baber/WOPTO huggingface dataset:
Patent GB-687909-A (GB)
Title: Improved objectives for microscopes
IPC: G02B21/02
Filed: 1951-07-06
Abstract: 687,909. Microscope objectives. LEITZ GES., E. July 6, 1951 [July 26, 1950], No. 16111/51. Class 97 (i). A microscope objective comprises as the front lens a thick meniscus whose dispersing surface is curved to a greater extent than its collecting surface and whose thickness is greater than half the radius of the dispersing surface for providing a substantially plane image field, a collecting member having a dispersing cemented surface concave towards the object, and a negative lens on the image side of the said member, and at least one further positive lens, the collecting member and negative lens substantially correcting the astigmatism created by the thick meniscus. Other positive lenses may be included to remove the remaining image errors. Numerical data are given for two examples of the objective shown in Fig. 2, and for one in which the simple collecting lens between the front meniscus and the collecting member is omitted. Data are also given for one example of the objective shown in Fig. 5, and of one in which the triplet of Fig. 5 is replaced by a simple collecting lens. Specification 506,321 is referred to.
Patent GB-631011-A (GB)
Title: Improvements in or relating to muting switches for electric pick-ups for automatic record changing gramophones
IPC: G11B17/02
Filed: 1947-06-18
Abstract: 631,011. Automatic gramophones. DECCA RECORD CO., Ltd., BELLAMY, E., and COURTIS, A. W. June 18, 1947, No. 16140. (Class 40 (ii)] A switch for muting the electric pick-up during the operation of automatic recordchanging apparatus in a gramophone, is operated by a first member which is controlled by the action of the pick-up moving into the run-off groove, and is restored by a second member which controls the lowering of the pick-up and continues to move for a short time thereafter, so that the pick-up is rendered sensitive after it has been lowered. In Fig. 1, the switch contacts 24, 25, which may short-circuit the pick-up, are carried by an arm 13 which is pivotally mounted on the gramophone unit. An arm 30 carrying a stop member 20 is similarly mounted, the contacts being normally held apart due to the action of spring 21. Member 28 moves to the left when the pick-up enters the run-off groove, thereby rotating arm 13 so that the contacts move away from stop 20 and short-circuit the pick-up. A cam member 32 is arranged to move when the pick-up head is raised, which causes arm 30 to rotate, so that when member 28 returns to its normal position, contacts 24, 25 remain closed. After the pick-up has been lowered on to a record, cam 32 restores, and stop member 20 then returns to its normal position and separates contacts 24, 25 to energize the pick-up.
Patent GB-583477-A (GB)
Title: Improvements in or relating to the manufacture of phosgene
IPC: C01B32/80
Filed: 1943-10-04
Abstract: In the production of phosgene by reacting chlorine with carbon monoxide in the presence of a catalyst, the process is conducted under superatmospheric pressure.  Pressures of 20-300 say 150 pounds per square inch may be employed, and the temperature should be below 280 DEG C.  The catalyst may be an activated charcoal such as activated coconut charcoal.  The reaction may be conducted in water-cooled leadlined mild steel tubes.  Unlined steel tubes may be used at temperatures below 150 DEG C. Alternatively, the reaction zone may be an annulus packed with catalyst and cooled on both external and internal surfaces.  The reaction may be effected in two stages, the first at a temperature not exceeding 280 DEG C and the second at a temperature not exceeding 60 DEG C.  The carbon monoxide is preferably employed in slight excess and may be in the form of producer gas or derived from the reaction of oxygen with coke. Liquid phosgene may be recovered from the exit gas by cooling to -40 to -55 DEG C., the tail gases being freed from residual phosgene by charcoal absorption or washing with aqueous caustic alkali.
Patent GB-1458553-A (GB)
Title: Colour change indicator inks and coatings for sterilisation  processes
IPC: C09D11/00
Filed: 1974-04-11
Abstract: 1458553 Indicator inks JOHN DICKINSON & CO Ltd 11 April 1975 [11 April 1974] 16247/74 Headings C3P and C3F An indicator ink comprises a solution in an organic solvent of an acid-free resin binder containing a finely divided metallic carbonate which is capable of decomposing with a change of colour to the naked eye when heated in contact with steam under pressure but which is stable to dry heat at 120-145‹ C. Suitable carbonates are basic copper carbonate, bismuth oxycarbonate, cobalt carbonate, basic cobalt carbonate, ferrous carbonate, basic lead carbonate and manganese carbonate and exemplified resins are ethyl cellulose, polybutyl methacrylate and petroleum resin.
Patent GB-1077749-A (GB)
Title: Halogeno-alkyl phosphonates
Inventor: MURAY JAN
IPC: C08K5/5337
Filed: 1965-04-15
Abstract: Polymer compositions comprise a tri-alkyl phosphonate wherein chlorine and/or bromine substituents are present in at least that alkyl group which is directly bonded to phosphorus, which group also contains from 6 to 30 carbon atoms, together with a polymer derived from an ethylenically-unsaturated monomer.  The polymer may be a chlorine-containing polymer derived from a polymerizable vinyl compound, e.g. polyvinyl chloride, or may be a polymer of acrylic or methacrylic acid.  Examples are given of compositions of PVC with white lead, calcium stearate, dioctyl phthalate and haloalkyl phosphonate.ALSO:Tri-alkyl phosphonates wherein chlorine and/or bromine substituents are present in at least that alkyl group which is directly bonded to phosphorus, which group also contains from 6 to 30 carbon atoms, are prepared, e.g. by reaction of a phosphite ester with a halogenoalkane, followed if necessary by further halogenation. The preferred tri-alkyl phosphonates contain at least 10% by weight of chlorine, preferably 20% to 70%, and the alkyl group directly bonded to phosphorus preferably contains from 10 to 26 carbon atoms and may be either straight-chain or branched.  It is preferred to react the phosphite (preferably a tri-alkyl phosphite or tri-(halogeno-alkyl)phosphite) with an alkyl bromide or substituted alkyl bromide, generally at a temperature between 80 DEG  C. and 160 DEG  C. and under an inert atmosphere.  The phosphonates are useful as plasticizers and/or fire-retardants in polymer compositions.
Patent GB-1148941-A (GB)
Title: Improvement in or relating to filters
IPC: B01D46/52
Filed: 1966-04-13
Abstract: 1,148,941. Filter. PRECISION MECANIQUE LABINAL. 13 April, 1966 [13 April, 1965; 14 Dec., 1965], No. 16273/66. Heading B1D. [Also in Division D1] A fluid structure comprises a sheet, e.g. paper, concertinard - by substantially parallel back and forth folds, the folded sheet being coiled to cylindrical shape so that the folds be parallel to the axis of the cylinder such folds being corrugated in such a way that adjacent corrugations overlap one another both in the region of the inner surface of the cylinder, Fig. 10 and on the outer surface thereof, Fig. 11. A method of producing the above structure comprises corrugating a folded structure and reducing its height in a proportion 0.6 to 0.8 (e.g. as illustrated in Fig. 7) (not shown). In the filter structure, each corrugation may be chevron shaped with an apex angle 60‹-120‹ which penetrates the adjacent chevrons by at least “ of the chevron depth of the adjacent chevron, and the ratio of the external radius of the cylinder and internal radius may be about 5:3.
Patent GB-1128771-A (GB)
Title: Improvements in or relating to electrical control apparatus
Inventor: SEVENCO ALEXANDER JURA
IPC: B23K9/10
Filed: 1965-04-15
Abstract: 1,128,771. Magnetic amplifiers. LINCOLN ELECTRIC CO. Ltd. 21 Feb., 1966 [15 April, 1965], No. 16342/65. Heading H3B. [Also in Division H2] Control of current, e.g. for welding, from an alternating supply to a load is effected by at least one pair of transductors of the resetting type, the main windings of a transductor pair being alternately supplied with half-cycles of current, and the reset winding of each transductor being energized when the associated main winding is not carrying current, a main feedback winding being provided on each transductor which is energized by current passing to the load. A single transduotor pair is used in the single phase embodiment shown in Fig. 1, in which each transductor 16 has a main winding 17, a reset winding 18, a D.C. bias winding 19, a delay winding 20, main feedback windings 22, 23 and a reset feedback winding 21. Rectifiers 24, 25 in the main and reset winding circuits respectively provide the necessary half-cycle current through these windings and a unidirectional current output to a load. Three possible "voltage/load current" operating characteristics are obtained, depending on whether switch 31 is located in position A, B or C. In position A reset feedback windings 21 and main feedback windings 22 are connected in circuit and respectively augment and oppose the magnetization produced by the reset windings 18. In this position the switch also completes the circuit of delay windings 20 through a variable resistor 27 and so introduces delayed transient response. In position B feedback which aids the reset winding 18 is applied through main feedback windings 23, while in position C the reset feedback winding 21 opposes and the main feedback winding 23 aids the reset winding 18. A three-phase embodiment is described, Fig. 2 (not shown). A singlephase arrangement giving an A.C. output is also described, Fig. 5 (not shown), in which the two main windings 17 are connected in parallel. Because of oppositely directed rectifiers 24 an alternating output is produced at the load terminals. In all arrangements control of output current is obtained by a variable resistor 29 in the bias circuit.
Patent GB-203419-A (GB)
Title: A method of and apparatus for handling fragile substances in sheet form such as rubber in the uncured state during the final treatment
IPC: B29B7/64
Filed: 1922-06-14
Abstract: 203,419. Shaw, A. Herring-, Peachey Process Co., Ltd., and Bridge & Co., Ltd., D. June 14, 1922. Loading plastic sheets in tiers on carrying frames.-In the manufacture of sheets of fragile material, the sheets supported on carrier-cloths are loaded on to trays for further treatment. As applied to the production of large sheets of rubber vulcanized by the process described in Specification 129,826, [Class 70, India-rubber &c.], the plant comprises a carrier 1 consisting of a girder framework 2 and trays 3 on each of which is placed a cloth 44. For loading, the carrier 1 is run between frames carrying rolls 20, 21, 36. At the forward end, the frame consists of rods 8 on which is mounted a vertically adjustable carriage 10 carrying a rotatable disc 18 in which are mounted the rolls 20, 21 capable of being indepandently driven. At the rear of the carrier 1 is a vertically adjustable carriage 35 carrying a roll 36. For loading the carrier 1, a spare cloth z, Fig. 6, is wound on the roll 20, and short connecting cloths, p, q, r are attached to this cloth, and to cloths x, y on adjacent trays, passing round the roll 36, and attached to the roll 21. A sheet of rubber 42<a> from a calender 30 is led to the cloth z, and the roll 21 is rotated, winding the cloth y on to itself, drawing the cloth x on to the lower tray, and the cloth z carrying the rubber sheet on to the upper tray. The cloths are disconnected, the disc 18 is rotated to bring the roll 21 uppermost, the carriages 10 and 35 are lowered opposite the next pair of trays, and the operation is repeated until the carrier is full. It is then run into a vulcanizing chamber, and on to an unloading stage where each sheet is drawn from its tray by winding the cloth and sliding the sheet on to a platform, a spare cloth being drawn on to the tray from a roll at the front of the carrier.
Patent GB-799323-A (GB)
Title: Improvements in or relating to backward wave travelling wave tubes
IPC: H01J25/40
Filed: 1956-05-28
Abstract: 799,323. Travelling wave tubes. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. May 28, 1956 [June 10, 1955], No. 16474/56. Class 39(1). The interdigitated delay line of a backward wave travelling wave tube has the fingers of the two combs disposed wholly obliquely to the comb bases the fingers being less than #/4 Fsp in length the angle of obliqueness being the same for both combs. The tube used can be an O or M type amplifier or oscillator, the M type having crossed E and M fields and the O type not having crossed fields. The backward wave used is the fundamental. Loss material is provided for an amplifier on or in the field of the fingers, e.g., on a restricted central portion of all the fingers except the two end ones which are coupled to the input and output feeders, as indicated in Fig. 1 by area STVU or for an oscillator on the end remote from the outlet. The electron beam goes perpendicular to the line bases so that it is coupled successively with travelling wave components of opposite directions and is velocity modulated at say the odd gaps and gives up energy at say the even gaps. In the case of a backward wave oscillator energy is extracted at the right hand end 6. In a backward wave amplifier of O type, Figs. 2, 3 (not shown) the delay line bases are secured to the ends of a rectangular sectioned metal envelope. The envelope, gun anode and delay line are all at the same DC potential, and the sheet like beam propagates perpendicular to the length of the bases, as in Fig. 1. The collector is formed by an internally recessed part of the envelope, and a magnetic focussing field is produced between polepieces. In a backward wave oscillator of M type, Fig. 5, the role plate is insulated and supported from the envelope ends by blocks and has a slit for the cathode 9 which is associated with a positively biased focusing electrode 30. The beam moves horizontally in the plane of the paper at right angles to the transverse electric field and axial magnetic field (into the plane of the paper) produced by a coil. Since making the fingers oblique means that they can be longer for the same width (but their length must not exceed #/4) the delay line is especially suitable for wavelengths of 50 cm. or one metre.
Patent GB-549281-A (GB)
Title: Improved spark plug
IPC: H01T13/39
Filed: 1941-12-24
Abstract: 549,281. Nickel alloys. GENERAL MOTORS CORPORATION. Dec. 24, 1941, No. 16598. Convention date, Jan. 18. Drawings to Specification. [Class 82 (i)] [Also in Group XXVII] Parts of the electrodes of a sparking plug are made of an alloy consisting of 2 per cent. manganese, 3¢ per cent. chromium, .02 per cent. barium, and the balance nickel.
Patent GB-826381-A (GB)
Title: Method of continuously heating workpieces
IPC: B65G25/00
Filed: 1956-02-28
Abstract: 826,381. Step-by-step conveyers; roller conveyers. YORK ENGINEERING & CONSTRUCTION CO. Feb. 28, 1956 [March 3, 1955], No. 16752/59. Divided out of 826,380. Drawings to Specification. Class 78 (1). [Also in Group XII] The subject-matter of this Specification is substantially identical with that described in Specification 826,380, but the claims differ.
Patent GB-1138860-A (GB)
Title: Improvements in the bending of structural members
IPC: B21D7/08
Filed: 1966-04-16
Abstract: 1,138,860. Curving. R. G. SMITH. 16 April, 1966, No. 16775/66. Heading B3E. Apparatus for bending a length of structural member to a predetermined curvature without the use of heat and in a single pass comprises a base, two pairs of drive rolls between which said length may be passed, each pair of drive rolls being supported on said base for movement relative to one another such that the angle between the planes containing the axes of each pair of rolls can be adjusted and at least three angularly adjustable pairs of idler rolls positioned between said pairs of drive rolls. A structural member, e.g. of H, I or channel-section, to be curved passes through a driven pair of rolls of an assembly 12, through three pairs of idler rolls, then through a driven pair of rolls of an assembly 11, being bent to a parabolic shape between the assembly 12 and the first roller assembly and to the desired curvature between the last idler assembly and the assembly 11. The rollers of the assemblies 11, 12 are all driven at the same speed by a tensioned chain and intergearing, have serrated surfaces and may be grooved to accommodate flanges of the workpiece. One roller of each pair is adjustable towards the other and each assembly is angularly adjustable about the axis of one roll of its pair. The idler roll assemblies are additionally adjustable radially between guides 51. For use in bending H sections each idler assembly may carry guide rolls perpendicular to the idler rolls to engage the web of the section. To facilitate the insertion of an H section a triangular piece is cut out of the web and the flange bent against the free edge of the web to provide a tapered end, Figs. 11, 12 (not shown). A photo-electric cell may stop the drive to the machine when the bent end of the section interrupts the light beam. A saw is energized to cut off a predetermined length and the curving operation is restarted. Successive lengths of section may be welded together prior to curving.
Patent GB-994022-A (GB)
Title: Improvements in or relating to the production of catalytic materials
IPC: B01J37/00
Filed: 1962-05-02
Abstract: A method of forming a catalyst comprises maintaining a multiplicity of jets of hot gas passing upwardly into the bottom of a fluidizing zone having an inlet end and a discharge end, introducing pellets containing a metal hydroxide bound together with a metal acid phosphate into the inlet end of the fluidizing zone, the hot gas fluidizing the pellets and converting the metal acid phosphate to metal phosphate, the fluidized pellets progressively passing through the zone and discharging through the discharging end of the zone, maintaining a multiplicity of jets of a hot gas discharging upwardly into the bottom of a second fluidizing zone, introducing pellets passed through the first fluidizing zone into the second fluidizing zone, the hot gas in the second fluidizing zone fluidizing the pellets and forming a metal hydroxide-oxide mixture in the pellets, the fluidized pellets progressively passing through the second fluidizing zone and discharging through the discharge end thereof. Preferably the points of introduction of the jets in each fluidizing zone lie in a plane sloping downwardly away from the inlet end towards the discharge end of the zone.  The metal hydroxide metal acid phosphate pellets are aluminium trihydrate aluminium dihydrogen phosphate pellets.  Subsequently the pellets may be impregnated with the salt of another metal.  An example is given.
Patent GB-775804-A (GB)
Title: Cellulose ester compositions
IPC: C08L1/10
Filed: 1955-06-13
Abstract: Polyesters containing a plurality of tertiary amino groups are added to cellulose lower aliphatic ester spinning solutions, the cellulose ester having not more than 0.29 free hydroxyl groups per anhydroglucose unit of the cellulose, in order to increase the resistance to gasfading of dyeings produced on filamentary materials obtained from such solutions.  Suitable polyesters are those having the formula <FORM:0775804/IV(a)/1> wherein R is an alkyl or an aryl radical, R1 and R11 are alkylene radicals containing at least 2 carbon atoms, R111 is a saturated or unsaturated hydrocarbon radical containing up to 8 carbon atoms and n is an integer of at least 3. The polyesters are prepared by reacting a dicarboxylic acid or an anhydride, acid chloride or lower alkyl ester thereof with an alkyl dialkylolamine or an ester-forming derivative thereof, suitable dicarboxylic acids being malonic, succinic, glutaric, adipic, sebacic, maleic, fumaric, citraconic, phthalic, isophthalic, terephthalic and o-ethylphthalic acids and suitable alkyl-dialkylolamines being methyl-, ethyl-, butyl- and phenyl - diethanolamine, methyl-, ethyl- and phenyl-di-isopropanolamine, methyl- and ethyldi-gamma-propanolamine and ethyl isopropanol-ethanolamine.  In an example, the polyester is prepared from phthalic anhydride and ethyldiethanolamine.ALSO:The resistance to gas-fading of dyeings on textile materials of cellulose esters of lower aliphatic acids, containing not more than 0.29 free hydroxyl groups per anhydroglucose unit, is improved by treating the textiles before, during or after dyeing with a polyester containing a plurality of tertiary amino groups, if desired followed by heating. Suitable polyesters are those havthe formula <FORM:0775804/IV(b)/1> wherein R is an alkyl or an aryl radical, R1 and R11 are alkylene radicals containing at least two carbon atoms, R111 is a saturated or unsaturated hydrocarbon radical containing up to 8 carbon atoms and n is an integer of at least 3. The polyesters are prepared by reacting a dicarboxylic acid or an anhydride, acid chloride or lower alkyl ester thereof with an alkyl dialkylolamine or an ester-forming derivative thereof, suitable dicarboxylic acids being malonic, succinic, glutaric, adipic, sebacic, maleic, fumaric, citraconic, phthalic, isophthalic, terephthalic and o - ethylphthalic acids and suitable alkyl - dialkylolamines being methyl-, ethyl-, butyl- and phenyl - diethanolamines, methyl-, ethyl-, and phenyl di - isopropanolamine, methyl - and ethyl - phenyl-di-isopropanolamine, methyl- and ethyl-di-gamma-propanolamine and ethyl isopropanol ethanolamine. The polyester may be added to the cellulose ester spinning solution containing, for example, a mixture of methylene chloride and a lower alkanol as solvent, from which the filaments are spun.  Heating may be effected at 180 DEG -250 DEG C. by hot air, infra-red radiations, molten metal, dielectric heating or steam.
Patent GB-560705-A (GB)
Title: Improvements in and relating to guarding or protection devices for the rotating chucks or like parts of machine tools
IPC: B23Q11/08
Filed: 1942-11-30
Abstract: 560,705. Machinery guards. TELEPHONE MANUFACTURING CO., Ltd., and THRELFALL, D. C. Nov. 30,1942, No. 17021. [Class 80 (iv)] Consists in a guard for machine tools using chucks for holding drills or other rotating cutting tools. As applied to a drilling machine, the guard comprises an upper cylindrical part 1 and a lower part divided longitudinally to form shutter members 2, 3 which are hinged at 4, 4a about a rod 5 depending from an inturned flange at the lower end of the part 1. The shutters are kept normally closed by a coil spring 6. Opposite the rod 5 is a stop member in the form of a hook 7 adapted to be engaged by slots 8 in the members 2, 3 the opening of which is facilitated by a lug 9 on the free edge of the member 3. The part 1 is mounted on the feed rack sleeve of the drill by means of a split collar 10, Fig. 4, to which it is secured by screws 11. Thus the guard does not rotate and does not move axially relatively to the chuck. The shutters 2, 3 are mainly of halfcylindrical form with their lower ends of frustoconical shape. The guard may also be applied to lathes or other machines having a horizontal spindle carrying a chuck, the part 1 of the guard being modified for attachment to the spindle bearing.
Patent GB-853006-A (GB)
Title: Improvements in or relating to phosphors
Inventor: MEYER HERBERT
IPC: C09K11/71
Filed: 1958-05-28
Abstract: 853,006. Luminescent materials. DERBY LUMINESCENTS Ltd. July 27, 1959 [May 28, 1958], No. 17032/58. Class 39(1). A phosphor comprises a compound of the formula x CaO, y MgO, z BaO, 8 SiO 2 , P 2 O 5 , p TiO 2  where x + y + z = 10, x is from 2 to 10, y is from 0 to 6, z is from 0 to 4 and p is from 0À1 to 1 preferably 0À6. The starting materials which may comprise the carbonates are heated in the presence of a flux such as magnesium and or calcium chloride to a temperature of from 1075 to 1175‹C. Examples are given of the processing of 5 CaO, 3 MgO, 2BaO, 8 SiO 2 , P 2 O 5 , 0À6 TiO 2 , 7 CaO, 3 MgO, 8 SiO 2 , P 2 O 5 , 0À6 TiO 2 , 10 CaO, 8 SiO 2 , P 2 O 5 , 0À6 TiO 2  and 8 CaO, 2 BaO, 8 SiO 2 , P 2 O 5 , 0À6 TiO 2 . Specifications 612,085 and 678,596 are referred to.