baber/WOPTO huggingface dataset:
Patent GB-986618-A (GB)
Title: Improvements in or relating to permanent magnets containing an intermetallic compound
IPC: C01B25/06
Filed: 1961-08-25
Abstract: Hexagonal crystal phase compounds of (Fe, Co)2P containing 20-22% phosphorus, not more than 32% cobalt and not more than 40 parts of cobalt to each 60 parts of iron, in the form of discrete particles having in themselves permanent magnetic properties, are used as permanent magnets.  The compounds (Fe, Co)2P may be prepared by (1) forming an alloy from the elements Fe, Co and P, making a casting therefrom and lixiviating with acid, for example H2SO4 or HNO3 to obtain discrete particles (2) adding iron and cobalt to a molten bath of phosphor copper, solidifying and lixiviating or (3) passing phosphorus vapour over cobalt-iron powder.  The lixiviation may be applied to particles obtained by grinding the casting.  In an example iron and cobalt powder were added to a melt of phosphor-copper (90% of Cu, 10% of P) in a chamotte crucible to obtain a composition of 95% phosphor-copper, 4.25% iron and 0.75% cobalt, poured into a steel mould and lixiviated with NHO3 at 80 DEG  C.ALSO:A permanent magnet comprising discrete particles of alloy having in themselves permanent magnetic properties, wherein in each particle the said properties are provided by a hexagonal crystal phase of (Fe,Co)2P alloy wherein the phosphorus content of the alloy lies between 20% and 22% by weight, wherein the cobalt content of the alloy is not more than 32% by weight and wherein the alloy contains not more than 40 parts by weight of cobalt to each 60 parts by weight of iron.  The compounds (Fe,Co)2P may be prepared by (1) forming an alloy from the elements Fe, Co and P, making a casting from the alloy and then lixiviating the casting with acid, for example H2SO4 or HNO3 to obtain discrete alloy particles (2) adding iron and cobalt to a molten bath of phosphor copper, solidifying and lixiviating, or (3) phosphorus vapour passed over cobalt-iron powder.  The lixiviation process may be applied to particles obtained by grinding the casting. A permanent anisotropic magnet is made by pressing the powder in a magnetic field at room temperature.  In an example iron and cobalt powder were added to a melt of phosphor-copper (90% of Cu, 10% of P) in a chamotte crucible to obtain a composition of 95% phosphor-copper and 4.25% iron and 0.75% cobalt, poured into a steel mould and lixiviated with dilute HNO3 whilst heating at 80  DEG C.
Patent GB-633036-A (GB)
Title: Improvements in and relating to electric fluorescent lighting systems
IPC: H05B41/18
Filed: 1947-11-20
Abstract: 633,036. Supply systems for space discharge lamps. PESTARINI, J. M. Nov. 20, 1947, No. 30805. Convention date, Nov. 20, 1946. [Class 38 (iv)] [Also in Group XXXVII] In a D.C. discharge lamp lighting system a metadyne 10 of the generator or transformer type is included in the lamp circuit during the starting period to provide the high starting voltage required, by switching means 14, which, in the arrangement shown, connects the lamp 7 direct across the secondary brushes b, d of the machine and in an alternative arrangement (Figs. 4 and 5, not shown) connects the machine in series with the supply leads. The switching means may include contacts 12 or 13 or both for controlling respectively the circuit between the primary brushes a, c, and the stator winding 11 circuit to de-energize the machine before change-over is effected. To afford automatic reduction of the primary current when the secondary circuit is operated a further winding (Fig. 4, not shown) may be connected between the primary brushes. A polarity reversing switch 1-6 may be inserted in the supply leads and operated periodically to avoid lamp striation. In cases where the normal supply is derived from a generator forming part of the system the metadyne may be coupled thereto. Two forms of manually-operated starting switches, which provide the correct sequence and starting period are described (see Group XXXVII).
Patent GB-865437-A (GB)
Title: Improvements in or relating to electrolytic capacitors
IPC: H01G9/042
Filed: 1956-10-10
Abstract: 865,437. Electrolytic capacitors. SPORING, P. A., and TELEGRAPH CONDENSER CO. Ltd. Oct. 8,1957 [Oct. 10, 1956], No. 30837/56. Class 37. A dry rolled electrolytic capacitor comprises a metallic negative foil, other than aluminium nickel alloy, which does not exhibit electrolytic valve action when in contact with the capacitor electrolyte, and upon the surface of which there is an oxide film of a thickness such that the capacity per square inch between the foil and the capacitor electrolyte is not less than 30ÁF. An etched aluminium anode foil is wound with a tin or lead cathode foil, the foils being'separated by paper impregnated with glycol-ammonium borate electrolyte. The cathode foil is previously tested for the thickness of oxide coating by immersing two pieces of the foil, each one square inch, in the capacitor electrolyte to ascertain that the capacity between the foils.is not less than 15 ÁF.
Patent GB-691472-A (GB)
Title: Improvements in or relating to the synchronisation of photographic film and sound records
IPC: G03B31/04
Filed: 1949-12-01
Abstract: 691,472. Combined sound and picture apparatus. THERMIONIC PRODUCTS, Ltd. (Brush Development Co.). Dec. 1, 1949. No. 30892/49. Class 40 (ii). To synchronise the working of moving picture apparatus and magnetic sounc reproducing apparatus, flickering light frorr the shutter 17 is reflected from the screer 20 and a mirror 40 onto the magnetic tape 36 which has spaced indicia. The indicia are so spaced that, due to the stroboscopi( effect of the flickering shutter light, they appear stationary when the two appara tuses are working synchronously. The speec of the tape is adjusted by a control knob 35 or alternatively the speed of the film drive motor 7 is varied, until the indicia appeal stationary. In a modification the indicia may be on the drive mechanism for the tape, e.g. the capstan 33. Specificatior 628,898 is referred to.
Patent GB-814653-A (GB)
Title: Improvements in or relating to electric primary cells
Inventor: MCCALLUM JOHN
IPC: H01M6/04
Filed: 1955-10-28
Abstract: The negative electrode of a primary cell (see Group XXXVI) is formed of an alloy comprising at least 50 atomic per cent titanium.  The alloy should be single-phased and homogeneous and the composition of the alloy is preferably within 20 per cent of the composition determined by the presence of at least five valence electrons in the alloy for each titanium atom.  Groups V, VI and VIII elements may be incorporated in the alloy to increase the shelf life of the cell and Group II and III elements to improve the discharge characteristics. Preferred amounts by weight of these additions are: Mo-29 per cent; V-13 per cent; Cr-18 per cent; Co-29 per cent; Ni-38 per cent; Nb-24 per cent; Ta-35 per cent; W-39 per cent; Be less than 9 per cent; Al less than 25 per cent; B less than 10 per cent.  Alloys having other amounts of these alloying elements are, however, referred to in the Specification, e.g. Mo as high as 50 per cent and Al as high as 60 per cent.
Patent GB-1484022-A (GB)
Title: Roller arrangements for levelling surfaces
IPC: A01B29/00
Filed: 1975-07-14
Abstract: 1484022 Rollers SISIS EQUIPMENT (MACCLESFIELD) Ltd 14 July 1975 [12 July 1974] 30992/74 Heading A1B A roller arrangement for levelling surfaces comprises a frame 10 including rigidly connected side plates 12, a plurality of rollers journalled by and extending between the side plates 12, a leading and trailing roller 38, 40 being rotatable about horizontal axes fixed relative to the plates 12, and a centre roller 42 being rotatable about a horizontal axis adjustable vertically relative to the plates 12. The vertical adjustment is effected by means of a cam pivoted about the axis of the centre roller 42 and in operative association with an abutment fixed relative to the side plates. The cam preferably comprises a cam plate 50 including a curved slot 58 in which the abutment e.g. pin 60 engages. Pivoting of the handle 54 attached to the cam plate causes the pin 60 to move in the slot 58 to move shaft 46 of the centre roller 42 in a slot 48 in the side plate 12. In one position of the cam, the lower peripheries of the rollers 38, 40, 42 are in horizontal alignment, and in the other position of the cam the rollers 38, 40 are elevated relative to the centre roller 42. In an alternative arrangement, the cam includes a pin and the abutment means a curved surface with which the pin runs in contact. The frame 10 also includes supports 26, 28 pivoted to transverse members 16, 18 and including means for attachment to the threepoint linkage 36 of a tractor. The support 28 includes a slot at its pivoting point 24 whereby during lifting, by means of the linkage 36, the roller arrangement is maintained substantially horizontal.
Patent GB-1067779-A (GB)
Title: Probe transducer
IPC: G01L9/00
Filed: 1964-08-04
Abstract: 1,067,779. Measuring pressure electrically. NORTH AMERICAN AVIATION Inc. Aug. 4, 1964 (Oct. 2, 1963], No. 31015/64. Heading G1N. Compressive stress produced in a rod 28, Fig. 1, forming part of a probe 2, by a fluid pressure applied to its end 38 is measured by semi-conductor strain gauges 22 mounted on a portion of the rod having a reduced cross-section, the gauges being arranged in a bridge so as to compensate for temperature dependent errors in the output signals of the gauges. For use in a rocket engine thrust chamber, the probe may be replaceable and be of a material which erodes at the same rate as does the chamber wall to ensure a flush surface at 4, thereby avoiding hot spots, etc. In one embodiment Fig. 3 (not shown) two p-type semi-conductor gauges form one pair of opposite bridge arms, and two n-type form  the other pair, the two types giving opposite changes in resistance for a given strain change,  and all the gauges having matched thermal resistance coefficients. Further, Fig. 4 (not shown) correction for resistance changes produced by differences in the thermal expansions of the p-type gauges and of the rod is made by having the two p-type gauges in one pair of arms, and two straininsensitive gauges in the other pair. The thermal coefficient of resistance of the insensitive gauges is chosen to produce a resistance change therein which is equal to the difference between the resistance changes produced in the p-type gauges by the said differential expansion and by their own thermal coefficient of resistance. A third embodiment Fig. 5 (not shown) has one p-type gauge in each arm, one pair being mounted parallel to the rod and the other pair being mounted transverse to it, so that the pairs are respectively axially compressed and extended, the gauges all having matched thermal resistive coefficients which therefore cancel, and also having strain-resistance coefficients of the same sign (all being p-type) so that errors due to the above stated difference in thermal expansions also cancel. The bridge supply is a constant current source so that by means of a resistor across it (R sb , Fig. 2, not shown) the sensitivity of the bridge may be adjusted. The transducer assembly may be cooled by ducts 40, 42, etc.
Patent GB-779573-A (GB)
Title: Improvements in or relating to sintered metal
IPC: C22C32/00
Filed: 1955-10-31
Abstract: An aluminium alloy contains 4 per cent silicon and 1.1 per cent cadmium, with or without 2 to 5 per cent aluminium oxide.  The quaternary alloy forms part of a mixture which is sintered for use as piston rings, tappets, gears, valve stem guides, bearings and bearing surfaces such as camshaft thrust bearing plates.
Patent GB-941342-A (GB)
Title: Improvements in or relating to a turbocharged engine power plant
IPC: F01D17/16
Filed: 1961-08-29
Abstract: 941,342. Shafts; bearings; controlling boundary layer flow. R. BIRMANN. Aug. 29, 1961, No. 31058/61. Headings F2A, F2R and F2U. [Also in Division F1] In the turbine-driven supercharger shown in Fig. 1, shaft extensions 70, 72 form the inner races of bearings 78, 98 and are carried in slightly tapered bores 74, 76 in the main shaft. Increasing shaft deflection causes the point of contact of each shaft extension with the corresponding tapered bore to shift outwardly, thereby rapidly increasing the deflection stiffness of the shaft. In addition, the bearings are flexibly mounted in polygonal leaf spring elements 80, 100. These two features render the rotor assembly self-balancing and eliminate critical speeds and other vibration phenomena. The turbine rotor blades 57, Fig. 7, are provided with bulbous inlet edges 120 so that the area of the flow passage between adjacent blades decreases in the direction of flow, the decrease being most rapid at the inlet edges. The resultant increase in relative velocity through the rotor 56 produces a pressure gradient which counteracts the adverse pressure gradient caused by centrifugal forces and tending to cause rapid growth of boundary layers. Specifications 941,343 and 941,344 are referred to.
Patent GB-337573-A (GB)
Title: Lubricating systems for gasoline dispensing pumps
IPC: B67D7/84
Filed: 1929-10-12
Abstract: 337,573. Eickmeyer, E. E. Oct. 12, 1929. Force-feed lubricating. - In a gasoline filling- station pump comprising an operating-handle shaft 31 coupled to a shaft 40 geared to a shaft 43 actuating a dial shaft 51 and a rack 5 secured to the pump piston rod 3, oil is supplied to the shaft bearings and to the packing gland 22 of the rod 3 by a manually-operated pump 12 arranged within the enclosing casing of the pump and which is accessible when the door 62, Fig. 2, is opened. The oil pump cylinder 12 is integral with a jaw 9 adapted to be clamped around the gasoline delivery pipe 8 by a hinged jaw 10. The pump draws from a reservoir 56 and delivers past a non-return valve 61 into a chamber 13 in the jaw 9. The piston 57 is normally pressed outwards by a spring 60 and may be forced inwards for delivery of oil by pressure on a knob 59 carried by the piston rod 58. From the chamber 13 a pipe 19 leads to a chamber 20 in the gland 22, pipes 16, 17 lead to the bearings of the dial shaft 51, a pipe 15 leads to the interior of a guide roller (not shown) for the rack, a pipe 14 leads to channels 47, 38, 37 supplying the bearings of the coupled shafts 31, 40, and a branch 80 from the pipe 15 leads to channels 48, 44 supplying the bearings of the shaft 43.
Patent GB-1518973-A (GB)
Title: Electric circuits incorporating laddics
IPC: G11C11/06
Filed: 1975-07-24
Abstract: 1518973 Laddic circuits UNITED KINGDOM ATOMIC ENERGY AUTHORITY 20 July 1976 [24 July 1975 2 Dec 1975] 31063/75 Heading H3B The output winding W o  of a first laddic L1 is connected between earth and the base of an emitter follower T2 whose output impedance restricts the rise and fall rates of the mmf created by the reset winding WR of a second laddic L2, thereby preventing that lattic switching in error in response to decay of the magnetization in the laddic L1 under fault conditions in the laddic L1 itself as opposed to proper switching occasioned by absence of current in control winding W c  under fault conditions in a circuit to which W c  is connected. Extension of W o  to W x  partially cancels decay currents.
Patent GB-767510-A (GB)
Title: Improvements in or relating to alarm circuits for use in telemetering systems
Inventor: SMITH STANLEY COLIN
IPC: G08C19/26
Filed: 1953-11-11
Abstract: 767,510. Telemetering. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd. Aug. 24, 1954 [Nov. 11, 1953], No. 31234/53. Class 40 (1).  In a circuit for giving an alarm when the value of a variable represented by the rate of received impulses is abnormal, the impulses are repeated by a relay A to a time-constant circuit C1, R2 which is connected between impulses to a capacitor C2 determining the value of negative bias applied to grid 1. Normally the valve is paralysed between impulses by a negative voltage on grid 3, but after a prolonged absence of impulses, the anode relay is energized by the grid 2 current. During each impulse, the paralysing bias is removed and if a sufficient period has elapsed since the previous impulse, B receives energizing current via the anode. During each subsequent interval, B remains locked up. If the impulses are too rapid the relay falls, since its locking current is broken during the impulse and the negative charge on C2 has not had time to leak away. In the case in which an alarm is given when the impulses are too slow, the alarm circuit is closed over a front contact of B which is prevented from operating by the normal impulse rate.
Patent GB-967060-A (GB)
Title: Improvements in and relating to display devices
IPC: G09F13/00
Filed: 1963-08-08
Abstract: 967, 060. Illuminated signs. J. H. JORDAN and K. W. YOUNGMAN. Aug. 8, 1963, No. 31289/63. Heading G5C. A display device comprises a rotatable helical mask 6 mounted between a screen 10 (Fig. 2) and elongated light source(s) 3, the axis of the mask being parallel to that of the light source(s), so that rotation of the mask causes movement of illuminated parts on the screen. The mask may comprise a strip of opaque or transluscent material such as paper, twisted axially and threaded on a shaft 4 (Fig. 3) or helical opaque area(s) painted on a transparent or transluscent cylinder (Fig. 4, not shown), of glass of plastic. The light source(s) may be strip filament or fluorescent tubes or incandescent lamps arranged in a row. In Fig. 2 the shaft 4 carrying the mask 6 is turned by a motor 8 through rollers or gear wheels (Fig. 1, not shown), and the screen 10 is mounted on the casing 1 and illuminated through a slot 2, the casing having a non- reflecting internal finish. The screen 10 has a plurality of relatively inclined reflecting facets combined with a painted or printed picture, giving the illusion of movement as the mask is rotated. The screen may be aluminium.
Patent GB-193169-A (GB)
Title: An improved casing for clinical thermometer
IPC: G01K1/08
Filed: 1921-11-23
Abstract: 193,169. Greeley, J. T. Nov. 23, 1921. Thermometers. - An antiseptic casing for clinical thermometers comprises a metal tube 13 containing a glass tube 12 within which is slidably disposed a tubular member 19 of rubber &c. the lower end 20 of which acts as a seating to a valve 21 which is urged upwards by the spring 23 so as to trap the antiseptic in the lower part of the case when the thermometer 18 is withdrawn. The upper part 14 of the tube 13 projects beyond the tube 12 and is internally threaded for engagement, by a cap 15 which prevents removal of the tubes 12, 19. In the form shown the cap has a threaded aperture engaged by the threaded upper end 17 of the thermometer. The valve 21 is provided with a recessed portion 22 engaging the tip of the thermometer. The spring 23 is sufficifently strong to push the tube 19 upwards, Fig. 3, to facilitate its removal. In a modification the cap 15 is closed and bears on the upper end of the thermometer.
Patent GB-283567-A (GB)
Title: Improvements in hoods for motor vehicles
IPC: B60J7/06
Filed: 1927-11-22
Abstract: 283,567. Ramseier, F., Streun, F., and Jenzer, J., (trading as Ramseier, Streun, et Cie). Jan. 14, 1927, [Convention date]. Hoods.-In motor vehicle hoods of the kind the hoop sticks are guided in grooves in rails and are operated by an endless cable &c., the loop-sticks 5 are provided with cylindrical bearing blocks 7 or feet adapted to slide in split tubular guides 3 carried by the side frames 2 of the vehicle, and the blocks 7 are provided with apertures through which the endless cable 8 passes. The cable is secured to the front hoop sticks and passes over a drum 10 situated under the rear seat and over a roller situated at the windscreen. The rear of the hook is supported by pivoted pillars 16 and pivoted stays 20, the pillars 16 being provided with springs 18 to assist them being kept in upright position. The guide rails curve downwardly at the rear as shown.
Patent GB-262600-A (GB)
Title: Improvements relating to weighing machines
IPC: G01G19/00
Filed: 1925-12-15
Abstract: 262,600. Salter & Co., Ltd., G., and Bache, T. W. Dec. 15, 1925. Showcases.-In a weighing machine a portion of the front casing is glazed to form a showcase. The frame, which supports the weight-indicating mechanism, comprises vertical corner member 4, 5. the members 5 being shaped to form a recess 6 into which a glazed door 7 fits, and to provide grooves for the glass sides 9. The hinges of the door are let into one of the vertical members 5 and are attached therein by screws passing into blocks disposed in the grooved portion of the vertical member. One or more glass shelves 21, each in two portions to facilitate removal, are arranged within the case. A mirror 12 is arranged at the back of the case. The door may be arranged at the side or at the back, and may be replaced by a vertically sliding panel.
Patent GB-870895-A (GB)
Title: Improvements in gas purification
IPC: C01B3/02
Filed: 1959-09-16
Abstract: Carbon dioxide, hydrogen sulphide, sulphur dioxide, or carbon oxysulphide is removed from a gas by scrubbing the gas successively with two aqueous alkaline solutions which are withdrawn from their scrubbing zones and regenerated separately by a stream of a stripping medium which passes first through one solution and then through the other, the regenerated solutions being returned to their respective scrubbing zones.  Preferably the stripping medium passes first through the solution which has made second contact with the gas being treated.  In one embodiment of the invention the first solution contains potassium carbonate and the second solution mono-ethanolamine, the stripping medium being steam.  The regeneration may be effected in two separate regeneration vessels or in one vessel divided into an upper and a lower zone, one solution being supplied to and withdrawn from each zone.
Patent GB-835438-A (GB)
Title: Improvements in or relating to detachable handles
IPC: A47J45/10
Filed: 1956-10-17
Abstract: 835,438. Handles for utensils. LEE, B. Oct. 17, 1957 [Oct. 17, 1956], No. 31665/56. Class 66. A handle 11 has a formation for slidably engaging a part formed on the body of the pan and a withdrawable rod 13 which is spring-urged to engage a detent on the pan. A back plate 4 is riveted to, welded on, or cast integrally with the pan body 1 and from it upstands a part 5 forming a slot between it and the plate 4, the part 5 having an opening extending from its lower edge, Fig. 3 (not shown), for insertion of the handle, which has a plate 12 at one end. The end of the rod 13 is urged by a spring 14, housed in a recess 15, to co-operate with a detent 17 in the form of a hole extending through the plate 4. A ring 19 enables the rod 13 to be withdrawn for taking the handle off the pan. In a modification the rod 13 may be anchored within the handle and be partly flexible so that it may be operated by radial pressure from a button or cam. The receiving part on the pan may be recessed within the contour of the pan.