baber/WOPTO huggingface dataset:
Patent GB-566981-A (GB)
Title: An improved screw thread or like gauge
IPC: G01B3/40
Filed: 1943-04-12
Abstract: 566,981. Screwthread &c. gauges. WILLIAMS, A. H. April 12, 1943, No. 5796. [Class 106 (ii)] In a screw-thread &c. gauge of the type comprising opposed gauging members shaped at their gauging faces to the required profile, the gauging members consist of parallel, cylindrical pins with shaped ends and of a diameter equal to the pitch or a multiple thereof, or to a fraction in which tease spacing pins are inserted between them. The pins 11 are clamped in rows in the jaws 10a, 10b, within slots 13 and' with or without distance pieces 12, by means of flanged clamping pieces 14 held by screws 15, the pins being located endwise by adjustment plates 16 secured to the clamping pieces by screws 17.
Patent GB-686532-A (GB)
Title: Improvements in devices for converting alternating-current signals into corresponding direct current signals and for re-converting the latter into alternating-current signals of a desired frequency
IPC: H03F9/02
Filed: 1949-03-03
Abstract: 686,532. Automatic control systems. BENDIX AVIATION CORPORATION. March 3, 1949 [June 28, 1948], No. 5870/49. Class 38 (iv). In a system for deriving an A.C. signal of a desired frequency from an A.C. signal of a different frequency, e.g. a signal from an automatic pilot, the latter signal, produced by a source 27, is fed into push-pull connected discharge devices 23, 23<SP>1</SP> to produce D.C. output across the leads 37, 38, the magnitude and polarity of which are correlated with the amplitude and phase of the A.C. signal; the D.C. output is then fed to balanced saturable core reactors 40, 41 supplied from a source 80 of the desired frequency so as to produce an A.C. signal of that frequency, the magnitude and phase of which is related to the original signal. Several systems of the character shown may be arranged so that a single correlated A.C. signal of desired frequency can be derived from a plurality of originating signals of different magnitudes, phases and frequencies, e.g. signals representing displacement, rate of displacement, &c. Specification 647,961, [Group XXXIX], is referred to.
Patent GB-976736-A (GB)
Title: Process for producing naphthalene
Inventor: JOHNSON HERBERT LESLIE
IPC: C07C5/27
Filed: 1963-02-13
Abstract: Naphthalene is obtained from an aromatic hydrocarbon feedstock containing a mixture of alkyl naphthalenes by subjection to a partial hydrodealkylation under conditions including a temperature of 1000-1500 DEG  F. such that alpha-alkyl groups are removed faster than beta-alkyl groups, distilling to recover naphthalene product and an alkyl naphthalene fraction which is isomerized to increase the content of alpha-alkyl derivatives and recycled to the dealkylation step.  The feed preferably boils in the range 400-550 DEG  F. and is preferably pretreated as described in Specification 974,282 to crack non - aromatic hydrocarbons and desulphurize by contact with cobalt molybdate or molybdenum disulphide on alumina at 800-980 DEG  F., 150-100 p.s.i.g., 3-25 : 1 hydrogen to hydrocarbon mol. ratio, 0.5-10 vol./vol./hr.  A 400 DEG  F. + fraction is separated and thermally dealkylated at 150-1000 p.s.i.g., 3-25 : 1 hydrogen to hydrocarbon mol. ratio and a residence time of 2-300 seconds, or catalytically using a similar catalyst to that in the first step at 1000-1200 DEG F. and 0.2-5 vol./vol./hr.  After recovering naphthalene the 450 DEG F + fraction is isomerized in the presence of silica-alumina, silica-magnesia, silica-zirconia or acid activated clay at 572-932 DEG  F. and 0.1-20 vol./vol./hr. in the presence of an inert diluent to maintain a hydrocarbon partial pressure of 0.75-7.35 p.s.i.g., e.g. nitrogen, hydrogen, methane, propane or butane. Alternatively, isomerization is effected with HF-BF3 at 32-86 DEG F. for several hours, preferably in a solvent such as heptane or benzene.
Patent GB-377913-A (GB)
Title: Improvements in and relating to frequency changing systems
IPC: H02M5/447
Filed: 1932-02-27
Abstract: 377,913. Frequency changing ; converting. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Stone, C. W.; Box 985, Schenectady, New York, U.S.A.) Feb. 27, 1932, No. 5911. Convention date, Feb. 28, 1931. '[Class 38 (ii).] An arrangement for transmitting power from a circuit 10 operating at one frequency to a circuit 11 operating at another frequency comprises a grid-regulated valve rectifier 13, 14 feeding a grid-controlled valve inverter 24, 25, the grid potentials of which are derived from the circuit 11. Control of the power transmitted is effected by varying the phase of the grid potentials of the rectifier valves 13, 14 as by a rotary phase shifter 17. Current limiting resistances 16, 27 are provided in the grid circuits, and a smoothing reactor 22 is provided in the D.C. circuit 21.
Patent GB-237520-A (GB)
Title: Improvements in dolls' heads
IPC: A63H9/00
Filed: 1924-12-29
Abstract: 237,520. Chad Valley Co., Ltd., and Johnson, A. J. Dec. 29, 1924. Dolls. - In dolls' heads made of felt or textile fabric in which glass &c. eyes are inserted in openings from within, the eyes 4 are held in position by one or more strips of adhesive tape or plaster. Specification 22691/97 is referred to.
Patent GB-678031-A (GB)
Title: Improvements in or relating to footwear
IPC: A43C13/14
Filed: 1950-03-09
Abstract: 678,031. Protecting toe-caps for footwear. BRYNMAWR BOOT MAKERS, Ltd., and ROBINSON, A. P. March 16, 1951 [March 9, 1950], No. 5914/50. Class 17 (iii). A metal protecting toe cap A for a boot or shoe has a tie member B of lighter gauge metal through which screw &c. fastenings J which secure the inner and outer soles F, H, I may pass. The tie may extend the full length of the cap or part only and may have lightening holes.
Patent GB-728989-A (GB)
Title: Separation of trans, trans pentaenals from impure mixtures and products obtained thereby
Filed: 1953-03-04
Abstract: The invention comprises a crystallizable complex of hydroquinone with a 2,6-trans, trans pentaene aldehyde having the formula <FORM:0728989/IV (b)/1> or <FORM:0728989/IV (b)/2> and the method of separating a 2,6-trans, trans pentaenal having the vitamin A aldehyde carbon skeleton from a mixture containing same by mixing said mixture with hydroquinone, thereby forming a hydroquinone complex with said pentaenal, and separating said complex from said mixture.  The separation of the complex can be effected by standard procedures such as solvent partition or by crystallization.
Patent GB-564629-A (GB)
Title: Improved method of and means for use in the shaping of shovels and like implements
IPC: B21D53/66
Filed: 1943-04-15
Abstract: 564,629. Stamping sheet metal shovels. JEPSEN, C. H. R. April 15, 1943, No. 6065. [Classes 83 (ii) and 83 (iv)] Die sets for use in stamping shovels from sheet blanks have a mandrel for forming the handle socket aligned with the shaping dies and means for actuating transversely movable dies to complete the formation of the handle round the mandrel. The lower die comprises a section 6, Fig. 2, grooved at 7 to form the handle, and a rear section 9, Fig. 1, to form the blade. Transversely movable dies 15, 16 are guided on the section 6, carry stops 48 for locating the blank 47, and are actuated by arms 17 on rock-shafts 18. having adjustable plates 20 that contact abutments 23a on the dies. Other arms 24 on the rock-shafts are engaged by projections 26 on the presshead 2 to swing the shafts. Tension springs 28 return the dies. The mandrel 3, Fig. 3, is carried by a swinging and vertically movable pillar guided in a sleeve 5 and supported by a spring 33. A handle 36 carried by a collar 32 on the pillar has a pin 37 that enters a hole in a plate 39 fixed to the presshead to maintain the mandrel 3 in line with the handle-forming part 12 of the upper die 10 during the descent of the presshead. After the socket portion has been closed round the mandrel a pawl 41 engages a pin 40 on the collar 32 to prevent the ascent of the mandrel with the presshead and cause disengagement of the pin 37 from the hole. The mandrel is now swung by the handle 36 to carry the finished shovel to a convenient position for removal, the pin 37 riding on the undersurface of the plate 39. After removal the mandrel is swung back to normal position when the pin re-enters the hole and the spring 33 returns the parts to their initial position.
Patent GB-192945-A (GB)
Title: A hymnal indicator
IPC: G09F7/02
Filed: 1922-03-02
Abstract: 192,945. Davies, T. J. March 2, 1922. Displaying announcements and information.-An indicator for displaying the number of a selected hymn is shown in front and back vie in Figs. 1 and 2 respectively. The number plates are mounted upon three or more slides r, Fig. 4, which are separately raised by hand until the des.red number shows through the front aperture k. Fig. 1. The slides r are mounted on guide rods p, and are each fitted with a lifting-handle. They are held in the desired position by a strong catch engaging notches cut in the front board of the casing.
Patent GB-306844-A (GB)
Title: Process for the manufacture of azo dyestuffs on the fibre
IPC: D06P1/12
Filed: 1929-02-25
Abstract: 306,844. I. G. Farbenindustrie Akt.- Ges. Feb. 25, 1928, [Convention date]. Stable diazo compounds. - The condensation products of diazo or tetrazo compounds with secondary bases containing no sulphonic, carboxylic or ethereal sulphite groups such as piperidine or dimethyl- or diethylamine are used for producing azo dyestuffs on the fibre. The free diazo solution is obtained. from the stable condensation product by treatment with acid. According to examples cotton impregnated with 2 : 3-hydroxynaphthoic acid-a-naphthalide by the usual process is developed with the piperidine compound of diazotized m-nitro-o-toluidine which has been treated with hydrochloric acid and a solubilizing agent or with the piperidine compound of tetrazotized dianisidines similarly treated.
Patent GB-577801-A (GB)
Title: Improvements in and relating to voltage responsive thermionic valve circuit arrangements
IPC: H03F3/36
Filed: 1943-04-16
Abstract: 577,801. Valve amplifying circuits. MORRIS, D. G. O., and METROPOLITANVICKERS ELECTRICAL CO., Ltd. April 16, 1943, No. 6158. [Class 40 (v)] [Also in Group XXXVI] A circuit arrangement adapted to provide an output quantity which is dependent in magnitude and sense on the difference between two input voltages comprises a pair of thermionic valves having separate anode resistors and a common cathode resistor and associated with circuit elements across the anode /cathode of one of the valves to form a potential dividing circuit such that the voltage across the potentiometer is so resolved at the intermediate point that the potential remains constant with corresponding variation in the anode currents of both valves but varies with the difference between the anode currents. The Figure shows an arrangement in which input voltages V 1, V 2 are applied through current limiting resistances 1, 2 to the grids of triodes T1, T2, these are associated with the anode resistances 5 and 6 and a common cathode resistance 12 and potentiometers 17, 18, 19, 20 so that voltages applied between the grids produce potentials between the points 21, 22. A potentiometer 10 between the cathodes is provided initially to adjust the valves so that to equalize the slopes of the operative parts of the anode current grid voltage characteristics. A resistor 16 in the cathode heating circuit is provided so that when the slopes have been equalized the currents may be equalized. The output voltages are preferably amplified by the valves A1, A2 and may be applied to a moving coil instrument F to provide a deflection showing the difference and the sense of the voltages V1, V2.
Patent GB-124223-A (GB)
Title: Improvements in and relating to Trays or Drip Pans Serving as Stands and Drip Catchers for Oil Stoves.
IPC: F24C15/14
Filed: 1919-03-12
Abstract: 124,223. Cleveland Metal Products Co,. (Assignees of Chadwick, L S.). March 11, 1918, [Convention date]. Supports for stove bodies.-A " fender " or drip pan for supporting, and catching oil droppings from portable oil stoves, consists of a square plate 10 of metal with sides 11, 14, the upper edges of which have inwardly-turned and folded stiffening flanges 12, 15. The sides 14, which are opposite one another, have at their ends lugs 16 which are bent round the edges of the sides 11, and are secured by rivets or the like. The legs 3 of the stove are sprung into the corners of the pan, which is thus secured to the stove. In a modification, Fig. 7, the corners 22 of the plate are crimped as shown, and turned against the sides 21 of the pan. The upper parts 23 of the sides are then folded down along the lines a, and secure the crimping. The sides 21 are inwardly inclined, and overhang the ends of the legs of the stove.
Patent GB-140065-A (GB)
Title: Improvements in or relating to dry batteries
IPC: H01M6/44
Filed: 1920-03-01
Abstract: 140,065. Burgess Battery Co., (Assignees of Schulte, W. B.). March 13, 1919. [Convention date]. Cases.-A dry battery comprises a munber of cells 1 located in separate compartments in an outer casing 10 as shown in plan in Fig. 2. The compartments are formed by interlocking pasteboard strips 7, 8 impregnated with paraffin and extending from the bottom of the outer casing to within a short distance from the top, as shown in Fig. 3. The space above the cells and strips 7, 8 is filled with pitch 18 which penetrates into the compartments and holds the cells in position. Each cell is wrapped in waxed paper which is folded over the bottom of the cell and serves to separate the cell from the bottom of the casing and the sides of the compartment. The casing is made of pasteboard impregnated with paraffin. Terminal wires from the zinc and carbon electrodes of the end cells pass through the seal 18 to the exterior of the battery.
Patent GB-277040-A (GB)
Title: Improvements relating to roof trusses
IPC: E04B1/26
Filed: 1926-03-06
Abstract: 277,040. Wild, J. March 6, 1926. Roofs.-A roof purlin 4 and a principal rafter 5 are arranged to engage each other by providing the upper face of the purlin with a notch 10 to fit a corresponding notch in the lower face of the rafter. A tenon joint 12, 13 is arranged between the purlin 4 and a strut. Angle cleats 14 may be arranged in the angles formed by the rafter, purlin, and strut. such cleats being secured, if desired, to all three members. Specifications 151,392 and 237,662 are referred to.
Patent GB-630906-A (GB)
Title: Improvements in rodent traps
IPC: A01M23/30
Filed: 1947-10-07
Abstract: 630,906. Animal traps. BRIGHT, C. C. Oct. 7; 1947, No. 6308. [Class 5 (i)] An electromagnetically operated trap of the throw-over type comprises a latching device for holding a spring loop 2 in the set position, an electromagnetic device for releasing the latch. and contacts 5 in the electromagnetic circuit adapted to be closed by an animal. The latch comprises a pivoted cam 15 having notches 16 and 17. The notch 17 receives the-spring loop 2 when the notch 16 is in engagement with a detent 13 on a pivoted trigger 12, which is in turn engaged by a pivoted armature 9 adapted to be attracted towards the core 8 of a solenoid 7 upon the closure of an electric circuit. The circuit includes a battery 18, the solenoid 7 and a pivoted metal plate 3 carrying contacts 5 which are open except when the plate is depressed by an animal. The circuit also includes. spring contacts 22, 23, which are closed when the trap is set but are opened when the spring loop 2 flies back. The base of the trap is of moulded material.
Patent GB-1134632-A (GB)
Title: Improvements in or relating to the production of printed circuits
Inventor: SHEPHERD DAVID CHARLES
IPC: H05K3/00
Filed: 1965-02-13
Abstract: 1,134,632. Printed circuits. ELLIOTT BROS. (LONDON) Ltd. 10 Feb., 1966 [13 Feb., 1965], No. 6330/65. Heading H1R. In a printed circuit arrangement, holes in or through an insulating substrate are formed by chemical etching of the substrate material. The substrate may comprise a polyimide film or sheet, and may be etched by alternate treatment at at least 80‹ C. with cone. H 2 SO 4  and NaOH; alternatively the substrate may be of glass fibre impregnated with epoxy resin or a polyester. The invention is described with reference to printed circuits formed from double-sided Cuclad laminates, although Ni, "Kovar" (Registered Trade Mark), or stainless steel may replace Cu. Holes are etched in the Cu cladding on one or both sides of the laminate at the sites of the substrate holes; the desired circuit pattern is photo-deposited in negative form on the cladding in a plating resist material; the exposed areas of the Cu are electroplated with an etchant resist, e.g. Au; the plating resist is removed and the substrate holes etched out; finally, the exposed Cu is removed by etching. If the Cucladding is bonded to the substrate by a resin adhesive, this is removed with an aqueous solution of chromic trioxide and acetic acid. In an alternative embodiment, the plating step is omitted, the circuit pattern being photo-printed in positive form in an etchant-resist material on the Cu, followed by etching. Single- and double-sided circuits may be formed. The formation of holes with overhanging conductors is described; when electroplating is employed the plated layer may be thickened so that the underlying Cu of the overhanging portions may be removed in the etching step; otherwise, the underside of the overhanging portion is protected by an etchant resist. Use may be made of the lateral etching tendency of the substrate etchant to produce overhanging conductors. Holes in multilayer printed circuit assemblies may be formed by the method of the invention.
Patent GB-629150-A (GB)
Title: Improvements in or relating to electric signal generators
IPC: G08C19/16
Filed: 1942-08-19
Abstract: 629,150. Electric transformers. SPERRY CORPORATION. Aug. 19, 1942, No. 6331/48. Convention date, Aug. 19, 1941. Divided out of 629,104. [Class 38 (ii)] [Also in Group XXXVIII] A transformer, having variable coupling and intended primarily for a remote control system, has a movable armature, so shaped in relation to the pole-pieces that a graduated A.C. output is obtained through large angles of displacement from the central position, and in a sense dependent on the direction of movement from that position. A three-limbed core 1 carries a winding on its centre limb 4 supplied with A.C. and windings on its outer limbs 5, 6 connected in opposition to output leads 7, 7<1>. Two arcuate armatures 8, 9 of graduated width are mounted on a non-magnetic support 10 pivoted at 11 and are arranged to come between poles 4, 6 and 4, 5 respectively, when rotated. In the neutral position shown, voltages induced in the output windings are a minimum and are balanced, so that there is no output. The presence of an armature between two poles increases the output from the corresponding side while the opposing output decreases, the resultant output depending on the extent of the movement. Specifications 360,428, 419,995, [Group XXXVIII], and 629,104 are referred to.
Patent GB-1076788-A (GB)
Title: Drawing and/or annealing rolls for sheet glass making apparatus
IPC: C03B13/16
Filed: 1966-02-14
Abstract: <PICT:1076788/C1/1> <PICT:1076788/C1/2> A drawing or annealing roll for sheet glass making machines comprises an elongate hollow metal shaft 10, with a glass contacting surface 12 surrounding and supported on the shaft 10, having a deflector member 14 centrally mounted in the shaft having an outer surface which, with the inner surface of the shaft, defines an annular interval which is narrowest at the centre of the roll and increases longitudinally on opposite sides of the roll centre to points spaced substantially equally inwardly from the opposite ends of the roll.  The deflector member 14 is positioned by sleeves 18 at each end which are joined to it by vanes 16.  Preferably the sleeves 18 have right and left hand threads machined on the outer surface which contacts the shaft 10 so that only the crests of the threads engage the shaft and a layer of air acts as an insulator.  The deflector may be of metallic or ceramic material. The coolant passing through the shaft 10 is accelerated at the centre portion to assist cooling of the central portion of a glass sheet.  The annular interval downstream of the coolant may increase at a lesser rate than upstream to take account of the increase in temperature of the coolant.
Patent GB-782662-A (GB)
Title: Methods of making semiconductive bodies
IPC: H01L21/223
Filed: 1955-03-04
Abstract: 782,662. Coating by vapour deposition. WESTERN ELECTRIC CO., Inc. March 4, 1955 [March 4, 1954], No. 6454/55. Class 82(2) [Also in Group XXXVI] A body of N type silicon is heated in the presence of a gaseous compound of boron mixed with an inert gas to diffuse elemental boron into a region of the body and convert in to P-type conductivity. The boron compound may consist of halides, hydrides or oxides such as boron tri-chloride, boron tri-fluoride, boron triiodide, diborane, or boron trioxide. Fig. 2 shows an arrangement in which a mixture of one volume of boron trichloride with 100 volumes of helium is caused to flow continuously over N type silicon bodies 21 mounted in ceramic boat 22, in ceramic tube 20, which is heated to a constant temperature between 900‹C. and 1300‹C. The boron diffuses into the silicon to convert the outer surface layer to P type conductivity, the thickness of the layer being determined within fine limits by the duration and temperature of the heating. The temperature may be sufficient to "crack" boron halides, so that elemental boron is deposited on and subsequently diffused into the silicon. In an alternative arrangement, a ceramic tube containing silicon wafers is first flushed with an inert gas. filled with a gas such as boron tri-chloride. and then sealed before the heating process is applied. In a modification, boron triiodide powder is placed in the tube before sealing, so that the gas is produced by the heat employed for the diffusion.  Selected surfaces of the processed wafers may be ground off to remove the P layers and to provide PN or PNP elements, which may be utilized in rectifiers, unipolar or bipolar transistors, surge protectors, photoconductive and photo-voltaic devices The diffusion process may be repeated, but using phosphorus in place of the boron compound and heating for say 6 hours at 1100‹C.. so that a PN N+ element may be provided, owing to the low resistivity of the boron diffused P-tvpe layer, this layer is not appreciably affected by the subsequent phosphorus diffusion. Before being subjected to the process, the silicon wafers may be polished with silicon carbide abrasive and etched with nitric and hydrofluoric acids. Specfications 734,255, 782,663, 782,664 [all in Group XXXVI] and 782,665 [Group XXXV] are referred to.