baber/WOPTO huggingface dataset:
Patent GB-709595-A (GB)
Title: Resolution of a racemic propane diol
Filed: 1952-04-03
Abstract: Racemic 2 - amino - 1 - p - nitrophenyl-propane-1,3-diol is resolved by forming an aqueous solution containing a water-soluble salt derived from a mineral acid such as hydrochloric or nitric acid, of the racemic diol together with a salt of the same acid and the corresponding d- or l-isomer and thereafter effecting fractional precipitation of the racemic and optically active bases by basifying the solution by the addition thereto of a mineral base, preferably an alkali metal hydroxide, which forms a soluble salt with the said acid.  Preferably the d-isomer is added when as a result an almost pure d-base will first be precipitated, then a mixture of the l-base and a small amount of dl-base and afterwards the dl-base containing a small quantity of d-base.  The l-base of the second fraction may be purified by fractional precipitation from an aqueous solution of a water-soluble salt such as the hydrochloride.  Precipitations are preferably effected at room temperature.  The quantity of active base used may be between about 25 and 100 per cent of the weight of the racemate. An optimum quantity of around 50 per cent is quoted for addition p  of d-base.  The process is particularly effective for isolating the l-threo epimer.  In an example, racemic and d-threo 2-amino-1-p-nitrophenyl-propane-1,3-diol are dissolved in hydrochloric acid and fractional precipitation effected at 20 DEG  C. by the addition of caustic soda.
Patent GB-398271-A (GB)
Title: Improvements in and relating to the manufacture of can-ice
IPC: F25C1/04
Filed: 1932-03-23
Abstract: 398,271. Ice-making. PERMAN, P. E., 16, Sibyllegatan, Stockholm. March 23, 1932, No. 8700. Convention date, March 24, 1931. [Class 29.] A plant for making ice blocks having central holes of a predetermined size comprises a chamber having a tank 7 containing a circulating cooling liquid in which are immersed rows of ice cans 5 supported by frames 6 adapted, when the blocks have reached the desired thickness, to be removed together with the cans by an overhead travelling crane to a pivotally-mounted draining trough 12. After drainage of the cans by tilting of the trough, the blocks are released from the cans by a warm water spray issuing from a pipe 33 into a tank containing a heater 30. Circulation of the warm water is maintained by a pump 32. From the cans the blocks slide down guideways 38, by which they are turned through a right-angle on to their sides, on to vertically adjustable rotatable tables 28. The blocks are stacked on the tables in oppositely-arranged layers and removed therefrom by an overhead crane including a beam 47 having depending arms 46, the horizontal limbs 3 of which are adapted to be inserted in the holes in the blocks of alternate layers. The water in the cans is agitated during the freezing operation by air jets issuing from pipes 21 supported by the frames 6.
Patent GB-195862-A (GB)
Title: Improvements in mortise and tenon joints
IPC: F16B12/22
Filed: 1922-03-27
Abstract: 195,862. Hatcher, F. March 27, 1922. Joints, carpenters' &c. -A carpenters' joint for use in constructing the frames of deck chairs and the like comprises a circular tenon b on one member and a mortise d in the other, the joint being made secure by a pin f driven into a recess situated partly in the tenon and partly in the frame surrounding the mortise.
Patent GB-619770-A (GB)
Title: Improvements in or relating to thermionic valves
IPC: H01J19/00
Filed: 1946-03-21
Abstract: 619,770. Making grids for thermionic valves. HIVAC, Ltd., and DIGGLE, H. March 21, 1946, No. 8834. [Classes 83 (ii) and 83 (iv)] Electric welding.-Thermionic valve grids are formed by welding or swaging wires to a flat, apertured, sheet-metal frame. A wire 8 guided by arm 9 on a lead-screw is wound round an apertured metal band 1 and welded thereto by completion of a welding circuit through rollers 6, 7, drum webs 5 conducting common drum shaft 4 and conducting drum 2. In a modification the connection between the identical bands is achieved through further rollers and connections. The band is subsequently divided to form tagged half-grids. In a further modification the wire is wound and welded or swaged to rods held between disc faces, pairs of rods being subsequently separated. The swaging is performed by making incisions in the frame ahead of the wire as it is wound, and closing them over to grip the wire by a roller device.
Patent GB-866734-A (GB)
Title: Systemic fungicidal compositions
IPC: C07H15/12
Filed: 1959-03-13
Abstract: Systemic fungicidal compositions comprise as active ingredient an N-substituted amino sugar of the general formula <FORM:0866734/VI/1> wherein Z is the radical of a reducing sugar and R is an alkyl, aryl or heterocyclic radical or the radical -NHR1 in which R1 is the same as R or is -COR11, -CSR11 or -SO2R11, R11 being an alkyl, aryl or heterocyclic radical in admixture with a solid diluent or carrier or with water containing an emulsifier.  The constituent Z may be the radical derived from glucose, galactose, fructose, gulose, arabinose, glucosamine, lactose or maltose or from the mixture of products from the condensation of formaldehyde in the presence of lead oxide or from an aldehyde sugar of the C4 or C5 series or from glyceraldehyde or from an oligosaccharide with a free aldehyde group.  Specified active ingredients are those wherein Z is the radical derived from glucose and R is p-chlorophenyl, o-chlorophenyl 2,4-dichlorophenyl, benzene-sulphamide, phenylamido or p-nitrophenylamido.
Patent GB-804348-A (GB)
Title: Improvements in or relating to coating compositions
IPC: C09D195/00
Filed: 1955-03-25
Abstract: A corrosion-inhibiting cold-dip bitumastic primer comprises coal tar, benzene and silica black in the approximate ratio of 42, 33 and 25 per cent, by weight, respectively, and from about 0.002 to 0.1 parts of a sulphonate per 100 parts of primer, the cation of the sulphonate being inorganic.  Preferred sulphonic acids include those prepared by sulphonation of the products known as secondary cycle oil, of the alkylation products of benzene, toluene or xylenes with dodecylene or dodecylchloride, and of the mixture of monoalkylbenzenes and dialkylbenzenes known as polydodecylbenzene.  Others include those obtained by sulphonating various petroleum fractions, and alkylation products of mono- and polynuclear hydrocarbons.  The cation of the sulphonate may be, e.g. lithium, sodium, magnesium, calcium, strontium, barium, copper, cobalt, nickel or ammonium.  The silica black is a condensate obtained by vaporizing silica in an are whose anode contains silicon and carbon.  Specification 804,346, [Group IV (b)], is referred to.
Patent GB-753160-A (GB)
Title: Method of making p-n crystals of germanium or silicon semiconductors
IPC: C30B15/20
Filed: 1954-03-26
Abstract: 753,160. Coating by vapour deposition. STANDARD TELEPHONES & CABLES, Ltd. March 26, 1954 [April 2, 1953], No. 8926/54. Class 82(2). [Also in Group XXXVI] A portion of an N-type germanium or silicon crystal is converted to P-type conductivity by depositing copper or nickel on the surface of the crystal as this is withdrawn from an N-type molten mass. The deposition occurs near the surface of the melt so that the P-type conductivity induced by the diffusion of the copper or nickel, is retained by the subsequent rapid cooling of the withdrawn crystal. Copper and nickel in germanium or silicon have high segregation coefficients, so that in the absence of the rapid cooling, these impurities would be expelled from the semiconductor as this freezes, and the converted portion of the material would then return to N-type conductivity. Fig. 1 shows a crystal 1 being withdrawn from a melt 2 of N-type germanium. A copper ring 3 heated for example by eddy currents, is arranged above the surface of the melt so that copper is diffused into the germanium. The depth of penetration may be controlled by adjusting the rate of crystal withdrawal, the position of the ring, and the duration of heating the ring. Alternatively, the crystal may be withdrawn in the form of a plate by means of rollers which may be heated, a heated copper or nickel wire being arranged close to the plate. The wire may have V-shaped sections separated by a screen so that small isolated regions of P-type conductivity are produced. Specification 753,133 [Group XXXVI] is referred to.
Patent GB-550755-A (GB)
Title: Improvements in and relating to creping treatment to paper or the like and product
IPC: B31F1/12
Filed: 1941-07-17
Abstract: 550,755. Pleating paper. AMERICAN REINFORCED PAPER CO. July 17, 1941, No. 9058/41. Convention date, Aug. 1, 1940. [Class 141 [Also in Group VIII] Paper e.g. comprising kraft plies united by asphalt and reinforced with fibrous strands, is irregularly pleated, so that it may be stretched in various directions, by passing it between two pairs of rollers 18, 22, Fig. 2, relatively reciprocated axially as by a link 44 and gear 48, a grooved guideway 40 receiving a base-plate of the roller framework. At each extremity of reciprocation, the web 2 tightens to form undulations 2b, 2c as illustrated which are pressed into pleats 61, Figs. 2 and 4, as the web passes between the rollers 22. The web may be submerged in water 10 before treatment.
Patent GB-1424719-A (GB)
Title: Roof fan
IPC: F24F7/02
Filed: 1973-02-23
Abstract: 1424719 Centrifugal and axial-flow fans BUTTNER - SCHILDE - HAAS AG 23 Feb 1973 [28 Feb 1972] 9077/73 Heading F1C [Also in Divisions F3 and F4]  A set of parts for making a range of roofmountable air extraction fans having different diameters and air discharge directions, comprises centrifugal flow impellers, axial-flow impellers,  driving motors to be mounted inside or outside  impeller housings, mounting plates to which the  impeller housings are to be attached, each housing of all fans of the same diameter including a common dished bottom element 1 having a suction aperture and a cylindrical central element 4 or 5 which is perforate or imperforate for horizontal or vertical air discharge respectively, upper rings 3 for attachment to the elements 5 of vertical discharge fans and motor cover elements, the motor cover elements of vertical discharge fans being motor cover elements designed for use in horizontal dis-  charge fans of smaller diameter and having the driving motor inside the impeller housing. In the form shown, both fans include centrifugal impellers with motors inside the impeller housings and the motor cover element 2a of the vertical discharge fan is a smaller version of the cover element 1a of the horizontal discharge fan. The upper rings 3 may be formed by cutting away the central area of bottom elements or motor cover elements. The driving motor may be arranged above the impeller Figs. 3 to 5 (not shown) within a motor housing formed by elements 5, 1 of a fan of smaller diameter. In another embodiment, the motor is mounted in a trumpet-shaped hollow body (7) formed by the hub (6) of a centrifugal flow impeller of a fan of smaller diameter. In the case of an axial-flow impeller, the hollow body (7) acts as an air guide.
Patent GB-733103-A (GB)
Title: Improvements in or relating to biassing arrangements in battery operated radio receivers
Inventor: WETHEY EUGENE PETER
IPC: H04B1/16
Filed: 1953-04-02
Abstract: 733,103. Valve amplifying circuits. KOLSTER-BRANDES, Ltd. April 2, 1953, No. 9145/53. Class 40 (6). In a battery-operated radio receiver, using a pair of output valves operating in quiescent push-pull, so that the anode current changes to a considerable extent, according to the signal level, the grid bias is obtained from a non-linear resistor 6 in the common H.T. - feed. The resistor is of the type in which the potential dropped is largely independent of the current through it, so that the bias does not appreciably vary with signal level.
Patent GB-472610-A (GB)
Title: Improvements in and relating to permanent hair waving and curling
IPC: A45D7/06
Filed: 1936-03-27
Abstract: 472,610. Hair - waving appliances. SARTORY, P. March 27, 1936, No. 9205. [Class 131] An envelope or steaming-tube for repeated use for passing over a curler carrying a coiled hair tress comprises a body portion A of waterproof cotton, linen or silk having an interlining 1 of tin or other metal foil covered by a lining 2 of asbestos cloth. Metal strips 3, 4 in hems in the longitudinal edges of the body A form foundations for the spring stud fastening elements 5, 5a. An extension B of the body A is stitched down to form a hem for a drawstring 8. On the strip 3 is a bent end 3a to secure the steaming or heating pad.
Patent GB-397062-A (GB)
Title: Improvements in and relating to drilling, boring, milling, and like machine tools
IPC: B23Q11/00
Filed: 1933-03-27
Abstract: 397,062. Drilling &c. machines. SOC. GENEVOISE D'INSTRUMENTS DE PHYSIQUE, 8, Rue des Vieux Grenadiers, Geneva, Switzerland. March 27, 1933, No. 9226. Convention date, Sept. 17, 1932. [Class 83 (iii).] In a boring, drilling, milling, or like machine having a rotary spindle 3 axially movable on a support 4 which is itself movable on the machine frame 1, a lever 5 is pivoted at 5b, 5c respectively to the spindle and support and has a balancing force applied thereto at 5a, the distances 5a-5b and 5a-5c being inversely proportional to the weights of the spindles and support so that the same balance weight 8 is effective for the spindle and support. The weight of the balance weight 8 is made the same as the sum of the weights of the spindle and support.
Patent GB-1127462-A (GB)
Title: Improvements in or relating to adhesive compositions
IPC: C09J7/38
Filed: 1966-03-02
Abstract: 1,127,462. Adhesive coatings. TENNECO CHEMICALS Inc. 2 March, 1966 [3 March, 1965], No. 9239/66. Heading B2E. [Also in Division C3] A pressure-sensitive adhesive tape comprises a polyethylene terephthalate film backing coated with a composition comprising 100 parts by weight of an elastomer and 60 to 140 parts by weight of dipentene in the form of a polydipentene resin having a softening point in the range 10 to 160C. Suitable elastomers are natural rubber, homopolymers of butadiene, isoprene and isobutylene, and copolymers of butadiene with styrene and isobutylene with isoprene. The compositions may be applied to the backing in a solvent.
Patent GB-695322-A (GB)
Title: Improvements in or relating to plant for producing fuel gas by digestion of waste organic matter
IPC: C12M1/107
Filed: 1951-04-20
Abstract: <PICT:0695322/IV (b)/1> A plant for producing fuel gas, principally methane, by digestion of waste organic matter, comprises a digester tank, a slurry feed pipe which forms an axle for rotation of a set of stirrers within the tank, a used slurry outlet, and a gas holder engaging said tank.  The tank 1 is fed with a slurry of waste and water by feed-pipe 3 until it begins to come out of discharge pipe 11. Pipe 3 rises in the centre of the tank at 5 and carries a tube 16 on which stirrer blades are radially mounted.  An extension of the feed-pipe forms a housing for the gas pipe 6 communicating with gas discharge pipe 7 having a trap 10 for separation of moisture.  The gas holder 2 is inverted in the slurry or in an annular chamber formed between the tank and a jacket 22 or an inner wall, and filled with water 23.  The top blades 17 of the stirrer consist of vertical plates while the others consist of oppositely inclined plates 18, 19 to throw up and force down the slurry, respectively.  Guides at the ends of the blades may engage channels on the inner wall of the gas holder or guide-sockets 21 may engage rods 15 on the holder so that rotation of the latter, as by a crank 27, is transmitted to the stirrer.  A screw conveyer 13 may be located in pipe 11 and the discharged slurry fed to a tank on top of the digester and divided by a filter screen into two compartments, the filtered liquid being returned with fresh feed.
Patent GB-272452-A (GB)
IPC: G03B23/12
Filed: 1927-04-04
Abstract: 272,452. Trans-Lux Daylight Picture Screen Corporation, (Assignee of Birdsall, W. T.). June 8, 1926, [Convention date]. Optical-projection apparatus.-In an optical-projection cabinet containing a projector, having a projection screen, and provided with reflectors directing the projection beam to the screen, the slide or other picture carrier is arranged behind the last reflector; the cabinet may also contain a readily removable slide conveyer, and ducts conveying air currents to and from the lamp house in such manner that they do not pass through the main body of the cabinet and cause dust to be deposited on the slides. As shown in sectional plan in Fig. 4, light passes from a lamp 63, through a condenser 44 and slide holder 21, on to a mirror 68, through an objective 72, and, by reflection in mirrors 69, 70, 66, on to a projection screen 9 held in a frame 10 secured to the front of a casing 1. The mirrors 68, 69 are carried by brackets 75, 76, each having a resilient arm 80 engaged by a screw 84 by which the position of the mirror may be adjusted. The mirrors 66, 70 are pivoted on central vertical axes. The lamp house 55 is secured to the condenser housing, and is provided with inlet and outlet ducts 61, 58 registering with openings in the back 3 and top of the casing. The condenser housing is pivoted at 49 to a frame member 13, and is also normally secured by bolts through a bracket 51 to the member 13; by removing the back 3 of the casing, and the bolts, the lamp house &c. may be swung out to facilitate access to the slide conveyer. The slides may be carried on holders 21, Fig. 1, secured by rivets at the middle of each side to a, flexible endless strip 19 of sheet copper &c. mounted on rollers 15, 16 carried by bearings on the frame 13. The strip 19 has marginal perforations engaging teeth on the roller 16, and the roller 16 is driven intermittently by a chain &c. from a motor within the casing. The rollers 15 are not driven, and one of them, 15<1>, is carried by a pivoted arm 64 pulled by a spring 65 to keep the strip 19 taut. The base 5 of the casing is formed with a peripheral flange 6, so that the apparatus may be mounted on a pedestal, and with flanges 87, so that by cutting away the metal of the base plate within them, slots are formed through which the slide conveyer may extend into the pedestal, when it is desired to use a long conveyer. Specification 272,453 is referred to.
Patent GB-690387-A (GB)
Title: Improvements in or relating to the catalysts for the polymerization of olefins
IPC: B01J27/185
Filed: 1950-04-17
Abstract: Olefins are polymerized to products containing hydrocarbon constituents boiling in the motor fuel boiling range in the presence of a catalyst comprising silica gel, at least 50 per cent of a phosphoric acid, and 0.1-15 per cent nickel or copper phosphate (see Group III).  The hydrocarbon feed may contain 30-50 per cent olefins, the remainder being paraffins. Polymerization may be carried out at 300-900 DEG  F. and at 50-1500 lbs./square inch gauge pressure.  To prevent dehydration of the catalyst, water may be injected into the reaction zone or the feed may be contacted with water.  Fixed bed, slurry, or fluidized processes may be employed.  In the slurry process, liquefied hydrocarbons mixed with the catalyst are passed upwardly through a reaction zone, and reaction products are separated, leaving a slurry containing the catalyst which is returned to the reaction zone.  In the fluidized process, hydrocarbons in gaseous form are led as fluidizing medium into a bed of catalyst, the reaction gases are contacted with water, and the catalyst slurry formed returned to the reactor.ALSO:Catalysts for the polymerization of olefins to products containing hydrocarbon constituents boiling in the motor fuel boiling range comprise one or more phosphoric acids supported on silica gel and promoted with nickel or copper phosphate; the amount of phosphoric acid is at least 50 per cent, preferably 70-80 per cent, and the amount of nickel or copper phosphate is 0.1-15 per cent, preferably 1-5 per cent, by weight based on the total weight of the catalyst.  Orthophosphoric, pyrophosphoric, permonophosphoric, and perdiphosphoric acids are suitable acids. The nickel or copper phosphate may be formed during preparation of the catalyst by reaction between nickel or copper oxide and the phosphoric acids.  The catalysts may be prepared by mixing silica gel, phosphoric acid, and nickel or copper oxide or phosphate, grinding in a ball mill, drying in two stages at 225 DEG -480 DEG F, and calcining at 450 DEG -900 DEG F.  The use of the catalysts for the polymerization of olefins in fixed bed, slurry, and fluiudized processes is described (see Group IV (b)).
Patent GB-1160494-A (GB)
Title: Yarn Feed Device for a Knitting Machine.
IPC: D04B15/48
Filed: 1968-02-27
Abstract: 1,160,494. Knitting-machines. INSTITUT TEXTILE DE FRANCE. 27 Feb., 1968 [27 Feb., 1967], No. 9357/68. Heading D1C. To maintain the yarn fed to the needles of a straight bar machine at substantially constant tension to ensure that the loop structure remains uniform, a yarn guide bracket 25 through which the yarn is guided to the carrier is interposed between a feed roller 21 and the carrier 8 and is, movable up and down to maintain the distance between the guide end 34a and the carrier constant. In addition, the feed roller 21 is controlled by a drive which is influenced by the position of the carrier bar and slur cock. The roller is driven through a drive comprising a brake and clutch which operate to start or stop the roller according to the position of the carrier bar and slur cock. The carrier bar further drives through rack and pinion mechanism 33 a cam 30 which reciprocates the bracket 25 so as to maintain the distance between the guide and 34a and the carrier 8 constant. Consequently the rate of feed and the relative position of the guide end 34a and carrier are maintained at a relationship which achieves a constant tension on the yarn and assists in producing a uniform loop structure. Instead of a rack and pinion arrangement the carrier bar may carry a cam surface engageable by a follower fixed directly to the bracket 25 such that the reciprocatory movement is achieved direct from the carrier bar movement.
Patent GB-434695-A (GB)
Title: Improvements in clarifying tanks for water purifying apparatus
IPC: C02F1/52
Filed: 1935-03-26
Abstract: 434,695. Gravity-separation apparatus. HAGEMANS, K. L., 16, Haarlemmerweg, Leiden, and NAAMLOOZE VENNOOTSCHAP MACHINEFABRIEK REINEVELD, 126, Haagweg, Delft, both in Holland. March 26, 1935, No. 9381. Convention date, April 7, 1934. [Class 46] Water to which reagent has been added is supplied to a settling-vessel 11 through a trough 2, fitted with baffles, a central tube 3, lateral passages 4, 5 and annular chambers 6, 7. The tube 3 and the chambers 6, 7 are open at their lower ends and the chambers 6, 7 taper at their upper ends and are pierced by apertures or slots 9, 10 having a total area less than that of the chambers. The upwardly flowing water is distributed by these apertures. The purified water passes away by an overflow trough 14 and settled sludge is discharged through a valve 13.
Patent GB-1457727-A (GB)
Title: Abrasive products
IPC: B24D3/00
Filed: 1975-03-06
Abstract: 1457727 Abrasive products EDENVALE ENG WORKS (PTY) Ltd 6 March 1975 [7 March 1974] 9436/75 Heading C4V An abrasive product has a working face comprising a bonding matrix containing needleshaped cubic boron nitride particles, at least 50% of which are aligned so that their long axes are substantially normal to the working surface. The abrasive product may be a segment for a grinding wheel or the operative portion of a grinding wheel. A preferred bonding matrix is a phenol-formaldehyde or polyimide resin. The abrasive particles are preferably metal-coated particularly when the matrix is a resin. A preferred coating is nickel and is preferably present in amount between 30 and 80% by weight on the coated particle. The particles may be aligned by means of an electrostatic process or by an impressed magnetic field. In the latter case a magnetic coating is necessary on the particles and the bonding matrix would need to be non- magnetic. Suitable magnetic materials are cobalt, nickel and iron.