baber/WOPTO huggingface dataset:
Patent GB-1138025-A (GB)
Title: Transistor device and method for the production thereof
IPC: H01L21/312
Filed: 1966-12-24
Abstract: 1,138,025. Transistor gate insulation. UNION CARBIDE CORP. 24 Feb., 1966 [25 Feb., 1965], No. 8077/66. Heading H1K. A p-xylylene polymer is used as the gate insulation of a field-effect transistor. The polymer may be poly-(p-xylylene) itself or may have as its basic units α- and/or nuclearsubstituted p-xylylene radicals. In the embodiment of Figs. 1 and 2 (not shown), a silicon wafer (1) is polished and etched, and then heated in oxygen/steam to form a silicon dioxide layer (5, 12). This is photo-resist masked and etched with hydrofluoric acid to form holes into which boron trioxide is deposited and diffused in to form source and drain retions (3, 4). The regrown oxide is removed from these regions which are then metallized. After removal of silica from between the source and drain regions p-xylylene polymer gate insulation (6) is deposited. A cyclic p-xylylene dimer may be heated to above 150 C. and the vapour passed through a heated tube to raise its temperature to between 400 and 700 C.; the heated vapour is directed from a nozzle in an evacuated chamber on to the masked substrate held at a temperature in the range - 40 to +50 C.; the vapour may be diluted with nitrogen, carbon dioxide, or helium. (In a variant the polymer is deposited on the unmasked substrate and then selectively removed by ion or electron bombardment or by glow discharge.) To complete the transistor an aluminium gate electrode (7) is formed by vacuum deposition and is extended over the silica to provide a region where the lead may be attached by thermo-compression bonding without damaging the organic gate insulation. Instead of a cut wafer, mono- or polycrystalline silicon may be deposited on a silicon or sapphire substrate. Germanium or gallium arsenide may replace silicon. A semi-conductor body may be shaped to provide a narrow channel on each side of which a gate may be formed. Depletion mode transistors may be made by forming a diffused " inversion " layer during manufacture. An array of interconnected devices may be formed sharing source and drain regions between successive transistors. T.F.T. may be produced. Preferred polymers are poly - (p - xylylene), poly - (2 - chloro - p - xylylene), and poly-(α,α,α<SP>1</SP>,α<SP>1</SP> - tetrafluorop-xylylene). α- and nuclear-substituent in general include halogens, and lower alkyl, cyano, phenyl, amino, nitro, carboxy, and benzyl groups. The polymers may be prepared by pyrolysis of the cyclic dimer at 400-700 C., of the aryl-bis-sulphone, at 600-1000 C., or of the diaryl sulphone at 400-700 C. Substituted p-xylylene polymers are best prepared from dimers obtained by halogenation, alkylation &c. of cyclo-dimeric p-xylylene. Copolymers may be prepared by the simultaneous pyrolysis of two or more starting materials but the substrate must be held at a temperature low enough to permit condensation and polymerization of all components; selective homopolymer production may be obtained by suitably raising the substrate temperature.
Patent GB-1023712-A (GB)
Title: Novel substituted-2-benzothiazole monoazo dyestuffs
IPC: B44C1/17
Filed: 1964-02-26
Abstract: The invention comprises water-insoluble monoazo dyes of formula <FORM:1023712/C4-C5/1> wherein X is a C1-C6 alkoxy group other than ethoxy, a nitro group or a halogen atom.  The dyes are prepared by coupling a diazotized 2-amino - 6 - substituted - benzo - thiazole with 2-naphthol and are used to dye polyolefin materials containing Werner complex forming metals in blue shades by the process described in Specification 992,561.
Patent GB-1445235-A (GB)
Title: Bonding of solid lignocellulosic material
IPC: C08L97/02
Filed: 1974-02-22
Abstract: 1445235 Plywood CHEMOTHERN BONDING Inc 24 Jan 1975 [22 Feb 1974 8 May 1974] 8086/74 and 20228/74 Heading B5L [Also in Division C3] Wood is bonded together by means of an adhesive produced by heating lignocellulose, a phenol and an acid able to hydrolyse polysaccharides. In examples the adhesive is made by reacting powders from Douglas fir and Gaboon wood with sulphuric acid, phenol and water. In Example III, a 3-ply plywood of Douglas fir is made by hot pressing the adhesive coated veneers. In Examples IV and V the adhesive mixed with Douglas fir shavings and Gaboon wood particles is hot pressed to give particle boards. In some cases the lignocellulose may be left out of the adhesive and the acid and phenol coated on to the wood to be glued. Heating then gives an adhesive layer, as the wood lignocellulose reacts.
Patent GB-1066608-A (GB)
Title: Improvements in or relating to optical modulators
Inventor: DORE MARCUS JOHN
IPC: G02F1/03
Filed: 1965-02-25
Abstract: 1,066,608. Automatic control of optical modulators. MINISTER OF AVIATION. Jan.31, 1966 [Feb.25, 1965], No.8130/65. Heading G3R. Deviations of the dielectric constant of a crystal of material, e.g. potassium di-deuterium phosphate, having electrically controllable optical properties for optical modulation, are corrected by utilizing the deviations to control the temperature of the crystal and thus maintain it at a value at which modulation is most effective. As described, the crystal, or another crystal in thermal association with it, forms the dielectric of a capacitor arranged in an A. C. bridge circuit the output of which controls, through a phasesense sensitive rectifier, the energization of a thermo-electric device cooling the crystal. Electrical signals applied through filter circuits to the capacitor electrodes, or directly to electrodes associated with a separate modulator crystal, alter the polarization of light passed through the modulator crystal from a laser source to a polarization filter the output of which thus varies in magnitude in correspondence with the modulating signals.
Patent GB-766522-A (GB)
Title: Improvements in rotary kilns, drums or the like
IPC: F27B7/32
Filed: 1955-03-21
Abstract: 766,522. Charging rotary furnaces. SMIDTH & CO., AKTIESELSKAB, F. L. March 21, 1955 [March 20, 1954], No. 8170/55. Class 51 (2). In a rotary drum, e.g. a rotary kiln, having a scoop which lies partly outside and partly inside the drum wall and picks up material and delivers it into the interior of the drum during the rotation thereof, outside the drum the scoop 2, comprising side plates 3 and a bottom plate 4, is spanned by three partitions 16, 17 and 18 which are triangular in cross-section having their apices at their inner ends and which also have their outer ends staggered radially, the outer end of the leading partition 16 lying at the smallest distance from the axis of the kiln. Each partition is formed with teeth 19 and their leading faces make successively increasing angles with the drum radii to their inner edges. A wedge-shaped baffle 7 restricts the amount of material picked up by the leading partition 16. Inside the drum, the scoop is box-shaped, having a top plate 11 bent at 12, a bottom plate 13 forming an extension of the plate 4, and a partition 15. The side plates 3 are inclined towards one another, so that the cross-section of the outer part of the scoop is trapezoidal with the longer of the parallel sides lying along the drum wall.
Patent GB-1248223-A (GB)
Title: Radio frequency communication systems
Inventor: MARTIN DAVID JAMES REGINALD
IPC: H04B5/00
Filed: 1968-02-20
Abstract: 1,248,223. Radio signalling. COAL INDUSTRY (PATENTS) Ltd. 16 May, 1969 [20 Feb., 1968 (3)], Nos. 8224/68, 8225/68 and 8226/68. Heading H4L. The system disclosed in Specification 1,248,222 is modified in that the speech signals are transmitted along the line by amplitude modulation in both directions or by amplitude modulation in one direction and at speech frequency in the other direction.
Patent GB-180121-A (GB)
Title: Improvements in gate-valves
IPC: F16K3/18
Filed: 1921-03-17
Abstract: 180,121. Dewrance, Sir J. March 17, 1921. Wedging or jamming.-In a valve of the sliding gate type, the two discs are forced against their seatings by means of a forked or Y-shaped member with wedge-shaped faces. The valve discs d are each provided with lugs b, b<1> forming a cage for the Y-shaped member a. Inclined faces a<2> are formed on this member which, when the stem abuts against the stop e, force the discs d outwards against the valve seats. The discs are maintained in sliding contact with their seats during vertical movement by means of a spring f. Fig. 4 shows an alternative construction in which the spring f has its axis at right-angles to the plane of the Y.
Patent GB-868446-A (GB)
Title: Excavator shovel
IPC: E02F3/407
Filed: 1960-03-10
Abstract: 868,446. Shovelling machines. LIEBHERR, H. March 10, 1960 [March 12,1959], No. 8436/60. Class 68(1). The scoop 10 of an excavator is pivotally mounted on a pin 9 extending through the cross limbs 8 of a T-shaped member 7, 8 having a cylindrical shank 7 secured in a bore of complementary section in a shovel arm 6 by a pin 11. The pin 11 and the shank 7 allow of the shank being secured in the arm 6 in one of two positions spaced at 180 degrees to one another. This allows of conversion of the excavator from a face shovel excavator to a drag shovel excavator and vice-versa as required on removal of the pin 11 and on rotation of the scoop assembly through 180 degrees about the axis of the shank 7. Suitably positioned lugs on the scoop allow of the scoop being connected to the various actuating members of the excavator as required by the particular usage of the excavator.
Patent GB-1404074-A (GB)
Title: Tangs for hand tools
IPC: B21D11/10
Filed: 1973-02-21
Abstract: 1404074 Making hand tools; corrugating I BRETHERICK 17 Jan 1974 [21 Feb 1973] 8488/73 Headings B3A and B3E [Also in Division B4] A method of making a tang 46 for connecting a blade portion 54 of a hand tool, e.g. a trowel 52, to a handle 56 comprises forming a plurality of tangs from a single continuous length of steel bar 10 and separating the bar into individual tangs by cutting-off operations, each cutting-off operation forming a pointed rear end 48 of a first tang and simultaneously forming a plane surface on a front end 44 of a second tang adjacent to the first tang. The bar 10 is pushed through a hole 12 in a die block 14 and its end is aligned with an edge 30 of the block. An hydraulic cylinder 34 is actuated and a pistonrod 32 pivots a die block 18 to bend the bar into a Z-shape. The die block 18 is withdrawn, the bent bar advanced until it abuts a stop 40 and the bending process is repeated. The stop 40 is adjustable and the die blocks are of high carbon steel or mild steel with case hardened working surfaces. The bent bar 10 is divided into individual tangs 42 by cutting the bar diagonally along lines (50), Fig. 2 (not shown), by milling, sawing or the like. The end 44 of the tang is welded or brazed to the blade 54 and a wooden handle 56 is driven on to the end portion 48.
Patent GB-145889-A (GB)
Title: Improvements in the spring suspension of vehicles
IPC: B62K27/06
Filed: 1919-04-04
Abstract: 145,889. Moore, W. W. April 4, 1919. Springs, arrangement of. - A compression spring D is mounted directly between a bracket G on the sprung part and the top of a link C connecting the sprung and unsprung parts of a vehicle, one or both ends of the spring being adjustable to vary the leverage. The attachment E may slide on the link C and be bolted thereto in the desired position, and the bolt F may be fitted in one of a number of holes in the bracket G. The link C is preferably flat, and may be laminated or of springy material. The application of the invention to a motor-cycle side-car is shown.
Patent GB-543292-A (GB)
Title: Improvements in or relating to the stabilization of oils
Filed: 1940-05-15
Abstract: 543,292. Stabilisation of oils. DU PONT DE NEMOURS & CO., E. I. May 15, 1940, No. 8694. Convention date, May 19, 1939. [Class 91] [Also in Group IV] The darkening in colour of viscous petroleum oils is prevented by the addition of a Schiff's base prepared by condensing an aliphatic polyamine with an aldehyde in such proportions that no more than one aldehyde group is available for each primary amino group. The aliphatic polyamines contain at least two primary amino groups directly attached to different carbon atoms of the same open chain, which chain may contain other elements such as nitrogen, oxygen and sulphur ; e.g. ethylenediamine, 1:2- and 1: 3-propylenediamines, hexa- and deca-methylenediamines, diethylenetriamine, triethylenetetramine, di- #-aminoethylether and di- #-aminoethylsulphide. The aldehyde may be aliphatic or aromatic and if substituted, contain only alkoxy, alkyl or aryl radicles; examples given are benzaldehyde and its 2- methyl, - 3-methyl, 4-methyl, 4-phenyl, 2- methoxy and 4-methoxy derivatives, a- and #-naphthaldehydes. propionaldehyde, n-butyraldehyde and heptaldehyde. The amount of base added is preferably from 0.01 to 0.1 per cent. The oils treated may be heavy fuel oils, lubricating oils, oils used in heat-transfer apparatus and electrical transformers, and greases. Tables are given showing the colour inhibiting effect on an oil of dibenzalethylenediamine in varying concentrations and also of'the effect of dibenzal-hexamethylenediamine, dibenzal-diethylenetriamine, dibenzaltriethylenetetramine, dipropional-ethylenediamine, di-(n-butyral)- ethylenediamine, (di-(nbutyral)-hexamethylenediamine, di-(p-tolual)- propylenediamine and di-(p-anisal)-propylenediamine. Specification 523,451 is referred to. The Specification as open to inspection under Sect. 91 also describes the use of polvamines containing cyclic substituents, e.g. 1:2-diaminocyclohexane, and of both polyamines and aldehydes containing aryloxy, halogen, heterocyclic, amino, nitro, cyano and carboxyl groups. Moreover as aldehydes, pyridine and quinoline aldehydes are included. Other specific polyamines and aldehydes mentioned are pentaerythrityltetramine and aldol. This subject-matter does not appear in the Specification as accepted.
Patent GB-468981-A (GB)
Title: Improvements in or relating to portable electric battery lamps
IPC: F21L4/00
Filed: 1936-03-24
Abstract: 468,981. Electric - battery lamps. DOWNS, J. March 24, 1936, No. 8755. [Class 39 (ii)] A portable electric-battery-lamp comprises a non-circular casing closed at one end for containing a battery, a cover of the same shape as the casing for fitting upon or over the rim at the open end of the casing, a clamping- member adapted when in its operative position to extend across the open end of the casing and under inward projections such as lips on the casing, and means engaging the clamping-member and cover and adapted to be operated from outside the cover to draw the latter firmly against the rim of the casing. In the example the lamp casing 1 of cast aluminium is formed with outward bulges 3 providing internal recesses 4 and inwardly extending lips 5 which co-operate with a clamping member 14 provided with projections 15 to engage under the lips 5. A central hole in the member 14 is screw-threaded to receive a screw-threaded stem 8 at the lower end of a cup-shaped carrier 9, which contains a lamp holder 10 and a parabolic reflector 11, a central aperture for the stem 8 being provided in the cover 6, so that the carrier 9 bears on the cover. The operation of screwing the stem 8 into the member 14 causes the latter to rotate until arrested by projections 15 at its ends engaging the walls of the recesses 4, whereupon continued rotation of the stem causes the lips 5 to be gripped tightly between the cover 6 and member 14 and provides a flame-proof engagement between cover and casing. A gasket 17 may be interposed to make the joint gas-tight or water-tight. The member 14 is screwed down to the bottom of the stem 8 before the cover is placed on the casing, and aligned substantially longitudinally of the greatest width of the casing. A pin 18, projecting downwardly from the cover prevents counter-clockwise rotation of the member 14 by engagement with one of two stop-faces 19 on the projections 15, and prevents inadvertent release of the cover. Unauthorized turning 'of the stem is prevented by providing upon the carrier 9 a screwthreaded bezel-ring 12 which is serrated around its periphery to engage the end of a catch 21 pivoted between brackets 23 on the cover, holes being provided in the catch and brackets to receive a lead-sealed wire 25 or other means for holding the catch in the locked position. The switch operating means comprise two balls 29, 32 separated from a contact spring 33 by a resilient rubber cup or diaphragm 31 and adapted to be depressed by a slidable thumb-piece 26 with a cam-face 28 on its under surface. A detent pin 39 is provided on the thumb-piece to engage serrations 40 in the carrier 9 to hold the latter temporarily against rotation when the bezelring 12 is being unscrewed.
Patent GB-375296-A (GB)
Title: Improvements in or relating to indicators or calculators
IPC: A63B71/06
Filed: 1931-03-21
Abstract: 375,296. Indicators for displaying variable information. ROLPH, W. M., 1, Dover Street, London. March 21, 1931, No. 8756. [Class 118 (i).] A device for predicting the next number to turn up at roulette or other games comprises a pair of arms 4, 5 separately and together movable about the centre of a disc 1 marked similarly to the roulette table. One arm may be formed as a pointer and the other with a reading aperture. The two last numbers turned up having been noted, the pointers are set to these respectively and are then rotated as one to bring pointer 5 over the last number and thus cause pointer 4 to indicate the probable next number. The pointers may be duplicated on the other face of the disc, provided with a replica of another game board, and a single strip bent into U-shape may serve as a pointer on both faces. Specifications 134,558, 136,179, and 136,182, [all in Class 106 (i), Calculating &c.], are referred to.
Patent GB-125394-A (GB)
Title: Improved Machine for Spinning, Washing and Drying Viscose Threads.
Inventor: DENIS MAURICE
IPC: D01D5/06
Filed: 1919-04-08
Abstract: 125,394. Denis. M. Aug. 8, 1913, [Convention date]. Apparatus for making filaments.-In making viscose threads, the squirting-nozzle 14 is connected to a conduit 1 for supplying viscose solution, through a branched pipe, each branch of which is fitted with a filter, so that one filter may by cleaned while the other is in use. The filters consist of a box 3 having a filtering disk held by a screwed ring 30, and closed by a plug 29 with a central pointed screw 31 to allow air to escape when bringing the filter into use. The coagulating- bath 15 is supplied continuously with liquid from a conduit 18 through nozzle 19 and pipe 21, and liquid overflows into a pipe 16 and passes into a flexible pipe 22 and conduit 23 from which it is returned after being purified and regenerated to the conduit 18. The coagulating-bath is adapted to be lowered to vary the length of the path of the filaments and also to enable the filaments issuing from the nozzle 14 to be attached by hand to a hook 38 on a moving endless metal web 40 which carries the thread beneath nozzles 42 which spray a coagulating-liquid and nozzles 44 which spray a washing-liquid. The thread is detached by a jet from a nozzle 45 and is carried round a second web 48 over a perforated casing 49, through which hot air is drawn bv a fan 52. The dried thread is wound on a bobbin 55. Coagulating-liquid from the nozzles 42 is collected by a trough device 43. Vapours are drawn away from the apparatus by a pipe 28 through a perforated plate 27.
Patent GB-1255583-A (GB)
Title: Improvements in or relating to fluid containers
IPC: B43L25/02
Filed: 1970-02-24
Abstract: 1,255,583. Compartmented containers. RAINBOW CRAFTS Inc. 24 Feb., 1970 [28 Feb., 1969], No. 8888/70. Heading B8D. [Also in Divison B6] An ink well or paint holder comprises outer and inner walls 12 and 16 defining an outer fluid reservoir chamber A and an inner dispensing chamber B, and a bottom wall 18 consisting of a flexible diaphragm portion 40 and a central portion 42 which projects into the chamber B and is provided with an inclined surface or surfaces 48 co-operating with a correspondingly bevelled edge 34 of the inner side wall to prevent fluid flow from chamber A to chamber B until the bottom wall is flexed away from the inner side wall by a paint brush or other implement. The central portion may be of general frustoconical or pyramidal shape and dished at 50. Alternatively, Fig. 6 (not shown), the central portion is cone shaped. An annular lip or flange 30 projects downwardly into the chamber B and defines a narrow annulus 32 which prevents any spillage of fluid in chamber B should the container be knocked over. To avoid inadvertent separation of the bottom wall from the inner side wall during storage or transport, the bottom edge of the inner wall may be temporarily secured to the bottom wall central portion at spaced peripheral points 36a by sonic welding, these welds being broken by depression of the bottom wall on initial use.
Patent GB-319673-A (GB)
Title: Improvements in or relating to the treatment of crude oils, tars, bituminous residues and the like
IPC: C10C3/02
Filed: 1928-03-23
Abstract: 319,673. Bolgar, L. March 23, 1928. Pitch and tar.-In the preparation of an artificial asphalt from crude mineral oils, tars, and bituminous materials, the tar &c. is mixed with oxidizing agents such as acids or acidcontaining substances, e.g. acid sludges, heated to over 100‹ C., and preferably to 120-200‹ C., and allowed to rest until a precipitate is formed; this is separated from the liquid and heated until the acids are decomposed. 1-25 per cent by volume of preferably diluted sulphuric acid or an equivalent amount of sludges may be used and mixed, e.g. at 80" C. with the material; or solutions of compounds containing the radicles SO4, NO3, NO2 may be employed. Acid sludges which contain both bituminous material and acid may be heated alone to 150-160‹ C. after addition of water to effect the precipitation. Separation of the precipitate as by decantation or filtration may be facilitated by substances decreasing the viscosity of the material, such as petroleum distillates or residues. A further quantity of bituminous material may be added to the solid components to obtain additional precipitate without further acid being added. The liquid component may be treated by usual methods for the production of oils. Heating of the precipitate at about 200-300‹ C., preferably after the addition of 10-20 per cent of fluxating agent, e.g. Mexican flux oils, anthracene oils, &c., converts it into a bitumen practically free from paraffin and soluble in carbon disulphide which may be subjected to acid treatment, sulphurizing, &c. It may be incorporated with tar or pitch to make road tar or with coal pitch in suitable amount to form an ebonite substitute, or mixed with filling materials such as sand, stone meal, steatite meal, fibrous substances or mixtures. Reference has been directed by the Comptroller to Specifications 240,803 and 259,442, [both in Class 91, Oils &c.].
Patent GB-1378993-A (GB)
Title: Heterocyclic carbamates
IPC: C07D213/30
Filed: 1973-02-23
Abstract: 1378993 3-Pyridylmethyl carbamates ROHM & HAAS CO 23 Feb 1973 [15 March 1972 19 April 1972 18 Oct 1972] 8943/73 Heading C2C [Also in Division A5] Novel rodenticidal compounds (I) where X is NO 2 , CN, CF 3 , SR, SOR, SO 2 R or SO 2 NH 2  and R is C 1-6  alkyl, are made by interacting 3-pyridylcarbinol and the corresponding 4-X-substituted phenyl isocyanate. The following compounds are also prepared, 1 - p - tolylsulphonyl - 3 - p - cyanophenyl - urea, propyl - p - nitrophenyl - sulphide and - sulphone: propyl - p - aminophenyl - sulphone, p - sulphamoyl - phenyl carbonyl azide and bis - p - sulphamoyl-phenylurea.