baber/WOPTO huggingface dataset:
Patent GB-639731-A (GB)
Title: Wave-signal amplitude-limiting system
IPC: H03G11/06
Filed: 1947-08-08
Abstract: 639,731. Radio receiving circuits. HAZELTINE CORPORATION. Aug. 8, 1947, No. 22001. Convention date, Aug. 27, 1946. [Class 40 (v)] A lirniter system 14, particularly for removing noise in the form of amplitude modulation from a frequency modulation receiver, is - interposed between the I.F. amplifier 13 and the frequency detector 15. The limiter comprises a resonant circuit 22, 24 having shunted across it a diode 25 in series with a large condenser 27 shunted by a resistance 28. The values are so chosen that peak rectification occurs to produce across condenser 27 a bias which. varies with the average value of the applied signal so as to vary the limiting level. Rapidly changing amplitude modulation above the limiting level is however limited. The bias across condenser 27 is used for A.V.C. purposes. The voltage across resonant circuit 22, 24 is amplified in valve 33 and is then subject to a further limiting process in a similar limiter 25<1>, 271, 28<1> which is set to a higher limiting level, and is coupled to the input of the frequency detector 15. In a modification (Fig. 2, not shown), the diodes are replaced by germanium crystal rectifiers, and the rectifier circuit is inductively coupled effectively in parallel with the resonant circuit. The above arrangement facilitates tuning of a frequency-modulated receiver as the audible output increases as resonance is approached. Specification 632,392 is referred to.
Patent GB-915107-A (GB)
Title: Process for the production of í~-androstadiene-3.17-dione
IPC: C12P33/02
Filed: 1959-06-26
Abstract: D 1,4-Androstadiene-3,17-dione is prepared by oxidising a D 4-steroid of the pregnane or androstane series having keto groups in the 3,20 or 3,17-positions respectively with the fungi Fusarium caucasicum in the presence of a saturated allosteroid to inhibit enzymatic conversion of the resulting D 1,4-androstadiene-3,17-dione to 1,2-dehydrotestolactone. The saturated allosteroid may be of the pregnane or androstane series having keto groups in the 3,20 or 3,17 positions respectively.  There may also be present in the reaction mixture a saturated steroid of the 5b -pregnane or 5b -androstane series having keto groups in the 3,20 or 3,17-positions respectively. It is preferable to dilute the culture medium before the oxidation commences e.g. the culture medium may be diluted 20-fold. Suitable mixtures for use in the above process are progesterone and allopregnane-3,20-dione, D 4-androstene-3,17-dione and androstane-3,17-dione, D 4-androstene-3,17-dione and allopregnane-3,20-dione, and D 4-androstene-3,17-dione, androstane-3,17-dione and etiocholane - 3,17 - dione. Specification 792,803 is referred to.
Patent GB-240291-A (GB)
Title: Improvements in or relating to propellers for aircraft
IPC: B64C11/06
Filed: 1924-09-19
Abstract: 240,291. Napier & Son, Ltd., D., and Wilkinson, G. S. Sept. 19, 1924. Screw propellers.-In variable pitch air screws, each blade has a metal sleeve at its root with external splines which engage internal splines in a metal socket which is rotatably mounted in the hub and has its inner end of smaller diameter than the outer end, a nut locking the sleeve and socket together. The root of the blade A has a sleeve B riveted thereto, the sleeve having external splines B<3> and an upper conical face B'. The splines engage splines D<1> on a socket D which has an external thread carrying the locking nut E, the end E<1> being drawn up on to the conical face B<2>, and at the same time the root C is held firm against the conical shoulder D<3>. The socket has ball thrust bearings M and roller journal bearings J, J<1>, in conjunction with a member F which is rigidly held in the hub G' by the collar H screwed on to the flange G<2>. Plain bearings may be substituted for the rollers.
Patent GB-166593-A (GB)
Title: Improvements in or relating to, the construction and arrangement of railway and road vehicles and to draught, coupling, and buffing appliances therefor
IPC: B61G1/36
Filed: 1919-09-10
Abstract: 166,593. Wheat, H. A. Sept. 10, 1919. Sides.-The ends 64 of a vehicle suitable for light railways are tapered at their upper ends to prevent contact of adjacent vehicles when the level of the track changes abruptly.
Patent GB-294942-A (GB)
Title: Improvements in and relating to nails and an improved method of securing planks and the like
IPC: F16B15/02
Filed: 1928-08-01
Abstract: 294,942. R÷hrbein, R., and Kl³tmeier, H. Aug. 1, 1927, [Convention date]. Nails.-Planks are nailed down on beams e by nails a driven into the junctures of adjoining planks, the heads b of the nails being so formed as to enter and draw together both planks, and the shanks a being of angular cross-section so that they retain their position. A suitable nail comprises a head and shank in one piece, the head b being formed with undercut projections c and the shank a, which is thicker in the direction of the undercut projections c, being of rectangular cross-section.
Patent GB-915695-A (GB)
Title: Improvements in work-feeding devices in sewing machines
IPC: D05B27/02
Filed: 1960-06-24
Abstract: 915,695. Sewing-machines. FRATELLI BORLETTI S.p.A. June 24, 1960 [June 26, 1959], No. 22284/60. Class 112. A work-feeding device in a sewing-machine comprises a rockable feed drive member 24 fixed to a feed advance shaft 33, an intermediate member 26 pivoted at 25 to the feed drive member 25, a support member 31 which carries a feed dog 22 and one end of which is pivoted at 29 to one end of the intermediate member 26, and a rotary cam-shaft 8 carrying a first cam 9 engaging the intermediate member 26 on the side of pivot 25 remote from pivot 29, and a second cam 10 engaging the support member 31, the cams being adapted to push members 26 and 31 apart for raising the feed dog 21 and to allow members 26 and 31 to approach each other for lowering the feed dog. The arrangement is such that the feed dog remains horizontal during its movements. Shaft 8 may be moved axially to disengage the cams from the members 26 and 31 for immobilizing the feed.
Patent GB-958278-A (GB)
Title: Method of manufacture of glass fibres
IPC: C03C25/26
Filed: 1961-06-20
Abstract: Glass fibres are sized by applying to them an organosilane or its silanol derivative and an uncured thermosetting synthetic resin which is curable therewith, the proportion of the organo silane or derivative thereof being insufficient to cure all the resin, reacting the organosilane or derivative thereof with a portion of the resin to cure that portion to form a coating in contact with the glass surface leaving an uncured portion of the resin exteriorly adjacent to the inner cured coating, the resin being applied as an anhydrous solution in a non-aqueous solvent, e.g. acetone free diacetone alcohol, toluene, acetone, xylene, methylisobutyl ketone, trichloroethane, a "Cellosolve" (Registered Trade Mark) or a Cellusolve acetate. Suitable thermo setting resins are epoxy resins, polyester resins, acrylic resins, phenoplasts and aminoplasts.  The curing agent may be an organosilane or organosilanol prepared by the hydrolysis of a compound having the formula RnSiX4-n in which R is an unsaturated group or an amino group, e.g. the group H2N(CH2)x or H2N(CH2)x NH(CH2)x in which x is an integer from 1 to 4, X is a halogen atom or an alkoxy, alkyl, aryl or amino alkyl group and n an integer from 1 to 3.  The treating composition may also contain a lubricant, e.g. animal and vegetable oils, condensates of amines and fatty acids such as octadecyl amine acetate, the sodium salts of propianic acid and polyethylene glycols and their esters.  The composition may be applied to the fibres as they are being drawn and wound or a dual coating operation may be utilized in which the fibres are first treated with the organo silane or derivative thereof in an anhydrous solvent and are then treated with the resin also in an anhydrous solvent as they are drawn and wound.  Bundles of the fibres may be bonded together by subsequently treating them with a further coating of a thermo setting resin containing a heat activatable hardener and then heating.  Specifications 796,684, 824,223 and 824,224 are referred to.
Patent GB-140702-A (GB)
Title: Improvements in wire mesh globes and the method of producing the same
IPC: F21H1/00
Filed: 1919-09-11
Abstract: 140,702. Marks, E. C. R., (Safety Wire Gas Globe Co.). Sept. 11, 1919. Globes. - A wiremesh globe is formed by shaping a wire-netting blank to the required globular or other shape and then applying a coating having light diffusing properties and adapted to unite the intersecting strands of netting, which were disconnected during the shaping operation. The shaped article 1 is preferably dipped into coating-material having the general properties and consistency of paint, and the surplus material is removed by means of compressed air. The wire-netting blank may be shaped by means of a rotatable die structure, and its edge is provided with a ring 4.
Patent GB-405688-A (GB)
Title: Improvements in or relating to the separation of tramp or stray iron and the like impurities from bagasse and other materials of similar consistency
IPC: C13B10/06
Filed: 1932-08-11
Abstract: 405,688. Separating solid materials. MAXWELL, F., 334, Victoria Street, London. Aug. 11, 1932, No. 22510. [Class 117.] Apparatus for removing tramp or stray iron or other impurity from bagasse and other materials comprises means for loosening and scattering the materials and means for separately collecting the different constituents consisting of a screen 6 of glass, celluloid &c. which is penetrable by the iron &c. The screen preferably forms the front of a receptacle 7 which is pivoted at 8 and counterbalanced and may be adjustable on a slide 12 to different distances from the scattering device. In the apparatus shown, the bagasse &c. as it comes from a mill 3 is loosened and scattered by a rotating paddle wheel 5. In a modification, the scattering means consists of an air or steam jet.
Patent GB-460977-A (GB)
Title: Improved means for use in the measurement of low pressures
IPC: G01L11/00
Filed: 1935-08-09
Abstract: 460,977. Pressure - gauges. CALLENDER'S CABLE & CONSTRUCTION CO., Ltd., and VINCENT, R. S. Aug. 9, 1935, No. 22550. [Class 106 (ii)] An arrangement for measuring pressure of a gaseous fluid in a container 5 comprises two compressors or pumps 1, 2 of the positive displacement type connected to work in series which withdraw fluid from the container and have arranged between them a receiver 3 to which. is connected a pressure gauge 7. The ratio of the volumes swept per second by the compressors is maintained constant so that a definite relation exists between the pressure in the container and the pressure in the receiver. The delivery pipe 8 from the compressor 2 is preferably connected by a pipe to the intake 4 of the compressor 1, but may deliver to the atmosphere. The compressors and receiver may be placed in a bath of liquid 11 to avoid inaccuracies due to temperature and for sealing purposes. A chamber 12 serves to absorb vapour liable to condense.
Patent GB-660880-A (GB)
Title: Improvements in or connected with the transfer of materials
IPC: B65G67/00
Filed: 1949-08-31
Abstract: 660,880. Charging skips. ROBEY & CO., Ltd., and CROMPTON, A. Aug. 8, 1950. [Aug. 31, 1949] No. 22581/49. Class 78 (iv). Apparatus for transferring materials from a collecting receptacle to another receptacle includes a transfer chamber in the form of a hollow cube having a curved discharge mouth and a fitting opening in the lower part of the chamber movable in the apparatus, means to move the transfer chamber from its loading position so that the discharge mouth moves angularly until it is in line vertically with the receiving receptacle while the continued movement of the discharge mouth of the transfer chamber is vertically downwards to discharge the material into the receiving receptacle, and means for returning the transfer chamber to its filling position. A container 1 with discharge outlet 2 and filling opening 3 has a pair of levers 4 and 5 connected to the sides. A plate 7 is mounted on a fixed pivot 6 and has pivotally attached ends of the levers 4 and 5. A third pair of levers 9 is pivotally connected to the plate and to an arm 10. The container is discharged when the arm 10 strikes a skip 11, the container being guided during discharge by guides 14 and 15. The container is restored to its filling position by a counterweight 12 or by a pressure cylinder. The container may be otherwise tipped by the skip operating an electric contactor actuating means to tip the container. The skip is moved vertically by tracks 13. Instead of the plate 7 a system of levers may be used. During the transfer the discharge mouth 2 closely fits the bucket 11. An extractor fan or suction can be arranged to collect the dust during transfer.
Patent GB-986239-A (GB)
Title: Stabilization of polyvinyl chloride compositions
IPC: C07F9/142
Filed: 1963-06-06
Abstract: Monoalkyl phosphite salts of the formula <FORM:0986239/C2/1> wherein R is an alkyl radical and M is a cadmium, barium, calcium or zinc atom are obtained by reacting the corresponding alkali metal (e.g. sodium) monoalkyl phosphite with a suitable salt of the appropriate divalent metal, e.g. cadmium or zinc acetate dihydrate, calcium acetate monohydrate, barium chloride dihydrate or anhydrous cadmium acetate.  The alkyl groups R suitably contain 1 to 30 carbon atoms and preferably 1 to 12 carbon atoms. The alkali metal monoalkyl phosphate used as starting material may be obtained by reacting phosphorus trichloride with an alkanol corresponding to the alkyl group R or by reacting an appropriate dialkyl phosphite with sodium hydroxide to remove one alkyl group. Examples are given for the production of cadmium-, calcium-, zinc- and barium monolauryl phosphites, and cadmium monoethyl, monobutyl, and mono-2-ethylhexyl phosphites.  The products are useful as light stabilizers for polyvinyl chloride compositions (see Division C3).ALSO:Polyvinyl chloride compositions are stabilized by incorporating therein a stabilizing amount, e.g. 0.001% to about 10% by weight, of one or more monoalkyl phosphite salts of the formula: <FORM:0986239/C3/1> wherein R is alkyl and M is a Ba, Cd, Ca or Zn atom.  The polyvinyl chloride composition may be polyvinyl chloride or a copolymer derived from vinyl chloride and small amounts of other copolymerizable monomers.  Other stabilizers, e.g. metal salts of epoxy carboxylic acids or of simple aliphatic carboxylic acids (with or without epoxy compounds) may also be present in the composition and the latter may also include antioxidants, ultraviolet light absorbers, dyes, pigments, fillers, antistatic agents and plasticizers.  The radical R is preferably a C1-C12 alkyl radical.  In examples: (1) polyvinyl chloride is milled at 135 DEG  C. with dioctyl phthalate (as plasticizer) and calcium (cadmium, barium or zinc) monolauryl phosphite or cadmium monoethyl (or monobutyl) phosphite as stabilizer, (2) as in (1) except that the composition comprises polyvinyl chloride, barium laurate and cadmium monolauryl phosphite.
Patent GB-583682-A (GB)
Title: Improvements in or relating to concrete mixers
IPC: B28C7/08
Filed: 1944-11-16
Abstract: 583,682. Mixing-machines. RANSOMES & RAPIER, Ltd., BRETT, C. E., and PRESTON, F. W. Nov. 16, 1944, No. 22678. [Class 86] [Also in Group XXX] A concrete mixer comprises a rotary drum, having track rings at each end of diameter less than that of the drum, and supported by rollers within a framing formed by sheet metal pressings mounted on a rectangular chassis. Mechanism for raising a pivoted charging hopper is disconnected automatically and a brake applied when the hopper is fully raised, in which position the hopper is reciprocated by a shaker mechanism in a direction parallel to its inclination. A discharging chute is pivotally mounted on the framing and may be held in any set angular position by a brake. An internal combustion engine or other prime mover is mounted on the chassis and provides power for rotating the drum and for raising and reciprocating the charging hopper. A mixing drum D is supported on a wheeled rectangular chassis comprising pressed steel members A and is partially enclosed within a framing formed by plate pressings A<SP>3</SP> and plating A<SP>4</SP>. An internal-combustion engine mounted on the chassis drives a pinion which meshes with and rotates a toothed ring D<SP>6</SP> on the drum D. A pinion M' in mesh with the ring D<SP>6</SP> may rotate a cam M on a shaft M<SP>1</SP>, through a clutch M<SP>4</SP>, M<SP>5</SP>. The cam M operates through levers M<SP>2</SP>, M<SP>3</SP>, to raise and lower a shaft E, fixed to a charging hopper E<SP>2</SP> and pivotally mounted in slots in the members A<SP>3</SP>. The slots are inclined in a direction parallel to the base of the hopper E<SP>2</SP> when the latter is fully raised. The clutch M<SP>4</SP>, M<SP>5</SP> is operated by a cam rotatable by a hand lever.
Patent GB-718572-A (GB)
Title: Improvements in or relating to an emulsion polymerisation process
IPC: C08F36/04
Filed: 1952-09-11
Abstract: In the emulsion polymerization of one or more compounds containing a CH2=C< group there is added to the reactants a short stop in an amount sufficient to prevent an excessive rise in temperature but less than the amount required for short stopping the polymerization. The preferred emulsion polymerization is of an aliphatic conjugated diene hydrocarbon or mixture thereof with a copolymerizable compound. Specified compounds are butadiene, 2, 3-dimethyl-1.3-butadiene, isoprene, piperylene, 3-furyl-1.3-butadiene, 3-methoxy-1.3-butadiene, chloroprene, bromoprene, methyl chloroprene, styrene, various alkyl styrenes, p-chlorostyrene, p-methoxystyrene, alpha-methyl-styrene, vinylnaphthalene, acrylic acid, methacrylic acid, methyl acrylate, ethyl acrylate, methyl alpha-chloroacrylate, methyl, ethyl or butyl methacrylate, methyl ethacrylate, acrylonitrile, methacrylonitrile, methacrylamide, methylisopropenyl ketone, methyl vinyl ketone, methyl vinyl ether, vinyl ethinyl alkyl carbinols, vinyl acetate, vinyl chloride, vinylidene chloride, vinylfurane, vinylcarbazole and vinyl acetylene.  Specified short stopping agents are hydroquinone, pyrogallol, catechol, guaiacol, benzoquinone, alpha-naphthoquinone, tetraphenylhydrazine, aniline, quinoline, nitrobenzene, benzoyl mercaptan and butyl mercaptan. The short stop may be added in incremental quantities and, in the case of hydroquinone, in total amounts less than 0.15 part per 100 parts of monomeric material.  In one particular case the temperature must not exceed 48 DEG F. at any time and not exceed 43 DEG F. for more than two hours-each time the temperature approaches the limit sufficient short stop being added to prevent the temperature exceeding the limit.  There may also be present in the emulsion tri-sodium phosphate, the potassium soap of dehydrogenated resin, the sodium salt of a condensed aryl sulphonic acid, potassium chloride, iron pyrophosphate and cumene hydroperoxide.
Patent GB-614806-A (GB)
Title: Improvements in or relating to electric condensers
Filed: 1946-07-31
Abstract: 614,806. Variable condensers. GENERAL ELECTRIC CO., Ltd., and BREWSTER, L. M. KING-. July 31, 1946, No. 22827. [Class 37] A differential condenser comprises two similar condenser assemblies 1 and 2, each having two electrodes 3, 4 and 5, 6, the 'electrode 3 of condenser 1 being electrically connected to the corresponding electrode 5 of assembly 2. The electrode assemblies 3 and 5 are in the form of metal pots closed by hemispherical insulating covers 7 and 8 which support the inner electrodes 4 and 6 and seal the tops of the metalpot electrodes 3 and 5. The level of the liquid dielectric 11 is varied in each chamber by means of flexible metal bellows 12 and 13 mechanically connected by a rod 14. The rod 14 is coaxial with the bellows 12 and 13, axial movement of the rod 14 varies the internal volumes of the bellows 12, 13 and the amount of and the level of the liquid dielectric in each condenser assembly 1 and 2. A metal conduit 15 connects together the spaces in the assemblies 1, 2. An alternative arrangement employing a piston may be employed in place of the bellows, or flexible tubular connections may be made between the two assemblies and the variation of liquid dielectric level effected by variation of the heights of the assemblies relative to one another. The space above the liquid dielectric may be evacuated or filled with an inert gas. Other than cylindrical electrodes may be employed.
Patent GB-1500607-A (GB)
Title: Photopolymerizable resin composition
IPC: G03F7/027
Filed: 1975-05-23
Abstract: 1500607 Printing plates SUMITOMO CHEMICAL CO Ltd 23 May 1975 [6 June 1974] 22860/75 Heading G2C [Also in Division C3] Photosensitive plates suitable for the production of printing plates comprise a support bearing a layer of a photopolymerisable composition comprising (a) 80-40 parts by weight of an unsaturated polyester which contains an acid component -OC-CH==CH-C-, at least one glycol component # O# ## -(OCH2CH2)nwhere n is 2-4 and optionally a further acid component -OC-C6H4 -C- in a molar O #O # ## proportion not exceeding that of the first acid component, the polyester having an acid value of 15-30; (b) 20-60 parts by weight of a crosslinking monomer or monomers containing #-hydroxyethyl methacrylate as an essential component; (c) a photopolymerisation initiator; and (d) a heat polymerization inhibitor. Component (b) may include up to 50 wt. per cent of a diethylenically unsaturated monomer such as di-or tri-ethylene glycol dimethacrylate. In Examples the initiator is benzoin or benzoin methyl ether and the inhibitor is hydroquinone. The exposed plate is developed using an alkaline solution e.g. sodium hydroxide, and can then be used in a heat press operating at temperatures up to 200‹C.
Patent GB-281418-A (GB)
Title: Improvements in or relating to loop-takers of sewing machines
IPC: D05B57/14
Filed: 1926-09-17
Abstract: 281,418. Pochin, F. H., Fochin, H. S., Dove, G. H., and Gent, A. S. Sept. 17, 1926. Lock stitching by hooks.-The bobbin 16 is secured within the loop taker 5 by a bridge-piece 12 which engages beneath a flange 9 on a rim 8. The bridge-piece is inserted through slots 11 in the flange, being pressed inwards against a spring 15 located in a hollowed stem 13, and is then rotated into securing position. The bobbin is held against the bottom of its recess by a spring 18 secured on the underside of the bridge piece, this also serving to guide the thread which passes through openings 20, 21, 22.
Patent GB-598628-A (GB)
Title: Improvements in or relating to flat single bed knitting machines
IPC: D04B35/00
Filed: 1946-01-07
Abstract: 598,628. Knitting-machines. KANGOL WEAR, Ltd., and HUBER, G. Jan. 7, 1946, No. 22956/45. [Class 74 (ii)]. A machine for knitting articles such as berets having a number of sections is provided with a knife E which is drawn across the machine by the cam box B to separate the sections as the fabric is knitted. The knife is brought into operation by a projection a<1> on a disc A<1> on the shaft of the patterning cylinder A. The bar a moves forward and a hook d<3> on the pivoted lever d<2> engages with a slot on the cam box. As the cam box and arm d<1> move across the machine the catch e is tripped by the inclined face e<4> on the arm E<2> and releases the knife which moves into the cutting position shown dotted in the Figure. Two rollers e<1> press against the fabric and hold it taut. At the end of the cutting stroke, the end e<2> of the knife contacts a face f on a stop F and the knife returns to its non-cutting position, being retained by the catch e. The cam box returns the arm d' and knife assembly to one side of the machine where it is stationary until the mechanism is operated again by the disc A', the lever d<2> being disengaged from the slot on the cam box. The disc A<1> may be geared to the patterning drum A so that the sections can be cut at any time in the cycle.