baber/WOPTO huggingface dataset:
Patent GB-221767-A (GB)
Title: Improvements in lift latches
IPC: E05B15/12
Filed: 1924-05-30
Abstract: 221,767. Orton, F. J. May 30, 1924. No Patent granted (Sealing fee not paid). Latches, lift and thumb.-The locking pin 16 for the lift latch 1 is provided with one or a pair of projections 18 or is made otherwise of a non- circular section at its inner end which is adapted to be passed through a similarly shaped hole in the latch 1 and then turned into the position shown in Fig. 4 to prevent accidental withdrawal of the pin. The keep comprises an attachment plate 8 and a bridge-member 9, riveted together, the member 9 having cheeks 10 between which is a slot 11 leading to a hole 12 having side grooves 13 to accommodate the projections 18 whilst the plate 8 has a central hole 15 of larger diameter. The projections 18, which may either be formed integrally with the locking pin or by driving a pin diametrically through the shank 16, also serve as trunnions to allow the pin 16 to hang vertically from the keep when withdrawn, Fig. 3.
Patent GB-1427590-A (GB)
Title: Gallium phosphide semiconductor devices
IPC: C30B19/06
Filed: 1973-03-20
Abstract: 1427590 Epitaxial growth SONY CORP 20 March 1973 [21 March 1972] 13294/73 Heading BIS [Also in Division H1] A p type GaP epitaxial layer is deposited on an n type GaP substrate from a Ga-GaP solution containing zinc and oxygen, the zinc being present in a concentration which is in approximate equilibrium with the partial vapour pressure of the zinc in the surrounding atmosphere and which is less than the donar concentration (e.g. of Te) in the substrate. The p n junction thus formed is very close to the substrateepitaxial layer interface. For electroluminescent diode manufacture the oxygen is supplied by Ga 2 O 3  in the solution or by Ga 2 O in the atmosphere and provides recombination centres with the zinc in the vicinity of the junction. The method may be carried out in a closedtube furnace but is preferably performed in an open tube using argon, hydrogen or nitrogen as a carrier gas. The completed diode may be moulded in transparent resin.
Patent GB-1134340-A (GB)
Title: Improvements in "photosensitive thermoplastic or thermosetting copolymers"
IPC: C08G14/04
Filed: 1966-03-25
Abstract: 1,134,340. Modified p-phenylazophenol-aldehyde polymers. GENERAL ELECTRIC CO. 25 March, 1966 [26 March, 1965]. No. 13296/66. Heading C3R. [Also in Division H1] Copolymers are prepared by reacting (1) a compound having the formula R-Y, where R is phenyl or a radical derived from an aromatic multicyclic hydrocarbon and Y is hydrogen, hydroxy, alkyloxy, phenoxy, acetamido, alkylamino or dialkylamino, (2) p-phenylazophenol and (3) an aldehyde in the presence of a catalyst. Suitable compounds (1) are naphthalene, benzene, anthracene, phenol or naphthol and the aldehyde is preferably formaldehyde in the form of paraformaldehyde. The catalyst may be sulphuric acid, zinc chloride, aluminium chloride or sodium hydroxide and the reaction preferably takes place in the presence of an inert solvent, e.g. water, acetic acid or nitrobenzene. A preferred product is that prepared by reacting naphthalene, p-phenylazophenol and paraformaldehyde in an acetic acid solution and in the presence of zinc chloride. The copolymers are useful photoconductive materials.
Patent GB-475048-A (GB)
Title: Improvements in or relating to thermionic valve oscillation generators
IPC: H03C5/04
Filed: 1936-05-11
Abstract: 475,048. Generating circuits using vacuum apparatus. BAIRD TELEVISION, Ltd., and FORMAN, R. J. H. May 11, 1936, Nos. 13303 and 13304. [Class 40 (v)] A split-anode magnetron oscillation-generator, in which variation of frequency due to variation in magnetic field and anode voltage is prevented by operating the magnetron in the dynatron condition and supplying the field current and anode voltage from the same source, is used to control a magnetron modulator. Small changes in field current and anode voltage, due to changes in the supply voltage, have, under suitable conditions, opposite effects on the frequency. The split-anode magnetron 1 oscillates in the dynatron condition and has its field coil 4 and anode voltage supplied from the same source S, S. The supply may be roughly stabilized by means of a barretter. The magnetron 1 is interconnected with a modulating magnetron 2 which feeds Lecher wires 3 and receives modulation current through terminals M, M. The frequency-stabilized magnetron 1 may be of relatively low power. Its output may be applied to the cathode circuit of the modulating magnetron 2, in which case grid modulation is adopted; or to the grid, in which case either grid or series modulation is adopted.
Patent GB-1337692-A (GB)
Title: Lead frame
IPC: H01L23/495
Filed: 1972-03-22
Abstract: 1337692 Semi-conductor devices AMP Inc 22 March 1972 [12 April 1971] 13312/72 Heading H1K In a transistor lead frame having a thick heat sink and a thinner lead assembly, the lead assembly comprises three leads joined by an integral tie bar and connected to the heat sink by a strap bent so that the leads and the heat sink lie in parallel spaced planes, the outer leads being provided with contact arms each of which comprises a first finger joined to a second finger by a flange, there being bends between the fingers and the flange so that the fingers lie parallel to the plane of the heat sink, the flange lies in a perpendicular plane and the free ends of the second fingers overlie the heat sink. As shown, Fig. 1, the lead frame is produced from metal stock 31, of Cu alloy plated with Ni, which has a thick portion 32 and a thin portion 32 formed by rolling or milling. The stock is stamped to produce heat sink portions 4 integral with a support strip 34 having pilot holes 36 and joined by slugs 35 in the thick portion and a lead portion comprising three leads, 6, 8, 10 joined to the heat sink by a strap 12 and the outer leads having contact arms 19 in the thin portion. The free ends 28 of the contact arms 19 are bent slightly out of the plane of the leads to produce contact tips 29 and the arms are then bent at right angles at points 23. The connecting strap 12 is given a double bend to bring the leads 6, 8, 10 into a plane parallel to, but spaced from, the plane of the heat sink and the free end fingers (5) of the contact arms are bent at points 26 to bring the contact tips 29 close together above the top surface of the heat sink. A transistor chip is inserted between the heat sink and the tips 29 of the contact arms which bear resiliently against it and the chip is secured by reflowing solder previously applied to the heat sink. The chip is them encapsulated, the tie bar 17 forming a mould closure and the portions of bar 17 between the leads are then removed by stamping.
Patent GB-142517-A (GB)
Title: Improvements in projection apparatus for optical form, outline, and dimension gauging appliances
IPC: G03B21/10
Filed: 1917-09-17
Abstract: 142,517. Wilson, R. P. Sept. 17, 1917. Optical systems; optical-projection apparatus- -In optical-projection apparatus comprising two lenses or lens parts for simultaneously projecting two images upon a screen, and constituting a gauge in which comparison is made between the images of the edges of the object to be gauged and a test object, means are provided for positioning the lenses or lens parts laterally so that their optical centres can be adjusted to a separation equal to the distance between the object to be gauged and the test object, and the images are approximated by means independent of the lenses. As shown in Fig. 1, the apparatus comprises a lamp a and condenser b for producing a parallel beam, lenses or lens parts g, and a screen o. Prisms c, rotatable by worm and sector gear d or other means, are provided for deflecting the beam upwards or downwards, and prisms h, rotatable about vertical axes by screw gear k<1> or worm and sector gear k<2>, and also rotatable, if desired, about horizontal axes, are provided for bring- ing the images into proximity. When using the apparatus the test object, and object to be gauged, or a single object c of which opposite sides are to be compared, is placed in position, and the lens parts g are separated by micrometer screws f or the like until the readings of the micrometers &c. show that the distance between the lens centres s equal to the distance between the edges to be compared. The prisms h may be replaced by mirrors, and the lens parts g<1>, g<2> may be arranged to overlap as shown in Fig. 5.
Patent GB-512000-A (GB)
Title: Improvements in or relating to switching arrangements for electric conductors
IPC: H01H9/04
Filed: 1938-05-04
Abstract: 512,000. Electromagnetic and magnetic switches. NAAMLOOZE VENNOOTSCHAP RADIBUS MAATSCHAPPIJ TOT EXPLOITATIE VAN RADIO-DISTRIBUTIE-ONDERNEMINGEN. May 4, 1948, No. 13327. Convention date, May 4, 1937. [Class 38 (v)] In a switching arrangement for electric lines, contacts 17, 18 are situated within an envelope 2 having the form of a cable sleeve or covering and are operated by movement of an armature 8 also situated within the envelope and actuated by the movement of a magnet 21; 22 outside the envelope. The armature 8 is fixed to a sleeve 7 adapted to slide on a central spindle 4 and carries a disc 9 which when the magnet 21, 22 is moved into the position shown engages a bend in the contact spring 18 and forces this into engagement with the spring 17. The bend in the spring 18 holds the armature in the upper position till the magnet 21, 22 is moved down to bring the parts into their original position and break the circuit. A series of contacts 17, 18 with their terminals 19, 20 may be arranged concentrically round the spindle 4.
Patent GB-541394-A (GB)
Title: Improvements in metal treads for stairways, floors or the like
IPC: E04C2/42
Filed: 1940-08-24
Abstract: 541,394. Treads and wearing surfaces. BETTLES, J. W. E. Aug. 24, 1940, No. 13423. [Classes 20 (iv) and 107] Each tread unit comprises frame members 1 having inwardly directed flanges 2, 3 forming channels 4 which receive the ends of cross-strips 7, 8 which are riveted together at their points of contact to 'form a unitary structure. A wall 5 closes each end of the channel 4, and the rear strip 7a has inturned ends 7b riveted at 9 to each side member. At the front of the tread a rod 10 is riveted at each end to the side members and the front tread strip 11 is also secured to the side members for example by electric welding, the front edge of the tread being given a distinctive appearance.
Patent GB-1500423-A (GB)
Title: Protective clothing
IPC: A41D13/012
Filed: 1975-04-02
Abstract: 1500423 Protective suits COSALT Ltd 29 March 1976 [2 April 1975] 13457/75 Heading A3V [Also in Division B7] A one - piece suit for protecting the wearer against the effects of immersion in cold water comprises a trunk portion 1 having an access opening 9 closable by a watertight fastener 17, a hood 2, legs 3 and arms 4 and is formed of two layers of textile material the outer of which 7 is waterproof and the inner 6 heat - insulating, the two layers being joined only by seams 8 at the wrists, ankles, neck and opening 9 and being elsewhere separable to form an airspace, each ankle, wrist and the neck of the suit having on its inside a sealing band 12 with means such as a strap 13 for holding the band comfortarbly tight on the wearer and each wrist and ankle having small vents 18 which allow water to seep in to the airspace between the layers to trap air therein for insulation, both layers are woven, layer 7 being of siliconised nylon proofed with polyurethane and preferably being fluorescent orange in colour with a radar - reflective patch on the upper portion of the suit, while layer 6 is also substantially waterproof but breathable and may be metallized e.g. with aluminium on its inner surface to reflect back body heat. Bands 12 are of synthetic rubber or other resilient foam material. Mitts 5 may be attached to the wrists of the suit, these having closable openings 19 and means 21 for holding the mitts turned back onto the sleeves. The trapped air in the space 10 provides some buoyancy but this may be enhanced by wearing a separate life-jacket or by providing buoyant and non - absorbent sheet material within space 10 over the chest, shoulders and back of the neck of the wearer.
Patent GB-785381-A (GB)
Title: Improvements in trailers
IPC: B60G11/14
Filed: 1955-05-10
Abstract: 785,381. Road-vehicle undercarriages. GLOVER, WEBB & LIVERSIDGE, Ltd., and EVANS, L. W. May 10, 1956 [May 10, 1955], No. 13564/55. Class 108(2) A trailer comprises one or more steerable wheels 9 mounted as castors on an undercarriage frame 4 pivoted to the main frame 1, means for locking each castor against pivotal movement about its vertical axis relative to the frame 4, and means for locking the frame 4 against pivotal movement relative to the frame 1. As shown, the trailer has two front wheels 9, castor mounted on the frame 4, and two rear wheels 2 which are non-steerable. An A-shaped towing frame 7 is pivoted at 7<SP>1</SP> to the frame 4 and can be raised from a horizontal position (full lines in Fig. 1) in which it is adapted to be connected to a tractor vehicle, to a vertical underframelocking position (dot-dash lines in Fig. 1) in which it may be secured by a pin 23a to lugs 23 projecting from the main frame 1. Each wheel 9 is mounted by an axle 11 between arms 12, the ends of which are carried by respective tubes 13 slidable against the pressure of a coil spring 19 relative to tubular members 14 rigid with a common plate 15. The latter is pivotally mounted relative to the frame 4 for movement about a vertical axis 16. This movement may be locked by the action of a pin 22. The pin 22 and the pin 23a may be operated manually or by a cable linkage operated from the tractor vehicle by the driver. They may be operated by means of a device similar to the overrun brake normally carried between tractor and trailer vehicles. They may also be operated by hydraulic, pneumatic, electromagnetic servo action, or by hand lever and linkage on the trailer. These pins may be spring-loaded so that they drop into position when the wheels or undercarriage turn to the correct position. The rear wheels 2 may also be mounted on castors, either directly to the frame 1, or to an associated pivoted frame 4. Each castor mounting may comprise a pair of wheels. In an alternative construction for locking the frame 4 to the frame 1 (not shown), in which it is not necessary to move the towing arm 7 from a horizontal to a vertical position, inter-engaging lugs are provided on both the arms 7 and the frame 1.
Patent GB-228417-A (GB)
Title: Improvements relating to spindles for spinning, doubling and like machines
IPC: D01H7/04
Filed: 1924-06-04
Abstract: 228,417. Smith, W. Prince-, and Waterhouse, D. June 4, 1924. Ball bearings; dust, excluding. - Relates to spindles for spinning. doubling and like machines of the kind which revolve in ball bearings disposed within tubular housings secured in apertures in the spindle rail and are driven by wharls secured thereon. The inner races of the ball bearings D, D<1> are fast on the spindle and are spaced apart by a sleeve on a shoulder g of the the upper bearing rests E; and the outer race of housing G and the outer race d<3> of the lower bearing fits within a machined surface at the lower end of the housing and is permitted to find its own position to ensure alignment. Lubricant is supplied through a passage B<2> and is retained in the housing by means of a cap J. The wharl is recessed to form a skirt B<1> which surrounds the neck of the housing and prevents entry of dirt to the bearings.
Patent GB-257325-A (GB)
Title: Improvements in or relating to the liquefaction and separation of gaseous mixtures
IPC: F25J3/04
Filed: 1925-05-25
Abstract: 257,325. Mewes, R. C. E. May 25, 1925. Separating gases by liquefaction. - Air &c. to be rectified is introduced simultaneously into each of two separating columns working at different pressures. Fig. 1 shows an apparatus with two side-by-side columns 1, 2 into which air is introduced at the points 3, 4. The evaporator 5 at the base of the higher pressure column 1 is heated by nitrogen under pressure in a coil 8, the nitrogen being thus liquefied and after expansion through a valve 10 led into a condenser 6. Air may in some cases replace the nitrogen. Liquid oxygen formed in the base of the column is discharged through a valve into a second con. denser 13 beside the condenser 6. Nitrogen is withdrawn from the column through a pipe 15, and heats the evaporator in the " atmospheric " or low-pressure column 2, the gas being thus liquefied and after expansion delivered to the top of the column 2. A valved pipe 23 leads cold make-up liquid from the condenser 6 to the column 2. Nitrogen is withdrawn at the points 20, 21, oxygen at the points 22, 36. Fig. 4 shows the atmospheric column 2 disposed above the pressure column 1 and receiving from it liquid oxygen through a pipe 37 and liquid nitrogen through a pipe 34. Additional liquid nitrogen is derived from a circuit comprising a compressor 32, a cooler, and expansion valves 27, 30. In a modification, this circuit is omitted and the heating coil of the high-pressure evaporator is fed by a compressor drawing gas from the pressure column, and delivers into the same column through an expansion valve.
Patent GB-836916-A (GB)
Title: Decontamination of plutonium-aluminum alloy material
IPC: G21C19/48
Filed: 1957-04-30
Abstract: 836,916. Purifying nuclear fuels. ATOMIC ENERGY OF CANADA Ltd. April 30, 1957 [May 2, 1956], No. 13748/57. Class 39(4). Fission products are removed from neutron irradiated plutonium-aluminium alloy by dissolving the alloy in a molten bath of a fluoride of an alkali metal or an alkline earth metal and a fluoride of lead, cadmium, or zinc, separating the salt phase and treating it with aluminium at a temperature above the melting point of the salt phase. In examples the alloy is dissolved at 900‹C. in a mixture of sodium fluoride and lead fluoride in an atmosphere of argon, the salt phase is treated with aluminium at 1050‹C.
Patent GB-588924-A (GB)
Title: Improvement in treatment of metal surfaces, and agents employed therefor
IPC: C23C22/33
Filed: 1944-07-18
Abstract: A dilute aqueous solution for treating metal surfaces primarily of iron or aluminium or their alloys, comprises an acid of phosphorus, or/and chromic acid in minute quantities to give a pH value between 3 and 5 and sufficient of a nonionic surface-active wetting agent to reduce the surface tension to a value of 50 dynes/cm. Orthophosphoric acid is preferred.  The wetting agent may be natural, e.g., the saponius, casein, glue, starch, agar-agar, or synthetic, and may comprise between .001 and 2.0 per cent. of the solution. Substituted polyethylene glycols are preferred, such as represented by the formula RO(C2H4O)nR1 wherein "R" stands for an alkyl, aryl or aralkyl, alkyl-aryl or acyl radical containing at least 10 carbon atoms, "n" is an integer greater than 2, and "R1" stands for the said radicals or a hydrogen atom.  Metal surfaces are rinsed with the said solution desirably heated to near the boiling point, before applying a protective coating. Specification 284,778, [Class 82 (ii)], is referred to.
Patent GB-166151-A (GB)
Title: Improvements in connection with player pianos and player actions
IPC: G10F5/06
Filed: 1916-09-28
Abstract: 166,151. Whitfields, Ltd., and Chillingsworth, L. Sept. 28, 1916. Actions, cleaning. A suction mouthpiece 37 Fig. 7, which may be attached to an orifice on the spool-box 2 usually closed by a screw-cap 35 and which is applied to the tracker-bar by hand, is put into communication with the main exhaust bellows by means of valve mechanism which simultaneously cuts off the motor, the apparatus being in the re-roll position. The dust-pipe 36 may contain a collecting-chamber 38 and screen 39. The valve mechanism may be as shown in Fig. 3, being placed between the main exhaust 7 and the tube 7<a> which connects to the tempo-box and hence to the motor. The dust-pipe is connected at 11. The orifices 12, 13 are connected by tubes to a device on the spool-box by which they may be opened to atmosphere, the exhaust then raising diaphragms 20, 23 carrying doubleacting valves 22, 24. The valve 22 in rising opens an orifice 28 to atmosphere which is connected by a tube to an orifice 29 so that the diaphragm 16 rises and the valve 14 cuts off the motor from the exhaust. The valve 24 in rising opens an orifice 32 to the exhaust in the box 10, this orifice being connected by a tube to orifice 33 so that diaphragm 18 falls and the valve 17 opens the dust-pipe to exhaust. In the alternative valve-mechanism shown in Fig. 4, a pair of connected slides 41, 42 in one position cut off the connection to the motor, which is in line with the exhaust tube 7, and in the other cut off the dust-tube 11 previously connected through an oblique passage 45 to the exhaust. Or a rotary three-way cock may be used.
Patent GB-589347-A (GB)
Title: Improvements in or relating to spring hinges particularly applicable to paper clips and door closing devices
IPC: E05F1/06
Filed: 1944-07-19
Abstract: 589,347. Clips; door-closing devices ; spring hinges. FRANCIS & BARNETT, Ltd., and FRANCIS, G. I. July 19, 1944, No. 13778. [Classes 44, 65 (i) and 65 (ii)] A spring-hinge device particularly applicable as a paper clip or door-closing device, comprises a wire yoke a the ends of which extend through cam slots b<1> in a fixed housing b and are inwardly bent as at a<2> for pivotal mounting in apertured caps e mounted on the ends of a coiled compression spring d, the spring and parts a<2> being coaxial. When the yoke is swung away from its normal position in contact with a back-plate c on which the housing b is mounted, the cam slots move the limbs of the yoke inwards to stress the spring which, when the yoke is released, co-operate with the cam slots to swing the yoke back to normal position. Papers, not shown, may be clipped between the yoke and support, Fig. 2, showing the normal or gripping position of the yoke, and its open position, in dotted and full lines respectively. The lower ends of the limbs may be cranked as at a<1>, and the upper ends bent away from the support, as shown, to facilitate hand manipulation. As a door-closing device, the housing is mounted on the jamb and the yoke bears against a plate in the door. By suitably forming the cam slots the compression spring may be replaced by a tension spring.
Patent GB-138101-A (GB)
Abstract: 138,101. Bosch Akt.-Ges., R. Nov. 25, 1918, [Convention date]. Transformers.-To facilitate the distribution of the high tension current, an induction coil is formed with a rotary secondary winding f which surrounds an extension e of the hollow shaft d. The winding f is provided with a terminal m from which the sparks jump to the segments n connected to the sparking plugs. The interrupter i of the primary circuit is actuated by a cam h on the extension g of the shaft d. An earthed spring contact s bearing on the end of the shaft g ensures the continuity of the secondary circuit.