baber/WOPTO huggingface dataset:
Patent GB-1222014-A (GB)
Title: Optoelectronic switch with turn-off drive
Inventor: BONIN EDWARD LEE
IPC: H03K17/795
Filed: 1968-05-31
Abstract: 1,222,014. Semi-conductors switching circuits; distributers. TEXAS INSTRUMENTS Inc. 31 May, 1968 [27 Sept., 1967], No. 26158/68. Headings H3T and H4P. [Also in Division H1] A photo sensitive diode is connected to the base of a transistor such that when activated by photons it provides a reverse current path to discharge the base of the transistor and assist rapid switch off. Fig. 3 shows a photo-transistor which is rendered conducting when a photoemissive device P 1  is energized and which is switched off by de-energizing P 1  and energizing a photo-emitter P 2 . The latter causes a photosensitive device P 2  to provide a reverse voltage between collector and base and thus discharge stored carriers. The device P 2  may alternatively be connected between the emitter and base. The energizing periods of photo-emitters P 1  and P 2  may slightly overlap, may be spaced or may change over together. Photon emitters are preferably semi-conductor diodes and the device S may be a solar cell, a diode or a transistor having its base and collector strapped. A lens or tube may couple the photo-emitter to the photo-responsive device. Multi-emitter transistors may be operated in this way, the transistor either being of the photo-transistor type or operated by a photosensitive device providing the base current. Fig. 7 shows an analogue signal change-over or commutator circuit using double emitter transistors in this manner. A conduction path between the emitters of transistor 43 is provided when the photo-emitting diodes P are energized at 48, 50 so as to cause photo-diodes S 1 , S 2  to provide a base current. When diodes P 1  are de-energized a voltage is also applied at 56 and 58 to energize P 2  so that S2 discharges the base and simultaneously energize diodes P 3  to provide a conduction path between the emitters of 44. Conduction may then be switched back in a similar manner to 43 or the four transistors may be switched on and off in a cyclic sequence. The pairs of transistors such as 43 and 44 are made as a unit. In Fig. 8 (not shown) an alternating sine or square wave is applied to two photon emitter diodes in reverse parallel so as alternatively to switch on and rapidly switch off a transistor.
Patent GB-1513411-A (GB)
Title: Winding for transformers and chokes
IPC: H01F27/28
Filed: 1975-06-19
Abstract: 1513411 Transformers and inductors TRANSFORMATOREN UNION AG 19 June 1975 [19 June 1974] 26170/75 Heading H1T In a winding for a choke or transformer comprising m (as shown 8) parallel conductors arranged as radially superposed turns of disc layers, the disc layers being arranged in axially separated sections (as shown four sections I, II, III, IV), with the radial position of any conductor remaining the same in all the disc layers of a section and the radial position of each conductor being changed at cross over zones 12 between sections, m is given by 2 x<2>+x/2 . alpha<x+1> where alpha and x are integers, the m conductors being divided into l groups each of R conductors where l = 2 x<2>-x/2 . a<x> and R = 2<x> À@ and the number of conductors per group R is equal to the number of sections. Thus, as shown the 8 conductors are divided into 2 groups of four conductors and there are four sections I, II, III, IV. One group comprises 1' 4' 6' and 7' (single superscript ') the other 2", 3", 5" and 8" (double superscript "). The innermost position is occupied by only conductors from the first group 1' 4' 6' and 7', and each radial position belongs to one or other of the two groups in this way. The cross over zones serve as radial cooling channels. The speech mentions an arrangement of 64 conductors in 8 groups of 8 (i.e. a=2 x = 2).
Patent GB-932648-A (GB)
Title: Improvements in or relating to apparatus for testing fluid properties
IPC: G01N21/43
Filed: 1959-07-30
Abstract: 932,648. Testing fluid properties. MINNEAPOLIS-HONEYWELL REGULATOR CO. July 30, 1959 [Aug. 6, 1958], No. 26212/59. Class 40 (3). Apparatus for testing or determining the specific gravity, composition or colour of a fluid as a function of the refractive index and/or absorption characteristic of radiation in the visible and infra-red regions of the spectrum comprises a wave-energy guide receiving visible and infra-red wave-energy from a source of radiation and normally retaining the received energy by total internal reflection at the boundary longitudinal surface of the guide, means for maintaining the fluid to be tested in contact with at least a part of said boundary surface and a meter for indicating the emergence from the guide of wave-energy which is reduced by the energy loss taking place at the interface of the fluid and the guide in dependence on the variation of one or more physical properties of the fluid. Wave-energy from an electric lamp 12 is reflected by a hood 20 and passes in alternation to the ends 32, 36 of wave energy guides 34, 38 through an aperture 24 in a disc 22 rotated by a motor 30. A portion 58 of the guide 34 is surrounded by a sealed enclosure 40 through which the fluid to be tested is circulated by pipes 50, 52. The ends 60, 62 of the guides 34, 38 are opposite radiation-sensitive members 64, 66 having thermopiles 68, 70 connected by conductors 72, 74 and 78, 80 to a meter circuit 76 of the balanced type. The employment of the second guide 38 permits variation of the intensity of the lamp 12 without disturbing the normal balance of the meter indication. The guides 34, 38 are rods of a material which may be sapphire, quartz, an acrylic resin or a methyl methacrylate plastic and which is chosen to have a refractive index somewhat greater than that of the fluid or liquid to be tested, and normally provides total internal reflection of the wave-energy beam entering at the ends 32, 36. With the test fluid present in the enclosure 40, some of the wave-energy will be refracted at the interface portion 58, and result in a reduction of the wave-energy incident on the device 64. The unbalanced outputs of the elements 68, 70 are fed over the conductors 72, 74 and 78, 80 to an amplifier 84, Fig. 2, controlling a motor 94 which rotates a pointer 100 over a scale 102 and also moves an arm 108 over a potentiometer 110 until the inputs which are fed to the amplifier 84 are equal. In a similar manner, by using wave-energy of appropriate wavelength from the source 12, the absorption coefficients of various liquids may be determined or compared with a reference standard. A modification, Fig. 3 (not shown), employs a single wave-energy guide, similar to the rod 34 of Fig. 1, with the enclosure for the fluid to be tested, and a radiation source, assumed to be of unvarying intensity, disposed adjacent the end 32 of the guide 34. The meter employed is of the null balanced type as included in Fig. 1, or may be of the type described in Specification 568,204.
Patent GB-910569-A (GB)
Title: Improvements in electrical apparatus for measuring physical values
IPC: G01G9/00
Filed: 1960-07-28
Abstract: 910,569. Weighing-apparatus. SCOTT, V. N. July 3, 1961 [July 28, 1960], No. 26284/60. Class 143. [Also in Group XL (b)] In apparatus for weighing an object 23, the weighing platform 24 is supported on a plurality of hydraulic bellows 25, 26 forming part of an hydraulic system transferring the total pressure on the bellows to a chamber 30 containing a gasfilled bellows 31 opening into one half 8 of a chamber 7 partitioned by a diaphragm 6, the other half 9 of the chamber being at a suitable datum pressure. The weight of the object 23 produces a pressure difference across the diaphragm, causing it to distort and its two reflecting surfaces, equally illuminated from a single source, Fig. 1 (not shown), to reflect different amounts of light to a pair of photo-cells connected in a bridge circuit, giving an electrical signal representative of the weight of the object. Alternatively, the weight of the object may be measured by means of the pressure caused by the movement of a probe, loaded with the object, into the diaphragm chamber.
Patent GB-1389497-A (GB)
Title: Temperature responsive switches
IPC: H01H37/68
Filed: 1972-06-06
Abstract: 1389497 Magnetic switches HONEYWELL Inc 6 June 1972 [6 Aug 1971] 26400/72 Heading H1N A temperature responsive Curie point switch has a permanent magnet and a piece of ferrite material attracted to each other whilst the ferrite material is below its Curie point and the ferrite material is in intimate heat conducting relationship with a positive temperature coefficient resistor (PTC) with which it s electrically in series. In Fig. 1, the ferrite chip 18 co-operates with a permanent magnet 16 on a contact spring and is electrically in series with a PTC resistor 20. The chip and resistor may be mounted with thermally and electrically conductive layers on each side and between them between terminal members (Fig. 4, not shown). Fig. 5 shows contacts 51, 53 held closed by the attraction of a ferrite chip, on the contact spring 64, to a magnet 62. After heating above the Curie point has permitted the contacts to separate the switch can only be reset by operation of a retractively mounted push button, on which the permanent magnet is mounted, if the ferrite is below its Curie point. Arrangements such as that of Fig. 1 may be provided with two PTC resistors having respective switching temperatures above and below the ferrite Curie point.
Patent GB-278724-A (GB)
Title: Improvements relating to electric signalling systems and devices
IPC: G08C15/00
Filed: 1927-10-06
Abstract: 278,724. International General Electric Co., Inc., (Assignees of Allgemeine Elektricitõts Ges.). Oct. 6, 1926, [Convention date]. Void [Published under Sect. 91 of the Acts]. Tell-tale apparatus.-In a system for repeating quantitative measurements at a distance, the measuring device is adapted to produce current impulses of alternate polarity, the number of impulses being in proportion as to the quantity measured. As shown the rotatable shaft 1 of a gauge 2 carries a contact 3 which co-operates with contacts 4, 5 to generate impulses of reverse polarity for operating a polarized relay 11. The armature 12 is thus operated into engagement with the contacts 13, 14 to transmit alternately impulses of reverse polarity over the line wires 18 for stepping forward the polarized wheel 21 which controls a recorder 23. The relay 11 may be omitted or replaced by a relay which generates impulses of the same polarity for operating a non-polarized receiver. Condensers 9, 17 are used to ensure the production of impulses of short duration. In a modification transmission may be effected by wired wireless, a single modulating frequency or two such frequencies being utilized. A counting mechanism may be associated with the gauge 2.
Patent GB-339243-A (GB)
Title: Improvements in the manufacture and production of polymerisation of polymerisation products of diolefines
IPC: C08F36/04
Filed: 1929-08-30
Abstract: 339,243. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). Aug. 30, 1929. Caoutchouc, synthetic.-The polymerization of diolefines is effeeted in presence of alkali or alkaline earth metals or alloys' of them or of alkaline earth metal compounds with organic radicals which are not capable of ionization, the polymerizing agent being added gradually or in at least three fractions during the polymerization. Examples of suitable alloys are sodium-potassium, sodium-calcium, and sodium and potassium amalgams; and suitable organic compounds are sodium ethyl, potassium ethyl, potassium diphenylmethyl methane ((C6H5)2-CK-CH3), sodium triphenyl methane, potassium triphenyl methane, and lithium alkyls. The polymerizing-agents may be employed admixed with protective substances such as polymers of diolefines, rubber, paraffin, salt, or waxes. A part of the polymerizing-agent may be added to the diolefine at a temperature too low for any appreciable reaction, such as 0-10‹ C. Solvents such as hydrocarbons and ethers may be present. In the examples, (1) butadiene at 30‹ C. in an autoclave is treated with sodium which is pressed in the form of wire during 8 days; (2) sodium amalgam is added to butadiene at 0-6‹ C., and after two days the temperature is raised to 30-40‹ C. and sodium is added as described in the first example; (3) butadiene is mixed with a 1 per cent solution of potassium diphenylmethyl methane in ethyl ether, and further quantities of this solution are added after 12 hours and 3 hours respectively. Specification 307,308 (as open to inspection under Sect. 91 (3) (a) is referred to.
Patent GB-449150-A (GB)
Title: Improvements relating to speed measuring and indicating apparatus
IPC: G01P3/68
Filed: 1934-09-14
Abstract: 449,150. Electric signalling systems. ALLGEMEINE ELEKTRICITATS-GES., 2, Friedrich Karl-Ufer, Berlin. Sept. 14, 1934, No. 26483. Void [Abridged as open to inspection under Sect. 91 of the Acts, Aug. 1, 1935]. [Class 40 (i)] In photo - electric apparatus for measuring and indicating the speed of vehicles on roads or racing tracks, the indicating clock-face is disposed adjacent the track and is of such a size that it can easily be read by the driver of the vehicle. The face of the clock u may be graduated to show the speed directly, and the vehicle w may either intercept successively the light beams passing from two sources L1, L2 to two spaced photo-cells F1, F2, or the vehicle may carry a mirror, for example, a triple mirror, adapted to reflect a beam of light on the cells in passing. A synchronous motor c connected at a, b to the A.C. mains acts on the clock u by way of a clutch k which closes as soon as its magnet coil m is energized, this being dependent on the positions of the relays R1, R2, R3, which are controlled by the cells F1, F2 connected at d, e to the mains. When the vehicle passes the source L1, the contacts of the relay F1 close, and the coil R2 is connected to the mains n, and current flows through the clutch magnet m, the circuit of which is maintained closed by way of contacts R1. If the car now passes source L2, the cell F2 responds and energizes the coil R3 to open its contacts and interrupt the circuit of the clutch magnet. The clock is disposed beyond the second cell in the direction of travel of the vehicle, and two clocks, one for each direction of travel, may be connected to the same apparatus.
Patent GB-223401-A (GB)
Title: Improvements in and connected with swivel hooks
IPC: F16B45/04
Filed: 1923-10-24
Abstract: 223,401. Smith. T. S., and Owen, W. H. Oct. 24, 1923. No Patent granted (Sealing fee not paid). Hooks, closed.-The swivel-loop c of a closed hook a is made so that the hole c<4> in the base member of the loop can be threaded over the point a' of the hook up to an abutment a<6> at the head end, on which it can freely revolve. A splitring i is sprung into an annular recess in the barrel portion a<4> of the hook to keep the swivelhead in position.
Patent GB-618768-A (GB)
Title: Improvements in or relating to flyers for yarn-throwing and other textile machines
IPC: B65H57/20
Filed: 1945-10-10
Abstract: 618,768. Flyers for textile machines. FONDERIE DE PRECISION. Oct. 10, 1945, No. 26523. Convention date, Oct. 1, 1941. [Class 120(ii)] A flyer for a yarn throwing or other textile machine has a yarn guiding traveller which is free to slide along a leg of the flyer or an adjacent rod. During unwinding from a bobbin 2, yarn passes through an aperture 8 in a traveller 7, slidable on an adjustably mounted rod 6 equipped with rubber rings 10, 11 which act as cushions at the extreme ends of the run of the traveller. The rod 6 may be displaced with respect to the arm 4 on which it. is mounted, so that it lies at an angle with respect to the bobbin 2. A tube 9 may be used to load the traveller. In order to prevent rotation of the traveller 7 on the rod 6, the rod and the rod-receiving aperture of the traveller may have cross-sectional shapes which are non-circular, or a centrifugal mass may be applied to the traveller on the opposite side to the aperture 8. Instead of the aperture 8, a small grooved runner or roller may be used. Fig. 7 shows a flyer with a rigid frame 15 and removable rod 6 carrying a traveller 7 and shock absorbers 10a, 11a. Alternatively the traveller may be guided by a bent rod as in Fig. 9, the traveller being provided with cushions 18. The flyer may rotate on the spindle 1 on spherical bearing surfaces, as shown in Fig. 1, or balls may be interposed between the top of the spindle and a bearing rod similar to 19.
Patent GB-407965-A (GB)
Title: Improvements in polyhydric alcohol-polybasic acid resins
IPC: C08G63/48
Filed: 1932-09-24
Abstract: Tung oil and/or tung oil fatty acid modified polyhydric alcohol-polybasic acid condensation products further modified, if desired, with other drying oil acids, are mixed with an oil soluble phenolic body or with a phenolic body compatible with the condensation products before, during or after the condensation. Suitable phenolic bodies are the hydroxydiphenyls, a - and b -naphthol, p-amylphenols, o-n-butylphenol, p-benzylphenol, o-benzylphenol, salicylic acid and resorcinol.  Polyhydric alcohols include glycerol, mannitol, pentaerythritol, polyglycerols and glycol and polybasic acids include phthalic anhydride, adipic, sebacic, succinic and maleic acids, the hydrophthalic acids and the acids derived from the action of maleic acid and compounds containing conjugated double bonds.  In an example, the condensation product of glycerol, phthalic anhydride, tung oil, tung oil fatty acids and linseed oil fatty acids is heated with a mixture of o-hydroxydiphenyl and tung oil, diluted with turpentine and mixed with cobalt and lead linoleates to yield a varnish.
Patent GB-452955-A (GB)
Title: Improvements in or relating to phonograph reproducers
IPC: H04R9/12
Filed: 1935-09-26
Abstract: 452,955. Gramophone sound - boxes. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A. Sept. 26, 1935, No. 26623. Convention date, Sept. 29, 1934. [Class 40 (ii)] [See also Group XXXIX] In an electrical phonographic reproducer capable of reproducing either hill-and-dale or lateral-cut records indiscriminately and having a generating member in operative relation with a cranked member carrying a stylus, the cranked member is supported by cantilever springs in such a way that the generating member is constrained to move in substantially the same mode when the stylus co-operates with either type of record. In the application of the invention to a moving-coil instrument, the coil 20 is carried by a cup-shaped member 22 secured to a tube 23 of light metal which at its lower end rests on a pad 25 of damping material on the horizontal arm of a T-shaped member 26 provided with a vertical arm carrying the stylus 27. The T-shaped member is mounted on a block 32 by a V-shaped cantilever spring 30 capable of torsional and vertical movement and by a light wire 31 capable of horizontal and vertical movement so that the tube 23 together with the coil 20 moves vertically when the stylus engages a hill-and-dale or lateral-cut record. The upper end of the tube 23 is mounted by a V-shaped cantilever spring 28 similar to the spring 30. The block 32 carrying the springs 30,'31 is detachably secured to a member 29 which carries the spring 28 and a resilient centering ring 33 for the tube 23. In a modified construction, Figs. 2, 4 (not shown), the tube 23 is omitted and the cup-member is secured to the horizontal arm of the T-member. The spring 28 of Figs. 1, 3 is also omitted in the modified construction. The Specification as open to inspection under Sect. 91 is not limited to electrical reproducers
Patent GB-1046035-A (GB)
Title: A heating oven
Inventor: SAW PETER DOREE
IPC: F27D11/02
Filed: 1962-07-11
Abstract: 1,046,035. Ovens for laboratory use. CONTRONICS Ltd. July 9, 1963 [July 11, 1962], No. 26628/62. Headings F4B and F4W. An oven, particularly for testing the effect of temperature on small electronic assemblies, comprises a double walled, open bottomed box 1 supported so that it can be lowered to enclose a support 16 for the apparatus under test or raised to expose apparatus on the support 16 and a counterpoise arrangement such that the box 1 is held against a base 14 by grvaity in its lowered position, and can remain in its fully raised position or in intermediate positions. The oven 1 is supported by a pair of links 22 pivoted to the oven wall, and to a back plate 18 at each side. A bar 23 between the lowermost links 22 is connected to a bar 24 by springs 25, which form the counterpoise. The oven is heated by an electric element 6 embedded in a fibre glass strip wrapped round the inner shell of the oven. The inner shell has its inside surface blackened, and the temperature of the oven is thermostatically controlled.
Patent GB-978071-A (GB)
Title: Improvements in gas turbine engines
IPC: F02C3/08
Filed: 1963-07-04
Abstract: 978,071. Thermal regenerators. WILLIAMS RESEARCH CORPORATION. July 4, 1963 [Oct. 18, 1962], No. 26633/63. Heading F4K. [Also in Division F1] A rotary regenerator for a gas-turbine engine (see Division F1], comprises a core 65 having a hub 66 carried on a shaft 64, an outer rim 67 and a matrix of passages 68 defined by rings 69 of corrugated metal. A gear 73 on rim 67 is driven by a pinion 74. Cool air from the engine compressor flows radially inwards from chamber 75 through the matrix 68 and the turbine exhaust flows outwards from chamber 129. Seals 77, 79, 89 are provided between the core 65 and the adjacent stationary members.
Patent GB-991951-A (GB)
Title: Improvements in or relating to inverters
IPC: H02M1/084
Filed: 1963-07-04
Abstract: 991,951. Inverting. SIEMENS SCHUCKERTWERKE A.G. July 4, 1963 [July 7, 1962], No. 26639/63. Heading H2F. [Also in Division H3] A number of inverters supplying a common load are each driven by an oscillator, and the oscillators are maintained in synchronism by suitable interconnections. In Fig. 3, inverters 311, 312, 313 supply common bus-bars 33 from a D.C. source (not shown). Each inverter (Fig. 1) comprises a pair of thyratrons 15, 16 (semiconductor or gas) in bi-phase arrangement and a pair of transistors 12, 13 connected with a saturable transformer 11 to provide square drive pulses to the thyratrons. If the transistor base connections were made as shown at 181, 182 and 191, 192 then the transistors and transformer 11 would form an oscillator. But these connections are not made. An oscillator 321, 322, 323 in Fig. 3 comprising a transistor, resonant LC circuit and transformer with three secondary windings (Fig. 2, not shown), is associated with each inverter circuit as in Fig. 1. Two secondary windings having outputs in anti-phase are connected one at 181, 182 (Fig. 1) and the other at 191, 192. The third secondary windings of each oscillator (reference 215 in Fig. 3) are connected in parallel, so that all the oscillators keep in phase. To obtain a polyphase output, one phase from each inverter, the windings 215 are connected in series, and the oscillator outputs are then maintained at equal phase displacements.