baber/WOPTO huggingface dataset:
Patent GB-721152-A (GB)
Title: Improvements in or relating to polymeric epoxyalkoxylaryl resin compositions
IPC: C08G59/08
Filed: 1951-05-15
Abstract: An epoxyalkoxyaryl resin as claimed in Specifications 721,149 and 721,151, is reacted with a drying or semi-drying oil fatty acid or a polyhydric alcohol ester thereof.  Suitable fatty acids are those from linseed, dehydrated castor, tung, perilla, soybean, oiticica, fish, hempseed, popyseed or sunflower oil.  They may be employed as the oils themselves, as polyhydric alcohol-modified oils, as mono- or di-glycerides or as partial or full esters with polyhydric alcohols such as pentaerythritol or partial esters of polyhydric alcohol with maleic, phthalic, succinic, adipic or fumaric acid.  Minor amounts of non-drying oil acids, resin acids or polycarboxylic acids may be incorporated.  Mixed acids may be employed.  The amount of acid need not be fully equivalent to the resin.  Reaction may be performed in a closed vessel, water being removed by azeotropic distillation or by bubbling an inert gas. Reaction is continued to a desired acid number and products dissolved to yield coating compositions which may include driers, e.g. lead or cobalt naphthenate or 2-ethyl hexoate. Baked, e.g. at 300 DEG  F. the coatings have good resistance to abrasion, water, chemicals.  The compositions may be modified by addition of ureaformaldehyde condensates, melamine resins, aniline- or ethylene diamine-formaldehyde resins.  Amine curing agents may be added, e.g. diethyl amine, dibutyl amine, diethylene triamine, piperidine, piperidine benzoate, trimethyl amine, triethyl amine, triethanolamine, methyl di-n-propyl amine, guanidine or guanidine derivatives.  Suitable solvents are acetone, methyl ethyl ketone, methyl, ethyl or n-butyl acetate, propylene oxide, dioxane, chloroform, ethylene dichloride, dichloroethyl ether, "Cellosolve" (Registered Trade Mark) acetate, butyl Cellosolve and 50-50 mixtures of toluene and ethanol.  Mixed epoxyalkyoxaryl resins of differing molecular weights may be employed to give suitable viscosities and the resins may be dissolved in solvents such as phenyl glycidyl ether, iso-propylphenyl glycidyl ether, o- and p-monobutyl-m-cresyl glycidyl ethers, glycidyl acetate or mono- and diglycidyl phthalates. In the examples, I the reaction product of a p-cresol-formaldehyde condensate and epichlorohydrin is heated with linseed oil fatty acids in an atmosphere of inert gas to 480 DEG  F.  The product when of desired viscosity is thinned with a 50-50 tolueneethanol mixture and cobalt and lead naphthenates added.  II is similar, using dehydrated castor oil acids and xylene as a solvent.  Specifications 721,153 and 721,154 also are referred to.
Patent GB-503281-A (GB)
Title: Method of rolling the races of ball bearings
IPC: B21H1/12
Filed: 1938-04-13
Abstract: 503,281. Making bearing - races. ROULEMENTS A BILLES MINIATURES SOC. ANON. April 13, 1938, No. 11377. Convention date, Sept. 4, 1937. [Classes 83 (ii) and 83 (iv)] Rolling.-The races of ball and roller bearings are machined and finished as required by balls or rollers, like those of the complete bearing, which are rolled and pressed into the races with the cooperation of a pair of abutment surfaces shown inclined to each other on the rings 3 and 4. In the Figure, a race cone 1 is mounted and rotated by a shaft 2 which is pressed axially to force the cone against balls 6 held in guide rings 3, 4 whereby an annular race groove 7 is formed and polished thereon. A stop against which the shaft 2 will abut, determines the depth of the groove to be rolled in. In other forms the race may be stationary. Ejector pins may be provided to force the race out of its holder.
Patent GB-557946-A (GB)
Title: A new or improved method of and means for forming and dressing grinding wheels
IPC: B24B53/07
Filed: 1942-08-14
Abstract: 557,946. Trueing grinding - wheels. COVENTRY GAUGE & TOOL CO., Ltd., and JELLIS, M. Aug. 14, 1942, No. 11377. [Class 60] A grinding-wheel is trued by a freely mounted crushing-roller which is traversed by a cam operated from the wheel, being lifted out of engagement therewith at the end of the traverse and returned by a spring. The ribbed crushing-roller 2 is carried by a member 16 which can be adjusted around a vertical axis by a worm 27 and is mounted in a head 3. The head 3 is traversed by means of a cam 7 driven through gearing 13 from the shaft 12 of the grinding wheel 4 and is returned by a spring 8. The roller is lifted during retraction by means of cam surfaces on a rod 20 fitted with adjustable stops 23.
Patent GB-113776-A (GB)
IPC: F16C3/20
Abstract: 113,776. White, A. E., (Park Drop Forge Co.). Jan. 8, 1918. Crank-shafts - Counterweights for crank-shafts are formed with two leg branches embracing the crank-shaft 10 and have lugs 25 which extend towards each other and to lugs 12, to which they are electrically welded. The weights are perferably made in two parts 21, 22 with lugs 26 electrically welded together, and the planes of all the lugs may be parallel to the direction of the centrifugal force.
Patent GB-715409-A (GB)
Title: Improvements in or relating to electronic high frequency signal translating devices employing wave transmission circuits
IPC: H01J25/38
Filed: 1952-05-06
Abstract: 715,409. Travelling-wave tubes. WESTERN ELECTRIC CO., Inc. May 6, 1952 [May 10, 1951], No. 11411/52. Class 39(1) [Also in Group XL(c)] A barrier electrode is inserted between two sections of a helix, or between two separate helices, in a travelling wave tube to intercept most or all of the electrons when the input signal is below a predetermined level; when the signal level rises sufficiently the transverse field component of the wave deflects the beam so that some electrons can pass the barrier electrode and give up energy to the output helix section or helix. In one form, Fig. 1, the gun has indirectly heated cathode 3, focusing electrode 8 connected to the cathode and supported by discs 11 from glass envelope 1, and accelerating electrode 9 connected to helix 13 via input coupling probe 17 and thence via output coupling probe 20 and lead 27 to battery 29. The helix is supported from the envelope by two or more ceramic rods 14 and the input and output coupling to waveguides 23, 25 is via probes 17, 20 and by pass capacities 9, 22; 21, 24. Loss material 12 disposed on rods 14 prevents wave energy from passing from the left to the right helix portion and serves as matching terminations for the helix portions. The electrons are focused by coil 18 or 19 on to barrier 15 connected to the helix by wire 16; the barrier 15 is disposed in the region of loss material 12 or slightly to the left of it. Thus the noise between input signal pulses may be eliminated and the noise distorted pulses reshaped to some degree when the device is used as a receiver or repeater in microwave pulse communication systems. In a modification, Fig. 3 (not shown), the beam is annular and passes outside two sections of helix separated by and connected to the barrier, the helix supporting rods being inside the helix and having loss material as in Fig. 1. The envelope is of metal and is slightly negative to the helix sections; the input and output guides are integral with the envelope. The input and output coupling devices each comprise a cylindrical electrode carrying a coupling probe connected to the helix, and co-operating with an outer annular electrode to form a by-pass capacity. The electrode leads are sealed through the envelope by glass beads. The beam is focused on to the barrier by magnetic and/or electro-static means, the latter taking place in the gun and comprising axial and perhaps radial fields.
Patent GB-474038-A (GB)
Title: Improvements in or relating to refractory materials
IPC: C04B35/16
Filed: 1936-04-21
Abstract: Refractory articles are made by firing a mixture of coarse granules (not less than ,3 mm. in diameter) of material rich in magnesium orthosilicate and fine material (not more than ,2 mm. in diameter) consisting of at least 75 per cent of another refractory or mixtures of refractories; the fine material should preferably be free from magnesium orthosilicate or from substances which form magnesium orthosilicate on firing.  The proportion of coarse granular material may be 10-80 per cent; when using the larger proportions of coarsely granular material a porous product is obtained and it is preferable to use low moulding pressures.  The coarse granules, which are preferably angular and graded and have diameters of 1-10 mm. may consist of synthetic magnesium orthosilicate or minerals such as olivine; the raw materials, especially those containing considerable proportions of magnesium hydrosilicate such as serpentine, are preferably precalcined.  Subordinate amounts of other coarse granular material, e.g. chromite or sintered or dead burnt magnesite may be incorporated in the mix.  The fine material is preferably one which possesses good resistance against chemical attack and may be magnesium oxide preferably the crystalline varieties, sintered or dead burnt magnesite, caustic magnesite, chromite, chromium sesquioxide, zirconium oxide, zirconium silicate e.g. zircon, talc, soapstone, steatite, asbestos or natural or synthetic chromium spinel; certain mixtures of these fine materials are specified for special purposes.  Alternatively, there may be used mixtures of substances which form by mutual reaction on firing the fine materials specified above, e.g. mixtures of chromium sesquioxide and magnesium oxide which on heating form chromium spinel.  Small proportions of other materials may be incorporated in the mix, e.g. ceramic binders such as binding clay, bentonite, caustic magnesia, lime, borates; moistening liquids such as water, aqueous solutions of alkali silicates or magnesium chloride, or waste cellulose liquor; mineralizers such as fluorides of sodium, calcium or magnesium; pulverized hard substances such as silicon carbide; and materials such as gum or dextrin.  Specification 441,516 is referred to.
Patent GB-664295-A (GB)
Title: Improvements in or relating to automatic vehicle couplings
Inventor: CHANDLER FREDERICK
IPC: B61G1/40
Filed: 1949-04-29
Abstract: 664,295. Couplings and drawgear for vehicles. NEATE BRAKE CONTROLS, Ltd. April 27, 1950 [April 29, 1949], No. 11468/49. Class 103(v) A vehicle coupling comprises a coupling member attachable to one vehicle and adapted to be received by a retaining member attachable to another vehicle, the retaining member including one or more latches each in the form of a flat plate constituting in the normal position a throat having its largest dimensions at the entry thereto, the latches being resiliently urged toward the normal position but temporarily displaceable therefrom by the coupling member moving into a retained position in which the vehicles are coupled, and the coupling member is located against the end of the plate or plates remote from the throat, releasing means being assocated with one of the plates. In one embodiment, shown in Figs. 1 and 2, a cylindrical bar 4 carried by an arm 3 of a coupling member 1 is engaged by two plates 13, 14 pivoted about axes 10 to a retaining member 2. The plates are resiliently urged to the coupled position shown by helical springs 11. An operating arm 20, Fig. 4, is pivoted to the retaining member 2 and connected by links 21, 22 to pins 15, 16 projecting from the plates 13, 14 which plates may thereby be moved to a position in which the coupling may be disconnected. In a modification. Figs. 5 and 6 (not shown), a single pivoted plate engages the upturned end 38, Fig. 7, of a bar 38. The bar 38 is carried by an inverted channel section member 40 connected by bolts 42, 43 and springs 50 to an open-ended square member 44 relative movement between the members 40, 44 against the action of springs 50 being permitted by slots 47, 48. Specification 467,185 is referred to
Patent GB-936329-A (GB)
Title: A device for pulping fruit or vegetables and extracting juice therefrom
IPC: A47J19/02
Filed: 1962-03-26
Abstract: 936,329. Juice extractors. GIMELLI & CO. A.G. March 26, 1962 [March 27, 1961; Sept. 7, 1961], No. 11478/62. Class 28 (2). [Also in Group I] In a juice extractor of the type in which fruit or vegetables are pushed down a filling tube 43 and pressed against and torn to pulp by a rotated grating disc 42, whereupon the pulp is flung centrifugally against a rotating cylindrical or conical screen 41 through which the juice alone passes, the centrifugal screen is cleared of residual pulp, either continuously or intermittently, by means of one or more inclined vanes 46, 47, 48 whose working edges 46a, 47a, 48a are approximately helical and are brought successively or simultaneously to about 0.5 mm from the screen wall by being spaced circumferentially around, or vertically aligned on, a shaft 45, turned against a return spring 51 by a hand-lever 50. In the embodiment shown in Fig. 4 the centrifugal screen 71 is conical and the vanes 76, 77, 78 are mounted on a hollow shaft or pipe 74 rotated by a hand lever 75 latchable in either of two end positions of a slot 73a (Fig. 6, not shown) in a guide sleeve 73. The hollow pipe 74 serves also as a filling tube for fruit to be pressed against the grating disc 72. In further embodiments the vanes are brought into a pulpclearing position by radially sliding or by tilting the shaft to which they are attached. In all cases the pulp is finally ejected through an aperture or exit pipe in the centrifuge cover.
Patent GB-551829-A (GB)
Title: Improvements in and relating to thread-tensioning apparatus
IPC: B65H59/28
Filed: 1941-09-09
Abstract: 551,829. Winding bobbins &c. COURTAULDS, Ltd., and WHOLTON, F. Sept. 9, 1941, No. 11510. [Classes 120 (ii) and 120 (iii)] A device for maintaining the tension constant in yarns, threads, or the like being delivered from one point to another, e.g. in winding thread A from a cable B to a cone H comprises a frictional surface D between two fixed guides C, F, which lead the thread through substantially fixed positions and a movable guide E attached to a carrier which can move freely about an axle and move the guide over a path inclined to the direct path between the frictional surface and one of the fixed guides; the axis about which the carrier can oscillate is in a horizontal plane between that passing through the centre of the frictional surface and that through the fixed guide F, between which and the surface D the guide E moves, and the carrier has an adjustable weight M and is provided with a stabilising device other than a weight loosely inserted in a hollow disc or with no stabilising device. As shown the carrier K is an unweighted hollow disc pivoted at L but in a modification the disc is replaced by a pivoted bar. Specifications 523,580 and 551,828 are referred to and as described in those specifications electrical contacts may be fitted to close a circuit when the adjustable weight reaches a certain position and ring a bell or operate a knock-off device to stop the machine when the thread breaks or undue variations in tension occur.
Patent GB-495943-A (GB)
Title: Improvements in circuits for reducing distortion with degenerative reaction
IPC: H03F1/36
Filed: 1938-04-14
Abstract: 495,943. Valve amplifying circuits. STANDARD TELEPHONES & CABLES, Ltd. April 14, 1938, No. 11551. Convention date, May 4, 1937. [Class 40 (v)] To prevent reduction of the sensitivity of an amplifier employing negative feed-back, the feed-back of output signal components is reduced with respect to the feed-back of distortion components by injecting incoming signal voltages into the feed-back circuit. A portion, E2, of the output voltage of the amplifier V2, V3, obtained from a winding B1 is fed via a potentiometer P2, together with a portion of the input voltage E1 derived from a potentiometer P1, to the grid circuit of an auxiliary valve V1. These voltages are in opposite phase and equal so that the output from transformer T2 consists of the distortion components produced in amplifiers V2, V3. The secondary of transformer T2 is connected in the cathode circuit of the first amplifier valve V2 in such a way that the signals injected are of inverse phase with respect to the distortion signals. In a modification, Fig. 2 (not shown), the auxiliary valve has two control grids to which a portion of the input signal and the feed-back from the amplifier output are separately applied. The output circuit of this auxiliary valve is also shown coupled to the input of the second stage of the amplifier. Reference has been directed by the Comptroller to Specification 467,833.
Patent GB-857474-A (GB)
Title: Improvements in or relating to methods of and apparatus for laying roads
IPC: A01B69/04
Filed: 1958-04-11
Abstract: 857,474. Photo-electric control systems. IMPRESA PIZZAROTTI & C.S.r.l. April 11, 1958 [June 18, 1957; Oct. 5, 1957; Oct. 30, 1957], No. 11598/58. Class 40(3). [Also in Group X] A level road surface is laid by an automatic machine which maintains a screed at a constant height irrespective of any irregularities over which the machine travels by vertical adjustment of the screed to maintain it in the same position relative to a predetermined optical reference line which may take the form of a beam of light projected from a position ahead of the machine. As shown, the screed 4 of the machine VF which controls the thickness of the layer of bituminous material 1 is vertically adjustable by rotation of the screwed shaft 5 either manually or by the servo-motor 13. A rod 7 is fixed to the screed a vertical displacement of which causes a spot of light projected by the instrument 11<SP>1</SP> to depart from the centre position 9<SP>1</SP> of the translucent screen 9 and the spot of light can be returned to its central position by manually rotating the shaft 5 which adjusts the height of the screed. The machine may be operated automatically by impinging a beam of light on the two vertically displaced photo-electric cells 10, 10<SP>1</SP> such that a layer of the desired thickness is laid when the cells are evenly illuminated, any deviation of the screed causing one or other of the cells to receive more light the potential difference so produced being amplified to operate the servomotor 13 and restore the screed to its desired position. In modifications, the screed may be controlled remotely by cable or radio by an operator ahead of the machine who observes a reference mark on the screen 9 in the crosswires of a telescope.
Patent GB-268565-A (GB)
Title: Improvements in liquid depth indicating device
IPC: G01F23/16
Filed: 1926-05-03
Abstract: 268,565. King, H. W., and King-Seeley Corporation. May 3, 1926. Indicators actuated by pressure of head of Liquid.-A liquid-level indicator applicable to the fuel tank 1 of a motor vehicle and cf the kind in which the pressure of the air in the upper part 6 of a partitioned inverted bell 9 immersed in the liquid is utilized to indicate the level of the liquid on a gauge 15 mounted on the dashboard of the vehicle, consists in the provision of reservoirs 21 - - 24 secured to the upper ends of tubes 25 - - 27 which communicate with the space beneath the partition in the bell, the reservoirs being alternately exposed to the air in the tank and filled with liquid due to the agitation of the surface of the liquid by the motion of the vehicle. After the filling of the reservoirs, the subsequent fall in the level of the liquid in the tank effects a corresponding fall of the level in the tubes and the carriage of the air trapped in the inverted cups 29 to the space beneath the partition in the bell from which the air passes through the orifice 8 in the partition so as to maintain the requisite quantity of air in the upper part of the bell. The lower end of the bell is provided with a fuel strainer and a fuel suction pipe 16 and the upper part with an air relief pipe 13 the lower end of which is located in a recess in the partition of the bell. In a modification, the lower part of the bell is formed with a partition for separating the reservoir tubes from the fuel suction tube which is located at the side of the bell and formed with a lateral opening 49 communicating with the lower part of the bell. In another arrangement, the reservoirs are of greater diameter but shallower than in the previously described arrangements and are formed with depressions in their peripheries so as to accommodate the fuel suction pipe.
Patent GB-702850-A (GB)
Title: Improvements in or relating to the manufacture of high permeability and relatively high electrical resistance material
Inventor: PARFITT PAUL
IPC: H01C17/065
Filed: 1951-05-21
Abstract: 702,850. Powdered magnetic material. FOWLER & CO., (LEEDS), Ltd., J. May 30, 1952 [May 21, 1951], No. 11777/51. Class 38 (2) A material having high permeability and high resistance is made by bonding a mixture of powdered refractory material and magnetic metal or metal compound, with a silicon ester. A suitable bonding agent is an organic compound of ethyl silicate to which has been added condensing agents such as piperidine and dicyclohexylamine. To determine the time of gelation, alcohol with 15 per cent total water content is added. The material is put into a mould, vibrated while forming a gel, removed from the mould, air dried and heated. The heating may stop at 3000 C. or in a reducing atmosphere go up to 850‹ C. or 1250‹ C. when the finely distributed silica forms a glassband. The material may replace laminated silicon iron in transformers operating at 10 KC.
Patent GB-1211064-A (GB)
Title: Improvements in gas turbine engines
Inventor: BERKEY DONALD CLAXTON
IPC: F02K3/06
Filed: 1969-03-05
Abstract: 1,211,064. Gas turbine ducted fan engines. GENERAL ELECTRIC CO. March 5, 1969, No.11822/69. Heading F1J. A turbofan engine comprises a core engine 10 having an axial flow compressor 18 downstream of which is a combustor 24, the hot gas stream from which drives a turbine 26 connected by a shaft 28 to the compressor rotor 20. The overall engine compression ratio, i.e. the pressure of air discharged from the compressor 18 to the pressure of air entering the turbofan engine is at least 20:1. A second turbine 14 is driven by this same hot gas stream and is connected by a shaft 16 to a fan 12 rotating within an annular duct. The hot gas stream is discharged from a nozzle 30 defined in part by a plug 32, and the fan air from a convergent nozzle 29 to provide a propulsive force. The by-pass ratio of the mass of air discharged by the fan 12 into the nozzle 29 to the mass of air entering the core engine 10 is between 5:1 and 10:1, which parameter in combination with the compression ratio of 20:1 or greater is effective in reducing specific fuel consumption. The temperature of the gas stream leaving the combustor 24 and entering the turbine 26 is at least 2000‹F, operation at which temperature minimizes the size and weight of an engine for a given thrust level with little or no increase in specific fuel consumption. The lighter weight and reduced aerodynamic drag of a smaller engine in turn result in lower rates of fuel consumption in propulsion of an aircraft. In order to cool the turbine, cooling air may be derived from the compressor without any substantial increase in specific fuel consumption.