baber/WOPTO huggingface dataset:
Patent GB-1109116-A (GB)
Title: Snap acting multi-contact electric switches
IPC: H01H19/62
Filed: 1963-10-16
Abstract: 1,109,116. Snap-action switches. R. F. OXLEY. 16 Oct., 1964 [16 Oct., 1963; 28 Feb., 1964; 2 April, 1964], Nos. 40924/63; 8490/64 and 13691/64. Heading H1N. A multi-contact switch has a cam and cam follower causing over-centre snap-action operation of the movable contact in a direction at right-angles to the direction of movement of the movable contact between fixed contacts in a row. In a rotary switch the stator 1 has an undulating cam profile 25 engaged by a roller 27 on a C-shaped plate 16, and the rotor 4 carries notched pillars 14, 15, engaged by rigid plates 16, 17, connected by tension springs 18, 19, upward movement of roller 27 causing plates 16, 17 to snap upwards and move a kidneyshaped contact 35 on plate 17 out of engagement with fixed contacts 21, 22, on the stator, and vice versa. A linear embodiment is described (Figs. 6-8, not shown). An additional moving contact (84) on the rotor 4 slidably engages a contact ring (80) as well as the fixed contacts (82) to give a make-before-break characteristic to the main snap-acting movable contact (35), (Figs. 4, 5, not shown). Several switches may be mounted on the rotor shaft 11 on top of each other. Contacts 21, 22 are formed by printed circuit techniques or by stamping. Different cam profiles make the switch stable in " on " or " off " positions, or in " on " positions only. The switch may provide fixed contacts engaged in the upper position of the movable contact as well as the lower position, or have a plurality of movable contacts.
Patent GB-1279146-A (GB)
Title: Plasma generating apparatus
IPC: H05H1/30
Filed: 1969-08-19
Abstract: 1279146 Discharge tubes; discharge lamps INTERNATIONAL PLASMA CORP 19 Aug 1969 [19 Aug 1968] 41239/69 Heading H1D A plasma generating apparatus in which gas is ionized by a radio-frequency field within a chamber for reaction with material placed therein for processing or analysis comprises one or more chambers 12 which are readily insertable between electrodes 22 into an operable position in which gas supply and exhaust conduits 18 and 20 are readily connectible to ancillary apparatus. The chambers 12 have removable covers 16 to enable boats carrying material to be inserted and are mounted in pairs between pairs of electrodes 22 each comprising a conductive plate 24 with a layer 26 of dielectric, e.g. plastics, material. The outer electrodes 22 are secured by bolts 76 to posts 50, and the inner electrodes are secured by bolts 72 to leaf springs 66 carried by a block 60 adjustably positioned by nuts 64 on a threaded rod 58 supported between insulators 56. The gas supply and exhaust conduits 18 and 20 are located half way along each chamber and are connected to supply and exhaust manifolds 82 and 86. The former is preferably made of glass and the latter communicates through an opening 88 with a pump for reducing the pressure in the chambers to a value of one or two mm. Hg.
Patent GB-1108987-A (GB)
Title: Semiconductive chopper circuit with improved error signal compensation
IPC: H03K7/02
Filed: 1965-09-28
Abstract: 1,108,987. Transistor pulse modulation circuits; chopper-type amplifiers. ROBERTSHAW CONTROLS CO. 28 Sept., 1965 [30 Sept., 1964], No. 41242/65. Headings H3T and H4L. A chopper circuit comprises a double emitter transistor connected by its emitters across a signal path and a potentiometer supplies a D.C. voltage to balance out offset voltage. Pulses applied to base 14 and collector 16 render the transistor periodically conducting between its two emitters so as to chop the signal applied at 32, 34 to a differential amplifier 26. A potentiometer 50 is adjusted to balance out the offset voltage and a diode-connected transistor 66 limits the switching pulse magnitude. Stability and accuracy are improved by maintaining the chopper at a constant temperature, by using low and equal resistors for 40 and 46 to minimize voltages changes across capacitor 44 due to transistor leakage current, by using transistors with matched input capacitance and by using matched resistors 40 and 46 and capacitors 42 and 44 so that switching spikes are balanced out. Capacitor 64 by-passes the switching pulse leakage currents.
Patent GB-1025055-A (GB)
Title: Derivatives of 1,2,4-thiadiazole
Inventor: SCHROEDER HANSJUERGEN ALFRED
IPC: C07D285/08
Filed: 1962-11-02
Abstract: The invention comprises compounds of the general formula <FORM:1025055/C2/1> in which X represents a halo, -NH2, -NHR, -NR2, -OR or -SR group, wherein R is an alkyl group of 1-4 carbon atoms. The compounds are prepared by reacting trichloroacetamidine with a trihalomethane-sulphenyl chloride, and, when X in the product is to be other than halo, treating the resulting 3-trichloromethyl - 5 - halo - 1,2,4 - thiadiazole with an appropriate alkali metal alcoholate, alkali metal mercaptide, ammonia, or primary or secondary amine.  Examples are given.  Reference has been directed by the Comptroller to Specification 916,285.ALSO:Fungicidal, herbicidal and pesticidal compositions comprise a compound of the general formula <FORM:1025055/A5-A6/1> in which X is halogen, -NH2, -NHR, -NR2, -OR or -SR group and R is a C1-4 alkyl group, and a carrier or diluent. Reference has been directed by the Comptroller to Specification 916,285.
Patent GB-1183567-A (GB)
Title: Shaft Seals
Inventor: OTTO DENNIS LEE
IPC: F16J15/34
Filed: 1968-08-30
Abstract: 1,183,567. Oil seals. TIMKEN ROLLER BEARING CO. 30 Aug., 1968, No. 41664/68. Heading F2B. A lip-type oil seal forming a primary contact area 44 in which exists a continuous lubricant film has patterned depressions which extend obliquely from the contact area and are defined by edge walls 37 presented at acute angles with respect to the direction of relative movement at the contact area so as to function as impellers for returning leakage emitted from the lubricant film. The seal may be gripped to the shaft by ribs 24 and a pair of lips having P.T.F.E. tips 34, 35 urged apart by a spring 33 into sliding contact with walls 22, 29. The depressions at the ends 36 of the lips may be triangular to function for both directions of rotation or formed with parallel grooves for one direction only, the depressions being arranged to form lobe areas 39 between the depressions and helical trailing edge walls 37. In operation, leakage enters the space between the lobes and the walls to form an unstable fluid film which is subjected to shear and rupture causing a portion to adhere to the lobes, a portion to adhere to the walls and freed lubricant particles to enter the depressions for engagement by the trailing edge walls 37.
Patent GB-1131321-A (GB)
Title: Table tennis balls
Inventor: JONES-HINTON JAMES
IPC: B29C51/08
Filed: 1964-10-14
Abstract: 1,131,321. Table tennis balls. DUNLOP CO. Ltd. 6 Oct., 1965 [14 Oct., 1964: 15 May, 1965], Nos. 41826/64 and 20632/65. Heading A6D. [Also in Division C3] Table tennis balls are made from rigid thermoplastic material having a burning rate (ASTM D-635-63) of not more than 5 inches per minute, a power factor at 10<SP>6</SP> cycles (ASTM D-150-59T) of not more than 0.05, an Izod impact strength on a ¢ inch by ¢ inch notched bar (ASTM D-256-56) of at least 2.5 ft. lb./in. of notch and a water absorption less than 0.9% in 24 hour for a thickness of 0.125 inch (ASTM D-570). Specified are PVC, acrylonitrile - butadiene - styrene copolymers, polypropylene, highly crystalline ethylene-propylene copolymers, high density polyethylene, polycarbonates, polyamides and high molecular weight diphenylol propane-epichlorohydrin copolymers having no free iponide groups. The manufacture of table tennis balls is as described in Specification 1,131,323.
Patent GB-1160816-A (GB)
Title: Novel Compositions Containing Polyols and Fillers and Polyurethanes Prepared Therefrom
IPC: C08K3/00
Filed: 1967-09-14
Abstract: 1,160,816. Polyol compositions; polyurethanes. ALLIED CHEMICAL CORP. 14 Sept. 1967 [15 Sept., 1966], No. 41940/67. Heading C3R. A polyol composition which may be reacted with a polyisocyanate to form a polyurethane comprises (a) an organic polyol, (b) an inert filler dispersed in (a), (c) a catalyst for the polyurethane forming reaction which is a divalent lead salt of a carboxylic acid in which the carboxyl group is attached to a tertiary carbon atom dissolved in (a) and (d) as catalyst stabilizer, an oxide, hydroxide or basic salt of a metal of Group II A  of the Periodic Table. The polyol (a) may be ethylene glycol or glycerol, a polyester or more preferably a polyalkylene ether. Typical fillers are attapulgite, kaolin, talc, bentonite, halloysite, aluminium silicate, calcium silicate, magnesium trisilicate, zinc sulphide, barium sulphate, calcium fluoride, titanium dioxide and amorphous silica. The filler is suitably used in amounts of 25 to 150% by weight based on the weight of polyol (a). Numerous lead catalysts (c) are listed, plumbous 2,2-dimethyl octanoate being specifically exemplified. The catalyst stabilizer (d) is more suitably an oxide or hydroxide of magnesium or calcium. Catalyst (c) is preferably used in amounts of 0À01 to 2% by weight based on the weight of polyol (a) and catalyst stabilizer (d) is preferably used in amounts of 0À05 to 5% by weight on the same basis. The composition may also contain other catalysts, in particular organo-mercuric salts. Aliphatic, cycloaliphatic and aromatic polyisocyanates may be reacted with the polyol composition. Preferred polyisocyanates are the polyurethane prepolymers.
Patent GB-1011971-A (GB)
Title: Water-insoluble monoazo-dyestuffs and process for their manufacture
IPC: C09B29/00
Filed: 1961-11-23
Abstract: The invention comprises water-insoluble monoazo dyes of formula <FORM:1011971/C4-C5/1> wherein R is a C1-C3 alkyl group and A is the radical of a coupling component linked in ortho position to an hydroxyl group and which is free from sulphonic and carboxylic acid groups. The dyes are prepared by the usual coupling process using 2-alkoxycarbonyl-5-carbamyl-anilines as diazo components.  The dyes are used to colour lacquers, natural and synthetic resins, rubber, cellulose derivatives and paper in yellow to red shades. Specifications 924,518 is referred to.
Patent GB-1158255-A (GB)
Title: High Speed Semiconductor Switch.
IPC: H01L29/00
Filed: 1966-09-22
Abstract: 1,158,255. Semi-conductor devices. WESTINGHOUSE ELECTRIC CORP. 22 Sept., 1966 [23 Oct., 1965], No. 42322/66. Heading H1K. The switching-on speed of an S.C.R. is increased by arranging the gate contact adjacent to a part of the cathode region not contacted by the cathode electrode so that a lateral voltage drop is produced across the uncontacted part of the cathode region on firing. As shown, Fig. 2, the device may be produced by diffusing gallium or aluminium into an N-type silicon wafer to produce a P-type surface layer, alloying an annular antimonycontaining gold foil to one face to produce the cathode region 11 and alloying boron-containing gold foils to the same and the opposite faces to produce P<SP>+</SP> type gate and anode contact regions respectively. Molybdenum electrodes 31, 32 are hard soldered to the cathode and anode regions using silver preforms, a lead is connected to gate contact 33, and the edge of the wafer is removed by sand-blasting or etching. The part of the resolidified cathode alloying foil which is not covered by the cathode electrode may either be left in position or removed. The cathode region may also be produced by diffusion, in which case a thin metal layer may be applied to the exposed part by ultrasonic soldering. A portion of the cathode junction may be short circuited, and the edge of the body may be suitably shaped to increase the breakdown voltage. The positions of the cathode and gate contacts may be reversed so that the gate surrounds the cathode region. The electrodes may also be of tungsten or tantallum and may be held in place by pressure. The anode electrode 32 may contact a copper member which may be provided with a mounting stud, and a flexible copper lead may be bonded to the cathode electrode 31.
Patent GB-1158231-A (GB)
Title: Improvements in and relating to the Manufacture of Filaments of Regenerated Cellulose.
Inventor: GARDNER BRIAN CONRAD
IPC: D01F2/10
Filed: 1965-10-06
Abstract: 1,158,231. Flame-proof viscose filaments. COURTAULDS Ltd. 5 Oct., 1966 [6 Oct., 1965], No. 42376/65. Heading B5B. Flame-proof viscose rayon filaments are made by spinning viscose containing at least 20% by weight, based on the cellulose content of the viscose, of a flame-proofing agent, viz., tris- (2,3-dibromopropyl) phosphate. Preferably the agent is injected, either neat or as a solution or dispersion, into the viscose immediately before extrusion. Surfactants should preferably be absent or present to only a limited extent. The viscose may contain 7À9% cellulose and 5À8% NaOH, and may be held under vacuum and then spun into a bath containing 8À5% H 2 SO 4 , 1% ZnSO 4 , and 16% Na 2 SO 1  at 45‹ C.
Patent GB-1376026-A (GB)
Title: Apparatus for locally induction hardening work-pieces
IPC: C21D9/00
Filed: 1972-03-21
Abstract: 1376026 Discharging articles from sheets RESEARCH ENG & MFG Inc 21 March 1972 [25 March 1971] 42459/73 Divided out of 1376025 Heading B8S [Also in Divisions C7 and H5] Articles such as self-tapping screws 2 to be locally hardened by heat treatment are fed conventionally from a hopper 24 down a raceway 26 suspended by their heads and are then advanced through inductor assembly 59 by reciprocating feeder 112; heated screws are withdrawn by roller 140 and pass down a track between watercooling manifolds before being released by reciprocating gate 178. The feeder assembly, Fig. 4, comprises a pusher plate 112 slidably mounted on guide pins 120 and driven by motor 100 through crank 102 and linkage 104 so that each stroke advances one screw. The vertical arm 126 of the pusher assembly is secured rigidly to a member 128 slidably'mounted within the horizontal part of the assembly and biased by spring 132 to accomodate the stroke in the event of jamming. The escapement mechanism 178 comprises arcuate plates 189 pivotally mounted at 182 for reciprocation by ram 186 and having projections 190, 192 which provide a gate 194.
Patent GB-1240628-A (GB)
Title: Load bearing floor
Inventor: BOHLIN JAN-OLAF
IPC: E04B5/04
Filed: 1969-08-26
Abstract: 1,240,628. Reinforced concrete slabs. J.- O. BOHLIN and S. E. B. THELBERG. 26 Aug., 1969, No. 42469/69. Heading E1W. A reinforced concrete slab 2 has thickened portions in the region where it bears on supporting walls 7 and has on its upper surface T-section reinforced concrete beams 1 extending between the supporting walls 7 but being shorter than the distance between said walls and terminating short of each end of the slab. The beams 1 are precast separately from the slab of a relatively ; higher strength concrete and bonded into the slab by means of their extending reinforcements. Conduits 6 may be layed on the surface of the slab which may form a support for flooring. To improve the sound insulation properties of the slab, sand may be used to cover the top surface and a layer of smooth concrete placed over it.
Patent GB-1471711-A (GB)
Title: Ball nut assembly
IPC: F16H25/24
Filed: 1974-10-01
Abstract: 1471711 Screw and nut gearing WARNER ELECTRIC BRAKE & CLUTCH CO 1 Oct 1974 [15 Nov 1973] 42494/74 Heading F2Q In a ball screw and nut mechanism, two nuts 13a, 13b, engaged on a single screw 11, are bridged by a connector ring 20 having two sets of circumferentially-spaced recesses 24a, 24b, differing in number, e.g. having twelve equally spaced recesses 24a and thirteen equally spaced recesses 24b, Fig. 4, and each nut is provided with a threaded aperture, 25a, 25b, which carries a set screw 26a, 26b, with a reduced tip portion for engaging one of the recesses 24a, 24b, respectively. The nuts are caused to abut together, and in order to adjust the backlash or elastic preloading of the balls, the orientation of one nut relatively to the other nut may be varied in small angular increments, by withdrawing the set screws, rotating the connector ring 20 until corresponding recesses 24a, 24b become aligned with the apertures 25a, 25b respectively, and reinserting the set screws 26a, 26b. Each nut may be provided with additional apertures and set screws, at circumferential spacings to correspond with the appropriate angular spacings between recesses in the connector ring 20. Rings 36a, 36b, of felt or like material may be fitted into counterbores 35a, 35b in the nuts, serving to exclude dust from the ball track. The connector ring 20 may be housed in similar counterbores in the nuts, as in Fig. 1. In an alternative embodiment (not shown) the connector ring may be located outside the nuts, with the threaded apertures provided in the connector ring, and with the two sets of circumferentially-spaced recesses provided in the ends of the two nuts respectively. Each nut is provided with a return channel (not shown) for recirculation of the balls.
Patent GB-1179217-A (GB)
Title: Machine Tool Damping Unit.
IPC: B23Q11/00
Filed: 1968-09-06
Abstract: 1,179,217. Machine tool damping. CINCINNATI MILLING MACHINE CO. 6 Sept., 1968 [12 Oct., 1967], No. 42648/68. Heading B3B. A damping unit for controlling vibrations, e.g. in the overarm 9 of a milling machine, comprises at least one viscoelastic absorber element, e.g. 27 or 28 of varying cross-section interposed between a damper mass 23 and a support location 25, 26 on an adjustably positioned support means, relative movement between the support means and absorber element altering the working height h of the absorber element (Fig. 2) to alter its stiffness and thereby the frequency of the damping unit. The support means may, as shown, comprise a shaft 24 with shoulder portions 25, 26 and adjustment of the positions of the shoulders relative to the absorber elements may be by means of a screw 32 or alternatively, cam means (Fig. 19a, not shown), responsive to movements of the overarm, automatically vary the support locations to vary the frequency of the damping unit according to a predetermined relationship. Alternatively (Fig. 20, not shown) electrical sensing means responsive to the natural vibration of the machine may be used to control the damping units accordingly. The absorber elements may be straight and of generally triangular section (Figs. 14-18, not shown), or annular, or segmental surrounding the damper mass (Figs. 12, 13, not shown). The damper masses may be supported by springs so as substantially to relieve the absorber elements of static loading.
Patent GB-1274940-A (GB)
Title: Isolation of proteins
Inventor: KALINA VLADIMIR
IPC: C12R1/06
Filed: 1969-08-28
Abstract: 1,274,940. Treating biomass to recover protein. SOC D'ASSISTANCE TECHNIQUE POUR PRODUITS NESTLE S.A. Aug.28, 1969, No.42795/69. Heading C6F. Bacterial biomass, concentrated by evaporation or centrifugation to a cell dry matter content of 7-15%, is subjected to an alkaline shock of short duration (up to 10 minutes) at an alkali concentration of 0À1N to 2N, to release the cytoplasmic content of the cells, an acid is then added to obtain a free acid concentration of 0À1N to 2N, the acid conditions are maintained for sufficient time to obtain degradation and solubilization of undesirable cell constituents, such as purine bases and growth-retarding factors, and the liberated cell protein is recovered by isoelectric precipitation and dried to a powder. Sodium and potassium hydroxides, and sulphuric, hydrochloric and phosphoric acids are the preferred alkalis and acids, respectively. The treatment with acid is preferably effected at an elevated temperature, between 50 and 100 C. Acids having reducing and/or chelating properties, of which tartaric, citric, ascorbic and acetic acids are mentioned, may be added during or after the treatment with strong acid, to prevent any discolouration of the protein product. Examples are directed to the recovery of protein from biomass from the cultivation of Micrococcus cerificans on C 12 -C 18  paraffins and Alcaligenes sp. on ethanol, respectively. The product is typically a white powder having a neutral taste.
Patent GB-1430369-A (GB)
Title: Aircraft instrumentation displays
IPC: G01P3/62
Filed: 1972-09-22
Abstract: 1430369 Aircraft instruments DEFENCE SECRETARY OF STATE FOR 19 Sept 1973 [22 Sept 1972] 43895/72 Heading B7W An aircraft instrumentation display system having a source of pitot pressure and a source of static pressure includes means for combining said pressures to provide a signal, representative of aircraft total energy for use as an engine power demand director, and means for converting the pitot pressure into a signal for use as an elevator demand director. Pitot pressure P, derived from a forward-facing probe, is conducted by tube 6 and static pressure B, sensed at a base surface at the rear end of the fuselage, is conducted by tube 10 and in an engine power demand director, Fig. 2, pitot pressure P passes to a capsule 23 contained in a chamber 24 connected to static pressure B. Further baseconnected capsules 30 and 32, housed within a sealed chamber 31 maintained at a fixed datum level, are connected respectively to pitot pressure P and static pressure B, the capsules being connected by rod 33 to an arm 34 mounted at one end on a fixed pivot 35. The other end of arm 34 is connected by a link 28 to an arm 26, one end of which is connected by rod 25 to capsule 23, the other end actuating the pointer 22 of a meter 20 having a settable total energy level indicator 37, the movement of arm 26 being controlled by the pressure-responsive mechanism according to the value where K is substantially constant up to high subsonic speeds. An elevator demand director for use in level flight, Fig. 3, comprises a capsule 40 supplied with pitot pressure and housed in a chamber 41 maintained at a fixed datum pressure, the capsule operating through a linkage 42 the pointer 44 of an elevator demand indicator. An elevator demand director for climbing or descending flight (Fig. 4, not shown) comprises a sealed chamber divided by a perforated diaphragm, one side of which is pressurized by pitot pressure and the other side connected to the pointer of an elevator demand director. An embodiment is described (Fig. 5, not shown) in which pressure signals from an engine power demand director and an elevator demand director are converted into electrical signals which can be fed to a cathode-ray tube display unit.
Patent GB-952886-A (GB)
Title: Feeler apparatus
IPC: D06H3/10
Filed: 1960-12-21
Abstract: 952,886. Linear dimension gauges. SDRUZENI PODNIKU TEXTILNIKO STROJIRENSTVI. Dec.21, 1960 [Dec.21, 1959], No. 44007/60. Heading G1M. [Also in Division D1] Variation in the thickness of a travelling web of fabric is signalled to indicating or regulating means by up and down movement of floating centreless feeler rollers 2 resting on the web 3 and constrained against movement in, or opposite to, the direction of travel of the web, by rollers 4, mounted on a common spindle 10, and a fixed member 6 respectively. Vertical movement of the rollers 2 is imparted to small rollers 7 carried in forks 8 and a rocking lever system 9 imparts the averaged movement to a regulating system (not shown).