baber/WOPTO huggingface dataset:
Patent GB-1057232-A (GB)
Title: Improvements in and relating to production of mechanical and chemo-mechanical pulp from iigno-cellulose-containing material
IPC: D21D1/30
Filed: 1964-04-03
Abstract: In the production of pulp from ligno-cellulosic material such as wood chips the material is defibred in the presence of steam at temperatures above 100 DEG C. and corresponding pressures and is then blown successively by means only of the steam pressure to two or more refining stations the pulp being diluted with water before each refining station.  Chips of fir wood which have been moistened with steam and impregnated with an aqueous solution of sodium sulphite are fed by a hopper 10 and feeder 12 to a vessel 14 to which steam is admitted through a pipe 16, the pressure in the vessel 14 being 8 atmospheres gauge.  The chips are fed continuously to a disc-type defibrator 18 and thence the pulp at a consistency of 30% is blown via a valve 22 and conduit 24 to a disc-type refiner 26.  Water at a temperature of about 100 DEG C. is added to the pulp just prior to its entry to the refiner 26 the concentration and temperature of the pulp being reduced thereby to e.g. 20% and 135-140 DEG C. respectively.  The pressure in the refiner 26 is e.g. 3 atmospheres gauge.  The pulp then passes to a further refiner 40 accompanied by further dilution and reduction in pressure and temperature and is discharged therefrom to a plup bin 50 from which it may be drawn by a pump 54 as desired.  Reference is made to the possibility of adding various chemicals such as sodium sulphite, sodium hydrosulphite, sodium or hydrogen peroxide or sulphur dioxide in one or more of the refining stages. Recovered waste liquid from the process may be used to dilute the pulp before entry to the refiners instead of water. The defibrator may be of the kind disclosed in U.S.A.  Specification 2,964,250.
Patent GB-332658-A (GB)
Title: An improved telephone mouthpiece
IPC: H04M1/19
Filed: 1929-05-03
Abstract: 332,658. Charman, H. J., and Entwisle, E. F. May 3, 1929. Mouthpieces and attachments-An attachment for a telephone mouthpiece adapted to be readily operated by a listener during a telephonic conversation to prevent any sound being transmitted to the caller comprises a member 3 mounted in. the mouthpiece 1 so as to leave an annular air space communicating with the diaphragm 8 and adapted when rotated to be moved longitudinally by a pin and slot arrangement 5, 6, so as to press a rubber tube 7 on its inner end into contact with the diaphragm. In the modified construction, Fig. 5, the inner member 3 is perforated at 10 between rubber bands 11, 12, rotation of themember 3 compressing the bands against the mouthpiece 1. The longitudinal movement of member 3 may be obtained, if desired, by arranging it to slide in telescopic fashion within the mouthpiece.
Patent GB-1086807-A (GB)
Title: Double tuned frequency selective circuit
Inventor: ARNTSEN ARNT P
IPC: H03H7/01
Filed: 1965-04-01
Abstract: 1,086,807. R.F. couplings; transistor receiver circuits. WESTINGHOUSE ELECTRIC CORPORATION. April 1, 1965 [April 14, 1964], No. 13863/65. Headings H3T and H4A. An R.F. continuously tunable frequency selective circuit for providing a substantially constant pass bandwidth throughout the operative range comprises two tank circuits each with inductive and variable capacitive elements, a coupling capacitor being connected between the inductive elements at one end thereof, and a common inductor being connected in series with both inductive elements at the other ends thereof. As described, a receiving antenna 10, for example for V.H.F. signals, is connected to the primary Lp of a transformer TF1 and the secondary L s  of the said transformer is connected through an inductor L 3  to the top of a tuned circuit 31, which is thereby loaded with a resistive component R 1  of the antenna 10 which increases as the square of the tuned frequency. The tuned circuit 31 comprises an inductor L 1  and a variable capacitor C 1  and it is associated in a doubly tuned circuit 30 with a similar tuned circuit 32 comprising an inductor L 2  and a variable capacitor C 2 , the two capacitors C 1 , C 2  being ganged. Coupling between the tuned circuits 31, 32 is mainly by means of a common inductor L 5  connected to the lower ends of the inductors L 1 , L 2  but a capacitor C 5  is connected to the upper ends of the circuits to provide compensation at higher frequencies, so that the effective coupling varies inversely with the tuned frequency. The inductor L 2  is inductively coupled to an inductor L 4  connected to the base of a transistor TR operating in the common emitter mode in an R.F. amplifier 50. In addition, a capacitor C 6  is connected between the top ends of the inductors L 2 , L 4  so that a resistive component of the input impedance of the transistor which increases as the square of the tuned frequency is reflected across the tuned circuit 32. The transistor TR has a biasing network comprising resistors R 4 , R 5  and by-pass capacitor C 4 , and its emitter is connected to earth by a stabilizing resistor R 3  with by-pass capacitor C 3 . Output from a load resistor R L  is taken to a wideband amplifier 60 which feeds a mixer stage 70.
Patent GB-528587-A (GB)
Title: Improvements in or relating to compressor regulators
IPC: F04B49/10
Filed: 1939-05-09
Abstract: 528,587. Regulatirg compressors. INGERSOLL-RAND CO. May 9, 1939, No. 13878. Convention date, May 12, 1938. [Class 8 (i)] [Also in Group XXIX] A stop valve 179, Fig. 3, in the inlet of an air compressor is acted on by a piston 197 open on one side at low pressures to atmosphere through ports 203 and 218 ; when the pressure reaches a maximum the air entering by a conduit 205 acts on a valve 209 to close communication between these ports and allow access of the air to the piston, thus closing the valve 179. When the pressure falls by a certain amount, a spring 187 reopens the valve. The motor driving the compressor is controlled by a speed governor acting on the throttle valve through a lever 47, Fig. 2, against a spring 37 the pressure of which is regulated in accordance with the receiver pressure through a lever 95 connected to a bellows 93 normally subject externally to the receiver pressure admitted through a valve 121 from a conduit to the bellows chamber 79 which has a constant small discharge orifice 87, the degree of opening of the valve being determined by the pressure acting on a diaphragm 137 carrying a valve contact. By means of bolts 101, 107, 111, the device may be adjusted to give a minimum speed either at the unloading pressure or at a lesser pressure between which and the unloading pressure the speed remains constant. At the unloading pressure, the vacuum caused in the space 191, Fig. 3, is communicated by the opening of a valve 155, Fig. 2, to the space above the diaphragm 137, raising this diaphragm and freeing the valve 121, which is held closed by its spring. When the compressor is reloaded by fall of tank pressure this valve closes and air at atmospheric pressure gradually leaks into the space above the diaphragm through a small hole in the valve, so that after a certain time delay determined by the size of this hole, the control of speed by the pressure is resumed.
Patent GB-397260-A (GB)
Title: An improved resilient sports net
IPC: A63B69/00
Filed: 1932-05-14
Abstract: 397,260. Ball games. BARTLETT, G. H., The Rectory, Cley-next-the-Sea, Norfolk. May 14, 1932, No. 13884. [Class 132 (ii).] A sports net having sufficient resilience to cause a tennis ball, cricket ball, or football propelled thereagainst to be returned at considerable speed comprises an ordinary net of cord or other non-elastic substance, four elastic members or a single continuous elastic member H, Fig. 1, running through the outer meshes of the net and passing over hooks or pulleys J (or through loose rings L, Fig. III, or over pulleys attached to the loose rings) on the bars or poles of a rectangular frame of which one of the horizontal bars (and if desired also one of the vertical ones) is adjustable in slots D or by means of jaws or rings M for the purpose of producing considerable resilience in the net. In a modification, Fig. IV, each of the outer meshes of the net is attached to the frame by a short elastic cord or a spiral spring O. The frame may be supported by folding back stays F, Fig. 1, or may be fixed permanently in the ground, or may be erected inside a building, use being made of the walls or ceiling as part of the fixed frame. Three of the nets may be erected in the form of a miniature fives court.
Patent GB-439488-A (GB)
Title: Improvements in or relating to abrasive lapping machines
IPC: B24B53/02
Filed: 1934-05-08
Abstract: 439,488. Trueing abrasive laps. NEWALL ENGINEERING CO., Ltd., and SUMMERS, K. E., Old Fletton, Peterborough. May 8, 1934, No. 13890. [Class 60] In a lapping-machine employing bonded abrasive wheels a the wheels are trued by diamonds &c., b traversed by a screw c engaging a thread in a worm wheel e driven by a worm g rotated through a clutch and a friction-driven pair of bevel gears, the clutch being disengageable to allow of hand operation of the trueing- tool. The screw c is guided in a sleeve d connected to a disc i mounted on a support so as to be adjustable about the axis of the worm g, and set in operative position by a screw k, an abutment l and screws m. According to the Provisional Specification, hydraulic power may be used for moving the diamond &c.
Patent GB-573685-A (GB)
Title: Improvements in or relating to lubrication control means for valves for internal combustion engines and the like
IPC: F01L7/08
Filed: 1944-07-20
Abstract: 573,685. Valves. ASPIN, F. M. July 20, 1944, No. 13920. [Class 7 (vi)] . [Also in Group XXIX] Lubrication control means for rotary valves for internal-combustion engines and the like, of the kind in which the rotary valve member 11, and its housing 10, have complementary tapered bearing and gas-sealing surfaces, and in which the rotary valve member has an end area subject to axial loads generated by the fluid pressures in the cylinder, comprises annular rings 15, 16, located in grooves immediately above and below the port or ports 13, 14 in the valve member 11, having conical peripheries complementary to and engaging the valve seating. The valve member is allowed limited axial movement and is held to its seating by a loading spring 20. Upper sealing rings 17 and lower rings 18 are also provided. Two or more rings may be used in place of the single rings employed in the example shown; these may be mounted in separate grooves or in the same groove. The rings may be .located in the housing instead of on the rotary member. Specifications 463,412 and 564,850 are referred to.
Patent GB-777775-A (GB)
Title: Improvements in or relating to the manufacture of metal powders
Inventor: JONES WILLIAM DAVID
IPC: B22F9/08
Filed: 1955-05-13
Abstract: Ferrous metal powders, the particles of which are smooth and rounded, are produced by atomizing a melt containing boron or titanium in conditions which, in the absence of the boron or titanium, would yield non-spherical particles.
Patent GB-290834-A (GB)
Title: Improvements in combined domestic tables and wringing or mangling machines
IPC: A47B77/12
Filed: 1927-05-24
Abstract: 290,834. Skinner, A. E. May 24, 1927. Folding mangles and wringers.-A combination table and wringer or mangle is designed so that the wringer or mangle when not required is housed in a cupboard-like structure forming the body of the table. Fig. 6 shows a wringer 2 mounted on a. Leaf 3 hinged to a fixed part 4 of the top of a table which comprises a cupboard-like part 6 and hinged leaves 8, 14. When the wringer is not required, it may be turned down into the body cf the table and enclosed bv doors on the front of it. The removable leaf 9 is then replaced, being supported by bars 10 extending into stirruplike guides on the underside of the leaf 3. The leaves 8, 14 are raised and are supported by hinged brackets. At the ends of the leaf 8 are draw-out bars 16, which support small square corner leaves hinged to the leaves 14, adapted to fill the corners between the ends of the leaves 8, 14. The ends of the leaf 8 may be similarly supported by small draw-out bars on the undersides of the leaves 14. The underframe work of the cupboard, which may be stiffened by corner struts, serves as a support for a clothes basket.
Patent GB-996549-A (GB)
Title: Dipstick assemblies for material handling equipment
IPC: E02F3/30
Filed: 1964-04-03
Abstract: 996,549. Shovelling-machines. E. V. MROZEK. April 3, 1964, No. 13999/64. Heading E1F. In a backhoe 14 mounted on a turntable 12 and having a pivotable boom 16, a dipstick 66 is rotatable and reciprocable in a pivot frame 26 comprising coaxial bearing rings 48, 50 in which are journalled support discs (Figs. 3, 4 not shown) non-rotatably carrying the dipstick. The frame 26 is pivotally connected at 28 to the outer end of the boom. All movement is effected hydraulically, the
Patent GB-982120-A (GB)
Title: Improvements in or relating to blocking layer capacitors
IPC: H01G4/28
Filed: 1963-04-09
Abstract: 982,120. Capacitors. SIEMENS & HALSKE A.G. April 9, 1963 [April 10, 1962], No. 14054/63. Drawings to Specification. Heading H1M. A ceramic blocking-layer capacitor has electrodes in the form of layers comprising a metal having a high work function wherein at least one of the layers includes a glass melting below 500‹ C. and having as its major constituents the oxides of silicon, lead and boron. The metal may be silver and the layer preferably has a thickness greater than 5 microns, for example about 15 microns. The capacitor may be made by firing a ceramic material, sintering it, and reducing the sintered material to render it conductive; forming electrode layers by applying a paint containing the metal and glass; and finally welding in the electrode layers by heating. The paint preferably comprises 40-60% by weight of silver, 35-55% of one or more organic resins or oils, and 0À5-5% of glass. The paint may contain water as required as a vehicle. The silver may be replaced by one of the platinum group of metals or by gold.
Patent GB-960738-A (GB)
Title: A new process for preparing dl-ribose
IPC: C07H15/04
Filed: 1962-04-11
Abstract: DL-ribose is prepared by subjecting a compound of formula R-O-CH2-CH=CH-R1, in which R is a 2-tetrahydropyranyl or 2-tetrahydrofuryl group and R1 is a hydrogen atom, a C 1-C3 alkyl group: <FORM:0960738/C1/1> to ozone oxidation followed by decomposition of the ozonide to form a compound of formula: R-O-CH2-CHO; reacting this compound in an inert solvent at a temperature in the range -60 DEG C. to 100 DEG C. with a compound of formula: <FORM:0960738/C1/2> in which M is an alkali metal or MgX (X is Cl, Br or I), and R2 is a C 1-C3 alkyl group, to give a compound of formula: <FORM:0960738/C1/3> subjecting this compound to partial hydrogenation is the presence of a palladium, platinum or nickel catalyst to form a compound having the formula: <FORM:0960738/C1/4> reacting the latter compound with a permanganate, hydrogen peroxide or osmium tetroxide in an inert solvent at 0 DEG  to -30 DEG C. to form a compound of formula: <FORM:0960738/C1/5> and treating this latter compound with a dilute mineral acid.  The allyl alcohol derivatives of formula R-O-CH2-CH=CHR used as starting materials are prepared as follows:-(a) the derivatives in which R1 is a hydrogen atom are prepared by reacting allyl alcohol with dihydropyran or dihydrofuran in the presence of a trace of mineral acid; and (b) those in which R1 is: <FORM:0960738/C1/6> are obtained by reacting butynediol with dihydropyran and/or dihydrofuran in the presence of a trace of mineral acid and partially hydrogenating the resulting compound.
Patent GB-593722-A (GB)
Title: Improvements in non-refillable closures for bottles
IPC: B65D49/02
Filed: 1945-06-05
Abstract: 593,722. Non-refillable bottles. DIAZ, M.D. June 5, 1945, No. 14190. [Class 125 (i)] A non-refillable closure for a bottle is made of plastic material and comprises a flanged cup serving as a seat for a freely movable valve, a perforated disc and a cap having an integral perforated disc, a skirt portion surrounding the neck of the bottle and a shoulder, the flange of the cup and the disc being seated between the shoulder of the cap and the mouth of the bottle with the interposition of a packing washer. The cup 2 having a central hole 3 and a freely movable solid disc valve 6 rests by means of its flange 4 with the interposition of a packing washer 5 on the upper edge of the container 1. The cup 2 is surmounted by a perforated disc 10 having four holes 12 surrounding a central hole 11 and on its lower face four pointed projections 13, alternate with the holes 12, which prevent adherence of the disc 6. The cap or cover 8 having a shouldered portion 9 adapted to hold the disc 10 and flange 4 of the cup in position. is open at the top and has an upper section 8' of reduced diameter having near its middle height an integral partition 14 with four equidistant openings 15. The shoulder 9 engages a recess 17 in disc 10 by means of a projection 16 on its lower surface so that the openings 15 do not register vertically with the holes 12. The cap is secured to the neck of the bottle by means of an annular layer 21 of material such as sealing wax and has a thread on its surface to receive a threaded cap.
Patent GB-501319-A (GB)
Title: Improved process for the treatment of bricks
IPC: C04B41/72
Filed: 1938-05-12
Abstract: 501,319. Treating bricks. LAING & SON, Ltd., J., and MOORE, J. May 12, 1938, No. 14201. Drawings to Specification. [Class 22] Sandlime or calcium silicate bricks are treated to remove surface lime and expose the colour of the aggregate, by treatment with an acid, such as hydrochloric acid. The bricks may be carried by an endless belt which carries them through a water bath, then through a bath containing a 25 per cent solution of hydrochloric acid and then through a second water bath.
Patent GB-710224-A (GB)
Title: Improvements relating to organo-tin compounds and process of preparing same
Inventor: JOHNSON ERNEST WILLIAM
IPC: C07F7/22
Filed: 1952-06-05
Abstract: <PICT:0710224/IV (b)/1> Organo-tin compounds of the general formula R2SnX2, wherein R represents an alkyl, aryl or aralkyl hydrocarbon radical and X represents halogen, are prepared by heating a mixture of the compounds RSnX3 and R3SnX to form the desired compound R2SnX2, reducing the pressure on the reaction mixture and continuing the heating to distil out the desired compound R2SnX2 and any more volatile material, collecting the distillate and heating it to distill off said more volatile material containing RSnX3 and returning it to the reaction mixture.  The process may be carried out at a temperature in the range of about 135 DEG  to about 225 DEG  C. The process may be modified by heating a mixture of the compounds R4Sn and SnX4 to form a mixture of R2SnX2, RSnX3 an R3SnX, and the process referred to above is then followed, R and X having the significance indicated above. Organo-tin compounds of the general formula R2R12Sn in which R and R1 are different and represent alkyl, aryl or aralkyl hydrocarbon radicals are prepared by a similar process from a mixture of the tin compounds RR13Sn and R3R1Sn.  This process may be carried out at a temperature between about 175 DEG and 225 DEG  C.  The process may be modified by forming the initial reaction mixture by heating the compounds R4Sn and R14Sn, where R and R1 have the significance indicated above.  A compound of the formula R4Sn or R14Sn above may be a tin aryl such as a tetraphenyl, tetratolyl or tetraxylyl tin, a tin alkyl such as a tetraethyl, tetrabutyl, tetrapropyl, tetraisobutyl, tetramyl, tetraisoamyl, tetrahexyl, or tetralauryl tin, a tin aralkyl such as tetrabenzyl tin, a mixed tin alkyl such as dibutyl diamyl or butyl trilauryl tin, or a tin alkyl-aryl such as butyl triphenyl or dibutyl diphenyl tin. The tin tetrahalide SnX4 may be tin tetrachloride or tetrabromide. In the examples diphenyl tin dichloride and dibutyl diphenyl tin are prepared.  Other compounds which may be prepared are butyl amyl tin dichloride, butyl phenyl tin dichloride and dibutyl diamyl tin.  The process may be carried out in the apparatus illustrated in the Figure, e.g. to prepare diphenyl tin dichloride.  Tetraphenyl tin and stannic chloride are charged to reactor 10 via line 11, the reaction is initiated by heating and the reaction mixture is placed under vacuum by connecting pipe 12 to a source of low pressure.  Phenyl tin trichloride and diphenyl tin dichloride distil out through line 13 to fractionator 14 where they are separated, the phenyl tin trichloride passing through line 18 to condenser 19 and thence via line 20 to reactor 10 and also through line 22 to serve as reflux, the diphenyl tin dichloride being removed through line 23.  The triphenyl tin chloride remains in the reactor 10 and is available for reaction with the phenyl tin trichloride returned through line 20.
Patent GB-107887-A (GB)
Title: Improvements in Folding Packing Cases and the like.
IPC: B65D6/18
Filed: 1916-10-06
Abstract: 107,887. Falk, Stadelmann, & Co., and McClelland. A. R. Oct. 6, 1916. Folding boxes &c.-The ends b are hinged so as to be foldable on to the bottom a, the front c folding on to them about hinges f formed with links k. The back d folds on to the underside of the bottom, the lid h hinged to it coming between the parts a, d and the hinges of the parts d, being formed with links. Battens l projecting beyond the edges of the parts encircle the body of the box &c. and form stops or abutments when the box is set up. In this condition, the parts are locked by U-shaped boits n permanently connected to and sliding in sockets o and adapted to engage in other sockets p; similar fastenings may be provided at points such as q or, for securing the lid, as at r. Cords or straps s secured to the back are made to encircle the collapsed parts, to bind them together. Should the ends b be such as to overlap one another when folded, the hinges of one of them would be provided with links.
Patent GB-1276214-A (GB)
Title: Antistatic linear polyester compositions
IPC: C08K5/41
Filed: 1970-03-24
Abstract: 1276214 Antistatic polyester composition TORAY INDUSTRIES Inc 24 March 1970 [2 April 1969 5 April 1969 (2) 22 Sept 1969] 14284/70 Heading C3R An antistatic composition based on a linear polyester, preferably with at least 80% of its repeating units based on terephthalic acid, comprises also a polyamide-polyether block copolymer and a metal salt of a sulphonic acid. The block copolymer comprises 0À2 to 5À0% of the weight of the composition, the polyether units comprising 0À1 to 2À0% of the total weight and 20 to 75% of the weight of the block copolymer itself. The relative viscosity of the block copolymer measured in o-chlorophenol is preferably 2À0 to 3À1 and may be controlled by incorporation of monofunctional acids or amines or by solid-phase polymerization prior to formation of the composition. The metal salt is preferably the Li, Na or K salt of an alkyl- or alkylaryl-sulphonic acid having 8 to 19 carbon atoms and should comprise 0À01 to 5% by weight of the composition. It is preferably absorbed into the solid block copolymer by means of a suitable solvent before mixing with the polyester. Coloration of the composition may be reduced by including also phosphorous acid or a derivative thereof such as a metal phosphite or a phosphite ester e.g. in an amount of 0À001 to 2À0% of the weight of the composition.
Patent GB-1090116-A (GB)
Title: Improvements in or relating to the manufacture of patterned metal sheet
Inventor: SARGINSON NEIL MERRICK
IPC: B21H7/00
Filed: 1964-04-07
Abstract: 1,090,116. Making patterned sheets; die rolling. BRITISH ALUMINIUM CO. Ltd. April 5, 1965 [April 7, 1964], No. 14303/64. Headings B3A and B3M. In a method of manufacturing patterned metal sheet 1 the sheet is pressed by rollers 5 against the surface of a stencil or die 2, through a resilient media, e.g. rubber pad. Alternatively the rubber pad may take the form of a continuous band extending around the roller remote from the stencil or the said roller may be formed with a resilient surface. The stencil is formed from metal or glass fibre.