baber/WOPTO huggingface dataset:
Patent GB-774394-A (GB)
Title: Manufacture of therapeutically valuable hydantoin derivatives
Filed: 1954-03-23
Abstract: The invention comprises hydantoin derivatives of the formula <FORM:0774394/IV(b)/1> where R1 is an aromatic hydrocarbon residue containing at least 3 condensed nuclei and R2, R3 and R4 may be hydrogen or alkyl groups.  The products are made by treating a compound of the general formula <FORM:0774394/IV(b)/2> with an ammonium carbonate (i.e. including ammonium bicarbonate) and an alkali metal cyanide, and optionally alkylating the hydantoin formed. The group R1 is preferably a phenanthrene radical.  In examples: (1) 2-acetylphenanthrene is heated with potassium cyanide and ammonium bicarbonate in ethyl alcohol to give 5-(21-phenanthryl)-5-methylhydantion; (2) 3-acetylphenanthrene is condensed as in (1) to give 5-(31-phenanthryl)-5-methylhydantion; by similar methods 5-(21-fluorenyl) - 5 - methylhydantion and 5 - (31 - pyrenyl) - 5 - methylhydantion are prepared; (3) 5-acetylacenaphthene is condensed as in (1) to give 5 - (51 - acenaphthenyl) - 5 - methylhydantion and (4) the product of (2) is methyllated with dimethyl sulphate to give 5-(31-phenanthryl)-3 : 5-dimethylhydantion.
Patent GB-883442-A (GB)
Title: Improvements in or relating to frequency divider circuit arrangements using transistors
IPC: H03K3/282
Filed: 1959-03-12
Abstract: 883,442. Transistor pulse frequency-dividing circuits. FERNSEH G.m.b.H. March 12, 1959 [March 12, 1958], No. 8566/59. Class 40(6). A pulse frequency divider comprises two transistors 11, 21 reciprocally coupled through series resistor-capacitor combinations 16, 14 and 26, 24 to operate as a free-running multivibrator circuit, the junctions of the resistor 16 and capacitor 14 and of the resistor 26 and capacitor 24 being connected through diodes 9, 10 respectively to the output of a differentiating circuit comprising capacitor 7 and resistor 8 to the input of which the rectangular-pulse waveform whose frequency is to be divided is applied. Assuming, for example, that transistor 11 is conducting and bottomed while transistor 21 is non-conducting, negative spikes arising from the differentiated input waveform V1 will be applied through diode 9 and capacitor 14 to the base electrode of transistor 21; no pulses are passed by diode 10 which is blocked off by the large negative potential appearing at the collector electrode of transistor 21. Since transistor 21 is cut off, its base is at a positive potential which is decaying exponentially towards -E 1 ; when it falls to a value such that the application of a negative spike reduces the base potential to zero, transistor 21 conducts and transistor 11 is cut off owing to the cumulative effect of the positive feedback between the two transistors. The base electrode of transistor 11 is now at an exponentially decaying positive potential and negative spikes are applied thereto through the diode 10 and capacitor 24 until its potential reaches such a value that the spike is able to cause transistor 11 to conduct whereupon transistor 21 is rendered non-conducting once more. In the arrangement illustrated the component values are so chosen in relation to the applied input voltage waveform that transistor 21 remains non-conducting for the period covered by three negative voltage spikes while transistor 11 remains non-conducting for a period covered by two such spikes so that the circuit effects an overall frequency-dividing ratio of 5. In the circuit illustrated starting is ensured by switching on the collector voltage -E before the base bias voltage -E1. In an alternative arrangement, Fig. 5 (not shown), the resistor 5 is returned to a tapping point on the collector resistance 15 to provide some asymmetry in the circuit and thereby ensure starting. Fig. 1 shows a circuit not falling within the scope of the invention comprising a freerunning multivibrator to which the input pulse waveform is applied through capacitors 2 and 3 which are chosen to have such values in relation to the resistors 4, 5 that differentiated pulses appear at the bases of the transistors 11, 21, these being amplified by whichever transistor is conducting and applied to the base of non-conductive transistor to control the instant at which it commences conducting.
Patent GB-198138-A (GB)
Title: Improvements in or relating to metal pump mechanism for typecasting machines
IPC: B41B7/04
Filed: 1922-03-25
Abstract: 198,138. Reed, F., and Davis, G. H. March 25, 1922. Metal pots and pumps.-Relates to (1) pumpstop mechanism to prevent splashing of the metal in case the mould does not close properly, and (2) adjustable pump-wells. (1) The piston-lever 1 of the pump is pivoted to the side of a standard 2, which guides the pump-rod, or to a bearing at the side of the metal-pot. The pump-rod 7 is guided in a box-head 6, which is large enough to permit withdrawal of the pump 3 after the cover 6* has been removed. The lever 1 has a slotted engagement with its pivot to enable it to be withdrawn from engagement with the pump-rod. The pump is adapted to be locked by a sliding bar 8 having a projection 16, which is normally clear of, but can be moved beneath, a screw 17 on the pumplever 1. The bar 8 carries an adjustable member 12, which is engaged by a projection on the top mould-block 15, when the mould fails to close properly. (2) The metal-pot has an interchangeable smooth-surfaced flanged well 18, Fig. 2.
Patent GB-967007-A (GB)
Title: Improvements in or relating to the recovery of beryllium values from beryl-containing ores
Inventor: ISAACS SAUL RAYMOND
IPC: C01F3/00
Filed: 1962-03-07
Abstract: Beryllium values are recovered from beryllium ores by treating the fused and quenched or the sintered ore with sulphuric acid and simultaneously or subsequently leaching the sulphated ore with a mixture of ethanol and water containing 70 to 95% by weight of ethanol. An excess of sulphuric acid e.g. 33% by weight, is used above that necessary to convert to their sulphates all the metal oxides contained in the beryl.  The leaching may be effected either by heating the sulphated material under reflux with an 85% ethanol water mixture or by grinding the sulphated material in a ball mill at ambient temperature, with a 75% ethanol water mixture.  Ratios of leach liquid to ore are given as 200 mls. ethanol/water to 5 gms. ore, 100 mls. ethanol/water to 5 gms. ore, or 50 mls. ethanol/water mixture to 5 gms. ore according as to whether the ore is leached by reflux, by ball milling, or simultaneously with the sulphation.  The sulphated ore is heated prior to leaching to render the silica content insoluble, or when simultaneous leaching is employed, the leach liquid is evaporated the residue heated to render the silica insoluble and the beryllium values extracted with water.  The residual ore after leaching may be subjected to a further leaching with an ethanol/water mixture, and the acidity of this mixture may be adjusted to a pH of 2 by the addition of sulphuric acid.
Patent GB-1211801-A (GB)
Title: Benzothiazole hair dyeing compositions
Inventor: KALOPISSIS GREGOIRE
IPC: D06P1/41
Filed: 1968-02-22
Abstract: 1,211,801. Hair dyeing compositions. L'OREAL. 22 Feb., 1968 [22 Feb., 1967], No. 8765/68. Heading D1B. A composition for dyeing keratinic fibres comprises as active compound, at least one compound of the formula:- wherein R represents C1-4 alkyl, R1 represents H or C1-4 alkyl; R2 represents H, C1-4 alkyl or a carboxylic acyl radical, or R1 and R2 together with the N atom to which they are attached form a saturated heterocyclic radical; and n is an integer from 2 to 6; or a mono- or bis-quaternated compound obtained by quaternation of the above compounds with a C1-4 alkyl halide or dimethyl sulphate, and hydrates thereof. The composition may also contain other dyes normally used in dyeing hair and conventional cosmetic adjuvants. Examples are given in which hair dyeing compositions are prepared.
Patent GB-117109-A (GB)
Title: Improvements in and relating to "Safety" Razors.
Inventor: PHILLIPS ROBERT EDWARD
IPC: B24D15/08
Filed: 1917-12-10
Abstract: 117,109. Phillips, R. E., (MeLeod, D. G.). Dec. 10, 1917. Stropping-apparatus.-In a safety razor of the kind in which the blade is so mounted that it can be stropped without removal from its holder by a strop inserted between the blade and the grill, the blade being thrown over at each end of the stroke of the razor upon the strop, the blade is caused to move laterally across the strop when it is moving longitudinally. The spindle a, on which the holder b of the blade c is mounted and which is geared to the friction roller c, has a screw-thread of quick pitch formed upon it. and the bearing part b<1> is narrower than the holder to allow it to have the desired lateral travel along the spindle.
Patent GB-577124-A (GB)
Title: Improvements in or relating to insecticidal preparations for use in buildings
IPC: A01N25/34
Filed: 1944-05-09
Abstract: 577,124. Adhesive coatings. RENTOKIL (SALES), Ltd., and HICKIN, N. E. May 9, 1944, No. 8790. [Class 140] Paper or other flexible strip is coated on one side with a pressure-sensitive adhesive such as a rubber-rosin mixture in which is incorporated an insecticidal substance or substances, e.g., pyrethrum flowers or the substance known under the Registered Trade Mark "Lethane 384." The paper is intended to seal cracks in which insects are hiding.
Patent GB-104105-A (GB)
Title: An Improved Device for Straining or Tensioning Wires, Cables and the like.
Inventor: HARDY BASIL HOWARD
IPC: B64C3/00
Filed: 1916-06-22
Abstract: 104,105. Hardy, B. H., and Redrup, A. L. June 22, 1916. Wire-strainers, specially suitable for tensioning the stays of aeroplanes, of the kind comprising a straining-lever c to the short end d of which one of the wires b is connected, the other wire a passing around the bend of the lever. In order to increase the tension when the long arm is bent back against the wire, an abutment i is provided which presses the wire b away from the lever. The arm e is formed with a detent g, over which the ferrule f is passed, and a pin or split ring is inserted through the hole h a; an additional safe. guard.
Patent GB-1380973-A (GB)
Title: Process for the manufacture of polymers containing coo-silyl groups which can be shaped
IPC: C08G73/10
Filed: 1972-02-25
Abstract: 1380973 Silylated polyamide acids CIBAGEIGY AG 25 Feb 1972 [26 Feb 1971] 8838/72 Heading C3R Polymers containing COO-silyl groups soluble in dimethyl sulphoxide, N,N-dimethyl form- or acet-amide and N-methylpyrrolidone; and consisting substantially of identical or different structural units  where A is a divalent organic radical, R is such a radical containing a 5- or 6-membered ring, the COX groups are each on different ring C atoms which are adjacent to a carbonamide group, n is 1 or 2, each of X 1  and X 2  are OH or OSiR 1 R 2 R 3 , at least one being the latter in at least one unit, and R 1  to R 3  each being a substituted or unsubstituted C 1-12  alkyl, C 1-4  alkoxy, cycloalkyl, aryl, aralkyl or aryloxy radical are obtained by reacting the corresponding polyamide acid (i.e. wherein X 1  and X 2  are OH), of inherent viscosity 1 to 4 dl./g. (at 25 C. in N,N- dimethylacetamide), or a partially cyclized derivative thereof with one of 12 defined classes of silylating agent in an amount that at least one of the free COOH groups but none of the amide groups is silylated. The defined classes of silylating agent fall within the general formula E(SiR 1 R 2 R 3 ) p  where p is 1, 2 or 4 and E is either an organic radical containing one or more O or N atoms through which it is linked to Si, or (if p is 1) Ha. Some silylate carbonyl groups preferentially but can also silylate amide groups and must therefore be used in limited amounts, others can silylate carboxyl groups only but not amide groups and these are preferably used in excess. The silylated polyamide-acids are stated to be more soluble and more resistant to room temperature cyclization than the unsilylated polyamide-acid; numerous solvents therefor are specified. Extensive lists of polyamideacid forming reactants and silylating agents are given and also of possible additives and applications (being in general those conventional for polyamide acids). Reference is made to Specification 1,076,722.
Patent GB-161172-A (GB)
Title: Umbrella ring
IPC: A45B25/12
Filed: 1921-03-22
Abstract: 161,172. Nobili, F. P. de. March 22, 1921. Holding closed.-A flat metal band or ring is adapted to slide over stretchers 7 of an umbrella when closed, thereby compressing the stretchers against the stick 9 ond thus keeping the umbrella neatly closed. The band has a hinge 5 and overlapping ends 6 so that it may be detached, while a pair of fingers 2 fitting between the stretchers act as guides on the stick and also retain the band when the umbrella is open. This is said to eliminate, the necessity of rolling the cloth around the ribs to keep them closed and also protects the ribs against breakage.
Patent GB-399178-A (GB)
Title: Improvements relating to sash windows
IPC: E06B3/44
Filed: 1932-03-24
Abstract: 399,178. Renewing sash cords. COX, J. H., Russet Cottage, Old Exeter Road, Tavistock, Devon. March 24, 1932, No. 8855. [Class 20 (iii).] The inner lining and bead a of a sliding-sash window and a pocket piece opposite the upper sash are removable or preferably hinged to facilitate renewal of the sash cords or removal of the lower sash for painting &c. and the knotted sash cord is removably secured in an upwardly inclined recess d<1> of the cord groove, the end of the cord e<1> hanging in a continuation of the groove. A covered aperture in the pulley stile provides access to the cord groove of the upper sash. The parting bead may be tapered to facilitate removal of the upper sash for painting. The meeting rail of the upper sash is bevelled at the ends to facilitate removal of the parting bead.
Patent GB-1158206-A (GB)
Title: Improvements in Transportation of Lorry-Mounted Crane Booms.
Inventor: CHEVASSUT ROBERT CHRISTOPHER
IPC: B66C23/36
Filed: 1967-02-24
Abstract: 1,158,206. Jib cranes. RUSTON-BUCYRUS Ltd. 12 Feb., 1968 [24 Feb., 1967], No. 8865/67. Heading B8B.  A Multi-sectioned crane boom is mounted on a lorry having a drivers cab 14, at its front end and a crane operators cab 15 at its rear end, the bottom section of the boom being mounted on the base of the crane structure and the intermediate sections being supported by trestles 17, 18 on the lorry. The cab 15 is mounted on a turntable 16. The trestle 17 consists of bolsters 19 and double-acting shock absorbers 20, the bolsters having pivots 21 to which is connected a support frame 22. The trestle 18 consists of anchor frames 24 pivoted to the lorry and to each other to form a triangular structure, and tie bars 26 are pivotally connected at 25 to the trestle. The frames 24 can be folded down, to permit full-circle operation of the crane, by disconnecting the frames from each other. The bottom section of the boom is used to position the intermediate sections on the lorry.
Patent GB-926039-A (GB)
Title: New azo dyestuffs containing sulphoaryloxy-substituted triazine rings
Inventor: BARKER PETER WILLIAM
IPC: C09B62/085
Filed: 1960-03-14
Abstract: The invention comprises azo dyes of formula <FORM:0926039/IV(a)/1> wherein A is a mono- or poly-cyclic radical of the benzene series, E is a 1:4-phenylene or -naphthylene radical, n is an integer and R is a sulphonated phenyl or naphthyl radical.  Preferred dyes are those of formula <FORM:0926039/IV(a)/2> wherein n and R are as defined above, X is a chlorine atom or a nitro or acylamino group and the ring B may be substituted by chlorine atoms or by methyl, methoxy or acetylamino groups.  The dyes are prepared by condensing a cyanuric halide with 1 mole of an aminoazo compound of formula <FORM:0926039/IV(a)/3> and with 2 moles of a sulphonated phenol or naphthol.  The dyes may be used to colour cellulose, wool, silk, polyamide and polyacrylonitrile and polyester fibres.  The dyes are preferably used as reactive dyes for cellulose giving yellow shades in the presence of an acidbinding agent.  The preparation of the dyes and their use in dyeing is described in examples.  Specifications 846,765 and 857,186 are referred to.
Patent GB-579641-A (GB)
Title: Improvements in or relating to remotely controlled mechanism for effecting the successive release of articles such as depth charges
IPC: F41F5/04
Filed: 1940-05-18
Abstract: 579,641. Laying depth charges &c. BRITISH POWER BOAT CO., Ltd., COOKSEY, G., and JAGGARD, R. W. May 18, 1940, No. 8896. [Class 9 (ii)] Apparatus for the successive, release of depth charges &c. from a launching shoot or rack on a boat, from a remote control-point, comprises long-stroke ratchet mechanism operaing release cams, and endwise-movable connections with the control handle. Two shoots for releasing depth-charges over the rear transom 10 of a boat are shown in plan in Fig. 1, each shoot being constructed to carry two depth - charges, the four charges being released in succession, those carried by the port shoot being released before those on the starboard shoot. The charges are held on the shoots by V-form wire strops, the outer ends of which are fixed to brackets 17 while the inner or apex ends are connected by shackles 18, Fig. 4, to the release hooks 19, 20 of scissors form. Rollers 23 on the hooks bear against cams 24 on longitudinal cam-shafts 25 adapted to be rotated stepby-step by gearing 34, 36 driven through an endless chain 39 by a single ratchet gear 43, 49. The cams on each shaft 25 are axially displaced so that the hooks are released in succession, and the pinion 34 of the starboard shaft 25 is connected to the shaft by a 90-degrees lostmotion connection so that its operation follows that of the port shaft. The ratchet pawl 49 is pivoted to a. slidable rod 45, the operative stroke of which is made against the pull of a spring 53 by a rod-and-cable transmission 52 actuated by a remote handle 59, Fig. 5. The handle also imparts a step-by-step advance to a dial 61 whereby the number of charges released is indicated at an aperture 74 in the casing 71. For re-setting the cam-shafts or for effecting release of the charges by handles 27 on the inboard ends of the shoots, the pinions 34 are disengageable from the pinions 36 by sliding movement imparted to them by forks 35 on shafts 37 rotated by hand-wheels 38.
Patent GB-550658-A (GB)
Title: Improvements in or relating to the production of cellulose esters
IPC: C08B3/16
Filed: 1941-07-15
Abstract: 550,658. Cellulose derivatives. DREYFUS, H. July 15, 1941, No. 8933. [Class 2 (ii)] Mixed esters of cellulose are obtained by esterifying an organic 'acid ester of cellulose, containing free hydroxy groups, in a liquid medium comprising an organic acid anhydride and a halogenated hydrocarbon and containing in solution an acidic metal halide as catalyst, the liquid medium employed being one which on completion of esterification: yields a liquid medium which is a solvent for the mixed ester formed. The process of Specification 543,311 is excluded. Preferably the liquid medium is also a solvent for the cellulose ester used as starting material. If the catalyst is not soluble in the mixture of halogenated hydrocarbon and anhydride, there is added sufficient acetone or other suitable organic liquid to give a medium which is a solvent of the catalyst. The starting material may be a lower aliphatic ester of cellulose containing free hydroxy groups and more than one, e.g. 1.5 - 2.5, acetyl or other acid radicals per glucose unit. Cellulose esters containing formyl, propionyl, butyryl, or glycollyl radicals may be treated. The further esterification may be continued until a fully esterified product is obtained or it. may be stopped while the ester still contains some free hydroxy groups. Preferably, the reaction is first allowed to take place at a warm temperature for a short period and is completed at a lower temperature, e.g. 25‹-35‹C. Ferric, stannic, or zinc chloride, may be used as catalyst, if desired with hydrochloric acid. The mixed esters obtained may contain stearyl, oleyl, or benzoyl radicals. Esters containing radicals of two lower fatty acids, e.g. cellulose aceto-propionate or butyrate, or cellulose propionate - butyrate, may be obtained. The mixed ester may be obtained in the solid state by mixing the esterification solution with hot water or a hot aqueous solution of an organic acid in which the halogenated hydrocarbon and the ester are insoluble so as to evaporate off the halogenated hydrocarbon, thus simultaneously effecting separation of the product, the main inert diluent, and the water-miscible constituents of the esterification solution. Organic acid in the aqueous fraction may be extracted by washing with halogenated hydrocarbon and recovered by fractional distillation. Ethylene or methylene dichloride may be used as the halogenated hydrocarbon.
Patent GB-685318-A (GB)
Title: Mechanical saw
IPC: B27B17/08
Filed: 1950-04-11
Abstract: 685,318. Chain saw. WIIG, R. K. A. April 11, 1950 [April 9, 1949], No. 8950/50. Drawings to Specification. Class 145 (ii). [Also in Group XXIV] A chain saw of the portable wood-felling type, having a self contained motor driving a chain saw rotating round a guide plate is powered by a high speed mixture-compressing internal combustion engine with hot-bulb ignition or compression ignition. The cylinder is in the longitudinal plane of the saw, and the fuel is fed from a pressurised tank. A safety clutch (see Group XXIV) is fitted to safeguard the apparatus from overload and inadvertent startings. A speed control is fitted to the motor.
Patent GB-1275671-A (GB)
Title: Digital to analogue converter
Inventor: BARRETT JOHN ALBERT
IPC: H03M1/00
Filed: 1969-02-19
Abstract: 1275671 Digital - to - analogue converter PLESSEY TELECOMMUNICATIONS RESEARCH Ltd 22 April 1970 [19 Feb 1969] 9090/69 Heading G4H A digital-to-analogue converter, employs capacitors, and operates on a floating point system, in which the multiplicative factor is determined by the three most significant digits. The coding operation commences with the least significant digit, if the digit is a 1 the switches S1 to S3 operate to charge capacitor C1, and switch S4 then operates to share the charge with capacitor C2. If the digit is a 0 no charge is stored. If the second digit is a 1 C1 is charged, if it is a 0 no charge is stored on C1, subsequent to this operation the charges on C1 and C2 are shared, at this stage the value of the unit is ¢CV, where the initial charging voltage is 2CV and the capacitance of C1 and C2 are each C. The operation is then repeated for the third digit so that at this stage the value of the unit becomes “CV. If all the succeeding digits, i.e. the three most significant digits are zero the charge on C2 is unaltered, if however one of the three most significant digits is a 1 then a charge of 2CV is placed on C1 and shared with C2 prior to the following operations. If the fourth digit is a 1 the charge on Cl and C2 remains unaltered, if however the fourth digit is a 0 the charge is halved. By making use of capacitors C3 and C4 which have capacitances equal to threetimes, and fifteen times the capacitance of C1 and C2 the charges on capacitor C2 may be reduced by factors of 4 and 16, if the fifth and sixth digits are 0. In this way a six bit binary digit is reduced to an analogue voltage on capacitor C2 in a non-linear fashion. The output from the digital-to-analogue converter may be read out by means of a long tail pair charging a capacitor, or by means of a MOST electrometer operating in a voltage follower mode, or by means of a chopper amplifier. The switches employed throughout the digital-toanalogue converter are MOSTs.