baber/WOPTO huggingface dataset:
Patent GB-512526-A (GB)
Title: A new strophanthus glucoside and process for its manufacture
IPC: C07G3/00
Filed: 1938-03-10
Abstract: 512,526. Glucosides. CHEMICAL WORKS, FORMERLY SANDOZ. March 10, 1938, No. 7500. Convention date, Oct. 20, 1937. [Class 2 (iii)] A new,glucoside called k-strophanthoside is obtained by repeatedly dissolving glucoside-rich extracts of the seeds of strophanthus kombe in a solvent miscible with water, such as methyl, ethyl or propyl alcohol, and precipitating with an organic solvent not miscible with water but miscible with the first solvent, such as ether, chloroform or petroleum ether. The glucoside may be purified by recrystallization, e.g. from alcohol-chloroform: It has the properties described in Specification 511,459. An example is given.
Patent GB-413068-A (GB)
Title: A movable platform particularly for transporting cars to parking places in garages
IPC: E04H6/30
Filed: 1933-03-13
Abstract: 413,068. Garages. GALKIN, S., 14, Tottenham Street, Tottenham Court Road, London. March 13, 1933, No. 7524. [Class 104 (ii).] Cars entering a garage at D run on to a platform A mounted on rails B arranged transversely to the entrance, and are carried thereby to any one of the garage cells E, F arranged on each side of the rails.
Patent GB-986609-A (GB)
Title: Improvements relating to floor treating machines
IPC: A47L5/34
Filed: 1964-02-24
Abstract: 986,609. Floor cleaning machines. G. T. FILLERY. Feb. 24, 1964, No. 7556/64. Heading A4F. In a floor treating machine a treatment head such as a suction squeegee 19, a suction brush or a suction polisher is carried by a frame 15 detachably clipped to the machine, e.g. to the wheel axles 4 for rocking movement so that the head 19 is movable between an operative position in contact with the floor and a raised inoperative position. Each longitiudinal frame member 16 has a concave bearing recess 20 resting on a wheel axle 4 to be held therein by a clip comprising a lever 21 having a curved bearing portion 25 for engagement with the underside of the axle 4 in the clipped position. The frame 16 is tilted to raise the head 19 by depressing the rear cross-bar 18, and the head 19 is held in the raised position by the engagement with a stop pin 31 of a cut away portion 30 in an arm 29 of a catch lever 26 pivoted to the frame 16. Specifications 894,035 and 894,036 are referred to.
Patent GB-1467041-A (GB)
Title: Control system for induction motor
IPC: H02P27/06
Filed: 1974-02-19
Abstract: 1467041 Control of A.C. motors GENERAL ELECTRIC CO 19 Feb 1974 [20 Feb 1973 9 May 1973] 7576/74 Heading H2J A three-phase reversible squirrel-cage induction motor 10 is operated as a motor or generator in conditions of non-saturation of the magnetic circuit of its core, with acceleration or deceleration at maximum torque, by a control circuit comprising a drive unit (or frequency changer) 40 supplying the motor with a sinusoidal alternating voltage of frequency and amplitude determined by signals # s , E which, during motor operation in a normal range, are the same as signals # SC , E C  supplied from a control signal generator (50), Fig. 6 (not shown), and signal limiters 150, 80, which define the normal range between limits # SA , # SD  for the signal w SC  and between an upper limit E L  (determined by a voltage limiter 70) and a lower limit O (dependent on # SD ) for the signal E c , all these limits being dependent on the actual speed # r  of the motor sensed by a tachometer 20 and on signals #p and (-)#p, respectively, corresponding to the slip frequency during acceleration and deceleration providing the maximum torque without core saturation. Signals #p, # r  and (-)#p, # r  are summed at junctions 301, 311 to provide the limits # SA , # SD  for limiter 150, whose output signal # s  is applied to unit 40, limiter 70 and a subtraction junction 60, which also receives the signal # r  to produce a signal # of actual slip frequency applied to limiter 70. The output E L  of limiter 70 controls limiter 80 and is a function of the synchronous frequency signal # s  and the actual slip frequency signal #, equations for E L  and the magnetizing current I M  being derived from the design parameters of the motor to relate the slip frequency #p for maximum torque T M  with the current I M . Thus a family of torque/slip frequency characteristics may be obtained for various values of I M  up to that corresponding to the onset of saturation, Fig. 2 (not shown), the value of E L  also depending on the selected value of I M . The torque/slip frequency characteristic for motor or generator operation with maximum magnetizing current I M  is discussed, Fig. 3 (not shown). Also described are the circuit details of limiter 70, Figs. 4 and 5 (not shown), and limiters 80, 150, Figs. 7 and 8 (not shown).
Patent GB-471598-A (GB)
Title: Improvements in or relating to the manufacture of vitreous envelopes
IPC: C03B23/207
Filed: 1936-03-13
Abstract: 471,598. Glass manufacture; fusing and making silica. GENERAL ELECTRIC CO., Ltd., and BREADNER, R. L. March 13, 1936, No. 7626. [Class 56] Relates to the manufacture of a tubular vitreous envelope in which the interior space is divided into two parts by a longitudinal partition, such as the quartz envelope of an electric discharge lamp of the kind described in Specification 470,770. In making the envelope, a quartz tube 2, Fig. 1, with constricted ends 3 is introduced into a wider tube 1, the tubes being kept horizontal. Next, the tubes are heated where they touch, so that they are joined together along the line of contact 4, Fig. 2. The ends 5 of the outer tube are then constricted and united to the ends of the tube 2, so as to form tubes 10, Fig. 4, which may be used for the insertion of electrodes. Side tubes 6, sealed to the tube 1, may be used for circulating cooling-fluid through the space 9 which is left between the outer tube 1 and a partition 7 formed by the wall of the tube 2.
Patent GB-1210606-A (GB)
Title: Circuit interrupter
IPC: H01H77/10
Filed: 1968-02-16
Abstract: 1,210,606. Automatic circuit breakers. TERASAKI DENKI SANGYO K.K. 16 Feb., 1968 [16 Feb., 1967 (2)], No. 7649/68. Addition to 1,095,192. Heading H1N. The circuit breaker described in Specification 1,095,192, is modified so that when the contact 4 moves under electrodynamic repulsion the spring 9 passes overcentre to retain the contact in the open position and slotted plate 50 is provided to reset the contact arm 4 when the arm 3 is subsequently moved to the open position by the tripping mechanism. The contact arms 3, 4 move within the slot 52 in plate 50. The plate, of insulating material, slides in grooves in the partition walls of the breaker housing and serves additionally as an arc barrier preventing the arc gasses, &c. moving back into the mechanism from an arc chute (47), (Fig. 1, not shown). The plate also serves to absorb the kinetic energy of arm 3 as it opens and thus prevents the contact arm bouncing back.
Patent GB-861529-A (GB)
Title: An improved machine for spreading granular or chip material on road and other surfaces
IPC: E01C19/48
Filed: 1958-03-10
Abstract: 861,529. Distributing granular or chip materials; road rollers. SPARKES, R. G. May 7, 1959 [March 10, 1958], No. 7652/58. Class 6(1). A machine for spreading granular or chip material over roads comprises a rotor formed with peripheral pockets mounted below a hopper formed with a transverse opening 40, the hopper being mounted on a chassis 1 carrying front and rear rollers 4, 5. The rotor comprises bars 35a mounted on a drum 35 and is driven by a motor propelling the front roll 4, the rear roll 5 being steerable. Flexible sealing strips 42, 43 are provided at the opening of the hopper and a downwardly inclined deflector plate 38 is mounted on front of the rotor. A pressure plate 41 is mounted within the hopper to limit the feed rate through the hopper opening and a cut-off plate 44 is insertible transversely of the hopper to close off or partially close off the container outlet. Rotary cutting means 58 can be lowered to trim off the side edge of a laid area of material. The hopper 39 may be heated and a water container 45 is provided to spray water at a location between the hopper and front roller.
Patent GB-589480-A (GB)
Title: Improvements in and relating to the nitration of hydrocarbons
Filed: 1945-03-28
Abstract: In the continuous production of nitroparaffins from paraffins and nitrogen tetroxide or nitric acid in the vapour phase, a process comprises subjecting the reaction products to at least one sequence of the following operations: removing the nitroparaffins and water by condensation, oxidizing the nitric oxide in at least a portion of the remaining gaseous products to nitrogen tetroxide by means of an oxygen-containing gas and further reacting the so treated gaseous mixture under nitrating conditions.  Preferably, and especially where a single nitrating zone is used, a portion of the gaseous products remaining after removal of nitroparaffins and water is purged from the system and the remainder after the oxidation step is recycled to the nitrating zone, generally together with fresh nitrating agent and paraffins.  If desired, several reaction zones may be used in series with means situate between each pair of zones for removal of nitroparaffins and water, for oxidizing the nitric oxide and for preheating; fresh nitrating agent and paraffins may be introduced before any of the zones.  The oxidation may be effected at temperatures up to 200 DEG  C., but preferably not above 150 DEG  C.; the oxidizing gas may be air, but is preferably oxygen which, if desired, may contain nitric acid to serve as the nitrating agent.  To avoid explosion risks, make-up paraffin should be added to the gaseous mixture prior to the oxidation treatment and desirably the gas in the oxidation space should not contain less hydrocarbon than that in the nitration zone; the amount of gas recycled to the latter zone should preferably be such that the reaction mixture contains about 50 per cent diluents.  When using paraffins containing up to 5 carbon atoms it is preferred to operate under super-atmospheric pressure.  According to the Provisional Specification, a higher temperature is used when nitrating with nitric acid than with nitrogen tetroxide.  The final purged gas may be treated for recovery of paraffins and oxides of nitrogen.  An example illustrates the continuous nitration of propane by nitrogen tetroxide at 370 DEG  C. and 75 lbs. pressure using a single converter in the manner described above, part of the nitroparaffin-free exit gases being purged and the remainder passed to an oxidation space maintained at 100 DEG  C. and then recycled to the converter; the results are compared with those obtained when no recycle gas is used.
Patent GB-542291-A (GB)
Title: Improvements in or relating to the manufacture of luminescent materials
IPC: C09K11/58
Filed: 1940-05-01
Abstract: 542,291. Zinc sulphide. DU PONT DE NEMOURS & CO., E. I. May 1, 1940, No. 7831. Convention date, May 13, 1939. [Class 1 (iii)] [Also in Group XL] Zinc sulphide is precipitated from an acid solution and calcined with a small amount of a copper compound to form a luminescent paint. The copper is between one part in 5,000 and one in 50,000 of the zinc, preferably between one in 10,000 and one in 20,000. Examples are given in which the sulphide is precipitated with hydrogen sulphide from solutions containing from 0.1 to 1 gramme-molecule per litre of zinc. A small quantity of ammonium chloride or zinc chloride may be added to the precipitate, which is calcined at from 800 to 1,200‹C. The zinc sulphide may be mixed with titanium oxide, barium or calcium sulphate, asbestos or silica in the making of paints. Specification 473,715 is referred to.
Patent GB-121566-A (GB)
Title: Improvements in or relating to Pressure Regulators.
Inventor: MELCHER GEORGE SAMPSON
IPC: G05D16/10
Filed: 1918-05-10
Abstract: 121,566. Melcher, G. S. May 10, 1918. Valves actuated by fluid under control of auxiliary valve ; strainers, applications of. - A pressure-regulating valve of the kind provided with an auxiliary control valve has the inlet to the auxiliary valve fitted with a removable strainer. The main valve 17 is actuated by a piston 18 under the control of an auxiliary valve 20 actuated by outlet pressure admitted through a duct 28 acting on a spring- loaded diaphragm 27. The head of the auxiliary valve is housed in a recess 40 formed in a plug 21 screwed into the casing, and is protected by a strainer 42. The strainer is mounted in a carrier 35 which is held on a boss 36 formed on the plug 21 by a spring 19 which also loads the main valve.
Patent GB-235823-A (GB)
Title: Improvements in key cases
IPC: A45C11/32
Filed: 1925-03-24
Abstract: 235,823. Lorber, C. March 24, 1925. Key holders.-In a key case of the type wherein a metal plate 14 is mounted on a folding strip of leather 11, Fig. 1, and has its end rolled and slotted to receive the ends of key holders, the key holders comprise spiral rings 21. Figs. 1 and 3, the ends being extended to form shanks 20 with flattened heads 22 which lie within the slots 19. The top 17, Fig. 3, of the plate 14 is bent first forwardly, then upwardly and rearwardly so that the open ends of the slots therein are covered by the leather of the case and accidental detachment of the key holders is avoided. The top edge 18 of the plate 14 may lap over the bask of said plate and the slots 19 instead of being open at the ends may have enlargements for inserting the heads of the holders.
Patent GB-527633-A (GB)
Title: Improvements in or relating to dental forceps
IPC: A61C3/14
Filed: 1939-04-17
Abstract: 527,633. Dental forceps. SULLY, H. S., and SEARBY, H. A. April 17, 1939, No. 7918. [Class 81 (ii)]. The jaws 10 of dental forceps are provided with recesses 14 so that, when the jaws are closed, there is provided a tooth-enclosing pearshaped cavity, which cavity has a single opening at the apex of the jaws to accommodate the tooth root. The handles of the forceps may bo at right angles to, or in line with, the jaws. Specification 289/02, [Class 81], is referred to.
Patent GB-421523-A (GB)
Title: Improvements in self-excited apparatus for transforming continuous into alternating current, having vapour discharge tubes with mercury cathodes
IPC: H02M7/44
Filed: 1933-03-16
Abstract: 421,523. Converting. JENAER GLASWERK SCHOTT & GEN., Otto- Schott-Strasse, Jena, Germany. March 16, 1933, No. 7953. Void [Abridged as open to inspection under Sect. 91 of the Acts, Sept. 18, 1933]. [Class 38 (ii)] [See also Group XL] To enable vapour discharge devices having a positive critical ignition potential to be used in a self-excited inverter the centre tap of the transformer winding supplying the grids is connected to a point of positive potential relative to the cathode. The centre tap of the secondary of the grid transformer is connected to an ignition electrode c which is supplied from the D.C. supply through a resistance o. When the D.C. supply circuit is energized this electrode is lifted out of the mercury b by the magnet n, to initiate ignition and in addition, it becomes sufficiently positive with respect to the cathode to raise the grid potential above the critical ignition potential so that the inverter commences to function.
Patent GB-681453-A (GB)
Title: Combination locks with automatic safety closing, particularly for vehicle doors
IPC: E05B37/00
Filed: 1950-03-30
Abstract: 681,453. Permutation locks; latches. PORCHE & CIE. March 30, 1950 [March 30, 1949], No 8001/50. Class 44 In a door locking system for motor vehicles with more than one door in which at least one of the doors (the master door) is provided with a permutation lock as disclosed in Specification 615,716, the latch 13, Fig. 3, is actuated by a push-button 5 rotatably connected with a spindle 6 carrying helical teeth engaging in a nut 11, the end of the spindle being squared and engaging in a follower 9, so that as the button 5 is pressed the spindle rotates the follower which retracts the bolt. The button 5 is mounted in the control knob 1 which in the case of the master-door carries a gear wheel mating with the setting wheel of the lock. Doors other than the master door (i.e. as shown in Fig. 3) are provided with inside locking means comprising a pivoted finger 17 rotatable to engage in a groove 16 and prevent axial movement of the spindle 6. The setting wheel 21, Fig. 10, is operable by the gear wheel on the control knob of the master door or by a separate knob on the spindle 27. Wheels 22, 23 engaging the wheel 21 are adapted when rotated in opposite directions to set the permutation lock. The settmg wheel 21 has a series of axial holes adapted to receive a series of parallel pins 25 mounted on a plate 26 carried on the spindle 27 which is slidable and urged by a spring to the position shown. The spindle 27 may be pressed back to uncouple it from the wheel 21 by a bayonet plug inserted in the socket 34 on the inside of the door. Connected to the latch follower 28 is a slidable rod 29 having a projecting finger 31 adapted to engage the pins 25 when the latch is operated by the outside press-button to scatter the permutation setting. Another disc scattering finger 33, Fig. 7, carried on a second slidable rod 32 secured to the latch bolt is adapted to engage the pins when the bolt is retracted, e.g. by slamming the door. When the uncoupling plug is inserted, the scattering mechanism is inoperative and the knob on the spindle 27 is ineffective. The master door may then be opened freely bv the push button.
Patent GB-883191-A (GB)
Title: Improvements in or relating to sealing units for use in jointing oil-filled electric cables
Inventor: MIRANDA FREDERICK JOHN
IPC: H02G15/26
Filed: 1959-03-09
Abstract: 883,191. Cable joints. PIRELLI-GENERAL CABLE WORKS Ltd. March 9, 1959, No. 8015/59. Addition to 859,131. Class 38 (1). A sealing unit according to the parent Specification is provided with means for anchoring both the chamber 1 and the reinforcing member 7 to the cable sheath 3, whereby longitudinal stretching of the material of the chamber is prevented. The anchoring means comprises a ring 12 located inside the member 7 adjacent a second ring 10 secured to member 7 and a number of metal strips 15 which are bent round the ring 12 and their ends brought out beneath the ring 10 and clamped under clips 5 which secure the neck 2 of the sealing unit to the cable sheath. The ring 12 may be omitted and the strips 15 passed directly round the ring 10. Specification 883,192 also is referred to.
Patent GB-1504964-A (GB)
Title: Fuel mixture control device
IPC: F02D21/10
Filed: 1975-02-26
Abstract: 1504964 Auxiliary air admission P P RAMOS 26 Feb 1975 [27 Feb 1974] 8081/75 Heading F1B A secondary air control device consists of a valve block 10 having a bore 12 through which the secondary air passes to tube 16 and hence to the intake manifold of an I.C. engine. The rate of flow is controlled by valve-member 18 actuated by diaphragm 20, one side of which is exposed to vacuum chamber 22 connected by hose 24 to the Venturi of a carburetter which supplies the engine with air/fuel mixture. The initial stress in spring 26 is adjustable by screw abutment 28. The lowest position of the valve-member is determined by adjustable stop 34. Screw 32 is pre-set to determine the maximum effective cross-sectional area of the bore. Air cleaner 14 is provided.
Patent GB-943194-A (GB)
Title: Improvements in or relating to methods of connecting electrical conductors
Inventor: REES JOHN ALUN
IPC: H01R4/62
Filed: 1959-03-09
Abstract: 943,194. Sleeve connections. ALUMINIUM WIRE & CABLE CO. Ltd. March 7, 1960 [March 9, 1959], No. 8119/59. Heading H2E. Two aluminium wires 1, each having an anodized coating are secured in an aluminium alloy sleeve 2 which is initially cylindrical and is then deformed at 3 to an extent sufficient to provide a mechanical joint between the sleeve and the wires. The sleeve is further deformed at 4 to a greater extent than that required for the mechanical joint and to an extent sufficient to break down the anodized film on the wires and effect an electrical connection between the wires and the sleeve. The two deformations are preferably effected in a single operation. In Figs. 3, 4, connection is made between a single wire 1 having a surface coating or film of electrically insulating material and a metal, e.g. steel, tag or plate 5 having a folded over edge 6 providing a channel into which the wire is laid. The part 6b for forming the electrical connection is compressed to a greater extent than the part 6a which provides the mechanical connection. The method is applicable to copper wires having an enamel insulating coating, and where dissimilar metals are being connected a protective lacquer may be applied to prevent bi-metallic corrosion in a corrosive environment.
Patent GB-589932-A (GB)
Title: Improvements in or relating to the surface treatment of magnesium and its alloys
IPC: C23G1/12
Filed: 1945-03-30
Abstract: In a method of treating the surface of magnesium or magnesium alloys or articles made therefrom to remove inclusions of other metals or alloys, the surface is treated with one or more concentrated acid solutions in which the acid radicals are those of hydrofluoric acid and at least one other strong mineral acid. An example describes the use of a mixture of two parts by volume of hydrofluoric acid (40 per cent. by weight) and one part by volume of nitric acid of specific gravity 1.42.  The surface may be degreased, washed and dipped in a saturated solution of a soluble fluoride before treatment with the acid mixture.  The surface may afterwards be given a chromate treatment according to Specifications 287,450, [Class 82 (ii)], and 353,415 to produce a corrosion-resistant film.
Patent GB-241102-A (GB)
Title: Improvements in aeronautical propulsion
IPC: B64C11/16
Filed: 1925-03-26
Abstract: 241,102. Leslie, Sir B. March 26, 1925. Screw propellers.-An air screw is constructed with a single blade of non-variable pitch.
Patent GB-140469-A (GB)
Title: Improvements in and relating to scooters, hobby-horses, and like toy vehicles
IPC: B62K3/00
Filed: 1920-03-19
Abstract: 140,469. Gilbert Co., A. C., (Assignees of Gilbert, A. C.). March 20, 1919, [Convention date]. Foot-cycles, scooters, hobbyhorses, and like toy vehicles are made as a knockdown construction whereof the parts can be readily assembled and taken apart by a child. The body or platform of the vehicle is formed of a number of perforated elongated members 15 arranged side by side and clamped together by bolts and nuts 17. Fig. 1 shows a scooter according to. the invention, and in order to accommodate part of the rear wheel 11 the middle member 15 of the platform is displaced forwardly relatively to the side members, and the wheel axle 24 is carried by springs 21 bolted at 22 to the side members. The vertical and horizontal holes 16 along the bars intersect. The steering-wheel 12 is mounted in side members 26 bolted to the lower end of the perforated steering-stem 13, a steering-connexion to the platform being effected bv a bolt 43 which passes through the front ends of metal straps 36, 38 bolted to the platform and an arch 34, and through the rearwardly extending arms of a bracket 42 secured to the stem. A hobby-horse with a pair of rear wheels is also described, the seat being supported above a body of bars 15 by an arch, such as 34, and a rear bracket. The wheels of the vehicle may be replaced by runners such as those of sledges. Specification 140,101 is referred to.