baber/WOPTO huggingface dataset:
Patent GB-395984-A (GB)
Title: Improvements in or relating to photographic printing and enlarging
IPC: G03B27/32
Filed: 1933-02-17
Abstract: 395,984. Photographic enlarging- apparatus. PIRMOV, P. S., 28, Boylston Street, Cambridge, Massachusetts, U.S.A.- (Assignee of Rodman, J. ; 5, River Street, Dorchester, Boston, U.S.A.) Feb. 17, 1933, No. 4964. Convention date, Nov. 3, 1932. [Class 98 (i).] A photographic printing and enlarging apparatus comprises a transparent flat support against which a negative may be placed and illuminated, and a hood carrying an enlarg. ing lens normally out of engagement with the support but adapted to be moved thereover to confine light passing through the negative and lens so that an image of the negative may be projected on to sensitized paper. As shown, a work table 11 supported on posts 10 has an opening 12 above which is a transparent support 15 carrying a film 18 and a mask. Below the opening 12 is a box 13 carrying a lamp 14, which may be provided with condenser lenses, and whose current supply from the source 42 is taken through a resistance 43 when the treadle 38 is up, the resistance being cut out on depression of the treadle. A clamp plate 32 hinged at 33 is connected by a link 34 and bell-crank lever 35 to a rod 36 connected to the treadle 38. A hood 27 carrying an enlarging lens 29 is hinged at 30 and connected by a similar link and bell-crank lever to the rod 36. Depression of the treadle 38 simultaneously effects brightening of the lamp 14, engagement of the hood 27 over the film 18, and clamping of the sensitized paper 31 against the window 25 by the plate 32. The connection of the upper bell-crank lever 35 to the rod 36 is by collars 37 which are adjustable to permit of vertical adjustment of the table 21 carrying the sensitized paper.
Patent GB-475571-A (GB)
Title: Improvements in electric water heaters
IPC: F24H1/10
Filed: 1936-02-19
Abstract: 475,571. Electric water - heaters. GALIN, G. Feb. 19, 1936, Nos. 4986 and 4987. Void. Convention dates, Feb. 20, 1935 and Feb. 18, 1936. [Class 39 (iii)] An electric water-heater comprises a chamber g provided with an air inlet valve p and containing electrodes k which pass a heating current through the water, a water inlet being provided at the bottom of the chamber and an outlet tube h extending up the centre. The electrodes may be composed of discs threaded on rods i and spaced by insulating collars n. Alternatively the electrodes may comprise vertically suspended strips of metal. A filter o is provided.
Patent GB-719950-A (GB)
Title: Improvements in or relating to the manufacture of fluorine-containing polymers
IPC: C08F14/18
Filed: 1952-02-26
Abstract: Fluorine-containing polymers (except the homopolymer of tetrafluoethylene) are made by polymerizing a substituted ethylene having at least two fluorine atoms in the presence of an aqueous suspension medium containing a water-soluble salt of a peracid as a promoter, a water-soluble reducing agent as an activator and an inorganic water-soluble salt which in its oxidized state is more readily reducible than the promoter and in its reduced state is more readily oxidizable than the activator.  Specified fluorine-containing polymers are trifluorochloroethylene, perflurobutadiene, perfluoropropene, phenyl-trifluoroethylene, alpha-methyl-phenyl-difluoroethylene, perfluoroacrylonitrile, perfluorostyrene, perfluorocyclobutene, perfluorocyclobutadiene, vinyl fluoride, trifluoroethylene and difluorodichloroethylene, and their copolymers with each other or with tetrafluoroethylene, vinyl chloride and vinylidene chloride.  Specified peracids are the sodium, potassium, calcium, barium and ammonium salts of persulphuric and perphosphoric acids: specified activators are sodium bisulphate, hydrosulphite, thiosulphate and trimethylamine and specified salts are the hydroxides, carbonates, sulphates, phosphates, nitrates and chlorides of cobalt, silver, copper, nickel, molybdenum, iodine and, preferably, iron, manganese and chromium.  Suitable concentrations of promoter, and of activator, lies within the range 0.003 molar to 0.1 molar, while the concentration of inorganic salt is preferably maintained between 5 and 300 p.p.m. in the aqueous phase during the polymerization. The polymerization may take place in either a batchwise or continuous manner preferably using buffering agents such as borax, disodium phosphate, sodium carbonate, ammonium carbonate, sodium acetate, acetic acid, propionic acid and monosodium phosphate to produce optimum pH conditions.  Fillers such as titanium oxide, carbon black, clays, asbestos, and glass fibre may be added before polymerization.  The polymerization vessel may be made of or lined with, stainless steel, "Insonel" (R.T.M.), "Monel" (R.T.M.), silver, nickel, glass or fluorinated solid polymers.
Patent GB-1000732-A (GB)
Title: Improved means for connecting mine roof bars transversely to one another
IPC: E21D17/04
Filed: 1962-02-09
Abstract: 1,000,732. Clamps for mine roof support bars; clamp fastenings. RHEINSTAHL WANHEIM G.m.b.H. Feb. 9, 1962 [Feb. 11, 1961], No. 5058/62. Headings E1E and E2B. A cantilever roof bar 22 is connected to a transverse roof bar 8 by a connecting element having opposed jaws 29, 31 for receiving the bar 8 and a pivoted tongue and fork connection for the bar 22. The jaw 29 is adjustably mounted on a screw-threaded extension 27, 28 of the connecting element and is actuated by a nut 30. Specification 1,000,733 is referred to.
Patent GB-866347-A (GB)
Title: Improvements in x-ray sensitive image devices
IPC: H01J31/50
Filed: 1960-02-12
Abstract: 866,347. Cathode-ray tubes. RAULAND CORPORATION. Feb. 12, 1960 [Feb. 16, 1959], No. 5075/60. Drawings to Specification. Class 39(1). In an X-ray sensitive cathode-ray tube in which the X-rays enter the envelope through a window to impinge upon a target on which an electron image is developed, the thickness of the window varies as an inverse function of distance measured radially from the tube axis so as to provide a substantially constant path length for radiation incident thereon from an external source dispersed on the axis. The tube may be an image converter of the kind described in Specification 839,681 or may be an X-ray sensitive pick-up tube wherein the target is scanned to derive video signals.
Patent GB-325104-A (GB)
Title: Improvements in or relating to the parti-colour dyeing of yarns, threads, and woven fabrics
IPC: D06B11/00
Filed: 1929-02-15
Abstract: 325,104. Howard, S., Bailey, A., and Multi-Color Dyers (1920), Ltd. Feb. 15, 1929. Applying liquids to parts only of materials; passing fluids through materials on perforated tubes; vats, construction of. - Apparatus for the parti-colour dyeing of textile materials wound on a perforated tube 20 connected to suction at 39, comprises also a receptacle, preferably formed of two separable vertical parts 2, 2<a> which is subdivided by vertical blades 28 of rubber &c. which contact in a liquid-tight manner with discs 22 on the tube 20, with the materials 24, and with the base 29 of the receptacle. The parts 2, 2<a> of the receptacle are separated and closed by a hand-wheel 12 and gearing 16, 17, 18, 6, a liquid-tight connection being obtained by beads 9 on one part entering rubbered grooves in the other part. The lower disc 22 on the tube 20 seals the base of the receptacle, and the lower end of the tube 20 is seated on a rubber ring 32 surrounding the inlet of the exhaust chamber 34, being clamped thereon by means 35, 38. A drainage valve 40 on the exhaust chamber 34 automatically opens when the liquor therein exceeds a predetermined amount. The upper edge of the container is recessed as at 42 to prevent mixing of the overflows of the dyes from the different compartments 30. When the receptacle is in one piece, the vertical blades are moved into engagement with the yarn by a ring having grooves into which pins on the blades project.
Patent GB-804730-A (GB)
Title: Improvements in or relating to copying apparatus for lathes
IPC: B23Q35/46
Filed: 1957-02-04
Abstract: 804,730. Copy-turning. MASCHERPA, A. Feb. 14, 1957 [March 2, 1956], No. 5130/57. Class 83 (3). A pattern-carrying device for copying-lathes comprises two centres, one centre being mounted in a supporting head manually adjustable axially while the other centre is mounted in a second supporting head for axial movement therein, such movement being resisted by two springs, one of which is weaker than the other and comes into action first, the movement of the second, stronger, spring being indicated on a dial. The pattern 3, Fig. 1, is held between centres 4, 5, the former of which has the usual axial adjustment means operated by a worm 11 and wheel 12. The adjusting hand wheel 9, Fig. 2, is carried by a long support 10 so that it may be convenient to the operator at the front of the machine. The other centre 5 is slidable in a member 7 and pressed forwards to engage the pattern by a light spring 6. The member 7 is also slidable in the head 1 and has rack teeth engaged by a pinion 16. The latter is mounted on a shaft 18, Fig. 3, which carries an indicator 21 at one end and a spiral watch-type spring 17 at the other end. This spring is stronger than spring 6 so that the latter is first compressed, before the former comes into operation and indications of axial movement shown.
Patent GB-1445924-A (GB)
Title: Electrical circuit breaking device
IPC: H01H85/143
Filed: 1974-02-04
Abstract: 1445924 Fuse SIEMENS AG 4 Feb 1974 [5 Feb 1973 12 Nov 1973] 05143/74 Heading H2G A fuse device where, on the melting of a fusible link an arc is formed which is magnetically distorted and hence quenched, comprises a fusible link 2 joining the bottom of two horn electrodes 5, 6 said link being within a narrow arc-quenching inner chamber which in turn is surrounded by an outer chamber, at least one wall of both chambers being pierced by holes. In the embodiment shown the top wall 46 of the outer chamber has through bores 38 and there exists a channel of width a between the inner and outer chamber. The magnetic effect of the current loop between connectors 14, 18 is enhanced by slots 20, 21. The inner chamber is defined by electrodes 5, 6 and walls 30, 31, 40, 41 and 32 and an insert 54 the insert being partly or wholly of readily gasifiable material. The width d is not substantially greater than the diameter of the fuse link. The inner chamber walls may be of ceramics, slate or flaky asbestos or mica-containing plastics. The bore holes 34-37 and 39 make up between 30-50% of the total area of the inner chamber. Walls 40, 41 may be provided with recesses containing inserts 60, 62 of readily gasiflable material. Alternatively, the walls 40, 41 may be partly or wholly coated such material which comprises halogen-containing epoxy resins, melamine resins and polyhydromethylene and other suitable plastics. Dimensional ranges for the holes (which need not be round), wall thicknesses, and the fusible link are given in the Specification for various operating ranges. Electrodes 5, 6 and connectors 16, 18 are of high conductivity material such as copper.
Patent GB-856322-A (GB)
Title: Improvements in and relating to the manufacture of pentaerythritol
Inventor: CARPENTIER RAYMOND
IPC: C07C31/24
Filed: 1959-02-13
Abstract: Formic acid is extracted from a pentaerythritol solution, obtained by reacting acetaldehyde with formaldehyde, by treating it with a homogeneous mixture containing tributyl phosphate and at least one other organic solvent having a solubility in water of less than 2% by weight and a relative density greater than 1,1 or less than 0,9, the tributyl phosphate and the other organic solvent(s) being mutually soluable.  Preferably the extraction mixture contains one part by weight of tributyl phosphate to 0,2-3 parts of other organic solvents.  Generally the extraction is carried out using solutions at a temperature of 15-30 DEG C.  Suitable organic solvents for use with the tributyl phosophate are hydrocarbons, halogenated or nitrated hydrocarbons, ethers and alcohols.  The extraction may be carried out continuosly or otherwise and may be carried out on solutions which have been subjected to concentration followed by crystallisation of pentaerythritol.  The formic acid in the organic solvent mixtures may be recovered by distillation, esterification or precipitation or the acid in the mixture may be converted into a salt by treating the mixture with an alkaline agent in aqueous solution, e.g. sodium carbonate or sodium hydroxide.
Patent GB-712510-A (GB)
Title: Escutcheon fixing means
IPC: F16B5/06
Filed: 1952-02-28
Abstract: 712,510. Radio receivers. COLE, Ltd., E. K. and WILSON, F. C. March 2, 1953 [Feb. 28, 1952], No. 5218/52. Class 40 (5). [Also in Group XXV] An escutcheon C of plastic material surrounding an opening in a panel A is secured by means of a number of spring clips K which are arranged to bear on the back of the panel and on lugs H formed on the part of the escutcheon projecting through the opening. The clips may be located in recesses J at the back of the panel. In the modification shown in Fig. 4, the rear surface of the escutcheon wall has additional lugs L which are interposed between tongues M and N of clip K.
Patent GB-493491-A (GB)
Title: Improvements in semi-rotary compressors, pumps or the like
IPC: F04C9/00
Filed: 1938-02-19
Abstract: 493,491. Semi-rotary pumps. GRUNERT, K. Feb. 19, 1938, No. 5311. Convention date, Feb. 19, 1937. [Class 110 (ii)] A double - acting piston 3 is oscillated by means of an eccentric 6 fixed to a rotating shaft 7, and slides on a pivot 4. An inlet port 8 admits fluid to a space 5 and to passages 10 past valves 9 into working spaces 11, 12. The fluid is delivered past valves 14 into channels 15. Oil channels 17, 18, allow lubricant to flow to the sliding surfaces.
Patent GB-1454812-A (GB)
Title: Visual display of unrecognisable characters in an optical character recognition machine method and apparatus for recognising handwritten charaters in an optical character recognition machine
IPC: G06K9/03
Filed: 1974-02-05
Abstract: 1454812 Character recognition systems OPTICAL BUSINESS MACHINES Inc 5 Feb 1974 [7 June 1973] 05342/74 Heading G4R If a known character recognition system fails to recognize a scanned character, light from that character is deflected on to a viewing screen so that the character can be visually identified by an operator. In the arrangement shown, light from a laser 10 is directed by prism 12 and rotating mirror 14 on to a document 16 so that it scans over a row of characters. Light reflected from the document passes via the mirror 14 and lenses 13, 18 to photosensors 19 which feed recognition circuitry. If the circuitry fails to recognize a character, rotation of mirror 14 is stopped, a mirror 21 is moved into the light path between lens 18 and the photosensors 19, and a lamp 34 is energized. The image of a portion of the line of characters is directed by mirror 21 to lenses 29, 31 so that an enlarged image is displayed on screen 33. The mirror 14 will have stopped at such a position that the character to be identified by the operator appears between marks 37. A blocking filter 32 prevents all or most of the laser light from reaching the screen but allows light from lamp 34 to pass.
Patent GB-312127-A (GB)
Title: Improvements in regulators for dynamo electric machinery and other electric apparatus
IPC: H02P9/24
Filed: 1928-02-20
Abstract: 312,127. Newton, F. Feb. 20, 1928. Regulation, automatic. - Contact-operating regulators for dynamo-electric machines &c., applicable to the regulation of voltage, current, speed and power-factor, comprise a solenoid 2, Fig. 2, energized dependent on the quantity to be regulated and two vibratory reeds 4 including parallel magnetic members 5 lying lengthwise in the path of the flux, the reeds carrying normally abutting contacts 13 at their ends and having the same natural frequency, and their contacts the same amplitudes of vibration under an external impulse. The contacts 13 are carried by light springs 12 attached to the outer faces of the reeds 4. The flux necessary to separate the contacts 13 is varied by an adjustable member 11 forcing apart pivoted supports 7 for the reeds 4. The solenoid may be iron-clad. The contacts 13 may short-circuit a resistance in shunt or series to the field winding of a generator, or may control the circuit of a relay shorting the resistance or of an electromagnet increasing the pressure on a carbon-pile resistance. Two regulators in shunt and series to a charging circuit from a generator to a battery may together short an adjustable part of a resistance in series with the field winding of the generator so that this resistance part is introduced when either the current or the voltage rises. A single regulator may have two windings excited by separate quantities. A second winding 20, Fig. 5, on the regulator may be intermittently excited to ensure that the reeds vibrate continuously, the flux of the control winding 17 then varying the periods of contact. In a voltage regulator shorting a resistance 18 as shown, the time-constant of the winding 20 may be decreased by a condenser 22 shunted by a resistance 23. If the generator is an alternator, vibration of the reeds may be obtained without a second winding; a large non- inductive resistance may be arranged in series with the regulator-solenoid to diminish the effects of frequency changes. This resistance, and the solenoid itself in a direct-current regulator, has negligible temperature coefficient of resistance. The contacts 13 may be bridged by a condenser.
Patent GB-511543-A (GB)
Title: Improvements in and relating to apparatus for producing ground or polished glass strip
IPC: B24B7/24
Filed: 1938-02-22
Abstract: 511,543. Grinding and polishing glass. PILKINGTON BROS., Ltd., BAILLIE, G. H., and WALDRON, F. B. Feb. 22, 1938, No. 5577. [Class 60] [Also in Group XXIV] Apparatus for producing a continuous strip of glass ground, or ground and polished on both sides comprises a strip forming apparatus, a lehr, and grinding &c. apparatus, the strip being fed by rollers at a speed determined by the forming apparatus and the lehr. The rollers 3 for feeding the strips 1 be'tween the pairs of opposed grinding &c. tools 2, against the frictional resistance of the tools, are driven by devices exercising substantially constant torque on the rollers, a shaft 5 driven by a motor 4 serving to wind up the devices. The device shown in Fig. 2 comprises a sun wheel 8 secured to the shaft 6 of a roller 3 engaged by planet pinions 14 carried by a drum 15 freely rotatable on the shaft 6, the pinions also engaging an internal gear wheel 9 free to rotate on the shaft 6 and adapted to be driven by a worm 12 on a shaft 13. The worm shaft 13 may be driven through worm gearing 19, 20, a magnetic clutch 22, 23, and bevel gearing 25, 26 from the shaft 5, and in operation, the clutch is de-energized so that the drum 15 may be driven by a strap 18 thereon carrying a weight 17, which determines the torque applied to the roller. When the weight reaches its lowest limit, it operates a switch to energize the clutch the gear 9 then being so driven as to raise the weight slowly to its upper limit, when a switch de-energizes the clutch, allowing the weight again to fall. In a modification, the gearing is replaced by an endless chain and pulleys, the chain passing from a pulley on the shaft 6 round a pulley carrying a weight, thence round a pulley driven by worm gearing and round another pulley carrying a counterweight to take up slack. An electric motor drives the worm gearing at such a speed that the weight falls, actuating a switch at the bottom of its path to speed up the motor so as to raise the weight, when another switch is actuated to cause the weight to fall; in place of this drive, the drive described above in connection with Fig. 3 may be used. In a modified drive the single shaft 5 is replaced by two shafts, one driven too fast and the other too slowly, carrying gear wheels which may be clutched to the respective shafts by magnetic clutches; or one shaft with two sets of gearing having different ratios and a double magnetic clutch may be used. Fig. 8 shows a spring 59 substituted for the weight 17 of Fig. 2, the lower end being fixed at 60 and the upper end carrying a pulley 61 round which passes a tape 18 from the drum 15, the tape being fixed at 62; the weights may act through gearing. Both rollers 3 of each pair, or one only may be driven as described above.
Patent GB-414594-A (GB)
Title: Collapsing mudguards for a velocipede
IPC: B62J15/00
Filed: 1934-02-20
Abstract: 414,594. Cycle mudguards. PACILEO,G., 165, Stockwell Gardens, Clapham Road, London. Feb. 20, 1934, No. 5584. [Class 136 (i).] Front and rear cycle mudguards of the telescopically collapsable type are formed of a number of metal, celluloid &c. sections C, D, E ... , Fig. 2, of tapered form, adapted to be extended until contact is made between the larger and smaller tapered surfaces of adjacent sections. The guard is held in the collapsed position, Fig. 1, by a rubber-covered spring M connected at one to a bracket O<1> on the largest section F, and adapted to be connected at the other end either to a second bracket O on such section or to a fixed bracket G on the fork. A pair of stays B are pivoted to fittings on the section F and on the fork, and are held in the lowered or extended position by means of a stop roller on a fitting adapted to slide along a slotted plate W and to be fixed by a wing-nut A, wing-nuts being also provided to clamp the pivots of the stays B. A modified form for use with the rear wheel is constructed in two collapsable portions adapted to be extended in opposite directions from a section fixed on the upper rear fork.
Patent GB-633317-A (GB)
Title: Improvements in or relating to adjustable drawing boards or tables
IPC: A47B27/18
Filed: 1948-02-25
Abstract: 633,317. Adjustable drawing-tables. LEBEAU, G. Feb. 25, 1948, No 5609. Convention date, Feb. 25, 1947. [Class 52 (iii)] A drawing board T is mounted on parallelogram linkages, the arms 2 or both 2 and 3, of which can be selectively released by a single locking member to adjust the height, or both the height and slope, of the board. The arms 2 are connected by tube 12 to a central toothed sector 11 and arms 3 are each connected to similar side sectors 10 by sleeves 3b. The sectors 10 and 11 are engaged by a spring-urged locking member 13, Fig. 4, which may be withdrawn from engagement by the pedal 16 acting through a rod 15. The sector 11 has short teeth and is freed on partial depression of pedal 16 to the stop 17, while on full depression to the stop 18 all sectors are released.
Patent GB-512980-A (GB)
Title: Improvements in or relating to the scavenging of the cylinders of two-stroke-cycle internal combustion engines
IPC: F02B25/00
Filed: 1938-02-23
Abstract: 512,980. Cylinders. SCOTT MOTORS (SALTAIRE), Ltd., and CULL, W. Feb. 23, 1938, No. 5656. [Class 7 (ii)] In a two-stroke engine cylinder having a piston with a conical head 2, a pair of opposed admission ports 7, which have leads 8 so as to be opened progressively by the piston, are supplied by transfer passages directed to the side of the cylinder, opposed to the exhaust ports 4, where a third admission port 5 is situated. The leads 8 may be either on the ports themselves or on the piston. The transfer passages behind the ports 5, 7 are steeply inclined upwards, that behind the port 5 being restricted at 10, and inclined at twice the inclination of the other ports, which may be that of the piston head.