baber/WOPTO huggingface dataset:
Patent GB-464923-A (GB)
Title: Method and apparatus for tapering a metal tube
IPC: B21C37/18
Filed: 1935-10-30
Abstract: 464,923. Drawing. BARNHART, G. E. Oct. 30, 1935, No. 29933. [Class 83 (iv)] Dies.-A tube is tapered by passing it between rotatable dies, grooves in which form a die opening having relieved areas between the engaging surfaces of the die elements with the tube, whereby beads are allowed to form at the relieved areas and are smoothed out by successive passes of the tube through the dies, the tube being partially rotated after each passage. The drawing aperture is formed between grooved rolls 44 which are slowly rotated as the tube is drawn therethrough to impart the required taper. A solid or collapsable mandrel 25 may be employed. The tongs 201 engaging the tube 24 are actuated by a draw rod 20 supported by a cross-bar 22 having rollers 23 running on cylinders 14. Pistons 15 in the cylinders actuate the rod 20 through rods 16 and a cross-bar 19. The actuating valves 31 for the cylinders 14 are controlled by rods 35, 36 adapted to be engaged by a roller 23 at each end of the travel. A rack 55 secured to the bar 22 rotates the rolls 44, in timed relation to the travel of the tube, through gearing 52, 54, the rolls being intergeared. The rolls are relieved at their points of mutual engagement 60, 60<1>, to form grooves to accommodate the ridges or beads normally formed at these points. The tube is angularly displaced in successive operations, and the final operation has no drawing effect, whereby the beads are smoothed out. It is stated that by increasing the speed of the surface of the rolls relatively to that of the work, as by rotating the rolls in a direction opposite to the movement of the work and drawing the work at a high velocity, the action is such that the wall thickness is decreased. By decreasing the relative velocity, the action becomes one of compression, and the wall thickness is unchanged or increased. A tube 70, Fig. 8, is tapered by successive drawing operations commencing successively in the positions 1P, 2P ... 8P. A tube 64, Fig. 6, may be successively worked to the degrees of taper F, F<1> ... G. A reverse step 65 is formed by employing dies which are cut away from that position onwards and either cease to work the tube, or continue to impart the altered degree of taper. Varying degrees of taper with reverse steps may be produced by a die such as shown in Fig. 14. Alternatively, a reverse step may be formed by momentarily reversing the rolls, teeth on the rack 551, Fig. 7, being, for example, removed at the position 55b, and being replaced by teeth 66 on the reverse side of the rack bar, imparting a momentary reverse rotation to the.rolls through gears 67, 68, 69, 70. The method of Fig. 8 may be followed by that of Fig. 6. Various forms of tapered tubes are illustrated.
Patent GB-1443362-A (GB)
Title: Lsi chip package
IPC: H01L23/367
Filed: 1973-06-25
Abstract: 1443362 Integrated circuit package AMDAHL CORP 25 June 1973 [10 July 1972] 29967/73 Heading H1K In a package for an LSI chip, an insulating base 36 has a plane area to receive the LSI chip 24 and has attached to its opposite surface a cooling stud 66 to which fins (not shown) may be releasably attached. The base 36 is of alumina ceramic and is made by sintering together a lower plane part and two rectangular frameshaped parts. One frame-shaped part carries metal tracks which pass beneath the other frame-shaped part 39 to electrically connect flying leads 82 from the chip 24 with cranked external leads 69. The tracks and other metallization 47/43, 46, 52, 56, 58 are formed using tungsten paint and later plated with nickel and gold. Part of this metallization interconnects an earthing point on the chip 24 to the cooling stud 66. The chip is hermetically enclosed by lid 31. The external leads 69 are originally part of a plane rectangular lead-frame. The corners of the frame are clipped off to allow the leads to be cranked. Every alternate lead is then cut from its respective one of the four remaining spine portions and tested. The spine portions are not separated from the remaining leads until after insertion of the chip in the package. The method of making the package is described and claimed in Specification 1,443,364.
Patent GB-1388905-A (GB)
Title: Die casting
IPC: B22D17/32
Filed: 1972-06-28
Abstract: 1388905 Pressure die casting IDRA-PRESSEN GmbH 28 June 1972 [6 July 1971] 30168/72 Heading B3F In a method of pressure die casting in which pressure is applied to the press piston of a cold chamber die casting machine in a plurality of phases, the time required to build up the pressure applied by a multiplier piston 1 in the final phase is independent of the injection speed in the second phase. During the first phase fluid pressure produced by a pump P is supplied to a bore 3 in the multiplier piston 1 and acts on the press piston 4 to cause a relatively slow movement thereof. After a given time or after the press piston 4 has reached a given position, the valves 6 and 12 are actuated. Actuation of the valve 6 actuates a further valve 5 so that pressure medium from a reservoir 7 arrives via lines 8, 9 and 10 at a space 11 in front of a stop piston 13. The increased pressure now acting on the press piston 4 causes the piston 4 to move more rapidly and this constitutes the second phase of operation during which the mould is filled with metal. A spindle 34 attached to the valve 5 permits adjustment of the piston speed. Although the valve 12 is actuated at the same time as the valve 6, a throttle 14 prevents the pressure in a space 16 from being released and thus the stop piston 13 remains in its closed position. When the mould has been filled, the pressure in the space 11 rises and causes a valve 15 to be changed over. This opens the space 16 to atmospheric pressure thus causing the stop piston 13 to move to the right into its open position. The pressure in the reservoir 7 now acts directly on the multiplier piston 1 which moves to the left as soon as the counter-pressure in a space 20 has been overcome. A valve 36 is actuated in time dependent or path dependent manner from the press piston and when in its changed-over position causes immediate opening of the stop piston 13. The increased pressure may therefore be applied to the press piston at any time prior to the end of the mould filling.
Patent GB-846387-A (GB)
Title: Frequency variation response circuit
IPC: H03D3/22
Filed: 1956-10-03
Abstract: 846,387. Frequency modulation receivers; frequency discriminators; valve oscillator circuits; valve limiter circuits. RADIO CORPORATION OF AMERICA. Oct. 3, 1956 [Oct. 18, 1955], No. 30195/56. Classes 40(5) and 40(6). An oscillator locks in with and follows the frequency deviation of an applied FM wave without response to its amplitude variations, but ceases self-oscillating when the FM wave amplitude is high. At low amplitude level of the FM wave applied to the control grid 28 the oscillatory voltage on the suppressor grid 26 connected to the oscillator tuned circuit 30, 32 is equal in frequency but different in phase from the input to the grid 28 in dependence on the instantaneous frequency and current pulses of correspondingly variable duration pass to an anode integrating circuit 46, 44, giving an output variable with frequency. Oscillations are generated due to voltage excursions of lagging phase being capacitively induced on the suppressor grid by the modulated electron beam, the suppressor grid becoming self-biased by a resistance capacitance circuit 36, 34, and oscillations of leading phase being capacitively fed back to the control grid 28, their amplitude becoming about equal to the bias produced by the cathode circuit 35, 33. Large signal input however produces grid current flow lowering the high impedance of the tuned grid circuit 20 so that self-generated oscillations cease. Further, the FM input wave is limited due to grid current flow, and to negative feedback at the amplitude variation frequency by the cathode circuit 35, 33, and by the valve 24 having a short cut-off suppressor grid characteristic so that when the cathode bias increases relative to the mean voltage on the suppressor grid any increase in cathode current is mainly diverted to the screen grid 38, and the anode current remains constant. In a modification a connection from a capacitive potential divider replacing single capacitor 32 is made through a neutralizing capacitor to the control grid 28 so that the circuit 30, 32 is not self-oscillatory. In a further modification the anode circuit comprises tuned primary and secondary circuits of a transformer, i.e. the FM wave is converted to an AM wave, which may be conventionally demodulated by an amplitude detector. The frequency detector tube 24 may also be employed as an amplifier by injecting an audio voltage, as from a gramophone pick-up, into the suppressor grid circuit through a switch.
Patent GB-302596-A (GB)
Abstract: 302,596. NationaI Cash Register Co., (Assignees of Shipley, R. M.). Dec. 17, 1927, [Convention date]. Item counters.-In a cash register, for example of the Shipley type, wherein groups of counters such as for clerks and transactions respectively are provided for counting the number of operations performed with use of corresponding keys, the means for operating one group is disabled when certain keys in the other group are used. The various counters are arranged in banks and selected and operated in the usual manner, the transaction counters seen in Fig. 5 being selected by the differential arm 118 and operated by the slotted plate 131 reciprocated by cam 153 through link 147, arm 145 of yoke 144, hub 143 engaging this yoke, arm 141 of the hub, and link 133. The clerks counters are similarly selected by arm 155, Fig. 2, but the slotted plate 156 in this case is operated from the arm 141 through a disconnectible device consisting of a pin 162 carried by a plate 163 slidably pivoted on shaft 164. When a " No Sale " key is depressed and the machine operated, the differential arm 118 is moved to such a position that a pin 180 on it rides upon the high part 181 of a curved plate 174 pivoted at 175 to a lever 172 connected at 173 to a lever 171 also supporting the plate at 177. The resulting inward displacement of the plate rocks the lever 172 counterclockwise and the toe 178 of this lever, disposed beneath a pin 179 on the plate 163, thereupon raises the pin 162 from a notch in arm 141 and so breaks the driving connection to the clerks slotted plate 156. The curved plate 174 may be formed with high spots wherever desired so as to prevent operation of the clerks ccunters when transactions corresponding with these spots are being effected.
Patent GB-1532022-A (GB)
Title: Method for tagging explosive material
IPC: F42D5/00
Filed: 1976-07-21
Abstract: 1532022 Explosive material UNITED STATES DEPARTMENT OF ENERGY 21 July 1976 [6 Aug 1975] 30292/76 Heading C1D The origin of explosive material, for example dynamite or detonators, is identified by incorporating into each batch of material a uniquely coded tagging mixture containing at least two rare earth metals in a predetermined weight ratio to one another, collecting post-detonation residue, recovering and concentrating the rare earth metals therefrom, and determining the nature and ratio of the rare earth metals for identification purposes. Concentration of the rare earths may be effected by high pressure liquid chromatography. An yttrium, strontium, or alumina phosphor may be prepared from the recovered rare earths, irradiation of the phosphor, e.g. with X-rays, providing an analysis of the rare earths present.
Patent GB-1313607-A (GB)
Title: Vacuum interrupter contacts
IPC: H01J7/18
Filed: 1970-06-23
Abstract: 1313607 Sintered contacts INTERNATIONAL STANDARD ELECTRIC CORP 23 June 1970 [27 June 1969] 30329/70 Heading C7D [Also in Division H1] Vacuum switch contacts are formed from a compacted powder mixture of a metal, such as copper or silver, and an active getter metal e. g. titanium, which is sintered a few degrees below the eutectic temperature. Alternatively contacts are formed from a stack of alternate copper and titanium sheets, compressed together and heated so as to form a diffusion bond between them. Alternative getter metals are suggested, those which are preferred being beryllium, boron, columbium, hafnium, lanthanum, silicon, thorium and zirconium. Small percentages of lead or bismuth may be added to improve the antiweld properties of the contacts.
Patent GB-272389-A (GB)
Title: Improvements in stands for fountain pens
IPC: B43M99/00
Filed: 1926-12-01
Abstract: 272,389. Waterman Co., L. E., (Assignees of Ferris, W. I.). Oct. 9, 1926, [Convention date]. Pen stands.-A fountain-pen stand 10 is formed with a recess 15, which may contain a sleeve 16, the recess or sleeve being adapted to receive the nib of a fountain pen 19 and to support the pen at a point below that normally held by the fingers during writing so as to obviate the possibility of inking the fingers. The outer end of the recess may be flared so as to engage the lower end of the penbarrel. In modifications, a bracket, is secured to the outer end of the sleeve 16 to support the pen-holder; the aperture may be partly closed by a semicircular flange ; a number of projections may be formed in the recess to prevent contact between the ink and wall of the recess; the recess may be bevelled or otherwise formed to hold the pen by friction, or be screw-threaded, so that the nib does not contact with the wall of the recess; or the recess may be filled with a number of stiff bristles secured to the bottom of the recess, or with a quantity of shot or like material.
Patent GB-925456-A (GB)
Title: Treatment of surface sprouting edibles
IPC: A01N47/20
Filed: 1961-08-24
Abstract: A method of treating surface sprouting edibles, e.g. potato tubers, beets, carrots, turnips, rutabagas and radishes, to inhibit the sprouting thereof comprises contacting said edibles with finely-divided droplets of an organic solvent solution of isopropyl-N-3-chlorophenyl carbamate dispersed in a gas stream. Specified solvents are water soluble organic solvents, preferably boiling above 100 DEG  C., e.g. propylene glycol and glycerin, corn oil, glycerol triacetate, mineral oil, soya bean oil and cotton seed oil.  Desirably, the droplets are introduced into a gas stream which is cool relative to the suspension of droplets.
Patent GB-225385-A (GB)
Title: Improvements relating to clips
IPC: A41F15/02
Filed: 1923-12-04
Abstract: 225,385. Morton, T. Dec. 4, 1923. Clips, pivoted-jaw. - A clip for ties &c. comprises a rigid jaw a curved at one end and provided at that end with a pair of lugs or side pieces between which a relatively flexible jaw b is pivoted, and a closing lever c pivoted on an extension e of the jaw b and bearing against a hard strip j on the jaw a. A spring i tends to force the jaws apart. In a modification, Fig. 13, the jaw b has a pair of lugs k bent up at right angles, and apertures l, m serve for the reception of the pivot pin g and the pivot pieces of the closing lever c.
Patent GB-1110452-A (GB)
Title: Protective device for electric warming cloth
IPC: G05D23/24
Filed: 1965-07-19
Abstract: 1,110,452. Control systems for electricallyheated blankets. MITSUBISHI DENKIKABUSHIKI-KAISHA. 19 July, 1965 [30 July, 1964], No. 30517/65. Heading H2H. [Also in Division G3] An electric warming cloth such as an electric blanket comprises a resistive heating element 2, the energization of which is controlled by the contacts 15b of a relay 15, the operating coil 15a of which is in parallel with the collectoremitter circuit of a transistor 12 controlled by a differential transformer 5, the current in one primary winding 6a is determined by the resistance of the heating element 2, and hence the temperature of the blanket, whilst the current in the opposing secondary winding 6b is determined by the resistor 9. The blanket is energized by operation of a push-button 18 whereupon the relay 15 is energized by way of a rectifier bridge 8. With normal blanket temperature the current in the winding 6a is such that the differential transformer 5 is unbalanced thus the output of the secondary winding 6c is such as to render the transistor 12 non-conductive. Should the blanket temperature rise above a desired value the current in winding 6a will be such as to bring the differential transformer into balance thus nullifying the output from the transformer, whereupon the transistor 12 conducts to shortcircuit the relay operating coil 15a, the relay contacts 15b then opening to remove the supply from the heating element 2. If desired, a thermostat with contacts 3 and heater coil 4 may be provided together with a de-energizing push-button 19.
Patent GB-788358-A (GB)
Title: Improvements in or relating to vacuum insulated assemblies
Inventor: CLARK ARTHUR MAURICE
IPC: F16L59/065
Filed: 1954-10-22
Abstract: 788,358. Storing gases under pressure. BRITISH OXYGEN CO., Ltd. Oct. 6, 1955 [Oct. 22, 1954], No. 30544/54. Classes 8(2) and 99(2). A vacuum-jacketed pipe or storage vessel comprises a rigid inner pipe or vessel, a rigid outer shell surrounding and spaced from the inner pipe or vessel, a connection or connections in the form of a rigid thin-walled frusto-conical shell. or shells connected in gas-tight manner between said inner pipe or vessel and said outer shell to define a closed space therebetween, and connections for evacuating said closed space, said inner pipe or vessel and said shell or shells being made of the same low expansion material, e.g., a nickel-iron alloy containing 36 per cent nickel. As shown, a main inner pipe 1 for conveying liquid oxygen has a branch 2 of the same diameter and a second branch 3 of smaller diameter having a right-angle bend at 4, each of the pipes 1, 2 and 3 being provided with an outer shell 5, 6 and 7 respectively, surrounding and spaced from its respective pipe. At the end of pipe 1 and branch pipe 2, frusto-conical shells 8 are welded to both the inner pipe and outer shell. Smaller frusto-conical shells 9, 91 are welded to both the branch pipe 3 and its shell 7 on either side of bend 4 and a similar shell 9<SP>11</SP> is welded to pipe. 3 and its shell 7 at a point close to junction of pipes 3 and 1. Perforated spacers 10 of insulating material mounted on pipe 1 on either side of junction between this pipe and branch 2, maintain the spacing between pipe 1 and its shell 5. Pipes 1, 2 and 3 and the frusto-cones 8, 9, 91 and 911 are made of a nickel-iron alloy and the outer shells 5, 6 and 7 of mild steel.
Patent GB-727179-A (GB)
Title: Method of stabilising pure phenothiazine
Filed: 1952-12-02
Abstract: Phenothiazine is stabilized by incorporating hexamethylene tetramine, e.g. by mixing the solids or by mixing the phenothiazine with a solution of hexamethylene tetramine and evaporating off the solvent. The amount of hexamethylene tetramine incorporated is about 0.3 to 3.0 per cent.  Examples are given of (1) mixing the phenothiazine and the hexamethylene tetramine in a ball mill; (2) and (3) mixing the phenothiazine with a solution of hexamethylene tetramine in methanol, filtering and drying.
Patent GB-396676-A (GB)
Title: Improvements in or relating to soldering devices
IPC: B23K3/08
Filed: 1931-11-04
Abstract: 396,676. Making electric lamps; soldering irons. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. Nov. 4, 1931, No. 30586. Convention date, Nov. 5, 1930. Void [Published under Sect. 91 of the Acts]. [Classes 83 (ii) and 83 (iv).] The operative end of a soldering-iron consists of a substance which does not alloy with the solder during operation, such as tungsten, the alloy sold under the Registered Trade Mark Stellite, &c. A plate of tungsten &c. 3 is secured to a copper block 2 formed on a copper stem of a soldering iron which may be electrically or gas heated. The iron may be formed with a recessed end, the face 10 being used for soldering the top contact of an electric incandescent lamp and the face 9 the side contact. Oxide, residual solder paste or flux may be removed from iron by a scraper or one or more brushes. A scraper 4 may be arranged so that it can perform a relative movement with respect to the iron so as to clean the iron after every operation.
Patent GB-724071-A (GB)
Title: Improvements in ion beam focusing lens
IPC: B01D59/44
Filed: 1948-11-25
Abstract: 724,071. Heavy-ion-beam tubes. SKINNER, H. W. B. Nov. 25, 1948 [Nov. 25, 1947], No. 30656/48. Class 39 (1). A lens for concentrating and deflecting charged particles consists of a number of sets of electrodes, each set consisting of curved strips which are staggered with respect to one another so that ions of equal charge to mass ratio are directed to a common focus. The lens is mounted on a wall 12c by insulators and rods which connect together respectively the electrodes of each set and is arranged between the ion projector 13 and the target 14. Between two end plates 18, which are arranged in a plane which is normal to the magnetic field, are fitted two sets of curved electrode strips 19. 20, the strips in one set being staggered in the direction of the magnetic field with respect to those in the other set. External auxiliary strips 22, 23 are arranged in the same planes as the inner strips. Specification 723,861 is referred to.
Patent GB-703482-A (GB)
Title: Improvements in or relating to electric batteries
IPC: H01M50/618
Filed: 1950-12-15
Abstract: 703,482. Batteries. OLDHAM & SON, Ltd., and BOOTH, F. Oct. 19, 1951 [Dec. 15, 1950], No. 30698/50. Class 53 The cells of a battery are provided with filling openings 10 which communicate with a common duct 12 having a tube 13 for the introduction of electrolyte. The gas vents 11 of the cells communicate with a common duct 15 having an opening at one end.leading to the atmosphere. The cells are provided with a dry filling F of silica gel above which is a layer of glass wool 9. The ducts 12, 15 may be placed side by side instead of one upon another as shown in Fig. 2 and the openings 10 may be formed as slots extending along the sides of the cells.
Patent GB-1419814-A (GB)
Title: Constant speed driven continuous rolling mill
IPC: B21B37/46
Filed: 1973-06-28
Abstract: 1419814 Automatic control of rolling mills GENERAL ELECTRIC CO 28 June 1973 [28 June 1972] 30775/73 Heading G3R In a multi-stand rolling mill, the roll gap of a stand is adjusted according to the deviation from a desired value of the measured power to a drive motor of the preceding stand. As shown, the power to a drive motor e.g. DM3 for stand R3 is measured as the slab SL passes through stand R3 only, and as it is threaded through stands R3 and R4. Any difference in power controls the screwdowns SD4 of stand R4, after a delay, to reduce the difference, and thus the interstand tension or compression, to an acceptable level. The power to motor drive DM4 of stand 5 is similarly controlled by gap adjustment of stand R5. The roll force in stand R3 is measured by load cell LC3 and compared with a predicted value, any error also being used to control the screwdowns of stand R4, with similar control of the roll-gap of stand R5 by the measured roll force in stand R4. The time of travel of the slab between roughing stand R2 and stand R3 is measured by thermal sensors T1, T2 to vary the pre-set gap of stand R3 and the gain of screwdown control circuits 61, 62 of stands R4, R5, thus compensating for changes in slab temperature due to differing threading times. The stand motors DM3 to DM5 are constant speed motors, and the screwdown drives may be SCRs. In an alternative Fig. 2 (not shown) the control of the stands may be by a digital computer using the above measured parameters and given equations.