baber/WOPTO huggingface dataset:
Patent GB-595089-A (GB)
Title: Improvements in or relating to astronomical charts
IPC: G09B27/04
Filed: 1945-04-16
Abstract: 595,089. Astronomical charts. SUTER, H. April 16, 1945, No. 9466. Convention date, Sept. 2, 1944. [Class 146 (ii)] [Also in Group XIX] An astronomical chart comprises a flat disc 21 which, in addition to showing the stars divided by lines into fields, and to having lines 22, 23 representing the ecliptic and the celestial equator respectively, is provided with concentric margins containing a right-ascension scale 27, two date scales 25, 26, which in association with scale 27 can be used for reading the right ascension of the true and mean sun respectively, a band 24 showing the zodiac signs, a pointer 30 pivoted at the celestial pole and having declination graduations, and a transparent disc 32 rotatable about the celestial pole carrying a scale 35 of mean local time and showing horizon lines 33, 34 (with and without refraction correction), meridian line 36 and prime vertical 38 for the zenith point z. The R.A. of the true sun and the mean sun can be obtained from the scale 27 by setting the pointer 30 at the required dates on the scales 25, 26 respectively. The position of a planet can be obtained by the intersection of the pointer with the ecliptic when the pointer is set at the R.A. on scale 27 as obtained from the nautical almanac. To ascertain the visible part of the heavens as given by the horizon lines 33, 34, the disc 32 is rotated until the required time on the scale 35 coincides with the date on the scale 26. The position of the sun is given by the intersection of the pointer 30 with the ecliptic when the pointer is set at the particular date. Rising time of the sun, a planet or a star is obtained by rotating disc 32 until the east edge of the horizon line intersects the sun, planet or star when the scale 35 gives the time for any date on the scale 26. Similarly the times of setting and culmination can be obtained. The difference between readings on the scale 27 corresponding to the same date on the scales 25, 26 gives the equation of time. Sidereal time at any instant can be obtained, by setting the disc 32 with the mean local time of the instant on the scale 35 adjacent to the date on the scale 26, and observing the reading on the scale 27 corresponding to the meridian line on the disc. To ascertain mean local time, a star on the meridian is used. The disc 32 is set with the meridian line on the star and the time reading obtained on the scale 35 opposite to the particular date on the scale 26. In the case of the Sidereal time and mean local time readings, a subsequent correction is necessary because the date reading corresponds to the midnight hour.
Patent GB-375786-A (GB)
Title: Improvements in or relating to coating compositions
IPC: D06L4/657
Filed: 1931-03-28
Abstract: Coating compositions for application to white or coloured fabric, canvas, leather, and the like, or for marking sports pitches and the like, consist of aqueous dispersions of powders of good covering power mixed with aqueous dispersions of rubber or the like as binders in such proportions that the rubber is not more than 20 per cent of the total dry solids.  Suitable powders are China clay, zinc oxide, whiting, chalk, talcum, lithopone, titanium dioxide, iron oxide, cadmium yellow, and ultramarine. Organic dyestuffs may be added. Binders specified are those containing rubber, guttapercha, balata, or similar vegetable resins, vulcanized, synthetic, waste or reclaimed rubber; and concentrates as specified in Specifications 219,635 and 290,313, [both in Class 70, Indiarubber &c.].  Known compounding and vulcanizing ingredients may be added.  Thickening ingredients specified are sodium silicate, bentonite, ball clay, starch, dextrin, cellulose and its derivatives, gum tragacanth, gelatin, carragheen moss, and seaweed extract.  The compositions may also be thickened by heat.
Patent GB-204729-A (GB)
Title: Improvements in helicopters
IPC: B64C27/04
Filed: 1922-04-03
Abstract: 204,729. Thompson, W. P., (Berliner, H. A.). April 3, 1922. Screw propellers.-The blades 19, 20 of an auxiliary variable-pitch propeller on a helicopter have arms 28, 29 connected to a yoke 30 rotarilv mounted on a rod 31 extending through the hollow driving-shaft of the propeller. The rod 31 has a bent end 32 engaging a slot 33 in a plate 25 which can be moved longitudinally of the machine to enable the pitch of the blades to be varied and reversed.
Patent GB-576625-A (GB)
Title: Improvements in or relating to brakes for vehicles
IPC: F16D65/22
Filed: 1943-06-12
Abstract: 576,625. Internal expanding brakes. PRATT, J. H., and IRVING, J. S June 12, 1943, No. 9492. [Class 103 (i)] Means for applying internal expanding brakes comprises a floating cranked lever of which one arm extends substantially parallel to the back plate and is connected to operating means while the other arm which extends substantially at right angles to the back plate engages staggered abutments on adjacent shoe ends, the lever or one of the abutments carrying a roller which bears on the back plate or a surface carried by it. As shown, a lever 41 arranged in a slot in a cylindrical post 34 fixed to the back plate 12 and which is connected by a rod 43 to the operating means engages laterally offset extensions 32, 33 of the webs of the shoes 10, 11. The extensions 32, 33 are received in notches 35, 36 in the post and have cranked ends which embrace the post to locate the shoe ends in the radial direction. When a pull is applied to the rod 43, the lever fulcrums on the end of the web 33 which is urged to the right while the web 32 is urged to the left. The component of the force applied by the lever acting in the direction of the back plate 12 is taken by a roller 45 carried by the lever end which rolls on the surface 46 of the slot. The webs of the shoes as a whole may be offset on opposite sides of the central plane of the shoes. In a modification the web 33 enters a slot in a pivot on which the roller is mounted. To permit rocking of the lever in two planes at right angles to each other, this pivot may be replaced by a spherical member having two grooves at right angles to each other which are engaged respectively by the lever and the shoe web. The link 43 may be connected to the piston of a fluid pressure cylinder mounted on the outside of the back plate and if mechanical operation is also desired a second link may be connected to the lever for this purpose. In a brake of the kind in which the shoes anchor about either end according to the direction of rotation of the drum, levers may be arranged at each end of the shoes, the operating means of the two levers being coupled for simultaneous operation. Specification 576,626 is referred to.
Patent GB-1168866-A (GB)
Title: Polymeric Polycarbamate-Pyran Aldehyde Condensates
Inventor: FINNERTY THOMAS GERARD
IPC: C08J9/14
Filed: 1967-02-28
Abstract: 1,168,866. Polycarbamate-dihydropyran aldehyde polycondensates and foams. IMPERIAL CHEMICAL INDUSTRIES Ltd. 30 Jan., 1968 [28 Feb., 1967], No. 9497/67. Headings C3C and C3R. A polymer is obtained by condensing a polycarbamate of molecular weight at least 148 with 2 - formyl - 3: 4 - dihydro - 2H - pyran (acrolein dimer) or a substitution derivative thereof in the presence of a catalyst. The product contains units wherein R and R<SP>1</SP> represent H, halogen atoms or alkyl radicals, linked by polycarbamate residues. Suitable polycarbamates may be derived from polyhydroxy polyethers or polyesters, hydroxyl-containing glycerides or diols by replacing -OH groups by -O.CO.NH 2  groups, e.g. by reaction with COCl 2  followed by NH 3 , or with urea or ethyl carbamate. Suitable hydroxy compounds are reaction products of cyclic oxides with compounds containing 2 or more active hydrogen atoms (lists), polycarboxylic acid/polyol polyesters (lists), castor oil, hydrogenated castor oil, hexadecane diol and dodecane diol. Suitable formyldihydropyrans include acrolein dimer, and the 2- or 5- or 2: 5-C 1-4  alkyl-substituted or 2: 5 dihalo compounds, e.g. methacrolein dimer. Suitable catalysts include p-toluenesulphonic acid and BF 3  etherate (lists), in amount 0À005-5 wt. per cent of the polymer, optionally in solution (list). Blowing agents, e.g. halogenated hydrocarbons (list), and siloxane-oxyalkylene copolymers may be added, if the resin is to be foamed. Pigments, stabilizers, plasticizers and flameproofing agents may be added. The reaction may be conducted in solution or emulsion or by casting, e.g. as a foam. In Examples foams are prepared from acrolein dimer, with CFCl 3  and a siloxane-oxyalkylene block copolymer, and polycarbamates derived from polyoxypropylated sorbitol or hexanetriol (i.p.o. p-toluenesulphonic acid) or from castor oil or polyoxypropylated trimethylolpropane (i.p.o. BF 3  etherate); solids or rubbers are prepared from acrolein dimer, optionally with allyl carbamate, and castor oil or polyoxypropylated trimethylolpropane i.p.o. p-toluenesulphonic acid or BF 3  etherate.
Patent GB-220021-A (GB)
Title: Improvements in and relating to brakes for controlling rotary motion
IPC: F16D49/10
Filed: 1923-04-06
Abstract: 220,021. Wilson, W. G. April 6, 1923. Band; compensating for wear. - A band brake adapted to produce a substantially equalized braking effect over the whole circumference of the braked member and to eliminate the tendency to distort its centre axis comprises, in the form shown, a flexible primary band e anchored at one end f to the point g, and a pair of secondary brake bands a, b, one end of the former being secured by rivets i to the end f of the band e, whilst one end of the latter is riveted at j to a lug k which is anchored at n and extends through a slot in the band e. The bands a, b extend round the drum side by side and have their free ends respectively near the eye-piece f<1> of the band e, and at the point m, whilst they are anchored at opposite sides of the drum by the links g<1>, n<1>, which are substantially parallel. When the band brake is applied as by a rod h, the relative movement which occurs between the bands e, b results in a uniform and balanced braking action. On releasing the brake, the bands are supported and held clear of the drum by the arms k of a pair of bell-crank levers fulcrumed at k<1>. These levers are preferably connected to plates s on the band e by means of springs t, so that when wear has occurred and the arms q contact with the casing r during an application of the brake, the arms k are swung upwardly and take up a new position with respect to the plates s, such that they still suffice to hold the bands clear of the drum on release. The band a may be dispensed with by forming the half of the. band e which backs it as a direct brake.
Patent GB-1208472-A (GB)
Title: Light guides
Inventor: ALLAN WILLIAM BELL
IPC: C03B37/14
Filed: 1968-02-28
Abstract: 1,208,472. Light guides. RANK ORGANISATION Ltd. Feb.28, 1969 [Feb.28, 1968], No.9585/68. Heading G2J. A method of forming a light guide comprises winding a light transmitting filament on to a former 13 whilst effecting relative movement between the former and a guide holding the filament, so that the filament is laid repeatedly over the same endless loop which has at least one crossing point, the bundle formed being severed to give the guide. The former 13 is rotated about its axis 14 whilst the guide is moved longitudinally relative to the former so as to form a figure of eight loop which is severed at the crossing point X-X to give a "Y" guide; if the bundle is also severed at Z two "Y" guides result. The winding may be such that severing at the crossover point gives a "multitailed" guide Fig. 4 (not shown), or the filament may be wound in a sinuous manner Fig. 5 (not shown), or as a re-entrant helix, Fig.6, wherein severing at A gives a long straight guide. The junction of the "Y" guide may be strengthened before or after severing by binding; alternatively the crossing point may be extended circumferentially.
Patent GB-295268-A (GB)
Title: Improvements in and connected with fuel burners
IPC: F23D14/62
Filed: 1927-04-07
Abstract: 295,268. Hammond, C. F., and Shackleton, W. April 7, 1927. Atmospheric gas, spray, and pulverulent fuel burners; subaqueous burners. - A diffuser or mixing device for supplying combustible mixtures to burners and internal combustion engines comprises a pile of superposed flat or dished plates or discs formed with slots, grooves, or corrugations to divide a gaseous fluid passing under pressure between neighbouring discs into numerous small streams or jets. The diffuser is mainly intended for supplying powdered or heavy liquid fuel to submerged flame burners but is suitable also for use with light liquid or gaseous fuel. Fig. 1 shows the upper part of a burner in which liquid fuel overflowing the serrated edge h of a trough a, after being preliminarily atomized by jets of air or superheated steam impinging on it from conical nozzles k<1>, l<1>, passes through an annular space m to an annular passage n enclosed between two annular piles o, p of discs from which issue numerous small streams or jets of air so that complete diffusion of the fuel particles throughout the combustion air is obtained. The combustion mixture is conducted from the space n through a flame guard to a high velocity mixture passage and thence to a combustion chamber as described in Specification 261,808 or to the induction pipe of an internal combustion engine. Oil is supplied to the trough a through a passage f and relatively high-pressure air is supplied to the jets k<1>, l<1> at an inlet i. Fig. 3 shows the upper part of a burner in which powdered fuel supplied to an annular rotating ledge 15 falls through vertical ducts 16 in a plug 14 into an annular space 1 between piles 2, 3 of dished rings from which issue numerous air jets. Alternate rings 5 of each pile may be formed, as shown in the lower half of Fig. 6, with a number of air inlet notches 6 communicating with keyhole delivery slots 8 formed, as shown in the upper half of Fig. 6, in the intermediate rings 7. The direction of the delivery slots is such that swirls in opposite directions are imparted to the air issuing from the outer and inner piles of rings. Small piles of rings may be spaced apart by thick washers 10. Fig. 7 shows a burner in which air jets are projected perpendicularly from between flat rings 17 constructed as shown in Fig. 6 into gas passing through an annular passage 18. Fig. 11 shows a cross section through a burner in which air and gas issue from passages 24, 28 respectively through the spaces between alternating plain and corrugated rings into a passage 25 leading to the burner nozzle. The corrugated rings may be replaced by laminµ of wire netting. The piles of rings may contain at intervals baffle rings having eccentric peripheries so arranged as to cause the fuel stream to follow a helical path.
Patent GB-273826-A (GB)
Title: Improvements in or relating to telephone transmission systems
IPC: H04B3/10
Filed: 1926-04-12
Abstract: 273,826. Standard Telephones & Cables, Ltd., and Hinton, L. T. April 12, 1926. Thermionic amplifiers.-A thermionic valve used as an amplifier or repeater in a telephonic or like transmission system has an extra control electrode for the purpose of automatic gain regulation. As shown in Fig. 1, the amplifier V is connected in the usual way between an input circuit I and an output circuit O. The incoming currents are partially shunted and applied to a rectifying-valve K. The plate circuit of the rectifier includes a resistance R and a choke L for suppressing speech frequencies, which are bypassed by a condenser C1. The resistance R is included between the earthed filaments and the extra control grid G2 of the amplifier. The voltage thus applied to the grid G2 is varied in proportion to the strength of the incoming signals; and the gain of the amplifier is thereby varied so as to maintain a standard strength of signal in the output circuit O. In the modification shown in Fig. 2, a pilot wire a, b extends adjacent to the telephone lines so as to be subjected to the same climatic and temperature variations. Direct current is sent through the pilot line from a source D through a variable resistance R, and the circuit of the extra grid G2 includes the resistance R. Any alteration in the resistance of the telephone lines will be accompanied by a similar alteration in the pilot line, and will be reflected in the voltage applied to the grid G2. The pilot wires a, b may form a complete loop, with the battery D and resistance R connected across the loop. The pilot wire circuit may comprise a phantom circuit.
Patent GB-557891-A (GB)
Title: Apparatus for automatically arresting the feed of material to a receiver, according to weight
IPC: B65G47/00
Filed: 1942-07-13
Abstract: 557,891. Jigging conveyers. STRAIN, G. H. July 13, 1942. No. 9709. Addition to 552,073. [Class 78 (i)] [Also in Group XVIII] The vibrating conveyer device described and claimed in the parent Specification is provided with means whereby the movements of the conveyer are automatically arrested when a predetermined weight of pulverulent or broken material has been discharged into a receiver. The material from a hopper a passes along a pipe b and falls into a receiver j resting on the platform of a weighing machine provided with a yoke 1. The pipe is supported on links f and is vibrated as described in the parent Specification by a rotating unbalanced weight e, and a weight c impacting intermittently against a striker plate g secured to one of the links. Toggle arms m, m<SP>1</SP> united by a pin m<SP>2</SP> are connected to links n carrying a pressure plate o. A rubber pad q is carried by the toggle arm m<SP>1</SP>. The toggle is raised to the position shown in full lines by means of an extension m<SP>4</SP> of the toggle arm m. In operation, when the feed of material to the receiver is completed the yoke 1 descends and a screw s breaks'the toggle thus causing the pad q to clamp down upon the pipe b. The pressure plate o is also brought against a pad p to rock the links f and striker plate g out of reach of the vibrating weight c, thus arresting the feed of material.
Patent GB-900530-A (GB)
Filed: 1961-03-16
Abstract: 900,530. Drain pipes. HORN, A. March 16, 1961 [March 21, 1960], No. 9716/61. Class 99(2). A pipe for drainage or irrigation is wholly or partly of porous concrete and has an ogival cross-section, the point being at the top of the pipe; the pipe has a substantially flat underface. As shown, the base of the pipe is formed with continuous or interrupted recesses, flutes or grooves 7, 8, and the parting boundary between the upper dense or porous portions and the lower porous or dense portions of the pipe is along upwardly inclined planes 9. For use in soft soils the pipe may have a widened base or be provided with feet 10.
Patent GB-948238-A (GB)
Title: Improvements in or relating to switching circuits
IPC: H03K3/012
Filed: 1962-03-14
Abstract: 948,238. Transistor switching circuits. RAYTHEON CO. March 14, 1962 [Sept. 25, 1961], No. 9810/62. Heading H3T. A switching circuit, Fig. 1, comprises an avalanche transistor 10 with its collector clamped to a potential V 2  greater than the avalanche voltage, but less than the " punchthrough " voltage. As described, the clamp circuit comprises a diode 22 and enables the circuit to be switched into avalanche operation, by a positive input pulse at 14, under a wide range of loading conditions. Two such similar circuits may be cross-coupled to form a bi-stable trigger circuit, Fig. 4, in which the trailing edge of a positive pulse applied at 44 switches the circuit into one state, and that of a positive pulse applied at 54 switches it into the other state.
Patent GB-1216996-A (GB)
Title: Television deflection circuit
Inventor: DEAN JACK ALLEN
IPC: H03K4/90
Filed: 1968-02-29
Abstract: 1,216,996. Sawtooth circuits. RCA CORPORATION. 29 Feb., 1968 [21 March, 1967], No. 9858/68. Heading H3P. A vertical deflection circuit for a television receiver comprises a capacitor 46 for developing a sawtooth voltage waveform which is fed to the control electrode of an amplifying device 22, the output of which is coupled at V, V<SP>1</SP> to deflection windings. A further capacitor 28 is charged by a diode 32 during the flyback period and discharged during the forward stroke via resistors 38, 40 connected to a stabilized voltage source. Part of the waveform across capacitor 28 is coupled via resistor 42 to the grid so that the grid bias and hence the trace linearity is adjustable by resistor 30. The stabilized supply is preferably provided by a VDR 36 and is adjustable by resistor 38 (height control). The circuit is preferably made self-oscillatory by feedback from the secondary of the output transformer 24 via an integrator 56 to the base of transistor 50 which discharges the time base capacitor 46 at the end of each sweep. A hold control 60 is provided. The circuit is synchronized by pulses fed to the grid of valve 22 or the base of transistor 50. Modifications.-Transistor 50 may be replaced by a vacuum triode. Resistor 23 may be omitted.
Patent GB-1536248-A (GB)
Title: Package for double-armed sutures with self-centreing pledgets
IPC: A61B17/04
Filed: 1977-03-09
Abstract: 1536248 Suture packages ETHICON Inc 9 March 1977 [10 March 1976] 09897/77 Heading A5R [Also in Division B8] A package for a double-armed suture having a pledget 16, i.e. a cushioning pad to prevent the suture strand from cutting into the tissue, slidably attached to the suture strand adjacent one of the needles 14, comprises a suture storage compartment and a flap 20 extending from the storage compartment and having an opening receiving the ends of the suture strand, said opening having a size and shape such that when the suture is withdrawn from the storage compartment, the pledget is restrained by an edge of the opening and slidably displaced along the length of the suture until the latter is fully withdrawn, whereby the pledget is automatically centred between the needles. Fig. 2 shows a package comprising two pairs of superimposed suture compartments formed by heat sealing three panels (10, 11, 12), Fig. 1 (not shown), along seal lines 17, the lower said panel being integral with the flap 20 which is provided with four openings 13a, 13b, 13c, 13d for receiving the respective sutures. Each opening comprises a semi-circular portion (28), Fig. 5 (not shown), and an aperture (27) connected together by an arcuate slot (26); the suture strand passes through the aperture (27) while the pledget is restrained by the straight edge (30) of the semi-circular portion. In a modification, Fig. 6, the opening comprises two apertures 27 connected by an arcuate slot 26. The flap 20 may be folded forward along a fold line 19 and the package placed in a sleeve (18), Fig. 7 (not shown), and hermetically sealed in an outer envelope (31). In Fig. 9 (not shown) the flap 20 is omitted and the suture passes through an opening in the wall of the suture compartment. The panels (10, 11, 12) are suitably made of paperboard, plastics or metal foil.