baber/WOPTO huggingface dataset:
Patent GB-361924-A (GB)
Title: Improvements in or relating to electric circuit-breakers
IPC: H01H1/54
Filed: 1930-08-27
Abstract: 361,924. Heavy current switches. REYROLLE & CO., Ltd., A., Hebburn-on- Tyne, COATES, F., Cranlea, Whitburn Road, Cleadon, Durham, and ALLAN, A., Cragside, Ashleigh Grove, Tynemouth. Aug. 27, 1930, Nos. 25560/30 and 16277/31. [Class 38 (v).] Arc-rupturing devices.-In a circuit-breaker having arcing contacts, the latter, during the later part of the closing movement and earlier part of the opening movement of the breaker, form part of a circuit having auxiliary conductors disposed so that the resultant electromagnetic force on the moving parts is reduced to a value small enough to ensure that the breaker can always be moved with certainty by its operating mechanism even under short-circuit conditions. The arcs are moreover blown out in a radial direction by horizontal electromagnetic forces. In the form shown diagrammatically in Fig. 4, the main fixed contacts B, B<1> are bridged by a member C in the closed position and support a pair of fixed arcing contacts D, D<1>, which with further fixed arcing contacts E, E<1> interconnected by fixed conductors F<4>, F<5> form four brakes in series. Auxiliary conductors H2, J<2>, H<3>, J<3> are carried by an extension of the operating rod C<1> and carry movable arcing contacts H, H<1>, J, J<1>, the auxiliary conductors being in circuit when the arcing contacts, during closure, are in engagement but before the main contacts engage. With the current direction as shown, interaction between the currents in F<4>, F<5> and J<2>, J<3> tends to force the moving parts upwards against the action of forces exerted between conductors B<4>, B5 and H2, H3. By suitably locating the various conductors, the vertical forces can be arranged to neutralize one another. This arrangement can be modified by making the conductors F<4> F<5> movable also. In another diagrammatic form, Fig. 8, the movable arcing contacts R, R<1>, S, S' are caused by rods T, T<1> secured to the main movable contact L, and the fixed arcing contacts P, P<1>, Q, Q<1> are carried by vertical posts N, N<1>, O, O<1> which are connected together and to the posts M, M<1> carrying the fixed main contacts K, K<1> by means of conductors O<4>, M<2>, M<3>. In this form, the upward force on the rods T, T<1> due to the posts N, O and N', O<1> are balanced by the downward force exerted on those rods by conductors P<4>, Q<4> and P<5>, Q<5> and by the vertical parts of the current path including the arcing contacts.
Patent GB-781481-A (GB)
Title: Improvements in apparatus for regulating fuel flow in gas turbine engines
Inventor: CAREY FREDERICK HENRY
IPC: F02C9/16
Filed: 1954-09-03
Abstract: 781,481. Automatic control systems for gas turbines. DOWTY FUEL SYSTEMS, Ltd. Sept. 2, 1955 [Sept. 3, 1954], No. 25656/54. Class 38 (4). [Also in Group XXIX] In a fuel system for a gas turbine engine wherein the spill from the burners is regulated by a throttle valve in the return line controlled by a servo-operated, leak-off valve which opens against a spring, the loading of the spring is adjusted by transmission mechanism connecting including a differential movable member and differential gearing to vary co-ordination between a manual control element and a fuel-flow governor control element so as to secure correspondence between actual and selected engine speeds which are fed into the mechanism. As shown in Fig. 1, a leak-off valve 4 loaded by a spring 13 is mounted on a pivoted lever connected to a differential piston 7 subjected on opposite faces to a fluid-pressure signal of engine speed. The spring 13 abuts a cam 15 secured to a lever 17 which is connected to a two-part shaft 21 having right and left-handed screw threads which engage in a gear pinion 28 of differential gearing driven through reduction gearing by an electric motor 31. The motor 31 is connected to an amplifier 35 which receives actual engine speed signals through a tacho-generator 36 and selected engine speed signals through a potentiometer 41 operatively connected to the shaft 21. On, for example, a rise in engine speed above a speed selected by movement of a hand-lever 18, the voltage signal from the tacho-generator will exceed that from the potentiometer, the difference being amplified in the amplifier to drive the motor 31 so that the shaft 21 is increased in length to decrease the spring loading and effect a reduction in engine speed. When actual engine speed coincides with selected speed the two voltage signals received by the amplifier balance out and the motor is inoperative. A thermal responsive element 44 fitted in the tail-pipe of the gas turbine is connected to the amplifier wherein a voltage signal of temperature is amplified to operate the motor to increase the effective length of the shaft 21 to bring about a reduction of fuel discharged by the burner should the engine temperature rise above a predetermined value. In a modification, a link 21, Fig. 2, connects the manual control element to differential bevel gearing 53, 54, 56, the intermediate gear 56 being mounted on a rocker 57' formed with an arcuate rack 58 driven by the motor 31. The gears drive a rotary servo-valve 61 which supplies and exhausts pressure fluid from a double-acting servomotor 67 which adjusts the loading of the spring 13 and returns the valve 61 to its neutral position through a rack and pinion and moving seat follow-up.
Patent GB-259038-A (GB)
Title: Improvements in or relating to keyless permutation or combination locks or the like
IPC: E05B37/04
Filed: 1925-10-14
Abstract: 259,038. Higgins, E. L. Oct. 14, 1925. Locks, permutation, comprise coaxial duplex locking discs mounted on a sliding bolt-blocking member and an axially movable setting member which engages the locking discs and a series of indicating discs, in turn. The bolt 3 of the lock has two recesses 8 engaged by the thick part 7 of a sliding member 14 operated by a handle 11 and carrying locking discs, each of which comprises an outer toothed part 20 and an inner notched part 10, interconnected by a ratchet and pawl 19, 22. The discs 10 are set to permit or prevent movement of the member 14 by a toothed wheel 29 on the end of a shaft 28 turned by a knob. When the wheel 29 is in engagement with a disc 20, an arm 27 is in engagement with an indicating wheel 24 so that, by observing the characters through a window 25 on the casing 23, the locking disc engaged can be correctly set. The shaft is then moved axially till the wheel 29 engages the next disc 20 and the arm 27 the next indicating wheel 24, a plunger 31<a> engaging successive annular grooves 31 to facilitate the correct axial adjustment. In order that the shaft 28 cannot be rotated when not engaging a. locking disc and indicating wheel, the arm 27, in intermediate positions, engages recesses in fixed parts 26 of the casing 23 and stops 30 on the lock casing engage the teeth of the wheel 29. The locking discs can only rotate in one direction for setting, on account of the pawl 32. To change the combination the locking discs are set for release and the member 14 pulled out until the projections 9 are in the notches 18 of the locking rings 10. The pawl 32 is then disengaged from the locking discs by the cam-shaft 33 and the plunger 35 shot into a recess 36 to hold the member 14 in its intermediate position. The shaft 28 is then turned to move the discs 20 relatively to the discs 10 to the new combination and the pawl 32 again engaged with the locking discs. For setting by sound, one tooth 21 on the locking discs is enlarged and engages a projection 21<b> on the pawl 32 to arrest the disc at a " zero " position from which the clicks heard as the pawl 32 rides over the teeth on the discs 20 can be counted. The blocking-head 7 may be connected to the operating handle 11 through a spring to avoid shearing off the locking projections when excessive operating force is used.
Patent GB-246898-A (GB)
Title: Improvements in electrical relays
IPC: H01H50/20
Filed: 1924-10-30
Abstract: 246,898. West & Co., Ltd., A., and Bossom, R. P. Oct. 30, 1924. Electromagnetic switches ; switches, locking and unlocking. - Relates to electromagnetic relays or contactors for motor-control circuits of the type in which the armature of the seriescoil controlling the contacts is definitely locked by mechanism releasable by the shunt coil, the contacts being further maintained in the open position after release of the series coil armature until the current in this coil falls below a predetermined value. As shown in Fig. 1 the contact disc 11, 12 adapted to bridge fixed contacts 13, 14 is carried by a rod 10 pivotally attached to one arm 9 of a bell-crank pivoted at 8. The other arm 6 carries an armature 5 which is normally held against the core of the series coil 2 by a pivoted cam 16. When, however, the shunt magnet 20 is energized, the, upward movement of the core 19, after lost motion permitted bv a slot in a plate 18 carried by the core through which the tail 17 of the cam projects, rotates the cam so that the armature 5 may now leave the core of the series coil. A spring 15 is provided to draw the armature away, but the tension of this spring is so regulated that the armature is only released after the current in coil 2 has fallen below a predetermined value. When the armature is released the circuit of the shunt coil of the succeeding contactor is completed at contacts 13, 14. The current setting is effected by an arm 25 moving over a graduated scale 29, the end of the spring being placed into one of a series of holes 27 in a fixed plate 28 according to the tension required.
Patent GB-227526-A (GB)
Title: Improvements in and relating to gaiters or covers for vehicle springs
IPC: F16F1/24
Filed: 1923-10-17
Abstract: 227,526. Ramsden, H. Oct. 17, 1923. Gaiters. - Vehicle springs provided with gaiters are adapted to be lubricated by means of a collapsable conduit having discharge valves or valvular orifices and adapted to be expanded by the forced entrance of the lubricant and collapsed to express the lubricant by the resiliency of the gaiter or by auxiliary means when the pressure of forcing in the lubricant is relieved. A collapsable conduit a comprising a tube of grease-proof material extends between the gaiter and the spring along the top, sides, or both and is provided with an inlet valve whereby lubricant can be forced in by means of a grease-gun or the like at intervals along its length with discharge valves comprising V-shaped .slits c, Fig. 2, or orifices of various shapes. A wick e may be incorporated with the conduit in various ways. In Fig. 10 the grease-proof material a is secured to the wick to form the tube while in Fig. 6 the grease proof material a, a<1> is secured to the margins of two wicks, or one of the grease-proof strips may form a lining with overlapping edges for the gaiter. Spring strips may be provided for collapsing the conduit to express the lubricant. Specification 193,788 is referred to.
Patent GB-1270683-A (GB)
Title: Full frame image
IPC: G03G15/04
Filed: 1969-05-21
Abstract: 1,270,683. Photo-copying apparatus. RANK XEROX Ltd. May 21, 1969 [May 28, 1968], No.26013/69. Headings G2A and G2H. Apparatus for exposing a full frame image of a stationary planar original 10 on to a moving photo-receptor - as shown a recycling web 16 of xerographic material, but the invention also includes within its scope non-recycled photographic film - comprises a rotatable or oscillatable prism 13 and drive means connected to the prism to synchronize prism and web movement so that the portion of the web being exposed and the image to which it is exposed have substantially the same linear velocity. The web 16 is charged by a corona charging device 31 and then advanced by rollers 17, 18, 19 to an exposure position. The electrostatic latent image formed at the exposure position is developed by being cascaded with developer 33, the powder image is transferred to a support surface web 37 by means of a second corona generating device, and the web 16 is cleaned by a brush assembly 44. The web 37 may be wound onto take-up coller 42 after fixing of the image by a heat fuser 40, or may be passed to a cutter. A pulley system 50, 52, 55 links the drive of roller 17 to a crank drive shaft 56 having a crank pin 57 thereon. This pin imparts an eccentric motion to a crank arm 58 via a rod 59, thereby causing the prism 13 to be rotated. A wheel 62 on the shaft 56 carries a pin 63 which, as the wheel 62 rotates, closes a switch 64 to energize flash-lamps 12 at the appropriate place in the prism cycle. The pin 57 is radially adjustable thereby to allow selection of different arc lengths through which the prism 13 oscillates. For each arc, a corresponding setting is made to variable speed driving mechanism 53 so that the tangential velocity of the light rays refracted by the prism remain in synchronism with the linear velocity of the web 16 in the exposure position. The arc length is adjusted depending on the appropriate dimension of the original.
Patent GB-677310-A (GB)
Title: Improvements in or relating to storage electrodes for use in electron discharge tubes for storing electrical signals
IPC: H01J29/41
Filed: 1950-10-26
Abstract: 677,310. Cathode-ray tubes. RAULAND CORPORATION. Oct. 26, 1950 [Oct. 27, 1949], No. 26097/50. Class 39 (i). A storage target comprises an electron permeable supporting structure; a thin electron-permeable imperforate sheet of conductive material supported at one surface thereof by the structure, and a plurality of islands 61 made of insulating material and distributed over the other surface of the sheet and extending therefrom to a distance in the region of the thickness of the sheet. The supporting structure may be a mesh 62, Fig. 2, e.g. of vopper or nickel, and having a fineness of 50 lines per inch, or an aluminium ring 63, Fig. 3, while the aluminium sheet 60 may have a thickness less than 1000 Angstroms, preferably 2000. A nitrocellulose film is deposited on one side of the mesh and an aluminium film is evaporated on to the other side so that it is drawn into the interstices ; the nitrocellulose is then dissolved in amyl acetate and the electrode washed in alcohol and ether. Silicon dioxide, aluminium oxide or fluorides of calcium, barium or magnesium is evaporated through a 400 line mesh on the aluminium film. Alternatively, magnesium or chromium may be deposited in a predetermined pattern, e.g. parallel strips by photo-engraving and subsequently oxidized or it may be deposited by electroplating and selectively oxidized to form the islands of insulating material. The aluminium film may be deposited on a nitrocellulose film stretched over the ring 63. The islands of insulating material may cover 60 per cent of the electrode area, and the space between them may be filled with conducting segments. The electrode may be used in a storage tube of the kind, which as described in Specification 677,300, is provided with separate writing and reading beams.
Patent GB-493168-A (GB)
Title: Improvements in directional lighting fittings adapted to cooperate with a linear source of light
IPC: F21V19/00
Filed: 1937-09-30
Abstract: 493,168. Street &c. lamps. GENERAL ELECTRIC CO., Ltd., and SMYTH, J. B. S. Sept. 30, 1937, No. 26501. [Classes 75 (ii) and 75 (iv)] The holder 6 of an electric discharge street lamp 1 is slidably adjustable relative to a trough reflector 13 above the lamp by means of a screw 8, and carries a matt reflecting and diffusing plate 10 also above the lamp and a supporting stirrup 11 for it closed by a spring 12. The reflector 13 consists of a metallic coating on a glass body 14 completely enclosing the lamp. The reflector 10 is reversible, and has sides of different reflecting power.
Patent GB-846322-A (GB)
Title: Lift augmenting means
IPC: B64C3/54
Filed: 1957-08-22
Abstract: 846,322. Aircraft. AUSTRALIA, COMMONWEALTH OF. Aug. 22, 1957 [Aug. 24, 1956], No. 26572 /57. Class 4. Means for augmenting the lift on an aircraft comprises at least one tubular member on the aircraft, one or more apertures on the wall of the member between the ends thereof, means for forcing gas into the tubular member, and means operable to effect retraction of the member into the aircraft and extension thereof from the aircraft. Fig. 2 shows an aircraft wing 22 having four tubes 23 extensible from the wing tip 28. Each tube, of aerofoil section, Fig. 6, is composed of two halves 24, 25 forming a slot 27 and bolted together at intervals. The tubes are connected to a plate 29 which nests onto the wing tip when the tubes are retracted. Each tube slides in pairs of bearing pads 30, 31 in the wing, the outermost pair supporting tapered channels 34, 35 which receive tapered projections 36, 37 on the tube when the tube is fully extended, and hold the tube rigidly. Each tube is connected for extension and retraction, by a lug 44 to a looped cable 41 connected to a cross-head 40 on a jack 38. The interior of each tube is connected by telescoping tubes 47 to a manifold 46 supplied with pressure gas from a stage of a jet propulsion engine. Extension of the tubes increases the lift by the aerodynamic forces on the tubes 23, and by the effect of the gases discharged from the slots 27, and also increases the lift of the main wing 22 by increasing the effective span. This construction may be applied to helicopter rotor blades. In alternative constructions, the tubes extend spanwise from the fuselage, and are retractable with their braces or ties by swinging about vertical axes through slots in the fuselage which are provided with adjustable fairing doors. The tubes may be of circular section, and may contain a row of holes instead of a slot. The movement of the tubes may be effected by electrical, hydraulic or pneumatic means, e.g. by the pressure of the gas admitted to the tubes.
Patent GB-990718-A (GB)
Title: Improvements in and relating to junction pieces for connecting flexible feed pipes to appliances
IPC: A61C1/05
Filed: 1963-07-05
Abstract: 990,718. Junction pieces. CHIRANA PRAHA, NARODNI PODNIK. July 5, 1963 [July 16, 1962], No. 26801/63. Heading F2G. An end-piece 1 controlling the flow of working or cooling media from a flexible pipe to a dental turbine, includes at least one valve and comprises ducts 15-15 connecting with a valve seating 12 upon which is a diaphragm 7 with backing 8 retained in a recess by a nut 4 which guides a pusher 5 actuated by a bevelled interior surface of an adjusting nut 2. Coolant is fed to an implement by way of the ducts 15-15 and the valve 12 and a pressure medium is fed to a turbine rotor by way of ducts 16-16 and a valve 18, which is controlled similarly to the valve 12 by a pusher 22 actuated by a nut 13. The adjusting nuts 4 and 13 respectively are held in position by stop rings 3 and 14 which have set-screws 11 and 17.
Patent GB-989062-A (GB)
Title: Improvements in or relating to magnetic structures particularly applicable for use in magnetic catches
IPC: H01F7/02
Filed: 1961-07-25
Abstract: 989,062. Magnetic catches. R. CHARPENTIER. July 25, 1961 [July 29, 1960; Dec. 22, 1960], No. 26823/61. Heading E2A. [Also in Division H1] A magnetic structure, particularly for use in a magnetic catch, comprises a permanent magnet having polepieces arranged to provide a fixed gap in a magnetic circuit in shunt with the magnet, the length L of the magnet lying within the range #S/2   and #SS, the dimensions of the fixed gap satisfying the following conditions:   L/15 # e # L/3 5S/12 # S<SP>11</SP> #  3S where S is the area of contact of the magnet with the polepieces, L is the length of the magnet between the surfaces of contact with the polepieces, e is the width, i.e. the length in the magnetic circuit, (or sum of the widths) of the fixed gap or gaps, s" the surface area of each of those parts of the polepieces which form the fixed air gap. The magnet is made from material having a de-magnetization curve such that the induction B drops sharply from a critical point (B<SP>1</SP>, H<SP>1</SP>) in the demagnetizing field H when the field rises. The material may be an iron base alloy containing cobalt, nickel and aluminium and known by the Trade Mark "Ticonal". In the absence of an armature the permeance is such that the BH product is approximately maximum, part of the iron is close to saturation but considerable leakage flux is present. When the armature is relatively close to the polepieces a new circuit is offered for the passage of flux, the available magnetomotive force diminishes and the total permeance of the circuit increases. The leakage diminishes proportionally to the reduction of the magnetomotive force. The flux in the fixed gap becomes reduced proportionally to the reduction of magnetomotive force so that the attractive force on the armature is thus a maximum. Preferably, where s<SP>1</SP> represents the area of contact of each of the polepieces with the armature. As shown in Fig. 2, the magnet has soft iron polepieces 2 co-operating with an armature 3 and providing an air gap 4. In Fig. 3, a double fixed gap is provided between a soft iron member 5 and polepieces 2. Fig. 5 shows an arrangement in which the polepieces 2 form a cylindrical structure having fixed gaps and capable of attracting an armature, not shown, in the direction perpendicular to the plane of the paper. Figs. 7-10 (not shown) relate to other cylindrical constructions combining the features of Figs. 2, 3, 5. Figs. 13, 14 show two views of a magnetic structure having part cylindrical polepieces 2, the fixed gap being formed between the polepieces 2 and a soft iron sleeve 8. In Figs. 17, 18 the fixed gaps are formed between the polepieces 2 and a U-shaped soft iron member 9. Figs. 19, 20 show a similar construction in which a cylindrical magnet 1 carries polepieces 2, the U-shaped member being replaced by a sleeve 10. Figs. 21, 22 (not shown) relate to a structure similar to that of Fig. 19 but having only one fixed gap.
Patent GB-549484-A (GB)
Title: Improvements in or relating to thermionic valve circuits
IPC: H03F3/52
Filed: 1939-09-28
Abstract: 549,484. Valve circuits. TELEFONAKTIEBOLAGET L. M. ERICSSON. Sept. 28, 1939, No. 26825. Convention date, Oct. 26, 1938. [Class 40 (v)] Grid bias, particularly. for a modulator, is obtained from a resistance D, such as a copper oxide rectifier, that has a substantially constant voltage with variable current characteristic. The grid bias thus remains constant irrespective of large anode current fluctuations.
Patent GB-1495909-A (GB)
Title: Method of contraception using spermicidal vaginal composition comprising 1,2-benzisothiazole derivatives
IPC: A61K31/425
Filed: 1976-06-28
Abstract: 1495909 Contraceptive spermicidal compositions PREPHAR PROSPECTION DE RECHERCHES PHARMACEUTIQUES SA 28 June 1976 [3 July 1975] 26883/76 Heading A5B In a method of contraception there is administered vaginally prior to coitus, a spermicidally effective amount of a 1, 2 - benzoisothiazole derivative of formula (I):- wherein X is oxygen or sulphur; Y is H, NO 2  halogen or a C 1-4  alkyl radical; and R is H, straight or branched C 1-6  alkyl or alkenyl optionally substituted by one or more hydroxyl tertiary amino and/or alkoxy groups; C 3-8  cycloaliphatic; aryl or aralkyl where the aryl group may be substituted by one or more halogen atoms, alkyl and/or alkoxy radicals; or an acyl group -COR' in which R' is C 1-4  alkyl or aryl. The compounds (I) may be administered in the form of compositions with conventional vaginally acceptable excipients, suitable forms including pessaries, creams, effervescent tablets, soluble tablets, and aerosol foaming compositions.
Patent GB-617131-A (GB)
Title: Foraminous sheet material and luminaires made therefrom
IPC: F21V11/00
Filed: 1946-09-06
Abstract: 617,131. Wire fabric. SIGHT LIGHT CORPORATION. Sept. 6, 1946, No. 26930. Convention date, Nov. 5, 1945. [Class 142 (iv)] [Also in Groups XI and XVIII] A foraminous light-transmitting sheet for signs or luminaires (see Groups XVIII . and XI) is woven from triangular-section wires 46, the apices 48 of the wires being arranged in the same direction.