baber/WOPTO huggingface dataset:
Patent GB-1135251-A (GB)
Title: Improvements in machines for grinding twist drills
Inventor: BRAMHALL JOHN MICHAEL
IPC: B24B3/24
Filed: 1966-01-26
Abstract: 1,135,251. Grinding. SHEFFIELD TWIST DRILL & STEEL CO. Ltd. 6 Jan., 1967 [26 [Jan., 1966], No. 3497/66. Heading B3D. A machine for grinding a step point of a multi-diameter twist drill comprises a drill holding assembly which is movable to move the step point 13a of the drill 13 into engagement with an independently mounted grinding wheel 31 and which includes a support bracket 22 mounted on a rotatable shaft 26 and pivotable about the axis 28 of the shaft, a carriage 5, 5b slidably adjustable on the bracket in a plane parallel with the axis of the shaft, a drill clamping means 1 ... 4 slidably mounted on the carriage for holding the drill with its axis and means 18 for axially adjusting the drill in the clamping means, the drill holding assembly being mounted on a compound slide 36, 37, 38 rotatable about an axis 38a at right-angles to the axis 28 of the shaft for adjusting the position of the drill holding assembly relative to the grinding wheel. The bracket 22 is secured to one end of the shaft 26 which is mounted in bearings 26a in a cylindrical housing 27a carried by an arm 27 connected to the compound slide 36, 37, 38 for adjustment in two directions at right-angles to one another and about the axis 38a. The bracket has a pivot 20 about which a block 19 is pivotally adjustable, the block slidably receiving the part 5b of the carriage which is guided for movement by a key 5a and is movable by a screw 24. An extension 5 of the carriage carries a bracket 4 having pivots 3 for a pair of arms 1, 2 having interchangeable jams 6 which are movable by a screw 8 to grip the drill 13. The end of the drill is supported by a centre 14 adjustably mounted on the end of the extension 5. A weight 46 is provided for balancing the apparatus and rotation of the shaft 26 is limited in each direction by adjustable stop elements 29, 30. The grinding wheel is rotatable about an axis 31a and its edge 32 is formed with a chamfer in a plane parallel to the drill axis by a diamond 33 mounted on the pivot 20 and moved past the grinding wheel by adjustment of slide 36. Adjustment of slide 37 brings the step of the drill into engagement with the grinding wheel and the drill is simultaneously advanced by movement of carriage 5, 5b by means of screw 24 and rotated about the axis of shaft 26 between limits determined by the stop elements 29, 30. When one flank has been ground, an adjustable stop 33a is engaged with extension 49 of block 4 so that, after the drill is indexed in the jaws 6 for grinding the next flank, the drill can be positioned so that both flanks are ground equally.
Patent GB-249278-A (GB)
Title: Improvements in and relating to apparatus for the regulation of electric currents
IPC: H02P9/18
Filed: 1925-02-09
Abstract: 249,278. Farmer, C. D. Feb. 9, 1925. Regulation, automatic.- A regulating element is influenced by the resultant of two opposite velocities, one of which varies in response to the regulative setting of the element, the other varying in response to variations of the condition regulated in such a way as to maintain constant the said condition. As shown in Fig. 1, a constant speed motor 9 drives through a cone 8 a nut 5, 6 threaded on a screw 7 impressing thus a velocity of the former kind upon the nut. A velocity of the second kind is applied to the nut by rotation of the screw 7 by the motor 9 as controlled by a clutch 10, toggle 15 and torque motor 12 subiect to the conditions to be regulated. The regulating element 3 operating a regulating resistance follows the critical position at a higher speed when this is returning to the normal position than when it is departing from the normal, and in both cases the speed is higher at the commencement of the movement than at the arrival. In most cases this results in the element setting to a new position more quickly and with less hunting than if the return speed were equal to or less than the departure speed, but these conditions may be realized by substituting a cylinder or a reversed cone for the cone 8. In the modification shown in Fig. 2 the nut 5 is driven along the screw by a. frame 21 driven by a motor 18, the speed of which is varied with the regulative setting of the elements 3 according to a law determined by the design of the motor and the inclusion of the varying resistance 1 in its field circuit. A relay 25 and a solenoid 24 control a clutch 23, which applies the constant speed drive of the motor 22 to the screw shaft 7. Alternatively the frame 21 and screw 7 might be coupled together by a spring lock so that normally the regulating element 3 remains stationary whilst two solenoids operated above and below the normal value of the regulated condition respectively, free the shaft 7 from the lock or clutch the motor 22 to the shaft. In both regulators a light brake 16 is continuously in engagement with the shaft 7.
Patent GB-1002203-A (GB)
Title: Process and apparatus for the electro-photographic re-production of pictures
IPC: G03G15/26
Filed: 1963-01-29
Abstract: 1,002,203. Printing apparatus. PENTAGON DRESDEN KAMERA-UND KENOWERKE VEB. Jan. 29, 1963, No. 3607/63 [Also in Divisions G2] Electro-photographic plates 5 are secured at 90 degree intervals by retaining members 4 to an inclined turntable 1, the turntable being driven by a motor 2 through friction wheel 3. A charging electrode 6 is arranged in advance of an exposure station having mirrors 7, 8, 9 and a light source 10 for projecting negatives 12 on to a charged plate 5 and on to a screen 27. An exposed plate 5 is then developed at a developing station having a supply vessel 15 for developer sprinkled over the plate 5 to form a powder image and a reception vessel 13, the vessels 13 and 15 being connected by conduits 14, 16. At a transfer station having a transfer electrode 20 the powder image on the plate is transferred to a paper web 19 which passes a heated sealing roller 21 before being cut into sheets by a rotary cutter 22. Cut sheets are inverted by a device 23 and fall printed side uppermost into a container. The plate 5 then has residual charges removed by exposure to a light source, not shown, and is then cleaned by a brush 25, loose powder being removed by suction through a conduit 26. During each stationary period of the turntable one plate is either exposed, developed, used for transfer of an image or cleaned. In a modification, for reproducing direct view originals lights 29 and 30, Fig. 2 (not shown), co-operate with lens 31 and mirror 9.
Patent GB-1167195-A (GB)
Title: Low Temperature Hydraulic Fluid.
Inventor: CROWE FRANK RONALD
Filed: 1966-01-27
Abstract: 1,167,195. Hydraulic fluids. BRITISH PETROLEUM CO. Ltd. 6 Jan., 1967 [27 Jan., 1966], No. 3674/66. Heading C5F. An hydraulic fluid comprises a denormalized gas oil and a minor amount of a polyacrylate, polymethacrylate or polyolefin sufficient to give a viscosity of 5-15 c.s. at 100‹ F. The fluid may also contain antioxidants, e.g. 2,6- ditertbutyl-p-cresol; 2,4 - dimethyl - 6 - tertbutyl - phenol; 4,41 - methylene - bis(2,6 - di - tertbutylphenol) and phenyl α-and #-naphthylamine, rust inhibitors, e.g. alkenyl succinic acid, alkylmercaptoacetic acid and alkaryloxy acetic acid, and anti-wear additives, e.g. tritolyl and trixylyl phosphates, phosphosulphurized hydrocarbons and zinc dithiophosphates of formula (R<SP>1</SP>O)(R<SP>2</SP>O)PS.S.Zn.S.PS(OR<SP>3</SP>)(OR<SP>4</SP>) where each R is C 3 -C 10 ) alkyl, aryl or alkaryl.
Patent GB-194107-A (GB)
Title: Improvements relating to oil strainers or separators
IPC: B03C1/28
Filed: 1922-02-08
Abstract: 194,107. Holt, F. B., Miller, L., and Metropolitan-Vickers Electrical Co., Ltd. Feb. 8, 1922. Magnetic separators.-A magnetic separator for extracting magnetic particles from oil or other liquid comprises a plurality of magnets arranged in spiral formation transversely of the path of the oil through the separator. Magnetic separators of this type are preferably arranged within the strainers of a non-magnetic oil strainer such as that described in Specification 146,647, [Class 46, Filtering &c.]. The magnetic separator 12 comprises a plurality of magnets 13 spirally arranged on a vertical rod 14 in a strainer 10 of the non-magnetic oil strainer 5. Cylindrical packing pieces 15 arranged between the magnets prevent the oil from passing through the centre of the strainer and cause the oil to flow in sinuous paths in contact with the poles of the magnets. When the oil is caused to flow through the non-magnetic oil strainer before it passes through the magnetic separator a primary magnetic separator of any suitable form may be arranged before the non-magnetic oil strainer to separate out the major portion of the magnetic particles and any such particles which may be carried past both the primary magnetic separator and the non-magnetic oil strainer will be extracted by the magnetic separator 12. The primary magnetic separator 20 may comprise an electromagnet 21 between the poles of which are arranged a number of steel or iron plates 24.
Patent GB-842781-A (GB)
Title: Process for the purification of crude cyanuric chloride by sublimation
Filed: 1958-02-05
Abstract: Purification of cyanuric chloride is affected by vaporization of the crude material in an evaporation zone, removing the vapour therefrom by an inert carrier gas and directing the mixture axially into a co-current of cooling gas, the temperatures and rates of flow of both gas streams being controlled such that the temperature of the resulting gaseous suspension of solid cyanuric chloride is not more than 10 DEG C. above the temperature of the cooling gas before mixing, and separating the solid cyanuric chloride.  The inert carrier gas is preferably preheated before contact with the <PICT:0842781/III/1> cyanuric chloride vapour to the temperature existing in the evaporation zone and the inert cooling gas which has the same composition as the carrier gas if the gases are to be recycled, may have a temperature of 0-120 DEG C.  Cyanuric chloride is evaporated in 11 at 140-190 DEG C. and the vapour swept by carrier gas e.g. N2 or air, preheated by 19, through 13 into nozzle 12 where it is directed axially into a co-current of cooling gas entering through an annular passage 14.  Cyanuric chloride condenses into a fine powder which due to the rate of flow of the gas stream and to the surrounding atmosphere of inert gas is not deposited on the walls of the funnel 15 but is carried into cyclone 16 where it separates. Residual gases are pumped by 17 and divided into two streams, one, of larger volume passing through larger bore tubing through a cooler 18 to be recycled as the cooling gas to nozzle 12, the other of lesser volume passing through preheater 19 to be recycled as carrier gas. In cooler 18 the temperature of the gas stream is not lowered by more than 10 DEG C. in order to avoid condensation of the residual cyanuric chloride remaining in the gas.  The apparatus may be constructed of synthetic resin materials which are uneffected by Hd e.g. polyvinyl chloride and polytetra fluoethylene.  Specification 800,703 is referred to.
Patent GB-372752-A (GB)
Title: Automatic starter for two- and polyphase alternating current motors
IPC: H02P1/12
Filed: 1931-02-06
Abstract: 372,752. Control of A.C. motors. NAAMLOOZE VENNOOTSCHAP HEEMAF, Hengelo, Holland. Feb. 6, 1931, No. 3821. Convention date, Feb. 27, 1930. [Class 38 (iii).] The windings of an induction motor 2 are changed from star to delta or are changed from a lower to a higher voltage during starting by a switch 6 operated by a speed sensitive device such as a centrifugal device 5. The switch 6 may be electromagnetically &c. actuated. The Specification as open to inspection under Sect. 91 (3) (a) disclosed also that the device 5 may be replaced by a tachometer generator and a contact-making voltmeter. This subjectmatter does not appear in the Specification as accepted.
Patent GB-163095-A (GB)
Title: Improvements relating to gas purifiers
IPC: C10K1/28
Filed: 1920-02-09
Abstract: 163,095. Blakeley, Sons, & Co., Ltd., F., and Blakeley, W. Feb. 9, 1920. Purifiers.-The pipe connections for two purifier boxes are so arranged that the flow of gas may be reversed in either or both boxes, or by-passed. Each box has two pipes communicating with a valve, and each valve is connected with the other and with a third valve which leads to the inlet and outlet pipes. Each valve comprises upper and lower cylindrical casings B, B' and an inverted cup A having an opening a arranged to be moved opposite to any one of three openings in the casing B, so as to form a gas-way through the opening b<5> in the lower casing and the pipe section shown dotted in Fig. 1. The other two openings in the upper casing form a second gas-way through the valve. The cup is rotated by means of worm gearing, which actuates a shaft a<5> having a pointer a<8>. Spring-pressed plungers a<1> bearing against a machined surface b<3> keep the face a<2> in contact with the seating b<4>. In a modification, the valve may be slightly raised or lowered by means of hand-wheels from or on to a conical or other seating and rotated as before round a vertical axis.
Patent GB-121677-A (GB)
Title: Apparatus for Finding or Computing Logarithms and Autilogarithms of Numbers.
Inventor: MACKENZIE KENNETH DONALD
IPC: G06G1/08
Filed: 1918-03-08
Abstract: 121,677. MacKenzie, K. D. March 8, 1918. Tabular calculators.-Apparatus for finding the logarithms and anti-logarithms of numbers comprises a cylinder a on which is printed in the usual way a table of logarithms, a single line of which is visible through a longitudinal slot-opening g in the casing. The upper edge h of this slot is bevelled) and carries sets of numbers k, l, representing the third and fourth figures of the number and appearing over the corresponding mantissa and log. mean differences on the table of logarithms. The right-hand portion of the cylinder is similarly arranged for finding anti-logarithms. The casing may be dispensed with, in which case the numbered edge h is on a straight bar. A tabular calculator e and a writing-pad d may be provided. In a modification, the tables of logarithms are arranged in flat form, over which the number edge h may slide.
Patent GB-755115-A (GB)
Title: Improvements in retractable writing instrument construction
IPC: B43K24/08
Filed: 1954-02-11
Abstract: 755,115. Spring clips; automatic catches. KIMBERLY CORPORATION. Feb. 11, 1954 [Feb. 16, 1953], No. 4078/54. Class 44. [Also in Group XV] In a writing instrument (see Group XV), a pocket clip 50, Fig. 2, secured to the instrument barrel by a ring 69, has a resilient tongue 62, Fig. 6, gripped by wings 65 and 66. The tongue 62, Fig. 2, presses a gripping foot 62 towards the barrel. A portion 51 of the clip 50 is depressed manually to release an inturned arm 32 of a spring detent 31 from a shoulder 42 and thus permit a spring 28 to retract a ball-point pen 18. Thus, when the instrument is attached to a user's pocket, retraction of 'the pen 18 within the barrel is assured, since depression of the portion is necessary to spring the foot 60 away from the barrel.
Patent GB-1031476-A (GB)
Title: Improvements in or relating to ceramic sound absorbing products
Inventor: OLLINGER JAMES CHARLES
IPC: C04B33/36
Filed: 1963-01-31
Abstract: A ceramic sound-absorbing material is formed from a mixture of water, Mississippi M and D clay or a similar material, and an inorganic wool, preferably blast-furnace or phosphate slag wool; sodium bicarbonate may also be included.  The properties of the clay are specified. The materials are made into a slurry containing 65-95% water and, based on the solids content, 60-80% inorganic wool and 40-20% clay with, if desired 0.5-9% sodium bicarbonate, the mass is formed into a sheet on a screen, dried and fired at 1000-1500 DEG  F.
Patent GB-540972-A (GB)
Title: An improved windscreen wiper for aircraft
IPC: B64C1/14
Filed: 1940-03-05
Abstract: 540,972. Hydraulic &c. motors; valve gears. AIRCRAFT HYDRAULIC APPLIANCES, Ltd., and WYLIE, H. N. March 5, 1940, No. 4087. [Class 69 (ii)] [Also in Group XXVI] The piston 19 of a hydraulic or other motor, which may for example actuate a wind-screen wiper through a rack 23 and pinion 24, actuates its reversing valve 27 through a link 40 engaged by stops 43 on a block 41 fixed on the piston rod and pinned at its other end to a sleeve 54, Fig. 5, by a pin passing through a groove in an outer sleeve 39 which is secured by pins 44, 51 to the valve stem and to a projection 52. This projection is grooved to engage locking balls normally pressed into locking position by a ridge in the sleeve 54 ; motion of this sleeve caused by the link 40 compresses one of the springs 47, and when the motion has released the projection 52 the spring shoots the valve into reverse position. The stops 43 carry arms 61, Fig. 10, by adjustment of which the times at which the link 42 ceases to swing freely between the stops and begins to move the valve gear can be varied. The motor may have a relief valve 37 providing a flow of liquid to warm the valve and motor during stoppages, and may have a parking latch 57.
Patent GB-490421-A (GB)
Title: Improvements in or relating to alloys of alkaline earth metals with aluminium
IPC: C22B5/04
Filed: 1937-02-11
Abstract: In a method of preparing alloys of aluminium and calcium in which an oxygen-containing compound, other than a sulphate or oxyhalide, of calcium is heated in a bath of molten aluminium, the slag which is formed in addition to the alloy may be used for the preparation of cements such as those known under the Registered Trade Mark "Ciment Fondu."ALSO:Aluminium alloys containing alkaline earth metals are made by heating in a bath of molten aluminium an oxygen-containing compound, other than a sulphate or an oxy-halide, of an alkaline earth metal at such a temperature, for example 1350-1600 DEG  C., that in addition to the desired alloy a molten slag is formed.  In the case of magnesium, barium, or strontium compounds, calcium aluminate may be added to the charge in order to make the slag sufficiently molten.  The process may be operated continuously by tapping off the aluminium alloy and some of the slag from time to time, and adding a further charge of starting materials.  In the case of magnesium, the process may be carried out in a closed furnace and means provided for condensing the evolved magnesium and aluminium vapours.  In the case of calcium, the slag may be used for the preparation of cements such as those known under the Registered Trade Mark "Ciment Fondu."
Patent GB-766012-A (GB)
Title: Anti-tubercular compositions
IPC: A61K31/195
Filed: 1954-02-11
Abstract: An antitubercular composition which may take the form of a capsule, drop, emulsion, syrup, injectable solution, or tablet, is produced by intimately dispersing a compound having a labile ethylthio radical in a pharmaceutical carrier which may be a liquid containing a flavouring agent or a solid, or in an animal foodstuff.  Examples of the active compounds are ethylthio ketals, alkyl, aryl and aralkyl ethylthio acetals, ethylthio esters and orthoesters, ethyl pseudothiourea and its nitrogen substituted derivatives, diethyl polysulphides, formaldehyde dithioacetal, benzaldehyde dithioacetal, alkali and alkaline earth metal salts of ethyl thiosulphate, ethylthio benzate, ethyltrithio orthoacetate, ethyltrithio orthobenzoate, hexathio orthomalonate, S - ethyl cysteine, S - ethylysteine sulphoxide, N - accetyl - S - ethyl cysteine, S- -ethyl cysteine ethyl ester, isonicstinic acid hydrazide, formaldehyde diethyl mercaptal, ethyl - t - butyl disulphide and ethyl isothiouronium bromide. The composition may contain a suitable carier, e.g. corn starch, sugar, talc, magnesium carbonate and stearate, together with flavouring, colouring and surface active agents, emulsifiers and solubilizers.  The composition may be coated with gelatin or with an enteric coating such as shellac, or cellulose acetate hydrogen phthalate.
Patent GB-1142931-A (GB)
Title: Process for the catalytic dehydrochlorination of chlorinated hydrocarbons
IPC: C07C17/25
Filed: 1966-01-31
Abstract: 1,142,931. Dehydrochlorination process. WACKER-CHEMIE G.m.b.H. 31 Jan., 1966 [29 Jan., 1965], No. 4134/66. Heading C2C. [Also in Divisions B1 and C5] Chlorinated aliphatic hydrocarbons are catalytically dehydrochlorinated in the gas phase at 140-340‹ C. using, as catalyst, activated charcoal which has been treated with a solution of colloidal silicic acid or an alkali metal silicate. The activated charcoal may optionally have been treated with an alkaline earth metal salt, e.g. concentrated barium chloride solution, subsequent to the treatment with silicic acid or silicate. Specified starting materials are di-, tri-, tetra- and penta-chloroethane and dichlorobutane.
Patent GB-229338-A (GB)
Title: Improvements in electrical condensers
IPC: H01G4/38
Filed: 1924-05-28
Abstract: 229,338. Dubilier, W. Feb. 14, 1924, [Convention date]. Condensers.-A condenser comprises a base plate 2 and cover plate 3, between which is mounted a stack 1 composed of three sets or groups 40, 41, 42 of tin foil sheets separated by dielectric sheets. The base plate is formed with an extension 6, to which a clip 37 is riveted by an eyelet 8. Two U-shaped clips 38, 39 embrace the plates 2, 3 with the stack 1, and are secured in position by eyelets 8. The sheets 40 are provided with projections 43 contacting with the clip 37, and the sheets 41, 42 are respectively in contact with the eyelets 8 of the clips 38, 39. By using different pairs of clips as terminals, three different working capacities can be obtained.
Patent GB-539245-A (GB)
Title: Improvements in detachable bits and method of making the same
IPC: E21B17/04
Filed: 1940-03-06
Abstract: 539,245. Heat-treating. DETACHABLE BIT CO. March 6, 1940, Nos. 4233 and 4234. Convention dates, March 9, 1939, and June 17, 1939. [Class 72] [Also in Group XXII] A detachable percussive rock drill bit 1, Fig. 1, having the plane of the cutting face substantially transverse to the grain structure of the bit is made from a profiled rolled steel bar 6, Fig. 2, from which the individual bits are cut to length, machined on the cut end to form the cutting edges and then heat treated to harden the cutting edges. For heat treatment the bits are heated to about 1550 F. and then quenched on the cutting face only by means of a water spray. A number of supports 20 having hinged covers 21, Fig. 14, with cruciform slots to receive the cutting face of a bit are arranged adjacent the furnace above a water tank, and after placing a heated bit on the cover 21 the spray is started and after a timed period of quenching the cover 21 is tipped and the bit delivered to a conveyer. A similar heat treatment may be used for resharpening used bits which are first heated over a gas burner device, fitted with wire gauze to prevent heating of the sides of the bit. The bit is then sharpened by a hot-milling cutter. After sharpening the cutter is quenched by the spray method described above.
Patent GB-140379-A (GB)
Title: Improvements in or relating to electric switches
IPC: H01H19/635
Filed: 1920-02-11
Abstract: 140,379. Vavre, J. M. March 20, 1919, [Convention date]. Switches, quick-break.-Flexible-blade brushes d are mounted in an insulating-block e sliding upon two guide-rods c. A yoke k is firmly fixed to the top of the guide-rods and forms a bearing for a spindle h carrying the operating-handle i. A tongue f is keyed to the spindle h and, when the handle is raised, forces the block e and brushes d down on to the contacts b. Springs mounted on the rods c ensure a quick break when the handle i is depressed.