baber/WOPTO huggingface dataset:
Patent GB-231661-A (GB)
Title: Improvements in or relating to the grading of powdered material by elutriation or hydraulic classification
IPC: B04C1/00
Filed: 1924-03-25
Abstract: 231,661. Andrews, L. March 25, 1924. Stationary vessel wet-separating apparatus.- Finely ground materials, such as pigments, abrasives, pottery slips, Fullers earth, fillers for asphalt, &c., are graded in a wet condition by subjecting the material to centrifugal action induced by the flowing material within a vortex chamber or channel. Water supplied through a pipe c passes through two ejector nozzles d, e, to a vortex chamber or channel b, material to be treated passing from a hopper x, which may contain a sieve 3, through a pipe y to be taken up by the water. The material is separated by centrifugal force in the vortex channel, the coarser material passing to a collecting chamber h and the finer material passing through an outlet o to a nozzle q laterally connected to a syphon chamber r to set up whirling motion in the latter; further separation occurs in the syphon chamber, fine material then passing through a valve controlled outlet u and trough w to a settling tank while semi-coarse material passes through a nozzle s and pipe t to the main water supply pipe. The coarser material in the chamber h is subjected to further separation by an upward current supplied through a pipe 12, coarse material then falling to form a sand seal at i while fine material rises through a double-conical chamber n, in which further separation is effected, and an adjustable overflow chamber m for delivery through a float chamber 5 to the nozzle q. When the water level in the float chamber 5 reaches a given level, a float 7 opens a switch 8 to de-energize a solenoid 9 and stop the water supply through the pipe c. Water in the float chamber 5 then falls, passing partly to the syphon chamber r and partly into the feed hopper x to prevent settlement in the latter; when the float 7 falls sufficiently, the switch 8 is closed and the water supply recommences. While the water supply is cut off, coarse material falls from the chamber h to a receptacle 11 for discharge through a solenoid-controlled valve 13 to a dished endless belt 24 from which it is discharged subsfantially free from water; the solenoid 14 controlling the valve 13 is itself controlled by a switch, Fig. 2, whereby discharge is permitted only when a substantial amount of material is collected in the chamber 11. The switch comprises pivotally connected members 15, 16 with contacts 19, 21, the member 15 being connected by a rod 18 to the main water supply valve so as to be rocked when the latter is operated; the member 16 is weight or spring loaded and normally rests on a lug 20 on the member 15, but when accumulated material in the chamber 11 prevents movement of a vane 23 connected to the member 16, the members 15, 16 mav have relative movement to close the contacts 19, 21. By means of a valve 2, the pipe y may be placed in communication either with the nozzle s or hopper x or both. Two or more arrangements as shown mav be provided in series, a syphon chamber being provided, however, only with the final arrangement.
Patent GB-723803-A (GB)
Title: Improvements in and relating to pulse generating circuits
Inventor: MELVILLE WILLIAM SIMM
IPC: H02M9/06
Filed: 1952-03-25
Abstract: 723,803. Changing wave shape. BRITISH THOMSON-HOUSTON CO., Ltd. March 17, 1953 [March 25, 1952], No. 7648/52. Class 38 (2). To a circuit for producing a strain of pulses in a substantially resistive load R from an A.C. source G of the kind forming the subject of Specification 715,826 in which an inductor L and capacitor C, resonant at the supply frequency, are connected in series with a saturable capacitor D across the supply, and the load R is connected across capacitor D, the addition is made of a saturable inductor P in series with the load. While the voltage across capacitor D is rising, inductor P is unsaturated and blocks current from load R, but when it reaches its maximum value inductor P saturates and capacitor D discharges through inductor P into load R across which a sharp pulse is developed. The following conditions must be fulfilled: the unsaturated and saturated capacities of D must be respectively much greater and much less than the capacity of C, the unsaturated and saturated inductances of P must respectively be much greater and much less than the inductance of L, P and D must respectively saturate when the voltage across D and the current through L are at the maxima, and the value of R must be suitable. To produce a train of unidirectional pulses the capacitor D may be polarized as described in Specification 718,191, and if necessary inductor P may be polarized as described in Specification 666,575, Fig. 4 (not shown).
Patent GB-476145-A (GB)
Title: Improvements in hats
IPC: A42B7/00
Filed: 1937-03-16
Abstract: 476,145. Hats. RITTENER, (nee COLLINS), A. March 16, 1937, No. 7652. [Class 63] A supple head-covering has a spring 2, similar to a spiral watch spring, connected to the crown of the head-covering over the whole of its length so as to be integral with it, in a substantially median plane and having the effect of rolling the head-covering on itself when it is withdrawn from the head. The ends of the spring engage opposed regions of the head and secure the hat to the head. The spring need not be of ribbon section.
Patent GB-631262-A (GB)
Title: Manufacture of disazo-dyestuffs
IPC: C09B35/08
Filed: 1947-03-20
Abstract: Diazo dyestuffs free from sulphonic acid groups are made by coupling tetrazotized 3 : 31-dihydroxy-benzidine with a hydroxynaphthalene, capable of coupling in a position vicinal to a hydroxyl group, in the presence of pyridine in an amount more than 25 per cent calculated on the weight of the coupling mixture. The dyestuffs are preferably symmetrical, but asymmetrical dyestuffs can be obtained by using 1 mol. each of two different hydroxy-naphthalenes with 1 mol. of tetrazotized dihydroxy-benzidine.  Preferred hydroxynaphthalenes are b -naphthol, various dihydroxynaphthalenes and their mono, alkyl and hydroxy-alkyl ethers, amino-naphthols and hydroxy-naphthalene sulphonamides, particular compounds being specified.  The tetrazotized dihydroxy-benzidine in the form of a filter cake is mixed with the coupling component and pyridine and the necessary alkali (e.g. alkali metal hydroxide or carbonate) run in as a concentrated aqueous solution, after which the coupling mixture is worked up in the usual way.  The products are suitable for dyeing various materials, e.g. linen, cotton, artificial silk and staple fibres of regenerated cellulose.  They may be converted in substance, in the dyebath or on the fibre into complex metal compounds, e.g. of copper, chromium, iron, nickel, cobalt or more than one of these, preferably by the process of Specification 455,274.  The metal compounds can be used for colouring masses or solutions thereof, e.g. nitrocellulose lacquers, artificial resins or spinning masses. Examples show the preparation of typical dyestuffs and the application of one of them to the dyeing of cotton.  Specification 609,300 also is referred to.
Patent GB-821953-A (GB)
Title: Improvements in or relating to pipes manufactured from helically wound strip
IPC: B21C37/12
Filed: 1956-03-12
Abstract: 821,953. Making tubes; soldering; welding by pressure. MANUFACTURE DE MACHINES DU HAUT RHIN S.A. March 12, 1956 [May 6, 1955], No. 7719/56. Classes 83 (2) and 83 (4). [Also in Group XXVIII] In making a substantially cylindrical tube or pipe a number of turns of metal strip 1 is wound helically with each turn overlapping a part of only the immediately preceding turn along the length of the tube or pipe and the overlapping portions 2 of the turns are soldered or spot welded together at points 4 lying on a line 3 parallel to the axis of the tube or pipe. In an embodiment the tube is formed from two helically wound strips 1, alternate turns being formed from one strip and the remainder from the other strip. When the turns are to be soldered the strip may be coated on at least one face with lead base alloy and the tube passed in front of one or more burners to effect soldering at points 4 on a line 3. When the turns are to be spot welded, the tube is passed between idler electrodes. The pipe may be helically corrugated and more than one line of joined points may be formed.
Patent GB-1418992-A (GB)
Title: Method and apparatus for determining top dead centre in an internal combustion engine electro
IPC: G01B5/00
Filed: 1973-02-16
Abstract: 1418992 Measuring T D C in an I C engine electrically SCANS ASSOCIATES Inc 16 Feb 1973 [12 May 1972] 7766/73 Headings G1M and G1N A method of determining in an I. C. engine T.D.C. for No. 1 piston comprises setting the position of the crankshaft so that the journal of the piston adjacent to No. 1 (i.e. No. 3 in a V-8 engine) is at an angle equal to the angle between the journals of the pistons (i.e. 90 degrees for a square crankshaft) as measured from a plane containing the centre line of the cylinder bores and then marking the position of No. 1 piston as T.D.C. The apparatus includes transformers 31 having probes 34 contacting by way of shafts 36 and screws 46 the top of pistons No. 3 and 5, the signals from the transformers being subtracted so that when the resultant signal is zero both pistons are at their mid-crank position and therefore No. 1 is at T.D.C. The region above the pistons is enclosed by a frame member 33 providing a vacuum seal so that when the region is evacuated, piston-rod 60 is retracted into vacuum cylinder 61 whereby the crows-feet devices 42 carrying screws 46 are lowered into respective cylinders to contact pistons No. 3 and 5. The engine is then slowly rotated for zero resultant signal from the transformers. Alternatively for a six cylinder inline engine where the crankshaft journals are spaced by 120 degrees when the uppermost journal is at T.D.C. the other two are level so a platform (23) is arranged on a hydraulic cylinder (22) Fig. 4 (not shown) which is raised until it contacts both the lower journals when the uppermost journal is at T.D.C.
Patent GB-1471856-A (GB)
Title: Cyclohexene derivatives
IPC: C07C49/242
Filed: 1976-06-16
Abstract: 1471856 Cyclohexene derivatives SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 27 Feb 1976 07818/76 Heading C2C The invention comprises compounds of the formula where R 1  and R 4  are alkyl, R 2  and R 3  are H or alkyl and A is a trivalent group of the formula the central carbon atom of which is linked to the cyclohexene ring to form a bicyclo system, or, when R 2  is alkyl and R 3  is H, A may also represent a divalent group of the formula or -CH=CH-CH 2 -. Compounds wherein A is the trivalent group are prepared by cyclizing compounds wherein A is the group in the presence of an acid catalyst. Compounds wherein A is the group -CH 2 -CH=CH- are prepared by condensing compounds of the formula and CH 3 COR 4  in the presence of a basic catalyst. Compounds wherein A is the group are prepared by isomerizing compounds wherein A is the group -CH 2 -CH=CH-.
Patent GB-1136166-A (GB)
Title: Ball and process for production thereof
IPC: A63B37/00
Filed: 1966-02-22
Abstract: 1,136,166. Moulding balls. HOLLEY PLASTICS CO. 22 Feb., 1966 [23 Feb., 1965], No. 7821/66. Heading B5A. [Also in Division C3] Balls e.g. golf balls are made by moulding a mixture of one hundred parts by wt. of a urethane prepolymer and three to twelve parts by wt. of a curing agent. The mixture may be cured at room temperature or at an elevated temperature, the final part of the curing in the latter case being effected outside the mould. Alternatively both the prepolymer and the curing agent may be preheated before mixing. The mixture may be compression moulded, rotationally cast, centrifugally cast, vacuum cast, injection moulded or transfer moulded, to give hollow or solid balls, the component materials preferably being de-gassed before use.
Patent GB-544971-A (GB)
Title: Improved means for loading heaped materials
IPC: B65G65/00
Filed: 1940-08-02
Abstract: 544,971. Conveyers. TURNBULL, A. 1., and HOPE, W., (Representatives of TURNBULL, F.). Aug. 2, 1940, No. 7904. [Class 78 (i)] - In means for loading heaped materials such as coal, stones, sand or earth, comprising an inclined reciprocating shovel 10 which delivers the material to a band or other conveyer 13 or into a receptacle, the shovel has its forward end suspended from pivots 15 mounted in blocks sliding in inclined bearings 20 and its rear end supported by pivoted links 21 oscillated by mechanism giving a quick-return motion. As shown, the links 21 are connected by rods 36 to eccentrics 27 on a shaft 28 driven from a shaft 30 through elliptical wheels 29, and the swing of the shovel is cushioned by springs 22 on rods 25 pivoted to the links at 26. The shaft 30 is driven by chain gearing 32 from a main countershaft 35 driven through a cone clutch 38 and rope gearing from an electric motor 43. The clutch is disengaged by means of a hand lever 48 on a shaft 45 carrying arms 44 engaging the clutch. A supporting framework 17 for the shovel 10, conveyer 13 and driving mechanism is mounted on wheels 18 driven through separately controlled clutches 66 so that the framework can be slewed when required. Spur wheels 52 on the inner sides of the wheels are driven by pinions 53 on aligned shafts 54 connected through chain gearing 56, a shaft 58 carrying the clutches 66, chain gearing 59, reduction gear 62 and chain gearing 63 from the cone clutch 38. The gear 62 provides a forward, neutral and reverse drive. Either of the clutches 66 can be disengaged by means of clutch levers 67 having a pin-and-slot connection with a drawbar 70 sliding in guides 71, so that one or other clutch can be engaged by sliding the drawbar. The band conveyer 13 is supported 'by rollers 73 on the carriage 17 and discharges into a wagon or hopper or on to another conveyer. The conveyer 13 is driven continuously from the motor 43 through a chain 76. The shovel may be arranged to discharge on to a band or other conveyer at an angle to or parallel to the direction of movement of the material up the shovel, or may be of angled shape in plan to change the direction of movement of the material.
Patent GB-504492-A (GB)
Title: Improvements in or relating to carriage guides for lathes and like machine tools
IPC: B23Q1/01
Filed: 1938-03-14
Abstract: 504,492. Lathes. MASCHINENFABRIKSAKT.-GES. N. HEID. March 14, 1938, No. 7920. Convention date, April 14, 1937. [Class 83 (iii)] A lathe &c. has guideways for a saddle &c. comprising a rear flat horizontal prismatic guideway 7 and a front V-shaped guideway 6, the surfaces of which enclose an angle of approximately 90‹, the outer surface being less inclined to the horizontal than the inner surface, the V-shaped guideway having a third downwardly facing guide surface 9 at 90‹ the adjacent surface of the V-guideway, and the saddle being provided with an adjustable guide strip 14 bearing against the third guide surface. The adjustable strip 14 which may be a wedge may also engage a fourth horizontal guide surface on the underside of the front guideway and the rear sliding portion of the saddle may also be provided with an adjustable strip engaging the underside of the guideway.
Patent GB-540028-A (GB)
Title: Improvements in sliding clasp fasteners
IPC: A44B19/32
Filed: 1940-05-02
Abstract: 540,028. Sliding-clasp fasteners. BUCK, R., and CLARK, H. C. May 2, 1940, No. 7929. [Class 44] In a sliding - clasp fastening giving a water-tight closure by the provision of abutting rubber strips secured to the stringer tapes, rubber strips a are applied to both faces of each tape b, the strips being shaped to provide a recess d which accommodates the fastener elements c and the operating slider. The abutting faces of the strips may be serrated or rebated. The slider e has a thin web f projecting out between the edges of two of the strips and carrying the operating tab g. As shown, rollers f<1> which ride along the outer surfaces of the strips are also provided on the slider web.
Patent GB-1453416-A (GB)
Title: Production of printed circuit boards
IPC: H05K3/00
Filed: 1975-02-26
Abstract: 1453416 Printed circuits SIEMENS AG 26 Feb 1975 [29 March 1974] 7985/75 Heading H1R Printed circuit boards are fabricated from a substrate of, e.g. epoxy resin coated with a metal, e.g. copper layer 4 on one face thereof, with a negative photosensitive foil 5 thereon exposed to stray light 7 through a mask 6. The latter is edge under-radiated to a distance a corresponding to expected under-etching so that a region 8 of the foil 5 is unexposed and is removed after development of the foil. A corrosion resistant metallic layer 9 is then electrolysed on to the exposed region of layer 4 corresponding to the required pattern. Exposed regions of foil 5 are removed and the surface is covered with a positive photosensitive lacquer 10. Mask 6 is reapplied in an identical position located, e.g. by pins (not shown) and the layer 10 is exposed to parallel light through the mask 6 without under-radiation, so that the unexposed region 12 corresponds to the mask profile and overlaps the metal layer 9 by a distance corresponding to the expected under-etching. Layer 10 is developed, the exposed regions removed and the unwanted parts of metal layer 4 etched out to define conductor paths 13; the unexposed part 12 of photolacquer layer 10 being underetched to a distance a. After removal of layer 10 conductor path 13 remains, to which corrosion resistant metal layer 9 is firmly connected without under-etching. In a modification (Figs. 7 to 9, not shown) a multilayer laminate is provided in which plural insulant layers have intervening metal layers structured to define the required printed circuit patterns, while the outer insulant layers are covered overall with copper foil. Through holes are bored into the laminate, whose walls are electrolessly coated with copper for interconnection. A further layer of copper is then electrolytically deposited on the outer copper foils and on the walls of the holes, and a negative photosensitive foil thereon is exposed to stray light through a mask permitting underradiation to a distance corresponding to the expected under-etching. After development of the foil a lead-tin layer is electrolysed on to the exposed parts of the outer copper layer and on the hole walls, after which the photosensitive foil is replaced by a roller coated positive photolacquer not covering the hole walls. This is exposed to parallel light through the former mask and developed, so that the end surface of the lead-tin layer is overlapped to a distance a corresponding to the expected under-etching. The unwanted parts of the copper foil and layer are etched out to define a required circuit, and the photolacquer layer is removed.
Patent GB-107616-A (GB)
Title: Improvements in or relating to Pivots.
Inventor: LEE FRED
IPC: G01C17/00
Filed: 1916-06-06
Abstract: 107,616. Lee, F. June 6, 1916. Drawings to Specification. Magnetic compasses.-Relates to the pivoting of instruments subjected to vibration, for example compasses employed on aircraft. According to the invention, a polished stone pivot and bearing, for example a cup, are employed, the polish being such that roughness, if present, is only visible under a magnification of 25 diameters or more. The stone is such as is used for jewelled bearings, for example sapphire, agate, ruby or diamond, and may be a synthetic stone. The pivot is preferably conical with slightly curved sides and having an angle at its apex of between 56 and 70 degrees, the point being slightly rounded off. According to Provisional Specification 8026/16, a steel or other metallic cup may be used.
Patent GB-329739-A (GB)
Title: Improvements in laminated structures for dynamo-electric machines
IPC: H02K1/18
Filed: 1929-03-12
Abstract: 329,739. Barlow, E., and Associated Electrical Industries, Ltd. March 12, 1929. Cores.-In a dynamo-electric machine having a stator or rotor core constructed of segmental laminations formed at each end with a slot or projection arranged to fit correspondinglyshaped bars or recesses disposed around the stator frame or rotor spider, the bars or recesses are so arranged as to permit each segment to be formed straight along the whole or a substantial portion of that edge which is located adjacent to the periphery of the stator frame or rotor spider while allowing a clearance space between the edge and the intermediate bar. Fig. 1 shows a stator frame comprising a pair of similar plates 1 spaced apart and supporting a cover-plate 2. The inner peripheries 3 of the plates 1 are formed with aligned slots 4 in which bars 5 of rectangular or other cross-section are welded. The core laminations comprise segments 6, Fig. 2, formed with straight front and back edges 7, 8 and having slots 10 at the back corners to engage with alternate bars 5, 5<11> as shown in Fig. 4. The intermediate bar 5' has a small clearance from the edge 8 and engages adjacent segments 6<1>, 6<11> of the adjacent layer of laminations. Alternate layers therefore break joint. If the distance between the bars 5 is great, each segment 6 is formed with its outer edge bounded by three straight lines 17, 18, 19, Fig. 7, so as to maintain a suitable clearance between the edge 18 and the intermediate bar 5' with as great a segment area as possible. If the bars are close together, the back edge may be notched to allow the necessary clearance between it and the intermediate bar. The invention may be applied to cast stator-yokes and the portioning bars may be integral with the stator frame or rotor spider. Fig. 9 shows a stator formed with ribs 21 and the plates 6 are formed with projections 20 which engage the forked ends of the ribs. Since the back edges of the segments are straight, they may be stamped from a sheet of material in such a way that these edges constitute the actual edge of the material as received so that the amount of cutting and the waste are reduced as much as possible.
Patent GB-889845-A (GB)
Title: Improvements in and relating to cameras
IPC: G03B7/085
Filed: 1960-03-08
Abstract: 889,845. Photo-electric exposure controls. VOCKENHUBER, K. March 8, 1960 [March 13, 1959], No. 8112/60. Class 40(3). A manual override, for a photo-electrically controlled camera diaphragm, comprises -means for simultaneously disconnecting and rotating the galvanometer. The galvanometer 1 which controls blades 10, 11 may be rotated by a gear wheel 18 which also closes switch 20 to short-circuit the meter. By rotation of gear wheel 18 ,any desired aperture down to a completely closed diaphragm may be set manually. A switch 21 is provided to override switch 20 when gear wheel 18 is rotated for fading in or out.
Patent GB-732285-A (GB)
Title: Improvements in yarn winding machines
Inventor: RIDGWAY FRANK
IPC: B65H63/036
Filed: 1953-03-25
Abstract: 732,285. Winding yarn. ARUNDEL, COULTHARD & CO., Ltd. March 16, 1954 [March 25, 1953], No. 8201/53. Class 120(2). In a yarn winding machine having a driven drum g which rotates the winding package f carried in a pivotally-mounted cradle a and furnished with a brake s, t, brought into contact with the cheese when knock-off occurs, the cradle a also withdrawing the cheese f from contact with the drum g, the cradle a beyond its pivot point b in the main lever c supported normally by detector mechanism 2, 3, 4, has an extension h to which a chain i carrying a weight j is secured, the chain i passing over a part m on a lever n which turns about the fulcrum b so that the weight j hangs from the part m, a stop u being provided to limit the movement of the lever n towards the cradle extension h, the weight during normal winding holding the cheese f against the drum g and, at knock-off, drawing the cradle a downwards and effecting the movement of the brake s, t, against the cheese.