baber/WOPTO huggingface dataset:
Patent GB-519748-A (GB)
Title: Improvements in or relating to radio-telephone circuit arrangements
IPC: H04B17/00
Filed: 1938-09-30
Abstract: 519,748. Two-way transmissions. STANDARD TELEPHONES & CABLES, Ltd., and MEERS, R. A. Sept. 30, 1938, No. 28485. [Class 40 (iv)] [Also in Group XL] In a system in which a radio-telephone terminal station has four-wire line connections to extension stations, a feed-back path from the transmitting circuit to the receiving circuit is provided in the terminal station to supply an artificial side-tone to the extension subscribers and to permit the terminal operator to monitor on both circuits by means of a permanent connection to the receiving circuit. In the system shown, an extension subscriber, Fig. 1, has a local side-tone circuit-over condensers C1, C2. On lifting the handset to make a call, hook-switch contacts g operate and relay A energizes to light calling lamp LS1 and to sound a gong G through relay B. When the terminal operator, Fig. 2, inserts the double plug PI, the local side-tone circuit is replaced by one through condensers C3, C4. The operator communicates with the subscriber by throwing key K2 upwards energizing relay C which transfers one of the operator's receivers OR1 from the receiving circuit RL to plug PJ1, the other receiver OR2 being permanently connected to the receiving circuit. At the same time, the operator's microphone is fed over retard L1 and connected over terminals 3 and 7 of transformer T1 to plug PJ2. Movement of key K2 downwards connects the subscriber's transmitter over amplifier AMP1 to the radio transmitter, and part of the speech acts through a control circuit SC to render a feed-back circuit over a "silent-coil" set T3, T4 operative and to render the receiving circuit inoperative by means of a further "silent-coil" set T5, T6. Each of these coil sets presents high impedance with the cross-connections as shown at T5, T6 but has low impedance when terminals 3 are connected together (or both' to ground as .shown). The relay in the control circuit operating contacts sc may also control the connections between the transmitter or receiver and the aerial. When the subscriber, Fig. 1, hangs, up, lamp LS1 is lit over contacts 13, a 1, j 23, but the gong is not sounded. To call the subscriber, key K1 is operated, connecting battery over the tip and sleeve of plug PJ2 to a direct-current bell D. The operator may talk to the radio-transmitter by operating key K3, coil 4, 5 only of transformer T1 being employed in order to give the same speech level as for a subscriber.
Patent GB-742182-A (GB)
Title: Improvements in or relating to turbine blades and materials therefor
IPC: C22C32/00
Filed: 1952-11-12
Abstract: A turbine blade is made of a titanium carbide sintered skeleton which is impregnated and covered with a corrosion resistant alloy. The skeleton contains Ti 75,2 per cent, C 21 per cent, N 0,70 per cent and traces of the following, Si, Fe, V, Kr, Cb, Cr, Mn, Cu, Al, Mg, Ca, Sn.  The protective alloys may be of the types Vitallium, Nimonic-80, Inconel, Nichrome, Hastelloy Alloy C, Multanet.
Patent GB-383020-A (GB)
Title: Improvements in and relating to the headlights of motor and other vehicles
IPC: B60Q1/124
Filed: 1931-10-14
Abstract: 383,020. Directing vehicle lamps. SCHULMAYER, J. C., 17, Parkweg, Bloemendaal, Holland. Oct. 14, 1931, No. 28599. Convention date, April 23. [Class 75 (iii).] Means for swivelling vehicle head-lamps somewhat in advance of the steering comprises a member 10 connected to the steering wheel and capable of partial rotation or of linear reciprocation, and having a cam groove or slot 11 which is engaged by a body, such as a pin 12, eccentrically mounted on a second member 9 which is connected to the lamp or lamps, the groove or slot being provided in opposite walls with a recess 16 and a projection 17 which co-operate to rotate the second member during part of the movement of the first. The groove or slot is shaped either so that further motion of the lamp, or so that no further motion is produced after the body 12 leaves the recess. In the form shown, the slot 11 is formed in a quadrant arm 10 formed integral with the sleeve 34 rotating in the bearing 32. The arm 4, which is connected with the steering gear, has an integral sleeve also rotating in the bearing and engaging a recess in the sleeve 34 by means of a tooth 5. The two sleeves are held together by a nut 6 and bolt 3, and spring 7. The two parts may be released from engagement by a Bowden wire attached to a pin passing through an axial boring in the bolt 3 and having a slot engaging with a pin passing through the bolt. In the event of the lamps becoming locked, the sleeve of the arm 4 rides up and is disengaged, so that steering is not interfered with. The pin which engages in the slot 11 is elliptical in cross section, with a width equal to that of the slot 11, and is carried by a disc 9 mounted on a shaft 13, which carries the lamp. When the lamps are in the normal position, the shaft 13 is held in position by a spring-pressed pin 25 engaging in a recess 24 in the top of the disc 9. When the lamps are being moved, braking is provided by the engagement of the same pin in an arc-shaped groove passing through the recess. In another form, the cam groove or slot is formed on the curved surface of a semi-cylindrical member which is rotated about its axis. Alternatively, an approximately straight groove or slot is formed in a slide, and has a recess and projection which together form a V-shaped path for the pin. The left part of the slot may have a different shape from that of the right.
Patent GB-307693-A (GB)
Title: Improvements in and connected with portable chemical fire extinguishers
IPC: A62C13/00
Filed: 1928-10-05
Abstract: 307,693. Mitchell, J. Oct. 5, 1928. Portable pressure reservoirs.- In a fire-extinguisher of the kind ploying a liquid under pressure and provided with a hand-operated release valve and an automatic fusible valve, the hand and automatic discharge nozzles f, j are arranged at opposite sides of a rotatable valve a, and the entire valve mechanism together with the dip tube e can be removed as a unit by unscrewing the sleeve, b from the boss d. The fusible valve i is fitted with a perforated guard cap k serving as a spraying nozzle. The valve a is normally in the position shown, for automatic operation, and for hand operation is merely turned so that its discharge passage a<1> is in alignment with the hand nozzle f.
Patent GB-1237167-A (GB)
Title: Regenerative hydroclone
IPC: B04C5/081
Filed: 1969-06-06
Abstract: 1,237,167. Hydrocyclones. OKLAHOMA STATE UNIVERSITY OF AGRICULTURE & APPLIED SCIENCE. 6 June, 1969 [13 June, 1968], No. 28686/69. Heading B2P. A hydrocyclone comprising a cylindrical portion 12, a frusto-conical portion 14, a tangential inlet 22 and a vortex finder 28 of cylindrical-frusto conical internal configuration has a frusto-conical discharge portion 34 communicating at its wider end with a cylindrical contaminant collection chamber 38. A grid 42 in the chamber 38 assists in the breaking up of the downward vortical fluid flow thereby enhancing the contaminants to settle out. The contaminants may be discharged intermittently or continuously through a valved conduit 44. Alternatively, the chamber 38 may be closed and may be periodically removed for disposal of the contaminants. The invention is concerned with the design of the hydrocyclone in accordance with a number of specified relationships between the dimensions of various parts of the hydrocyclone, the density and dimension of the particles being separated and the density, viscosity and rate of flow of the liquid being treated.
Patent GB-1179959-A (GB)
Title: Improved Process for Manufacture of Aminonitriles.
IPC: C07C255/24
Filed: 1967-06-22
Abstract: 1,179,959. Production of aminonitriles. STANDARD OIL CO. 22 June, 1967 [29 June, 1966], No. 28881/67. Heading C2C. Aminonitriles are obtained by a process which comprises (I) reacting a mixture of reactants comprising (a) a basic nitrogen-containing material consisting of ammonia, a primary, secondary or polyamine having from 1 to 20 carbon atoms, in the form of a salt with a strong acid; (b) formaldehyde; and (c) hydrogen cyanide in an acidic environment under autogenous pressure at a temperature of 40- 120‹ C.; (II) cooling at least a part of the reaction mixture from step (I) to a temperature below 40‹ C. and separating the aminonitrile from the mother liquor; (III) treating at least a portion of the mother liquor from step (II) with additional basic nitrogen-containing material to achieve a pH greater than 7 at a temperature below 30‹ C., and recombining the thus treated portion with the remainder of the mother liquor; (IV) replenishing the mixture from step (III) with reactants substantially in the same molar proportions as they were consumed in forming the aminonitrile; and (V) recycling the mixture from step IV back to step (I). After step II and stripping of hydrogen cyanide from the remaining liquid phase, the entire liquid phase or a fraction thereof may be fed to a water stripper to remove excess water and the stripped phase may then be treated as in step III, the remainder of the unstripped phase being recycled to the main reactor stream. Nitrilotriacetonitrile is a preferred product of the process; other compounds which may be prepared include ethylenediamine tetra-acetonitrile, diethylene triamine penta-acetonitrile and methylamine diacetonitrile.
Patent GB-227093-A (GB)
Title: Improved means for maintaining a constant level in carburettors for internal combustion engines
IPC: F02M1/00
Filed: 1924-12-03
Abstract: 227,093. Ducamp, A. J. Jan. 3, 1924, [Convention date]. Void [Published under Sect. 91 of the Act]. Spray carburettors.-To prevent changes of level in the float chamber a due to the jolting of the vehicle from being transmitted to the nozzle or nozzles i, h, a capillary space l is provided between the outlets d from the float chamber and the nozzles. The space l may be formed between a tube c and a spindle e, or may be situated out side the float chamber. The upper part of the space l may be closed to the atmosphere, or may communicate therewith through a passage m of small bore. To facilitate assembling, the fuel passage g is fitted over a projection j on the float chamber, and is secured by the spindle e. A removable cover o encloses the float needle n, which may be replaced by a ball or other valve.
Patent GB-1164955-A (GB)
Title: Improvements in Conveyors.
Inventor: CLEMMESEN SVEN OLAR
IPC: B65G43/00
Filed: 1968-06-18
Abstract: 1,164,955. Braking endless conveyers. F. L. SMIDTH & CO. A/S. 18 June, 1968, No. 29054/68. Heading B8A. An inclined endless conveyer 1 has a centrifugal fan 6 coupled to the shaft of its driving motor 5 so as to provide a braking resistance which increases with the speed of the conveyer. The fan has a greater resistance to rotation in one direction than in the other, and is so coupled to the conveyer that the former direction corresponds to downward conveyer rnovement. The vanes of the fan 6 are S-shaped. The fan 6 is used to extract dust from an inlet load-feed hopper 11. A mechanical holder brake 8, activated by current failure, is also provided
Patent GB-1516503-A (GB)
Title: Arrangement for indicating speed of rotation of a body
IPC: G01P3/489
Filed: 1974-07-01
Abstract: 1516503 Indicating rotational speed STRATHEARN AUDIO Ltd 27 June 1975 [1 July 1974] 29122/74 Headings G1A and G1N(A) An arrangement for checking the rotational speed of a gramophone turn-table 1, comprises a switch 3 operated by devices 2 e.g. magnets, a generator 8 providing a signal at a reference frequency determined by the desired speed and the number of operating devices and at least three lamps 13, 14, 15 arranged to light in sequence at a rate determined by the difference between the reference frequency and that of the switch operation and in an order determined by which frequency is highest. In the embodiment of Fig. 2 a comparator 6 has an output 9 at the beat frequency of the inputs 5 and 7 which is coupled to a reversible ring counter 10. Stages 16, 17, 18 of the counter connect each of the lamps 13, 14, 15 successively to a voltage source 20 at the beat frequency rate. An output 11 from a frequency discnminator in the comparator 6 determines the counting direction of the counter 10, and hence the lamp lighting sequence, according to whether the reference frequency is higher or lower than that of the switch operation. In a second embodiment, Figs. 3 and 4 (not shown), an emitter coupled multi-vibrator (28) supplies a reference frequency to a counter (27) comprising a pair of flip-flops the outputs of which are connected to gates (31, 32, 33) of a de-coder (25). The outputs of the gates are connected to respective light emitting diodes (21, 22, 23) the other side of which are connected to a voltage source via a solid state switch 24. The switch 24 is controlled by pulses from the turn-table switch. The switch 3 may comprise a reed switch, a Hall effect device, or an inductive loop coupled to a solid state switch, or a light-sensitive solid state switch may be operated by a series of light reflecting surfaces on the turn-table.
Patent GB-722527-A (GB)
Title: Improvements in or relating to atomisers
IPC: B05B3/10
Filed: 1951-12-12
Abstract: 722,527. Crop sprayers; spray-producers. BALS, E. J. March 11, 1953 [Dec. 12, 1951], No.29128/51. Class 69 (3). A rotary atomiser for mounting in an air duct consists of a perforated casing 12, Fig. 1, the inner surface of which is supplied with liquid from a passage 19, and the liquid flows as a thin film over the inner surface and passes into the air stream from the perforations 13. The atomiser is mounted in an air duct 10 and rotated by fan blades 17, and the spray is carried to the crops by the air blast from the duct. In Fig. 3, liquid is fed to the annular space between members 25 and 12 and issues from circumferentially spaced slits 27. The outer surface of the casing 12 on the ring of slits is ridged as at 23. In Fig. 4, the casing comprises a frusto-conical ring 12 with slits 31 secured by blades 17 to a bearing device 30 on a stationary shaft 29. In a modification of the atomiser of Fig. 4 a tubular member is interposed between the casing and the outer ends of the blades thereby providing a narrow annular space for the flow of liquid to the slits. Specification 679,295 is referred to.
Patent GB-712262-A (GB)
Title: Dry-plate rectifiers
Inventor: HESSE HEINRICH
IPC: H01L29/00
Filed: 1951-12-13
Abstract: 712,262. Dry plate rectifiers. LICENTIA PATENT-VERWALTUNGS-GES. Dec. 13, 1951. No. 29180/51. Class 37. In a rectifier stack each rectifier disc has a current collecting electrode stuck on the semiconducting layer or on the counter electrode. As shown Figs. i and 2 an annular collecting electrode 3 e.g. of iron is stuck on a selenium layer formed on base electrode 1 utilizing as at 2 aluminium bronze as the adhesive. The counter electrode 4 covers the selenium layer and the current collecting electrode 3. In a stack of such rectifiers pressure is exerted on distance piece 5 and this pressure may be chosen so high that the metal of the counter electrode begins to flow thus securing a very close contact between the distance piece  5  and the counter electrode  4 . Both outside and inside edges of the stuck-on electrode  3  are bevelled as shown. If the current collecting electrode is stuck on the counter electrode connection between the two may be established or strengthened by a ring or collar of soldered metal.
Patent GB-990157-A (GB)
Title: Preparation of hexafluorobenzene
Inventor: COTTRELL DAVID WALTER
IPC: C07C17/26
Filed: 1962-07-30
Abstract: Hexafluorobenzene is produced by pyrolysing CHFBr2 at 500-750 DEG C., then cooling and deacidifying the liquid product and finally separating the hexafluorobenzene.  Other notable reaction products are bromopentafluorobenzene and pentafluorobenzene.
Patent GB-357378-A (GB)
Title: Improvements in or relating to telegraphones
IPC: G11B5/127
Filed: 1930-09-30
Abstract: 357,378. Sound recording and reproducing. POULSEN, V., 6, Maltegaardsvej, Gentofte, near Copenhagen. Sept. 30, 1930, No. 29330. Convention date, Oct. 1, 1929. [Class 40 (ii).] :...- Magnetic apparatus. -In magnetic recording and reproducing apparatus the magnetic wire is helically wound on a spool to which the wire ends are attached by spring coils formed thereon or attached thereto, and that portion of the wire which at any particular moment is being influenced by or is influencing, the electromagnets is spread apart from the adjacent turns of the coil. In Fig. 1 the spool 1 is wound so as to leave a gap 6 bridged by the wire coil 7 passing the electromagnets 13 which are carried by an arm 11 which may carry a guide slot engaging the coil 7 and is traversed by a screw 8 geared with the spool. In a modification the coil may be wound loosely enough to permit the bridging coil 7, Fig. 3, to engage a slot 18 in a block 17 which is formed on the traversing arm 11 and slides on the spool, the block providing a support for the poles 14 of the electromagnets. In another modification, Fig. 4, the coil 1 fills the spool but is sufficiently loose to permit the coil which is being recorded to pass round a pulley 19. This pulley may be fixed to a nut 20 engaging a fixed screw 21 or may be loosely mounted on a nut engaging a screw 21 geared with the drum. The coil passing to the pulley moves past electromagnets 13 supported on an arm 11 mounted on the nut 20 and carrying guides for the wire leaving and returning to the spool. The coil may lie in a helical groove formed in the drum and the supporting head for the electromagnets may be pressed against the coils to effect the relative traverse and thus dispense with the traverse screws 8 or 21. If desired the spool may be moved longitudinally instead of the electromagnets, or the latter may be revolved round the spool whilst traversed relatively thereto. For reproducing, a coil in an output circuit encircles the acting portion of the telegraphone wire. Specification 8961/99, [Class 40, Electric telegraphs &c.], is referred to.
Patent GB-1477178-A (GB)
Title: Digital indicating lens meters
IPC: G01M11/02
Filed: 1974-07-02
Abstract: 1477178 Measuring focal length HOYA LENS KK and SOKKISHA KK 2 July 1974 29362/74 Heading G1A In an apparatus for testing the focal length or lengths of a lens, the lens L, Fig. 2, is placed a fixed distance from a photo-detector 20 while an illuminated object 14 is reciprocated to and fro along the axis of the apparatus; the position of the object 14 when its image on the detector 20 reaches a minimum size is a function of the lens focal length. In the case of a bifocal lens, one focus is detected as the object 14 is moved towards the lens and the other as the object returns. Fig. 2 also shows lamp 10, prism 11, lenses 12A and 12B, and diffuser 13 used to illuminate the object 14. Collimating lens 7, 8 direct light to prism 22 where some light is split to eye-piece 5 and the rest passes via filter 21 to the detector 20, a camera tube. In Fig. 5 the movement of the target object 14 is controlled by a pulse motor 30 which steps the object carrier 15 in response to signal generator 31. This generator also controls the image, or corona pattern, size measurement by the vidicon camera 20. By counting clockpulses at 34 during the time that each vidicon scan crosses the image, the image size is found; the size is stored at 35 and then the object 14 is moved and the new image size is compared with the stored one at 36 to find the object position corresponding to the minimum size. Until the minimum size is reached, gate 37 is kept open and signals from generator 31 are counted at 38 and represent the object position. When the minimum size of image occurs the comparison circuit 36 closes the gate, and the display 40 then shows the focal length in diopters.
Patent GB-1111704-A (GB)
Title: Process for preparing phenol novolac resins
IPC: C08L7/00
Filed: 1966-04-27
Abstract: Novolaks are prepared by condensing biphenol-A with formaldehyde or a chemical equivalent thereof in the presence of an inert organic solvent, a minor amount of water and 0.1-0.6% of a weak acid.  The formaldehyde may be a mixture of paraformaldehyde and formalin.  Less than 1 mol. may be used per mol. of phenol.  The solvent may be an aromatic hydrocarbon, e.g. toluene, xylene, or another solvent boiling between 100 DEG  and 160 DEG  C. 33-300% may be used.  The weak acid may be oxalic acid and the reaction may take place under pressure.  In a particular embodiment about half of the phenol, some of the HCHO, all the solvent and all the water may be heated to 80-90 DEG  C.  The remaining reactants may then be added whilst heating is continued, the resultant mixture being refluxed until no more than 1% of free HCHO is present, stripped of water and solvent and heated to 140 DEG  C. under vacuum.  1-150% of the product may be added to an elastomer as a reinforcing agent.  It may be ground up, mixed with 5-10% hexamethylene tetramine and added to an elastomeric composition which may contain a natural or synthetic rubber, e.g. a butadiene/acrylonitrile copolymer, other fillers and reinforcing agents, e.g. ZnO, vulcanizing agents, e.g. sulphur and 2-mercaptobenzthiazole and stearic acid.
Patent GB-1119445-A (GB)
Title: Hearing aid
IPC: H04R25/00
Filed: 1965-07-14
Abstract: 1,119,445. Hearing aids. DANAVOX INTERNATIONAL A/S. 14 July, 1965 [26 March, 1965], No. 29782/65. Heading H4J. A hearing aid comprises a housing 1, 2 of non-circular section to be received in the outer ear, and an elongate container 10 also of non- circular section in which is located a receiver 8, the container 10 extending from the housing 1, 2 for insertion in the auditory canal and being mounted on the housing 1, 2 so as to be rotatable about the longitudinal axis of the container 10. A microphone 3 is resiliently held in the housing 1, 2 by foam rubber pieces 19 and has an opening 20 which communicates with a recess 22 in a wall of the base 1. A battery 4 is carried by a pivotal chamber 23. Plates 15<SP>1</SP>, 16 located in grooves in the base 1 each have a protrusion 17 or 18 which serve as contacts for the battery 4. The top 2 presses the microphone 3 into position and holds the plates 15<SP>1</SP>, 16 by means of a further plate 32. A volume control 6, 7 is cemented to the plate 32. The top 2 has a projection 33 which presses on an amplifier 5 to hold it in position. The lower part of the amplifier 5 has projecting edges which engage in grooves in the base 1 and bear on a locking button 25. The receiver 8 has a diaphragm and sound emanates from an opening 9 into an opening 11 of the container 10. The container 10 is flexible and is covered with a membrane 14 formed with a tightening ring 15. The lower part of the membrane 14 prevents foreign matter penetrating the receiver 8 and acts as a further diaphragm. The container 10 has a flange 13 and can be turned in relation to the housing 1, 2. Helical wire connects the amplifier 5 and the receiver 8. The neck of the container 10 is flexible, whereby its longitudinal axis may take up different angular positions with regard to the housing 1, 2.