baber/WOPTO huggingface dataset:
Patent GB-796741-A (GB)
Title: Separation and recovery of volatile sulphides from sulphide materials
IPC: C01G30/00
Filed: 1955-10-31
Abstract: <PICT:0796741/III/1> <PICT:0796741/III/2> Volatile sulphides, i.e. sulphides which can be volatilized at a temperature not exceeding 1420 DEG  C. under an absolute pressure not exceeding 10 m.m. of mercury, are separately recovered from material containing both volatile and nonvolatile sulphides by subjecting the material to successive drying, deaerating and heating in a vacuum so as to vaporize the volatile sulphides, and differentially condensing the vaporized sulphides in a condenser having a temperature drop of, e.g., 20-150 DEG  C. per foot of condenser length.  Temperatures of 415-1420 DEG  C. at pressures of 1, 2 and 10 m.m. are specified. Volatile sulphides specified are those of zinc, cadmium, tin, mercury, antimony, arsenic, bismuth, indium and gallium.  Nonvolatile sulphides specified are those of iron, copper, cobalt, nickel, manganese, molybdenum and silver. Iron pyrites decomposes during the heat treatment to produce ferrous sulphide and sulphur, the latter vaporizing with the sulphides.  The sulphide-containing material may be crushed to minus 3 mesh before treatment.  Radiant heating from electrically heated resistance rods, or electrical resistance heating may be employed.  The heating step may have a duration of 5 minutes to 2 hours.  The material may be heated first to 740 DEG  C. so as to remove sulphur, and arsenic, mercury, tin, bismuth and antimony sulphides and then, in the same or a different hearth using the same or a different condenser, to a temperature of 1100-1400 DEG  C. to vaporize the remaining sulphides.  A condensed mixture of zinc, lead, and cadmium sulphide may be recycled.  As shown, the material is heated under vacuum in furnace 4 (Fig. 2) by means of electrically heated rods 6 and the vapours produced pass under baffle 8 and through outlet 9.  The residue forms a slag and is removed via barometric leg 26.  The vapours pass from outlet 9 to a condenser 10 (Fig. 1) which is provided with a removable liner 12 which may be in sections.  A cooling jacket 13 surrounds the condenser 10.  In order to regulate the cooling differential at least part of the cooling medium may be preheated by passage through the cooling jacket of one of the other condensers (Fig. 5, not shown).  At the outlet end of condenser 10 is a vertical condenser 19 for sulphur which extends into a container 22 to form a barometric leg.  A connection 18a leading to a vacuum pump may be provided in condenser 19.  The coated liner is removed in vacuo to a cooling and aerating chamber after removal of closure member 17.  Two condensers 10, 10a may be used in parallel, one condenser being on stream while the liner and deposited sulphide is removed from the other.
Patent GB-209881-A (GB)
Title: Feeding mechanisms for rotary printing presses
IPC: B41F9/00
Filed: 1922-11-14
Abstract: 209,881. Barker, R. W., (American Bank Note Co.). Nov. 14, 1922. Grip,per mechanism.-The impression cylinder b<1>, Fig. 1, of a rotary engraved-plate printing- machine is formed with a gap b<2> in which a set of grippers g are mounted. The grippers g take the sheets from a feed table c and press them against an inclined edge b<3> on the cylinder b, and the grippers are actuated to release their hold of the sheet at about the time that they pass the printing-plate a<1> on the printing-cylinder a, and then move away from the impression cylinder independently under spring action and pass into the aperture b<2>, as shown in Fig. 1, so as to free the sheet entirely from their action. The grippers are opened and closed by a cam j, Fig. 2, which rotates the shaft e intermittently in opposite directions by acting on a sector i geared to the shaft e. The fall j<1> on cam j permits a spring k to move the sector to close the grippers, and the rise j<2> positively moves the sector to open the grippers. The shaft e is fitted with adjustable blocks f fitted with heel portions f<1> which acts on heels g' on the grippers g to close them, and the opening motion of the grippers is obtained from springs g<2> arranged between seats f<2> on the blocks f and seats on the. grippers. The independent spring mounting of the grippers permits the different grippers to conform to varying surface conditions of the plate.
Patent GB-613846-A (GB)
Title: Improvements relating to the tuning arrangements for wireless apparatus
IPC: H03J5/06
Filed: 1945-11-20
Abstract: 613,846. Adjusting radio apparatus. CHESNEY, E. ST. J. Nov. 20, 1945, No. 31233. Drawings to Specification. [Class 40 (v)] The spindle of the tuning condenser of a wireless set carries an arm of spring steel which holds a metal ball pressed against a plate of soft or easily fusible metal fixed to the condenser frame. The ball enters depressions formed in the plate at positions corresponding to preselected stations. The depressions are formed by the application of heat or heat and pressure between the ball and the plate in the case of fusible metal, or by pressure in the case of soft metal. The ball may be heated with a soldering iron, or by passing a current through the arm, ball and plate, which is insulated from the condenser frame and the chassis.
Patent GB-984117-A (GB)
Title: Steam generating boiler including an overheat sensor and control unit
IPC: F22G5/00
Filed: 1963-08-08
Abstract: 984,117. Safety shut down systems. VAPOR CORPORATION. Aug. 8, 1963 [May 6, 1963], No. 31297/63. Heading F4B. [Also in Division G4] In tubulous water boiler, a thermocouple is attached to the outlet pipe and exposed to heat from a burner, and the output from the thermocouple is amplified and fed to an electronic trigger circuit to shut down the burner when the surface temperature of the pipe exceeds a predetermined limit. The thermocouple 18 is mounted on the outlet pipe 16 of coiled tube boiler 10 heated by a burner 15, and is mounted so that it is exposed to the combustion gases and radiation from the burner. The thermocouple comprises a constantan wire 21 surrounded by insulation within an iron sheath 23 which is welded into a dimple in the outlet pipe 16, Fig. 5, so that the sheath 23 is maintained at the temperature of the pipe 16. The junction of the thermocouple is located at a hot-spot within the boiler. In another form of thermocouple, Fig. 7, the pipe 16 forms one element of the thermocouple, and a protective cover 29 is welded over the constantan wire 26 and its insulation in a groove in the pipe 16. The output from the thermocouple, compared with a reference voltage, is fed to a magnetic amplifier, and to a transistor trigger circuit, Fig. 8 [not shown). The arrangement is such that, during normal operation, a relay is energized to close contacts in the burner control circuit and maintain contacts in an alarm circuit open. Overheating indicated by the thermocouple, or failure of any of the components of the control circuit de-energizes the relay to cut the burner off and sound an alarm.
Patent GB-1324679-A (GB)
Title: Radio receivers
IPC: H03G3/20
Filed: 1972-07-05
Abstract: 1324679 Frequency changing circuits; radio signalling SIEMENS AG 5 July 1972 [13 Aug 1971] 31369/72 Headings H3T and H4L In a V.H.F. radio receiving arrangement which includes one or more frequency converters each tuned to the frequency of a radio signal, which frequency converter converts the received signal to an intermediate frequency in a first mixer stage 6 and subsequently converts it from the intermediate frequency, in a second mixer stage 11, to either the original frequency or that of another V.H.F. channel, the local oscillation source 12 for the second mixer stage 11 comprises an amplifier which acts as a buffer stage connected to the oscillator 7 of the first mixer stage 6, when conversion is made to the original frequency, or alternatively as an independent oscillator for conversion to the frequency of a different channel. In the embodiment the signal input, derived either from terminal 2, or via switch 5 from a directional coupler is amplified in an R.F. amplifier 1 comprising a field-effect transistor; the mixer 6 also comprises a fieldeffect transistor. An I.F. amplifier 10 giving symmetrical limiting is employed, preceded and followed by ceramic or crystal filters 8, 9. The second mixer 11 comprises a ring modulator.
Patent GB-313138-A (GB)
Title: Improvements in brakes for bicycles and like vehicles
IPC: B62L5/00
Filed: 1928-10-29
Abstract: 313,138. Detilloux, F. June 9, 1928, [Convention date]. Addition to 294,567. Brake mechanisnm.-In a back - pedalling brake for bicycles &c. as described in the parent Specification, the pawl 31g adapted to engage notches in the crank axle 2 is carried by a ring member formed of one or more parts (as shown, of two parts 31a, 31b) held in position by a surrounding sleeve 31p, the internal diameter of the ring being such that it may be mounted on the crank axle in the required position. The pawl 31g and its spring 31f are mounted in a hole formed by cutting away a part of the ring. The ring and sleeve are held together by a screw 31v and also by the eyed screw 31n which forms the connection to the brake rod. The parts 31a, 31b of the ring are held against relative displacement in the axial direction of the axle 2 by interengaging projections and recesses, and the internal diameter of the sleeve 31p is such that it may be passed over the larger parts of the axle 2. The eyed screw 31n passes through a hole in the crank bracket casing, the hole being closed by a sliding plate which moves with the screw and is pressed against the casing by a spring, felt &c. packing being provided. The retractive movement of the brake is limited by an enlargement on the brake rod adapted to engage a part fixed to the cycle frame.
Patent GB-1107246-A (GB)
Title: Process for the production of o-hemiacetals of formaldehyde
IPC: C07C43/02
Filed: 1965-07-23
Abstract: Formaldehyde hemiacetals are prepared by reacting monomeric formaldehyde with a mono-hydric or polyhydric alcohol or phenol, which may be substituted, in the presence, as a catalyst of an acid, an organic phosphine, an organic arsine, an organic stibine or an organic nitrogen compound, the heat of reaction being extracted. Specified catalysts include sulphuric, perchloric, hydrochloric and p-toluenesulphonic acids, BF3, BF3 etherate, oxonium fluoborates, amines, quaternary ammonium compounds, N-methylol compounds, amidines, imino ethers, hydrazine derivatives and dithiocarbamic acid derivatives. Solvents may be used, or melts.  In examples, hemiformals are prepared from n-propanol, cyclohexanol, lauryl alcohol, sec.-butyl alcohol, 2-ethylhexanediol-1,3, propylene glycol mono-acrylate, butanediol-1,4, glycerol, 1,4-bis(hydroxymethyl)cyclohexane, t.-butanol and resorcinol. Many other hydroxy compounds are specified.
Patent GB-537031-A (GB)
Title: Improvements in fuel feeding devices for internal combustion engines
IPC: F02M59/00
Filed: 1939-12-04
Abstract: 537,031. Variable-speed gear. RICCI. F. Dec. 4, 1939, No. 31436. Convention date, Dec. 5, 1938. [Class 80 (ii)] [Also in Groups XXVIII and XXVI] In a fuel-feeding device for aircraft or other internal combustion engines, the pump 1 is actuated through a planetary speed-changing gear the casing 7 of which carries a crown wheel 8 in engagement with a pinion 9 controlled by an electric, hydraulic, pneumatic, or other brake. In the form shown, the pump 1 is driven by a main or secondary hydraulic or electric motor 6, and the brake is in the form of a gear pump 10, 11 and a reservoir 13 which can be short-circuited by a slide valve 16. The latter is operated against the action of an adjustable spring 19 by the pressure in the delivery pipe 25 acting on a piston or deformable diaphragm 22. Delivery is maintained constant by means of a bellows 27, whilst the pump shaft 2 may drive, through a mechanical or electrical transmission 32, an indicator 33 which may be re-set to zero so as to indicate the rate of delivery and also the total consumption.
Patent GB-189346-A (GB)
Title: Improvements in or relating to life-saving appliances
IPC: F42B12/68
Filed: 1922-08-24
Abstract: 189,346. Blondiaux, D. Aug. 24, 1922. Barrels for linethrowing guns. A line - throwing projectile is formed with a sleeve b, Fig. 1. for temporary attachment to any fire arm, or the projectile may slide. into a separate sleeve b, which is then secured to the barrel by a bayonet or similar fastening. The line is housed in a magazine surrounding the gun barrel to which it may be held so as not to interfere with the sighting arrangements by a clamp on the barrel having forwardly extending springs engaging the interior surface of the magazine.
Patent GB-267241-A (GB)
Title: Improvements in method of and apparatus for treating comminuted carbonaceous material
IPC: C13B20/12
Filed: 1925-12-14
Abstract: 267,241. Naugle, J. J. Dec. 14, 1925. Electrode furnaces. - Comminuted carbonaceous material, the carbonized. ligneous residue obtained in paper pulp manufacture for example is converted into active carbon by subjecting it in stages to successive heat treatments, in the presence of air or steam or both. at different temperatures by passing through it electric currents of varying intensities, while agitating and advancing the material through an electric furnace. Carbonaceous material, to which fluorides may be added in order to remove siliceous impurities by volatilization may be charged into an electric furnace, Fig. 1, comprising cylindrical metal sections 11, 12, 13, which are insulated from one another and serve as external electrodes, the current passing between the latter and an Internal rotary electrode shaft 30 divided into three insulated sections 31, 32, 33, Fig. 4. The shaft is provided with conducting vanes 34 and also with stirring means 50 which facilitate the passage of the material charged in through the hopper 15 to the outlet hopper 18. The sections 31, 32, 33 are insulated from one another by gaskets 44 and to enable current to be supplied to the central section 32, a. conductor 45 is passed from a flange 48 which is insulated from the sections 31, through a central passage in the latter. Air or steam or both these agents are admitted under pressure through a pipe 70 and the gaseous producs are removed through pipe 60 which leads to a condenser and water seal. The various operations, such as the partial combustion effected by the treating gases may be regulater according to the condition of the samples removed through test holes 81, 82, 83. The product may be collected in a water-cooled conveyer and passed to a washing tank. Specification 267,240 is referred to.
Patent GB-815582-A (GB)
Title: Improvements in or relating to tools for crimping electrical connectors to electrical conductors
IPC: F15B7/00
Filed: 1957-03-26
Abstract: 815,582. Ball bearings. AMP Inc. March 26, 1957 [Jan 17, 1957], No. 31650/58. Divided out of 815,581, [Group XXII]. Class 12 (1). [Also in Group XXII] In a tool for crimping electrical connectors (Group XXII), a screw-threaded member 40 rotatable by a handle 43 co-operates with a bearing box 46 containing complementary screw threads 48 which co-operate with the member 40 to form a ball-bearing raceway. When the ball-bearings 50 reach the end of the raceway they are recirculated through a channel 52 so that they travel continuously with the threaded member 40.
Patent GB-192839-A (GB)
Title: Improvements connected with pillion or rear seats for use with motor cycles and the like
IPC: B62J1/14
Filed: 1921-11-26
Abstract: 192,839. Austin, A. T. Nov. 26, 1921. Saddles and seats.-A metal seat 30 for motorcycles, motor vehicles &c., is supported on a frame 27, springs 31 being interposed at one end. A leather or other cover 32 is riveted over at the end 29 and held over the peak by a spring 34.
Patent GB-1315414-A (GB)
Title: Molybdenum purification process
IPC: C22B3/28
Filed: 1970-06-30
Abstract: 1315414 Molybdenum trioxide GTE SYLVANIA Inc 30 June 1970 [30 June 1969] 31714/70 Heading C1A Pure MoO 3  is produced by dissolving an impure Mo source in H 2 SO 4  to form a molybdenyl sulphate solution, adjusting the concentration to 120-180 g./l. calculated as MoO 3 , filtering, and maintaining the temperature of the solution at 70-90 C. to precipitate MoO 3 . The remaining solution may be contacted with an organic extractant to extract further Mo, as described in Specifications 1,315,033 and 1,315,413. The sulphate solution may be obtained by dissolving technical grade MoO 3  (80-85% pure) in H 2 SO 4  at 250-260 C. and may have a pH of 0À4-1À2. The product may be dried at 100 C. and is said to be
Patent GB-412838-A (GB)
Title: Improvements in or relating to hand cultivators
IPC: A01B1/06
Filed: 1933-11-15
Abstract: 412,838. Hand tools for working soil. WOLF EISENWARENFABRIK GES., A., (trading as WOLF - GERATE -FABRIK A. WOLF GES.), Betzdorf-on-Sieg, Germany. Nov. 15, 1933, No. 31908. Convention date, Nov. 30, 1932. [Class 6 (ii).] A hand cultivator comprises one or more shares each having a tapered and pointed front edge, parallel side edges of considerable length, and a substantially V-shaped, deeply cut out, rear edge. The shares may be of sheet steel and bent slightly along their longitudinal middle line. The ratio of their length to their width is approximately 8:3. In a three-share cultivator the shares 1 are arranged as shown and are formed integrally with share carriers 2, or welded to them. The three carriers meet in a point, where they are attached to a handle socket 4. Each carrier is attached to its share near the centre of gravity. It merges smoothly into the lower surface of the share and extends first in line with the central line of the share and is then curved upwardly, a cutting edge being formed on the curved part.
Patent GB-189993-A (GB)
Title: Improvements in mercury, and other vapour, electric lamps
IPC: H01J61/36
Filed: 1921-11-29
Abstract: 189,993. King, F. A., Reynolds, F., and Silica Syndicate, Ltd. Nov. 29, 1921. Low-pressure metallic-vapour apparatus.-A mercury or other metallic-vapour lamp of the atmospheric type has a plug d of glass, such as quartz-glass, fitting with a ground joint into a tubular extension b of the body c of the lamp, so as to facilitate the introduction and withdrawal of mercury or other metal; a number of such plugs may be fitted into extensions. The plug may be perforated to allow the escape of air, and may be combined with a contact. In a modification, a hollow plug is combined with a U-shaped tube to allow the escape of air, as described in Specification 172,666. In another arrangement, the plug is combined with a mercury switch for controlling the circuit of a heater. The joint may be secured with cement. Specifications 5596/08, 21834/08, 14587/11, and 129,022 are referred to.
Patent GB-397454-A (GB)
Title: Process for proofing substances for the manufacture of containes for foodstuffs and similar products, and new articles of manufacture resulting therefrom
IPC: D21J1/08
Filed: 1931-11-18
Abstract: Material such as cardboard, wood-fibre, &c. intended for the manufacture of containers for foodstuffs or for liquid or pasty products, is metallized while in sheet form before the manufacture of the containers.  Metallization may be effected on one or both faces of the cardboard &c., or between two constituent layers of the cardboard.  The metal, e.g. aluminium, silver or tin, may be deposited in the form of a powder, or may be in the form of a thin sheet secured to the cardboard by adhesive.
Patent GB-191247-A (GB)
Title: Improvements in or relating to operating mechanism for change speed gear
IPC: G05G9/08
Filed: 1921-11-30
Abstract: 191,247. Juckes, T. C., (trading as Efficient Motor & Engineering Co.). Nov. 30, 1921. Controlling variablespeed gearing.-Selector bars 1, 2, Figs. 1 and 2, of a changespeed gear are operated by means of studs 3, 4 which project inwards through a drum cam 7 and through guide slots 11 in a fixed sleeve 10 within the. cam. The slots 11 cause the studs to slide as the cam 7 is turned through toothed segments 15, 16, Fig. 3, from a pivoted lever 13. The lever 13 has a spring locking-pin 19. The upper part 23 of the lever 13 is adapted to be adjusted so as to bring the handle within reach of, say, the driver of the vehicle. There is a pivot joint 24 and holes 25 for effecting the adjustment. In a modification, the operating-lever has a lateral movement for unlocking against the action of a spring bolt at the pivot centre of the lever.
Patent GB-606447-A (GB)
Title: Improvements in and relating to sustaining propellers for aircraft and parachutes
IPC: B64C27/46
Filed: 1945-11-27
Abstract: 606,447. Rotary wing aircraft. ISACCO, V. Nov. 27, 1945, No. 32038. [Class 4] The sustaining rotor of a helicopter or rotary parachute comprises telescopic blades, each section 2 being provided internally of its trailing edge with a bearer 8 engaging the trailing edge of the section located within it. Outward movement of the blade sections is limited by shoulders 5, 6 at their ends. In the form shown in Fig. 6, longitudinal ribs 14 are provided on the inner surface of each section, engaging complementary grooves on the outer surface of the inner section. Fig. 7 shows a rotor hub construction, the rotor being tiltable about a ball joint 51, collective pitch control of the blades being effected by a member 28. Brake elements 54, 55 are engaged when the pitch setting is sufficiently great to overcome the force exerted by a spring 30. The blades may be driven by jet units or by an elastic motor as described in Specifications 590,612 and 601,912 respectively, or by the fall of the aircraft as described in Specification 583,767. Specification 592,896 also is referred to.
Patent GB-1122260-A (GB)
Title: Improvements in or relating to electric heating elements
Inventor: MESSUM HAROLD FRANK
IPC: H05B3/48
Filed: 1966-07-16
Abstract: 1,122,260. Sheathed resistance heaters. MOORWOOD-VULCAN Ltd. 16 July, 1966, No. 32080/66. Heading H5H. Each end of a metal sheathed heating element is sealed by a ceramic plug 14 with metal ferrules 13, 15, secured thereto, one ferrule 13 being secured to the metal tube 10 and the other ferrule 15 being secured to the terminal conductor 12 at part 18, and the ceramic element 14 has a circumferential flange 19 against which the ferrules 13, 15 butt. Flange 19 increases the electrical leakage path and helps to prevent leakage or tracking of current along the surface of element 14. Apart from flange 19, the heating element is constructed as in Specification 726,504. Reference has been directed by the Comptroller to Specification 726,504.
Patent GB-299894-A (GB)
Title: Improvements in and relating to belt or strip driving mechanism
IPC: G03B27/46
Filed: 1928-11-03
Abstract: 299,894. British Thomson-Houston Co., Ltd., (Assignees of Bedford, A. V.). Nov. 3, 1927, [Convention date]. Feeding webs.-Relates to mechanism for driving a belt or strip, such as a motion picture film having a sound-record thereon. The object of the invention is to compensate for inequalities in the feeding action of two driving members engaging the strip at different points in its length, one of these members being a roller. In the apparatus shown, a combined sound-record and picture film is fed past a light aperture by means of a sprocket 2 and a driving-roller 4, against which roller the film is pressed by an idler 5. The members 2, 4 are connected together by gearing (not shown), and are driven at a substantially constant speed. Between the sprocket 2 and roller 4, the film forms a loop 3, and on account of irregularities in the feed by the sprocket 2 the loop tends to assume from time to time the positions shown at 18, 19 in dotted lines. A curved guide 15 may be provided to assist in causing the loop to bend over the roller 4 when it becomes sufficiently large. A guide 16 may also be arranged as shown. With the arrangement shown, the speed at which the film is moved by the roller 4 varies automatically in accordance with the speed at which it is moved by the sprocket, the rate of feed due to the roller increasing when the film bends over the roller as shown at 18, and diminishing when the film bends away from the roller, as at 19.