baber/WOPTO huggingface dataset:
Patent GB-586925-A (GB)
Title: Improvements in or relating to manufacture of screw threads
IPC: B23G5/10
Filed: 1944-05-09
Abstract: 586,925. Rolling screw - threads. LANDIS MACHINE CO. May 9, 1944, No. 8805. Convention date, June 9, 1943. [Classes 83 (iii) and 83 (iv)] Chasers; taps.-A tool for cutting a screwthread in a work piece by relative rotation of the tool and the work comprises a plurality of teeth, each tooth having on one or both sides a rough cutting edge and a finish cutting edge meeting at an obtuse angle to simultaneously rough-cut axially spaced portions of a side face or faces of the screw-thread and finish cut to final form, other axially spaced portions of said side face or faces adjoining the rough cut portions. The invention is shown applied to the cutting of a screw-thread by a set of four chasers of which two, A and B are shown in Figs. 2 and 4. The first cutting tooth 31a of the chaser A has an edge 32a for rough forming the first portion of the side of a thread groove, this portion being subsequently finished by the part 35 of the edge of the cutter 31b of the chaser B, the part 34 of the same edge at the same time rough forming the side of a deeper portion of the thread. Similarly as regards the second teeth 22a and 22b of chasers A and B, the parts 55 of the latter finish the thread portions rough formed by the cutting edges 53 and 54. The rough and finish cutting portions of each side of a tooth meet at an obtuse angle. Non-cutting guide teeth 18a and 19a are provided beyond the final cutting teeth 21a, 21b. The invention is applicable also to taps. The Specification as open to inspection under Sect. 91 comprises also a thread-rolling device having rotatable thread-rolling dies so shaped as to have the general profile of the chasers shown. This subject-matter does not appear in the Specification as accepted.
Patent GB-398895-A (GB)
Title: Improvements in or relating to electrical signalling systems
IPC: H02J13/00
Filed: 1931-03-24
Abstract: 398,895. Electric signalling systems. AUTOMATIC ELECTRIC CO., Ltd., Strowger Works, Liverpool, and RAYNER, T. R., 2, Stretton Avenue, Wallasey, Cheshire. March 24, 1932, No, 8821. [Class 40 (i).] In a system in which signals are transmitted by damped oscillations, the current for producing the oscillations is supplied from the end of the signalling circuit at which transmission is initiated and variation in the frequency generated is effected by altering the constants of the oscillatory circuit. As shown in Fig. 1, current in a power system is fed from bus bar 12, the trip coil 15 being in circuit with battery 17, relay 18, and contact 16 of the fault relay. Condenser 21 is normally charged from 12. When relay 18 operates, contact 22 closes and 21 discharges through 23, generating a train of damped oscillations which pass to the signalling line 26, 27 via 24. Fig. 2 illustrates an embodiment of the invention in which current is fed from the receiving station. The apparatus to be supervised controls contacts 34, 35. When 36 is closed, 38 pulls up to open 43 and, if either or both contacts 34, 35 are closed, the relative condenser 39 or 40 is charged. When 36 is opened, 43 closes and the charged condenser discharges through 42 to generate a train of damped impulses in the signalling circuit. The impulses are fed by 37 to relays 31, 32, 33 which are selectively energized to light lamps 28, 29. As shown, different frequencies would be generated if 34, 35 or both 34 and 35 are closed. Alternatively each condenser could be included in a separate oscillatory circuit so that the frequency generated is independent of the other condensers, the signals thus comprising either a single frequency or a combination of frequencies. In a further form 38 could be arranged to control a stepping device which connected with each of the switches in turn, one frequency being transmitted if the switch is open and a second if it is closed. Specification 374,432 is referred to.
Patent GB-607021-A (GB)
Title: Electron discharge devices
IPC: H01J21/36
Filed: 1946-03-22
Abstract: 607,021. Thermionic valves. STANDARD TELEPHONES & CABLES, Ltd. March 22, 1946, No. 8934. Convention date, July 4, 1944. [Class 39 (i)] In a vacuum tube, especially one designed for use at high frequencies, the cathode 4 has a hollow metal support 9 which also serves as a low inductance cathode lead. This support has two punched-out ears 10 which carry rods 11 which support the insulating plates 12; these support the grid 3 and give further support to the cathode. The grid is connected to the grid ring 6 which is sealed through the envelope. Conductors 18 connect the cathode to the support 9 whose lower end is flanged; the lead in wires 7 are connected to this flange.
Patent GB-848268-A (GB)
Title: Improvements in or relating to electrical connectors
IPC: H01R33/05
Filed: 1958-03-20
Abstract: 848,268. Lamp-shades. SULLAM, S. D. Dec. 20, 1958 [March 20, 1958], No. 8934/58. Class 75(2). [Also in Group XXXVI] In a holder for a " pea " lamp (see Group XXXVI) a cap 11, which screws over a twopart insulating body to hold the parts thereof together, is formed at its end adjacent the lamp with petal-like formations 12 to simulate a small flower.
Patent GB-512336-A (GB)
Title: Improvements in and relating to glass polishing apparatus
IPC: B24B7/24
Filed: 1938-03-24
Abstract: 512,336. Polishing glass. PILKINGTON BROS., Ltd., WALDRON, F. B., and GRIFFIN, J. H. March 24, 1938, No. 9012. [Class 60] In glass polishing apparatus wherein the tools operate on the underside of the glass, means are provided for supplying rouge, or other polishing- medium and water to the glass whereby the rouge is kept in suspension, and choking of the piping is avoided. The glass strip 1 is polished by felt-covered discs 2 on a frame 3 attached to a disc 4 carried by a hollow rotating shaft 5, and within the shaftare two concentric tubes, an outer tube 7 screwed into the part 9 of a distributing box 10 secured to the shaft at 11, and an inner'non-rotating tube 8 on which turns an inner sleeve 12 of the box 10. The tube 7 is supported at its lower end by a ring 13 and the inner tube 8 carries a spider 14 supported on a ball bearing 15 by a ring 16 in the shaft; the tube 8 is connected to a pipe 17 for the supply of rouge and water. In the box 10 the tube 8 ends in a space 18 having three outlets 19, from each of which a rubber pipe 20 passes to one branch of an inverted V tube 21 supported. by a column 25 on the disc 4, a pipe 22 passing from the other branch of the tube 21 to an inlet 23 in the box 10 leading to the space between the tubes 7, 8. The pressure in the pipes is regulated by adjustment of a washer 26, held by a cap 27 on the lower end of the tube 7, soas to leave an annular outlet round the tube 8 through which the rouge and water pass, via the spider 14 to a sump 28 and a pump 29, and in each pipe 21 is jet hole 30 through which the rouge and water issues on to the under surface of the glass 1. The tube 8 may be rotatable with the tool, a gland then being provided at its lower end. In a modification, the return pipes 22 pass into, or through the shaft 5 and each has at its outlet an adjustable valve; or the pipes may discharge into a trough on the distributing box 10. The jets may be in the form of rubber nozzles flattened by contact with the glass. In a further modification, the supply pipe passes round near the periphery of the disc 4 and has therein, at intervals, inverted V pipes with jet holes therein.
Patent GB-1043873-A (GB)
Title: Improvements in and relating to the manufacture of semiconductor devices
Inventor: BEINKOWSKI BOHDAN MARIAN
IPC: H01L21/00
Filed: 1964-03-04
Abstract: 1,043,873. Semi-conductor devices. ASSOCIATED SEMICONDUCTOR MANUFACTURES Ltd. March 4, 1964, No. 9178/64. Heading H1K. A wire or pellet is alloyed to a semiconductor body by first securing the wire to the body with an adhesive, enclosing the wire with material to form a refractory mould, heating to remove the adhesive and to alloy the wire to the body over the area which had been occupied by the adhesive fillet. In one example a plurality of transistors are produced by attaching three wires 3, 4 and 5 (Fig. 2) of lead with 5% antimony to the surface of a germanium wafer consisting of a P-type body 1 with an antimony diffused N-type layer 2, by means of a polymethacrylic ester adhesive layer 6 which forms a fillet portion 7 at each wire. Selected portions of such wire are then cut away to provide a plurality of groups as shown in Fig. 3, and the whole surface and wires are covered with a paste 8 (Fig. 5) of magnesium oxide in methanol which after drying, acts as a mould. On heating the adhesive lacquer evaporates leaving voids 9 and 10 and the wire material wets the germanium surface in the area originally occupied by the lacquer fillets. The magnesium oxide mould is etched away and a blob of aluminium paint is applied to the centre wire 4 of each group. The whole is recoated with magnesium oxide and heated so that antimony diffusion extends the N-type region under each wire and alloying of the aluminium results in a P-type recrystallized region under each centre wire 4. The body is masked and etched to remove the N-type layer 2 from the edges and underside surface and indium discs are alloyed to the surface opposite each group of wires to provide contacts to the P-region. The body is divided into individual transistor sections, each section comprising 2 base electrodes 3 and 5 to the N-type layer portion, emitter electrode 4 and collector electrode 24 (Fig. 11) which is soldered to a chrome-iron header member 25. The devices are completed by etching and encapsulation treatments. A further example is described in which the prewetting step before the application of the aluminium is omitted and in another example two wires only instead of three are used to provide the electrodes.
Patent GB-1464814-A (GB)
Title: Grain dryer
IPC: F26B21/00
Filed: 1975-03-05
Abstract: 1464814 Drying grain BENDIX CORP 5 March 1975 [29 March 1974] 9188/75 Heading F4G An apparatus for drying grain 48 in a container 42 comprises an air compressor 12, molecular sieves 22, 24 for adsorbing O 2  and H 2 O from the compressed air, a valve 18 for periodically delivering compressed air to one or other of the sieves, and ducts 94, 96, 40 for delivering the N 2 -rich gas mixture leaving the sieves to the container 42. The valve 18 is operated by a solenoid 88 energized by a time control 58, and check valves 98, 102, 108, 110, and restriction 104 direct some of the N 2 -rich mixture to the sieve not in operation to desorb it. The mixture going to the container may be heated at 112. Valves 46, 52 control gas pressure in the container 42.
Patent GB-199507-A (GB)
Title: Improvements relating to packet making machines
IPC: B65B61/00
Filed: 1922-03-30
Abstract: 199,507. Molins, W. E. March 30, 1922. Dropping - roller sheet feeds; sheet separators; pile tables and supports.- A sheet-feeding device of the type described in Specification 24307/14 is provided with means for creasing the blanks as they are fed one at a time to a packet-making machine, thus rendering pressure unnecessary for keeping the gummed parts together. The creasing means are placed between the suction-feed c and feed rollers g and may take the form of circumferential grooves on the feed-roller d and ridges on the dropping roller e, or transverse or diagonal grooves may be employed. One roller may be of hard material with ridges or grooves, and the other of resilient material, such as rubber. A series of parallel circumferential grooves may be cut in one roller to ensure a straight feed and one roller may be slightly barrel-shaped. As shown in Fig. 2, the roller e may be made in two parts e<1>, separated by a collar m and the roller d may be knurled. V-shaped ridges and grooves k, h are shown, but ridges with a rounded crest may be employed.
Patent GB-1129955-A (GB)
Title: Unsaturated nitriles and esters and derivatives thereof
Inventor: CAVALLA JOHN FREDERICK
IPC: C07C233/09
Filed: 1966-03-03
Abstract: 1,129,955. Substituted acetylenic-amines. JOHN WYETH & BROS. Ltd. 28 Feb., 1967 [3 March, 1966], No. 9319/66. Heading C2C. Novel compounds of Formula I and salts thereof wherein m is 0 or 1, Ar and Ar<SP>1</SP> are each phenyl, naphthyl, or a phenyl radical substituted by an alkoxy, aralkoxy, halogen or alkyl radical, X is cyano or a carboxylic radical or a salt, ester or amide thereof, R<SP>1</SP> is H or methyl, R<SP>2</SP> and R<SP>3</SP> are each C 1-4  alkyl or aralkyl or together with the nitrogen atom form a heterocyclic ring which may contain a further hetero atom and which may be substituted by a methyl or phenyl group, are prepared by reacting a nitrile or ester of Formula II with formaldehyde or paraformaldehyde and an amine HN.R<SP>2</SP>.R<SP>3</SP>and if desired hydrolysing the ester or nitrile so formed. Compounds of Formula II are prepared by reaction of a compound of Formula IV wherein M is an alkali metal, with a halide of formula Hal-CHR<SP>1</SP>-C#CH. Compounds of Formula I above wherein X is aminomethyl or hydroxymethyl are prepared by reduction of the corresponding cyano or carboxylic ester compounds. Pharmaceutical compositions having action on the central nervous system and in conventional forms for oral, rectal or parenteral administration comprise a compound of Formula I above and a carrier or diluent.
Patent GB-857346-A (GB)
Title: A process for the production of silicon and the elements of group 4a of the periodic system
IPC: C22B34/10
Filed: 1958-03-24
Abstract: Si and the elements of Group IVa of the periodic system according to Mendeleef, especially Ti, are produced in crystalline form by reduction of their sub-halides by reaction of a melt of an alkali or alkaline earth metal halide not reduced by sodium and containing the sub-halide dissolved therein with a regulated flow of metallic sodium vapour sufficient for complete reduction of the sub-halide.  When the melt contains a sub-chloride, as the preferred sub-halide, the temperature thereof is maintained above the m.pt. of the sodium chloride by-product and preferably at 800-850 DEG C.  Mixtures of the sub-halides, especially those of zirconium and hafnium, may be employed resulting in the product of a metal alloy.  Sodium chloride is the preferred alkali metal halide, and the mole ratio of sub-halide to alkali metal or alkaline earth metal halides is generally less than 1.5 preferably 1:3.  The sodium vapour is prepared by slowly vapourising sodium over a period of 1-100 preferably 3-24 hours and the reaction is carried out either in an inert atmosphere or in vacuo.  In a modification a complex compound of the sub-halide with an alkali metal halide e.g. Na2TiCl4, is used in place of the melt of alkali metal or alkaline earth metal halide not reduced by sodium and the sub-halide.ALSO:Metals of Group 4A of the Periodic System according to Mendeleef especially Ti are produced in crystalline form by reduction of their sub-halides by reaction of a melt of an alkali or alkaline earth metal halide not reduced by sodium and containing the sub-halide dissolved therein with a regulated flow of metallic sodium vapour sufficient for complete reduction of the sub-halide.  When the melt contains a sub-chloride, as the preferred sub-halide, the temperature thereof is maintained above the m.pt. of the sodium chloride by-product and preferably at 800-850 DEG C.  Mixtures of the sub-halides, especially those of zirconium and hafnium may be employed resulting in the production of a metal alloy.  Sodium chloride is the preferred alkali metal halide, and the mole ratio of sub-halide to alkali metal or alkaline earth metal halides is generally less than 1.5 preferably 1 : 3.  The sodium vapour is prepared by slowly vaporizing sodium over a period of 1-100 preferably 3-24 hours and the reaction is carried out either in an inert atmosphere or in vacuo.  In a modification a complex compound of the sub-halide with an alkali metal halide, e.g. Na2 TiCl4, is used in place of the melt of alkali metal or alkaline earth metal halide not reduced by sodium and the sub-halide.
Patent GB-698825-A (GB)
Title: Machine for the collection of litter and leaves
IPC: A01G1/12
Filed: 1952-04-17
Abstract: 698,825. Garden appliances. GLOVER, W. R. April 17, 1952, No. 9451/51. Class 6(ii). Leaves &c. are swept by a pronged spindle b. against a concave shield c and thence into a receptacle e. The spindle is mounted on arms d. projecting from the frame, and frictionally driven by the main wheel through a wheel h on the spindle b. Springs i press the wheels a, h together.
Patent GB-628027-A (GB)
Title: Arrangement for the automatic stabilisation of the mean frequency of a frequency-modulated generator
IPC: H03C3/09
Filed: 1947-04-09
Abstract: 628,027. Automatic frequency-control systems. PATELHOLD PATENTVERWERTUNGS- & ELEKTRO-HOLDING AKT.- GES. April 9, 1947, No. 9464. Convention date, April 12, 1946. [Class 38 (iv)] The mean frequency of a frequency-modulated generator is automatically stabilized at the frequency of a control source, by mixing the two waves in two separate modulators, one of the input circuits being arranged to give 90 degree phase displacement. Of the two phasedisplaced beat outputs, one is differentiated and given a further phase-shift, and is mixed with the other in a third modulator, the D.C. output of which is a measure in sense and magnitude of the frequency error, and is fed to a frequencycorrecting device. One or both of the beatfrequency outputs may be modulated by an auxiliary frequency before they are fed to the third modulator. As shown in Fig. 1, the control source e1 feeds a frequency f1 to two modulators M1, M2, one of which is fed directly at frequency f2 from the FM generator G, the other being fed through a quadrature network P1. Of the two beat-frequency outputs f1-f2, one is fed directly to the third modulator M3 and the other through a differentiating and phase-shifting network P2. The output from M3 is smoothed at B and its D.C. component, which is proportional to the frequency difference f1-f2, is supplied as a frequency control to the FM generator G. The modulators M1, M2 may be valves with two control grids, and the mixer M3 may be a pair of oppositely-poled diodes with one input applied in parallel and the other in push-pull. Limiter valves are interposed between the output of M1, M2 and the input of M3 (Fig. 4, not shown). In a modified circuit, Fig. 3, the two beat frequencies U2, U3 are each modulated by an auxiliary source H in modulators M4, M5 and the outputs therefrom inter-modulated in M3. The resultant is passed through a filter F to a last modulator M6 where it is mixed with the output of the source H. From the output the D.C. component is separated by a smoother B and is used to control the FM source G. In a further modification, the auxiliary source H modulates only one of the beat frequency outputs, (Fig. 2, not shown). If the control source generates a series of harmonics, a band filter is connected after one or both of the two modulators M1 M2 the band width being less than half the fundamental frequency. In this way, the controlled frequency is brought into coincidence with the nearest harmonic. The frequency-control may be effected by a valve reactance, an inductance with a saturable core, or by a variable condenser with electro-mechanical drive. Two controls may be provided, one operating mechanically with a large time constant and steep characteristic, and the other operating electrically with a small time constant and a flatter characteristic.
Patent GB-700280-A (GB)
Title: Improvements relating to heating and ventilating installations for large capacity vehicles
IPC: B60H1/00
Filed: 1952-04-15
Abstract: 700.280. Ventilating vehicles. DAIMLER-BENZ AKT.-GES. April 15, 1952 [April 14, 1951], No. 9469/52. Class 137 Heating and ventilating installations for vehicles, particularly buses, includes a heat exchanger 20, preferably provided with a blower 24 at the front of the vehicle and adapted for heating fresh air entering by an intake 23, and an air duct 31 extending from the heat exchanger beneath a middle gangway flooring 36 for distributing the conditioned air into the vehicle. The heat exchanger 20 is supplied by pipes 16, 17 which are connected through valves 18, 19 to the cooling pipes of an internal combustion engine 12 at the back of the vehicle. Semi-circular shutters 27, 28 mounted on a common axis in a distributer box 25 provide means for regulating and directing the flow of conditioned air into the duct 31, or into a "Y" pipe 33 leading to defrosting nozzles 35, Fig. 2, at the base of a windscreen 34, or through openings 59 in the distributer box 25 directly into the passenger space 60. The air passes from the duct 31 through openings 39 at floor level, into hollow girders 46 which have openings 41 for discharging the air into the gangway 36 and openings 42 which lead into hollow pedestals having outlet apertures beneath seats, not shown. The shutters 27, 28, operated by a lever 29, have arms 50, 51 fixed to their pivots, the arm 50 being connected to the lever 29 by a link 52 and the arm 51 being connected to a lever 54 of triangular shape having a slot for engaging a pin carried by a side arm of the lever 29 to provide a lost motion arrangement. The lever can be placed in any one of three positions so that either both shutters are closed, or the shutter 27 is partly open and the shutter 28 is closed so that all of the treated air passes to the defrosters 35, or so that both shutters are fully open and part of the treated air passes down the duct 31 and.the rest is divided between the duct 32 and the outlet 59 to the passenger space of the vehicle.
Patent GB-314568-A (GB)
Title: Improvement in safety means for use in the transfer of material from one wagon, skipor like carrier to another
IPC: B66B17/26
Filed: 1928-03-29
Abstract: 314,568. Wright, S. D. March 29, 1928. Operating and controlling doors pneumatically, electrically, and by treadles and the like.-In apparatus for transporting material in which the material is transferred from one carrier to another, e.g. from a truck C on rails 15 to a skip B on rails 10, automatic means is provided to prevent normal operation of the discharge door of the carrier C when either of the carriers is away from the transfer station, and handoperated means is provided to permit operation of the discharge door at any time. As shown, the carrier C is an electrically-driven truck with hinged door 16 operated by a compressed-air cylinder 23 through connections 17 - - 20. The admission and exhaust of air to the two ends of the cylinder as required are controlled by a hand-operated valve 24, but the supply of air to this valve from the tank E is normally cut off by a lift valve 34. This valve is opened automatically when both carriers C and B are at the transfer station as shown, and may be opened manually at any time. The valve stem forms the core of a solenoid 37 and the valve 34 is opened when the circuit 38, 37, 40, 41, connecting the mains 39, 42, is closed at the switch F or through an emergency switer 53 on a branch 52. The switch F is closed automatically by a lever G at the transfer station when both carriers B C are in position, and it may be closed manually at any time by the handle 49.