baber/WOPTO huggingface dataset:
Patent GB-1494758-A (GB)
Title: Prostaglandin intermediates
IPC: C07D307/935
Filed: 1975-02-27
Abstract: 1494758 Cyclopentaneacetic acid derivatives GRUPPO LEPETIT SpA 27 Feb 1975 [1 March 1974] 8263/75 Heading C2C The invention comprises cyclopentaneacetic acid derivatives of the Formulae Xa or Xb or mixtures thereof wherein R is H, C 1-6  alkyl benzyl, trityl, C 1-4  alkoxy-C 1-6  alkyl, 2-tetrahydropyranyl, C 2-8  alkanoyl or benzoyl optionally substituted by Cl, F, Br, C 1-6  alkyl, phenyl or cyclohexyl; R<SP>2</SP> is C 1-6  alkyl, phenyl or benzyl and A is C 2-8  alkanoyl, di-(C 1-6  alkyl) carbamoyl, (C 1-6  alkoxy) carbonyl, or optionally substituted by C 1-6  alkyl, Cl, Br, F, phenyl or cyclohexyl; and their conversion to lactones of the Formula Ia or Ib or mixtures thereof, wherein R<SP>2</SP> is hydroxymethyl, carboxy or COOR<SP>2</SP>, by cyclization and converting the resulting lactone into lactones having other R and/or R<SP>2</SP> groups by known methods. The compounds of Formulae Xa and Xb are prepared by reacting acyloxysuccinyl halides of the formula or mixtures thereof, with salts of the formula [-CH(Y)COO-][X<SP>+</SP>] 2  wherein Y is COOR<SP>2</SP>, and X is alkali metal cation, MgBr<SP>+</SP>, MgCl<SP>+</SP> or MgI<SP>+</SP>, cyclizing the resulting 3,6-dioxooctenedioic acid derivatives of the formulae or mixtures thereof, to form cyclopenteneacetic acid derivatives of the Formulae Va or Vb or mixtures thereof, reducing these compounds either in a single step or via À3-oxocyclopentaneacetic acid derivatives of the Formulae VIa or VIb or mixtures thereof, to give cyclopentane acetic acid derivatives of the Formulae Xa or Xb above in which R is H, and if desired converting these compounds into compounds of Formula Xa or Xb in which R is other than 18 by known methods. P-Acetoxysuccinyl chloride and P-benzoyloxysuccinyl chloride are obtained by reacting zinc chloride with P-2-acetoxysuccinic anhydride and P-2-benzoyloxysuccinic anhydride, resulting from the treatment of p-malic acid with acetyl or benzoyl chloride.
Patent GB-827273-A (GB)
Title: Detachable shoe for pit props
IPC: E21D15/54
Filed: 1958-03-14
Abstract: 827,273. Pit props. SCHMIDT, R. March 14, 1958 [March 15, 1957], No. 8288/58. Class 20(2) A detachable foot for a pit prop 7 comprises two identical halves 1 each formed of a foot plate 4 and an upwardly and inwardly tapering wall having an inwardly projecting recess 2 for connecting bolts. The halves bear against the underside of a ring 8 on the prop and have slots 9 into which setting wedges are introduced. The inner walls of the recesses 2 bear on the foot 6 of the prop which rests on a rubber plate 5. The foot may be made of cast steel or plastics.
Patent GB-113389-A (GB)
Title: Improvements in Lathes for Tapering Twist Drill Shanks and for like purposes.
Inventor: HUNT HERBERT
IPC: B23B5/38
Filed: 1917-06-11
Abstract: 113,389. Hunt, H., Hunt, H. W., and Hunt, P., (trading as Hunt & Sons, H.). June 11, 1917. Lathes.-A lathe for tapering twist drills is provided with a tail-stoch centre b and a grooved former g, for determining the tape, which normally are relatively fixed but may be relatively adjustable for various tapers. In one construction, the tail-stock a is fixed, and the head-stock centre is adjustable. The mandrel d is screwthreaded, and is adjusted by a sleeve f and handwheel f<1>. In a modification. the tailstock centre and guide are geared together and simultaneously adjusted. The saddle o is in two parts, one of which rests on the other and carries a block r<1> engaging the same groove in the bar g. The saddle is moved by a. screw s which is operated through a clutch controlled by a bell-crank which may be operated by a hand-lever or by an adjustable stop block engaged by a nut on the saddle. An adjustable collar w<2> on the boss of the handwheel w' is engaged by a sliding bolt w<3>, and limits the forward and rearward movement of the tool. Varying degrees of taper may be provided for by using former bars of different inclination.. Lubricating means for the tool are described, and. a guard for the former bar is provided.
Patent GB-572470-A (GB)
Title: Improvements in radio-directional aerial systems for very high frequency operation
IPC: H01Q21/29
Filed: 1941-07-07
Abstract: 572,470. Directional aerial systems. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and WRIGHT, F. M. July 7, 1941, No. 8584. [Class 40 (v)] In a directional aerial system for ultra-high frequency which includes a single-turn screened loop aerial and an associated omnidirectional aerial for determination of sense, a tuning condenser b for the loop aerial a and a leakage inductance gap e in the screen d are both symmetrically situated about the point of the loop aerial which, in operation, is at the highest potential, and the omnidirectional aerial f is symmetrically arranged in relation to the loop so as not to degrade the figure-of-eight diagram provided by it. In the form shown in Fig. 1, the aerial f is a rod in line with the vertical diameter of the loop, the lower end being connected to a tuned circuit g. Coupling between the two aerials is provided by a condenser plate h<1> connected to the circuit g and adjustable in a tubular extension of the screening ' chamber i in relation to a fixed plate h<11> constituted by or closely associated with a part of the loop aerial screen d. The screen i and the rotor of the series gap condenser b are connected by a conductor j extending along the vertical diameter of the loop to the equipotential point. The system is connected to the receiver by a screened coupling loop c. The conductor j may form a remote control for the rotor of the condenser b. The aerial f may be rendered inoperative, when figure-of-eight readings are to be made, by bringing the condenser plate h<1> into contact with a flange m. In a modification, the length of the aerial f is adjustable and the condenser plate h<1> is carried by a plunger adjusted by a cam operated through a rod from a handle at the base of the loop. In further modifications, the,open aerial f is off-set from the rotational axis of the loop in the plane containing the axis and perpendicular to the plane of the loop. Fig. 6 shows a preferred construction of this form, in which the tuned circuit of the open aerial is situated within the loop, and a further adjustable electrode z<1> conneoted to the screen i operates as a capacity coupling to the loop aerial screening box n<1> to balance the loop aerial during figures-of-eight observations. The aerial tuning condensers are ganged to a common control shaft j; on lowering this shaft against the action of a spring sp when a sense determination is to be made, the ganging clutch cl releases the condenser b to permit precise independent adjustment of the tuning of the open aerial f and at the same time opens a switch sw which during figure-ofeight readings short-circuits the tuning circuit of this aerial.
Patent GB-609668-A (GB)
Title: Improvements in or relating to glass cutters
IPC: C03B33/12
Filed: 1946-03-20
Abstract: 609,668. Glass cutters. BENRATH MACHINE TOOLS, Ltd., and MARTIN, H. March 20, 1946, No. 8615. [Class 56] In a glass cutter comprising a cutting wheel h mounted in the head a of the tool, the head is formed with a recess d and the wheel is rotatably mounted on a pin g extending inwardly from the rebated portion f<SP>1</SP> of a member f, removably secured by the screw e in the recess d, the rebate f<SP>1</SP> and the recess d defining the housing for the wheel.
Patent GB-642800-A (GB)
Title: Polymeric 4-vinylcyclohexene dioxide
Filed: 1948-03-24
Abstract: Polymers of 4-vinyl cyclohexene dioxide are produced by subjecting the compound to polymerization conditions in the presence of a polymerization catalyst.  Suitable catalysts are zinc chloride, stannic chloride, boron trifluoride, arsenious oxide, sulphuric acid, oleum, sodium methoxide, benzoyl peroxide, sodium perborate, trimethyl borate, dihydroxyfluoboric acid, fluosulphonic acid, chlorosulphonic acid, periodic acid, chloric acid, iodic acid, ferric chloride, aluminium chloride, boron trichloride, silicon tetrachloride, arsenic trichloride, antimony trichloride, phosphorus trichloride, antimony trioxide and phosphorus trioxide.  They may be present in concentrations of from 0.0001-10 per cent of the monomer. Suitable temperatures are from 20-120 DEG  C. and cooling may be necessary.  The products range from colourless or slightly yellow syrups to hard, clear solids which are unattacked by cold concsulphuric acid, hot 30 per cent sulphuric acid or hot 30 per cent sodium hydroxide and are insoluble in common organic solvents.  They may be coloured by adding a dye before polymerization and shaped articles may be formed by polymerizing in a mould.  They may be machined and polished and, modified by other materials, used in protective coatings.  Specification 642,799 is referred to.
Patent GB-933885-A (GB)
Title: Improvements in or relating to sewing machine feed mechanisms
Inventor: HUNT RICHARD EDWIN
IPC: D05B29/10
Filed: 1961-03-09
Abstract: 933,885. Sewing; sewing machines. TOOTAL BROADHURST LEE CO. Ltd. June 8, 1962 [March 9, 1961], No. 8633/61. Class 112. In a sewing machine the presser foot is provided on each side of the needle with a rotatable element adapted to engage the work when the presser foot is lowered, the elements being so located that a line joining their centres of rotation intersects the needle axis and lies at right-angles to the line of stitching. As shown in Figs. 1 and 2 the presser foot 26 carries on each side of the needle 34 a roller 28 mounted on ballbearings. The presser foot and a feed dog 30 co-operate with a template 10 for sewing around the edge of a collar blank. The template comprises upper and lower plates 12 and 14 enclosing the collar blank 16 which abuts locating studs 18. Studs 20 on plate 14 project through holes in plate 12 to align respective slots 24 in the shape of the required line of stitching. The needle plate 32 carries a perforated needle guide stud 36 which projects into the slot 24 in plate 14 to guide the template. The presser foot may also be provided with a needle guide stud projecting into the slot 24 in plate 12. The plates may be made from aluminium or plastic and may be formed with lightening holes 22. The feed dog may be made from or coated with rubber or nylon. In a modification, Fig. 7, the presser foot carries on each side of the needle a spring-biased ball 42.
Patent GB-130434-A (GB)
Title: Improvements in or relating to Railway and similar Signals.
Inventor: BIDDLE WALTER HARRISON
IPC: B61L3/04
Filed: 1918-05-30
Abstract: 130,434. Biddle, W. H. May 30, 1918 Rods and wires for operating signalling-apparatus.-A trip-operated slip-connexion comprises two bars b, g sliding longitudinally in guides and connected respectively to the signal arm and the signal lever by wires or the like, and having interengaging shoulders b<2>, g<1>. The upper bar g is lifted about its end g<2> when the treadle is depressed by a train wheel, and the two bars b, g are thereby disengaged and the signal returns to danger under the action of its counterweight. The shoulder g<1> of the bar g then rests on the surface b<4> of the bar b, and the treadle j is left free to fall below the level of the wheels so as to avoid repeated blows. In order to put the apparatus out of action when required, an electro-magnet o is arranged to lift the lever k, so that when the signal is set clear, the nose of the bar g passes below the roller n<1> and lifts the lever k still further, thereby putting the treadle j completely out of its operative position, so that a passing train does not replace the signal to danger. The magnet o may be cut out of circuit after the signal is set to clear.
Patent GB-1411342-A (GB)
Title: Process for the production of omega-ureidocarboxylic acids
IPC: C07C273/18
Filed: 1973-02-23
Abstract: 1411342 Omega-ureidocarboxylic acids BADISCHE ANILIN- & SODA-FABRIK AG 23 Feb 1973 [24 Feb 1972 11 Jan 1973] 8936/73 Heading C2C Omega-ureidocarboxylic acids are produced by reaction of an omega-lactam with urea at elevated temperature in the presence of an inert solvent, e.g. water or a C 1  to C 4  alkanol or a mixture thereof, and in the presence of a mineral acid or a strongly acid ion exchanger. Exemplified is the production of #-ureidocaproic acid, #-ureidobutyric acid and 8-ureidocaprylic acid from caprolactam, pyrrolidone-(2), and caprylolactam respectively. The starting material may also be the reaction mixture containing an omega-lactam obtained from the Beckmann rearrangement of the corresponding oxime with sulphuric acid, oleum or phosphoric acid.
Patent GB-116707-A (GB)
Title: Improvements in or relating to Apparatus for Determining the Heating Value of Gases.
Inventor: STRACHE HUGO
IPC: G01N25/46
Filed: 1918-05-30
Abstract: 116,707. Strache, H. May 30, 1918. Calorimeters.-Gas explosion calorimeters have the explosion chamber surrounded by a silvered Dewar non - conducting jacket, the mercury filling of a thermometer within the explosion chamber serving as the calorimetric substance. The explosion chamber 1, surrounded by the vacuum jacket 3, is connected to an interchangeable measuring vessel 4 with threeway cocks for filling it with the gas under test and for introducing the gas mixed with air (drawn through the tube 12) into the explosion chamber 1, with which is connected a levelling bottle 10.
Patent GB-147263-A (GB)
Title: An improved universal joint
IPC: F16D3/44
Filed: 1919-04-09
Abstract: 147,263. Marks, E. C. R., (Hartford Automotive Parts Co.). April 9, 1919. Universal joints.-The driving and driven members a, b of a universal joint are each provided with a pair of diametrically opposed horns fitted with wearing-blocks 6, 11, which may be held in place by screws 7. The blocks engage recesses or slots 8, 12 in a solid connecting piece 20. At the bottom of each recess, the piece 20 is of cylindrical form, and the wearing blocks are correspondingly shaped to form bearings and hold the member in assembled relation. A dust cap for the joint is formed in two parts 25, 26 the movable part 25 being held in place by a spring 27 abutting against a collar 28.
Patent GB-209345-A (GB)
Title: Transformers for audio frequency amplifiers and the like
IPC: H01F19/02
Filed: 1923-03-29
Abstract: 209,345. Western Electric Co., Ltd., Smith, C. P., and McPherson, W. L. March 29, 1923. Transformers.-In an ironcore transformer for audiofrequency amplifiers and the like, the length A of the winding space is not greater than one-half of its depth B in order that the self-capacity of the windings may be kept low.
Patent GB-330031-A (GB)
Title: Improvements in travelling bags
IPC: A45C7/00
Filed: 1929-03-20
Abstract: 330,031. Cambridgeshire Tuberculosis Colony, (trading as Papworth Industries), Charnock, G. E., and Carter, G. March 20, 1929. Bags.-The side compartments a, b, of a " Gladstone bag each consist of a rigid part and one or more expansible gussets e. The bag may be provided with straps, pockets, &c. as desired, and one or mone hinged partitions f, fitted with pockets, may be provided.
Patent GB-648382-A (GB)
Title: Electron discharge tube circuit
IPC: H03F3/52
Filed: 1947-04-03
Abstract: 648,382. Valve amplifying circuits. STANDARD TELEPHONES & CABLES, Ltd. April 3, 1947, No. 9067. Convention date, April 10, 1946. [Class 40 (vi)] A positive bias potential for the cathode of a thermionic valve amplifier is provided by a second valve connected between the cathode of the amplifier and the H.T. source and provided with a negative feed-back coupling between its anode and grid operative at signal frequencies. The anode of one section 8 of a double triode valve is connected to the cathode of an amplifying section 4. Negative feed-back for the section 8 is taken from the junction of condenser 13 and resistor 14 connected between the anode and cathode of the section. This arrangement ensures that the A.C. resistance of the cathode impedance of the amplifier section 4 is much lower than its D.C. resistance, thus minimizing unwanted negative feed-back.
Patent GB-1360612-A (GB)
Title: Cigarette filters
IPC: A24D3/02
Filed: 1971-06-30
Abstract: 1360612 Tobacco-smoke filter manufacture MOLINS Ltd 30 June 1971 [1 July 1970] 9079/74 Divided out of 1360611 Heading A2C This specification describes the same apparatus as that described in Specification 1360611, but the claims are directed to apparatus comprising means for making a continuous smoke filtering rod and for continuously delivering the rod along a longitudinal path, a deforming device comprising at least one rotary member having upon it deforming surfaces which upon rotation of the member describe paths which intersect the path of the continuous rod and deform it at intervals along its length, and a device for cutting the rod at locations predetermined in relation to those at which it has been deformed.
Patent GB-477596-A (GB)
Title: Automatic fire arm
IPC: F41A3/56
Filed: 1936-03-26
Abstract: 477,596. Automatic guns. JANECEK, F., and JANECEK, F. K. March 26, 1936, No. 9088. Void. Convention date, March 26, 1935. [Class 92 (ii)] A machine gun with fixed barrel 1 has the breech block 4 unlocked by the short recoil of the cartridge case and moved a short distance rearwards to communicate through an accelerating-lever 7 momentum to an inertia block 5 which engages the breech block by a claw c to open the breech for loading. After a limited rotation, the lever 7 engages a fixed surface 11 and ceases to act on the block 5, the breech block passing through a gap in the lever as the parts move from the position shown in Fig. 1 to that shown in Fig. 3. In a modification, a rotary breech block engages by interrupted locking-collars with a locking ring which bears against the accelerating-lever. The block 5 in this case carries helical surfaces which engage the breech block to rotate it for unlocking. The cartridge-feed mechanism shown comprises an extractor 22 on the block 5 for withdrawing cartridges from a belt passing over a grooved drum 16. The cartridges are withdrawn into a rocking feed lever 17 which is pressed upwardly by a spring 20 when a catch 18 is released by a shoulder on the extractor 22. During closure of the breech, the lever 17 is rocked downwardly and causes feeding rotation of the drum 16.
Patent GB-1097436-A (GB)
Title: Improvements in or relating to electrical detecting arrangements
IPC: G01R19/15
Filed: 1965-03-03
Abstract: 1,097,436. Detecting largest current source. CONTINENTAL ELECKTROINDUSTRIE A.G., [trading as CONTINENTAL ELECKTROINDUSTRIE A.G. ASKANIA WERKE]. March 3, 1964 [March 3, 1964], No. 9144/65. Heading H3T. [Also in Division G1] To detect which one of a plurality of D.C. sources is providing the largest current, the sources are connected series-aiding in a closed ring and each source is shunted by a diode in series with the input to an amplifier whose input resistance varies inversely with the input current; the amplifier controls indicating means to show when the input current is below a predetermined value, this denoting that the corresponding source is contributing the largest current. Fig. 2 shows the sources G1, G2 in series with a load impedance 24 which is assumed to have no effect on variations in current generated by the sources. The largestcurrent source 20 will drive current through the diodes 26 and amplifiers 28 across the other sources, but its own diode 25 will be non- conductive and the input current to amplifier 27 will be below the threshold level. The corresponding relay 12 will then not be energized, and its contact 29 will fall off to light a lamp 31. The current sources may represent physical values to be measured, e.g. pressure, temperature, numerical quantity or resistance. Threshold amplifier (Fig. 1) -The current passes via terminals 7, 8 through the baseemitter junction of a transistor 1 whose input resistance is high for low currents and vice versa. If the current through the collector load 2 is high enough to turn on Zener diode 3, transistor 9 will conduct, turning on 10 and cutting off 11 of the Schmitt trigger so that relay 12 is not operated. As the input current falls, the Zener diode is cut off and transistor 9 then acts as a linear amplifier and its output eventually becomes too low to allow conduction in 10. The Schmitt trigger then changes over and relay 12 is energized.
Patent GB-974750-A (GB)
Title: Improvements in forming semiconductor devices
IPC: H01L29/00
Filed: 1961-03-13
Abstract: A tunnel diode is formed by epitaxially depositing, in a closed container, a layer of semi-conductor of one conductivity type on a substrate of the opposite conductivity type by vapour deposition from a gaseous compound of the semi-conductor element and a transport element as in the parent Specification, the resulting junction being heat treated, either before, or during, the alloying of ohmic contacts thereto, to increase the ratio of peak to valley currents of the current voltage characteristic of the diode.  In examples, germanium is deposited on germanium or gallium arsenide bodies which are then heat treated for 20 seconds-10 minutes at 665  DEG C.
Patent GB-1275651-A (GB)
Title: Liquid filter assemblies
Inventor: BUCKMAN KENNETH ERNEST
IPC: B01D27/08
Filed: 1969-02-20
Abstract: 1275651 Disposable filter GENERAL MOTORS CORP 12 Feb 1970 [20 Feb 1969] 9238/69 Heading B1D A disposable, integral housing filter for the lubrication circuit of an I.C. engine comprises an end plate 10 with a threaded neck 17 adapted to screw on to a spigot 3 on the engine, and an annular, elastomeric washer 20 having an inwardly directed wedge-section flange 25 which engages the thread on spigot 3 (Fig. 3) to provide a seal. Flange 25 may be axially slit (26) enabling it to fill one turn of the spigot thread. Washer 20 also provides a non-return valve 21 adjacent inlets 16, and a by-pass valve 24 engaging a plastics sleeve 30 but deformable inwards therefrom under sufficient pressure. Axially pleated, annular, resin-impregnated paper filter element 7 has its pleat ends individually sealed and is removably clamped between the upper flange 38 of sleeve 30 and a lower end cap 40 with resilient arms 41 on a helical spring. Stud 33 connects sleeve 30 to end cap 40, or the stud could be on the end cap. Sleeve 30 has external grooves which deliver filtrate from the interior of element 7 to perforations 32 whence it flows to outlet 11. The upper edge of sleeve 30 is castellated, and flange 38 carries studs 39 to allow unfiltered oil to act on the by-pass valve.
Patent GB-1028237-A (GB)
Title: Alpha-adamantanoxy carboxylic acid and derivatives
IPC: C07C59/13
Filed: 1964-03-05
Abstract: The invention comprises compounds of the general formula <FORM:1028237/C2/1> wherein R1 is hydrogen, an alkyl radical of at most 5 carbon atoms or a phenyl, p-chlorophenyl or 3,4-methylenedioxyphenyl radical, R2 is hydrogen or an alkyl radical containing 1-4 carbon atoms or R2 may be bound to an alkyl radical R1 to form an alkylene radical having 2-7 chain members and 2-9 carbon atoms, and R3 represents an alkyl radical of 1-5 carbon atoms, a hydrogen atom, a monovalent cation or the normal equivalent of a polyvalent cation, and the preparation thereof either by reacting a reactive ester of 1-adamantanol with a compound of the general formula <FORM:1028237/C2/2> wherein R3 is an alkyl radical and wherein R1 and R2 have the meanings given above, or a metal derivative thereof, and, if desired, hydrolysing the a -(adamant-1-yloxy)-carboxylic acid alkyl ester obtained to the free acid or to a salt, and, if desired, converting the free acid or salt into another salt with an organic or inorganic base, and, if desired, resolving a racemic acid into its antipodes, or by reacting a reactive ester of a hydroxyl compound of the last general formula above, wherein R1, R2 and R3 have the meanings given in the first general formula above, with a reactive salt of 1-adamantanol, e.g. its alkali metal salts which may be formed in situ, preferably in the absence of air.  Pharmaceutical preparations having choleretic and fungistatic activity comprising a compound of the first general formula above and an inert diluent.