baber/WOPTO huggingface dataset:
Patent GB-967641-A (GB)
Title: Improvements in optical resonant cavities
IPC: G02F1/225
Filed: 1961-10-27
Abstract: 967,641. Spectral analysis. AMERICAN OPTICAL CO. Oct. 27. 1961 [Nov. 2, 1960], No. 38625/61. Heading G1A. [Also in Divisions G2 and H3] An optical resonant cavity comprises a thin elongated transparent element surrounded by a medium of lower refractive index and having partially reflecting coatings at each end. Its optical path length is substantially equal to the product of an integral number of half-wavelengths of the wavelength it is desired to resonate and the refraction index of the transparent element but tuning to other frequencies is possible by varying the optical path length. This may be done electrically using the Kerr effect, or by altering the pressure applied to the ends of the cavity or by changing the temperature of the cavity. The diameter of the element and the refractive index difference between the element and its surrounding medium put an upper limit on the frequencies which the cavity will transmit in a single mode and must be properly chosen as explained in the Specification. The wavelength spacing of the light that the cavity will resonate (i.e. the line spacing) increases in inverse proportion to the cavity length, while the line width varies with the wavelength, the reflection co-efficient of the end coatings and inversely with the cavity length and effective refractive index. The resonant cavity may comprise a glass fibre with a thick coating of lower refractive index, the ends of the fibre being coated with evaporated partially reflecting films of aluminium or silver. Electrically tuned cavities may be provided by embedding electrodes 18, 20 in the cladding 14, as shown in Fig. 3, or by evaporating metallic fibres on the outer surface of the cladding and connecting the electrodes or the films to a variable voltage source; in this way the optical path length is varied by the Kerr effect. The resonant cavity of Fig. 3 may be used for spectral analysis, using the equipment shown in Fig. 5. A sweep generator 40 applies a saw tooth wave form to an oscilloscope 38 and also to the electrodes 18, 20 of the cavity so as to cause the cavity to resonate at different frequencies within a desired spectrum. The light output of the cavity is focused on a photo-cell 34, the output signal of which is a measure of the light intensity at each frequency and is applied as a video signal to the oscilloscope 38. If desired, the incident light from source 28 may be chopped and amplifier 36 tuned to the chopping frequency. Instead of using a glass fibre as the element 12 other materials, solids, liquids or mixtures thereof, may be employed. For instance, element 12 may be formed by high index oil in a hollow tube, or by flint glass particles embedded in methyl methacrylate. The outer cladding need not be glass; it can be an inert gas in which the element 12 is supported.
Patent GB-1275088-A (GB)
Title: Preferential etching composition and method
Inventor: STRIEDIECK WALTER J
IPC: C23F1/22
Filed: 1969-08-01
Abstract: 1275088 Etching CHEMCUT CORP 1 Aug 1969 [2 Aug 1968] 38629/69 Heading B6J A composition suitable for the powderless etching of ferrous and magnesium base metals with an etch factor of not less than 4, comprises an etchant consisting of one or more acids and/or salts of a weak base and a strong acid which afford hydrogen ions in aqueous solution, and a lateral etch minimizing agent consisting of one or more compounds which afford cupric and also arsenate and/or phosphate ions in acidic solution. Examples of the etchant are nitric acid, hydrochloric acid, hydrofluoric acid, sulphuric acid, perchloric acid, ferric chloride, ferric nitrate, aluminium nitrate and zinc nitrate. Examples of the minimizing agent are cupric nitrate, oxide, carbonate, sulphate, hydroxide, chloride and acetate, phosphoric acid, phosphorous trioxide and pentoxide, acid sodium phosphate and arsenate, zinc, lithium and manganeze phosphate, mono-, di- and tri-sodium and ammonium phosphate andarsenate, sodium hexametaphosphate, tetrasodium pyrophosphate, basic copper arsenate, assenic oxide, and arsenious oxide. A further additive referred to is zinc oxide. A buffer salt such as ammonium citrate, ammonium acetate or sodium tartrate may also be added.
Patent GB-1256152-A (GB)
Title: Process for producing oxalic acid
IPC: C07C51/00
Filed: 1969-08-01
Abstract: 1,256,152. Oxalic acid. MITSUBISHI EDOGAWA KAGAKU K.K. 1 Aug., 1969 [7 Aug., 1968], No. 38751/69. Heading C2C. Oxalic acid is prepared by oxidizing ethylene glycol in the absence of a catalyst with an acid mixture of 2-60% by weight of nitric acid, 20-78% sulphuric acid, and 20-50% water, the molar ratio of nitric acid/ethylene glycol being at least 3/1.
Patent GB-1113054-A (GB)
Title: A method of and apparatus for the manufacture of glass fibre or plastic tubes
IPC: B29C53/60
Filed: 1964-09-23
Abstract: 1,113,054. Making tubes. P. U. POULSEN. 20 Sept., 1965 [23 Sept., 1964], No. 38760/64. Heading F2P. Glass fibres, paper or a plastics material treated with an unhardened resin are wound on to a mandrel comprising a plurality of parts 9 arranged for individual, longitudinally reciprocating movement and which are projected sequentially in one direction and sequentially retracted in the opposite direction, the formed tube being heated to effect hardening of the resin. The parts 9 are reciprocated by axially movable bars 6 provided with rollers 7 engaged in a cam track 3 in a cylinder 2 rotated by a motor 5.
Patent GB-867034-A (GB)
Title: Improvements applicable to the production of embedded electrical components
IPC: H01B3/42
Filed: 1956-12-20
Abstract: A viscous fluid substance capable of forming a deformable or yieldable but non-fluid coating is spread over the outer surface of the component, e.g. a transformer, around which is then moulded a mass of synthetic resin.  If desired, the coating material may be of a thixotropic character and may comprise a polyester resin and a substance giving thixotropic properties such as finely divided silica.  The resins employed are preferably unsaturated alkyd resins dissolved in an unsaturated monomer such as styrene to form a polyester resin of suitable viscosity.  The outer moulded mass of synthetic resin may be an epoxy or polyester resin.
Patent GB-1445133-A (GB)
Title: Method and apparatus for electrical machining sysem
IPC: B23H5/02
Filed: 1973-08-16
Abstract: 1445133 Electrolytic machining CAREL FOUCHE LANGUEPIN 16 Aug 1973 38818/73 Heading C7B [Also in Division B3] An impression is formed in a workpiece 12 by an electrode 10 which is separated from the workpiece 12 by a weak electrolyte and which is fed with separate, negative pulses having a frequency of 20-200Hz and a voltage peak value of not greater than 60V. The electrolyte e.g. soap water, emulsified mineral oil, is supplied through a rectangular slot 11 in the copper electrode 10 from a supply tank 16 by means of a pump 13. The pulses are supplied by an A.C. supply via a variable transformer 19 and a half wave rectifier 18. During the intervals of time (b) Fig 4, (not shown) between the application of the pulses to the machining gap by the diode 18, the voltage in the gap decreases exponentially. The transformer 19 may be bridged by a variable capacitor (26) Fig. 3, (not shown). The electrode 10 is connected to a vibrator 8 which is operated at a frequency at least as high as that of the supply pulses e.g. 100Hz when the pulse frequency is 50Hz. The width of the machining gap is controlled by a servo-control 23 operative at a voltage of 4-20 volts.
Patent GB-1273419-A (GB)
Title: Process for producing ceramic materials
Inventor: MONFORTE FRANK ROCCO
IPC: H01F1/03
Filed: 1969-08-05
Abstract: 1,273,419. Magnetic materials. WESTERN ELECTRIC CO. Inc. 5 Aug., 1968 [5 Aug., 1968], No. 39054/69. Heading H1H. [Also in Division C1] Ferrites are obtained by calcining a mixture of oxides or thin precursors with MgSO 4  and then firing at at least 1125‹ C. at least 0À25% expressed or S being present at the beginning of the firing. Specified ferrites contain the oxides of Fe, Ni, Zn, Co and Mn Œ the oxides of Mg, Cd, Cu, Ca, Cr, Pt, Pd and Th oxides are included if domain wall motion needs to be impeded.
Patent GB-919228-A (GB)
Title: Improvements in fluorescent lighting fittings
Inventor: COOK SIDNEY ARTHUR
IPC: F21V23/02
Filed: 1960-11-16
Abstract: 919,228. Electric lighting fittings. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Nov. 16, 1961 [Nov. 16, 1960], No. 39364/60. Class 75 (4). A fluorescent lighting fitting for batten fixing includes a housing for the control gear components consisting of a sheet-metal channelsection stamping having a top surface 6 and depending side walls 7 within which the components are releasably mounted, and a removable bottom plate 17 secured to the main housing so that it can be removed without removal of the lamp-holders. The ends of the main housing are closed by box-like end-pieces 2 secured in place by a flange 20 engaging a corresponding flange 19 on the surface 6 and a screw 4 passing through the surface 6 and securing a tongue 23 on the end-piece. The base 21 of the end-piece has a screw-hole for securing the lamp-holder and a stepped portion 21a to which the end of the plate 17 is secured by a screw passing through a slot 77a in the plate 17. The ballast choke 12 is supported at one end by a tongue 10 on the top plate 6 and at the other end by a clamping bracket 3 having a depending wall 27 which assists in dissipating the heat energy in the choke.
Patent GB-1357110-A (GB)
Title: Heating devices
IPC: B23K3/03
Filed: 1971-08-24
Abstract: 1357110 Soldering ELTRA KG LEICHT & TRAMBAUER 24 Aug 1971 [25 Aug 1970] 39557/71 Heading B3R [Also in Division H5] The L-shaped bit 7 of a soldering iron has a tapered shank 71 which is a force fit within the heating element 1, 2, 3, 4. A blind bore 72 is dimensioned according to the output required of the soldering iron.
Patent GB-349903-A (GB)
Title: Improvements in and relating to impregnating and coating compositions
IPC: D06M15/51
Filed: 1929-12-27
Abstract: Coating or impregnating compositions consist of aqueous emulsions of resins of the polyhydricalcohol-polybasic acid type, and of rubber or rubber-like substances such as balata, guttapercha or synthetic rubbers.  The emulsions may be prepared with the aid of emulsifying agents such as the product described in Specification 8245/07, [Class 2, Acids and salts, Organic &c.]. Colloidal clay such as bentonite may be added.  The emulsion of resin may be formed by dissolving the resin in an organic solvent such as solvent naphtha, butyl alcohol, &c. and mixing the solution in water.  A suitable resin is obtained by heating together phthalic anhydride, glycerol and castor oil at 190-200 DEG  C. while passing on inert gas such as nitrogen or carbon dioxide. The resin may be mixed with a urea-formaldehyde condensation product of the same resin formed by heating part of the resin with glycol monoethy ether and dimethylol urea.  Specification 349,988 also is referred to.
Patent GB-1187232-A (GB)
Title: Low-Fat Table Spread and process for preparing the same
Inventor: JOSEFOWICZ EDMUND LEO
IPC: A23D7/015
Filed: 1967-08-30
Abstract: 1,187,232. Low fat table spread. CORN PRODUCTS CO. 30 Aug., 1967, No. 39764/67. Heading C5C. A low-fat table spread comprises 55-65% of an aqueous phase dispersed in 45-35% of a fat, the aqueous phase being substantially free of protein and the fat phase providing the solid fat to make the spread a solid at about 70‹ F. If the spread is in print form the fat phase has the following solid content index values: 15-25 at 50‹ F.; 8À5-15À5 at 70‹ F., 5-10À5 at 80‹ F. and 0-3À5 at 92‹ F. If the spread is packed in a tub the corresponding S.C.I. values for the fat phase are 8-15; 5-8À5; 2À5-5; and 0-1À5. In the examples the base oils are corn, safflower, soybean, cottonseed oils and partially hydrogenated forms of these oils. Additives which may be present are salt, EDTA and potassium sorbate in the aq. phase and Vitamins A and D isopropyl citrate, mono- and di-glycerides and lecithin in the oil phase.
Patent GB-1352255-A (GB)
Title: Substituted uracils
IPC: G01N21/85
Filed: 1971-08-25
Abstract: 1352255 Substituted uracils BADISCHE ANILIN- & SODA-FABRIK AG 25 Aug 1971 [25 Aug 1970] 39781/71 Heading C2C Novel compounds of formula where R<SP>1</SP> is linear or branched alkyl with 3-6 carbon atoms or cycloalkyl with 5 or 6 carbon atoms, R<SP>2</SP> is Br or Cl and R<SP>3</SP> is alkyl with 1-3 carbon atoms, or R<SP>2</SP> and R<SP>3</SP> together form a chain of (CH 2 ) n  where n is 3-5, and R<SP>4</SP> is unsubstituted crotonyl, or branched chain saturated acyl with not more than 8 carbon atoms optionally substituted by 1-3 halogen atoms (Br or Cl) and/or by acyloxy with 2-8 carbon atoms which in turn may be substituted by 1-3 Cl atoms, may be prepared by reacting the R<SP>1</SP>R<SP>2</SP>R<SP>3</SP> substituted uracil with the R<SP>4</SP> chloride. The compounds are herbicides.
Patent GB-870642-A (GB)
Title: Improvements in portable electric lamps
Inventor: YU LEUN WAI
IPC: F21L4/00
Filed: 1959-11-24
Abstract: 870,642. Electric battery lamps. SUNBEAM MANUFACTURING CO. Ltd. Nov. 24, 1959, No. 39793/59. Class 39(2). A portable battery lamp comprises a casing containing an electric battery, a reflector casing and bracket means connecting the reflector casing to the battery casing or to a structure connected thereto, e.g. the handle on the battery casing, the reflector casing being mounted on the bracket means so as to be capable of partial rotation and the bracket means being mounted on the battery casing or the structure by means permitting partial rotation thereof with respect to the casing or structure, the axes of rotation of the reflector casing and bracket means being at right angles to one another. In one form, the battery casing 1 is provided with a domed top 4 of glass or synthetic resin which may be coloured, a bulb being mounted beneath the dome, and a handle 5 carried in cups 7 on opposite sides of the casing and having undulating edges providing a series of notches 9 whereby the handle may be held in a number of positions. The casing 1 carries a base plate 22 supporting the base of a bracket 17 between the arms of which is pivotally mounted a reflector casing 10 in which is a second electric bulb. The casing 10 has an aperture 15 for the passage of a wire connecting the bulb to the battery. The base plate 22 has an arcuate groove engaging a projection on the base of the bracket to limit the rotation of the latter to less than 360 degrees. In a modification (Fig. 8, not shown) the reflector casing is similarly mounted on the handle of a block shaped battery casing, a pivoted arm bearing a second lamp being mounted on the handle adjacent the base plate for the bracket carrying the reflector casing.
Patent GB-914081-A (GB)
Title: Improvements in or relating to suspension filing cabinets
Inventor: PARVIS PIETRO
IPC: B42F15/06
Filed: 1960-11-18
Abstract: 914,081. Cabinets. FERRETTI, A., PARVIS, T. F., and BEVILACQUA, F. F., [trading as DITTA A. FERRETTI]. Nov. 18, 1960, No. 39839/60. Class 52 (1). [Also in Group XV] In a suspension filing cabinet for drawings or the like (see Group XV), doors 8 9 at the front of the cabinet a hinged lid 6, and telescopic suspension rails 16, 17 are interconnected by linkages 21, 22a, 26, 29 and 31, so that on raising the lid, the doors 8, 9 are opened outwardly and the suspension rails extended. The lower door 9 has a shoot 12 attached to its rear surface, which co-operates with a fixed plate 34 in the open position of the door. Alternatively, the cabinet is provided with a shutter at the front which rolls up into a compartment in the base of the cabinet, Fig. 10 (not shown), and the shoot 12 and suspension rails 16, 17 projected forwardly through the open front of the cabinet on raising the lid 6.
Patent GB-1338125-A (GB)
Title: Resin crusher
IPC: B65B69/00
Filed: 1971-08-25
Abstract: 1338125 Emptying containers L A DREYFUS CO 25 Aug 1971 [21 Jan 1971] 39971/71 Heading B8C Containers filled with a friable material are emptied by opening one end of each container, inverting the container and subjecting it to compressing force across a constantly changing diametral plane. As shown, containers 38 filled with resin are fed by a conveyer arrangement 42, 44, 46, 48 to an offset roller section 50 where they are pushed by an operator over an edge 62 on to a shoot 52 which directs them to a bar 66 where they are tipped to an inverted position at the entry position 70 of a planetary crusher 26. The crusher 26 comprises upper and lower support spiders 86, 88 ; 90, 92 for a driven hollow drum 102 and a surrounding fixed drum 106, the space between opposing faces of the drums 102, 106 being slightly less than the diameter of the containers 38. The opposing faces are preferably roughened. Rotation of the drum 102 distorts the containers by compression and cracks the contents which fall by gravity through the bottom spider 90, 92 to a container 78 and carries the empty containers to a discharge station (152) Fig. 4 (not shown) from which they are removed manually. In a modification Fig. 6 (not shown) a removable liner (156) for the outer drum is provided to accommodate containers of a different diameter.
Patent GB-980764-A (GB)
Title: Treatment of aluminous cement
Inventor: WILSON ARTHUR
IPC: C04B7/32
Filed: 1962-10-25
Abstract: High alumina cement is obtained by grinding a non-glassy high alumina phosphorus furnace slag containing combined aluminium and calcium (calculated as the weight ratio of alumina to lime) of 0.50 to 1.85:1 and combined silicon (calculated as silica) not exceeding 10% by weight, and treating with carbon dioxide to increase the setting time to at least 1.5 hours.  The slag may be ground in an atmosphere of carbon dioxide or tumbled or fluidized with carbon dioxide after grinding. Carbon dioxide contact times of 0.5-1.5 hours are specified.  The treatment may be carried out in the presence of water, e.g. moist carbon dioxide may be employed.  The cement may be stored for 6-12 hours in an atmosphere of carbon dioxide after the above treatment. Specifications 747,016, 889,263 and 919,322 are referred to.
Patent GB-1366013-A (GB)
Title: Error checking and correcting system
IPC: G06F11/10
Filed: 1972-08-31
Abstract: 1366013 Digital data error detection and correction INTERNATIONAL BUSINESS MACHINES CORP 31 Aug 1972 [14 Dec 1971] 40393/72 Heading G4A In a digital data processing system, circuitry corrects single errors, corrects related double errors and detects unrelated double errors. A data word comprises 64 data bits arranged in two sub words, bits 0-31 and 32-63 and thirteen check bits. The equivalent bits of the two sub words are related in 32 pairs, i.e. bits 0 and 32 come from the same storage location BOM-0, &c. and thus if there is an error in that location both of the bits are likely to be erroneous. Double unrelated errors are also possible and the memory 100 may be integrated circuits, magnetic cores, or a capacitor or diode matrix. A word with its check bits is read out via register 103 and passed to syndrome generator 109 comprising exclusive OR circuits which perform modulo 2 addition. Here the check bits are recalculated and compared with the appended check bits to produce syndrome bits S1. Different error types produce different syndrome patterns and these are detected in decoder 112 which generates a data correction bit indication for each correctable error bit. Circuitry also generates a NO error, correctable error, or non- correctable error indication. Data correction circuitry 114 then corrects the original data and the check bits are recalculated (unit 128, Fig. 2, not shown), before the whole word is returned to the memory 100. The check bits. The thirteen appended check bits comprise a 6-bit single error detecting Calvert code, a 6-bit minimum-3-weight code which detects and corrects related errors and corrects the detected single errors and a single parity bit ST which detects unrelated errors. The whole word can be expressed as a matrix (Fig. 3, not shown). The 6-bit Calvert code is essentially a Hamming code with a different layout of check and data bits. The code is provided over one sub word and replicated over the other sub word. Replication is defined to mean that for any data bit position in the word there is one and only one other data bit position having the same data syndrome column vector (DSCV). The 6-bit minimum 3 weight column code is provided over the first half word, and is then spread over the entire word. The term spreading is defined for each matrix element by this equation: where  d (j) i  is an element of the minimum-3- weight code for the first half word (l/2) i  and d(j+l/2) i  are related elements. This latter code enables the errors detected by the first code to be corrected.
Patent GB-875969-A (GB)
Title: Improvements relating to motor vehicle suspensions comprising hydro-pneumatic springelements
IPC: B60G17/033
Filed: 1959-11-27
Abstract: 875,969. Adjusting body height; preventing lateral roll. DAIMLER-BENZ A.G. Nov. 27, 1959 [Dec. 6, 1958], No. 40408/59. Class 108(2). A hydro-pneumatic suspension system for vehicles comprises hydro-pneumatic spring units 3, 6 associated with each wheel of the vehicle and each having a height control valve. The system also includes a pump 17 drawing oil from a reservoir 19 and delivering oil via a regulating device 12 and one way valves 14, 16, to pressure accumulators 8, 10 associated with the front and rear axle suspension units respectively, and a pressure maintenance valve 23.
Patent GB-1346124-A (GB)
Title: Tobacco and tobacco substitute compositions and process for amking same
IPC: D21H27/00
Filed: 1972-08-31
Abstract: 1346124 Reconstituted tobacco or tobacco substitute compositions A M F Inc 31 Aug 1972 [22 Oct 1971] 40430/72 Heading A2C The compositions comprise tobacco or tobacco substitute and at least one film forming, polar-solvent-soluble ether, ester or mixed ether-ester substituted galactomanan gum. Tobacco substitutes mentioned are corn silk, peat, and partially oxidised celluloses and substituted celluloses. The compositions may be formed into sheets for use, after shredding where necessary, as cigar wrappers or fillers, or cigarette fillers. In the examples, finely divided tobacco was mixed with hydroxyethyl Locust Bean gum, hydroxyethyl Guar gum or hydroxypropyl Guar gum, and water (as polar solvent), cast into a film on a stainless steel belt and dried by heating the belt to about 195F by steam impingement on its underside to produce a cigar wrapper sheet. Other suitable polar solvents and substituted gums are also specified.
Patent GB-1096964-A (GB)
Title: Water-soluble polymers and process for preparing same
IPC: C08G65/26
Filed: 1966-09-12
Abstract: Polymers are prepared by reacting (a) 50% to 80% by weight of a polyamine of formula NH2[(CH2)mNH]nH, where m is from 2 to 4 an n is from 4 to 7, with (b) 10% to 30% by weight of a non-gem alkylene dihalide of formula X(CH2)pX, where X is chlorine or bromine and p is from 2 to 4, and then reacting the product with (c) 10% to 20% by weight of an a ,b -epoxyhalide of formula <FORM:1096964/C3/1> In Examples polymers are prepared by reacting ethylene dichloride with a mixture containing tetraethylene pentamine, tetraethylenehexamine, cyclized polyalkylene polyamines, hexaethyleneheptamine and heptaethyleneoctamine, and with pentaethylenehexamine, and the products are reacted with epichlorhydrin.