baber/WOPTO huggingface dataset:
Patent GB-569012-A (GB)
Title: Improvements in or relating to micrometer gauges
IPC: G01B3/18
Filed: 1943-04-28
Abstract: 569,012. Calliper gauges. TRICO PRODUCTS CORPORATION. April 28, 1943, No. 6734. Convention date, May 4, 1942. [Class 106 (ii)] In a limit gauge in which the work to be measured is introduced between a fixed anvil and a movable work-engaging pin the movement of which is amplified by a lever or system of levers embodying a pointer, the workengaging pin is provided with means tending to urge it towards the anvil but is normally held in a retracted position by means which may be manually rendered inoperative so as to permit the pin to be projected by the urging means against the work to be measured. As shown in Fig. 5, the work is engaged by the anvil 1 and a sliding pin 6 which is held in retracted position by a bell-crank lever 52 actuated by a spring 51 and released by pressing a button 56. The extent of movement of the lever may be varied by a set-screw 57. Movement of the pin 6 is communicated to the shorter arm 13 of a lever 14, Fig. 4, the longer arm 22 of which engages with the shorter arm 23 of a lever 24 having its longer arm 31 stamped from light sheet metal and terminating in a pointer 33 arranged beneath a window 34 of the casing enclosing the lever system. The levers have knife edge fulcrums 16, 26, Figs. 2 and 3, the bearing for the knife edge 16 being removably mounted on the lever 14 and having V-shape and flat bearing surfaces. Springs 17 and 27 are interposed between projections on the casing and the levers and urge the pin 6 towards the work when it is released by retracting lever 52 against the action of a spring 8 bearing on a collar 9 of the pin 6. Adjustable limit members 46, 47 showing the maximum and minimum tolerance allowable are arranged at the sides of the pointer 33.
Patent GB-1448624-A (GB)
Title: Method of and apparatus for forming rail-road level corssing
IPC: E01B2/00
Filed: 1974-02-14
Abstract: 1448624 Railway level crossings SZARKA ENTERPRISES INC 14 Feb 1974 [5 March 1973] 6743/74 Heading E1G A level crossing, for use with a pair of running rails 12, 14 supported by sleepers 16, comprises a slab 22 supported by pads 30 on the sleepers, the pads being of unset material which is initially deformable and which hardens on setting. Preferably the slab is connected to the rails 12, 14 by brackets 40. The slab 22 is of precast reinforced concrete with a pair of rails 46 at its edges held together by tie rods 48 within the slab. During assembly the slab 22 is temporarily supported by wooden shims 28 while the pads 30, comprising bags of mortar, set. The slab is connected to the rails 12, 14 by brackets 40 which are bolted to angle iron base plates 32 secured by brackets 34. End slabs 24 may be provided and are supported in the same way. The running rails may be insulated from the crossing by a sheet 54, Fig. 4, and the slabs may have a layer of a solid urethane elastomer bonded to the top surface, Fig. 7 (not shown). Similar slabs of differing plan may be used for switching sections or curved track.
Patent GB-399529-A (GB)
Title: Improvements in or relating to the treatment of aliphatic acids
IPC: C07C51/46
Filed: 1932-03-07
Abstract: Acetic and other aliphatic acids are concentrated by extracting with a solvent of low boiling-point such as ether, wholly or partly removing this solvent from the extract, and then adding an entraining agent and distilling so as to remove the water as an azeotropic mixture of lower boiling-point than the acid.  Preferably the solvent for making the extract is one which does not form an azeotropic mixture with water.  The extraction may be effected as a batch process or continuously in counter-current, and the removal of the solvent from the extract may be effected by the heat of condensation of the azeotropic mixture.  The azeotropic distillation may be effected in any manner, and the entraining agent may be added in liquid or vapour form; entraining agent separating in the condenser may be returned for the removal of more water.  Suitable entraining agents are benzene, ethylene dichloride, dichlorethylene, trichlorethylene, ethyl acetate, butyl acetate and mixtures thereof. In an example, a 30 per cent acetic acid is extracted with ether, the ether is distilled off from the extract with utilization of the heat of condensation of the azeotropic mixture, and the partially concentrated acid is distilled with benzene to remove the water.
Patent GB-766053-A (GB)
Title: Improvements in or relating to electrostatic machines
IPC: H02N1/10
Filed: 1955-03-08
Abstract: 766,053. Electrostatic generators. FELICI, N., and GARTNER, E. March 8, 1955 [March 8, 1954], No. 6790/55. Class 35. In an electrostatic generator as described in Specification 719,687, the semi-conducting sleeve which screens the charge-inducing plates is replaced or supplemented by a semi-conducting envelope 5 round the edges of the plates, as shown in Fig. 1b, and if desired, round the flat surfaces as well, as shown in Fig. 1c. If desired, a thin continuous semi-conducting layer 13 may also be employed as shown in Fig. 2a, the covered or bare plate surface either extending through it, or covered by it as shown in Fig. 3a. Various dielectric media are mentioned.
Patent GB-1398704-A (GB)
Title: Process for producing trifluoroacetyl chloride
IPC: C07C53/48
Filed: 1974-02-14
Abstract: 1398704 Trifluoroacetyl chloride HALOCARBON PRODUCTS CORP 14 Feb 1974 [20 April 1973] 6805/74 Heading C2C Trifluoroacetyl chloride is prepared by reacting CF 3 CHCl 2 , containing less than 0À1% by weight of water, with O 2  in the gaseous phase at a temperature of up to 250‹ C. under exposure of actinic radiation. The process is preferably conducted in a continuous manner with an average residence time of the gas phase in the reaction vessel of 0À1-1 hour. Preferably 50- 200% of the stoichiometric amount of O 2  is used at 50-150‹ C. and at least 50 psig pressure. Under the most preferred conditions 90-135% of the stoichiometric amount of O 2  are continuously supplied with CF 3 CHCl 2 , and CF 3 COCl is continuously removed, with an average residence time of 0À15-0À5 hours, the vessel temperature being 75-125‹ C. and pressure at least 75 psig, the CF 3 CHCl 2  containing less than 0À01% by weight of water.
Patent GB-1166542-A (GB)
Title: Improvements in or relating to Character Recognition Systems
Inventor: SARAGA PETER
IPC: G06V30/10
Filed: 1967-02-13
Abstract: 1,166,542. Character recognition. MULLARD Ltd. 29 March, 1968 [13 Feb., 1967], No. 6873/67. Heading G4R. A character thinning system applies two intersecting raster scans to a character to find points lying substantially at the centre of character strokes or parts. A character, stored as a digitized matrix, is scanned in a horizontal and in a vertical raster, the raster pitches being comparable to stroke width so that scanned rows and columns of the matrix are separated by a number of unscanned rows and columns. During each scan, the co-ordinates of the centre point of each series of four or more consecutive black (character) points are noted (an isolated white point being treated as black). Any two centre-points, one from the vertical raster and one from the horizontal, which are too close together are next replaced by a new centre point midway between them. All surviving centre points are now joined by straight line segments by starting at one centre point, finding the two remaining centre points nearest to it and the two nearest to each of the latter (excluding the last two already used) and constructing all segments between these points which are " compatible " with the character i.e. do not pass through more than two consecutive white points. The straightest two-segment line found is extended by successive application of the " two nearest points " technique and segment construction, priority being given to branches which are closest to the original direction. When such a branch ends, other branches are extended in a similar way until all compatible segments between centre points have been constructed to form a line-thinned character (consisting of the segments) which is used for recognition and is also displayed together with the original character. The above algorithm is executed by suitably programming a computer. Line ends, junctions and loops detected during the thinning are retained for use in the recognition. As a modification, the character may be undigitized, the centre points being obtained as minima, but the centre points are then processed digitally as above.
Patent GB-962784-A (GB)
Title: Improvements in heat operated relays
IPC: G01K5/62
Filed: 1963-02-20
Abstract: 962,784. Thermal switches. WORMALD BROS. INDUSTRIES Ltd. Feb. 20, 1963 [March 22, 1962], No. 6899/63. Heading H2B. A fire detector switch of the type comprising contacts controlled respectively by two temperature responsive elements one of which responds more rapidly than the other is provided with a preset stop in the path of the former such that only very rapid rates of temperature rise can cause the contacts to engage. A fixed contact is provided for engagement when an absolute maximum temperature is reached. Spiral bimetal elements 6 and 7 are mounted by their inner ends adjustably carried on brackets 22 and 9 secured to a base 1. These brackets also carry pivots for rotatable arms 16 and 29 having pins at their ends to which the outer ends of spirals 7 and 6 are attached and which constitute contacts 17 and 31. The pivots for arms 16 and 29 also support an insulating disc 8 which acts as a heat reflector between the spirals 6 and 7 and is further supported by a wire 37 extending from bracket 22 and bent to form a fixed contact lying in the path of moving contact 17. A thin metal cup-like cover (Fig. 1, not shown) is a push fit in base 1 and mounting lugs 2 and 3 also act as terminals connected respectively to contact 17 and to contacts 31 and 37. A further bracket 40, bent to form a stop 39 in the path of contact 31, is adjustably clamped to base 1. The contact 31 catches up with, and engages, contact 17 if the temperature rises rapidly enough for this to occur before contact 31 encounters stop 39. In the event of a slow but excessive rise in temperature contact 17 will eventually engage contact 37.
Patent GB-609101-A (GB)
Title: Improvements in devices for repairing runs in hosiery articles
IPC: D04B17/04
Filed: 1946-03-06
Abstract: 609,101. Hand sewing-tools. FUERY. G. T. (Etablissements- Vitoux). March .6.. 1946, No. 6918. [Class 112] A re-looping device having a cylindrical body 1 provided with finger grips 8, and a piston secured to a needle 4 and reciprocated by combined pneumatic and spring pressure, is characterized by the needle guide bush 5 being rotatable to allow angular adjustment of the needle stem 3. The needle stem, which may be the piston rod of a leather cup piston, is polygonal in cross-section to co-operate with a like bore in the bush. Slits 7 in the body ensure a resilient grip on the impregnated fibre or plastic bush. The spring pressure is adjusted by varying the number of washers 14.
Patent GB-738322-A (GB)
Title: Production of thermoplastic compositions
Inventor: GRIFFITHS LESLIE HERBERT
IPC: C08L95/00
Filed: 1953-03-13
Abstract: A thermoplastic composition comprises a mixture of coal tar with 40-60 per cent of its weight of a polyvinyl compound of general formula, CH2 = CHR where R is a halogen atom or an aryl or aliphatic acyl radical, e.g. polystyrene, polyvinyl chloride or acetate, polyvinyl chloride-acetate copolymers and polyvinyl acetal.  The finely divided resin may be stirred into heated tar, or incorporated by milling, or monomers or partially polymerized monomers may be admixed with the tar and subsequently polymerized in the presence of a catalyst.  Aqueous dispersions may be prepared.  The composition may be used as a jointing material and solid fillers e.g. granulated cork may be added.  A composition suitable for vertical joints includes a dialkyl phthalate and hydrated lime.
Patent GB-1123132-A (GB)
Title: Device for dressing hair
Inventor: HANTMAN LIONEL LOUIS
IPC: A45D24/00
Filed: 1967-02-14
Abstract: 1,123,132. Oscillating comb. GILLETTE CO. 14 Feb., 1967 [14 Feb., 1966], No. 7091/67. Heading A4V. A device for dressing hair, Fig. 1, comprises a comb 10 having at least one row of teeth extending from a longitudinal spine and a means for rapidly oscillating the comb angularly about a longitudinal axis situated either in the spine or between the spine and the ends of the teeth. Suitably the comb comprises at least two rows of teeth extending divergently from the spine 56, each pair of opposing teeth in adjacent rows lying in a plane perpendicular to the spine. Each tooth can be wider adjacent its free end than adjacent its root and can have an arcuate end, see Figs. 11 and 12. Suitably the oscillations of the device have an amplitude of from 5 degrees to 150 degrees and a frequency of from 100 to 4,000 cycles per minute. The comb is suitably removably mounted and the device can be used for back-combing hair and untangling bouffant hair styles.
Patent GB-196255-A (GB)
Title: Improved screw press or oil wringer
IPC: B30B9/12
Filed: 1923-03-12
Abstract: 196,255. Naamlooze Vennootschap Utrechtsche Machinefabriek Opgericht door F. Smulders. April 13, 1922, [Convention date]. Fats and fatty oils, extracting by pressure.- In a press of the type comprising an individually driven feeding screw 7, and a central shaft 1 carrying a plurality of screw sections 5 forcing the seed through a perforated chamber 4 having its outlet obstructed by an adjustable cone 13, the shaft is driven by a gear 2 outside the machine frame 17, and the conveyer 7 is loosely mounted on the other end of the shaft and is driven by a gear 20 outside the frame. In the press shown, the screw 7 is driven from a countershaft 24 by a pinion 26 and the gear 20, and the shaft 1 is driven from the countershaft 24 by a pinion 25 and gear 2. The oil drips to a container 23. The cone 13 is adjusted into and out of the chamber 21 by a nut 11 on a threaded sleeve 3 engaging a key 4 on the shaft 1. The nut is provided with a toothed rim 12 engaging a gear 29 on a shaft 28 driven as required from the gear 2 by a loose pinion 30 and a slidable clutch 31. The screw 7 has a bearing portion 13 which is wider than the thread to facilitate removal at the right-hand end when the nut 10 and looking ring 8 are removed. The shaft 1 and supported parts may be removed through an opening 16 in the frame at the same time. The Specification as open to inspection under Sect. 91 (3) (a) comprises also making the rim 12 as a slip coupling. This subject-matter does not appear in the Specification as accepted.
Patent GB-429307-A (GB)
Title: Improvements in and relating to electrodynamic vibratory devices such as microphones
IPC: H04R9/08
Filed: 1934-03-06
Abstract: 429,307. Microphones and soundreproducing devices. ALEXANDER, F. W., 62, Lessar Avenue, Clapham Common, London. March 6, 1934, No. 7162. [Class 40 (iv)] In an instrument in which a thin conducting strip or sheet vibrates freely between polepieces of dimensons such that the acoustic response is reduced by the diffracted wave acting upon the back of the strip or sheet at frequencies in the upper third of the range for which the instrument is designed, this reduction is counteracted by cavity resonance. In the form shown, a corrugated aluminium strip 3 is mounted between the L-shaped polepieces 2 of the magnet 1, and the length of path from front to back of the strip around the polepieces is such that the acoustic response falls off at frequencies of 4000-5000. The polepieces are tapered as shown in plan in Fig. 2, so as to provide cavities 12, 13 broadly resonant over a large part of the range 4000-9000. Dimensions are given in the Specification. The cavities may be of different shapes and dimensions or one cavity only may be provided. As shown, the ends of the strip 3 are mounted in clamps 4 on the polepieces connected one by a single lead 9, and the other by two symmetrical leads 10, 11 to the primary winding of a transformer 8 mounted on a bracket 17 bolted to the magnet 1. The magnet is pivotally mounted at 19 in a fork 18 which is pivoted on a vertical spindle 23 supported on rubber washers in a head 21 which can be suspended by lugs 25 or mounted in a stand by means of the extension 26. The microphone is shielded electrostatically and against air pressure by screens 14, 16, 161 of perforated zinc lined or covered with silk. In modifications, Figs. 4-7, (not shown), the polepieces are secured to a ring magnet or to the slotted arms of a horizontal U-magnet provided with a perforated zinc casing which is mounted on rubber blocks in a similar outer casing lined with silk.
Patent GB-199094-A (GB)
Title: Improvements in or relating to steering gear for mechanically propelled vehicles
IPC: B62D3/02
Filed: 1922-03-10
Abstract: 199,094. Marles Steering Go., Ltd., and Egerton, H. W. March 10, 1922. Non-reactive steering-mechanism. - Cam-androller steering-gear having ball-thrust bearings is provided with additional means comprising oneway frictional bearing devices, which, whilst not interfering with the normal easy operation of the gear will resist any tendency of the gear to reversal. The steering-shaft c<2> is provided with a cam c operating a disc or roller a carried by a rocker shaft b. The end thrust of the cam is normally transmitted through rings f, f<1> to ballthrust bearings d, d'. Each ring f, f<1> can rotate freely in one direction only, rotation in the other direction being prevented by one-way clutches h carried by fixed rings k. The free directions of rotation of the rings f, f<1> are so arranged that when the steering shaft is rotated by its handwheel in either direction the cam bears against the ring which is free to rotate in that direction, while if, due to road shocks, the steering-arm b<1> tends to operate the cam in either direction, the cam is thrust against the ring which is locked for that direction. For heavy vehicles additional frictional surfaces are provided between the cam and the rings f, f<1>, comprising a ring of diamondshaped cross-section embedded in grooves in the cam and the rings. Specifications 25573/13, 169,011, 182,634, and 183,961 are referred to.
Patent GB-1488720-A (GB)
Title: Dry cleaning
IPC: D06F43/02
Filed: 1976-02-13
Abstract: 1488720 Dry cleaning NEIL & SPENCER Ltd 13 Feb 1976 [20 Feb 1975] 7217/75 Addition to 1379742 Heading D1A The drying and deodorising apparatus for a dry-cleaning machine disclosed in main Specification 1379742 is modified in that the water-cooled condenser 14 and the chamber with refrigerated surface 22 are disposed in parallel to each other in the air circuit, one or more adjustable dampers 30 determining the distribution of air flow between the two branches. The single damper 30 as shown is set in a vertical position during the drying phase; when the air becomes less saturated with solvent its temperature rises and a thermometer 32 switches the damper to horizontal position to pass the air over surface 22 for deodorising, the heater 16 also being switched off. Alternatively the damper(s) may not cut off the air flow completely to one or other of the branches and may have several settings or be progressively adjustable. The durations of the drying and deodorising phases may be in the ratio 3:2.
Patent GB-491882-A (GB)
Title: Improvements in or relating to the manufacture of composite wall board
IPC: D21J1/08
Filed: 1937-03-11
Abstract: Composite wall board is made by allowing to set, while in contact on both sides with liners of pulpboard, cardboard, &c., a wet plaster mix containing a water-soluble urea-aldehyde or thiourea-aldehyde condensation product, the formed board being subjected to a moderately elevated temperature to convert the condensation product into resin.  The plaster may be mixed with resin syrups containing 30-50 per cent of water.  Usually 1-10 per cent of syrup by weight of the final product is adequate but higher proportions, e.g. up to 80 per cent may be used to obtain boards having high wet-strength.  The molecular ratio of formaldehyde to urea is advantageously 1,5 : 1, but higher ratios, e.g. 3 : 1 may be employed; above 1,8 : 1 the resin may be condensed by heating the syrup under acid conditions, e.g. at a pH of 6,5, with or without removal of water.  Acid catalysts, e.g. sulphuric, hydrochloric and trichloracetic acids, and plaster accelerators and retarders may be added.  In examples: (1) 100 parts by weight of plaster is mixed with 8 parts sawdust, 55 parts water and 10 parts of a resin syrup obtained by stirring 60 parts urea into 122 parts of 40 per cent formaldehyde, if necessary with gentle heat; 0,035 parts of sulphuric acid are added during mixing and the mix is fabricated into boards with pulpboard facings in known manner, the board being dried in a continuous drier having an inlet temperature of 100-150 DEG  C. and an outlet temperature of 60-70 DEG  C.; (2) a resin syrup obtained by refluxing on a water bath for one hour 60 parts urea and 163 parts of 40 per cent formaldehyde, at pH 6,5, is similarly worked up; (3) a resin syrup containing urea and formaldehyde in molecular ratio 1,5 : 1 is made as in example (1) and is mixed with plaster and wood fibre and further worked up.  Specification 453,703 is referred to.
Patent GB-1041579-A (GB)
Title: Improvements in or relating to a device for applying liquid to travelling filaments
Inventor: DAVIES GERALD THOMAS
IPC: D06B1/00
Filed: 1964-02-20
Abstract: Apparatus applying liquid to twistless continuous filament yarns 2, 3, 4, 5 comprises a liquid containing tray 9, Fig. 1 (not shown), in which dip a set 8 of rotating rolls mounted on the same driving shaft, the rolls each having the same diameter but differing widths, appropriate yarn guides 10 direct each yarn so that it passes over the middle portion of one of the rolls and thence to winding cylinders 11, 12, 13, and 14.  The widths of the rolls are proportional to the amount of liquid it is desired to impart to the yarns in order that they each carry the same amount of liquid on reaching the wind-up means.  The rotating rolls may be made of glass, stainless steel or ceramic material and may be formed from one roll with peripheral grooves, Figs. 2 and 4 (not shown), or from separate cylindrical sleeves secured to and spaced apart on a driving shaft. One coil of yarn may be wound on each cylinder, Fig. 1 (not shown) or two or more coils may be an aqueous emulsion of a lubricating oil.
Patent GB-1235231-A (GB)
Title: Improvements in moulding devices
Inventor: ANTRAIGUE ROGER
IPC: B29C33/10
Filed: 1969-02-11
Abstract: 1,235,231. Moulding plastic materials; moulding tyres. R. ANTRAIGUE. 11 Feb., 1969 [5 March, 1968], No. 7279/69. Heading B5A. A mould for tyres comprises cavities 11 defined within webs 12 1 , 12 2 , and air vents in the form of slots 13 located transversely in the webs, each slot communicating with an opening 16 perpendicular to the cavity base leading via passage 17 to one or more outlets 19.