baber/WOPTO huggingface dataset:
Patent GB-608072-A (GB)
Title: Improvements relating to the construction of safety valves
IPC: F16K17/06
Filed: 1946-02-14
Abstract: 608,072. Safety valves. HOPKINSONS, Ltd., and BROWN, R. L. Feb. 14, 1946, No. 4701. [Class 135] In a high-lift safety valve of the kind in which a cylindrical extension on the valve member a slides in an adjustable sleeve or valve guide d, the sleeve is keyed to a fixed bush f and has a threaded portion projecting above the bush for engagement by a nut h held in the valve casing and formed externally as a wormwheel for engagement by a worm on an externally adjustable spindle. The projecting end of the spindle is shaped to fit a key and on removal of the latter is shrouded by a removable cover o to prevent unauthorised interference with the valve. The bush f has a flanged head and the nut h is confined between antifriction washers i, j. The sleeve d is held against rotation by a key e.
Patent GB-573842-A (GB)
Title: Improvements in or relating to sheet materials comprising polyvinyl chloride
IPC: C08K5/00
Filed: 1942-04-10
Abstract: Sheet material is made by rolling at a raised temperature a gelatinized composition comprising (a) polyvinyl chloride, (b) polymethyl methacrylate and (c) a liquid plasticizer, the proportion of (b) to (a) and the proportion of (c) to (a) + (b) + (c) both being such as to yield a strong non-tacky product and to permit the composition to be rolled at a temperature, e.g. 210-240 DEG  F. at which no substantial volatilization of the plasticizer occurs. Suitable plasticizers are tricresyl phosphate and dibutyl or diheptyl phthalate.  The proportion of polymethyl methacrylate may be 2 1/2 to 25 per cent by weight of the polyvinyl chloride and the plasticizer comprises 25-55 per cent of the weight of the composition.  The composition may be rolled on to a substitute of paper or fabric. Preferably the polymethyl methacrylate is dissolved at a raised temperature in the plasticizer and the solution hot milled with the finely-divided polyvinyl chloride.  Pigments, dyestuffs and fillers may be added. Surface brilliance may be imparted to the sheets by fusing the surface without using pressure, e.g. by radiant heat. Specification 573,839 is referred to.
Patent GB-556104-A (GB)
Title: Improvements in or relating to apparatus for tracing contours
IPC: B23Q35/127
Filed: 1941-10-27
Abstract: 556,104. Copying-machines. TRINKLE, D. R. Oct. 27, 1941, No. 4724/43. Drawings to Specification. Divided out of 556,070. [Class 83 (iii)] In a method of tracing the outline of a work piece, a tracer co-operates with a pattern comprising an electrically-conducting line on a non- conducting sheet, and small increments of movement are imparted to the tracers, the direction of such movements being controlled according to whether or not the tracer is in engagement with the conducting line. The tracing apparatus is the same as that described in Specification 556,070 which is referred to.
Patent GB-105117-A (GB)
Title: An Improved Transmission Gear for Sewing and like Machines.
Inventor: THOMSON WILLIAM TAYLOR
IPC: D05B69/16
Filed: 1916-04-01
Abstract: 105,117. Thomson, W. T., and MacDonald, W. B. April 1, 1916. Sewing-machines; starting and stopping gear.-Transmission gear for sewing and like machines, of the type having a piston clutch and a brake member so arranged that the clutch and brake members are simultaneously operated, is characterized by a clutchoperating wedge fork g, Fig. 1, made with an extension g<2> carrying the brake o. The inclined face of the wedge, which is operated by a spring- controlled treadle-actuated lever h, cooperates with the end of a bracket f, through which the shaft passes to move the pulley b against the driving-disk d. The mechanism may be duplicated, as shown, for two machines operated from the same shaft. The driving-disks d may be provided with guards n supported by a bracket m secured to the bracket f.
Patent GB-917557-A (GB)
Title: Process and apparatus for detecting foreign objects in the ground
IPC: G01V3/15
Filed: 1959-02-11
Abstract: 917,557. Radar. ELTRO GES. FUR STRAHLUNGSTECHNIK. Feb. 11, 1959 [Feb. 12, 1958], No. 4860/59. Class 40 (7). In a detector for non-metallic land wires, electromagnetic energy is transmitted into the ground and part is reflected upwards from the wire due to the boundary charge of dielectric constant at the wire. Energy from klystron 6 is transmitted to the ground surface by the horn 5. Reflections from the target are directed to the receiver by the horn 7. The relative position of 5 and 7 are adjusted by the screws 2 and 2<SP>1</SP>. The klystron output may be heterodyned with a low-frequency signal or itself varied periodically.
Patent GB-510467-A (GB)
Title: Improvements in or relating to taps and cocks for fluids
IPC: F16K11/048
Filed: 1938-02-16
Abstract: 510,467. Valves. BOYS, L. J. Feb. 16, 1938, No. 4885. [Class 135] A multiple-way valve device particularly adapted for use in water-softener control-systems has part of the valve member adapted to slide in a ported cylindrical chamber and another part adapted to co-operate with an annular seat. In the form shown in Fig. 1, the valve casing is provided with four inlet or outlet ports 14, 15, 18, 19 and two opposed annular seats 20, 21 on opposite sides of the port 15. Valve member parrts 23, 25 fitted with washers 24, 26 are secured to a spindle 22 guided in a spider 27, the member 23 being a sliding fit in the bore. When the part 25 is in engagement with the seat 21, ports 14 and 15 are in communication, while communication between ports 14, 18 and 15, 19 is interrupted. In the'other position of the valve member ports 14, 15 communicate respectively with ports 18, 19, while communication between ports 14, 15 is interrupted. In a modification, cylindrical or tapered protuberances are fitted below the valve parts co-operating with the casing bore for delaying opening or restricting flow. The cylindrical protuberance may be slotted to form a spindle guide. In another form the part 23 slides in a reduced part of the casing and serves as a piston closure member for the three ports 14, 15, 18. The device is actuated by a screw-driven spindle connected to the valve spindle by a washer shaped as shown in Fig. 5 fitting within internal and external annular channels, one of which is formed on the actuating spindle and the other on the valve spindle or a member carried thereby. According to the Provisional Specification the first closure member may not be a close fit in the bore so that a permanent connection is maintained between two of the ports. In a further modification, the first closure member is not made a watertight fit in the bore, but a third closure member is arranged back to back with the first member and co-operates with its own seating. A rubber gasket is arranged between two closure members to take up slight maladjustments between the closure members and their seatings.
Patent GB-215852-A (GB)
Title: Improvements in apparatus for spraying liquids
IPC: B05B3/02
Filed: 1923-02-20
Abstract: 215,852. Burdick, C. L. Feb. 20, 1923. Spring gears operating in both directions.-Compressed air apparatus for rotating a spray-producer comprises a cylinder 5 reciprocating on a fixed piston 4, Fig. 2, supported by tubes 3, 3' provided with ports 14, 14<1>. The supply and exhaust of air to and from the cylinder is controlled by means of a plug cock operated by means of a rocking lever 19. The cylinder carries a frame 21 in which slides a rod carrying a roller 23, acted on by a spring 25, Fig. 3. The roller runs up the lever 19 until it engages a loosely pivoted cam 21, Figs. 1 and 4, which it turns over and then rides up the cam until it passes the adjustable tip 21<1> when the spring forces the roller down on the other side of the lever 19 and thus reverses the valve.
Patent GB-728712-A (GB)
Title: Process for producing explanatory texts on the pictures of photographic films
IPC: G03D5/04
Filed: 1953-02-23
Abstract: 728,712. Producing text on photographic film. WEBER, H., and WEBER, J. Feb. 23, 1953 [March 5, 1952], No. 4928/53. Drawings to Specification. Class 98 (2). In a process for producing explanatory texts on photographic film the photographic emulsion with the exception of the areas corresponding to the letters of the text to be produced, is masked by a protective layer, e.g. paraffin wax, and an etching agent is sprayed onto the film. The reagent may be sprayed from one or more nozzles spaced along the path of the film, the latter being moved past the nozzles by passing it over rollers. The nozzles may produce a circular or flat jet. The amount of reagent applied to the film may be controlled by means of cocks on the nozzles or by varying the pressure. A spraying apparatus is described. The etching agent may be Javelle water or nitric acid. Specification 411,335 is referred to.
Patent GB-1418734-A (GB)
Title: Pneumatic tyres
IPC: B60C29/02
Filed: 1973-01-31
Abstract: 1418734 Valves MICHELIN & CIE (COMPAGNIE GENERALE DES ETABS MICHELIN) 31 Jan 1973 [1 Feb 1972] 4933/73 Heading F2V A valve for a tubeless pneumatic tyre comprises a rigid pipe 10 surrounded by a rubber sheath 20, the pipe being extended as at 15 so that when the valve is installed in a wheel rim the hand of the sheath 26 is deformed radially inwardly to hold the whole valve in the rim against the deflecting effect of centrifugal force. The sheath has an annular cavity 25 and the internal diameter of the head is substantially smaller than that of the cavity.
Patent GB-1438241-A (GB)
Title: Method for producing reinforced pile in earth situs under low  headroom conditions
IPC: E02D5/38
Filed: 1974-02-04
Abstract: 1438241 Concrete pile; bored earth &c L A TURZILLO 4 Feb 1974 [3 May 1973] 04980/74 Headings E1F and E1H A concrete pile P is formed in earth E by screwing. a continuous flight auger 11 into the earth to form a cavity of requisite depth. The augered earth is removed by rotating the auger in the screwing direction while holding the auger against movement in the cavity. The space in the cavity is then filled with cementitious material which is allowed harden with the auger embedded in it.
Patent GB-511513-A (GB)
Title: Improvements in or relating to precious metal alloys for use at high temperatures
IPC: C22C5/04
Filed: 1938-02-18
Abstract: 511,513. Alloys. POWELL, A. R., BOX, E. R., and JOHNSON, MATTHEY, & CO., Ltd. Feb. 18, 1938, No. 5133. [Class 82 (i)] An alloy for use in apparatus, e.g. bushings, for the production of glass fibres from molten glass comprises platinum or iridio-platinum (containing up to 10 per cent. of iridium) with 1-10 per cent. of gold.
Patent GB-557452-A (GB)
Title: Improvements in carrier-wave communication systems
IPC: H04J1/04
Filed: 1942-04-17
Abstract: 557,452. Multiplex transmission. WATSON, S. N., and WORSWICK, T. April 17, 1942, No. 5158. [Class 40 (iv)] A carrier telephone channel TP1 transmitting only the lower side-band is connected to one-way lines L1, L2 through band-pass filters BPF while a telegraph channel TG operating with the same carrier frequency modulated with sub-audible signals is connected through a high-pass filter HPF and balanced impedances R. A second telephone channel TP2 operating at voice frequency or at a lower carrier frequency may be connected to the lines through low-pass filters LPF.
Patent GB-1418062-A (GB)
Title: Battery chargers
IPC: H02J7/02
Filed: 1973-02-01
Abstract: 1418062 Battery charging systems INPEL (PTY) Ltd 1 Feb 1973 [7 Feb 1972 13 Oct 1972] 5176/73 Heading H2H [Also in Division G3] Apparatus for charging a battery comprises a diode bridge rectifier 4 connectable to a mains supply 1, a D.C. to D.C. converter 5 controlled by a pulse width modulator 6 and a current detector 8 for controlling the output current of the converter. To ensure that sufficient output power is provided for charging the battery, several similar apparatuses 2, 3 may be connected in parallel and controlled by a central control circuit 7. The current detector 8 is of the current mirror type and provides an output 42 to the modulator 6. The modulator 6 supplies control pulses on output leads 42 to the bases of transistors in a bridge drive circuit for an output power transistor in the converter 5. The detector 8 and the modulator 6 control the output power transistor which is connected in series with the battery to ensure that a constant current is supplied to the battery. The converter may comprise thryristors instead of transistors.
Patent GB-472741-A (GB)
Title: An improved hydro-pneumatically operated clamping or like device
IPC: B25B1/18
Filed: 1937-02-22
Abstract: 472,741. Metal - working presses; riveting. SCIAKY SOC. ANON. DE CONSTRUCTION DE MACHINES DE SOUDURE, DE CHAUFFAGE, ET DE FORGEAGE ELECTRIQUES. Feb. 22, 1937, No. 5239. Convention date, Feb. 21, 1936. [Class 83 (iv)] [Also in Group XXIII] A hydro-pneumatic clamping or like device is used for replacing hand vices, screw presses or assembling bolts and can be used as a riveting punching or like machine or of being fitted on a spot welding machine. As shown, a fixed clamping head 20 is attached by a screw coupling 18 to a cylinder 2 provided with a piston 1 having oppositely arranged cup leathers 3. The piston has a rod 4 carrying an enlargement or nut 23 surrounded by a cylinder 21, which contains liquid and carries the movable clamping head 22. Packings 24, 25 prevents leakage of the liquid, which is forced into a space 27 as the piston rod 4 enters the cylinder 21. Compressed air is led to opposite sides of the piston 1 by a valve 8. A recess 16, in the valve is capable of establishing connection between a channel 5 and exhaust port 11 or inlet port 14. A recess 17 correspondingly connects a channel 6 with an exhaust port 12 or inlet port 15. Admission of air into the space A of the cylinder 2 forces the piston rod 4 into the cylinder 21 which is forced forward to clamp the work. On admission of air to' the space B of the cylinder 2 the piston rod 4 is forced back and the enlargement 23 engages the cylinder 21 to return it to position. In a modification for mounting on a spot-welding machine, the space 27 communicates with a supply tank through a ball valve to supply liquid to the space 27, a spring being interposed between the enlargement 23 and the head 22 to maintain them normally in the same relative position. A sliding piston also controls a connection between the tank and the space 27 and the rod of this piston carries a second piston controlling connections between a chamber and the two sides of the cylinder 2.
Patent GB-911399-A (GB)
Title: Improvements relating to ironing presses
IPC: D06F71/36
Filed: 1961-02-13
Abstract: 911,399. Ironing presses. MASCHINENFABRIK P. PFENNINGSBERG G.m.b.H. Feb. 13, 1961 [March 24, 1960], No. 5270/61. Class 138 (2). A small ironing press is fitted with an auxiliary shoe for ironing, e.g. cuffs; the upper and lower parts 7, 8 of the shoe being attached to the main pressure-plate 5 and press table 2, respectively; and the height of at least one of the parts is adjustable. The faces of the upper and lower shoe parts 7, 8 include dissimilar angles (Fig. 2, not shown) whereby the fabric is in tension when being pressed in the shoe. As shown, the upper shoe part 7 is rigidly fixed to the main pressureplate 5, whilst the lower part 8 can be raised and lowered by means of a handle 9 and linkage 18, 19, having a dead-centre position for fixing the part 8 in its raised position.
Patent GB-940459-A (GB)
Title: Improvements in or relating to percussion fuzes for unrifled shells and other unrifled projectiles
IPC: F42C15/188
Filed: 1961-02-13
Abstract: 940,459. Ammunition fuzes. JUNGHANS A.G. GEB. Feb. 13, 1961 [Feb. 11, 1960 (2); June 21, 1960], No. 5312/61. Heading F3A. percussion fuze for unrotated projectiles, which can be set for delayed or instantaneous action as in Specification 905,963 by adjusting a screw 13, is provided with additional safety means for securing the striker 16. As in Fig. 6 of the prior Specification, an annular disc 28 surrounding the striker head 24 forms an abutment for a flange 26 to limit the forward movement of the striker by spring 30. During transport, the firing-pin 25 engages a blind bore in the rotor 14 as in the prior Specification. To prevent the striker 16 moving to the armed position and so withdrawing the pin 25, a resilient latch of sheet steel engages in a groove 33 by means of arms 34, 35, Fig. 2. The latch, fixed at one end to the clockwork, is bent at the other end around the locking bolt 21. A transparent cap 41, closing the nose of the fuze, may be replaced by a transparent diaphragm. Through this closure, it is possible to see whether the fuze has become armed accidentally, e.g. by fracture of the latch 32. To render this easily ascertainable, the striker assembly may be as in Fig. 6, where the firing pin 25 is inserted in a tapered body 44 of red synthetic plastic. The body 44 terminates in a cup 46 of stepped diameter closed by a striker head 47 of white plastics. If the fuze is armed, the head of the striker is pushed outwards by the spring 30 and the red part of the head is visible through the window 41. To prevent premature ignition, a spring 50 is placed in the cup 46 with its two ends bent into eyelets extending through the cup into frictional engagement with the wall of the fuze bore 29. When the striker is thrust forward by spring 30, spring 50 expands and the eyelets (52, 51) come to rest against a shoulder 49 and so prevent return of the striker until the spring 50 is deformed on impact. The cover-plate 23 of the timing mechanism may have a resilient arm 56, which secures the inertia bolt 21.
Patent GB-813775-A (GB)
Title: Improvements in or relating to band-saws
IPC: B27B15/02
Filed: 1957-02-15
Abstract: 813,775. Straightening. VISRAM, Q. A. A. A. Feb. 14, 1958 [Feb. 15, 1957], No. 5317/57. Class 83 (4). [Also in Group XXIII] The blade 1 of a band-saw is kept " tensioned," i.e. expansion of the edges of the blade and contraction of its centre portion are prevented, by means of at least one roller having its axis parallel to the axes of the saw pulleys 2, 3 and associated with magnetic means for constraining the blade into uniform contact across its width with the roller. As shown, two spaced rollers 12, 13 are provided on a member 9 carried on the machine framework and a permanent or electromagnet 16 between the two rollers constrains the blade upwards to contact the rollers, the radius of curvature induced being somewhat less than the radius of curvature round the pulleys but insufficient to cause the blade to touch the magnet. A single roller, magnetized so that it attracts the blade to its surface, may be used. The Provisional Specification describes also a roller having a face of convex form and pairs of pulleys of magnetic material magnetized by a permanent magnet or an electromagnet so that the pair act respectively as north and south poles or the ends of each roller act as north and south poles.
Patent GB-842504-A (GB)
Title: Improvements in or relating to filters
Inventor: FLOYD FREDERICK
IPC: B01D46/00
Filed: 1958-02-18
Abstract: 842,504. Gas filters. OZONAIR ENGINEERING CO. Ltd. Feb. 18, 1959 [Feb. 18, 1958], No. 5317/58. Class 8(2). A filtering apparatus comprises a first oilwetted filter 11, preferably of knitted steel mesh, through which air or gas is drawn by a fan 12 and a second filter 15 comprising knitted or woven wire mesh and correspondingly arranged absorbing member of a fibrous material, such as yarn or thread, whereby any oil drawn from the first filter is absorbed by the fibrous material. The second filter is conveniently formed by feeding the wire and cotton to a single knitting or weaving machine, and is preferably identical in structure to the first element.
Patent GB-1146770-A (GB)
Title: S-triazolo[4,3-a]pyrazine derivatives
Inventor: MAGUIRE JOHN ANTHONY
IPC: C07D487/04
Filed: 1967-02-03
Abstract: 1,146,770. Triazolo-pyrazine derivatives. IMPERIAL CHEMICAL INDUSTRIES Ltd. 7 Dec., 1967 [3 Feb., 1967], No. 5356/67. Heading C2C. [Also in Division A5] The invention comprises compounds of formula wherein R<SP>1</SP> and R<SP>2</SP> are alkyl and X is OH, NH 2 , NHCHO or NHAc. The amines (X=NH 2 ) are made by reacting a 2,6-dialkyl-3-hydrazinopyrazine (I) with a cyanogen halide, preferably at pH 4-9 in presence of an acid binding agent; where the latter is an acetate (e.g. NaOAc) the acetamide (X=NHAc) is also formed. The compounds where X=NHCHO or NHAc are otherwise prepared by reacting the amines with an acylating agent derived from AcOH or HCO 2 H. The compounds where X=OH are made by reacting (I) with a reactive ester or halogen compound derived from carbonic acid, and if necessary, treating the initial product with a base. 2 - Ethoxycarbonylhydrazino - 5 - methyl- 3-n-propylpyrazine is prepared from the corresponding hydrazinopyrazine with ClCO 2 Et.
Patent GB-289205-A (GB)
Title: Improvements in or relating to spectacles
IPC: G02C5/00
Filed: 1927-02-25
Abstract: 289,205. Kirk, P., and Kirk, S. M., (trading as Kirk Bros.). Feb. 25, 1927. Spectacles.-Spectacle sides of tortoise-shell or the like or of metal covered with such materials are provided with spaces at the parts which engage the ears of the wearer consisting of intermediate adaptable portions of metal or of the metal core. In one example, the sides b have an intermediate metal portion a between the side proper and the end portion b<1> so that where the side passes over the ear adjustment may be made to suit the individual wearer. In some cases the metal portions may be covered with a flexible sheathing or tortoiseshell beads to enable the wire to he bent as desired. The wire a may also extend throughout the side b.
Patent GB-209622-A (GB)
Title: Improvements in mudguards for automobiles and other vehicles
IPC: B62D25/16
Filed: 1923-02-23
Abstract: 209,622. Coram, W. G. Feb. 23, 1923. Mud-guards for automobiles, velocipedes, and like vehicles are provided with vanes a formed integral with or attached to the guards b and extending along the whole or part of their inner faces. The edges of the vanes may be turned inwards and may converge towards one another at one end of the guard.
Patent GB-1424783-A (GB)
Title: Procuction process of fine grained ferrites
IPC: B01D47/00
Filed: 1973-02-02
Abstract: 1424783 Fine grained ferrimagnetic material LIGNES TELEGRAPHIQUES ET TELEPHONIQUES 2 Feb 1973 [15 Feb 1972] 5413/73 Heading C1J Fine-grained stoichiometric ferrimagnetic materials are prepared by preparing a suspension of salts in proportions corresponding to the ferrimagnetic material in an alcoholic medium, coprecipitating the salts as hydroxides by the addition of a base in alcoholic solution whilst continuous agitation is applied, washing the precipitate, filtering and drying the precipitate, baking the precipitate at 700‹ C. for 2 hours to obtain the oxides, isostatically pressing the precipitate into a pellet of the desired shape under about 5 metric tons/cm.<SP>2</SP> at room temperature, introducing the pellet into a vacuum oven and outgassing it down to 10<SP>-5</SP> mm. Hg, and, in order to cause the oxides to react and form the ferrimagnetic material, heating the outgassed pellet in the vacuum up to a sintering temperature which is then maintained for not more than 3 hours and then cooling in the vacuum, the duration of the vacuum heat treatment including heat-up and cooling times being under twelve hours. The ferrimagnetic material may be Zn, Ni ferrite and the base soda or the material garnet (e.g. iron yttrium gadolinium aluminium garnet) and the base ammonia. The salts may be chlorides or nitrates.
Patent GB-355760-A (GB)
Title: Improvements in or relating to blades for turbo-machines
IPC: F03B3/12
Filed: 1930-02-19
Abstract: 355,760. Hydraulic turbines ; pumps. SOC. RATEAU, 40, Rue du ColisÚe, Paris. Feb. 19, 1930, No. 5615. Convention date, Feb. 19, 1929. Void [Published under Sect. 91 of the Acts]. Drawings to Specification. [Classes 110 (i) and 110 (iii).] Blades.-In an axial type rotor of a turbine or pump the angle of exit (or entry in the case of a pump) is such at each point that the product of its tangent and the distance from said point to the axis increases from the periphery to the hub where the angle may be equal to or exceed 90‹.