baber/WOPTO huggingface dataset:
Patent GB-1121439-A (GB)
Title: Electronic tunable oscillator circuit
IPC: H03B1/00
Filed: 1966-07-01
Abstract: 1,121,439. Tuning transistor oscillators; frequency modulation. INTERNATIONAL STANDARD ELECTRIC CORP. 1 July, 1966 [3 Aug., 1965], No. 29688/66. Headings H3R and H3T. A voltage tunable oscillator circuit including a resonant circuit formed by an inductance L and a voltage variable capacitance C D , is provided with a feedback path including means for varying the feedback in accordance with the bias applied to the capacitance C D . In Fig. 2, the feedback path includes a second capacitance diode C DR , the two diodes being biased from a common source-U through respective resistances R1 and R2. In a modification, Fig. 3 (not shown), the second diode C DR  is omitted and C R  is connected to the junction of C D  and C S  so that C D  forms part of the feedback path. The variable feedback linearizes the frequency response of the oscillator amplitude by compensating for the variation of loss of the capacitance diode with bias.
Patent GB-226210-A (GB)
Title: Improvements in clocks for motor cars and other vehicles
IPC: G04C1/06
Filed: 1924-12-10
Abstract: 226,210. Szente, A. Dec. 10, 1923, [Convention date]. Electromagnetic interrupters. - In a clock for motor vehicles &c. which is rewound electrically or by hand the spring-controlled arma. ture 6 drives the ratchet 5 by means of a pawl 12 and on making contact between the pin 16 and the arm of the switch or contact lever pivoted at 18, the armature is periodically with. drawn to re-tension the spring. The switch is operatively coupled to the armature by a short pivoted link.
Patent GB-1181026-A (GB)
Title: Improvements in and relating to Burner Control Assemblies
IPC: D06C15/00
Filed: 1968-06-21
Abstract: 1,181,026. Laundry ironing machines. CHICAGO DRYER CO. 21 June, 1968 [13 Nov., 1967], No. 29737/68. Heading D1A. [Also in Division F3-4] In a gas heated flatwork ironer 10 the item to be ironed is carried on feed ribbons 12 under a finger roll 14 and between a main roll 18 and two padded compressions rolls 16 which are driven at a higher speed of rotation. The item may be discharged onto a table 20 or by means of a conveyor 22, below the level of the table 20, onto a receiving platform 24. A main drive motor 26 drives rolls 16 and 18 through a gear box 30 and gears 28, 32 and 34. A predetermined mixture of gas and air is led into an elongated burner tube (38) situated within roll 18 and gaseous products of combustion are removed via an exhaust hood 40.
Patent GB-799231-A (GB)
Title: Improvements in and relating to signalling systems
Inventor: CHOUDHURY SHAFI-UDDIN AHMED
IPC: G08C19/38
Filed: 1955-10-19
Abstract: 799,231. Electric selective signalling. BRITISH THOMSON-HOUSTON CO.. Ltd. Oct. 3, 1956 [Oct. 19, 1955], No. 29892/55. Class 40 (1). In a remote angular-position indicating or control system a selsyn-type machine is used having rotatable primary winding 1, Fig. 1, and a stationary secondary winding 2, the latter being a three-phase winding, to two or more phases of which a single phase voltage is applied through a rotatably adjustable switching device 5 so that a resultant field is produced having a selected angular position determined by the angular position of the switching device. The primary winding 1 is also energized with the single-phase voltage so that it moves into alignment with the resultant field. The switch 5 has three banks of contacts 7, 8, 9, Fig. 3, each with a contact arm 10, the arms being ganged together. The bank 7 has inner contacts 11, 12, 13 and outer contacts 11<SP>1</SP>, 12<SP>1</SP>, 13<SP>1</SP> which are connected to the outer ends of the corresponding phase windings of the selsyn. The arm 10 of bank 7 interconnects the outer ends of successive pairs of the phase windings in alternate positions. The arms 10 of banks 8 and 9 select the phase windings which are to be connected to the single phase supply so that in each position of the switch 5 different connections are made to the phase windings and between the ends of pairs of phase windings as shown in Fig. 2, the resultant field adopting twelve different angular positions as indicated. The rotor may be damped by the provision of a short-circuited winding arranged at right-angles to the primary winding. The connecting together of pairs of phase windings in the secondary can be avoided by providing the rotor with a two-phase winding, alternate phases of which are short-circuited to obtain the same number of angular positions. By using an unsymmetrical three-phase primary winding, two phases of which can be short-circuited, twenty-four angular positions may be obtained. Specification 340,561 is referred to.
Patent GB-1274683-A (GB)
Title: Sutures and other articles having long-lasting germicidal properties
IPC: D06M16/00
Filed: 1969-06-12
Abstract: 1,274,683. Germicidal articles. SUTURES Inc. 12 June, 1969 [17 June, 1968], No. 29905/69. Heading A5E. An article having long-lasting germicidal properties and comprising at least partly a nitrogenous amphoteric, organic, film- or fibreforming material with germicidal ions bonded chemically to said material is obtained by contacting said article with an aqueous solution of an ionic germicidal salt (other than a surface active agent or cationically active antibiotic) to provide intimate association of germicidal ion and article, and then at least partly removing the aqueous solvent. Particular articles specified are films, fibres, threads, yarns, fabrics and textiles, e.g. as sutures, dressings or bandages, and the material thereof may be collagen, silk (which may be degummed), fibroin, or polyvinyl pyrrolidone. Germicidal salts disclosed are benzethonium chloride, benzalkonium chloride, lauryl and cetyl dimethylbenzylammonium chlorides, lauryl pyridinium halides, hexachlorophene and salts of organic acids, in particular of acid antibiotics such as penicillins and fumagillin. Optionally the article may be provided with both cationic and anionic germicidal ions, or anticoagulant properties may be introduced into the article by means of heparin ions. The Specification contains references to Specifications 1,207,853, 1,241,288 and 1,299,425.
Patent GB-1503176-A (GB)
Title: Arc steelmaking
IPC: C21C5/54
Filed: 1975-07-16
Abstract: 1503176 Flux for electro slag steelmaking FOSECO INTERNATIONAL Ltd 6 July 1976 [16 July 1975] 29920/75 Heading C7M A slag conditioner for use in electric arc steelmaking comprises by weight, 30-80%Al 2  O 3 , 10-30%Al and 5-40% fluorspar, up to 15% alkaline earth metal oxides e.g. CaO and/or MgO, up to 20% alkali metal carbonate, e.g. Na 2 CO 3  and up to 5% SiO 2  may also be included. The conditioner which is preferably used as 15kg/ton of steel may be mixed with CaO in a weight ratio of 1 conditioner to 2-8 CaO. The conditioner and CaO may be added as a mixture or separately to a deoxidized steel melt to form a slag with increased desulphurization potential.
Patent GB-1340296-A (GB)
Title: Ph indicator and process for preparing same
IPC: C09B11/08
Filed: 1972-06-27
Abstract: 1340296 pH indicators DAINICHISEIKA COLOR & CHEMICALS MFG CO Ltd 27 June 1972 [28 June 1971] 29993/72 Heading C2C pH indicators believed to have the Formulµ I and II (in which X is H or halogen and each of R 3 , R 4 , R 5  and R 6  is C 1-5  alkyl) are prepared by reacting a compound of Formula III with trimellitic acid anhydride in the presence of a Friedel-Crafts reaction catalyst, and, if desired halogenating the resulting compounds I and II in which X is H, to give the corresponding compounds in which X is halogen.
Patent GB-298987-A (GB)
Title: Improvements in and relating to x-ray tubes
IPC: H01J35/18
Filed: 1928-10-17
Abstract: 298,987. British Thomson-Houston Co., Ltd., of Coolidge, W. D.). Oct. 18, 1927, [Convention date]. R÷ngten-ray tubes.-In a R÷ngten-ray tube having a metal window close to the target, means are provided for electrostatically protecting the window from electrons passing from the target. In the form shown in Fig. 1, a window 3 of about half an inch in thickness and formed of ferro-chrome containing about 25 per cent of chromium, is secured to the metal portion 2 of the tube and a metal grid 6 is placed between the anode target 5 and the window. The grid 6 may be connected to the cathode 4 or be insulated therefrom. In a modification, the window is welded to the metal portion of the tube and connected to one of the cathode leads, the glass stem portions being connected by metal sleeves welded thereto. Specification 208,108 is referred to. The Specification as open to inspection under Sect. 91 (3) (a) comprises a second modification in which the whole of the tube is made of glass and the metal window is sealed therein by enclosing the edge of the window in a glass rim and fusing this to the envelope, the window being held between two polished steel surfaces large enough to conduct heat away from the window during fusion. The metal window may, in all the modifications, be reinforced by wire netting or a perforated metal sheet. This subject-matter does not appear in the Specification as accepted. Reference has been directed by the Comptroller to Specification 242,915.
Patent GB-731830-A (GB)
Title: Improvements in or relating to operator's telephone headsets
Inventor: ROBERTON JAMES SAMUEL PATERSON
IPC: H04M1/05
Filed: 1951-12-21
Abstract: 731,830. Sets. STANDARD TELEPHONES & CABLES, Ltd. Dec. 12, 1952 [Dec. 21, 1951], No. 30010/51. Class 40 (4). In a headset, the transmitter is contained in a casing carried by the headband and is connected to a mouthpiece by an acoustic passage provided with at least one joint to allow horizontal movement of the mouthpiece, vertical movement being facilitated by a joint between the transmitter casing and the headband. As shown, the receiver 2 and transmitter 3 are both contained in a housing 1 which is attached to a headband 8 by means of a ball-and-socket joint 9, and the transmitter 3 is connected to a mouthpiece 7 by an articulated tube 6 as described in Specification 716,801. The headband 8 also carries a headpad 13 and a flexible pad 10 adjustably mounted near the end of the headband. The pad 10 may be connected to its mounting member 11 by a ball-and-socket joint 12, or the pad 10 and member 11 may be moulded as one piece out of flexible plastic or similar material. In a modification (not shown), the transmitter 3 is carried in the pad 10 instead of in the housing 1 with the receiver. Instead of being universally articulated, the tube 6 may have a single hinged joint, with swivel joints at both ends.
Patent GB-159614-A (GB)
Title: Improvements in electric switches
IPC: H01H19/46
Filed: 1919-12-03
Abstract: 159,614. Jamie, R. C. S. Dec. 3, 1919. Switches; switchboards; cases; contacts. - A series-parallel switch for connecting two sets of electrical appliances such as batteries, lamps, and dynamo-electric machines in series or in parallel, and disconnecting them, comprises two mechanically coupled contact arms both permanently connected to the terminals of one of the devices and one connected to one line of the main circuit, the arms being movable to co-operate with two freed contacts permanently connected to the terminals of the other device and one of them connected to the other end of the line of the main circuit. As shown in Fig 1 applied to the lighting system of a motor vehicle, two similar switches A, B connect the head-lights H<1>, H<2> and the side-lights S<1>, S<2> in series and in parallel, the tail-light being in circuit at all times except when both switches are in the off position. Each switch comprises two insulating-sectors 4 spaced apart and mounted within a casing on the pivot 10 and movable by an exterior lever; the upper sector carries the angularly-displaced contact arm 3. The arm 2 is connected with a contact disc 11 insulated on the spindle and engaged by an upper contact spring 25 fixed externally in the casing and connected to the circuit by the terminal 30. The contact spring 25 is double-ended and serves as a collector for both switches. A lower contact spring engages a lower contact disc in engagement with contact member 3 and is connected to terminal 28, a separate contact spring being employed for switch B and connected to terminal 29. A double-ended non-contact spring 22 engages ntoched discs 16 on the spindles and determines the various positions of the switches. The contact members engage with upper and lower interconnected spring contacts 31, 32 and lower spring contact 33 which is reinforced by a spring steel strip 41 plated with good conductor metal. The contact 33 in all positions of the switch except the off position, is pressed by the lower sector into engagement with a spring contact 44 in the circuit of the tail lamp. The circuit connections are shown in Fig. 1, in which the head-lights are in parallel and the side-lights in parallel. By bringing the contact arms 3 into engagement with the fixed contacts 32, the lamps are connected in series. A diagrammatic arrangement is shown in Fig. 4 for connecting two batteries in series or parallel by means of a switch having two coupled pivoted arms 2, 3.
Patent GB-649625-A (GB)
Title: Industrial load handling truck
IPC: B62B3/06
Filed: 1948-11-19
Abstract: 649,625. Load-handling trucks. YALE & TOWNE MANUFACTURING CO. Nov. 19, 1948, No. 30167. Convention date, April 24. [Class 78 (iii)] In a low lift truck of the kind having a lifting head 13 connected with a platform supporting standard 15 by swinging links, and means to automatically extend wheels 36 from the platform 14 when the standard is raised by power means, the swing links 16, 20 are of unequal length and are arranged so that the platform is horizontal in its extreme positions of adjustment, but therebetween it is tilted, so facilitating entry and removal thereof between the top and bottom members of a pallet. The standard 15 is raised against the pull of a spring 22 by a hydraulic thrustor 25 which pivots a bell-crank 28 about 29 so engaging a roller 30 thereon with a member 31 secured to said standard. The lower and longer link 20 is pivoted at 32 to a rod 33 which, when the standard is lifted, pivots a wheel supporting arm 35 about 34. In operation the platform is lowered as in Fig. 1 and is entered into the fork space in the pallet P as in Fig. 3 (not shown), rollers 37 serving to facilitate entry, the thrustor is then actuated and the platform lifts the pallet as in Fig. 4. On arrival of the truck at the new station the thrustor release valve is opened so lowering the platform in two stages, first until the rollers 37 are in their lowest position resting on plank x and wheels 36 are resting on the ground, and secondly, on subsequent lowering of the standard 15, the other end of the platform is lowered on to the plank y and the wheels 36 are simultaneously further retracted into the platform until they also are on the same level as planks x and y as in Fig. 7, so allowing unobstructed withdrawal of the platform assembly. The truck is propelled by a motor 11 mounted on the wheel A which is rotatable about a vertical axis by a steering arm 12. Specifications 575,925, 575,926, 575,955, 604,611 and 622,670 are referred to.
Patent GB-299015-A (GB)
Title: Process for synchronising synchronous machines
IPC: H02J3/42
Filed: 1928-10-18
Abstract: 299,015. Siemens - - Schuckertwerke Akt.-Ges. Oct. 19, 1927, [Convention date]. Synchronizing dynamo-electric machines. - In synchronizing a machine by switching it into circuit at approximately synchronous speed and low excitation the excitation is immediately and gradually increased. The choking coils or resistances in series with the machine may be short-circuited automatically after synchronizing. A resistance 7 in the field circuit may be automatically short-circuited on the closing of the main switch 3, the time constant of the field circuit controlling the rate of increase of excitation and being preferably twice the. natural oscillation period of the fully excited machine. A relay 11 controlled by the voltage across the choking coil or resistance 9, or by the current, and fitted -with a retarding device, may effect the short-circuiting of the coil &c. An ohmic resistance in series with the machine may be gradually decreased automatically as the excitation increases.
Patent GB-1106656-A (GB)
Title: Improvements in automatic radar tracking systems
IPC: G01S13/70
Filed: 1965-07-15
Abstract: 1,106,656. Frequency modulated radar. COMPAGNIE FRANCAISE THOMSON HOUSTON-HOTCHKISS BRANDT. 15 July, 1965 [17 July, 1964], No. 30170/65. Heading H4D. In a frequency modulated radar system, radiation is transmitted starting at time t<SP>1</SP>=0, with an angular frequency given by #(t)= # 0  + αt<SP>1</SP> (see Fig. 1b) and, after a sound trip delay of #, an echo signal Ei is received with an angular frequency given by #(t) = # 0  + α(t<SP>1</SP> - #). The echo signal thus has the form A gating signal is applied to a gate 2, receiving the echo-signal at the output of gain controlled input amplifier 1, having a duration T and commencing at a time (# + t 0 ) supposedly synchronous with the commencement of the echo signal (i.e. it is assumed that t 0 =0). The gated echo signal is fed via a " total " signal path 20 and a " difference " signal path 10, to respective mixers 21 and 11. An oscillator 50 is triggered by the gating signal to generate a signal having an angular frequency given by # 0 +# 0 + α(t<SP>1</SP> - 0 - t 0 ). This signal is applied to mixer 21, to produce a " total " beat signal, Fig. 1b, having a duration # and an angular frequency of (# 0  - αt 0 ). The oscillator signal is also applied to a phase reverser 51, which reverses the phase of the oscillation after a time #/2 and   applies its output to mixer 11. The output of mixer 21 is applied to a narrow band filter 23, centred on frequency # 0 , to give a signal which is applied to one input of phase demodulator 3. The " difference " beat signal output of mixer 11 is applied to a similar narrow band filter 13, to give, from two signals corresponding to the two halves of the phase reverser output, a signal After passage through a 90 degrees phase shifter 14, this signal becomes and is applied to the second input of demodulator 3. The demodulator gives an output of the form:- or with reference to standard amplitude (A#/2)<SP>2</SP> and assuming t 0  is very small:- Thus this signal is a linear function of the error timing to of the gating signal, and by making α, #/4 large, a very sensitive error signal can be   produced for correcting the position of the gating signal. The detected output of filter 23 may be compared with a reference signal to produce a gain control signal for amplifier 1 whereby the amplitude of the signal # is kept constant. By replacing filters 13 and 23 by respective groups of parallel connected subfilters, having centre frequencies staggered either side of # 0 , feeding the outputs of corresponding ones of the sub-filters to respective phase demodulators and adding staggered biases to the outputs of the demodulators (see Fig. 2) the waveforms of Fig. 3a produced by each demodulator, may have their linear (t 0  # 0) portions aligned on a composite line, Fig. 3c, to give a much extended linear portion over which the equation E = αt 0 #/4 holds.
Patent GB-339044-A (GB)
Title: Two-way shock absorber
IPC: F16F9/26
Filed: 1929-10-07
Abstract: 339,044. Monroe Auto Equipment Co. Aug. 5, 1929, [Convention date]. Fluid-friction vibration-dampers. - Relates to apparatus of the type in which two opposed pistons are forced towards one another by springs contained in the cylinders in which the pistons work so as to engage opposite sides of an operating-lever mounted on a shaft supported in bearings in the casing of which the cylinders form part. A shock-absorber particularly applicable to motor vehicles is shown in Fig. 2, and includes a casing with two opposed cylinders 17 having pistons 40 which bear against the end of the lever 36 splined to a shaft 30 supported on bearings in the casing, the outer end of the shaft carrying an operating-lever 12 which may be connected to the axle of the vehicle, the casing being secured to the frame. The pistons are forced into engagement with the lever 36 by helical springs 46 which bear against annular discs 43 resting on shoulders in the pistons. One-way valves 44 are free to move between their seatings in the pistons and the discs 43, the arrangement being such that liquid can flow freely from the central reservoir past the valves 44 into the cylinders. Movement of the pistons into their cylinders is resisted by the restricted flow of liquid through the holes 47 and through the narrow gap left between the flat plate 50 and the part spherical plate 49. Both pistons may move relatively freely to a limited extent on either side of the central position, such movement. being rendered possible by the inclined conduits 58 connecting the cylinders to the central reservoir. A more extended movement in either direction results in one of the cylinders covering the end of the corresponding conduit 58 so that further movement is resisted more strongly. Each of the conduits 58 is provided 'with a handcontrolled leakage valve 62.
Patent GB-1058711-A (GB)
Title: Sila-piperazines
IPC: C08G77/00
Filed: 1963-07-31
Abstract: Sila-piperazines of formula <FORM:1058711/C3/1> wherein X is -CH2- or -Si(CH3)2- and Y and Z are each H or an aliphatic hydrocarbon radical, and hydrobromides thereof are prepared by reacting BrCH2Si(CH3)2Cl with NH3, a primary aliphatic amine, an aliphatic N,N1-disubstituted derivative of ethylene diamine, or ethylene diamine.
Patent GB-465411-A (GB)
Title: Improvements in the manufacture of laminated boards
IPC: D21J1/16
Filed: 1935-11-04
Abstract: Sheets of paper or the like are impregnated with the materials required for forming a heat-hardening phenol-formaldehyde resin, either separately or in admixture, and the sheets are piled, pressed and heated to form an infusible, insoluble resin in a single operation without preliminary heat treatment of the individual sheets to form a fusible condensation product.  The phenolic body may be an amino phenol, e.g. m-amino-phenol, a polyhydric phenol, e.g. resorcinol, or a carboxypolyhydroxy-phenol, e.g. a tannin such as catechin, gambier, or quebracho, and the formaldehyde may be replaced by hexamethylenetetramine.  Any solvents may be used which can be completely removed on drying; the solvent used for the second material may be one that has little action on the first material; or a common solvent may be employed.  For example, paper may be successively impregnated with aqueous hexamethylenetetramine and alcoholic catechin solutions or once with a solution of a phenol in aqueous formaldehyde.  In examples: sheets of paper are impregnated with aqueous hexamethylenetetramine solution, dried, impregnated with solutions of (1) catechin, (2) m-amino-phenol, (3) resorcinol, in industrial spirit; (5) "Liquid Gambier," (6) "Star and Crescent Gambier," (7) "Liquid Centrate," (8) sulphited quebracho tannin, (9) "Star and Crescent Gambier" and phenol, (10) "Star and Crescent Gambier" and resorcinol, in water; then cut to size, piled, and laminated under heat and pressure; (4) sheets of paper are impregnated with a solution of quebracho tannin in aqueous formaldehyde, dried, and laminated under heat and pressure.  The Provisional Specification refers in general to heat-hardening resins and specifies also "polyamine-formaldehyde" resins.