baber/WOPTO huggingface dataset:
Patent FI-982313-A (FI)
Inventor: MIETTINEN ERKKI
IPC: H02M7/538
Filed: 1998-10-26
Abstract: An inverter which comprises a direct voltage intermediate circuit consisting of a positive (Udc+) and a negative (Udc-) voltage busbar, and an auxiliary voltage source (1) which generates auxiliary voltages (U1, U2, U3) referenced to the positive (Udc+) and the negative (Udc-) voltage busbar of the direct voltage intermediate circuit, the inverter also comprising for each phase an upper (2) and a lower (3) power semiconductor, which are connected in series between the positive and the negative voltage busbar, the point between the semiconductors forming the phase output (Uout) of the inverter, an upper (4) and a lower (5) gate driver the outputs (8,9) of which are connected to the control electrode (G) of the respective upper (2) and lower (3) power semiconductors and which comprise a positive (6) and a negative (7) auxiliary voltage input and a zero potential point (Com), which is connected to the output electrode (E) of the power semiconductor to be controlled, a first diode (D1) the anode of which is connected to the positive auxiliary voltage (U2) referenced to the negative voltage busbar (Udc-) and the cathode to the positive auxiliary voltage input (6) of the upper gate driver (4), and a first capacitor (C1) which is connected between the positive auxiliary voltage input (6) of the upper gate driver (4) and the zero potential point (Com). The inverter also comprises for each phase another diode (D2) the anode of the which is connected to the negative auxiliary voltage input (7) of the upper gate driver and the cathode to the negative auxiliary voltage (U3) referenced to the positive busbar (Udc+), and another capacitor (C2) which is connected between the negative auxiliary voltage input (7) and the zero potential point (Com) of the upper gate driver (4). <IMAGE>
Patent GB-267654-A (GB)
Title: Improvements in or relating to the production of ground and polished plates of glass and apparatus therefor
IPC: B24B7/24
Filed: 1926-01-13
Abstract: 267,654. Pilkington Bros., Ltd., and Waldron, F. B. Jan. 13, 1926. Flat extended surfaces, surfacing; guides and rests; spindle mountings; wheels.-Glass issuing from a tank 1 is formed into strip 2 at 1<a>, and passing through a lehr 3, is fed by rollers 4 to apparatus which grinds and polishes both faces of the sheet simultaneously; alternatively the sheet may be cut up into plates at 3a, subsequently being ground and polished on both faces simultaneously. The grinding and polishing apparatus consists of a series of upper and lower runners, the glass being moved therebetween by lower rollers 7 and upper rollers 8. Each lower grinding-runner comprises nogs 5<a> carried by a disc 12 mounted on a vertical hollow shaft 9 running in bearings 10 in a tube 11 slidable in a casing 13, a casing 16 secured to the tube 11 enclosing bevel gearing 17, 18 for driving the shaft; the weight of the casing 11 &c. is counterbalanced by a weight 27, and the runner may be raised or lowered by operation through bevel gearing 23, 24 of a nut 22 engaging a screwed rod 20 fixed to the casing 16. Water and abrading-material are fed to a casing 31 and thence through the shaft 9 to the runner. The upper runners are similar to the lower runners, but are supported by adjustable rods 20 screwed to engage adjusting nuts 22; for rapid lifting, levers 34 are employed. The lower rollers 7 are each driven through worm and chain gearing 51 - - 54 and are carried by a pair of frames 38 carried by guide rods 39 and connected by a link 40 to a lever 41 having an arm 42 carrying a weight 45, and having a pointer 46 moving over a scale 47; wear of the grinder may be compensated for by adjustment of the nut 22 to bring the pointer back to a given position. An automatic electric device, Fig. 3, may be employed for compensating for wear comprising a fixed contact 58 and a contact 57 on the lever 42, which as the roller 7 falls due to wear of the grinder, come together and close the of a solenoid 60, which moves a lever 61 to close the circuit of a motor for driving the nut 22. The roller 8 is carried by a frame 48 sliding on the guides 39, springs 49 moving the frames 38, 48 in opposite directions. The shaft of the upper roller is solid, water &c. being supplied externally. The grinding-runners have the outer row of nogs formed with a perpipheral ring to retain abrasive etc.; a ring shield may be employed in place of forming the nogs integral with the shield, and a ring may be employed similarly with the polishing-runners. The polishing-runners have several heads on a frame, the tubular shaft having tubular extensions approaching the heads to apply the water &c. close to the heads. In a modification, the glass lies in a vertical plane during grinding, &c., the runners having their shafts horizontal, rollers supporting the glass at its lower edge. Guide rollers also may be employed above the glass, and in the first constructional form may be employed at the side edges of the glass.
Patent GB-679139-A (GB)
Title: Device for mending hosiery
IPC: D04B17/00
Filed: 1950-01-16
Abstract: 679,139. Rotary brushes. MARVEL SPECIALTY CO. Jan. 16, 1950 [Oct. 14, 1949], No. 1104/50. Class 19. [Also in Group VII] A rotary device for working back into place a thread loop b which has become drawn out of knitted fabric comprises a set of work - engaging elements 11 secured to a hub, for example by being clamped between the halves of a divided hub. The elements are preferably curved, as shown, and substantially co-planar, and are preferably thin, smooth, and somewhat resilient, being made of metal (preferably steel) or of other suitable substances such as plastic material, bristles, or fibre.
Patent GB-684888-A (GB)
Title: Improvements relating to hypodermic injection apparatus
IPC: A61M5/20
Filed: 1951-01-15
Abstract: 684,888. Hypodermic injection devices. BECTON, DICKINSON & CO. Jan. 15, 1951 [Feb. 7, 1950], No. 1104/51. Class 81 (ii). Hypodermic injection apparatus includes a medicament chamber wherein a needle assembly, which supports a hypodermic needle, is movably mounted so that the needle is projected through an aperture in an end member of the apparatus when the needle assembly is moved towards the end member, resilient means being provided for urging the needle assembly towards its retracted position, and a power-operated plunger to cause projection of the needle assembly and expulsion of medicament. The medicament receiving chamber is included within a casing 10 which also houses an electromagnet 31 and a plunger 28 connected with an armature 29 which is normally held in retracted position by a spring 30. A slidable sleeve 21 is provided with a transverse wall 24 fitted with a cannula 25. An ampoule tube 17 fitted with a piston stopper 18 and another stopper 19 is contained within the sleeve 21. A skin-contacting cap 15 is provided internally with a spring 16 which normally holds the sleeve 21 in retracted position. When the electromagnet 31 is energised by operating a control device 32, the armature 29 and piston 28 move forwardly, the latter pressing against the piston stopper 18. The ampoule, sleeve 21 and cannula 25 are thus caused to move forwardly until the spring 16 in the cap 15 is fully compressed, the cannula 25 being projected from the apparatus to penetrate the tissues. Further forward movement of the armature 29 and piston 28 pushes the piston stopper 18 into the ampoule 17 to expel medicament through the cannula 25. After discharge of medicament the electromagnet 31 is deenergised and the armature 29, piston 28, ampoule and the sleeve 21 carrying the cannula 25 are retracted by the action of the springs 16, 30. Inspection openings 26, 27 are provided in the casing 10 and the sleeve 21. The removal of the cap 15 permits removal of the sleeve 21 and cannula 25 for sterilisation, the renewal of the ampoule 17 and the replacement of parts for re-use.
Patent GB-195102-A (GB)
Title: Improvements in high frequency transformers
IPC: H01F19/00
Filed: 1918-01-19
Abstract: 195,102. Low, A. M. Jan. 19, 1918. Transformers. - One winding, e.g. the secondary winding, of a highfrequency transformer comprises two sets of turns a, b arranged eccentrically to one another, the turns constituting one set being of smaller diameter than those of the other set. The effect is to produce a small high-tension current and a larger lowtension current with a phase difference between them, rendering the transformer suitable for use in the wireless control of torpedoes, aeroplanes or other objects from a distance.
Patent GB-899749-A (GB)
Title: Improvements relating to signal generating devices for radar systems
IPC: G01S7/40
Filed: 1959-01-12
Abstract: 899,749. Pulse radar. SOC. NOUVELLE D'ELECTRONIQUE. Jan. 12, 1959 [Jan. 17, 1958], No. 1123/59. Class 40(7).  Signals simulating echoes from fixed targets in an azimuth-scanning pulse radar are generated by representing the fixed target responses Z 1 , Z 2 .., Fig. 2a, that would be produced by the radar on a conventional CRT PPI display by corresponding discrete areas on a record surface moved in synchronism with the aerial, the values of one of the co-ordinates defining the positions of the record areas on the record surface not being directly proportional to the values of the corresponding coordinate defining the positions of the corresponding targets. As shown in Fig. 2b the record surface is a disc and the discrete record areas corresponding to the responses Z 1 , Z 2 .. in Fig. 2a comprise transparent sections S 1 , S 2 . . bounded by radial lines and arcs of a number of equally spaced concentric range circles defining a finite number n, e.g. n = 10, of annular range zones, but the range zones on the disc are radially displaced outwards relative to the range zones to be simulated to avoid overcrowding near the centre of the disc. Alternatively the record member may comprise a drum or magnetic tape or the combination of a disc and magnetic tape. As shown in Fig. 3 a disc 5 of the type shown in Fig. 2b is mounted over a radial array 7 of n photo-cells and light is projected on to the disc so that when the disc is rotated in synchronism with the aerial each photo-cell receives light through the transparent portion of the corresponding range zone on the disc and produces a corresponding output. Range pulses of duration and timing corresponding to the actual ranges represented by the range zones on the disc 5 are derived from each transmitter trigger pulse by means of delay devices 11 and the range pulses corresponding to any record areas, i.e. transparent portions of the disc 5, over the line 7 of photo-cells are selected by applying the range pulses to corresponding gates 10 each of which is opened by the output from a corresponding photocell. The outputs from the gates 10 are then applied to a bistable trigger circuit 12 to give corresponding pulses of constant amplitude. As shown the output from the bistable circuit 12 is applied to close a gate 13 through which radar video signals are applied to intensity modulate a PPI display so that unwanted echoes from fixed targets are suppressed; alternatively the output from the bistable circuit 12 may intensity modulate a CRT providing a simulated radar display for training purposes. When the aerial also scans in elevation the output from the simulator may be suppressed above a predetermined elevation or height, Figs. 4a and 4b (not shown) and when the vertical radiation pattern of the aerial comprises a plurality of lobes, Fig. 1 (not shown), separate simulator means are provided for each lobe.
Patent GB-805971-A (GB)
Title: Phonograph electro-mechanical pick-up heads
IPC: H04R17/06
Filed: 1955-01-14
Abstract: 805,971. Gramophone pick-ups. ASTATIC CORPORATION. Jan. 14, 1955 [July 21, 1954], No. 1153/55. Class 40 (2). [Also in Group XXXIX] In a phonograph electro-mechanical pick-up head fitted in a pivotally mounted tone arm, not shown, and embodying piezo-electric crystal transducer 14 clamped at one end to the head and having secured to the other end a coupling 16 to enable a stylus to be engaged in inoperative position with the transducer, there are provided two styli 22 each secured to the head at a point remote from the working tip and each having a portion adjoining the tip releasably engageable with the coupling 16, and a styli moving mechanism movable between two extreme positions, at each of which it engages a respective stylus with the coupling 16 and so locates the remaining stylus that its working tip is disposed in an inoperative position. As shown, the styli, having tips suitable for record discs to be played at 78, and 33 or 45 r.p.m., respectively, are gripped in inclined bores in a rubber block 21 and have an upward bias sufficient to engage tightly the coupling 16. The mechanism comprises a drum 25 held rotatably in a semi-circular recess 23 in the wall of each casing half 10, 11 by leaf-springs 29, 30 secured by the head of a rivet 31 by which the casing halves are held together. The drum has for each stylus a respective helical groove 35 having two flat-bottomed deepened portions 36, and the grooves and deepened portions provide that upon a 180 degrees movement of the drum in either direction by a lever 28 both styli are lowered, translated laterally and then raised, the newly selected stylus engaging the coupling and the inoperative stylus tip rising to a position beside and above the operative stylus tip. Flattened drum projections 26, 27 engaged by the springs 30, 29 locate the two operative positions. U.S.A. Specification 2,575,999 is referred to.
Patent GB-339529-A (GB)
Title: Improvements in and relating to ventilators
IPC: B60H1/26
Filed: 1930-01-13
Abstract: 339,529. Rogers, R. J., Bombard, J. A., and Dixon, E. W. Jan. 13, 1930. Ventilating vehicles; passages and pipes arrangements of; 'valves and valve, apparatus.- In a ventilator of the kind comprising a tubular body having an opening adjacent to each end and divided into two portions by a transverse partition, U-apertures being formed in the body, one at each side of the partition the apertures adjacent the partition are adapted to be regulated simultaneously by a single member. As shown, applied to a motor car, the tubular body portion is adapted to fit between the top 2 and lining 3 of the roof of the car and is formed in three sections, a middle section 11 with an opening 13 into the car and a transverse partition 14 and front and rear sections 9 and 10 whose inner ends are adapted tc fit into the ends of the section 11. The opening 13 is controlled by a cap 31 across the centre of which are two plates 34 adapted to slide on the partition 14 which is formed at the middle intc a hollow part 35. A stem 37 with handle 42 is rotatably mounted in the cap 31 and is free to move longitudinally in the hollow post 35 for the purpose of adjusting the cap which is held in the open or closed position by the engagement of a pin 44. on the stem) with seatings 47 or 46 of a slot 45 in the post 35. An annular wall 32 of screening prevents the passage of foreign matter. A partition 21 in the front section 9 forms a chamber 23 which communicates with the interior of the vehicle through an opening 27 controlled by a door 49. The chamber houses a deflector plate 30 and a screen 29. The door 49 may be opened against the action of a spring 51 and is held in position by a latch drive comprising a pivotally mounted pawl 53 with a tooth 55 which normally engages, under the action of a spring with one of several openings in a strip 57, but may be withdrawn by means of a plunger 60 acting on the pawl. A similar chamber 25 is formed in the rear section 10. Additional screens 17 and 19 are provided at the front and rear ends of the tubular body. In operation, air entering the front section 9 will be discharged into the vehicle through one of the openings 27 or 13 or through both and air may leave at the rear of the vehicle through either or both openings 13 and 28. In a modification, Fig. 6, the ventilator is disposed in the side of a vehicle such as a railway car and the transverse partition is in the form of two curved plates 73 spaced to accommodate a plate 75 attached to a cap 68 operated by a handle 72 to adjust the air passage.
Patent GB-269641-A (GB)
Title: Improvements in electro-pneumatic valves
IPC: B60T13/66
Filed: 1926-01-16
Abstract: 269,641. Glenn, S. L., and Pierce, E. E. Jan. 16, 1926. Electric and pneumatic operation.-An electropneumatic valve for controlling the air supply to the cylinder of a railway point operating or switch machine comprises a casting 1 with a flange for bolting direct to the operating cylinder of a switch machine with a single inlet port and two outlet ports 3. Two valve casings 5 each with pairs of opposed conical valves 8, are mounted on the upper side of the main casting with corresponding double solenoids and double weatherproof casings 21 on the under side. One set of valves is provided for normal operation and the other for reverse operation. The valve casings are registered on the main casting by three flanged ears and dowel pins. The coils of each double solenoid are of different characteristics and are connected in parallel across a single-phase supply, the different impedances being such as to produce phase lagging one behind the other, thus eliminating the irregularity of tractive effort due to a single-phase current. For example, one coil may have a large number of turns of low resistance, while the other coil may have a small number of turns of high resistance: the latter co.il may be wound, in part, with resistance wire. In conjunction with the above the fixed solenoid cores may be "shaded," as described in Specification 269,640. The fixed cores 23, 26 are located by screws spigot projectidns 24, 27; the moving cores are split longitudinally and are screwed to the brass valve rod 12 and locked thereon after adjustment by split pins engaging slots in the lower ends. Each coil is located by a coil tube 32, and by an upper felt &c. packing washer 33. A lower packing washer 34, secured by a screw 35, prevents the lower coil from falling down when the screwed bottom cover 22 is removed. Specifications 6551/91 and 11623/13 also are referred to.
Patent GB-684058-A (GB)
Title: Improvements in or relating to frequency changers for radio receivers
Inventor: WHITE GERALD JAMES
IPC: H03D7/08
Filed: 1951-01-17
Abstract: 684,058. Superheterodyne circuits. MULLARD RADIO VALVE CO., Ltd. Jan. 17, 1951, No. 1306/51. Classes 40 (v) and 40 (vi). A self-oscillating frequency-changer comprises a valve 9 having a parallel resonant circuit 13 tuned to the oscillator frequency, connected between grid and earth, a signal source supplying a second resonant circuit 5, 8 tuned to signal frequency and connected between the cathode and earth, while intermediate frequency output is taken from a further tuned circuit 10 connected to the anode of the valve. The signal frequency is lower than the local oscillator frequency, so that at the latter the circuit 5, 8 presents a capaciattive impedance, which in conjunction with the gridcathode capacity of the valve 9 causes the valve to present a negative resistance to the circuit 13 whereby oscillations are generated. Grid condenser 11 is selected to resonate with the circuit 13 at signal frequency so that the grid is effectively grounded at this frequency. The signal source comprises a triode amplifier 6 having the circuit 5, 8 as anode load, the anodegrid capacity of this valve being tuned out at signal frequency by means of inductance 4.
Patent GB-510851-A (GB)
Title: Improvements in holders for diamond tools
IPC: B23B29/034
Filed: 1939-01-14
Abstract: 510,851. Diamond tools. DIAMOND TOOLS, Ltd., and ECCLES, R. P. Jan. 14, 1939, No. 1313. [Class 124] [Also in Group XXII] A tool-holder for a diamond or like cutter, suitable for use in a boring-bar, face-plate &c. comprises a body or barrel adapted to be secured in the boring-bar &c. carrying a micrometer screw engaging a carrier for the cutter, the screw and body having a circular or arcuate scale in a plane transverse to the axis of the screw. The diamond &c. cutter f is attached in known manner to the head e of a shank d which is slidably keyed within a sleeve a by one or two dowels g. The sleeve a which is spring-tempered is split at b as far as c and is compressed on the shank and held within a boring-bar h by means of a set screw j. A micrometer screw k engages a tapped hole in the shank and is held with its head against the base of a recess in the sleeve by a spring p. The screw head is provided with an index mark o, Fig. 2, reading against a scale m on the annular end of the sleeve. In a modification the screw is necked at t, Fig. 5, to receive a yoke v engaging a recess in the sleeve a whereby it is prevented from moving axially, or alternatively the yoke might be soldered to the end of the sleeve or replaced by a grub screw. The dowels g might be replaced by a key caulked into a slot in the shank d and sliding in the saw-cut b of the sleeve a. The screw j engages a recess in the sleeve a and several recesses may be provided to allow for adjustment of the cutter to different diameters. The boring- bar or face-plate may carry a single cutter or a number of cutters set to take the same or different cuts.
Patent GB-579200-A (GB)
Title: Improvements in or relating to electrical toasting apparatus
IPC: A47J37/08
Filed: 1944-01-24
Abstract: 579,200. Electric toasters. SAXER, T. Jan. 24, 1944, No. 1339. [Class 39 (iii)] In an electrical toasting apparatus in which articles of food are traversed along a radiating surface, the heat radiating device comprises a frame 15 carrying refractory rods 16 wound helically with a conductor so that the turns at the ends are closer than at the centre, whereby a more uniform toasting effect is obtained. Three groups of rods 17, 18, 19 are employed, spaced by gaps 20. A conveyer may move between upper and lower heaters of this form, in which the groups of one are opposite either the groups or the gaps of the other. The groups may be connected in parallel, and a central group may be thermostatically controlled. In another arrangement, the rods are parallel to the movement of the conveyer and are closer, together at the sides of the frame, the winding being uniform. In another form, Fig. 5, refractory blocks 23 have parallel slots 24 containing helical conductor 25, the slots being partly or wholly filled by refractory cement 26. Specifications 491,504 and 571,903, [both in Group VI], are referred to.
Patent GB-1463609-A (GB)
Title: Magnesium alloys
IPC: C22C23/06
Filed: 1974-12-30
Abstract: 1463609 Magnesium alloy MAGNESIUM ELEKTRON Ltd 14 Jan 1976 [30 Dec 1974] 01363/76 Divided out of 1463608 Heading C7A A magnesium-based alloy with satisfactory aerated temperature mechanical properties suitable for aerospace application contains Mg Bal with Fe and other impurities.  Optimum properties are achieved by a solution treatment of over 450‹C followed by quenching and ageing at 100-350‹C. Typical treatments are 520‹C for 8 hours, followed by 16 hours at 200‹C. Alternatively a two stage solution treatment may be used i.e. 8 hours at 480‹C, followed by 4 hours at 520‹C, quenching and ageing 8 hours at 250‹C.
Patent GB-690860-A (GB)
Title: Improvement in spoons
IPC: A47J43/28
Filed: 1952-01-17
Abstract: 690,860. Spoons. COSBY, E. L. H. Jan. 17, 1952, No. 1373/52. Class 128 The operative end of a spoon is formed with an end edge 1a and side edges lb substantially at right angles to the end edge. As shown, the edges are positioned at an angle to the longitudinal centre line of the spoon.