baber/WOPTO huggingface dataset:
Patent GB-703730-A (GB)
Title: Improvements in variable output voltage transformers
IPC: H01F29/12
Filed: 1951-11-14
Abstract: 703,730. Transformers. OAKLEY, J. L. D. (Marti, B. G.). Nov. 14, 1951, No. 26669/51. Class 38 (2) A variable voltage transformer having primary and secondary windings which are relatively movable to vary the output voltage of the transformer in dependence upon the load, the transformer comprising a pair of magnetic cores in face to face contact and relatively movable while maintaining a constant minimum air gap therebetween, the primary windings being mounted in grooves in one core, the secondary windings in grooves in the other core, and a number of short circuited windings mounted in grooves in one of the cores to compensate for stray fluxes. The transformer comprises a wound strip magnetic core 16 secured to a preferably non-magnetic yoke 10, the primary windings 23, 24 and the compensating windings 27, 28 being housed respectively in grooves, which are at 90 degrees to each other, in the contact face 17 of the core. A non-magnetic rod 31, secured to the yoke 10 forms a spindle about which a further preferably non-magnetic yoke 37 revolves, the yoke having secured thereto another wound strip magnetic core 43 also having grooves in its contact face 45 in which are housed the secondary' windings 48, 49. The relative positions of the primary and secondary windings are varied by rotating the core 43 with respect to the core 16, one suitable means of effecting this being as shown by an electric motor 56 and gearing 57, 58, 61, 55. Thus the coupling between the primary and secondary windings is altered whilst the reluctance of the magnetic circuit remains substantially constant. In order to reduce the friction between the cores the contact face of the movable core 43 may be relieved as at 44. The change in coupling may be dependent on any desired factors, such as variations in the load circuit, connected to the secondary windings 48, 49. In the polyphase embodiment of the invention a number of single phase structures as above may be used or one of the above structures may have the windings suitably modified. In the single phase embodiment the variation of the secondary voltage is in magnitude only, whilst in the polyphase embodiment the variation is in the phase between primary and secondary voltages. The transformer finds useful application as a normal induction regulator.
Patent GB-447867-A (GB)
Title: Improvements in piano string systems
IPC: G10C3/08
Filed: 1935-09-26
Abstract: 447,867. Pianofortes. OSTLUND, A. E. P., 38, Korstrandsgatan, Stockholm, and CUNNFORS, S., 4, Jonsborgsvagen, Angby, both in Sweden. Sept. 26, 1935, No. 26690. [Class 88 (ii)] A horizontal overstrung pianoforte with rectangular frame has the bass strings 4 extending diagonally across the frame, the bass wrestplank and bass strike-line 16 extending across the corner of the frame nearest the bass keys and forming an obtuse angle with the treble wrestplank and treble strike-line 15. The treble strings extend from their wrestplank fan-wise towards the rear of the frame. To provide more space for the bass action-units, they are arranged at right angles to the bass strike-line 16 being actuated by the keys through intermediate horizontal lever-arms 36 working in the same planes as the action-units. The bass keys, progressively longer down the scale, are fulcrumed on a rail 22 inclined at an angle. The bass back-checks are carried on, and the bass dampers raised by, the auxiliary lever-arms 36. The dampers of the treble strings, carried by arms pivotally mounted on the front edge of the soundboard, are raised by the back checks which are carried by the keys.
Patent GB-629448-A (GB)
Title: Improvements in or relating to pads, blocks, tablets and like forms of assembled sheets
IPC: B42D17/00
Filed: 1947-10-03
Abstract: 629,448. Book-binding ; hanging attachments. DILNOT, H. S. Oct. 3, 1947, No. 26692. [Class 16] In a pad in which sheets 1, bound by a helical coil 4 passing through perforations 3 in the sheets near the upper edge, are intended to be turned over the binding, the binding is interrupted at a point between the side edges of the pad and a hanger 7 is provided in the form of a length of wire or other stiff attenuated material, the end portions of which are engaged in the convolutions of the binding coil 4 and the middle part is exposed so that it can be engaged over a hook or nail. The sheets 1 and a backing sheet 2 have the perforations 3 in two sets leaving an unbound portion 6, the binding coil 4 being in two parts. The hanger 7 is substantially horizontal in its middle portion with a central arch 10 to engage a nail and the ends 8 bent downwards to form legs which pass downwardly and lie between the sheets 1 and the backing sheet 2. The ends 8 maybe turned back on themselves to provide a smooth finish. The sheets 1 and 2 may have a scallop 13 so that the sheets do not touch the arch 10 when being turned over. According to the Provisional Specification the binding may comprise a series of rings or loops passing through the perforations 3.
Patent GB-928748-A (GB)
Title: Resistor device
Inventor: RAYBURN CHARLES CALVIN
IPC: H01B1/24
Filed: 1961-07-24
Abstract: 928,748. Fixed resistors. ACF INDUSTRIES Inc. July 24, 1961, No. 26755/61. Class 37. A resistor device comprises an insulating support 10, a continuous annular strip of resistive material on the support and enclosing an area thereof, a plurality of terminal strips 16 extending from the edge portion of the support across and in contact with the resistive annulus. The resistive material may comprise a specified carbon composition coated on the surface of a high-temperature non-hygroscopic plastic film, a central hole being punched in the film having a size in accordance with the required value of resistance, and the film then being applied to the support 10. The terminal strips 16 may be sprayed or painted on and may extend via path 18 to the conductive coating in notches 12, Fig. 1. Figs. 5, 6, 7, 8 (not shown) illustrate various interconnections of the terminal strips 16 to provide different resistance values from the same unit resistor and Fig. 9 (not shown) illustrates an oval resistance annulus.
Patent GB-704339-A (GB)
Title: Magnetic induction accelerator in which the acceleration and the guiding flux is produced by an excitation winding arranged coaxially with the annular tube
IPC: H05H11/02
Filed: 1950-11-02
Abstract: 704,339. Magnetic induction accelerators. AKT.- GES. BROWN, BOVERI, & CIE. Nov. 2, 1950 [Nov. 2, 1949], No. 26781/50. Class 39(1) In a magnetic induction accelerator in which the accelerating and guiding fields are produced by a single winding 20, 21, Fig. 1, coaxial with the annular discharge tube 10, two iron cores 18, 19 at least one of which is movable are disposed in central apertures in the main magnet parts 15, 16 to adjust the ratio between the accelerating and guiding fields and/or the form of the guiding field. The accelerating field is varied while keeping the guiding field constant by removing the upper core 18 and inserting non-magnetic spacers 24, 25 in the air-gap and then clamping the assembly by bolt 26 and pressure plates 27, 28. If the guiding field is non uniform circumferentially, the cores 18, 19 can be displaced eccentrically while keeping the air-gap 17 fixed, or alternatively core 19 is kept fixed and the upper end of core 18 is canted by means of set screws 29, and in either of these ways the guiding field can be made uniform. The guiding field is set up across pole faces 11, 12 and the accelerating field across gaps 14 and 17, and the iron path is completed by a plurality of yokes 22, 23, (only two shown). A stream of cooling air can be blown through the air gap between iron cores 18, 19 and iron bodies 15, 16 to cool the iron parts. The iron parts 15, 16, 18, 19 may be constructed of radial laminations as described in Specification 482,771, [Group XXXV].
Patent GB-409657-A (GB)
Title: Improvements in and connected with roofing and like tiles
IPC: E04D1/16
Filed: 1932-09-27
Abstract: 409,657. Roofing-tiles. HUTCHINSON, J. H., 33, Station Road, Portslade-by- Sea, Sussex, and PIPES, Ltd., Africa House, Kingsway, London. Sept. 27, 1932, No. 26812. [Class 87 (i).] A roofing or like tile of the "double-lap" variety, in which each tile overlaps two tile thicknesses beneath, is formed with a supporting rib b on its undersurface for engagement with a batten, and a drainage channel extending down its upper surface from a top obstructing rib a and merging into the surface of the tile at an intermediate point in its length. As shown, the drainage channel comprises two longitudinal limbs e of a depth which increases towards the top, where they are joined by a depression f. If desired, the side portions g may be flush at the top with the rib a and taper downwardly. The central portion g<1> may serve as a guide in laying the tiles. Supplementary tiles, a half and one-and-a-half times the size of the normal tiles, may be provided for finishing the edge of the roofing.
Patent GB-1497025-A (GB)
Title: Method of producing cast refractory inorganic materials
IPC: C01B31/30
Filed: 1976-06-28
Abstract: Cast inorganic materials of high melting point are produced from at least one of the oxides of the metals of groups IV, V and VI of the Period Table, a metallic reducing agent and a non-metal or an oxide thereof. A small zone of the surface of the mixture of the starting materials is caused to ignite which leads to the burning zone spreading across the starting mixture. The burning is carried out under a pressure of the gaseous medium of 1-5000 atmospheres. The materials obtained, namely carbides, borides, silicides and nitrides as well as alloys can be used for the fabrication of components and equipment in machine tool construction.
Patent GB-214944-A (GB)
Title: Improvements relating to cooling enclosed dynamo-electric generators and motors
IPC: H02K9/00
Filed: 1923-10-27
Abstract: 214,944. Ehrmann, P. April 27, 1923, [Convention date]. Armatures and field magnets, cooling and ventilating; motors, cooling.-An arrangement for cooling enclosed motors comprises the circulation of an enclosed stream of air through the rotor and over a section 6, Fig. 2, of the external surface of the stator iron, to which it transfers its heat for conduction to a stream of atmospheric air which is passed over the remaining section 4 of the said surface. The stator laminations are provided with heat-radiating vanes 11<1> - - 11<8> of which the set 11<1> only receives heat from the enclosed circulating air stream, and the remainder give up heat to the stream of atmospheric air. The internal air is circulated by a fan 35 through passages 33 in the rotor and through chambers 24, 25 in a hood 18 communicating with the chamber in which the vanes 11<1> are located, as shown in the upper half of Fig. 3, and the atmospheric air is drawn through the machine by a fan 36 as shown in the lower half of the Figure. The Specification, as open to inspection under Sect. 91 (3) (a), comprises also the provision of slots 48, Fig. 14 (Cancelled), in the motor casing through which project heat-radiating vanes 10 formed on the stator laminations, the motor being enclosed in a drum 50 to enable a current of air to be drawn over the vanes by the aid of a ventilating-shaft 51 or a pump. This subjectmatter does not appear in the Specification as accepted.
Patent GB-1187663-A (GB)
Title: Roadway Markers
IPC: E01F9/06
Filed: 1967-06-12
Abstract: 1,187,663. Reflex reflectors. ELASTIC STOP NUT CORP. OF AMERICA. June 12, 1967 [Oct. 12, 1966], No. 26938/67. Heading G2J. [Also in Division E1] A solid road marking stud of truncated pyramid form has a raised relatively small reflex reflecting insert 34 of triple-mirror cube-corner type in one or both of its sloping front and rear faces the cube-corner axes being inclined to the normal and approximately aligned with refracted horizontal light rays.
Patent GB-700835-A (GB)
Title: Apparatus for grinding and/or polishing glass sheets
IPC: B24B7/24
Filed: 1951-11-16
Abstract: 700,835. Grinding and polishing glass. GLACERIES DE LA SAMBRE SOC. ANON. Nov. 16, 1951 [Dec. 9, 1950; July 6, 1951], No. 26984/51. Class 60 Apparatus for grinding or polishing glass sheets on one or both faces comprises a number of rotary tools mounted on vertically adjustable shafts in carrying beams, the tool shafts of each beam being mounted for both independent and simultaneous adjustment. Each tool 1, Fig. 1, is driven by a worm 6 and a worm wheel 5 slidably keyed to its shaft 2 which rests on a ball race 20 and a member 14 in screw-threaded engagement with a manually rotatable sleeve 13 for independent adjustment of the tool. To enable simultaneous adjustment to be effected each tool has a screw 7 in engagement with a worm wheel 8, the worms, co-operating with the worm wheels, being mounted on a common shaft 11 rotatably supported in the beam 4 and provided with a hand wheel. In another embodiment, Fig. 3, a number of tools 22 each mounted in a sleeve 28, Fig. 5, for vertical'adjustment by a screw 31 are carried by a support 24 secured to a rotating shaft 25. The latter is arranged for vertical adjustment with respect to a cross member 26 by means of a screwed sleeve 34, Fig. 6, a worm wheel 35 and a worm 36. A ball race 33 is interposed between the shaft and the sleeve. The cross member 26 is supported by guides 27 and may be vertically adjusted by a screwed sleeve 39, a worm wheel 40 and a worm 41. The sleeve 39 is connected to the member 26 by a shaft 38 guided by a plunger 42 which may be fluid controlled to provide an adjusting means in place of the sleeve 39. Similar means may be provided to adjust the shafts 23 and 25. A rubber ring may be interposed between each shaft. and its tool to allow the latter to align itself with the glass sheet which may be fed past the tools by rollers.
Patent GB-196541-A (GB)
Title: An appliance for the prevention of theft by pickpockets
IPC: A45C13/18
Filed: 1922-10-06
Abstract: 196,541. Foster, A. H. Oct. 6, 1922. No Patent granted (Sealing fee not paid). Pockets, retaining pocket books, letters, &c. in.- Consists of a plate, A provided at its corners with holes C for attachment to the inside of the pocket by sewing, spring studs, &c. and having its top portion reduced in width and bent over to form an integral spring clip B. Pocket books, letters, &c. placed in the pocket are pulled up under the clip B to prevent theft by pickpockets.
Patent GB-491628-A (GB)
Title: Improvements in clutch devices for rotating movable parts or rods
IPC: B60N2/06
Filed: 1937-10-07
Abstract: 491,628. Clutches. SLEIGH, H. L., CHESTON, A. S., and OLDHAM, F. A. M. Oct. 7, 1937, No. 27170. [Class 80 (ii)] A member 3, adapted to be rotated by means of a handle 10 on a radial arm 9, encircles a pair of collars 7 and 8, separated by balls 22 and secured one to each of a pair of shafts 1 and 2 arranged one within the other, and plungers 12 and 13 slidable radially in the member 3 are adapted to be projected alternatively into engagement with recesses 11 in the collars so as selectively to connect either shaft 1 or 2 to the member 5. A forked lever 17 pivoted on a pin 18 secured in a slot 15 in the arm 9 has recesses in the end of its forks which engage trunnions 12a and 13a on the plungers 12 and 13, a recessed rockable member 14, passing through the slot 15, being also held against the trunnions by a spring- loaded plunger 23. With the lever 17 occupying the position shown, plunger 12 is withdrawn and plunger 13 engages the recess 11 in the collar 8. By moving the lever clockwise, plunger 13 is withdrawn and plunger 12 is engaged with the recess 11 in the collar 7. The lever 17 is retained in its limiting positions by a spring detent 20 co-operating with recesses in a plate 21 secured to the member 3. The plungers 12 and 13 may be coned to engage conical recesses, whereby the engaged plunger may ride out of its recess when the resistance to movement is abnormal. Specification 488,659 is disclaimed.
Patent GB-426486-A (GB)
Title: Improvements in or relating to thermally released electric overload circuit breakers
IPC: H01H71/16
Filed: 1933-10-03
Abstract: 426,486. Automatic circuit-breakers. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.- (Assignees of Getchell, B. E.; Plainville, Connecticut, U.S.A.) Oct. 3, 1933, No. 27180. Convention date, Oct. 3, 1932. [Class 38 (v)] In a thermally-released automatic circuitbreaker, in order to prevent damage to the circuit-breaker and possible flash-overs caused by excessive heating of the heater unit due to the large amount of power developed between the heater terminals on excessive overloads in the protected circuit, a restricted arc gap is arranged between the heater terminals so that excess power developed in these circumstances can be safely dissipated across such gap. As shown in Fig. 7 the heater unit, which is arranged to be readily detachable from the circuit-breaker, consists of a coil of resistance material 31 wound on a layer of mica 33 surrounding one arm of a bracket 30, one end of the coil 31 being connected at 32 to the supporting bracket and the other end passing to terminal plate 28 (Fig. 4). Between the two terminal connections of the heater coil is arranged a restricted gap 50 of not more than <1>/32" defined by the sides of a slot 51 formed in the mica covering 33 so that on excess voltages developing across the heater terminals an arc is established across this gap and excess current is shunted away from the heater coil. The impulse in the circuit caused by the striking of the arc causes a surge therein which will then blow a fuse to break the circuit before the arc has assumed sufficient destructive force to injure the heater element or switch parts. The heater unit preferably made readily replaceable. The heater coil is arranged below a bimetallic releasing member 40 which on bending rocks a pivoted tripping lever 45, (Fig. 3) so releasing a pivoted catch 20 connected by a link 22 to the arm 27 carrying the movable contacts 14. These are engaged with fixed contacts 12, 13 by the raising of the operating lever 15, a slot 26 in which reacts on a pin 25 to move the contacts 14 into engagement in which position they are retained by the pin 25 moving into a side recess 26 of the slot 27. When, however, thermal tripping occurs in the manner described the lower end of the lever 23 moves to the right under the action of the spring 19 so breaking the circuit.
Patent GB-1009581-A (GB)
Title: Aircraft refuelling system
Inventor: DONNELLY IVAN ARTHUR
IPC: B64D39/00
Filed: 1963-07-10
Abstract: 1,009,581. Forcing liquids by gaseous pressure. HELICOPTER SALES Ltd. June 22, 1964 [July 10, 1963], No. 27315/63. Heading F1R. [Also in Divisions A4 and B7] A system for refuelling aircraft comprises pressure supply means adapted to be carried by the aircraft and having an outlet terminating in a first quick release coupling associated with a mating quick release coupling on a gas pressure connected to a refuelling or storage tank, an outlet from said refuelling or storage tank for receiving a fuel feed pipe terminating in a second quick release coupling associated with a second mating quick release coupling connected, by a refuelling pipe, to the aircraft fuel tank. The aircraft, specifically a helicopter 1, carries a bottle 6 of pressure gas and a fuel tank 2 respectively connected by conduits 9, 4 to quick release connectors 10, 11 mounted on a support plate 13. Mating connectors 18, 12, mounted on a plate 21, are connected by conduits 17, 16 to a fuel tank 14, which may be used on land or float on water. An earthing and lifting cable 22 connects plate 21 to tank 14. In operation, with the helicopter hovering, the plate 21 and connectors 18, 12, are picked up by the helicopter and the respective connectors 18, 10 and 12, 11 brought together. A valve 8 is opened to supply pressure gas through conduits 9, 17 to tank 14, thereby pressurising the tank and forcing fuel through conduits 16, 4 to tank 2.
Patent GB-213528-A (GB)
Title: Improvements in acoustic horns
IPC: G10K13/00
Filed: 1923-10-31
Abstract: 213,528. Western Electric Co., Ltd., (Assignees of Harrison. H. C.). March 28, 1923, [Convention date]. Sound magnifying and directing appliances. - A horn for loud speaking telephones &c. comprises a bell portion 53 divided by a partition 57 in which are formed curved passages 60, 61 communicating at their inner ends with an inlet throat 62 and at their outer ends with one another and with the two halves 59 of the bell. The horn of a phonograph &c. is constructed so that the cross-sectional area of the sound path increases according to the exponential law. A mathematical investigation is given in the Specification from which it is deduced that in constructing, according to this law, a horn of circular section which will transmit all desired frequencies freely and without reflection, the area of the mouth should be chosen so that the greatest wavelength to be transmitted is not greater than twice the diameter, whilst the rate of taper is determined by making the mouth diameter of the horn approximately equal to one-quarter of the wavelength of the critical frequency. This critical frequency is defined as that frequency below which the surge impedance of an infinite length of horn is pure reactance, and both it and the rate of taper are calculated from formulae given.
Patent GB-825921-A (GB)
Title: Substituted carbanilides
IPC: C07C275/30
Filed: 1956-09-06
Abstract: The invention comprises N-methyl-4 : 41-dinitrocarbanilide and a process for the preparation of carbanilides of the formula <FORM:0825921/IV (b)/1> in general, wherein R is methyl, ethyl or hydrogen, at least one such group being methyl or ethyl, R1 is hydrogen or a C1-5 alkyl group and R11 is a nitro, cyano or carboxyl group, by reacting an amine of the formula <FORM:0825921/IV (b)/2> with an isocyanate <FORM:0825921/IV (b)/3> to give the N-mono-substituted urea compounds, or by reacting an amine of the formula I with a substituted N-phenyl carbamyl chloride.  In examples: (1) N-methyl-p-nitroaniline is reacted with p-nitrophenylisocyanate to give N - methyl - 4 : 41 - dinitrocarbanilide; (2) N-ethyl - p - nitroaniline is reacted with p - nitrophenylisocyanate to give N-ethyl-4 : 41-dinitrocarbanilide; and (3) N-ethyl-N-(4-nitrophenyl)carbamyl chloride is reacted with N-ethyl-p-nitroaniline to give N : N1-diethyl-4 : 41-dinitrocarbanilide.  The compounds are used in the treatment of coccidiosis.  Specification 825,922, [Group VI], is referred to.ALSO:Compositions for the treatment of coccidiosis in poultry comprise N-methyl-4 : 41-dinitrocarbanilide (see Group IV (b)) and an inert non-toxic carrier.  Specification 825,922 is referred to.