baber/WOPTO huggingface dataset:
Patent GB-184247-A (GB)
Title: Improvements in safety retaining mechanism for mine cages
IPC: B66B5/18
Filed: 1921-05-03
Abstract: 184,247. Lang, F. J. May 3, 1921. Cage grips applied by fluid-pressure-actuated mechanism at the pit-head.-Brake mechanism for shoes on the cage is actuated by the piston of a cylinder at the pit-head to which steam is admitted when the hoisting-rope breaks. The hoisting-rope A passes over a pulley B at one end of a lever L which is pivoted at J to extensions O of the pit-head framing P and carries a weight W. A link H connects the lever L to the handle C of a cock controlling the admission of steam to the cylinder G. The piston-rod D is pivoted to a framing M pivoted at Q on each side of the framing P and pivotallv supporting vertical rods E, Fig. 1. The rods E are connected by pivoted links N to rods F. When the rope A breaks, the weighted end of the lever L descends and steam is admitted to the cylinder G. The upward movement of the piston-rod D and the consequent downward movement of the rods E causes the application of the rods F to brake shoes on the cage.
Patent GB-561670-A (GB)
Title: Improvements relating to the production of chemical coatings on ferrous surfaces
IPC: C23C22/76
Filed: 1942-08-11
Abstract: 561,670. Coating ferrous metal. PYRENE CO., Ltd., (Parker Rust-Proof Co.). Aug. 11, 1942, No. 12667/43. Divided out of 561,504. [Class 82 (ii)] In the production of a corrosion-resistant and paint-holding coating on a ferrous surface by the chemical reaction of a coating solution applied by spraying, immersion of the surface in the solution or causing the solution to flow over the surface, the coating action is accelerated by the action of rollers having yielding surfaces which move in contact with, and at the same surface speed as, the surface to be coated, some of the rollers being positively driven so that they convey the sheet forward as well as accelerating the coating, the rollers pressing their solution into contact with the surface to be coated without exerting any scrubbing action. The sheets 1, fed by conveyer rollers 2, enter a chamber 3 containing pairs of rubber-covered rollers 4 which grip both sides of the sheets and convey them forwards and while the sheets are in this chamber they are sprayed with water from nozzles 7 in transverse pipes 15 and fed from pipes 5, 6. The sheets emerge on to conveyer rollers 11 and are carried into a chamber 12 where they are sprayed with a phosphate solution from nozzles 13 and are engaged by rubber-covered rollers 14 arranged singly or in pairs, there being thirty pairs of rolls and thirty single rollers. The nozzles are fixed to transverse pipes 16 arranged in groups of ten pipes each fed by a header 17 through a pipe 23, fed by a pipe 18 through a pump 21 from a tank 19. The solution runs off the sheets on to inclined parts 24 of the chamber 12 or on to a hood 25 and thence into troughs 26 from which it overflows into a V-shaped settling chamber 27. Sludge is removed from the chamber by a pump 29. The coated sheets pass through a chamber 32 where they are washed by water from nozzles 35 and thence into a chamber 41 where they are sprayed with dilute chromic acid by nozzle 43. Other coating solutions, e.g. those described in Specification 362,956, may be used. Specifications 346,401 and 386,739** are also referred to.
Patent GB-1222041-A (GB)
Title: Improvements relating to pipe fittings
IPC: F16L41/02
Filed: 1969-03-11
Abstract: 1,222,041. Forming pipe fittings. JOHNSMANVILLE CORP. 11 March, 1969 [19 March, 1968], No. 12667/69. Heading B5A. [Also in Division F2] A method of forming pipe fittings comprises the steps of winding resin-impregnated filaments, e.g. glass fibres, around a mandrel 2 which is formed from a pair of tubular sections 6, 14 at an angle to each other, forming a bulging exterior surface 26 adjacent the area of the intersection of the tubular sections, winding the filaments 42 over the bulge in a criss-crossing arrangement and over the other portions of the mandrel, curing the resin, e.g. an epoxy resin, to a hardened state, and finally removing the mandrel. Prior to winding of the filaments, the mandrel is covered with a gel coat, e.g. a polyurethane composition, which is allowed to advance to the partially cured or set stage. As shown, the mandrel is of T-form and comprises a number of separable parts including a tube 6 provided with end caps 8 held in place by a bolt 10, a tube 15 having an end cap 16 secured in place by a bolt 18 connected to the bolt 10, and a pair of mating members 22 forming the bulge 26 which is of ellipsoid or spherical shape. Socket ends may be formed on the fitting by providing sleeves 28 of resilient material such as rubber and having annular ribs 30. The winding of the filaments is firstly effected on the stem 14 by mounting the mandrel in a rotatable holder 32, and afterwards winding the filaments around the body portion 26 and arms 4 of the mandrel by synchronized rotation of the mandrel and reciprocation of the filament guide means.
Patent GB-145934-A (GB)
Title: Improvements in and relating to counting apparatus for marine engines and analogous purposes
IPC: G06M1/06
Filed: 1919-05-20
Abstract: 145,934. Fitzsimons, R. R., Swaine, W. C. T., and Cutting, A. R. May 20, 1919. Counters actuated by revolving mechanism, movements counted independently of direction of moving part.-Relates to revolution-counters for the shafts of marine engines &c., of the kind in which a weight holds the pivotally-mounted counter so as to be driven by the shaft, and in which the count is continuous, irrespective of the direction of rotation of the shaft and a sealed protecting-casing is fitted. The counter m is fitted on a carrier g mounted with ball bearings on a spindle f concentrically secured to the end of the main shaft which ends in a plate c. The weight h is carried on bolts j attached to the carrier and has clearance holes to facilitate fitting the weight on the bolts in assembling. The counter spindle n projects and is fitted with a pair of reversely-set ratchet or " free " wheels o, p one of which gears direct and the other through an intermediate pinion with a pair of toothed wheels r, q on the spindle f. This gearing gives continuous counting irrespective of direction of rotation of the shaft. A flanged screwed ring d is secured to the plate c on the end of the shaft and carries screwed on it, locked by set screw z<2> and seal z', a fixing ring x on which is permanently but revolubly mounted the casing v. The casing v is secured to the ring x between a split ring y attached by screws to the ring x and an air and water-tight packing z backed by springs. A ball bearing u for the end of the spindle f is fitted in the casing which has also a glazed reading aperture w. Normally the casing revolves with the shaft, but can be held by the hand during a reading.
Patent GB-1024393-A (GB)
Title: Process for polymerizing n-carboxy-ª-amino acid anhydrides
IPC: C08G69/10
Filed: 1964-03-25
Abstract: A method of making polyamino acids comprises polymerizing N-carboxy-DL-a -amino acid anhydrides containing at least one asymmetric carbon atom in the presence of an organic compound having an asymmetric carbon atom and an active hydrogen atom (which may be enolizable) and as catalyst, an organo metallic compound of a metal of Group I, II or III of the Periodic Table, or, in the presence of an organometallic compound, which contains an asymmetric carbon atom, of a metal of Group I, II or III of the Periodic Table.  The process is stated to be stereo-specific with respect to the asymmetric carbon atom of the anhydride. Specified anhydrides are those of alanine, leucine, nov-valine, isoleucine, a -phenyl alanine, aspartic acid, glutamic acid, O-benzyl senine, O-acetyl serine, O-acetyl threonine, e -acetyl lysine, e -carbobenzoxy lysine, d -acetyl ornithine, methionine and mixtures thereof. Specified catalysts are: (1) those containing an asymmetric carbon atom and having the formulae MRnmHm or LiAlR4-pHp where M is the metal of valency n, m is 0, 1 or 2, p is 0, 1, 2 or 3 and R is an alkenyl, alkyl, cycloalkyl, arylalkoxy, aryloxy, dialkyl amino, alkyl aryl amino, alkyl thio, cycloalkyl thio or acyloxy group having an asymmetric carbon atom; or (2) organometallic compounds of the formulae MRn-mHm or LiAlR4-pH-p where M, R, n m and p are as defined above, many such compounds being exemplified.  Many organic compounds containing asymmetric carbon atoms are specified.
Patent GB-1172310-A (GB)
Title: Improvements in Electrical Signal Limiters and Related Devices
Inventor: DEANE REGINALD LEONARD
IPC: H03G11/00
Filed: 1967-03-17
Abstract: 1,172,310. Automatic gain control. BRITISH BROADCASTING CO. 27 March, 1968 [17 March, 1967], No. 12733/67. Heading H3T. In a compressor circuit comprising a variable gain element and a control circuit for controlling the gain thereof, the time in which the control circuit responds to a decrease in signal amplitude varies with the signal amplitude while the time in which the control circuit responds to an increase in signal amplitude is not so varied. The gain of variable gain element 21 is controlled by a control circuit comprising full-wave diode rectifiers D1, D3, having a time-constant circuit comprising capacitor C1 and resistor R1 in shunt with which is resistor R4 in series with the drain to source path of a field effect transistor TR. A second control circuit comprising full-wave diode rectifiers D2, D4 provided with delay bias source 20 controls the gate potential of field effect transistor TR via smoothing circuit R2, C2 and a voltage-limiting Zener diode Z in conjunction with resistor R3. At small signal levels diodes D2, D4 are non-conductive, fieldeffect transistor TR biased to low impedance, and resistor R4 shunted across resistor R1 giving an automatic gain control of short return time-constant. On large signals, however, diodes D2, D4 become conductive and bias field-effect transistor TR to high impedance, whereby the return time-constant of the automatic gain control is determined by resistor R1 alone and is high.
Patent GB-1216717-A (GB)
Title: A high storage density information store for recording signals in grooves
IPC: G11B11/00
Filed: 1968-03-15
Abstract: 1,216,717. Recording and playback. TELDEC 'TELEFUNKEN - DECCA SCHALLPLATTEN G.m.b.H. 15 'March, 1968 [16 March, 1967], No. 12797/68. Heading G5R A broad frequency band signal is recorded in a grooved record by mechanical deformation of a magnetic portion of the groove, the signal components having a wavelength longer than a predetermined limit modulating a carrier of wavelength shorter than the limit. This arrangement is said to improve-storage density. The remaining signal components are either mechanically recorded directly or by modulation of the same or an auxiliary carrier of wavelength shorter than the limit. The magnetic portion 18 may be located on the lands separating adjacent grooves for playback by a magnetic head riding on the lands or (Fig. 4, not shown) the portion may form one groove wall, the record being played back by a magnetic head riding in the groove. Sound and vision signals may thus be recorded. The inherent remanence of the record or an auxiliary biasing field are employed for playback. Therecord may be copied by pressing.
Patent GB-477875-A (GB)
Title: Apparatus for producing harmonic frequency electrical waves from a base frequency
IPC: H04J1/06
Filed: 1937-05-05
Abstract: 477,875. Frequency changing. STANDARD TELEPHONES & CABLES, Ltd. May 5, 1937, No. 12831. Convention date, May 5, 1936. [Class 38 (ii)] In a frequency changer comprising an inductance L having a saturable core and energized from a source of base frequency 10 to produce a group of harmonics, the primary circuit being tuned to the base frequency by a condenser Cl and aircored inductance L1 of greater magnitude than the inductance L, the secondary circuit comprises a capacity C and a resistive load R whereby substantial uniformity in the magnitude of the harmonics is ensured. The resistive character of the load may be obtained by using a bank of filters 35, Fig. 2, tuned to the different odd harmonics required and coupled through a transformer 34 to the output circuit 30. Where even harmonics are required, a bridge arrangement of rectifiers 36 may be employed as shown with a bank of filters 38 tuned to the even harmonics and connected to the rectifier bridge through a transformer 37.
Patent GB-280606-A (GB)
Title: Apparatus for amplifying electric oscillations
IPC: H03F1/16
Filed: 1926-05-19
Abstract: 280,606. Marks, E. C. R., (Radio Frequency Laboratories, Inc.). May 19, 1926. Thermionic amplifiers.-A thermionic amplifying system comprises .a plurality of stages in cascade each including a valve, a plurality of impedances forming a balanced alternating-current Wheatstone bridge, having two conjugate arms comprising respectively the input circuit L1 and the output circuit L5, C5 of the stage, means, such as a grid-bias battery, for imparting a negative potential to the grid G to reduce the grid current, means, such as a large condenser C. for making the filament F a substantially equipotential surface with regard to alternating currents, and means, such as a condenser C, for balancing the bridge when the filament is emitting, and means, for example a screen, to shield the stage from external coupling. The output circuit is connected between the plate P and filament F of the valve and the input circuit is connected between the grid G and the fourth junction X of the bridge, the arm FG consists of the gridfilament capacity Cg of the valve and the balancing capacity C1, the arm GP consists of the gridplate capacity Cm of the valve, the arm PX consists of the inductance of the end La adjacent the plate of a plate coil L4, and the arm XF comprises the mutual inductance M between the end Lb of the plate coil adjacent the filament and a coil L6 coupled to it and connected through the grid-bias battery to the filament and forming part of the input circuit. Stages of the above character are associated with amplifying-stages having a higher amplification factor, that is in which the inherent reaction is not neutralized. All the amplifying stages are tuned simultaneously by a single control by means of coupled variable condensers. According to a modification the high-tension battery is placed between the two parts of the plate coil.
Patent GB-825471-A (GB)
Title: Brake mechanism for sound recording and reproducing apparatus
IPC: G11B15/22
Filed: 1958-04-23
Abstract: 825,471. Magnetic sound recording and reproducing apparatus. PROTONA PRODUKTIONSGESELLSCHAFT FUR ELEKTROAKUSTISCHE GERATE G.m.b.H. April 23, 1958 [April 24, 1957], No. 12868/58. Class 40 (2). The brakes for a tape- or wire-recorder are applied by elastic means such that the braking forces are gradually variable. Separate brakes, acting on the take-up spool or its spindle (and a corresponding pair acting on the other spools during rewind) control stopping and running respectively. The brakes are mounted in pairs, one above the other, on fixed posts, one of which is shown at 2, and are all of the form of Fig. 3, where a flat spiral spring 5 urges a doublearmed lever 4 in a clockwise direction so that the friction member 12 coacts with the spool or its spindle, the frictional force being dependent in amount on the position of the gradually variable adjustable anchorage 5a. This anchorage takes the form of a lug 6c on a gear-wheel 6, which serves also to maintain the components of the assembly coaxial. Two pinions engage respectively the gear-wheel 6 and a corresponding gear-wheel 9 associated with the lever 7 forming part of the other brake. In the embodiment illustrated, one pinion, associated with the lower brake, is actuated by ratchet means (Figs. 2, 4, not shown) located below the tapedeck on the pinion shaft, while the other pinion is actuated by a worm engaging it directly. Two control keys (Fig. 5, not shown) operate switches and also coact with linkages acting on the lever arms such as 4e to release such brakes as are not required to function during any particular manner of operation of the apparatus.
Patent GB-238934-A (GB)
Title: Improvements in and relating to thermionic vacuum tubes or valves
IPC: H01J1/15
Filed: 1924-05-26
Abstract: 238,934. Seymour, C., Hushes, H. G., and Cantelo, H. R. May 26, 1924. Vacuum tubes. - Filament systems for thermionic valves, particularly for multi-filament valves with cylindrical anodes, comprise two or more parallel wires mounted and supported separately for individual replacement and maintained in tension by the weight of a metal end-plate C to which the wires are secured and of one or more central rods D. The wires are evenly distributed on a cylindrical surface to give even electronic emission. When more than two wires are used and are taken to separate seals, they may be connected in circuit in parallel or series-parallel as desired. Straight wires A of tungsten may be secured at their upper ends as described in Specification 204,237 to a cylindrical insulator E through which slides the central metal rod D carrying the disc C. The lower ends of the wires A are bound or pinched to metal rods B secured to the disc C by nuts H. Upward movement of the rod D is prevented by a nut F and the lower end of the rod may be guided. In a modification, the upper end of the rod D slides through an insulating bush in an upper metal disc similar, and secured to the wires in similar manner, to the lower disc C. The filament leads may then be connected by nuts to the rod D and to the upper disc so that the wires are in parallel. In a further modification, the grid framework has two insulating projections each supporting the ends of the wires, as described in Specification 204,237.
Patent GB-1206563-A (GB)
Title: A non-corrosive polyvinylidene chloride latex
IPC: C08K3/30
Filed: 1969-03-12
Abstract: 1,206,563. Fabrics &c., coated &c. A. E. STALEY MFG. CO. 12 March, 1969 [10 April, 1968], No. 12899/69. Heading B2E. [Also in Division C3] Paper is coated with polyvinylidene chloride latices treated with a reducing metal sulphite to render the latex non-corrosive. Preferred sulphites are sodium, potassium or lithium bisulphite, and potassium or particularly sodium metabisulphite. Treatment is effected at a pH below 5.5 using 0.7-1.3 equivalents of sulphite per equivalent weight of residual peroxide. In the examples the polymer is a copolymer with methyl acrylate, acrylic acid and 1,3-butylene dimethacrylate. Glassine is coated with two coats of 50-55% solids emulsion to obtain coats of 5-10 lbs./3000 sq. ft.
Patent GB-747766-A (GB)
Title: Improvements in fluid-pressure operated hand tools
Inventor: BATES FREDERICK IVAL
IPC: B23D17/06
Filed: 1953-05-11
Abstract: 747,766. Stamping, punching and riveting. BATES, SON & JOHNSON, Ltd. July 19, 1954 [May 11, 1953], No. 13065/53. Class 83 (4). [Also in Group XXIII] A fluid-pressure-operated tool for shearing, stamping and riveting of the type comprising a body portion 10, provided with a cylinder 11 housing a piston 16 connected to a pair of jaws 14 pivoted to the body portion and a pneumatic valve 22 for operating the piston is characterised in that the jaws are formed with cam faces 19 which coact with rollers 20 on the piston-rod 17 to impart a progressively increasing closing pressure to the jaws on movement of the piston. The piston is spring-loaded in the forward position and leaf springs 21 hold the cam faces 19 in contact with the rollers 20. The transversely movable spring-loaded valve 22 has an inner port 26 which in the inoperative closed position of the valve places the cylinder in communication with the atmosphere via the bore of the valve and an outer port 28. When the valve is depressed to close the jaws the outer port 28 is closed and compressed air is admitted to the cylinder from the inlet 23 via a chamber 32 and an annular groove 31 surrounding the valve. Manual depression of a trigger 33 pivoted to the body portion of the tool raises the piston slightly to cause the jaws to exert a preliminary loading grip on the work.
Patent GB-310481-A (GB)
Title: Improvements in shock absorbers for automatic fire arms
IPC: F41A3/78
Filed: 1929-04-26
Abstract: 310,481. Ceskß Zbrojovka Akciova Spolecnost v. Praze. April 26, 1928, [Convention date]. Breech actions, sliding breech-block; stocks. - A spring buffer 30 for a sliding breech-block (not shown) is combined with a bayonet-jointed locking device which serves to fasten the stock 25 to the gun body 23. In the form shown, the buffer is housed in a sleeve 26 rotated on the stock by turning the spindle 31 of the buffer disc 33 which has projections 34 engaging recesses in the sleeve. The stock closes on the body by a turning movement which brings the rim of the sleeve through a slot 28 in the body, the sleeve being then turned to engage the flange 27 thereon with the body.
Patent GB-860936-A (GB)
Title: Improvements in or relating to blast furnace system
IPC: C21B9/10
Filed: 1959-04-17
Abstract: 860,936. Blast furnace processes. KOPPERS CO. Inc. April 17, 1959 [Oct. 3, 1958], No. 13171/59. Class 72 A blast furnace system having hot and cold blast mains comprises a gas burner in the hot blast main at a point after a thermo-responsive element, an air line from the cold blast main after a snort valve to supply air for combustion of the gas to raise the temperature of the hot blast above that of the air coming from the stoves, and a proportioning valve in the combustion air line with means responsive to changes in the rate of flow of the combustion air to regulate the volume of air supplied to the burner. As shown, air is supplied to a blast furnace 10 from a blower 12 through stoves 11 and a main 13. A cold blast main 9 delivers air past a snort valve 16 to a by-pass mixer line 17 and to a line 18, the line 17 discharging into the combustion chambers of the stoves 11. The hot blast main 13 is provided with a gas burner 22 supplied with combustion air through a line 24 from a point in the cold blast main 9 between the by-pass line 17 and the snort valve 16. The line 24 is provided with a butterfly valve 25 and an orifice plate 26 and means for operating the valve 25 in accordance with changes in pressure across the orifice plate 26, to maintain a constant proportion of combustion air to gas. The air supply to the by-pass mixer 17 and the cold blast to the stoves is adjusted by butterfly valves operated in response to variations in temperature detected by one or more thermocouples in the hot blast main before the burner.