baber/WOPTO huggingface dataset:
Patent GB-1481387-A (GB)
Title: Power amplifier having the signal distributed between a plurality of amplifying elements
IPC: H03F1/42
Filed: 1975-11-21
Abstract: 1481387 Transistor amplifiers BENDIX CORP 21 Nov 1975 [31 Jan 1975] 48036/75 Heading H3T A power amplifier, e.g. for 1090 MHz, in which high output is obtained by using parallel amplifying channels, comprises a plurality of amplifying elements 100-103, input means 54 for distributing input signal power between the elements and including a plurality of transmission lines 58-64 having different lengths and therefore unequal phase delays and being interconnected by resistors 70-75 at points having the same phase under normal operating conditions, and in like manner output means including transmission lines 80-86, resistors 90- 95, and means 76 for phase coherent addition of the amplified outputs. Under normal conditions the signal is equally distributed between the elements, and only negligible currents flow in the resistors 70-75, 90-95, but if the signal is unequally distributed, e.g. due to load mismatching or during preliminary setting-up, the points interconnected by resistors no longer have the same phase, and dissipative currents flow tending to protect the amplifying elements from overload, this action being dependent on the lines 58-64, 80-86 not having equal lengths. Input line 64 is coupled by a capacitor 106 to an impedance transformer 110 which matches line 64 to the emitter of transistor 112 which is a grounded base amplifier. The impedance transformer includes a tuning capacitor 120 and a resistor 122 both coupling to earth 118. Similarly an output impedance transformer 114 has a tuning capacitor 124, a resistor 126 and an output coupling capacitor 108. Unequal distribution of the signal between the amplifying transistors is associated with inequality of the mean emitter-collector capacitances owing to the non-linear relation between junction capacitance and emitter-collector voltage, Figs. 3-6 (not shown).
Patent GB-1323376-A (GB)
Title: Sectional fluid heaters
IPC: F24H3/10
Filed: 1971-10-18
Abstract: 1323376 Air heating stoves FRITZ HAUGG KG POLAR-LUFTERHITZER-WERK 18 Oct 1971 [15 Feb 1971] 48323/71 Heading F4S A fluid heater, particularly for heating air, is constructed from a plurality of interconnected heat exchanger elements 1, each element being of hollow plate form and comprising two rectangular dish shaped metal sheets 4 welded together at peripheral flanges 10. Adjacent heat exchange elements communicate with one another through respective aligned flanged openings 2, 5, 6. The flanges 8 of the lower openings are welded together at welding rims 9 to define a combustion chamber 2 within which a gas or oil fired burner is disposed. The flanges of openings 5 are welded together to define a common off-take connection 3 for the combustion gases leaving the elements 1, and the aligned flanges of openings 6 define passageways ensuring uniform distribution of the combustion gases throughout the heater. An insert (12, Figs. 4 and 5, not shown) of heat resisting material may be arranged within the combustion chamber 2. The heater is surrounded by a housing 11 having an inlet and outlet for the fluid to be heated in its walls. A blower is provided at the inlet. The fluid to be heated may be a liquid.
Patent GB-1424464-A (GB)
Title: Contact screw with cutting slot for electrical branch terminals
IPC: H01R4/36
Filed: 1973-10-17
Abstract: 1424464 Electric connectors GESCHWISTER PETRI HANDELGESELLSCHAFT mbH 17 Oct 1973 [19 Oct 1972] 48341/73 Heading H2E [Also in Division F2] A contact screw 1 for making connection with an insulated electric conductor by cutting away a portion of the insulation and conductor 25 comprises a screw-threaded shank 2 adjoined at one end by a smooth-surface tapered extension 4 formed with at least one cutting slot 6 which extends obliquely to the screw axis and whose depth decreases along the slot from the free end face 5 of the extension. The extension is frustoconical and the cutting edges of the slot in the end face 5 are sharp with the centre line (7, Fig. 2<SP>1</SP> not shown) of the end of the slot in the end face being offset from the diameter (8) to which it is parallel by one half the slot width. The conductor 25 is shown connected to a cable connected in the box 29 of cap 27 of a branch terminal, the screw 1 passing through the cap and into the insulation of conductor 25.
Patent GB-1535040-A (GB)
Title: Compositions with peroxides and process for avoiding scorching of ethylene polymer composition
IPC: C08L33/00
Filed: 1975-11-26
Abstract: 1535040 Curing ethylene polymers UNION CARBIDE CORP 26 Nov 1975 [27 Nov 1974] 48656/75 Heading C3P A scorch resistant vulcanizable composition comprises 100 parts by weight of an ethylene polymer, from 0À1 to 5À0 parts of bis(tertiary butyl peroxy isopropyl)benzene and/or 2,5-dimethyl-2,5-di-tertiary butyl peroxy hexane and from 0À1 to 2À0 parts of tertiary butyl hydroperoxide, optionally including cumene hydroperoxide. Examples are given in which the ethylene polymer is polyethylene, ethyleneethyl acrylate copolymer or ethylene-vinyl acetate copolymer. Tri(methoxyethoxy)vinyl silane is included in the ethylene-vinyl acetate copolymer composition.
Patent GB-487114-A (GB)
Abstract: 487,114. Draught regulators for stoves; closed solid-fuel stoves. BURGER EISENWERKE GES. Aug. 25, 1937, No. 23358. Convention date, Aug. 6. [Class 126] A valve which admits air into the outlet flue 9 of a closed solid-fuel or other room stove is mounted in a downwardly directed open-ended extension of the flue, and comprises a cylinder 14 with an open bottom 16, perforations 15 in its vertical walls, and an inwardly-turned bottom rim on which normally rests a light disc 17 which can rise to admit air when the chimney draught increases, the disc being guided by a central rod 18. The valve is inserted from below into the open end of the extension of the flue and is secured by means of a bayonet joint. Ducts 19 for gases distiUed from the fuel column are provided inside the stove, through whichthe gases are drawn from above the fuel column and delivered beneath the firegrate 2.
Patent GB-1084836-A (GB)
Title: Apparatus for adjusting the air pressure in the tyres of motor vehicles
IPC: B60C23/00
Filed: 1964-12-01
Abstract: 1,084,836. Regulating tyre pressures. W. RUF. Dec. 1, 1964 [Dec. 5, 1963; July 2, 1964], No. 48785/64. Heading B7C. [Also in Division F2] In an arrangement for controlling simultaneously the pressure in all the tyres of a vehicle in motion, a compressed air source is connected via pipe system 4 to a valve 7 in each hub including members 16, 13 which are respectively openable to inflate or deflate the tyre. To inflate the tyres, compressed air is admitted via the pipe system 4 to force back each spring. loaded valve plate 16 thereby allowing the air to flow along pipe 12 into the tyre. To deflate the tyres partially, e.g. for travel over mud slush or sand, the system 4 is opened to atmosphere. The pressure in the tyres then opens spring-loaded valve members 13 to vent the tyres to atmosphere through passages 15 until they are closed by their springs. In a modification (not shown) the valves open when the tyres are over-inflated.
Patent GB-1360685-A (GB)
Title: Polymeric compositions
IPC: C08F279/02
Filed: 1971-10-21
Abstract: 1360685 Graft polymers STANDARD OIL CO 21 Oct 1971 [13 Nov 1970] 48958/71 Heading C3G A graft polymer is produced by polymerization of (A) from 70 to 85% by weight of an olefinically unsaturated nitrile, (B) 2 to 13% of an alpha-olefin of structure wherein R<SP>1</SP> and R<SP>11</SP> are C 1  to C 7 -alkyl groups, (C) 2 to 30% of a monomer selected from a vinyl ester, acrylate ester, an acrylamide or a methacrylate ester, and (D) up to 17% of a vinyl or vinylidene aromatic monomer, wherein the combined amount of (A)+(B)+(C)+(D) is 100%, in the presence of from 1 to 30 parts by weight per 100 parts of (A) + (B) + (C)+(D) of (E) a rubbery polymer of 50 to 100% by weight of polymerized conjugated diene monomer and 50 to 0% of a polymerized vinyl or vinylidene aromatic monomer. In the examples, graft polymers are prepared in aqueous emulsion from (a) butadiene-styrene rubber or polybutadiene, acrylonitrile, isobutylene, styrene and methyl acrylate, N-t-octyl acrylamide, N-t-butyl acrylamide or vinyl acetate and (b) polybutadiene, acrylonitrile, diisobutylene, styrene and methyl acrylate.
Patent GB-1153457-A (GB)
Title: Gunn Effect Oscillator
IPC: H03B9/12
Filed: 1966-11-02
Abstract: 1,153,457. Amplitude modulation; pulse radar. INTERNATIONAL BUSINESS MACHINES CORP. 2 Nov., 1966 [2 Feb., 1966], No. 49046/66. Headings H3R and H4D. A Gunn effect oscillator is pulsed by a drive voltage modulated at a relatively low frequency. In Fig. 1 the Gunn effect device 12 is mounted in a symmetrical strip transmission line 17 short-circuited at 32 and including capacitors 34 and 44, earth terminals 46 and 48, drive terminal 20, and a transition 40 to a coaxial line (not shown) feeding a load 38. A pulse generator 22 is coupled to terminal 20 by an inductance 28 (lumped or distributed), and the equivalent circuit for the drive voltage (Fig 2B, not shown) comprises a parallel resonant circuit formed by inductance 28 and the two capacitors 34 and 44 arranged in parallel with the device 12. The oscillator 12 is pulsed on and modulated at the frequency of the parallel resonant circuit, and for maximum efficiency the pulse length is half the period of the modulation. The modulation signal is not transmitted to the load, and the equivalent circuit for the oscillation frequency (Fig. 2A, not shown) is such that the oscillation frequency is not transmitted to the drive circuit. In another arrangement, Fig. 7 (not shown), the inductance 28 is omitted and a parallel resonant circuit is connected between point 20 and terminal 16 of the Gunn effect device 12. In modifications of these arrangements, Figs. 8 and 9 (not shown), a modulation source (112) is inductively coupled to the parallel resonant circuit which is damped by a resistance (116 or 122) to prevent operation in the mode utilized in Figs. 1 and 7. Radar, Fig. 10. A Gunn effect oscillator 132 may be as shown in Fig. 1 and is pulsed and modulated at an intermediate frequency, e.g. 30 Mc/s. The oscillator is connected to an aerial via a duplexer 136 which is also connected to a non-linear detector 144; this may be a tunnel diode, and feeds an amplifier 146 tuned to the intermediate frequency. This system eliminates the need for a stable local oscillator, but sensitivity is improved if a local oscillator is included.
Patent GB-1076957-A (GB)
Title: New azo dyestuffs and processes for their manufacture and use
IPC: C09B62/447
Filed: 1965-11-19
Abstract: The invention comprises dyes of the general formula <FORM:1076957/C4-C5/1> wherein R is the residue of a diazo component which may contain an azo group and which contains at least one carboxylic or sulphonic acid group; X is an alkyl group having up to 4 carbon atoms, a carboxyl, carboxylic ester or carboxy-amide group or an aryl group; Y is an aliphatic fibre reactive acyl residue and n is 0 or a positive integer not greater than 7.  They are prepared by reacting the corresponding unsubstituted pyrazolone dye with an Nmethylol aliphatic acid amide in which the acyl residue is fibre reactive or with a Mannich ionforming N-methyl derivative of an aliphatic acid amide in presence of an acidic condensing or dehydrating agent, e.g. hydrochloric acid, zinc chloride, phosphoric anhydride, acetic anhydride phosphoric acid, aluminium chloridepyridine mixture and preferably oleum which may act as a solvent.  Mannich ion forming derivatives specified are the corresponding methylol esters of inorganic and organic acids, chloromethylamides and autocondensation products of the N-methylol acid amides.  Instead of the methylol compounds a mixture of formaldehyde and the unsubstituted acid amide may be used.  In a modification the dyes are prepared by reacting an acid amide, a dihalogenated dimethyl ether and an appropriate dyestuff in concentrated sulphuric acid.  The examples describe "inter alia" the preparation of disazo dyes containing two carboxyamidomethyl groups. The dyes are used to dye cotton and nitrogen-containing fibrous materials e.g. wool, leather, silk, polyamides and polyurethanes in yellow-orange shades.ALSO:Cotton and nitrogen containing fibres, e.g. wool, silk, leather, polyamides and polyurethane are dyed in yellow-orange shades using dyes of the general formula <FORM:1076957/D1-D2/1> wherein R is the residue of a diazo component which may contain an azo group and which contains at least one carboxylic or sulphonic acid group; X is an alkyl having up to 4 carbon atoms, a carboxyl, carboxylic ester or carboxyamide group or an aryl group; Y is an aliphatic fibre reactive acyl residue and n is O or an integer not greater than 7.
Patent GB-1498479-A (GB)
Title: Powder separators
IPC: B02C23/32
Filed: 1975-12-02
Abstract: 1498479 Pneumatic classifiers PFEIFFER AG GEBR 2 Dec 1975 [3 Dec 1974] 49335/75 Heading B2P  A separator for treating a gas stream carrying particulate material e.g. from an air-swept grinding plant, includes a separation zone provided with a by-pass. The separator may have a fan 3 rotatably mounted in a casing, Figure 2, with an annular by-pass duct surrounding the fan. The by-pass allows some coarse components of the material to remain unseparated and join the output air stream A. The by-pass may alternatively be formed as one or more ducts 5, Figure 3, which may have entry apertures of variable size. A duct may alternatively be formed through the centre of the fan shaft. An annular flap valve may replace the fan 3.
Patent GB-1205105-A (GB)
Title: Improvements in or relating to flashing assemblies for use between a roof and an adjoining wall
Inventor: SCHIERLING MANFRED
IPC: E04D13/143
Filed: 1968-10-17
Abstract: 1,205,105. Ventilating flashing assemblies for roofs. M. SCHIERLING. 17 Oct., 1968 [21 Oct., 1967], .No. 49353/68. Heading E1W. A ventilating flashing assembly for use between a roof and an adjoining wall comprises an elongate hollow section member 2 embedded in the wall 5 and which is provided with ventilating ducting 6 internally and/or externally, flashing 4 is secured inside the hollow section. The ducting may be box section or of castellated form. An extension 11 may be provided in the ducting 6.
Patent GB-1484039-A (GB)
Title: Photographic cameras
IPC: G03B17/02
Filed: 1974-11-15
Abstract: 1484039 Cameras BALDA-WERKE PHOTOGRAPHISCHE GERATE UND KUNSTSTOFF GmbH & CO KG 15 Nov 1974 [10 July 1974] 49457/74 Heading G2A A photographic camera has a rear opening cover with an aperture in which is secured a window for viewing the advancement of film, the windows being formed integrally with resilient means which biases a latch into a position in which it locks the cover to the camera housing in the closed position of the cover. In one embodiment, Fig. 1, the window 2 is fitted in an aperture 2' in a hinged rear cover 1 and is formed integrally with a spring arm 4 which urges a slidable latch 5, mounted on the rear cover, into locking engagement with the camera housing 7. The latch 5 has a serrated portion 13 which is manually engageable to slide the latch 5 against the bias of the spring arm 4 to release the locking engagement. In another embodiment, Fig. 2, the window carries a leaf spring 20 with a camming surface 25 which is engageable with a lug (21), Fig. 2a (not shown). When the cover is closed the spring 20 deflects downwardly to snap into a recess in the lug. Manual release is effected by a release knob 26 mounted on the end of the spring 20. In another embodiment, Figs. 3-3c (not shown), the latch spring is S-shaped and carries a bifurcated lug, one bifurcation serving as a latch to engage a recess in the housing and the other being serrated to facilitate manual disengagement of the latch. In a further.embodiment, Fig. 4, the window 2 is slidable in the aperture 2' and is integral with an arm 40 having a latching end which is urged into locking engagement by a pair of spring arms 42, 42' having free ends engaged with abutments 43, 43' in the rear cover. The arm 40 has an integral portion 45, Fig. 4a (not shown) facilitating manual release of the latch. In a further embodiment, Fig. 8, the window carries latching means comprising a pair of spring arms 80, 80' in turn carrying hooks 84, 84' for latching into recesses in the camera housing 7. The arms 80, 80' carry lugs 81, 81' which are manually displaceable towards each other to release the latching. Additionally, the window carries a leaf spring 85 with a curved end 86 which retains a battery 87 for a flash attachment by virtue of the resilience of the spring 85. In a further embodiment, Fig. 5, a slidable window 50 has an integral spring arm 55 engaged with an abutment 56 to bias the window to a position, towards the left as shown, in which retaining members 52 carried by the window hold batteries 53 in position on the rear cover. Other forms of battery securing means are described, Figs. 6, 7 (not shown).
Patent GB-1362503-A (GB)
Title: Polymeric compositions obtained from unsaturated nitriles and ela stomers
IPC: C08F279/02
Filed: 1972-10-27
Abstract: 1362503 Graft polymers SOLVAY & CIE 27 Oct 1972 [27 Oct 1971] 49669/72 Heading C3G A graft polymer is produced by polymerization of 100 parts by weight of a mixture comprising more than 50 but not more than 90% by weight of an acrylonitrile together with an ester of an olefinically unsaturated carboxylic acid in the presence of 1 to 40 parts of a rubbery co-polymer obtained by the polymerization of a mixture of monomers consisting of 70 to 35% by weight of a conjugated diene and 30 to 65% of an ester of an olefinically unsaturated carboxylic acid. The mixture of nitrile and ester may contain a minor quantity of another olefinically unsaturated monomer. Examples are given in which graft polymers are prepared by an aqueous emulsion process from butadiene-methyl acrylate rubber, acrylonitrile and methyl acrylate.
Patent GB-1240721-A (GB)
Title: Apparatus for automatic chemical analysis
IPC: G01N35/04
Filed: 1968-10-21
Abstract: 1,240,721. Automatic analysis. BODENSEEWERK PERKIN-ELMER & CO. G.m.b.H. 21 Oct., 1968 [19 Oct., 1967], No. 49779/68. Heading B1X. Apparatus for the automatic chemical analysis of samples comprises turntable 10 having positions 14 around its periphery for the reception of sample vessel holders 12, each position including a device for releasably securing a sample vessel holder, and conveyors 33, 44 operating in synchronism with the turntable for feeding sample vessel holders to successive securing devices and for removing sample vessel holders from successive securing devices. The sample vessel holder securing device may comprise a spring-loaded ball (28) carried by the turntable for engagement with an aperture (32) in the base of the holder when the holder is in position on the turntable (Figure 2 not shown). Conveyor 33 has upwardly projecting pins 38, 40 which engage the outer surface 42 of each holder to move it towards and on to the turntable. Conveyor 44 has pins 50, 52 which engage grooves 54, 56 in the holder being withdrawn from the turntable and move this holder outwardly, so pushing away holders already removed from the turntable towards a signal device 60. Movement of the conveyors is controlled by actuation of micro-switches arranged below the turntable and actuated by cams turning with the turntable.
Patent GB-1038050-A (GB)
Title: Improvements in preionizers for use in overvoltage protective devices
IPC: H01R33/74
Filed: 1964-12-07
Abstract: 1,038,050. Surge diverters. GENERAL ELECTRIC CO. Dec. 7, 1964 [Dec. 13, 1963], No. 49785/64. Heading H2H. A surge diverter comprises a pair of spaced gap electrodes 16, 18 in compensation with a parallel connected pre-ionizing device comprising an insulating body 22 of ceramic composition, plastic material or mica with a pair of spaced electrodes 30, 32 forming a second air gap 24 with a resistor 34 in series. A grading resistor 48 is connected across the electrodes 16, 18. A number of other configurations for the pre-ionizing device are given in the Specification (Figs. 5-7, not shown).
Patent GB-1093907-A (GB)
Title: Ruminant nutrient compositions
Inventor: DAVEY LAURENCE ALASTAIR
IPC: A23K50/15
Filed: 1965-11-25
Abstract: 1,093,907. Animal feeds. PFIZER Ltd. Nov. 17, 1966 [Nov. 25, 1965], No. 50128/65. Heading A2B. A ruminant nutrient composition, e.g. in the form of a cylindrical block, comprises a propionyl-substituted urea (e.g. monopropionyl urea or N, N<SP>1</SP>-di-propionyl urea) hydrolysable by rumen flora to propionic acid. The composition may comprise soya bean meal, barley meal, urea, bone meal, dicalcium phosphate, magnesium phosphate gum, cane molasses, talc, bentonite, sodium chloride, vitamins and distillers solubles.
Patent GB-1419661-A (GB)
Title: Vehicle transporters for road use
IPC: B60P1/02
Filed: 1973-10-29
Abstract: 1419661 Vehicle transporters LOHRCONSTRUCTION DE VEHICULES INDUSTRIELS SA 29 Oct 1973 [17 Jan 1973] 50279/73 Heading B7B A vehicle transporter comprises an upper platform supported by posts 1 articulated at 6 to the upper platform and to a lower platform at 7 or 8, so that in lowering the upper platform each post folds along the lower platform by displacement of its lower end in slideway 12, Fig. 3. The lower ends of the front posts are connected by a spindle 7 to a ram 10 articulated at 11 to the lower platform, the spindle 7 being provided at each end with a shoe 13 slidable in the slideway 12. A strut 2 pivoted at 3 to each post 1 is pivoted by a spindle 7 in an elongated hole 9. The posts are lockable in raised position by pegs (14), Fig. 4 (not shown), introduced into holes (15).
Patent GB-1439619-A (GB)
Title: Jet propulsion units and related apparatus
IPC: F02K7/12
Filed: 1973-10-27
Abstract: 1439619 Generating combustion products under pressure; gas turbine and jet propulsion plant H A KERSHAW 30 May 1974 [27 Oct 1973] 50290/73 Headings FIG, F1J and F1L Combustion apparatus having a jet type air compressor is provided with means for supplying fuel to the combustion air upstream of the combustion chamber. As shown a gas turbine engine comprises angularly spaced tubular combustion chambers 3 surrounded at their upstream ends by enlarged ducts 21 supplied with fuel by nozzles 22. Air drawn through a filter 32 by the nozzles 1 of a jet type compressor mixes with the fuel within ducts 21 before entering combustion chambers 3 via ports 24. The mixture is ignited by spark-plugs 9 and expands through a turbine 26 driving propeller shaft 27 via reduction gear 28. A portion of the exhaust gas flows through recirculation ducts 2 to nozzles 1, a further portion is recirculated from the exhaust duct 30 via a branch duct 31 and valve 33 to inlet ducts 21, whilst the remainder flows to atmosphere via valve 34. In modifications Figs. 1 to 3 (not shown) the fuel may be injected into a duct (4) upstream of the combustion chamber (3) of a jet propulsion engine by means of a gear-pump (6) driven by an airscrew (7) and feeding straight or coiled injection pipes (5). Alternatively a carburetter may be used. Additional electric or nuclear heating means may be provided.