baber/WOPTO huggingface dataset:
Patent GB-743191-A (GB)
Title: Improved apparatus for raising or forcing liquids by gaseous pressure
Inventor: ROTHWELL ERNEST
IPC: F04F1/06
Filed: 1952-11-10
Abstract: 743,191. Raising liquids by gaseous pressure. THACKRAY, Ltd., C. F. Feb. 5, 1954 [Nov. 10, 1952], No. 28246/52. Class 102(2). In apparatus for raising liquids by gaseous pressure, a container 2 is fitted with inlet and outlet valves 5, 6 for the liquid, an inlet valve 14 for the pressure gas, and an exhaust valve 8 which is formed on the stem 7 of a float 10 ; the valve 14 is actuated by a lever 15 which co-operates with a collar 9 on the stem 7. In order to balance the exhaust valve 8, to reduce the force necessary to open it, a rod 25 is attached to a piston 17, loaded by a spring 24, and subjected through pipe 23 to the pressure in the container 2. When the container 2 is being filled, the rod 25 is held in the inoperative position, and when being emptied, the rod 25 abuts the valve 8 and transmits a force according to the gas pressure.
Patent GB-283482-A (GB)
Abstract: 283,482. Durand & Haguenin Akt.- Ges. Jan. 10, 1927, [Convention date]. Azo dyes.-Brown mordant dyestuffs are obtained by diazotizing an aminoazo compound of the type R<1>-N=N-R<2>.NH2 in which R<1> is an aromatic residue containing a hydroxyl group in o-position to a carboxyl group, and R<2> is an aromatic residue containing a sulphonic or carboxyl group, and treating the resulting diazoazo compound in an alkaline or acid medium at ordinary or a raised temperature until its coupling power has disappeared. The following examples are specified :-(1) The dyestuff obtained by reduction of the nitro group of the dyestuff p-nitraniline-o-sulphonic acid # salicylic acid is diazotized, the diazoazo compound is stirred with dilute ammonia at ordinary temperature until the blue colour disappears, and the solution is acidified to precipitate the final dyestuff. The product yields a fast reddish brown tint when chrome printed on cotton. (2) The diazoazo compound in (1) is boiled with dilute hydrochloric acid until a sample no longer yields a blue colour with ammonia. The product yields a yellower tint in chrome printing than that according to (1). (3) The acetyl group of the dyestuff 4-acetylaminoaniline-2-sulphonic acid # mcresotinic acid is saponified, and the product is diazotized. The diazoazo compound is stirred with dilute ammonia at ordinary temperature until the blue colour disappears, and the final dyestuff is precipitated by acid. The product yields a redder tint in chrome printing than that according to (1). (4) The dyestuff obtained by nitration of the dyestuff anthranidic acid # salicylic acid and reduction of the nitro group is diazotized, and the diazoazo compound is stirred with dilute ammonia at ordinary temperature. The final dyestuff is isolated as an alkali salt and yields a yellower tint in chrome printing than that according to (1).
Patent GB-656862-A (GB)
Title: Improvements in the manufacture of polymers
Filed: 1948-11-02
Abstract: Polymers and copolymers of substances of the type <FORM:0656862/IV (a)/1> where R1 is hydrogen or an alkyl group, R2 is an aryl, nitrile, -COOR3 or -OOCR3 group and R3 is an alkyl group, are made by agitating a mixture comprising one or more of the monomers, admixed, if desired, with another copolymerizable monomer, dispersed in aqueous media with a polymerization catalyst, e.g. in a redox system, and optionally an emulsifying agent, a buffering agent, e.g. sodium bicarbonate, and an emulsion stabilizer, until the monomers are polymerized to a stage at which a stable dispersion is formed and completing the polymerization by flowing the stable dispersion through a tubular reaction zone maintained at the polymerization temperature. Specified monomers of the above type are styrene, methyl acrylate, methyl and ethyl methacrylates, and vinyl acetate.  The copolymerizable monomer may be butadiene, an ester of maleic or fumaric acid, trans-dichlorethylene, or an allyl ester of an aliphatic monocarboxylic acid.  The polymerization catalyst may be a peroxy compound such as an ammonium or alkali metal persulphate, hydrogen peroxide or t-butyl hydroperoxide, optionally mixed with a reducing agent such as an alkali metal salt of a thiosulphate, sulphite or hydrosulphite, or hydroxylamine.  The emulsifying agent may be a sulphonated long-chain aliphatic alcohol, acid or amine or salt, e.g. sulphonated turkey red oil.  The emulsion stabilizer may be gum tragacanth, gelatine, glue, methyl cellulose, polyvinyl alcohol or a water-soluble partially-hydrolysed polyvinyl acetate or a mixture.  The process may be carried out in a continuous manner.
Patent GB-1243875-A (GB)
Title: Device for protecting needles in knitting machines
IPC: D04B35/18
Filed: 1969-06-05
Abstract: 1,243,875. Knitting - machines. ELITEXZAVODY TEXTILNIHO STROJIRENSTVI GENERALNI REDITELSTVI. 5 June, 1969 [26 June, 1968], No. 28390/69. Heading D1C. A stop motion device active upon build up of yarn on the needles, a defective latch or uncut yarn comprises a feeler having active and guiding parts 7, 6 respectively joined by an elastic member, e.g. a spring 9. The feeler is biased in its casing 5 outwards of the needle cylinder by a spring 10, but is held in its active position by engagement of a detent 14 in a recess 11. If the part 7 is deflected by any of the adverse conditions noted the dentent is disengaged and the feeler springs outwards. Contacts 12 on the feeler make with contacts 15, 16.
Patent GB-381721-A (GB)
Title: Improved process for manufacturing hollow elements for constructions, in cement, concrete and the like
IPC: B28B7/32
Filed: 1931-10-13
Abstract: 381,721. Moulding pipes, beams, and other hollow articles. ARTOIS, J. M. D', 15, Grand Place, Brussels. Oct. 13, 1931, No. 28435. [Class 87 (ii).] In processes for moulding hollow elements, such as pipes, of cement, concrete, or like mortar, using expansible cores of rubber or other resilient material, a tube 2 forming a core is laid on a bed of mortar and its open ends are held upright. The tube is expanded by filling with liquid and the horizontal portion is submerged in the mortar, the pressure due to the vertical columns retaining it expanded. When the mortar is hard, the tube is emptied and withdrawn as by a cable 4. The tube 2 is made of rubber and is flexible but not extensible, the flexibility allowing bent pipes to be moulded. The tube may be reinforced by fabric. A number of pipes may be formed in one cast. Floors may be constructed from cement beams each beam having longitudinal hollow passages formed in the manner before described. The beams may be reinforced by embedded iron bars which may be so disposed as to facilitate joining.
Patent GB-427401-A (GB)
Title: Improvements in or relating to friction grip fastenings
IPC: E05C17/22
Filed: 1933-10-16
Abstract: 427,401. Friction - grip fastenings. CORNER, G. H. C., 507, Walsall Road, Perry Barr, and FLETCHER, O. E., 13, While Road, Sutton Coldfield, both in Birming- ham. Oct. 16, 1933, No. 28640. [Class 44] In a friction-grip fastening of the kind in which a sleeve &c. open at both ends is retained in any desired position on a tube &c. by means of a flexible gripping member attached to and housed in the sleeve and fitting the tube &c. closely. The gripping member 7 on the tube 1 is kept extended by a light spring 12 arranged between a collar 4 on the fixed end of the member 7 and a collar 8 on its free end. The collar 4 is screwed into the housing sleeve 2, and the collar 8, which slides on the tube 1, is connected by a screw 9 to an external collar 11 slidable on the sleeve 2. If the collar 8 is moved towards the collar 4 by means of the collar 11, the grip of the member 7 is eased, and the sleeve 2 may be slid along the tube 1. In another form two members 7 are used, with their free inner ends adjacent, and the releasing collar between them. The device may be embodied in a window stay, the tube I being pivoted to the window, and the sleeve 2 to the frame. In another form, the releasing device comprises two sleeves sliding on the sleeve 2 and pressed apart by a spring.
Patent GB-754185-A (GB)
Title: Multiplex frequency modulation transmitter
IPC: H04J3/10
Filed: 1954-10-05
Abstract: 754,185. Multiplex radio signalling. ARMSTRONG, E. M., [Representative of ARMSTRONG, E. H.]. Oct. 5, 1954 [Oct. 12, 1953], No. 28661/54. Drawings to Specification. Class 40 (5). In an F.M. multiplex system an oscillation f 1  is frequency modulated by a main channel signal applied to a phase-shift modulator, frequency multiplied to a mean frequency nf 1  and applied to a frequency converter, and the oscillation f 1 , without modulation, multiplied to the same frequency nf 1 , beat with a second oscillation f 2  to form a carrier frequency (nf 1 Œf 2 ), and the latter frequency modulated in a second phase shift modulator by a second signal channel and also applied to the frequency converter so that a carrier of centre frequency f 2 , frequency modulated by both the main and auxiliary channels is obtained. This may be further frequency multiplied before transmission. A plurality of auxiliary channels, each a frequency modulated subcarrier of different centre frequency, may be applied to the second phase shift modulator, or an additional channel, not frequency modulated, may be added to a subcarrier applied to the second phase shift modulator. The phase shift modulators are preferably of " Serrasoid " type, employing a sawtooth wave to generate a pulse time modulated by the channels. Bandpass filters in the main and auxiliary channels may limit the frequency deviation to avoid cross-modulation of channels, and compensa; tion networks with rising frequency characteristics may counteract attenuation of the higher frequency deviations. At the receiver high pass filters separate the auxiliary channels. Specifications 621,228, 668,030 and 752,628 are referred to.
Patent GB-927391-A (GB)
Title: Improvements relating to ferroelectric ceramic compositions and articles
IPC: C04B35/51
Filed: 1959-08-24
Abstract: 927,391. Piezo-electric elements. CLEVITE CORPORATION. Aug. 24, 1959 [Aug. 25, 1958 (2)], No. 28808/59. Class 40 (8). [Also in Group V] A ferro-electric ceramic composition for electromechanical transducers consists of a lead zirconate stannate titanate solid solution selected from within the area ABCD of Fig. 3 and containing in the aggregate 0.05-5% by weight of the oxides of at least one member of each of the groups consisting of (1) tantalum and niobium, and (2) yttrium and the rare earths excluding cerium. Up to 20 atom per cent of the lead may be replaced by calcium and/or strontium and the basic composition is expressed by the empirical formula where in mol traction: The composition is fired to form the active element 12 of an electromechanical transducer 10. Electrodes 14 and 16 are attached to the element 12 and leads 20 and 22 are soldered to the electrodes and connect the transducer to an electrical or electronic circuit. The Specification discloses several examples of different compositions and their electrical and electromechanical properties such as the relative dielectric constant, the planar piezo-electric coupling coefficient and the dielectric loss at 1 kc. Specifications 818,710, 843,919, 843,920 and 885,994 are referred to.
Patent GB-205348-A (GB)
Title: Improvements in heat-insulating fabrics and process of manufacturing same
IPC: E04C2/16
Filed: 1922-10-24
Abstract: 205,348. Long, J. de. Oct. 24, 1922. Drawings to Specification. Non-conducting coverings for heat.-The heatinsulating material for use in buildings, railroad cars &c. described in Specification 205,347 is modified by making the central sheet of a non- inflamable woven fabric such as burlap.
Patent GB-1347760-A (GB)
Title: Polarization interferometer
IPC: G01N21/19
Filed: 1971-06-21
Abstract: 1347760 Measuring optical dichroism CARY INSTRUMENTS 21 June 1971  [22 June 1970] 28934/71 Heading G1A The variation of linear or circular dichroism of a sample with wavelength is measured by Fourier spectroscopy. Light from a broadband source of light 10 is collimated at 11 and polarized linearly (28) by device 26. The light is then passed through a Mach-Zehnder interferometer comprising beam splitter 30 and two mirror systems 38, 35, the first of which is movable with respect to the second. The intention is to produce in the recombined beam two components 43, 49 whose polarization directions are orthogonal and which do not fluctuate in intensity. The effect of motion of mirror system 38 is progressively to retard in phase the component 49 with respect to the other and produce an alteration in the effective polarization of the combined beam through the repeated cycle from left circularly polarized (LCP) 101 through right circularly polarized (RCP) 105 and back to 101, Fig.4. This provides for cyclically and alternately LCP and RCP light to be presented to a sample 14 for the measurement of circular dichroism and right plane and left plane polarized light for the measurement of linear dichroism. To measure spectral variations in these quantities, advantage is taken of the fact that the frequency at which the phase retardation of component 49 takes place varies with the wavelength of the light. Thus, by an analysis of the frequency components in the signal produced by photo-detector 15, a dichroism spectrum may be produced. The detector circuitry includes amplifier 19, connected to analog to digital converter 20 to allow analysis by computer 23 of the detector output. The computer also receives information in the form of a demodulation cosine (for linear) or sine (for circular dichrosim) function in order to derive the dichroism spectra, from detectors 83, 88 which form part of separate optical systems monitoring the distance of movement of the mirror system 38 and thus accurately noting the phase retardation. One system, using broad band source 80 and polarizer 98, provides a beam passing through the interferometer offset in relation to the main beam 29, and is for identification of the zero phase position of the demodulation function. The second system using a laser source 86 provides with detector 88 a fringe counting system to measure deviations from the zero. Both systems are provided with polarizers e.g. the same dichroic element, at 75, 76. The interferometer mirror systems shown may be modified but there should be an even number in one and an odd number in the other, system. The polarization directions produced thereby may differ from that shown, but should always provide two orthogonal components for the recombined beam. The motion of the moveable mirror system may be continuous or stepwise. The system is particularly useful for measurements in the infrared region of the spectrum.
Patent GB-838376-A (GB)
Title: Improvements in speed games
IPC: A63F9/14
Filed: 1958-12-15
Abstract: 838,376. Race games. ZAGON, G. Dec. 15, 1958 [Sept. 16, 1957], No. 29034/57. Class 132(2) A model 1 is moved round a course marked on a playing surface 3 by a magnet 2 beneath the surface and mounted on an endless steel band 5 driven by pinion 8 the teeth of which engage spaced openings 6 in the band. Pinion 8 is rotated by a handle 7 and the object is to rotate it as fast as possible without the model tipping over at corners or being left behind by the magnet. The player competes against time or several concentric courses each with its band and magnet may be provided, one for each competing player.
Patent GB-1010743-A (GB)
Title: Uracil derivatives
IPC: C07D239/54
Filed: 1961-12-21
Abstract: The invention comprises uracil derivatives of the general formula <FORM:1010743/C2/1> wherein R1 has a molecular weight of 15 to 250 and is a substituted or unsubstituted alkyl, cycloalkyl, cycloalkyl alkyl, cycloalkenyl alkyl, alkenyl, cycloalkenyl, alkynyl, aralkyl or aryl radical in which any substituents are flourine, bromine or chlorine atoms or nitro, cyano, mercapto, hydroxy, alkyl or alkoxy radicals; R2 has a molecular weight of up to 250 and is a hydrogen or halogen atom, a nitro, thiocyano or alkylthio radical or a substituted or unsubstituted alkyl, alkoxy or alkenyl radical, in which any substituents are flourine, bromine or chlorine atoms or cyano, mercapto or hydroxy radicals; R3 has a molecular weight of up to 200 and is a hydrogen, chlorine or bromine atom or an alkyl, haloalkyl or alkoxy radical; or R2 and R3 together form a divalent alkylene bridge of formula (CH2)n, where n is 3, 4 or 5; R4 is a hydrogen atom or a C1 to C5 alkyl group; X is oxygen or sulphur; and A is boron trifluoride or an acid having an ionization constant in water at 25 DEG  C. greater than 2 x 10-5 and is a halogenated C2 to C5 aliphatic acid, a halogenated benzoic acid, a halogenated phenylacetic acid, a halogenated phenoxy acetic acid, an organic sulphonic acid, an organic phosphonic acid or an inorganic phosphoric acid. Preferred acids are those of the formula <FORM:1010743/C2/2> W is halogen; Y is halogen, alkyl or haloalkyl and Z is halogen or alkyl, and RSO3H, wherein R is an aliphatic or a substituted or unsubstituted aryl radical.  The compounds of the invention may be prepared by mixing, suitably at room temperature, a substituted uracil of the formula <FORM:1010743/C2/3> with an appropriate acid in an inert diluent, preferably a liquid aromatic or halogenated aromatic hydrocarbon which is liquid between 20 DEG  and 30 DEG  C. The addition compounds are precipitated from the reaction mixture or may be precipitated by the addition of excess non-solvent liquid paraffin or separated by vacuum evaporation at low temperatures, preferably below 50 DEG  C.  Said addition compounds have herbicidal activity.  Specifications 968,661, 968,662, 968,663, 968,664, 968,665 and 968,666 also are referred to.
Patent GB-1203571-A (GB)
Title: Valveless pump
Inventor: LISTER WILLIAM CLARKE
IPC: F04B43/08
Filed: 1966-06-28
Abstract: 1,203,571. 571. Flexible chamber pumps. NATIONAL RESEARCH DEVELOPMENT CORP. Sept.28, 1967 [June 28, 1966], No.29061/66. . Headings F1F and F1N. A fluid pump comprises a conduit and two elements operated to bring about periodic variations in the effective cross-section of the conduit at regions spaced apart along the conduit, the operation of the elements being phased to cause fluid to flow along the conduit in one direction the elements may be mechanically operated through gearing or by means of solenoids. It is stated that the conduit need not be completely closed and that the pump will be self priming and act as a vacuum pump.
Patent GB-1190374-A (GB)
Title: Interference Suppressors for Electrical Equipment
Inventor: MEADOWS CLEMENT ARTHUR
IPC: H03H1/00
Filed: 1966-06-29
Abstract: 1,190,374. Filter networks. NATIONAL RESEARCH DEVELOPMENT CORP. 21 June, 1967 [29 June, 1966], No. 29100/66. Heading H3U. An interference suppressor in the form of a low-pass filter network has a dissipative end section connected at one end of the network, the end section including an inductive series impedance having a conductance of the same order of magnitude as the reciprocal of the characteristic impedance of the network. As shown in Fig. 1 a T-section low-pass filter L, L, 2C has one of its inductances L shunted by a resistance R equal to the characteristic impedance #L/C. The resistance R is situated at that end of the filter remote from the noise source. In a ladder-type filter, Fig. 3, in which a noise source may be at either end each of the inductances L/2 is shunted by a resistance R where R = #L/C. A number of filters as in Fig. 1 may be connected in tandem (Fig. 2, not shown), the several filter sections having the same characteristic impedance but different cutoff frequencies to form a tapered filter. A structural embodiment of Fig. 1 is described with reference to Fig. 4 (not shown) in which two inductors, a resistor and a capacitor are mounted together to form a unitary structure. Instead of providing a separate resistor component one of the inductors possesses a substantial inherent shunt conductance.
Patent GB-722108-A (GB)
Title: Improvements in or relating to synchronous electronic circuits
Inventor: NOBLE SPENCER WATKINS
IPC: H03D1/22
Filed: 1951-12-12
Abstract: 722,108. Phase-sensitive circuits. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Dec. 11, 1952 [Dec. 12, 1951], No. 29142/51. Class 38 (4). [Also in Group XL (c)] A phase-sensitive rectifier or discriminator is fed by a constant-current source so that it presents a very high impedance to a D.C. amplifier of virtual earth type, e.g. due to a high-resistance negative feedback shunt between its output and input terminals. In the half-wave rectifier-discriminator of Fig. 4, diodes 25, 26 both conduct during alternate half cycles of a reference wave applied at 31 so that a signal input to be demodulated applied at the junction 32 of resistances 16, 17 connected across the diodes is blocked from passing through the consequently biased diodes 25, 26 to the output 11, 12. During the other reference half cycles the diodes 25, 26, however, are blocked and the input signal at 32 passes to the output 11, 12, through the diodes 13 or 14 in turn, for portions of the signal input half-cycle which are negative and positive respectively during this time. The difference in D.C. output of the diodes 13, 14 is proportional to the amplitude of the input signal, independent of the amplitude of the reference wave, and varies with the cosine of the difference in phase angle between the reference and signal waves. As shown, the input is fed from a pentode valve 33, i.e. of high impedance and constant-current characteristic, and its impedance is still further increased by applying H.T. to its anode through a series valve 39 and inductor 36 with a retroactive feedback to its grid through a capacitor 40 from the anode of the pentode valve 33, which counteracts changes of anode current through the pentode 33, i.e. further increases its impedance. In a full-wave modification the reference wave is applied also to a further circuit of diodes 13, 14, 25, 26 but of reversed polarity, and both diode circuit outputs applied to opposite ends of an output transformer secondary with the output circuit connected to a centre tap of the secondary. The input signal to be demodulated is then applied (from a pentode valve) to the primary of the output transformer. The rectifier-discriminator output may be amplified by a virtual earth, i.e. low input impedance D.C. amplifier (Fig. 5) having a negative feedback shunt of high resistance R between its output and input terminals and the value of R is made large so that the amplifier is of high sensitivity but yet has negligible voltage drift at its output, due to the drift being proportional to R but inversely proportional to the impedance of the phase-sensitive rectifier. Jour. Inst. Elec. Engrs., Vol. 93, Part IIIA, page 1279 et seq., is referred to. Specification 717,122 is referred to.