baber/WOPTO huggingface dataset:
Patent GB-610511-A (GB)
Title: A thermionic saw-tooth wave generator
IPC: H03K4/34
Filed: 1945-01-16
Abstract: 610,511. Saw-tooth generating circuits. TRIGGS, W. W. (Farnsworth Television & Radio Corporation). Jan. 16, 1945, No. 1313. [Class 40 (vi)] In a blocking oscillator the frequency of oscillation is varied without affecting the amplitude by conjointly varying the internal resistance of the valve (e.g. by means of a variable resistor in the cathode circuit) and the amount of feed-back. Fig. 5 shows valve 10 arranged in a blocking oscillator circuit. A constant rate of change of anode current in inductance 19 produces constant anode and grid voltages 40, 41, as shown in Fig. 2. Initially, the screen grid receives most of the current and thereafter suffers a corresponding decrease as the anode current builds up so that the screen grid voltage starts at a low value and rises substantially linearly as at 39 in Fig. 2. The cathode voltage includes an initial step corresponding to the flow of screen grid current through cathode resistors 16, 46, 52, and then has a linear rise 38 corresponding to the flow of anode current. When regeneration occurs, the cathode returns rapidly to zero potential 45, the screen returns to battery voltage 44 and the grid experiences a large negative swing 43. The grid and cathode voltages are combined to remove the stepped portion of the cathode wave-form and give a true saw-tooth output 46. The frequency is changed from one value to another by means of switch 53 which removes the short across resistor 52 in the cathode circuit and decreases the amount of winding 54 in the grid circuit. A network 28, 29 is inserted to reduce non-linearity in the current wave-form which output 46 produces in the inductive load 27 and the network elements may be variable to give a control of amplitude in the output. Large positive pulses appearing at the anode may be rectified by diode 33 and applied as a high voltage supply for a cathoderay tube. If required, negative synchronizing pulses may be applied to terminal 30. In Fig. 6 (not shown), the linearising network 28, 29 is eliminated and an auxiliary winding on coil 22 is coupled to a. resistance capacity network in the grid circuit of the valve.
Patent GB-509419-A (GB)
Title: Cheek and mouth corner protector for dental use
IPC: A61C5/90
Filed: 1938-01-14
Abstract: 509,419. Dental cheek protectors. VIG, E., and GERSTL, A. Jan. 14, 1938, No. 1323. Convention date, Aug. 24, 1937. [Class 81 (ii)] A cheek and mouth corner protector for use in dentistry comprises a protector plate a, having a reflecting surface and adapted to rest against the inside of the cheek, and a plate c connected to the plate a, by a bridge piece b and having a hook d for the attachment of a band e to be placed round the ear. A lamp may be arranged in the plate a for illuminating the mouth.
Patent GB-1035521-A (GB)
Title: Improvements in or relating to variable electric resistances, variable transformers and the like
IPC: H01C1/12
Filed: 1963-01-11
Abstract: 1,035,521. Variable resistors; transformers. MINIATURE ELECTRONIC COMPONENTS Ltd., and O. T. LEWIS. Jan. 11, 1963, No. 1348/63. Headings HIS and H1T. [Also in Division H2] In a variable electric component such as a resistor or transformer having an element along which a contact slide to vary the component value, a spring contact is supported and balanced by forces acting at four spaced-apart regions, two of these forces acting between the element and the sliding surface of the contact and between a take-off conducting member and an abutting surface of the contact respectively. In a rotary potentiometer, Fig. 1, an arrow-shaped spring contact 5 has a contact surface 6 which bears on a circular resistance track 4, a central surface 7 which bears on the underside of a slot 10 formed in the stem 11 of a mushroom-shaped conducting stud 12, and two upturned triangular lugs 8, 9 which are located in arcuate recesses 15, 16 in the underside of the mushroom head 13 and are pressed down upon by head 13, so providing the third and fourth balancing forces. When stud 12 is turned to vary the resistance, lugs 8 and 9 co-operate with recesses 15, 16 to turn the contact 5, whereupon the surface 6 travels round track 4. Variations in the shape of contact 5 and in the positions of application of the balancing forces are described (Figs. 2 to 5, not shown). In a linear potentiometer, Fig. 6 (not shown), a contact 5 has one spring finger with a contact tip 6 bearing on a linear resistance track 4, a second spring finger with a contact surface 7 which co-operates with the thread of a lead screw 23, and two flat surfaces 8, 9 which bear down upon insulating surfaces 21, 22. When the screw 23 is turned, the surface 7 moves along the screw thread and so contact surface 6 travels along track 4.
Patent GB-919708-A (GB)
Title: Improvements relating to the cleaning and emptying of pit tubs and mine cars
IPC: B60S3/00
Filed: 1960-01-14
Abstract: 919,708. Tipping pit tubs. BUTTERLEY CO. Ltd., and WESTMORELAND, A.G. April 12, 1961 [Jan. 14, 1960], No. 1357/60. Addition to 801,259. Class 78 (4). Empty pit tubs are cleaned by being placed in a cage d (Fig. 1) or 3 (Fig. 10), (not shown), which is then inverted to rest on a vibratory platform. In the arrangement of Fig. 1 the cage d is supported by a lifting yoke j through trunnions i which permit it to be inverted manually so that it can be lowered on to a vibrating platform. Catches n normally hold the cage against movement about the trunnions i. In the alternative construction of Fig. 10 the cage 3 is supported from the vibrating platform 12 through rollers 5, 6 engaging end rings 4 so that the cage can be inverted by driving the rollers 5. The vibratory mechanism for the platform in either embodiment may be constructed as described in the parent Specification.
Patent GB-126092-A (GB)
Title: Improvements in and relating to the Separation of Oil from the Refrigerant in Refrigerating Machines.
Inventor: MCCLELLAN BENJAMIN SEWARD
IPC: F25B31/00
Filed: 1918-01-24
Abstract: 126.092. McClellan, B. S. Jan. 24. 1918. Pressure - regulating valves.-An expansion valve for refrigerating machines, controlled automatically by the pressure in the evaporator, comprises a sliding member 35 having minute radial ports 42, 43 and a central passage 41. Liquified refrigerant enters by a pipe 28 and passage 18, and expands after its passage through the valve, into a chamber 37, the gas passing to the evaporators through connexions 55. A spring 47 assisted by the pressure of the gas tends to hold the valve member raised, with the lower ports covered, but when the gas pressure falls a spring 48 acting through a cap 46 and a diaphragm 44 depresses the valve member and admits the liquefied refrigerant. The diaphragm comprises an upper flexible disk 44<a> and a lower metal disk 44<b>, clamped at the edge against a rubber &c. packing ring 44<c>. The pressure of the spring 48 is regulated by means of a screw 50. Oil carried with the refrigerant separates in the chamber 37, and is returned through a pipe 63 to the machine.
Patent GB-1019192-A (GB)
Title: Process of manufacturing unburned magnesia-base bricks
IPC: C04B35/03
Filed: 1963-01-11
Abstract: Unburnt, non-hydrated magnesia-base bricks having a magnesia content of at least 40% are prepared by mixing a sintered magnesia fraction having a grain size below 60 m  with a second magnesia or magnesia-containing fraction having a grain size of at least 200 m , moulding the mixture into bricks and drying in a non-hydrating atmosphere.  The second fraction may consist of magnesia in admixture with chromite, silica, alumina or alumina yielding materials.
Patent GB-999668-A (GB)
Title: Rotary heat exchangers
IPC: F28D19/04
Filed: 1962-01-15
Abstract: 999,668. Rotary heat exchangers. I. LAING. Jan. 15, 1962 [April 1, 1961], No. 1487/62. Heading F4S. The subject-matter of this Specification is described in Specification 999,666, with reference to Figs. 6, 7, 11, 12 and 14 of that Specification, but the claims differ. The Specification also includes a further embodiment as shown, wherein adjacent fan blades 10 and 12 are connected by tubes 16. Specifications 886,376, 999,667 and 999,669 also are referred to.
Patent GB-918403-A (GB)
Title: Improvements in or relating to polyalcohols
IPC: C07C31/18
Filed: 1961-01-13
Abstract: In a process for the preparation of polyalcohols by the reaction of formaldehyde and an aliphatic carbonyl compound in an aqueous alkaline solution at a pH between 4 and 7, after removal of the unreacted formaldehyde an aliphatic primary N-dialkyl-substituted amide <FORM:0918403/IV (b)/1> in which R4 represents hydrogen or an alkyl radical and R2 and R3 alkyl radicals, is added to the reaction solution which is concentrated at between 50 and 130 DEG C. to eliminate water and precipitate mineral salts, and the polyalcohol is then recovered.  The preparation of trimethylol ethane, trimethylol propane, and pentaerythritol in which N-dimethyl formamide is used are exemplified and amides such as N-dimethyl acetamide, N-diethylacetamide, N-dimethyl formamide, and N-propylformamide are referred to.  The synthesis solution may be preconcentrated at not more than 120 DEG C. and from 0.1 to 10 times the partial volume of the polyalcohols, of amide may be added.
Patent GB-779229-A (GB)
Title: Improvements in or relating to the production of transition metals of the fourth group
IPC: C22B34/10
Filed: 1956-01-18
Abstract: 779,229. Extracting refractory metals. SOBERTI. Jan. 18, 1956 [Jan. 21, 1955], No. 1722/56. Class 82(1) Transition metals of the fourth group (e.g. titanium or zirconium) are prepared by reducing a tetrahalide of the metal by means of an alkali or alkaline-earth metal (e.g. sodium or magnesium), the temperature of the reaction chamber being maintained above the melting point of the alkali or alkaline-earth halide produced by the reaction but below the boiling temperature of the reducing metal and the excess heat is absorbed by the vaporization of an auxiliary fluid surrounding the reaction chamber. In the Figure, R is the reaction chamber with a cover G and fluid tight seal J, E the vessel containing the auxiliary liquid with insulations K and condenser C. The cover G is provided with two tubes A allowing the chamber to be evacuated then filled with an inert gas..The reagents are introduced through a tube T. A basket P may be placed in the reaction chamber R. Before reduction is started, a heater F is switched on to heat the auxiliary fluid to a sufficient temperature, heating ceasing when the reaction is started. The temperature of the auxiliary fluid (and so, of the reaction) can be controlled by a pump connected to the condenser C through the pipe V: e.g. under a pressure of 1/100 atmosphere zinc chloride boils at 497‹C.
Patent GB-1197430-A (GB)
Title: Mechanism for Converting a Constant Rotary Motion into an Intermittent Rotary Motion
IPC: F16H27/04
Filed: 1967-12-05
Abstract: 1,197,430. Toothed gearing; couplings. NATIONAL CASH REGISTER CO. 5 Dec., 1967 [17 April, 1967], No. 1798/70. Divided out of 1,195,859. Headings F2Q and F2U. Uniform rotary motion of an input shaft 520 is converted into intermittent rotary motion of an output shaft 530 by mechanism comprising a bevel gear 524 secured to shaft 520 and meshing a bevel gear 534 carried by a member 532 rotatably mounted on shaft 532, a bevel gear 546 meshing bevel gear 534 and adapted to be fixed relative to a frame 512 by latch means, and a link 540 having one end pivotally secured by a member 538 to the bevel wheel 534 and having the other end pivotally connected to a link 542 secured to the output shaft 530. The latch means comprises a member 550 pivotally mounted on a disc 548 secured to bevel gear 546, movement being prevented by the engagement of member 550 with a shoulder 558 on a control lever 560. When the lever 560 is raised, a shoulder 556 on member 550 engages a shoulder 562 on a member 564 secured to the shaft 520 thereby coupling bevel gear 546 to input shaft 520 and producing constant velocity rotary motion of output shaft 530.
Patent GB-328216-A (GB)
Title: Stylus mounting for sound reproducing machines
IPC: H04R11/08
Filed: 1929-01-19
Abstract: 328,216. Lissen, Ltd., and Richardson, R. P. Jan. 19, 1929. Gramophone pick-ups; magnetic instruments.- In an electrical pick-up comprising a permanent magnet 2 with sheet metal pole piece 3 and coil 4, the stylus holder 1 which forms the armature is damped by an inertia load 12 jacketed between a grooved rubber strip 11 on the stylus and rubber buffers 13 with adjustable screws 14. The stylus 1 is attached by a leaf spring 5 to a column 6 on a plate 8 pivoted at 10 to the magnet 2 to allow of its being swung away. The load 12 shares the stylus vibrations to an increasing extent as the amplitude increases but damps the motion more and more as the frequency increases. Specifications 308,698 and 308,747 are referred to.
Patent GB-1243088-A (GB)
Title: Catalyzed isomerization of polyesters of alpha-beta-unsaturated carboxylic acids
IPC: C08G63/58
Filed: 1969-01-13
Abstract: 1,243,088. Isomerisation of cis-configuration polyesters; copolymerisable compositions. GENERAL TIRE & RUBBER CO. 13 Jan., 1969 [19 Jan., 1968], No. 1954/69. Headings C3P and C3R. A polyester derived at least in part from an α,# - unsaturated, cis - configuration dicarboxylic acid is isomerized into the trans-configuration by (a) adding a compound of the formula where each of R 1  to R 4  is hydrogen or a C 1-5  alkyl group to the polyester, preferably in an amount of 0À01 to 5% by weight based on the polyester; and (b) heating the mixture at 15- 110 C. until at least a portion of the polyester has been isomerized. Isomerization may be effected in the presence of a solvent and styrene. In the examples, the polyesters were derived from (1) and (2) maleic anhydride, fumaric acid, phthalic anhydride and propylene oxide; (4) maleic anhydride and pentanediol; (6) maleic anhydride and propylene oxide. Copolymerizable compositions comprise the polyester, a vinyl monomer (e.g. styrene), an inhibitor, benzoyl peroxide and possibly glass fibres and clay.
Patent GB-1056001-A (GB)
Title: Method and apparatus for inhibiting formation of solid hydrocarbon hydrates
Inventor: HEWLETT ARTHUR JAMES
IPC: C10G5/00
Filed: 1965-01-15
Abstract: 1,056,001. Separation of liquids from hydrocarbon gas streams. REED ROLLER BIT CO. Jan. 15, 1965 No. 1999/65. Heading B1L. During the low temperature separation of liquids from a flowing hydrocarbon gas stream, the formation of solid hydrocarbon hydrates is inhibited by supplying the gas under pressure through a restricted connection to a separating vessel, and passing the expanded gas through a body of deliquescent dehydrating material to form a brine, at least a portion of the brine being directed into the restricted connection for mixing with the incoming gas stream. Make-up liquid may be added to the deliquescent material to form additional brine to increase the overall brine concentration; the supply of make-up liquid may be controlled in response to the density of the brine collected at the bottom of the separating vessel, the temperature of the expanded gas stream at its entry into the vessel or its rate of flow into the vessel. or the make-up liquid may be supplied at fixed time intervals. In the embodiment of Fig. 1, gas stream in line 37 passes into water knock-out vessel 35 and is supplied by line 34 to choke 36. (Figs. 4. 5 not shown). From choke 36 the gas enters the lower liquid section 9 of the separating vessel and passes upwards to outlet 16 through trays 11, 12, 14. tray 14 carrying solid dehydrating agent. for example CaCL 2 , NaCL, LiCL, NaOH, KOH, (Fig. 2 not shown). Brine from the lower liquid layer 18 flows to choke 36 by line 58 and pump 63 (Fig. 3 not shown). In the embodiment of Fig. 2, the separating vessel has a warming device at its lower end.
Patent GB-246507-A (GB)
Title: Improvements in dyeing and printing animal and vegetable materials
IPC: D06P1/62
Filed: 1926-01-23
Abstract: 246,507. Chemische rabrik Milch Akt.-Ges., and Lindner, K. Jan. 23, 1925, [Convention date]. Ketones; sulphonic acids.-Palmitoylbenzene sulphonic acid and stearyltoluene sulphonic acid are prepared by condensation of the corresponding acid chloride and benzene or toluene in the presence of aluminium chloride, and then sulphonating the product, for example, with steam containing 7 per cent of sulphuric anhydride.
Patent GB-926544-A (GB)
Title: Electrical insulator for direct current transmission systems
IPC: H01B17/02
Filed: 1961-01-19
Abstract: 926,544. Insulators. ALLMANNA SVENSKA ELEKTRISKA A.B. Jan. 19, 1961 [Jan. 20, 1960], No. 2156/61. Class 36. An insulating element, for a chain insulator designed for D.C. transmission systems, which has a body 1 having a convex non-ridged upper surface and having concentric ribs 5 on its under surface, is characterized by the fact that the surface leakage distance between the metal cap 2 holding the element, and providing a socket 4 for coupling another similar element, and the pin 3, which supports a further element, is at least 3.5 times the " unit spacing "-the distance from the bottom of the pin 3 to the bottom of the socket 4.
Patent GB-264887-A (GB)
Title: Improvements relating to the steam distribution for compound engines of the woolf type
IPC: F01B17/04
Filed: 1927-01-25
Abstract: 264,887. Stumpf, J. Jan. 25, 1926, [Convention date]. Engines with parallel cylinders with axes perpendicular to main shaft. -An engine of the Woolf type has a single distributing-valve for both the high and low pressure cylinders. In the engine, Fig. 1, the inlet to and exhaust from the high pressure cylinder a and inlet to the low-pressure cylinder b are controlled by heads e on a common valve stem p. The low-pressure cylinder is of the uniflour type, the piston controlling central exhaust ports. Balance pistons are arranged at the ends of the valve. The high and lowpressure pistons are made the same length. One balance piston may be omitted, and the outer end of the other put to steam through a passage o in the valve-rod p, Fig. 2, or otherwise. Two units, each consisting of a high and low-pressure cylinder a, b and a valve-chest d in the angle between the cylinders cast in one, may constitute a single engine. The valves may be operated by a common shaft q. Either unit may be cut out. Specifications 264,888 and 264,889 are referred to. The Specification as open to inspection under Sect. 91 (3) (a) comprises also a contraflow engine. This subject-matter does not appear in the Specification as accepted.
Patent GB-122902-A (GB)
Title: An Improved Chemical Product for use as a Fertilizer.
Inventor: ENGLAND RICHARD
IPC: C05B7/00
Filed: 1918-02-06
Abstract: 122,902. England, R. Feb. 6, 1918. Manures.-A fertilizer consists of sulphate of ammonia and phosphate of ammonia and is prepared by saturating a mixture of sulphuric and phosphoric acids with ammonia. Dry ground degelatinized or calcined bones or precipitated phosphates may be added.
Patent GB-877337-A (GB)
Title: Improvements in and relating to slurries for use as breeding materials in nuclear reactors
Inventor: BROWN ALLAN
IPC: G21C3/52
Filed: 1959-01-20
Abstract: 877,337. Nuclear breeding materials. GENERAL ELECTRIC CO. Ltd. Dec. 23, 1959 [Jan. 20, 1959], No. 2168/59. Class 39(4). A slurry of thoria in a liquid metal, for use as a breeding material in a nuclear reactor, is produced by dissolving thorium metal in the liquid metal and reacting the dissolved thorium to form thoria in the matrix of the liquid metal. The preferred liquid metal is bismuth or a bismuth alloy. Conversion of the thorium metal to thoria may be effected by reaction with an oxide which is less stable than thoria, for example bismuth oxide. The slurry may be used directly as a breeding material or mixed with further liquid metal, which may contain a different concentration of thoria. In an example, excess bismuth oxide is added to a melt of bismuth alloy containing 5% thorium and the agitated mixture is heated under vacuum at about 500‹C. Specification 842,173 is referred to.
Patent GB-279289-A (GB)
Title: Improvements in connecting rods
IPC: F16H21/34
Filed: 1927-01-25
Abstract: 279,289. Dehn, F. B., (Healey-Aeromarine Bus Co., Inc.). Jan. 25, 1927. Connecting-rods. - A compound big-end assembly comprises crank-pin bearing bush formed in halves, which carry the joint pins of the auxiliary rods and are embraced by an integral ring portion on the master rod. The master rod may be formed in halves 10, 11, Fig. 1, bolted together and having ring portions 13, 14 engaging the bevelled edges of flanges 21, 22 on the bush 15, which may be of aluminium alloy. The auxiliary rods 17 are mounted on hollow pins 16, engaging holes in the flanges 21, 22, and secured by the bolts 24 which clamp the rings 13, 14 together. The bush 15 is formed with stiffening webs between the joint pins 16. The master rod 10<a>, Fig. 4, is formed in one piece, and partially split to permit contraction on to the flange 21<a> of the crank-pin bush by means of a bolt 24. The auxiliary rods 17<a> are forked and hinged on pins 16a mounted in the flange 21a.
Patent GB-268910-A (GB)
Title: Improvements in electrical switches
IPC: H01H21/42
Filed: 1926-01-26
Abstract: 268,910. Dobson, E., and Foster Engineering Co., Ltd. Jan. 26, 1926. Switches, quickaction.-In a switch of the type described in Specification 166,592, in which contact-making bars a are moved-vertically by a lever b turning on an axis c and connected to an operating -lever g through the medium of a spring or springs, the spring h is attached to a throwing- lever f, which operates the lever b. The lever g is pivoted at a point behind the axis c, while the level f is pivoted at points f<2> in front of the axis c. The spring h is attached to the lever g at a point behind the pivots f<2> and tc a pin f<1> carried by the lever f and engaging a slot in the lever b. A striker i on the lever g ensures actuation of the lever b should the spring be insufficient. Vertical movement of the bars a is ensured by a link or links parallel to the lever b. In a modification, an arm l, Fig. 5, attached to the throwing-lever f, carries tappets l<1>, l<2> which engage the contact-carrying lever b. A spring k connecting the levers f, b ensures a quick break. The striker i operates an extension m of one arm of the lever f.
Patent GB-174281-A (GB)
Title: Improvements relating to the steering gear of motor vehicles
IPC: B62D7/22
Filed: 1921-01-17
Abstract: 174,281. Ramage, T. Jan. 17, 1921. Steering-gear; deflectable axle-ends.-Tensioning-devices are provided between the axle and the stub-axles to prevent rattle due to looseness of the parts. As shown, springs 14 are attached at one end to an adjustable rod 19 carried by a bracket 15 clamped to the axle 5 and at the other to a clevis 12 attached to the pin 11 passing through the steering-arm 9 of the stub-axle 7.
Patent GB-487587-A (GB)
Title: Improvements in liquid-sealed joints between relatively rotating members
IPC: F16J15/40
Filed: 1938-01-24
Abstract: 487,587. Stuffing - box substitutes. SPARGO, R. J. Jan. 24, 1938, No. 2291. [Class 122 (v)] A liquid seal for relatively rotating members, e.g. the shaft of a pump for ore pulp, comprises a liquid chamber 9 closed by packing rings 11, 12 having lip portions offset towards the chamber and a further packing 10 on the side remote from the atmosphere having a lip portion offset away from the chamber. Grooves 24 in the ring 11 permit slight leakage of sealing liquid to lubricant and exclude grit from the packings. The pressure of ring 12 on the shaft may be adjusted by a gland 19. Deformation of the rings 10, 11 is prevented by a supporting ring 25. Specification 480,524 is referred to.