, but adjustment of the blades to produce a V-shaped leading edge would provide a linear output signal in response to a linear input signal.
Patent GB-211315-A (GB)
Title: Improvements in folding machines for paper and the like
IPC: B65B25/14
Filed: 1923-01-19
Abstract: 211,315. Drever, R. T. Jan. 19, 1023. Folding paper.-Folding-apparatus, of the kind comprising a pair of oppositely rotating rollers between which the sheet is drawn and folded and passed along a guide to a buckling-stop by which it is directed between a third roller and one of the rollers of the first pair so as to receive a second fold, is combined with an inclined table down which the twice folded sheet slides by gravity to a position opposite a stationary element or blade, the inclined table being then moved so that the stationary blade enters a slot therein and conveys the sheet between another pair of rollers to receive a further fold. The pile of sheets x is supported on a table a pivoted at a<1> and engaged by an arm c on a pivoted lever c<2> influenced by a spring c<3> to maintain the top sheet in contact with the first folding-rollers b, b<1>, the pile table being lowered intermittently by an arm k<4> on the operating handle k<2> engaging a cam k<3>. The sheet, which receives a first fold between the rollers b, b<1>, passes along a guide d until it reaches a stop d<1>, whereupon the sheet is buckled and drawn into the rollers e, b, and receives a second fold. The sheet slides down a sloping board f until it reaches a stop f<3>, the board f being then swung down into the dotted line position to cause a fixed blade g to push the sheet through a slot g<1> in the board and through a perforated shield g' on the board into another pair of folding-rollers h, h', which give the sheet a third fold. Another guide h<2> and stop h<3>, and a third roller i coacting with the roller h, fold the sheet a fourth time. The rollers b, h are driven by a chain k from a sprocket k<1> and the other rollers by frictional contact therewith. The sloping board f may be fitted with a light spring clip f<2> engaging one side of the sheet to turn it through a right or other angle when the last two folds are required to be transverse or at an angle to the first two folds. By setting the stops at the required angle all the folds may be made at any angle desired.
Patent GB-752351-A (GB)
Title: Improvements in and relating to stands of rolls
IPC: B21B13/14
Filed: 1954-01-21
Abstract: 752,351. Rolling. SCHLOEMANN AKT.- GES. Jan. 21, 1954 [Jan. 21, 1953], No. 1812/54. Class 83 (4). In a multi-roll stand the two working rolls 16, Fig. 6, are frictionally driven by backing rolls 17 and are located in position by auxiliary supporting rolls 19 mounted at the side or by being offset out of the plane of the backing rolls or both. Rows of auxiliary rolls 19 are carried on beams 18 mounted on the vertically adjustable bearing chocks 26, Fig. 7, of the backing rolls 17. A wedge 36 and clamp 37 permit adjustment of the beam 18 relative to the other rolls. The working rolls 16 are held in permanent engagement with the other rolls by spring- loaded plungers 32 which engage bearings 28 at each end of the working rolls 16. Bearing plates 30 on hinged mountings 31 attached to the stands 27 hold the working rolls 16 in the axial direction. In a modification intermediate rolls 41, Fig. 10, are inserted between the working rolls 39 and the auxiliary rolls 42 which are in rolling contact with the backing rolls 38. The auxiliary rolls 42 are mounted on vertically slidable bearings 43 which are urged towards the backing rolls by spring plungers 45 through cranks 49 and connecting rods 50. The rolls 41 may be of softer material than the other rolls to prevent marking paths and to pick up splinters of material.
Patent GB-574312-A (GB)
Title: Improvements in or relating to automatic switches for use in telephone or like systems
IPC: H04Q3/00
Filed: 1944-02-01
Abstract: 574,312. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., TAYLOR, R., and BAKER, G. T. Feb. 1, 1944, No. 1825. [Class 40 (iv)] In a subscriber's line switch of the homing type, on an outgoing call potential is applied to the guarding conductor leading to the final selector multiple through the cut-off relay, which is of low resistance, and a wiper of the switch in off-normal position, so that the relay may be released by the application of the same potential from a final selector extending a toll call. The operation of line relay L starts hunting in the usual manner, and cut-off relay K pulls up in series with the magnet DM when an idle outlet is found. After the relapse of relay L, the holding ground fed back from the seized selector is extended through relay K and over wiper D2 to the incoming test wire. If now direct ground is applied to this wire from a toll final selector, relay K is shortcircuited, the existing connection is opened and the switch restores to normal, whereupon circuits are made for both relays K, L, but K operates first and disconnects L. If the subscriber is the called party in an existing connection, the breakdown ground will maintain relay K and force down the switching relay in the final selector. Relay K may be shunted by a condenser to pass the toll tone that is usually provided on toll calls. The common battery (or ground) lead 10 to the line relays may include a key LDK which serves to disable non-priority subscribers as regards outgoing calls during overload conditions. On long lines the release lag of relay L may be reduced to provide greater winding space and therefore it is arranged that holding ground is fed back from the first selector immediately upon operation of the line relay. A selector is described that is otherwise similar to that disclosed in Specification 447,767.
Patent GB-553450-A (GB)
Title: Improvements in or relating to the wing floats of flying boats and seaplanes
IPC: B64C35/00
Filed: 1942-02-11
Abstract: 553,450. Aircraft launching and alighting. SHORT BROS., (ROCHESTER & BEDFORD), Ltd., and SMITH, L. Feb. 11, 1942, Nos. 1873 and 11405. [Class 4] Wing floats for flying boats are provided with a hydrofoil which is adapted to be lowered from a recess in the float to an operative position below the float. According to Fig. 1, the hydrofoil C is carried by links D, D' pivoted at D<SP>2</SP>, D<SP>3</SP> in the float A and can be lowered from a recess A<SP>1</SP> in which it leaves the streamline form of the float unbroken, to the operative position shown, by an electromotor g and worm gearing G<SP>1</SP>. The lengths of the links and the position of the pivots D<SP>2</SP>, D3 are chosen to determine the desired operative angle of the hydrofoil. The distance of the hydrofoil in the operative position from the bottom of the float at about the length of its chord and from the nose of the float about three-fifths of the length of the float. The float bottom and the be operated by screwed-shafts Dt, Dt engaged oy pinion nuts Dt<SP>1</SP> Dtt driven by chains Dtt. The number of the teeth on the front pinions may differ from those on the rear pinions or the pitch of the screwthread of the front pinion and shaft may differ from that of the rear pinion and shaft whereby the leading edge of the hydrofoil is lowered to a greater or less extent than the rear edge, the angle of attack of the hydrofoil being thus determined. According to Fig. 9 the hydrofoil comprises hinged section C<SP>1</SP>, C<SP>2</SP> and the screwed-shafts Dt, Dt are inclined whereby the di-hedral angle is increased as the hydrofoil is lowered. Specification 22407/11, [Class 4], is referred to. According to the second Provisional Specification two hydrofoils in tandem may be arranged beneath each float.
Patent GB-140157-A (GB)
Title: Improvements in or relating to carpet sweepers and the like
IPC: A47L11/33
Filed: 1919-01-25
Abstract: 140,157. Roth, C. H. Jan. 25, 1919. Carpet-sweepers.-In a carpet-sweeper &c., the dust-trays 7 constitute the resilient supporting- means for the body 1 and are secured by one edge to a wheel axle 5 and by the opposite edge to the body. The body is provided with a lid 2 for emptying the trays. The handle may be retained in the upright position by spring washers interposed at the pivots between the bail and the body, or by a spring bracket at each end of the body.
Patent GB-432037-A (GB)
Title: Improvements in or relating to the securing of heels to boots or shoes
IPC: A43D86/00
Filed: 1934-01-19
Abstract: 432,037. Wood-screws. UNITED SHOE MACHINERY CORPORATION, 140, Federal Street, Boston, U.S.A.-(Assignees of Parker, M. W.; 247, Queen's Parade, Clifton Hill, Victoria, Australia) Jan. 19, 1934, No. 1902. Convention date, Jan. 20, 1933. [Class 89 (ii)] [See also Group VII] To enable a further operation to be performed on a shoe immediately a heel temporarily secured by adhesive has been clamped to the shoe, a fastener is used to clamp the parts together which fastener has an extension 26 adapted to enter a socket 28 such as that of a jack post 30. The fastener has a screw 16 forming a heel engaging portion, and an integral polygonal portion 24 enabling the fastener to be turned by a wrench, which portion 24 abuts against the last.
Patent GB-264874-A (GB)
Title: Improvements in and relating to the control of electric motors
IPC: H02P7/34
Filed: 1927-01-22
Abstract: 264,874. British Thomson-Houston Co., Ltd., (Assignees of Whiting, M. A., and Harrington, E. D.). Jan. 22, 1926, [Convention date]. Systems for continuous-current motors only. In a Ward Leonard control system for the operation of lifts or other purposes, the rate of change of generator field strength during period of great acceleration or deceleration automatically cuts resistance out of the motor field or puts it into the generator field in order to stabilize the working. According to the arrangement shown in the Figure the variable field 12 of the generator G is provided with an adjustable secondary winding 17 capable of energizing a relay 15 which, under a sufficiently high rate of change, short-circuits resistance 16 thus strengthening the field 10 of the mntor M. In a modification a similar secondary coil and relay opens a normal short-circuit round a resistance in the generator field. Both actions may be combined in one arrangement.
Patent GB-1385052-A (GB)
Title: Device for adjusting the ignition phase of an internal combustion  engine
IPC: F02D37/02
Filed: 1972-01-17
Abstract: 1385052 Ignition timing for I C engines ALFA ROMEO SpA 17 Jan 1972 [18 Jan 1971] 2246/72 Heading F1B A reciprocating I.C. engine comprises an electrical or electronic ignition system including a distributer with a plate mounted for rotational movement to alter the ignition timing, a three dimensional cam 40 and a follower 60 which are relatively movable to allow the instantaneous point of contact of the follower on the cam surface to move in two directions at right angles to each other and to the direction of guided movement of the follower, which is connected to the plate to adjust its angular position. Relative movement in one of said two directions is caused by movements of the throttle control 82 and relative movement in the other of said two directions is caused by engine speed responsive means 52-59, 85-87. The cam 40 is mounted on hollow shaft 46 for rotation by a pulley 42 in response to throttle control 82 and the axial position of the cam is determined by the pressure difference across a coolant pump 85 driven by the engine. In another embodiment, Fig. 3 (not shown) a cam (110) has two surfaces (111) and (112) which respectively control fuel injection and ignition timing.
Patent GB-844994-A (GB)
Title: Improvements in or relating to collapsible three legged stands for transportable apparatus
IPC: A47B13/06
Filed: 1959-01-21
Abstract: 844,994. Stands. PHILIPS ELECTRICAL INDUSTRIES Ltd. Jan. 21, 1959 [Jan. 24, 1958], No. 2247/59. Classes 52(2) and 52(3) A collapsible stand to support electrical or optical apparatus such as a loudspeaker 5, searchlight or theodolite has a U-shaped support 1 for the apparatus between the arms 3 of which the apparatus is supported while the part 2 joining the limbs has three conical apertures with divergent axes to receive tubular legs consisting of tubes 10, 11 connected by tapered spigot and socket joints.