baber/WOPTO huggingface dataset:
Patent GB-1344870-A (GB)
Title: Method and apparatus for making ceramic spheres
IPC: B28B1/00
Filed: 1971-06-18
Abstract: 1344870 Spheroidizing ceramic material COORS PORCELAIN CO 18 June 1971 [22 Sept 1970] 28649/71 Heading B5A [Also in Division C1] Ceramic spheres are made by forming a bed of finely powdered wax, depositing drops of ceramic slip on to the bed, drying the drops at least partially to set the spheres, separating the dried drops from the wax and firing them. Suitable materials for the slip are an aqueous slurry of a powdered alumina, (preferably comprising between 50 and 100% alumina), or zirconia together with such other ingredients  as clay, talc, barium carbonate and whiting and antifoam, wetting and dispersing agents, and a thickening agent, e.g. magnesium sulphate. The wax must have a high melting point, e.g. ethylene diamine bis-stearamide. The bed is deposited from a hopper 20 on to a moving belt, levelled off and drops of the slip are discharged from nozzles 48, dried by a radiant heater separated from the wax powder at 36, screened and fired, the separated wax powder being returned to the hopper. Specification 1,344,869 is referred to.
Patent GB-977982-A (GB)
Title: Electrical connector units for use with printed circuit boards
IPC: H01R12/72
Filed: 1961-07-06
Abstract: 977,982. Two-part couplings. W. S. CATOR. July 5, 1962 [July 6, 1961], No. 28657/63. Divided out of 977,981. Heading H2E. The subject-matter of this Specification is substantially the same as that described in Specification 977,981, but the claims are concerned with the construction of the contacts.
Patent GB-650292-A (GB)
Title: Improvements in or relating to clamping devices for electric cables
Inventor: LAITE WALTER THOMAS
IPC: H01R13/595
Filed: 1948-11-04
Abstract: 650,292. Two-part couplings. MINISTER OF SUPPLY. Nov. 4, 1948, No. 28717. [Class 38 (i)] A cable-end clamp comprises tubular housing members 1, 2, which receive a cable end 3, and clamping members 7 provided with cablegripping portions 9 and with end portions which engage the housings at flanges 5, 6, the engagement being such that when the clamp is constricted on the cable, axial movement between the clamp and the housings is produced, thereby compressing sealing washers 13, 14 interposed between the end of the housing members and the cable engaging portions of the clamp. The housings are furnished with flared ends 5, 6 which co-operate with similarly-shaped ends in the clamping members. Spacing washers 15, 16 in the clamp serve as abutments for the sealing washers and guide the clamping members 7 into co-operation as the screws 11, 12 are tightened. Serrations 9a on the cable gripping portions 9 may be formed to receive cables of different sizes within a desired range and there may be more than two clamping members 7, the screws then being replaced by an encircling band. The housing 2 may form part of a connector 4 of the kind described in Specification 587,643.
Patent GB-646193-A (GB)
Title: Improvements in or relating to apparatus for mixing material
IPC: B29B7/18
Filed: 1946-08-29
Abstract: 646,193. Mixing-machines. ARMSTRONG CORK CO. Aug. 29, 1946, No. 28830/49. Convention date, Oct. 31, 1945. Divided out of 646,130. [Class 86] A stirrer blade comprises a body portion having a pair of axially elongated oppositely extending radial wings each presenting a leading working surface which is convex, the convexity of the portions of said surfaces adjacent the outer edges decreasing progressively from the outer ends of the wings toward the inner ends. The two wings 85, 86 are each' given a helical twist longitudinally of the blade and are of different lengths. Fig. 3 shows a crosssection of the blade 85 hear the end and shows the convex leading surface 87, the convexity of which decreases longitudinally along both wings towards their joining plane, the maximum radius of the longer wing being greater than the shorter. The extreme outer tips 89 of the wings are substantially flat along their length to produce an intensive mulling action on the materials between the wing tip and the surface of the mixing chamber. The trailing surfaces of the wings are substantially radial and permit immediate release of material being mulled by the tip 89. The blade may be used in a mixing apparatus as described in Specification 646,130.
Patent GB-483387-A (GB)
Title: Improvements in automatic shuttle-changing looms for weaving
IPC: D03D45/20
Filed: 1936-10-23
Abstract: 483,387. Looms with automatic weft replenishment. COURTAULDS, Ltd., COTTERILL, E., and DEAN, C. A. Oct. 23, 1936, No. 28865. [Class 142 (iii)] Shuttle-changing mechanism for multi-shuttle looms with delayed action. On shortage of weft in a shuttle a rod 37 is not reciprocated by the sley and in consequence a pawl 41 is not lifted by an arm 40 on the rock-shaft 39. The pawl 41 and a second pawl 52 oscillated by a lever 44 from the bottom shaft 18 operate on two mutilated ratchet wheels 43, 46 on the same shaft as two cams 47, 48. When tho pawl 41 is not lifted it drives the wheels 43, 46 through one tooth space then the pawl 52 takes up the drive through, say, three teeth spaces corresponding to any desired number of picks. The cam 48 through levers &c. 49a and a rod 50 which moves along with the shuttle-box raises one or other rod 51, 51a, Fig. 6, to deliver a shuttle 8, 8a from one or other of the magazines 5 on to a platform 6. The other cam 47 pulls a catch 13 into engagement with a block 19 on a lever 14 oscillated by a cam on the bottom shaft 18. The catch 13 raises a lever 10 and, through the rod 9, the part A of the shuttle box, the part B and the swell 3 remaining stationary. The working shuttle then enters the lower box 2. The catch 13 through the levers 10, 22 also compresses a spring 27 in the coupling 24, and when the cam 33 on the top shaft 34 allows, this spring 27 advances the plunger 7 and forces the new shuttle into the upper box 1. The shuttle-box is then lowered into the position shown in Fig. 1, and the empty shuttle slides out of the lower box. Weft-feeler arrangements.-The weft feeler 54, Fig. 5, and its guide are linked to a roller 55 engaging a block 36 on the end of the rod 37. Normally, the block 36 is pushed back at every pick, but when weft shortage occurs the feeler 54 passes into the slotted pin spindle 58 and the block 36 is not moved.
Patent GB-308675-A (GB)
Title: Improvements in or relating to electro-magnetically-operated vehicle direction indicators
IPC: B60Q1/36
Filed: 1928-10-08
Abstract: 308,675. Schober, P., and Schober, R., (trading as Schober, R., [Firm of]), (Assignees of Teichgraber, F. K.). March 26, 1928, [Convention date]. Road-traffic signals on vehicles. -An electromagnetically-operated semaphore arm a for use as a vehicle signal is locked in home position by the engagement of a notch i in the core d with the abutmentpin b.
Patent GB-688329-A (GB)
Title: Improvements in electric motor reversing arrangements
IPC: H02P23/00
Filed: 1950-11-27
Abstract: 688,329. Control of two A.C. motors. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 27, 1950 [Dec. 3, 1949], No. 28968/50. Class 38 (iii) [Also in Group XIII] A refrigerator (see Group XIII) has a split-phase induction motor, with starting winding 15 and running winding 16, for drawing a compressor and an induction motor, having windings 13, 14, which drives a fan, means being provided for reversing the fan motor each time the compressor motor is stopped and started so as to minimise the collection of dust between the fins of a condenser which is cooled by the fan. The stopping and starting of the compressor is controlled by a temperature-responsive switch 20, the starting winding 15 of the compressor motor being disconnected at the proper speed by a relay 15a which is responsive to a fall of motor current. When the switch 20 is opened to stop the compressor, a capacitor 24 is connected in series with winding 13 the current through which leads that passing through the winding 14, the fan motor being driven in one direction (Fig 2). When the switch 20 is closed to operate the compressor and the relay 15a is opened at the end of the starting period, the winding 13 remains connected to the capacitor 24, but the winding 14 is connected across the starting winding 15 in which is induced a voltage from the running winding 16. The current in the winding 14 then leads that in the winding 13 and the fan motor is reversed (Fig. 3).
Patent GB-536229-A (GB)
Title: Improvements in or relating to grounded plate amplifiers
IPC: H03F3/54
Filed: 1939-10-31
Abstract: 536,229. Valve amplifying circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Oct. 31, 1939, No. 29093. Convention date, Nov. 15, 1938. [Class 40 (v)] .A push-pull valve amplifying circuit especially for high frequencies comprises two triodes 5, 7, Fig. 1, with the anodes 9, 11 grounded by a condenser 13 and supplied with voltage from a battery 15, the grids connected to inductors 23, 25 fed from the secondary of a transformer having a midpoint supplied with bias voltage by a battery 43, the cathodes connected to an inductor -in two sections 17, 19 grounded at the mid point 21, and the cathodes also connected by condensers 47, 49 to inductors 51, 53 connected at their other ends to the inner ends of the inductors 25, 23 to prevent self oscillations. In the preferred construction, the coupled inductors are in the form of linear conductors, the inductors 17, 19 being parallel tubes tuned to a quarter wave length by capacitance or by a connection adjustable lengthwise, and the other inductors being within the tubes. The whole is enclosed in a shield. In a modification, Fig. 3, the cathodes are directly heated and this necessitates two pairs of parallel tubes 57, 59 and 61, 63 arranged with the valves 5, 7 and the other devices in the shielding casing 29.
Patent GB-913875-A (GB)
Title: Improvements in or relating to electric circuit arrangements for operating two or more electric discharge lamps from an alternating current supply
Inventor: WILLIAMS CHARLES EDINGTON
IPC: H05B41/232
Filed: 1960-08-23
Abstract: 913,875. Supply systems for space-discharge apparatus. GENERAL ELECTRIC CO., Ltd. Aug. 22, 1961 [Aug. 23, 1960], No. 29109/60. Class 38 (4). A supply system for two gas-discharge lamps 6, 7, has the filament 5 of the lamp 6 and the filament 9 of the lamp 7 connected in a series circuit across an A.C. supply 1, 2, together with the primary winding 3 of a transformer 4 and a power factor correction capacitor 8, the filament 10 and the filament 11 being supplied respectively by secondary windings 12, 13 of the transformer 4, a ballast inductor 14 being connected between the filaments 10, 11. The capacitor 8 is arranged to increase the power factor to a figure greater than 0.7 lagging and the lamps are provided with starting electrodes 17. In another embodiment the lamps are arranged in parallel with individual ballast inductors. The system may be used to supply more than two lamps. Specification 730,024 is referred to.
Patent GB-486006-A (GB)
Title: Improvements in colour photography
IPC: G03C7/02
Filed: 1936-10-27
Abstract: 486,006. Photographic bleach - out processes. WHEATLEY, C. W. G., and WHEATLEY, C. C. H. Oct. 27, 1936, Nos. 29127/36 and 6729/37. [Class 98 (ii)] In a bleach-out process, a dye or mixture of dyes is applied to a paper or other support together with an accelerating agent comprising one or more oxides or salts of chromium molybdenum, tungsten, or uranium. Preferably, an acid such as boric, citric, lactic, oxalic, salicylic, or tartaric acid is included in the layer. A suitable compound is oxal-molybdic acid, prepared by the action of oxalic acid on ammonium molybdate. Thiosinamine may also be included in the layer. Acid dyes are preferably used. Suitable dyes are those of the di- and tri-phenylmethane, azine, oxazine, thiazine, phthalein, and induline classes. In an example, a solution of collodion containing thiosinamine is prepared and mixed with a solution of oxalic acid in alcohol to which an aqueous solution of ammonium molybdate has been added. Paper, preferably barytacoated paper, is coated with this mixture and with a mixture of Aurine, Acid Fuchsin, and Brilliant Cresyl Blue to which an acid black dye may be added. The paper is exposed in a camera or under a colour print, and is then washed to remove the accelerating agent and treated with a solution of barium chloride and hydrobromic acid, and then with a mordanting solution of tannic acid and tartar emetic. In the case of basic dyes, a mixture of phospho-molybdic and phospho-tungstic acids may be used in addition or alternatively. Reference is made to applying the dyes in a regular pattern by mechanical printing.
Patent GB-1307147-A (GB)
Title: Conveying and display system
IPC: B07C3/20
Filed: 1971-06-22
Abstract: 1307147 Sorting letters by television NATIONAL CASH REGISTER CO 22 June 1971  [2 Oct 1970] 29167/71 Heading H4F  Remote control of the destinations of a succession of objects, e.g. letters 10-on a conveyer 13 is enabled by illuminating each letter when it enters a viewing station, such that a television camera 20 can view each letter in turn and send the video signal to selected respective channels on a recording medium 32, the recorded signals being fed in parallel to respective monitor displays 34 viewed by operators who, by means of key boards 36, direct the respective letters to their destinations. Each letter has its trailing edge detected by a light source 14, photo diode 16 and detector station 12, the resulting signal being fed to a control unit where it causes, after a prescribed delay (such that the letter is now passing the camera) the operation of flash lamps 22. The duration of the flash is such that a two field interlaced-picture can be taken by the camera. Each field is recorded on a single track of the recording medium 32-e.g. a magnetic drum, the two adjacent tracks containing the recordings of the two fields being termed, "a channel". Due to the rapid fade of the charge image on the vidicon target, the second field. signal has to be boosted to make it equal to the first. This may be done by: (a) operating with low beam current for the first field and high beam current for the second field, (b) increasing the average D.C. voltage level of the second field to equalize the brightnesses; (c) increasing the gain of the video amplifier during the second field. The video signal is converted to an f.m. modulation at 26 and is directed to the correct channel track by track selector 27 and control unit 18. The track number and time of recording is recorded in a respective sector of a sector memory track on the drum 32. The recorded video signals are read out as selected by unit 30 and demodulated in units 33. The demodulated signals are fed via directing means 35 to respective display monitors 34. The outputs of the keyboards 36 are fed to a channel director 28, for recording on the respective sector of the sector memory track, and direction to the letter sorting mechanism. Direction of a letter enables the channel to be cleared for the recording of the next letter image. The recording which has been longest on the drum, is next fed to the now unused monitor. Clock signals, from which the camera and monitor seam signals are derived, are recorded on a track of the drum.
Patent GB-453031-A (GB)
Title: Improvements in or relating to trusses
IPC: A61F5/26
Filed: 1935-10-23
Abstract: 453,031. Trusses. PEASE, B. F., 1020, South High Street, Akron, Ohio, U.S.A. Oct. 23, 1935, No. 29242. [Class 81 (ii)] In a truss of the type in which a spring frame having back pads encircles the body of the wearer extensions are provided on the back pads which extensions are inwardly offset from the outer plane of the pads and are connected by a connecting strip. The spring frame member 5 on which the truss pads are mounted has at its rear ends back pads 8 and has attached thereto, by screws 10, angled or offset plates 7 to one of which is secured a strip 18 having a socket 18<a>, while the other carries a counterpart stud 12. The frame, pads and extensions are covered by material e.g., leather, 9, 16.
Patent GB-394205-A (GB)
Title: Improvements in and relating to transformers
IPC: H01F38/30
Filed: 1932-10-19
Abstract: 394,205. Current transformers. INTERNATIONAL GENERAL ELECTRIC CO., Inc., 120, Broadway, New York, U.S.A. (Assignees of Allgemeine Elektricitõts-Ges.; 2, Friedrich Karl-Ufer, Berlin.) Oct. 19, 1932, No. 29255. Convention date, Oct. 19, 1931. [Class 38 (ii).] In a transformer having a high-voltage winding e mounted on a core d within a bushing insulator b, and a low-voltage winding f surrounding the high-voltage winding, the production of short-circuit or eddy currents in the mounting flange c of the insulator is avoided by providing between the winding f and the flange a number of laminated cores g arranged parallel to the axis of the bushing and extending beyond the limits of the flange. The winding f and cores g may be mounted in an earthed electrode h, which is preferably made of nonconducting material provided with a conducting coating of high resistance material. Specification 295,502, [Class 38 (ii), Electric currents, Converting &c.], is referred to.
Patent GB-360837-A (GB)
Title: Improvements in electric controller systems for printing presses
IPC: H02P5/68
Filed: 1930-05-09
Abstract: 360,837. Master control of several D.C. motors. CLINE, A. J., 111, West Washington Street, Chicago, U.S.A. May 9, 1930, No. 29261/31. Divided on 360,445. Drawings to Specification. [Class 38 (iii).] Field and armature control ; varying E.M.F.; non- regenerative braking.-The subject-matter described is the same as that described in Specification 360,445, but the claims relate especially to the operation of a printing press on high and low voltage circuits. Specification 340,228 also is referred to.
Patent GB-174166-A (GB)
Title: Improvements in carburetters
IPC: F02M7/06
Filed: 1920-10-16
Abstract: 174,166. Binks (1920), Ltd., C., Binks, C., Binks, H., and Binks, C. L. Oct. 16, 1920. Spray carburettors.-A carburettor with a pilot or auxiliary jet C is provided with a main nozzle consisting of an unrestricted tube H, the inlet f to which is restricted by a needle valve G. The fuel that accumulates in the tube H during standing and slow-running provides a reserve of fuel for starting and accelerating. According to the Provisional Specification, instead of, or in addition to, the needle valve, the main nozzle may be made longer still, or may be made in the form of a coil.
Patent GB-1372984-A (GB)
Title: Machine tool with power draw bolt
IPC: B23B31/26
Filed: 1973-06-20
Abstract: 1372984 Draw-bar apparatus DEVLIEG MACHINE CO 20 June 1973 [1 Sept 1972] 29322/73 Heading B3T In a machine tool having a draw-bar tool clamping means within the tool spindle 14, the tool is secured in the spindle by threaded engagement between the draw-bar 20 and tool carrier 18 and is clamped solely by an applied axial tension to the draw-bar. The inner end 30 of the draw-bar 20 has one part 34 of a dogtype clutch which is axially engageable with another part 44 mounted on a splined connection to a motor drive shaft 50 of an hydraulic motor 54. Slidably mounted on the draw-bar and adjacent the clutch part 34. is a sleeve member 92 with a conical face 88 which with a thrust ring 86 forms a one sided tapered groove. Surrounding this end of the spindle 14 is a slidable sleeve member 76 with a part tapered internal bore which co-operates with balls 84 within the tapered groove. In operation a tool is located in the socket 18 of the spindle 14, motor 54 is actuated and the clutch part 44 is displaced to engage co-operating part 34 by way of a fluid actuated rod 102 which displaces the yoke 100 to which clutch part 44 is attached. The engagement of the clutch members to rotate the drawbar 20 effects screwing of the tool carrier on to the threaded end 22 of the draw-bar. When the threading action is complete the clutch parts are disengaged by displacement of the control rod 102 in the opposite direction. Simultaneously, a yoke member 98 attached to shaft 108 which also carries clutch yoke 100, is displaced, which stops the operation of the motor 54 but slides the sleeve 76 along the spindle and displaces by wedging action the balls 84 radially inwardly into the groove to apply a solely axial force to the draw-bar to securely clamp the tool carrier 16 in the spindle socket 18. The displacement of the shaft 108 and the clutch part 34 to which an operating shaft 68 is attached, causes operation of micro-switches to control the operation of the motor 54 and fluid admission to actuate the control shaft 102.
Patent GB-1514314-A (GB)
Title: Synchronous machines
IPC: H02K19/26
Filed: 1975-07-11
Abstract: 1514314 Dynamo-electric machines SIEMENS AG 11 July 1975 [12 July 1974] 29330/75 Heading H2A In a synchronous machine having a quadrature axis field damper arrangement, the ratio K of the direct axis transient time constant to the quadrature axis time constant is such that hunting and oscillation effects are substantially suppressed in operation of the machine with a converter. K takes a value in the range 1 to 3. This is achieved, for example, by using low resistance damper bars 7, in the rotor poles, interconnected by end rings 7b. Alternatively a high inductance damper winding may be used. Fig. 10 shows quadrature axis damping coils 13 encircling the rotor core. In a modification, Fig. 11a (not shown) the coils are interconnected at the ends of the rotor by end conductors wrapped around a ferromagnetic ring (15). The exciter winding may be interconnected in such a way as to provide a quadrature axis damping arrangement and a choke 11 may be added to increase the quadrature axis inductance.
Patent GB-445586-A (GB)
Title: Improvements relating to aircraft instruments
IPC: B64D43/00
Filed: 1934-10-13
Abstract: 445,586. Inclinometers for aircraft. SHEEN, W. C., Officers' Mess, Royal Air Force, Netheravon, Wiltshire. Oct. 13, 1934, No. 29358. [Classes 97 (ii) and 97 (iii)] A rate-of-turn indicator and a pendulousattitude indicator differentially control a third indicator, e.g. a model aeroplane. In the form shown in Fig. 2, 3 is a model pivoted on a spindle 4 and having a crank arm 5, which is pivoted to the middle of a rocker lever 7. The ends of the latter are connected by links 8, 9 to the pointer 1 of a rate of turn indicator and the pointer 2 of a bank indicator respectively. In a modification, Fig. 5, a gyroscopic turn indicator 15 drives the internally toothed annulus 12 of a differential gear. The sun wheel 20 on shaft 19 is driven by slotted lever 21 and crank-pin 22 from an encased pendulum 23. The planet wheels 24 are mounted in a cage 25 rotatable on the shaft 19 and carrying a model 27 by the arm 26. A pointer 18 is mounted on shaft 19 and a pointer 11 carried by the annulus 12. In a further modification an indicator may be differentially controlled by a pendulous pitch indicator and a rate of pitch indicator. Specifications 340,327 and 340,328 are referred to.
Patent GB-617014-A (GB)
Title: Improvements in or relating to combination tables and chairs
IPC: A47B3/14
Filed: 1946-10-02
Abstract: 617,014. Collapsable combination table and seat. KERNICK, T. R. Oct. 2, 1946, No. 29360. [Class 52 (iii)] A collapsable combination table and chair comprises a seat member 11 fixed to, and a pair of legs 12 pivotally attached to one end of a pair of longitudinal frame members 10 together with a table top 17 pivotally supported by a pair of links 18 on the other end of the frame members 10 said links being extended to provide a pair of pivoted front legs 14 as shown. The table top is provided with runners 21 to which the links 18 and a further pair of parallel rear supporting links 19 are pivoted. The pivot points are provided with distance pieces and the arrangement is such that in the collapsed position the runners 21, the links 19 and the rear legs 12 lie adjacent the inner faces of the members 10 while the front links 18 and the front legs lie adjacent the outer faces. Transverse bars 13, 16 may be attached to the legs 12, 14 respectively to prevent excess rotation of the legs from the collapsed to the supporting positions. A collapsable backrest may be provided.