baber/WOPTO huggingface dataset:
Patent GB-848669-A (GB)
Title: Improvements in or relating to transistor amplifiers
Inventor: ROLFE GEORGE JOSEPH
IPC: H03G3/10
Filed: 1955-12-15
Abstract: 848,669. Transistor amplifier circuits. ELECTRIC & MUSICAL INDUSTRIES Ltd. Dec. 17, 1956 [Dec. 15, 1955], No. 35984/55. Class 40(6). Gain control in a transistor amplifier is effected by connecting between two stages two potentiometers which are electrically and mechanically coupled together so that varying the position of the sliders varies the attenuation between the stages without varying substantially the impedance presented by the potentiometer network to the transistors. In Fig. 1, two potentiometers 1, 3 of the same resistance value are connected as shown between two common emitter stages, the resistance of the potentiometers being low compared with the output and input resistances of the two stages. The sliders are arranged so that, in the diagram, they are raised or lowered together. To this end, the resistances may be arranged on opposite arcs of a circle with the sliders on an angularly variable diameter or may be coaxially mounted, with a common operating spindle for the sliders or they may be in the form of a pair of parallel strips or rods with a common slider. In Fig. 4 (not shown) the gain control system is applied to a common base type amplifier.
Patent GB-940113-A (GB)
Title: Process for the manufacture of unsaturated halogen compounds of the pregnane and androstane series and intermediate compounds obtained in the process
IPC: C07J5/00
Filed: 1959-10-23
Abstract: The invention comprises 7a -hydroxy-6b -halo derivatives of D 4-3-ketones and D 1,4-3-ketones of the pregnane and androstane series, together with a process for the preparation of D 4,6-6-halo-3-ketones and their D 1-derivatives by treating 6a , 7a -oxido-D 4-3-ketones of the pregnane or androstane series with a hydrohalic acid or an agent yielding such an acid, dehydrating any 7a-hydroxy-6-halo-D 4-3-ketones formed as intermediates, and if desired dehydrogenating in the 1:2-position by means of selenium dioxide, reducing any 11-keto groups to 11b -hydroxy groups, and/or esterifying any free hydroxyl groups. The process is particularly suitable for the preparation of D 6-6-halo derivatives of cortisone, hydrocortisone, prednisone, prednisolone, and the corresponding 16-hydroxy, 16-acyloxy, 16-methyl, 16:17-acetal and 16:17-ketal derivatives and esters thereof.  The invention is illustrated by thirty-one detailed examples.  The required 6a,7a-oxido-D 4-3-ketones are prepared by treating 6-dehydro compounds with monoperphthalic acid; the 6-dehydro compounds themselves being prepared by dehydrogenation with chloranil or by conversion of a D 4-3-ketone to its 3-ethyl enol ether, bromination with N-bromosuccinimide and dehydrobromination of the resulting 6b -bromo-D 4-3-ketone with dimethyl formamide/calcium carbonate.  Details are also given for the preparation of 16,17-acetonides of 16a, 17a-dihydroxy steroids, e.g. 16a-hydroxycortisone.  Specified compounds listed in the twelve "Preparations" include 9a-fluoro-6-dehydrocortisone 21-acetate, the corresponding 6a,7a-epoxide, 16a-methyl-9a-fluoro-3-ethoxy-D 3, 5-pregnadiene-11b , 17a, 21-triol-20-one 21-acetate, 6b -bromo-9a-fluoro-16a - methyl - hydrocortisone 21 - acetate, 9a-fluoro-16a-methyl-6-dehydro-hydrocortisone 21-acetate and its 6a,7a-epoxide, the 16,17-acetonide of 16a-hydroxycortisone 21-acetate, its 6-dehydro analogue and the corresponding 6a,7a-epoxide, 3-ethoxy-D 3,5-androstadien-17-one, 6b -bromo-D 4-androstene-3,17-dione, D 4,6-androstadiene-3,17-dione, 6-dehydro-17a-methyl-testosterone acetate, 6-dehydro-17a-hydroxyprogesterone acetate, 6b -bromo-17a-propionoxy-progesterone, 17a-propionoxy-6-dehydro-progesterone, and D 4,6-pregnadiene-17a, 21-diol-3, 20-dione diacetate.  Specifications 890,835, 895,842, 896,986 and 932,153 are referred to.  Reference has been directed by the Comptroller to Specification 914,784.
Patent GB-1243885-A (GB)
Title: Improved process for manufacturing polymers of conjugated diolefins and resulting polymers
Inventor: DAWANS FRANCOIS
IPC: C08F36/04
Filed: 1969-07-17
Abstract: 1,243,885. Conjugated diolefin polymers and preparation. INSTITUT FRANCAIS DU PETROLE DES CARBURANTS. ET LUBRIFIANTS. 17 July, 1969 [22 July, 1968], No. 36088/69. Heading C3P. Conjugated diolefins are polymerized in the presence of a #-allyl nickel haloacetate and a nitro-aromatic compound. The polybutadiene produced is characterized by having 40 to 55% cis - 1,4 - units, 40 to 55% trans - 1,4 - units and 1 to 20% of 1,2 - units, by having an intrinsic viscosity in toluene at 30‹ C. of at least 1 dl./g., and by having only one peak at about 22À8‹ C. and a crystallinity of at least 5% when examined under X-rays at -30‹ to -60‹ C., said crystallinity being absent at 20‹ C. In examples, butadiene or isoprene are homopolymerized in the presence of #-allyl nickel trifluoroacetate and nitrobenzene.
Patent GB-1132758-A (GB)
Title: Vehicle wheel suspension
Inventor: BURNHAM HORACE JAMES
IPC: B60G3/24
Filed: 1966-08-12
Abstract: 1,132,758. Preventing brake-dive. ROLLSROYCE Ltd. 7 Aug., 1967 [12 Aug., 1966], No. 36098/66. Heading B7D. A suspension of a vehicle wheel braked by an inboard brake 16 has its virtual centre, i.e. the point about which instantaneous movement of the wheel takes place, 24, either on the wheelbase side of the wheel and above the wheel centre height or outside the wheel base and below the wheel centre height to resist brakedive or acceleration squat. In Fig. 1 a front wheel hub 10 is mounted in a hub carrier 13 secured to a kingpost 14 and is rotatable with a shaft 12 which includes a pair of universal joints, is braked by an inboard brake 16 mounted on the vehicle structure and may be driven. The kingpost is connected by ball joints 21, 22 to an inclined leading link 17 and a wishbone 18 above the wheel centre. The horizontal wishbone axis 20 and link axis 23 define the virtual centre 24. In alternatives a front wheel is supported by a telescopic strut (30), (Fig. 3, not shown), which may be sprung by a coil spring and include a damper, located laterally by a wishbone the axis (29) of which is inclined upwardly and rearwardly or by a pair of wishbones (Figs. 5, 6, not shown) the inclined axes (34, 35) of which, when projected on a longitudinal plane, intersect above the wheel centre height. Bump stops are provided to maintain the virtual centres above the wheel centres.
Patent GB-1178654-A (GB)
Title: Process for the COntrol of Scale
IPC: C02F5/12
Filed: 1968-07-29
Abstract: 1,178,654. Scale-Inhibition. BUCKMAN LABORATORIES Inc. July 29, 1968 [Feb. 7, 1968], No.36123/68. Heading C7E. A process for removing scale and/or inhibiting the formation of scale due to the presence of water in a heat transfer or heat-exchange apparatus or system comprises adding to the said apparatus or system at least one N, N, -dimethylamide of a straight-chain carboxylic acid containing 18 carbon atoms and at least one carbon-carbon double bond. The composition may comprise a mixture of N, N-dimethylamides of carboxylic acids derived from tall, linseed, soybean, cottonseed, corn, castor, olive, peanut, rapeseed, safflower or sesame oils, or the N, N 1  dimethylamide of oleic, linoleic, ricinoleic, or linolenic acid. 0À2 to 200 p. p. m. of the amide are added to the aqueous medium in a condenser, cooler, or evaporator, and, for scale removal, a composition is used which also contains a cleaning agent such as NaOH or Na 2 Si0 3 .
Patent GB-432249-A (GB)
Title: A process for the treatment of mineral oils
IPC: C10G21/06
Filed: 1934-12-17
Abstract: Mineral oils are extracted with anhydrous crude cresol to separate the paraffinic constituents which are removed, and the extract is saturated with water whereby the naphthenic constituents are separated, leaving aromatic and resinous constituents in the aqueous cresol.  Lubricating oil distillates, hydrogenated or cracked oils and transformer oils may be treated. A spindle oil which may be pre-extracted with sulphuric acid, is treated at 0 DEG  C. with anhydrous cresol.  The supernatant paraffinic oil is separated and the cresol extract is saturated with water at ordinary or slightly elevated temperature.  The separated naphthenic oil is removed and treated with superheated steam to remove cresol, and yields a lubricating oil resistant to oxidation.  The aqueous cresol mixture is distilled at ordinary or reduced pressure to remove water and cresol, leaving an aromatic resinous oil which may be used as an inferior lubricating oil or further fractionated to yield an aromatic oil and a resinous product which may be used for softening asphalt. The paraffinic and naphthenic lubricating fractions thus obtained may be further treated with Fullers or other absorbent earth, or with soda, or they may be dewaxed.ALSO:Asphalts are softened by addition of a resinous substance extracted from mineral oils by treatment with cresol.  Mineral oil is extracted with anhydrous crude cresol, and after removing the separated paraffinic hydrocarbons, the extract is saturated with water which separates the napthenic hydrocarbons.  The aqueous cresol extract is distilled to remove cresol and water, and the resulting aromatic resinous oil may be used as such or is fractionated to separate aromatic hydrocarbons from the resins. Lubricating distillates, cracked or hydrogenated oils may be treated.
Patent GB-1040318-A (GB)
Title: Apparatus for stranding tele-communications cables
IPC: H01B13/02
Filed: 1963-09-13
Abstract: 1,040,318. Cables. SIEMENS-SCHUCKERTWERKE A.G. Sept. 13, 1963 [Sept. 14, 1962], No.36253/63. Heading H1A. Apparatus for stranding telecommunication cable of the kind having at least one layer of individually insulated conductors or cores in which the cores are systematically transposed comprises a plurality of carrier members each accommodating an even number of cores and each capable of introducing relative changes of position of some only of the odd or even cores. As shown, the cores are supplied from sets of bobbins V 1  . . . V n  (Fig. 2, not shown), each comprising four bobbins a, b, c, d, Fig. 4, each core being associated with a take-off device 11, 13, 15 and a weighted pulley arrangement 17, 18, 19, 20 for dealing with slack. The groups of four cores then pass to the carrier members Kr 1  ... Kr n , Fig. 1, each of which can be controlled to rotate the four cores as a whole and thus change their positions in the completed cable. As the cores leave the crossing devices they pass through the centres of subsequent carrier members which change the positions of subsequent groups of four cores if desired. All the groups then pass through a fixing head 55, a stranding head 54, a lapping head 49, into a stranding yoke J, which gives a helical lay to the cores, and the cable is finally taken up on a drum T. Carrier member details (Fig. 6).-Each carrier member has a rotor comprising two annular plates 23, with a third annular plate 24 between them, and a carrier ring 21. Plate 24 is fastened to each plate 23 by a ring of pins upon which rollers 28 turn, forming almost frictionfree annular guide paths 25, 26 for cores coming from wheels 18. The rotor turns in a bearing arrangement consisting of wheels 22 which run freely on pins that are fixed to frames 27. The cores are taken inside the carrier member through openings 29, Fig. 4, formed by placing some rollers nearer the axis than others, and then over pulleys 30 so that their direction of travel is changed by 90 degrees, towards the stranding head. Before leaving the carrier member the cores go through symmetrically spaced holes 31 and 311 in the carrier ring and in the annular plate 23 upon which it is mounted, respectively. As shown in Fig. 4, on one of the two annular guide paths 25, 26 two cores are looped in an anti-clockwise sense. On the other, two cores are looped in a clockwise sense (Fig. 3, not shown). Gear teeth are cut into the periphery of carrier ring 21 and mesh with a train of gears by means of which the carrier member rotor may be turned either manually by hand wheel 32 or by an electric motor 38. In the latter case, the rotor may be turned in either direction by operation as desired of a reversing device included in the gear assembly. The first two carrier members, Kr 1  and Kr 2 , may be simplified by providing carrier rings only and feeding in the cores axially from the end of the apparatus.
Patent GB-416973-A (GB)
Title: Improvements in and relating to the treatment of rubber
IPC: C08K5/00
Filed: 1932-12-22
Abstract: A small proportion of an unsaturated aliphatic carboxylic acid having less than 10 carbon atoms or a zinc salt thereof is added to a rubber mix containing a semi-ultra or ultra accelerator. Included are crotonic, tiglic, fumaric and maleic acids and their zinc salts.  The invention is applicable in the preparation of self- or air-curing cements, to prevent the gelling of the cement before use.  The amount of softener, such as pine tar and pine oil may also be advantageously reduced.  The hardness and resistance to bending of heavily-loaded stocks, e.g. containing at least 50 per cent of loading material, are also increased by the additions. Examples illustrating the advantages of the invention are given one of which using 3 parts of fumaric or maleic acids in a mix containing 100 rubber, 334,8 loading material (known under the Registered Trade Mark "Asbestine"), 5,6 zinc oxide, 4,0 sulphur, 1,5 benzothiazyl disulphide, 0,15 tetramethylthiuram disulphide, 5,0 softener and 2,0 antioxidant.  Specification 196,924, [Class 70], is referred to.  The Specification as open to inspection under Sect. 91 comprises also the use of formic, heptylic, linoleic, palmitic, lauric, oleic, dichloracetic, caproic, capryllic, pelargonic, capric, succinic, citric, malic and adipic acids and metal salts thereof including inter alia zinc lactate, oxalate and tartrate.  This subject-matter does not appear in the Specification as accepted.
Patent GB-1482922-A (GB)
Title: Manufacture of penicillin and cephalosporin compounds
IPC: C08F8/14
Filed: 1973-07-31
Abstract: 1482922 Polymer-drug reaction products GLAXO LABORATORIES Ltd 30 July 1974 [31 July 1973] 36386/73 Headings C3P and C3R [Also in Division C2] Carboxylic acid derivatives of penicillin or cephalosporin are attached via the carboxy groups by ester linkages to reactive polymers, each polymer molecule carrying a plurality of drug molecules. Suitable reactive polymers include (1) styrene/divinyl benzene copolymers containing diazomethylene groups, prepared by reacting the copolymer first with acetyl, benzoyl or alkoxy-substituted benzoyl chloride, then converting the acyl derivative to the hydrazone derivative by reaction with hydrazine, and finally oxidizing this, e.g. with peracetic acid; (2) a polymer containing benzhydrylamine groups prepared by reductive amination of benzoylated styrene/divinyl benzene copolymer, reaction with the drug being effected in the presence of nitrosyl chloride which nitrosates the amine groups; (3) styrene/ divinyl benzene copolymer substituted with alpha-hydroxybenzyl groups; (4) atyrene/allyl alcohol copolymer; (5) the diazomethylene polymer prepared by oxidizing poly(benzyl) to form poly(benzoyl), converting this to the hydrazone form by reaction with hydrazine, and oxidizing the hydrazone with peracetic acid; and (6) the diazomethylene polymer prepared by a similar sequence starting from styrene/methyl vinyl ketone/divinyl benzene copolymer. Numerous different penicillin and cephalosporin acids which may be so reacted are specified. The purpose of the above polymer attachment is to immobilize the drug so that further reactions may be effected thereon. Exemplified reactions include (i) oxidation of sulphide to sulphoxide groups; (ii) reduction of sulphoxide to sulphide groups; (iii) de-acylation of N-acylated compounds; (iv) re-acylation with different groups, e.g. with thienylacetyl chloride; (v) ring expansion of penicillin acid 1-oxide compounds to corresponding cephalosporin compounds; and (vi) reaction of 3- hydroxymethyl groups with isocyanates. The thus-modified polymer-drug reaction products may be treated to release the modified drug, e.g. with formic acid or trifluoroacetic acid-for drugs so obtained, see Division C2.
Patent GB-634787-A (GB)
Title: Improvements in or relating to echo sounders and similar distance measuring devices
IPC: G01S15/14
Filed: 1946-12-11
Abstract: 634,787. Echo-sounding. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and HASSAN, H. Dec. 11, 1946, No. 36641. [Class 118 (ii)] An echo sounder comprises a pulse transmitter and a receiver for reflected echoes of the pulses; means for changing the current flow in a circuit from one predetermined value obtained between the transmission of a pulse and the reception of its echo to another predetermined value occurring at all other times; and means for utilizing the average current in the circuit for continuously operating a depth recorder. The pulse recurrence frequency of transmission is maintained constant (although it is stated in the Provisional Specification that compensation for any departure from constancy may be arranged). One of the predetermined current values may be zero as in the embodiment described wherein a magneto-striction pulse transmitter 14 is operated by. a multi-anode mercury vapour tube V1 triggered by an electrically maintained tuning fork T. As each pulse is emitted, thyratron V2 is rendered conductive by the pulse from anode 1 of V1 and a predetermined current passes through the circuit including meter 38. When an echo is received by receiver 83 the signal is amplified by V5 and V4 and used to control a second thyratron V3 which, when triggered, discharges condenser 42 through low resistance 41. This applies a negative potential to the anode of V2 and extinguishes V2. The current through meter 38 smoothed as shown is proportional to the depth. The current through meter 47 is proportional to the number of times V3 is triggered and the indication thus shows the number of echoes received. The current through V3 may control the sensitivity of the receiver amplifier. Rectifier 45 and its circuit control the cathode bias of V3 and thus the output from V4 required to strike V3. The components are chosen so that when one echo is received for each pulse transmitted a low voltage is needed to strike V3, but if a re-echo is received the striking voltage is ten times greater so that V3 is operated only by the strongest signal. To prevent V3 being triggered at the instant of transmission, a negative pulse is applied to the grid thereof from anode 2 of V1. Automatic time-gain control is incorporated in amplifier V5, V4. It is stated that the embodiment of Fig. 1 may require manual control to prevent "hunting" due to the striking voltage of V3 being.delayed by the action of the rectifier circuit. In a modified circuit, Fig. 2 (not shown); a double-diodetriode is connected between V4 and V3. The triode acts as a cathode-follower offering a low impedance to the diodes and the grid potential of V3 is dependent on the strength of the received echoes. In addition there is automatic gain control of V5 to reduce noise. The circuit of Fig. 2 is stated to be more fully automatic and to operate substantially without delay.
Patent GB-619575-A (GB)
Title: Improvements relating to machine-tools for turning metal
IPC: B23B25/02
Filed: 1946-12-13
Abstract: 619,575. Turning. HERBERT, Ltd., A., LLOYD, A. H., and EATOUGH, C. Dec. 13, 1946, No. 36797. [Class 83 (iii)] A lathe has means by which the rate of feed can be periodically varied to produce local reductions in the thickness of the cutting so that the latter breaks into short lengths. In the embodiment described the means comprises a spring-biassed clutch in the feed mechanism. A sleeve 22 is keyed to the driven shaft 20 of the feed mechanism and slidably splined with a dogclutch member 23 having teeth 26 held in engagement with corresponding teeth on the driving member 19 by a spring 24. A recess 31 is formed in the dog-clutch member to receive a glut (not shown) pivotally mounted on a handle 14 for disengaging the clutch. The handle may have a flexible connection with a hand-grip portion which can be held by the operator. Clutches of the conical or plate type may be used.
Patent GB-306391-A (GB)
Title: Improvements in or relating to control apparatus for automatic coin release mechanism
IPC: G03B17/53
Filed: 1928-12-13
Abstract: 306,391. Siemens &. Halske Akt.-Ges. Feb. 18, 1928, [Convention date]. Automatic and coin-freed apparatus. - In coin-freed apparatus f o r supplying strip-shaped articles from a storage roll, a coin-slit closing-device is controlled by a member, an element of which, by gravity or spring action, bears against the edge of the strip, the member being so constructed and arranged that the coin-slit is automatically closed at the start of each delivery operation and maintained closed until the material to be supplied has been delivered. In the application to an automatic photographic machine, the coin-slit is closed by an electro-magnet when contacts 7,. 8 are opened, the contact 7 being carried by a lever 10 pivoted at. 11 and having a roller 12 to engage the edge of a paper strip 1 of exposures travelling in guides 2. On starting the machine by a coin, a lever 5 moved by the driving mechanism opens the contacts 7, 8 by causing a lever 6 to engage a tail 9 on the lever 10. The lever 10 is then held in its depressed position against the action of a spring 15 by the roller 12 engaging the edge of the strip 1. When the portion of the strip 1, cut off at 4, passes out of the machine, the lever 10 is pulled up by the spring 15 to close the contacts 7, 8 and open the coin-slit. When the strip is exhausted, a lever 16, controlled by a spring 18 and having a roller 17 to bear against the edge of the strip, actuates the lever 10 through a chain 20 to open the contacts.
Patent GB-757198-A (GB)
Title: Improvements in the production of metal powders
IPC: B22F9/30
Filed: 1954-12-22
Abstract: 757,198. Metal powders. BADISCHE ANLIN- & SODA-FABRIK AKT.-GES. Dec. 22, 1954 [Jan. 5, 1954], No. 37003/54. Classes 72 and 82(1). Nickel, iron, iron-nickel and other powders are obtained in a uniform particle size by thermal decomposition of the carbonyl in the free space of an externally heated container, the surfaces not supplying heat for the decomposition being kept at a temperature at or slightly above the condensation temperature of the metal carbonyl but below the temperature at which a decomposition of the metal carbonyl takes place on said surfaces. A container A is supplied with the carbonyl vapour through a pipe D, into a zone cooled by a jacket E and then to the heated portion of the container, the heat being supplied by gases in a jacket B. The lower part of the container is also cooled by a jacket supplied at F2. Carbon monoxide is removed at L and passes through a filter M. Metal powder is removed at K and N.
Patent GB-981980-A (GB)
Title: Stuffing box arrangement
Inventor: MAGOS JOHN PETER
IPC: F16J15/18
Filed: 1963-09-20
Abstract: 981,980. Stuffing-boxes; valves. CRANE Ltd. Sept. 20, 1963, No. 37188/63. Headings F2B and F2V. A stuffing-box packing arrangement comprises V-formed packing rings 23 supported between a backing ring 21 seated on the inner end of the box chamber 10 and a first split spring ring 15 engaging a groove in the chamber and further V-formed packing rings 28 supported by a backing ring 29 abutting a second split spring ring 18 engaging a groove adjacent the outer end of the chamber. A filler ring 24 is disposed between the spring ring 15 and the adjacent V-ring 23 and the space between the ring 24 and the V-rings 28 is filled with plastic packing 26 injected through a hole 25 by a fitting 27. The V-rings may be of rubber, leather or synthetic plastics material. The invention is shown applied to the stem 6 of a valve.