baber/WOPTO huggingface dataset:
Patent GB-1323233-A (GB)
Title: Transformer-rectifier device
IPC: H02M7/06
Filed: 1971-07-16
Abstract: 1323233 Transformers TOKYO SHIBAURA ELECTRIC CO Ltd 16 July 1971 [17 July 1970 (3)] 33521/71 Heading HIT [Also in Division H2]  A transformer-rectifier device comprises an oil-cooled polyphase transformer 10 located in a tank which has supported from one of its walls a plurality of oil-cooled rectifier units 23-28, each of which consists of a housing enclosing at least one semi-conductor rectifier element. As shown the transformer comprises a three phase primary winding 11, a pair of star-connected secondary windings 12, 13 connected to terminals 15 to 20 respectively, and an interphase reactor 21 connected between the neutral points of the secondary windings and having a centre tap connected to a negative output terminal 22. The rectifier units 23-28 are respectively connected to terminals 15 to 20 by bus-bars and comprise rectifier elements 29 to 34 (or a plurality of such elements connected in parallel) and anti-surge circuits 35 to 40. Rectifier output bus-bar 65a, Fig. 7, are all connected to a D.C. load bus-bars which in one embodiment (Fig. 11, not shown) is constituted by the pipe-lines provided for circulation of the coolant.
Patent GB-196648-A (GB)
Title: A contrivance to stop collisions on railways
IPC: B61L3/04
Filed: 1922-09-11
Abstract: 196,648. Okker, C. Sept. 11, 1922. Track-apparatus actuating signals on trains and for stopping trains.-A lever A, carried by the spindle of a valve which applies the brakes and cuts off steam is engaged by a track contact H comprising a counterweighted arm raised with the semaphore when the latter is in the danger position. A switch may be operated when the lever is used' on electric trains. An extension A<1> of the lever works in a ratcheted guide G and is reset by the driver.
Patent GB-1445771-A (GB)
Title: Ion-exchange
IPC: B01J47/10
Filed: 1974-07-30
Abstract: 1445771 Ion-exchange apparatus INSTITUTUL DE PROIECTARI TEHNOLOGICE PENTRU INDUSTRIA CHIMICA 30 July 1974 33535/74 Heading B1J A continuous-loop type of ion-exchange apparatus has a loading section in which the incoming liquid is treated, a conditioning section in which exhausted resin is rinsed and cooled, a regeneration section, a backwash section for the final rinse of regenerated resin, and a fresh resin storage section; the loading section includes a sampling device for analysing the treated liquid. Examples are given of the use of strong acid cationic resins and weak basic anionic resins; both may be used in series. In the embodiment shown, liquid to be treated enters at 11 and leaves at 12; a sample taken at 13 is analysed by analyser 14 which initiates regeneration when necessary. Washing and cooling water flows through conditioning section 3 from 18 to 19 and the conditioned resin is then regenerated in section 5, backwashed in section 7 and stored in section 10.
Patent GB-1274993-A (GB)
Title: Pplo vaccine preparation
Inventor: VELLA PHILIP PETER
IPC: A61K39/00
Filed: 1970-07-13
Abstract: 1,274,993. PPLO vaccines. MERCK & CO. Inc. 13 July, 1970 [16 July, 1969], No. 33847/ 70. Heading A5B. A PPLO vaccine is obtained by culturing a PPLO (organism), e.g. Mycoplasma pneunoniae at pH 7-8 in a growth medium containing 5-20% by volume of a fractionated calf serum (see below), washing, collecting, inactivating and concentrating the PPLO. The fractionated calf serum is obtained by one of two methods: a) by treating whole calf serum with 250-300 mg. of (NH 4 ) 2 SO 4 /ml. at pH 6-8, separating the precipitate, dialysing the supernatant against water and then against phosphate-buffered saline at pH 6.5-7.5 and sterilizing by filtration or, b) by heating whole calf serum at 65-70‹ for 30-60 mins., separating the useful mobile phase from the gelatinous phase and dialysing and filtering as in a) above.
Patent GB-881890-A (GB)
Title: Screw thread cutting process and automatic lathe for carrying out said process
IPC: B23G1/04
Filed: 1959-10-06
Abstract: 881,890. Automatic screw-cutting lathes. TAREX S.A. Oct. 6, 1959 [Nov. 28, 1958], No. 33857/59. Class 83 (3). An automatic screw-cutting lathe is adapted to cut, on a single workpiece a first thread and, after completion, to cut a second thread differing in pitch and diameter to the first thread. The work-spindle 2, Fig. 1, of the lathe is driven by a motor (not shown) at the required speed and gearing 5, 6, connects the spindle to a cross-shaft 7 for the cam-drive for threadcutting. A dog clutch 10, 11, controlled from cam 12 on the main cam-shaft connects the drive between shafts 7 and 7a at the commencement of each separate threaded portion, this drive being disconnected while the cutter changes from one thread to the other. Shaft 7a is connected to an output shaft 48 by two trains of changeable gears 46 and 90 respectively. The former drives shaft 48 when clutch parts 98, 98a are engaged and the latter operates the drive when clutch parts 99, 99a are engaged. The slidable part of the clutch is moved automatically to change the gear trains by a cam 100 on the cam-shaft 13 and lever mechanism. The drive from shaft 48 passes to a shaft 52 which is connected by universal joints and a splined connection to the shaft 64, Fig. 2. The latter drives a cross-shaft 56 and through worm-gearing 59, 60 a shaft 45, carrying the master cam 65 and the cam 66 for putting on the cut. The shaft 45 is supported on a slide 29 movable parallel to the workpiece and this slide is carried in turn by a cross-slide 26. The tool 9 and its holder 79 are secured to a plate 73 pivoted on axis X, X to a longitudinal slide 70 which receives the thread-cutting movements from the master-cam 65 through a follower 68. The plate 73 is moved by a rod 74 operated by a lever 75 and the cam 66. The two threads are cut in a complete rotation of the cam-shaft 13. Cams 32 and 37 are provided thereon to move respectively the cross-slide 26 in its approach and return movements, and the longitudinal slide 29 to bring the tool into the starting position for the second thread. All the parts are returned to the initial starting position for a new workpiece at the end of the cycle.
Patent GB-804472-A (GB)
Title: Improvements in or relating to transistor oscillators
Inventor: HOOPER DARYL EGBERT
IPC: H03B5/24
Filed: 1955-11-28
Abstract: 804,472. Transistor oscillator circuits. GENERAL ELECTRIC CO., Ltd. Oct. 30, 1956 [Nov. 28, 1955], No. 34035/55. Class 40 (6). A transistor oscillator comprises a negative feedback transistor amplifier giving a currentgain, and a frequency-sensitive resistance capacitance phase-shifting network connected between the output and input of the amplifier, the network having at the oscillation frequency an input impedance which is appreciably lower than the output impedance of the amplifier and an output impedance which is appreciably higher than the input impedance of the amplifier. The oscillator shown comprises a two-stage amplifier with the phase-shifting network 27, 28, 29, 30 in the regenerative feedback path and the negative feedback provided by resistor 25 and capacitor 26 to increase the output impedance of the amplifier and reduce its input impedance. Adjustment of the negative feedback by means of potentiometer 24 varies the ampli_ tude of oscillation. The Provisional Specification also describes a single stage oscillator (Fig. 5, not shown) and alternative resistance-capacitance phase shift networks (Figs. 2 and 3, not shown).
Patent GB-1433707-A (GB)
Title: Differential gear assembly
IPC: F16H48/08
Filed: 1974-08-01
Abstract: 1433707 Differential gear CATERPILLAR TRACTOR CO 1 Aug 1974 [8 Aug 1973] 34061/74 Heading F2D Bevel side-wheels 66 of a differential gear bear on the housing through thrust washers 94 which permit radial movement; and shims 96 for adjusting the axial spacing, and the pinions 76 are supported on flanged bushings 116 on a transverse shaft 106 mounted in housing bushings 108 which permit limited axial movement of the pinion assembly, the shaft 106 carrying means for adjusting the axial spacing between the pinions 76. In Fig. 2 this adjustment comprises screwing the flanged bushes 116 into a central sleeve 124 attached to the shaft 106 by a diametral pin 132 retained by a snap ring 138. In Fig. 3, not shown, the pinions are supported on taper roller bearings, the outer races of which are formed by the pinions, the inner races being carried on flanged sleeves, screwadjustably locked to the centre sleeve.
Patent GB-1293677-A (GB)
Title: A feed mechanism for feeding stationery having feed perforations
Inventor: SANDBACH PETER
IPC: B42D19/00
Filed: 1970-07-14
Abstract: 1293677 Autographic registers LAMSON PARAGON Ltd 2 July 1971 [14 July 1970] 34088/70 Heading B6A An autographic register feed means comprises a pivotable support plate 10, Fig. 4, mounted on a shaft 12 which is journalled in end webs 13 and actuated by a spring biased lever 82 for pivotal displacement to a phantom indicated position in which the leading edge of forms 5, Fig. 2, is fed through a transverse slot 7 by pins 8, 9 engaging feed perforations 24 in the forms 5. The pins 8, 9 are moulded of a plastics material and located resiliently in recesses 17 of the plate 10 by means of bifurcated cuneiform flanges 22 engaging the lower end of the recesses 17 after passing through a locating aperture 19. The pins are disposed below the concave surface of a pivotally associated feed bar 26 against which they are pressed by the springs 23 which also cause the pins to pass through the apertures 24 of the following forms 5 as the leading forms are withdrawn through the transverse slot 7. The leading forms are separated along lines of perforations. Reference has been directed by the Comptroller to Specification 1,254,913
Patent GB-1450761-A (GB)
Title: Radio interference apparatus
IPC: H04K3/00
Filed: 1961-09-22
Abstract: 1450761 Radio interference apparatus SIEMENS AG 22 Sept 1961 [22 Sept 1960] 34110/61 Heading H4L Radio interference apparatus comprises a search receiver for searching a frequency range for an enemy transmission and so arranged that, if an enemy transmission is detected at a particular frequency, a transmitter is automatically caused to transmit an interference frequency spectrum including that particular frequency. In Fig. 1 the frequency range to be disturbed is 20 Mcs/sec wide covering the range 220-240 Mcs/sec, the range being subdivided into 200 channels each 100 Kcs/sec wide. A search receiver comprises a high frequency section HF having an input filter 20 Mcs/sec wide, a mixer M, and a linear I.F. amplifier IF of 20 Mcs/sec bandwidth which is therefore such that substantially no combination frequencies can be produced by non-linearities. The receiver output is fed through a switch S1 to 200 filter units in parallel, of which one F is shown, each having a bandwidth of 100 Kcs/sec and together covering the whole range. Each filter F is connected to a selective amplifier V which produces a constant output which is rectified in unit G and used to control a relay switch or electronic channel switch SG which connects the filter to the IF stage of the transmitter section. Thus if a signal is received in any of the 200 channels, the corresponding filter or filters are connected to the transmitter by relays SC. During the transmitting phase switches S1, S2 and S3 are changed over to connect a noise generator R to the filters, to connect the local oscillator O to the transmitter mixer U instead of to the receiver, and to connect the H.F. amplifier HF of the transmitter to the power output amplifier SE. Thus jamming signals are broadcast on all the channels previously selected by the receiver. The switches S1-S3 may be controlled by a clock pulse generator T and the cycle may comprise 0.5 milliseconds search time, 8.5 milliseconds transmission time and 1 millisecond pause in which the receiver is switched off so that it does not receive reflections returning from any targets. The sequence may be made irregular to render countermeasures more difficult. The transmitter must deliver its maximum power independently of the number of channels being jammed, and for this purpose an automatic gain circuit AVC is included. A feedback line Gk operating through a phase shifter 4 may be provided to improve the linearity of the transmitter circuit and prevent the formation of combination frequencies. Switches SB allow selected channels to be kept free of interference by cutting out the corresponding filters. In modifications, Figs. 2 and 3 (not shown), the receiver and transmitter each comprise several mixer and IF stages. Thus the first IF stage of the receiver may feed ten filters each connected to a mixer and a second I.F. stage; each second I.F. stage may feed five filters each connected to a mixer and a third I.F. stage feeding 24 filters, thus giving 1200 interference channels.
Patent GB-1260838-A (GB)
Title: Machinery for the manufacture of filaments by fibrillation of synthetic organic thermoplastic polymers
Inventor: VERNON BRIAN JAMES
IPC: D01D5/42
Filed: 1968-04-10
Abstract: 1,260,838. Film fibrillation apparatus. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. 26 March, 1969 [10 April, 1968], No. 34172/71. Divided out of 1,260,836. Heading B5B. Apparatus suitable for the film fibrillation process of the parent Specification comprises a profiling unit A and means B for stretching uniaxially in the longitudinal direction a profiled film from said profiling unit and for subjecting the stretched film to a fibrillation treatment during and/or after the stretching treatment, said profiling unit comprising an element 3 having a non-yielding surface provided with a plurality of closely-spaced, parallel surface ridges each having a profile (illustrated to an enlarged scale in Fig. 2), in a plane normal to the longitudinal direction of the ridge, which includes inwardly directed sides leading to a peak and a further element 4 having a non-yielding surface, said further element forming a nip with said profiling element through which nip a film web or sheet-like mass of synthetic organic thermoplastic polymer can be passed. Preferably the apparatus includes a slot-die extruder 1 for producing a sheet-like mass of polymer, which may consist of a laminate of at least two polymers in superimposed relationship. The profiling unit A (Figs. 3 and 4, not shown) suitably comprises a pair of co-operating rotatable rollers 3, 4 having non-yielding surfaces, at least one of the rollers being adapted to be driven and at least one having a plurality of said surface ridges, and means, preferably pneumatic or hydraulic, for biasing said rollers towards one another to form a nip. In the preferred embodiment the stretching means includes a series of Godet rollers 6 and 8 separated by a heating oven 7 and the stretched film, which is already partially fibrillated by the stretching treatment, is completely fibrillated by treatment in means 9 which includes an elongated passage through which the stretched film is passed together with a current of air which is arranged to travel at a high velocity in the direction of the film. The profile of the ridges of the ridged roller 3 (or rollers 3 and 4) is preferably that of the Britsh Standard Whitworth screw thread and is such that the pitch of the ridges is within the range 0À003 to 0À05 inch and the depth of the troughs between adjacent ridges is within the range 0À002 to 0À02 inch.
Patent GB-999651-A (GB)
Title: A hermetically sealed rotary refrigerant compressor
IPC: F25B31/00
Filed: 1962-09-06
Abstract: 999,651. Rotary pumps. GENERAL ELECTRIC CO. Sept. 6, 1962 [Sept. 20, 1962(2)], No. 34175/62. Heading F1F. [Also in Division F4] In a hermetically sealed refrigerant compressor 1 having a rotor 6 eccentrically rotatable in a compression chamber 4, liquid refrigerant is intermittently injected into chamber 4 through a port 31 in one end wall 10 of the chamber to cool the compressed refrigerant gas. The port 31 is covered and uncovered by the end of rotor 6 during each rotation thereof and is located on the high pressure side of a vane 14 which is spring biased into contact with the rotor and divides chamber 4 into low and high pressure sides 4a and 4b respectively. The cooled compressed gas is discharged through a valve controlled port 18, a discharge chamber 19 and a port 25 and cools the motor 9 of the compressor before passing to the condenser of the refrigerating system. The port 31 is supplied with refrigerant by a capillary tube 36 which is coaxial with a tube 34, the latter receiving liquid from the condenser through a line 33. Tubes 34, 36 pass through an oil sump 24 in the bottom of the compressor casing, the heat of the oil causing a pocket of refrigerant vapour to form in the space 36a between the tubes. It is stated that this pocket serves to damp out vibrations caused by the intermittent covering and uncovering of port 31. The end of the hollow rotor drawing shaft 8 depends into sump 24, oil being drawn up the shaft and through radial apertures therein to lubricate bearings 10a and 11. Oil return passages 27, 28 are provided. The position of port 31 is so chosen that it is only uncovered when the gas pressure in chamber 4 is within 50 % to 95 % of the discharge pressure and in a modification (Fig. 5, not shown the port is coupled with respect to plate 10 so that the liquid refrigerant is injected into chamber 4 in a direction opposite to the direction of rotation of the rotor.
Patent GB-1236922-A (GB)
Title: Improvements in or relating to dividing strip assemblies for trays
Inventor: MITCHELL WILLIAM JOHN ALEXANDE
IPC: B65D25/04
Filed: 1967-07-25
Abstract: 1,236,922. Box partitions. INDUSTRIAL MOULDINGS (IRELAND) Ltd. 17 July, 1968 [25 July, 1967], No. 34179/67. Heading B8P. A filler for an egg box &c. consists of crisscross strips A-H of which one or some, G, as shown, or C and G. Fig. 3 (not shown), restrain the others by having tabs J, L (M, R) entering apertures in the box walls. The restraining member G has downwardly projecting slots engaging upwardly projecting slots in other members, and the member C in the Fig. 3 embodiment has an upwardly projecting slot for engagement by the member G. The strips can be metal or plastics, e.g. polypropylene.
Patent GB-1075238-A (GB)
Title: Improved apparatus for the production of cellulosic fibre webs
IPC: A61L15/16
Filed: 1964-08-21
Abstract: 1,075,238. Forming fibre webs. RUMBOLD A.B. Aug. 21, 1964 [Feb. 28, 1964], No. 34251/64. Heading D1N. A machine for producing fibre webs from pulp includes a defibrator comprising a rotatable toothed roll and a support ledge over which pulp web is fed, the ledge being made from a material that can be worked by the roll and which is milled or abraded by the roll so as to show grooves through which the teeth of the roll pass. The defribrating roll housed within a casing 1 is hollow and air is passed through to cool it. The air employed passes in circuit through a perforated plate 15 where fibres torn from the pulp web are drawn onto an airpermeable cellulose web 29 of width slightly more than twice that of a carrier belt 16 and of a duct 14 down which the fibres are drawn. Folding plates 32 connected to the plate 15 serve to turn the edges of the cellulose web in a manner to wrap around the fibres resting upon it. The support ledge against which the defibrating roll operates is preferably formed from a reinforced plastics material, such as a phenolformaldehyde resin reinforced with fabric. The edge of the ledge nearest the roll is milled by pressure of the ledge against the roll and this edge, over which the supply web of pulp is passed, is rounded to a degree which depends on the moisture content of the pulp web, stiffness and cohesion of the web being dependent on its moisture content.
Patent GB-390257-A (GB)
Title: Improvements in or relating to the conveyance and mixing of granular materials such as concrete or the like
IPC: B28C7/16
Filed: 1931-12-10
Abstract: 390,257. Mixing. BONGARDT, E., 40, Obere-Zahlbacherstrasse, Mainz, Germany. Dec. 10, 1931, No. 34270. [Class 86.] In a compressed-air conveyer system for conveying and mixing materials composed of constituents of different grain sizes and different specific weights, such as, for example, concrete, the air pressure does not exceed a maximum of 1 atmosphere, and the volume of air is at least a hundredfold that of the material conveyed. The constituents are supplied continuously and at a uniform speed to a preliminary mixer 5, Fig. 1, where they are mixed with a little water. The material falls from the mixer on to a feed screw 4 which compresses it into a plug within the conical part 9 of the casing. A scraper 10 at the end of the feed-screw shaft removes material from the face of the plug, and the scrapings falling in front of the nozzle 11 of the blower 1 are blown through the conduit 2 to a rotary final mixer. The water required for the final mixing is admitted through the pipe 7. In a modification, the conical end of the casing is replaced by a conical hopper 17, Fig. 2 made in two sections, the upper of which is movable and is urged downwards by a weight or springs acting through a lever 19 on a pin 20. Each part of the hopper may be movable. If the conduit 27 and connection 28 become blocked, a disc 23 on the shaft of the feed screw 16 is forced to the right, and through the pins 24 and linkage 25, 26 actuates stop mechanism for the screw and a signalling device. The lower part of the disc is pivoted to the upper in order that it may turn, as shown in dotted lines, if there is material behind it. The stop &c. mechanism also may be actuated through the lever 19 when the upper part of the hopper recahes its highest position. The air conduit 27 is connected by a branched pipe 31 to opposite sides of the connection 28. The flow of air is regulated by adjusting the valve 32 and register 30. In a further modification, a hopper 33, Fig. 5, contains a vertical shaft 34 provided with vanes 35 and a worm 36. A grooved or ribbed cone 39 is slidably but non- rotatably mounted on the lower end of the shaft, and normally is forced against the lower edge 41 of the hopper by an adjustable spring 40.
Patent GB-1192194-A (GB)
Title: Silencer for Suction or Discharge of Fluids Unders Pressure
IPC: F01N1/24
Filed: 1967-07-26
Abstract: 1,192,194. Gaseous flow silencers. CHIYODA KAKO KENSETSU K.K. July 26, 1967 [Aug. 5, 1966; Jan. 30, 1967], No.34321/67. Heading F1B. A silencer comprises an inlet 1 attached to an outwardly diverging cone 7 covered with sound absorbing material, an intermediate cone 7b, and a central cone 7c filled with sound absorbing material 12a, the outlet end 16 of the silencer being inclined obliquely to the axis. The intermediate cone 7b is covered on both sides with sound absorbing material.
Patent GB-340371-A (GB)
Title: Improvements in electric insulators
IPC: H01B17/20
Filed: 1929-11-11
Abstract: 340,371. Insulators. CORNING GLASS WORKS, Walnut Street, Corning, New York, U.S.A.-(Assignees of Littleton, J. T. ; 31, East 5th Street, Corning, New York, U.S.A.) Nov. 11, 1929, No. 34413. Convention date, Nov. 24, 1928. [Class 36.] In order to avoid the building-up of a breakdown potential between the line connection of an insulator and the pin, the insulator surface is provided, at the head and at the pin recess, with an intimate metallic coating produced by spraying a hot insulator with the solution of a metallic salt such as stannous chloride, the insulator being afterwards baked. In the embodiment, the head 12 of a high tension insulator is formed with a cable groove 13, and an annular groove 14 in the body 11 is adapted to receive the tie wire. The insulator is formed with a shed 15 with petticoats 16, 17, and has a skirt 18. The pin hole comprises a tapered bore 19 ending in a threaded recess 20. The head 12, groove 13, and the walls of the recess 20 are sprayed while hot with a solution of a metallic salt such as stannous chloride, the insulator being then baked.