baber/WOPTO huggingface dataset:
Patent GB-798823-A (GB)
Title: Switching devices for stepping tubes
Inventor: CROWTHER GERALD OFFLEY
IPC: H03K17/52
Filed: 1956-12-11
Abstract: 798,823. Electronic counting apparatus. MULLARD, Ltd. Dec. 11, 1956, No. 37822/56. Class 106 (1). [Also in Group XL (c)] Successive pulses of a series of pulses from a source are applied alternately to two groups of switching electrodes of a multistable-state switching tube by means of two gates which supply alternate pulses to a first group of switching electrodes of the tube and the remaining pulses to a second group. The gates are controlled by voltages derived from the switching tube. Fig. 1 shows a multi-stable state counting tube of the magnetron beamswitching type in which, if for example the beam is in the " 0 " position incident on target electrode T0 then the application of a negative switching pulse to terminal OG and thus to grid G1 will transfer the beam to the " 1 " position incident on target T1. Pulses from a single source are applied to input terminal 30, Fig. 3, of two gating circuits comprising diodes 12, 13 and 22, 23 respectively which are controlled by pulses derived from terminal ET, Fig. 1, which is common to all the even target electrodes T0 ... T8 and by the pulse derived from terminal OT which is common to all the odd target electrodes T1 ... T9. Thus, if the switching tube is initially in the " 0 " position so that due to the current flow through common load resistor RTE the voltage at terminal ET will be low, for example 100 volts, and diode 13 will have no standing bias across it. When a negative pulse, for example of 25 volts amplitude is applied to terminal 30 this will pass through the gate comprising diodes 12, 13 and appear at output terminal OG and thus to grid G1, Fig. 1, which will switch the electron beam to the " 1 " position. The input pulse will also be applied to the gate comprising diodes 22, 23 but since diode 23 remains cut off no pulse is passed to terminal EG. When the beam has switched to the " 1 " position the diode 13 is biased to prevent the next pulse appearing at terminal OG whilst the voltage at terminal OT is at 100 volts, thus causing diode 23 to be ready to pass the next pulse to the terminal EG. Thus successive pulses appear at terminals OG and EG and the beam is switched sequentially along the tube. Such a gating circuit may be inserted between successive switching tubes in a counting circuit comprising two or more decade counters in cascade a negative pulse being taken from the " 0 " stage of each tube and applied through the gates to the grid of the next stage.
Patent GB-804200-A (GB)
Title: Microwave transmission systems
Inventor: MURPHY EDWARD JOSEPH
IPC: H01P1/06
Filed: 1954-12-31
Abstract: 804,200. Amplitude modulation systems. SPERRY RAND CORPORATION. Dec. 31, 1954, No. 37867/54. Class 40 (5). A waveguide system includes an internallymounted antenna which is rotated to modulate the microwave signals. As shown, the antenna 40 is rotated by motor 68 inside the circular waveguide 36. The input section, 12, is connected to 36 through the coaxial section 14 and " door - knob " transition 10. The output from 36 is provided at the rectangular waveguide section 46, 48, is modulated at the frequency of rotation of 40 and the energy peaks in the respective output signals are phased in time quadrature. Direct coupling between 46 and 48 is reduced by a septum 78.
Patent GB-1041608-A (GB)
Title: Light transmitting sheets
Inventor: COLLINS PETER HENRY
IPC: F21V13/02
Filed: 1963-09-26
Abstract: 1,041,608. Anti-dazzle devices. IMPERIAL CHEMICAL INDUSTRIES Ltd. July 27, 1964 [Sept. 26, 1963], No. 37959/63. Heading F4R. [Also in Division E1] A sheet of rigid transparent or translucent material suitable for use as an anti-dazzle screen in a light fitting has on one surface, a first set of grooves that are closely spaced and straight and parallel and a second set of grooves that 'are also closely spaced and straight and parallel and which intersect the first set at right-angles, the grooves penetrating into the thickness of the sheet and being treated or filled in such a manner that the surfaces of each groove are not light transmissible. The sheet material is preferably a synthetic thermoplastic such as polymethyl methacrylate, and the grooves are coated or filled with an opaque filler such as chalk dispersed in a suitable binding medium. One surface of the sheet may be embossed, e.g. with prisms, or otherwise modified to further control the light. The grooves may be cut and subsequently treated, or the sheet material may be moulded around a grid-like structure.
Patent GB-932729-A (GB)
Title: Improvements in methods of mounting diamonds
IPC: C04B37/02
Filed: 1959-11-10
Abstract: A brazing metal for fixing a diamond in a metal holder comprises Ti and Cu or Ag.  A base alloy comprising 72% Ag and 28% Cu may be melted under a pressure of 0.1 to 1.0 mm. of mercury and Ti added thereto in amount at least 1% but not more than 15% of the amount of base alloy.  The alloy is melted in a Mo and/or W crucible.
Patent GB-1169348-A (GB)
Title: High-Voltage Switch Drive
Inventor: LUKOVETS VIKTOR ANTONOVICH
IPC: H01H3/60
Filed: 1967-08-18
Abstract: 1,169,348. Automatic circuit-breakers. ROVENSKY ZAVOD VYSOKOVOLTNOI APPARATURY. 18 Aug., 1967, No. 38088/67. Heading H1N. In a high-voltage switch having a spring- driven shaft 3, Fig. 2, which is latched for stepwise movements through 180 degrees and actuates a switch shaft 16 through an eccentric 12 and connecting rod 15, the rod 15 is rigidly connected to a cage 14 surrounding the eccentric 12. The step-wise movements are controlled by a stop lever 25 urged by spring 27 and having an abutment engageable successively by rollers 23, 24 on a cam plate 22 resiliently mounted on the shaft 3 to absorb shocks. The cam plate 22 has a cammed edge engaging a roller 26 for resetting the stop lever 25 after each actuation. Movement of the stop lever 25 to release the shaft 3 is initiated by control rods 35, 36 actuating latches 32, 33 to release arm 30 coupled to the lever 25 through the rod 29. Latches 32, 33 are rendered successively inoperable by cams 39, 40 engaging rollers 32 and coupled to the switch shaft 16 through crank arm 43 and tierod 42. The spring drive for the shaft 3 may be wound up by hand or by an electric motor drive controlled by end-stop gear.
Patent GB-1270768-A (GB)
Title: Synthetic fibres
IPC: D06M15/263
Filed: 1970-08-07
Abstract: 1,270,768. Soil-resistant synthetic fibres. HERCULES Inc. 7 Aug., 1970 [13 Aug., 1969], No. 38132/70. Heading D1P. A method of improving soil resistance of polypropylene fibres comprises applying to the fibre a mixture of a poly(aminosiloxane) and a polyfunctional carboxylic acid and curing the mixture to effect partial crosslinking of the applied mixture. The polyaminosiloxane has the general formula  where x = 2 to 25, y= 0.5x to 3.0x, R and R' are alkylene radicals containing 1 to 3 C atoms and R" is a methyl or ethyl group. 1-10% by weight of the mixture as a crosslinked poler film is applied to the fibre. The poly(amino siloxane) and poly carboxylic acid are added as solutions in an inert volatile solvent, the polycarboxylic acid being added in concentrations such that the ratio of COOH to amine and alkoxy groups is at least 3 to 1, and the 100 to 120‹C to remove the solvent and effect a reaction between a reaction between the poly(aminosiloxane) and the poly carboxylic acid; curing is complete in 5 to 20 mins. The fibre may be polypropylene blended with cotton and examples of the acid in crosslinking are acrylic and citric arid malonic acids.
Patent GB-808014-A (GB)
Title: Tablet and method of making it
IPC: A61J3/10
Filed: 1956-12-17
Abstract: 808,014. Tablet; multi-layer tablet; tablet coating. HASSLE APOTEKARE P. NORDSTROMS FABRIKER A.B. Dec. 17, 1956 [Dec. 22, 1955], No. 38406/56. Class 81 (1). A method of preparing a tablet, suppository, vaginal suppository or bacilliform tablet, which may be in a multi-layer form, or a tablet coating on a core, comprises mixing a powdered soluble material which may be or may contain a medicament with a powdered insoluble non-toxic synthetic resin, preferably in a weight ratio of from 40 to 95 parts of the insoluble to 60 to 5 parts of the soluble, so that on compression the insoluble material forms a skeleton in the pores of which the soluble material is contained. Specified insoluble materials are a vinyl chloride-vinyl acetate copolymer, polyethylene, polymethyl methacrylate, polystyrene, polyvinyl acetate, cellulose acetate, urea-formaldehyde and melamine-formaldehyde resins, and preferably polyvinyl chloride. Soluble fillers specified are sodium acetate, sodium chloride, lactose and potassium sulphate. Medicaments specified are amobarbital, hexobarbital, sodium hexobarbitone, ephedrine hydrochloride, atropine, papaverine, stilboestral and nitroglycerin in alcohol. Tablets may be prepared which release medicament (a) at an even rate or (b) at a high initial rate followed by an even rate, these rates being independent of pH. Fig. 5 shows a multi-layer tablet of type (a) where the core 11 contains a mixture of ephedrine hydrochloride, sodium chloride and polyvinyl chloride, and 12 and 13 are retarding layers consisting of a mixture of sodium chloride and polyvinyl chloride. Fig. 6 shows a tablet of similar form except that the retarding layers 16 and 17 are of different thicknesses which enables a better approximation to a constant release rate to be achieved. The same results may be obtained if the retarding layers are of equal thickness but contain different amounts of soluble material or different soluble materials having different rates of solution. Fig. 10 shows a tablet of type (b) obtained by incorporating a medicament in the coating. The core 23 is the same as that in Fig. 5 with the sharp corners rounded off and the retarding layers 24 and 25 are also similar to those in Fig. 5, coated overall with a mixture of ephedrine hydrochloride, talcum, lactose and potato starch, so that on administration per os this coating 26 immediately disintegrates. In composite tablets the core may be a composition according to the invention, an ordinary tablet, or a loose powder which is compacted with the operation forming the coating. Multi-layer tablets may be made by compressing the pulverulent layers in one single compressing operation. Prolonged acting tablets may be made by first manufacturing a granulate in which the grains consist of an agglomerate of soluble and insoluble material. Moulded tablets may be heated to fuse or sinter the insoluble granules when using a thermoplastic or thermosetting material.
Patent GB-1072758-A (GB)
Title: Improvements in the processing of fermented beverages
IPC: C12C11/11
Filed: 1964-09-21
Abstract: <PICT:1072758/C6-C7/1> Fermented beverages are concentrated by stripping off the constituents which are more volatile than water in a tower 1, further stripping the beverage from the tower 1 in a second tower 2 of its water content, and then in a third tower 10 combining the dehydrated residual liquid from tower 2 with the volatile constituents removed in tower 1.  The beverage to be concentrated after warming passes through line 3 to tower 1 which contains baffles to promote downward cascade flow.  Air, or preferably nitrogen or carbon dioxide, passes upwards in counterflow to the liquid, absorbs the volatile constituents, and emerges through line 5.  In tower 2 dry air, nitroge, or carbon dioxide is in counterflow with the liquid residue from tower 1, and on leaving through line 8 heavy with water vapour may pass through a drier 13 and be recirculated. The dehydrated liquid drawn off through line 9 is cooled and in tower 10 passes downwards in counterflow to the warm volatile laden gas derived through line 5.  The concentrated liquid is drawn off through line 11, and the stripping gas taken off through line 12 may be warmed and recirculated to tower 1. Some of the gas in line 5 may be cooled and the condensed liquid collected before being fed to tower 10.  The condensed liquid is fractionally distilled, the water fraction rejected and the concentrated volatile substance added to the concentrated liquid.
Patent GB-1110959-A (GB)
Title: Semi-conductor rectifier arrangement
Inventor: STORSAND BJARNE
IPC: H01L25/03
Filed: 1965-09-09
Abstract: 1,110,959. Semiconductor rectifiers. MASCHINENFABRIK OERLIKON. 9 Sept., 1965 [21 Sept., 1964], No. 38509/65. Heading H1K. A rectifier arrangement comprises a plurality of finned coolers each having a cavity containing two semi-conductor diodes of different polarity. at least some of the cavities also containing condensers and resistances. The finned portions of the coolers project into a container charged with coolant and connected to a heat exchanger, and the diodes are located in a weatherproof closed chamber. Insulating material is disposed between the coolers and the wall of the container.
Patent GB-1029509-A (GB)
Title: Machine for post-forming resinous plastic sheet material
IPC: B29C53/04
Filed: 1964-09-22
Abstract: 1,029,509. Hydraulic shock absorbers. A. O. LEE. Sept. 22, 1964, No. 38631/64. Heading F2S. [Also in Division B5]  An hydraulic damper for use in a moulding machine, comprises a piston 113, which has fluid passages 116 therethrough and which is reciprocable within a cylinder 111, the spaces each side of the piston being joined by a passage 118 having an adjustable metering valve 119. The piston carries a spring valve plate 117, so that on movement of the piston to the left, as viewed, all transfer of liquid takes place through passage 118, and on movement to the right the liquid flows through passages 116, thus making such movement relatively easy. A fluid reservoir 120 containing a sprung piston 121 is provided, the rod 122 being graduated so that the amount of fluid in the damper may be ascertained.
Patent GB-339797-A (GB)
IPC: C09C1/02
Filed: 1929-12-18
Abstract: 339,797. Perdu, R. Dec. 18, 1928, [Convention date]. Colloidal sols.-In the purification by washing of earths, clay, china clay, quartz, silica, felspar, bauxite, alumina, baryta, calcium and strontium sulphates and carbonates and other minerals, the colloid matter being treated is peptized by a non- electrolytic organic substance such as an infusion of plants, straw, or bark, whereby losses occasioned on separation of coarse impurities are minimised.
Patent GB-338773-A (GB)
Title: An improved appliance for withdrawing pit-props and the like
IPC: E21D15/60
Filed: 1929-12-19
Abstract: 338,773. Skellingtons, Ltd., Wood, G., and Pitt, G. N. A. Dec. 19, 1929. Lever and linkage load-handling appliances.- A gripping device for withdrawing pit props consists of two jaws a, b which are hinged together at their ends c and carry links pivoted to their other ends, one link e being shorter than the other d and adapted to be secured (for example by a removable pin f) to the longer link which is attached to the hauling rope. In order to locate the device on the prop the jaws are provided with holes i to receive a pin passing through a hole in the prop.
Patent GB-1353723-A (GB)
Title: Chemiluminescence instrument
IPC: G01N21/76
Filed: 1972-08-21
Abstract: 1353723 Measuring chemiluminescence photoelectrically FORD MOTOR CO Ltd 21 Aug 1972 [15 Sept 1971] 38867/72 Heading G1A The chemiluminescence of a reaction is measured by chopping the radiation before applying it to a detector to provide an alternating signal. As shown, Fig. 1 a reaction chamber 18 having a transparent window 12 is provided with inlets 20 for the sample and reactant and an opening 22 in a baffle 16 leading to an exhaust port 24. A four bladed fan-like chopper 42 is rotated in front of the chamber by a motor 38 and the chopped radiation is detected by a silicon photo-diode 26 and the resulting A. C. signal amplified and synchronously detected using a reference generated by a sensor 48. The front of the photo-diode is provided with a transparent conductive coating 44 (e. g. of tin oxide) which is connected to the chopper blades 42 to prevent capacitative effects between the blades and the cell. Alternatively a similarly connected transparent conductive member may be mounted between the blades and the photo-cell. The sides of the blades facing the photo-cell are painted black.
Patent GB-894931-A (GB)
Title: Manual indexing arrangement for tool holding blocks for metal cutting machines
Inventor: HAKE WALTER THOMAS
IPC: B23Q16/10
Filed: 1958-12-02
Abstract: 894,931. Lathe &c. details. AMERICAN STEEL FOUNDRIES. Dec. 2, 1958, No. 38894/58. Class 83 (3). A four-sided tool-block 32, Fig. 1, is manually rotatable about a pin 20 secured to a base 14 which, in the particular example, is the side ram of a boring and turning mill. A ring 36, Figs. 1 and 5, with axially extending teeth 42, is secured to the base and a corresponding ring 46 with oppositely facing toothed recesses is secured to the underside of the tool-block so that when the teeth and recesses are in engagement the turret tool-block is locked in indexed position. The teeth and recesses are formed by grinding with a band-type grinding-wheel 104, Fig. 5, of cylindrical form. The faces of each tooth preferably converge towards the apex to facilitate engagement. A pin 30, Fig. 1, in the base gives the approximate location for each of the indexed positions required. A hand-lever 88 is used for clamping &c., and is rotatably secured to the upper end of pin 20 by a nut 96 and thrust bearing 92. The hand-lever is keyed to a sleeve 62 which has a cam-face 74, Fig. 3, opposite a corresponding cam-face 68 on a sleeve 56 which is keyed to the pin 20. The sleeve 62 is also provided with a cam-groove 76 into which engages a radial pin 78 carried by a sleeve 58, Fig. 1, secured to the upper face of the tool-block.
Patent GB-953403-A (GB)
Title: Improvements in steroid processes
Inventor: MACEY PETER EDWARD
IPC: C07J75/00
Filed: 1961-10-31
Abstract: Steroids are prepared by hydrogenating D 5,16-steroids in the presence of benzene or toluene whereby the double bond in the 16,17-position is selectively hydrogenated to form D 5-steroids. An additional solvent such as ethyl acetate may be present.  The process is particularly useful for converting D 5,16-pregnadiene-3b -ol-20-one and esters thereof into the corresponding D 5-pregnenes.
Patent GB-367100-A (GB)
Title: Improvements in lock nuts
IPC: F16B39/284
Filed: 1930-12-30
Abstract: 367,100. Lock nuts. EVENO, A. A., 1, Rue Alfred Laurant, Boulogne-sur-Seine, France. Dec. 30, 1930, No. 39143. Addition to 357,865. [Class 89 (i).] The lock nut according to the parent Specification is modified in that the milled teeth 5 are given a helical shape 14 and the slots are formed tangentially as at 3b. The teeth 5a, 51, 5g, 5h in any segment are set successively nearer to the axis.
Patent GB-926081-A (GB)
Title: Improvements and simplification in linear power amplifier operation
IPC: H03F1/54
Filed: 1961-11-03
Abstract: 926,081. Valve supply circuits. G. R. B. THORNLEY. Dec. 19, 1961 [Nov. 3, 1961], No. 39361/61. Class 40 (6). In a linear power amplifier using a pentode or tetrode having grid bias of constant or zero value, the sole screen supply is obtained by rectification of the input or output signals. As shown in Fig. 3, the audio input signal is rectified by a thermionic or semi-conductor diode R to provide a screen voltage, the value of which is dependent on the level of input signals. Fig. 5 shows a radio frequency power amplifier in which the screen supply is derived by rectifying, at R, the output. A low-pass filter is provided to isolate harmonics introduced by rectification. Fig. 2 (not shown) relates to a circuit similar to that shown in Fig. 5, but wherein the screen supply is derived by rectifying the input signal. Fig. 4 (not shown) relates to a push-pull audio-amplifier in which the screen voltage is obtained by rectifying the voltage across an auxiliary winding on the output transformer. A constant value of grid bias may be obtained by rectifying the heater supply voltage. Specification 742,684 is referred to.
Patent GB-886350-A (GB)
Title: Improvements relating to the production of wafers of semi-conductor material
Inventor: WEIR MARY TERESA
IPC: C23F1/40
Filed: 1958-12-08
Abstract: 886,350. Etching. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Dec. 2, 1959 [Dec. 8, 1958], No. 39524/58. Class 100(2) A process for producing wafers of monocrystalline germanium of a predetermined uniform thickness divided from a slice cut from an ingot comprises immersing the slice in an etching bath consisting of a mixture of sodium or potassium hydroxide and hydrogen peroxide, e.g. 8 gm. potassium hydroxide to 100 mils. of 10 vol. hydrogen peroxide. The slice is first washed in carbon tetrachloride and then in pure alcohol. The etching temperature is 70‹C. Etching takes place in perforated stainless steel containers rotated in the bath. A selected reduction in thickness is first obtained with a bath having a predetermined rate of etch, and the desired thickness is then reached in a second bath having a reduced rate of etching by virtue of having already been used for initial etching.
Patent GB-1001826-A (GB)
Title: Improvements in or relating to a tetrahydropyran derivative
IPC: C11B9/00
Filed: 1961-11-06
Abstract: The invention comprises trans- and cisforms of 2 - (2 - methyl - 1 - propen - 1 - yl) - 4 - methyl tetrahydropyran and mixtures thereof. They may be prepared by subjecting to an acid-catalyzed cyclizing reaction a 1-hydroxy-3,7-dimethyloctadiene or a compound derived therefrom by hydration of one of the double bonds. Suitable starting materials are 1-hydroxy-3,7-dimethyl-4,6 -octadiene and 1-hydroxy-3,7-dimethyl -5,7-octadiene and mixtures thereof. Suitable starting alcohols are obtained by reacting citromethyl acetate with bromosuccinimide to give monobromo derivatives, dehydrobrominating these to give a mixture of diene acetates and hydrolysing these to give the alcohols.  If desired, the individual isomers may be separated from the mixture by adsorption chromatography on alumina. Other suitable alcohols for use as starting materials are 1,6-dihydroxy - 3,7 - dimethyl - 7 - octene; 1,7 - dihydroxy - 3,7 - dimethyl - 5 - octene; 1,8 - dihydroxy - 3,7 - dimethyl - 6 - octene and 1,5 - dihydroxy - 3,7 - dimethyl - 6 - octene which are derived from the diene alcohols referred to above by hydration of one of the double bonds. 1,5-Dehydroxy-3,7-dimethyl-6-octene may be prepared by treating the methyl ester of bromocitronellic acid with potassium hydroxide and reducing the product with LiAlH4 or reducing the 8 - (2 - methyl - 1 - propen - 1 - yl) - 8 - lactone by means of LiAlH4.ALSO:2-(2-Methyl-1-propen-1-yl)-4-methyl tetrahydro-pynaw is used as a constituent of perfume compositions.  It may be used either as a mixture of its stereoisomers or the individual-isomers may be used separately.  The compounds may be added to synthetic floral essences in an amount up to 5% by weight.  In particular they may be added to perfume compositions containing citronellol.  Several detailed examples are given of perfume compositions containing the tetrahydropyran derivatives.