baber/WOPTO huggingface dataset:
Patent GB-1082370-A (GB)
Title: A method of producing a paste which can be fired to form an electrically conductive circuit part
IPC: C03C17/06
Filed: 1965-08-06
Abstract: Metal crystallites are produced by dissolving the pure metal in an acid, adjusting the pH of the solution and adding a reducing agent to the solution to precipitate the crystallites while keeping the temperature constant.  The crystallites are then mixed, either unmodified or in the oxidized state, with noble metal particles, vitreous particles and a liquid vehicle to form a paste which can be fired to form a coherent electrically conducting mass.  Pd, Pt, Au and Ag metal crystallites may be used, the reducing agent in the first step being hydrazine, ferric acid, formaldehyde ascorbic acid or hydroquinone.  A dispersing agent, such as a silicone, gelatine or methyl cellulose, may be added to the solution prior to addition of the reducing agent.ALSO:Metal crystallites are produced by dissolving the pure metal in an acid, adjusting the pH of the solution and adding a reducing agent to the solution to precipitate the crystallites while keeping the temperature constant.  The crystallites are then mixed, either unmodified or in the oxidized state, with noble metal particles, vitreous particles and a liquid vehicle to form a paste which can be fired to form a coherent electrically conducting mass, e.g. on a ceramic substrate.  Pd, Pt, Au and Ag metal crystallites may be used, the reducing agent in the first step being hydrazine, ferric acid, formaldehyde, ascorbic acid or hydroquinone.  Glass particles may be added to the solution prior to reduction so that an intimate mixture of the glass and the metal crystallites is formed.  In Example (I) 60% by weight of glass + 1.5% colloidal silica is used; Example (II) uses 60% glass and Example (III) uses only 2%, each with Pd crystallites and Ag particles.
Patent GB-606582-A (GB)
Title: Improvements in or relating to modulated carrier wave systems
IPC: H03C3/14
Filed: 1945-12-13
Abstract: 606,582. Frequency and phase modulation. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Dec. 13, 1945, No. 33823. Convention date, Oct. 28, 1942. [Class 40 (v)] A frequency or phase modulation system comprises a line kept in oscillation by a valve, the frequency being varied by a signal applied to a reactance valve which has its anode and grid so connected or coupled to points on the line that they are excited in phase quadrature. In Fig. 1, the anode and screen of the valve oscillator T1 are connected together and are earthed through the battery B. A quarterwave concentric line L1 has its outer earthed and connected through condenser 4 to the anode and screen, and its inner connected through condenser 6 to the control grid G. The cathode lead includes a choke coil Z1. The reactance valve T2 has its anode connected through condenser 20 to one end of the inner conductor of the line L1, and its grid coupled at M to a loop 12 connecting the outer and the inner conductors at the other end of the line. Modulating voltage is applied to the reactance valve grid through a transformer and resistance R2; or it may be applied to other electrodes. The reactance valve functions as a variable capacity or inductance according to the polarity of the coupling M. Output may be taken from a coupling to the loop 12, or from the anode of the valve T1, which in this case is disconnected from the screen grid. In a modification, Fig. 2, a push-pull pair of oscillating valves 21, 23 is used, with the anodes earthed, the cathodes connected to earth through resistors 37, 39 and with their grids connected to a point of symmetry 34 through quarter-wave lines L2. A reactance valve 33, 35 is associated with each oscillatory valve, the anodes 40 being connected through condensers C1 to the grids of the valves 21, 23, their cathodes earthed through condenser-shunted resistors 45, and their grids connected to half-wave lines L3 inductively coupled to the low-voltage ends of the lines L2. Modulating voltage is applied across a resistance R to the grids or other electrodes of the reactance valves. The valves and circuits comprising the lower half of Fig. 2 may be omitted.
Patent GB-940434-A (GB)
Title: Improvements in or relating to the testing of signal transmission apparatus
IPC: H04B3/46
Filed: 1960-10-05
Abstract: 940,434. Testing radio-frequency systems; valve supply circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. Oct. 5, 1960 [Oct. 8, 1959] No. 34154/60. Headings H3W and H4L. [Also in Division G1] The amplifier valves 4, 5, 6, 7 of transmission apparatus are checked by devices included in said apparatus which comprises resistors 34, 35 in the anode circuits of valves 4, 5 and current-dependent resistors 36, 37 in the anode circuits of valves 6, 7 controlled by an A.V.C. voltage, diodes 40... 43 being normally biased to cut-off, but being conducting if the voltage through the associated anode resistor falls due to failure of any of the valves, when the current through conductor 38 will energize a relay 39 thereby closing contact 28 to operate alarm oscillator 27. A switch 47, 47<SP>1</SP>, 47<SP>11</SP> can be used to connect a voltmeter 46 across each anode resistor in turn. In order that measurements relating to valves 6, 7 may be made, the grids of these valves must be connected to a fixed bias and the current-dependent resistors 37, 36 converted into fixed ones and this is achieved by connecting the grids to earth and a resistor 55 in parallel with resistors 37, 36 by switches 47<SP>1</SP>, 47<SP>11</SP> respectively ganged together and to switch 47. A check of signal strength is made as follows. The screen grids of valves 6, 7 are connected to an alarm relay 57 which is so connected as to operate when the signal strength falls below a certain level, since the screen grid current of the valves is determined by the A.V.C. voltage and therefore by the strength of the received signal.
Patent GB-391899-A (GB)
Title: Improvements in appliances for playing table games
IPC: A63F1/06
Filed: 1931-12-10
Abstract: 391,899. Table games. SEARL, J. A., 67, Bedford Road, and BARNES, A. J., 30, Cheltenham Gardens, both in East Ham, London. Dec. 10, 1931, No. 34239. [Class 132 (ii).] Appliances for playing a table game comprise a set of distinctively-coloured discs G, F, cues for projecting the discs and a portable table provided on its undersurface with boxes and frames H, J, R for storing the discs, table legs E, and cues M. The underside of the table is provided with a number of holes N into which the table legs may be selectively fitted. The corners of the table are blocked off at angles of 45‹ and are fitted with pockets D. The playing. surface is marked out as shown in Fig. 2, and in playing a game the players project the larger discs F against the smaller discs in an endeavour to force the latter into the pockets.
Patent GB-437071-A (GB)
Title: Improvements in safety switch devices for electrically heated apparatus
IPC: H05B1/02
Filed: 1934-11-28
Abstract: 437,071. Thermal switches. SATCHWELL, L., Farnham Road, Slough, Bucking- hamshire. Nov. 28, 1934, No. 34244. [Class 38 (v)] A safety switch for an electrically heated apparatus comprises a metal plug 5 screwed into the apparatus and formed with a pocket 4 containing a capsule 1 in which a spring 2 is held compressed by a plug of fusible metal 3 which closes the end of the capsule. An insulating nut 9<1> screwed on to the plug 5 has screwed into it an insulating switch head 6 having fixed contacts 8 normally bridged by a silver disc 9 under the action of a spring 10. On overheating, fusion of the plug 3 releases the spring 2 pushing the capsule 1 downwards and moving an insulating member 10<1> to open the switch. The member 10<1> has an extension 11 which passes through the contact disc 9 and projects through a hole 13 in the casing to indicate that the switch has operated. In a modification, the pocket 4 is of considerable length and force is transmitted from the capsule 1 to the member 10<1> by means of a rod.
Patent GB-885703-A (GB)
Title: A method for the engraving of rolls intended for the manufacture of superficially-profiled concrete reinforcing rods, and rods produced by such rolls
IPC: B23H9/00
Filed: 1959-10-09
Abstract: 885,703. Concrete reinforcing rods. TORISTEG STEEL CORPORATION. Oct. 10, 1959 [Oct. 10, 1958], No. 34309/59. Class 20(4) [Also in Group XXII] A concrete-reinforcing steel rod 1 has helical ribs 3 and fins 2 formed by hot rolling (see Group XXII). After rolling the rod is twisted, stretched or cold rolled which also work hardens it.
Patent GB-884804-A (GB)
Title: Improvements in or relating to burner control apparatus
IPC: F23N5/24
Filed: 1960-10-06
Abstract: 884,804. Controlling burners. MINNEAPOLIS-HONEYWELL REGULATOR CO. Oct. 6, 1960 [Oct. 12, 1959], No. 34335/60. Class 75(1) [Also in Group XL(b)] A burner control apparatus comprises a fuel leak detector 19 which, when the burner is not operating, operates in conjunction with a flame detector 28 to prevent starting of the burner if a fuel leak is detected. The leak detector 19 comprises a valve 20 which is open when deenergized, a fan 21, an igniter 24 and a burner tip 23. If fuel leaks past the main burner valve 13 when closed it is drawn by the fan over the igniter 24 and burns at the tip 23. The flame detector 28 is therefore actuated and energizes a flame relay 29 to open contacts 33, 34 and to close contacts 35, 36. The open contacts 33 prevent energization of a main burner control relay 39 when a call for heat is made by a thermostat 37; the open contacts 34 prevent energization of an ignition transformer 18; the closed contacts 35 energize through contacts 41 of de-energized main relay 39 a heater 48 for the bimetal element 47 of a safety lockout switch 45 so that the switch opens after a predetermined time; and the closed contacts 36 merely connect the main burner valve 13 to open contacts 43 of the main relay 39 and are therefore ineffective. In the absence of a leak the contacts are as shown when the burner is inoperative. On a call for heat, thermostat 37 energizes main relay 39 and heater 48 of lockout switch 45. Contacts 42 close to complete a holding circuit for the main relay 39 and contacts 43 close to energize a pilot fuel valve 16, the ignition transformer 18 and the valve 20 which therefore closes to make the fuel leak detector 19 inoperative. If the pilot burner 14 ignites the flame detector 28 energizes the flame relay 29; contacts 36 close to energize the main fuel valve 13; contacts 34 open to de-energize the transformer 18 and contacts 33 open to de-energize the heater 48 of the lockout switch 45. The flame detector 28 is a Geiger tube condition sensor having a pair of electrodes in an ionized gas or a photovoltaic or photo-emissive cell.
Patent GB-1434386-A (GB)
Title: Rotary disc tumbler lock construction and key therefor
IPC: E05B29/00
Filed: 1973-07-19
Abstract: 1434386 Rotary disc tumblerlock LOCKING SYSTEMS INC 19 July 1973 [28 July 1972] 34363/73 Heading E2A A rotary disc tumbler lock has a body 16 and a generally cylindrical core assembly therein and a tumbler assembly forming part of the core assembly and having a plurality of rotary disc tumblers 43 each formed with at least one gating or notch 44 randomly disposed with respect to the gatings or notches formed in the other tumblers 43 to extend radially into the periphery of the tumbler and adjusted to be aligned with the aforesaid gatings or notches to form an elongate gating slot for the retention of a side bar 29. Each tumbler has a centrally located keyhole opening 47 and means such as a Z-shaped spring 42 are provided for returning the tumblers after actuation by a key to a position in which the various keyhole openings are superimposed so that a key can be received therein without disturbing the tumblers. As shown the tumblers are mounted in a spacer comb having annular spacers 38 which is itself mounted in a housing mounted for rotation in the body 16. In the locked condition the side bar 29 seats in a groove 31 being tapered (Fig. 4, not shown) such that on the elongate gating slot being produced rotation of the housing 32 relative to the body 16 will cause one of the tapered sides of the groove 31 to cam the side bar 29 into the slot. A rotatable tailpiece 19 of the lock interengages with 'the inner end of the housing (Figs. 12, 13, not shown) to be rotated thereby. A drillresistant spinner cup element 66 is mounted in the housing at the inner end of the key way formed by the keyhole openings 47 to prevent the tailpiece from being drilled out. The side bar 29 is urged to its locking position by a spring 68 and the housing is retained within the body 16 by a spring biassed detent 83. Each keyhole spring 47 has two contact surfaces 48, 49 for co-operation with the fitting 27a of the key 26 depending upon which way the key 26 is turned. The shank 28 of the key 26 is cylindrical and the fitting 27a is formed by surfaces which are tangential to the shank 28. The tumblers 43 may be provided with a plurality of gatings on notches 44 so that a different elongate gating slot is produced in each direction of rotation of the key and also a plurality of "false gates" 46 may be provided on each tumbler.
Patent GB-999383-A (GB)
Title: A process for the production of thermosetting compositions from epoxy resins and liquid rubber
IPC: C08L63/00
Filed: 1961-09-26
Abstract: A process for preparing adhesive and sealing substances comprises combining, immediately before use, a glycidyl polyether resin containing a curing agent known to be effective for curing or hardening liquid rubber with a mixture of an unvulcanized liquid rubber having groups capable of reacting with the epoxy groups of the glycidyl polyether resin and a curing agent known to be effective for curing the epoxy resin.  The glycidyl polyether resins may be derived from any dihydric or polyhydric alcohol or from any dihydric phenol. Epoxy resin curing agents specified are amines including phenolic amines and polyamides. Liquid rubbers specified are (A) polysulphide rubbers, (B) terpolymeric rubbers such as butadiene-styrene-methacrylic acid or butadiene-acrylonitrile-methacrylic acid and (C) chlorinated polyethylenes containing chlorosulphonic acid groups.  Curing agents for the specified rubbers may be (A) organic or inorganic peroxides; (B) sulphur, zinc oxide or sulphide and mercaptobenzothiazole; and (C) organic or inorganic peroxides or inorganic oxides.  Fillers, extenders, solvents and plasticizers may be premixed with either component.
Patent GB-800028-A (GB)
Title: Improvements relating to photographic processes
IPC: G03C8/00
Filed: 1956-11-12
Abstract: 800,028. Photographic silver halide transfer - reversal processes. INTERNATIONAL POLAROID CORPORATION. Nov. 12, 1956 [Dec. 27, 1955], No. 34506/56. Drawings to Specification. Class 98(2) Prints formed under the protection of a film produced by loss of moisture from a processing solution containing an alkaline silver halide developer and a silver halide solvent and also a film-forming material, which solution has been introduced between an exposed silver halide sheet and another sheet as in the manner of Specification 714,412, are stripped off and subjected to a washing solution of water and an organic liquid to remove residual photographic reagents which might discolour the prints but which solution prevents dissolution of the film. Washing while the film still contains a considerable proportion of water, as within ten minutes after stripping, need only be one second or so in duration, and such may be effected in the immersion device of Specification 800,027. The organic liquid in the washing solution may be methanol, ethanol, propanol or isopropanol and such solution may contain also a cross-linking agent to insolubilize the film - forming material, which latter may be sodium carboxymethyl cellulose of polyvinyl alcohol. Two examples detail the process using stannic chloride as cross-linking agent, and other such agents are quoted.
Patent GB-893283-A (GB)
Title: Modified cellulose
IPC: D06M13/288
Filed: 1958-10-28
Abstract: Phosphonomethyl ethers of cellulose having the general formula <FORM:0893283/IV (a)/1> in which R represents hydrogen, a salt-forming cation or an unsubstituted or substituted alkyl or aryl group and Z represents the residue of a cellulose molecule which has been modified by amination, etherification (including other phosphonomethyl etherification) and/or by esterification, are prepared by reacting cellulose (or cellulose modified as above to such an extent that it still contains one hydroxyl group per molecule) in an aqueous alkaline medium with a halomethyl phosphonic acid derivative having the general formula <FORM:0893283/IV (a)/2> in which X represents a halogen atom and R represents a salt-forming cation or an unsubstituted or substituted alkyl or aryl group, or with a halomethyl phosphonic acid chloride, the preferred reactant being chloromethyl phosphonic acid dichloride. The treatment of the cellulosic material considerably reduces its combustibility, particularly when R represents an ammonium radical and the modified cellulosic material contains 1-3 per cent by weight of phosphorous. The ammonium salts can be prepared by treating the cellulosic material with the ammonium salt of a phosphonic acid, but are preferably prepared by first preparing an ether in which R represents a replaceable metal cation, converting the metal salt into the corresponding free acid by treatment with a dilute aqueous solution of a strong mineral acid, and treating the free acid with a dilute aqueous ammonium hydroxide solution. A cellulosic textile material may be treated with an aqueous solution containing 20-30% of sodium hydroxide and 12 to 15% of the sodium salt of chloromethyl phosphonic acid at a temperature from 20 DEG C. upwards, preferably for 5-30 minutes at 60 DEG  to 140 DEG C. Excess salts are washed out from the treated material with water (if the modified material is insoluble in water) or with alcohol-water mixtures if it is soluble.  The cellulosic material may be fibrous cellulose such as cotton, regenerated cellulose in fibre form, carboxymethyl cellulose, paper, sulphoethylated cellulose, or aminised cotton.  The combustibility of the cellulosic material is reduced by the process of the invention and the modified cellulosic material is more stable than 2-phosphatoethyl ethers of cellulose, since it does not hydrolyse in the presence of acids or bases.  U.S.A. Specification 2,743,232 is referred to.
Patent GB-650842-A (GB)
Title: Process for renovating, constructing and maintaining surfaces of roads having as a basis a bituminous binder
IPC: E01C7/35
Filed: 1947-12-30
Abstract: Road surfaces of bituminous compositions which have deteriorated owing to the evaporation of the lighter fractions are regenerated by applying plasticizing oils, having a high distillation point, e.g. over 320 DEG  C. and allowing them to diffuse into the surface.  The surfaces may be composed of natural bitumen, coal-tar pitch, or mixtures thereof.  The oils are preferably mixed with oils of lower-distillation point, e.g. 60-210 DEG  C., such as coal-tar oil, which act as softeners for the bituminous material and so facilitate penetration of the plasticizing oils.  The surface to be treated should be clean, dust free and dry, and the regenerant should be applied as thinly as possible, e.g. 100 grams/square metre.  Sand of desired colour is spread over the surface when diffusion begins.  It is stated that the process may be applied also in the construction of new surfaces.
Patent GB-956018-A (GB)
Title: Improvements in or relating to gating circuit arrangements
IPC: H03K3/70
Filed: 1961-09-27
Abstract: 956,018. Transistor switching circuits. SIEMENS & HALSKE A.G. Sept. 27, 1961 [Sept. 28, 1960], No. 34652/61. Heading H3T. A circuit for applying any of a number of input signals to an output in response to command signals comprises a number of AND gates each having a first input terminal to which a respective one of the input signals is applied, and two further input terminals connected to control voltage sources which are controlled by the command signals and one of the input signals. As shown in Fig. 1, a bi-stable trigger circuit BK1 controlled by an input E1 produces outputs a1, a2 which are connected to inputs 1, 2 of AND gates KG1, KG2, respectively, the outputs of the AND gates being connected to a common output terminal A via OR gate MG. The output a2 is also fed to four further gates KG3 . . . KG6 which may be inhibited by application of a positive potential via either switch contact b1 or b2. The outputs from KG3, KG4 are used to control the state of bistable trigger BK2, and those from KG5, KG6 to control BK3. In the first condition of the circuit, with the switching b1, b2 as shown, gates KG4, KG5 are inhibited, and when output a2 is in its " one " state it passes through gate KG6 and switches trigger BK3 to apply a " zero " to inputs 5, 6 of gates KG1, KG2. These gates are thus inhibited and neither a1 nor a2 are passed to output A. If switch b2 is changed to inhibit gate KG6, the " one " from a2 passes through KG5, and changes the state of trigger BK3 to apply a " one " to inputs 5, 6. Trigger BK2 is set, by the " one " from a2 passing via gate KG3, to apply a " one " to input 3 of gate KG1 and a " zero " to input 4 of gate KG3, and thus KG1 is enabled to pass output a1 to the terminal A. If switch b1 is changed, gate KG3 is inhibited, and the next " one " from a2 passes through KG4 changing the state of trigger BK2 to enable KG2 and inhibit KG1, thus passing output a2 to the terminal A. The gates KG1, KG2 may comprise a pair of transistors TS1, TS2, Fig. 2, having their emitter collector paths connected in parallel and having a common load R2. Inputs 1, 3, 5 are fed via diodes D1, D3, D5, to the base of TS1 and the inputs 2, 4, 6 similarly connected to the base of TS2.
Patent GB-806976-A (GB)
Title: Improvements in or relating to glass-formed horticultural appliances
IPC: A01G9/20
Filed: 1955-12-03
Abstract: 806,976. Frames for dutch lights. PEDLEY S., PEDLEY W. K., and PEDLEY, R., [trading as PEDLEY & SONS, S.] Dec. 3, 1956 [Dec. 3, 1955], No. 34655/55. Class 20(3) A double glazed dutchlight, or cold frame, etc. comprises a rectangular wooden frame having two sides 1 and one end 1 furnished with a pair of spaced grooves 2, 3, the remaining side being closed by spars 4, 4A, which are spaced to allow panes 5, 7 to be slid into the grooves 2, 3. The panes 5, 7 are locked in position by blocks 6, 8, e.g. of wood, which are screwed respectively to the spars 4, 4A, to engage the bottom edges of the panes 5, 7. A resilient draught excluding strip 9 is secured, by a lath 10 to the inner edge of spar 4A. If desired a lath 11 can be secured, as shown, along the opposite end of the frame to prevent ingress of rain etc. Vertical members, having grooves 2, 3, can be interposed between the end members of the frame to divide it into any predetermined number of smaller rectangular openings. Instead of grooves such as 2, 3, laths 15, 16, Fig. 10 may be arranged around the corresponding sides of the openings Each pair of laths 16 may be replaced by a single cap member having a groove in its under 'face to receive the upper end of the corresponding vertical memberl. Fig. 12 illustrates a metal frame arrangement.
Patent GB-190916-A (GB)
Title: A renewable bearing for use in connection with weighing machines
IPC: G01G21/00
Filed: 1921-12-24
Abstract: 190,916. Avery, Ltd., W. & T., (Hartwell, C. G.). Dec. 24, 1921. Knife edge bearings. -To prevent the leg 13 of a weighing-machine from swinging sideways it is fitted with a hardened steel bearing ring 10 having a sharp continuous ridge 7 in its bore. A projection 14a of a stay 14 passes through the ring 10 and contacts with the left or right hand portion of the ridge 7 as the leg 13 tends to move to the right or left respectively. The ring is secured to the leg 13 by screws 12 so that by withdrawing the screws and turning the ring round other parts of the ridge 7 may contact with the projection 14<a>. The portion 13<a> may be screwed into the leg 13 or integral with it as, shown.