baber/WOPTO huggingface dataset:
Patent GB-107203-A (GB)
Title: Improvements in Pneumatic Governors for Mechanically Operated Pianos and the like.
Filed: 1917-06-14
Abstract: 107,203. Thouvenot, P. E., Soc. Limonaire Freres, and Soc. Anon. des Pianos Pneumatic Franþaise. June 15, 1916, [Convention date]. Void [Published under Sect. 91 of the Act]. Actions, pneumatic. The valves and membranes are arranged in metal boxes with removable lids. In the double-valve action shown in section in Fig. 3, the tracker-pipe! 26 is soldered into a sleeve 25 flanged into a tightly fitting lid 24 which also carries the primary membrance pocket 27; the primary valve 30, 32 controls a passage 33 leading to the secondary membrane pocket 34. These parts are enclosed in a single box 23 to which a valve chamber 2 is connected by pressing over flanges 3, 4 on a tube 5, the other end of which forms a seat for the secondary valve 6, which is carried by a screwed stem 7 and is guided by ribs 8; a tube 11 forming the other seat is tightly fitted in a lid 9. A singlevalve action is similarly constructed. The exhaust tubes 21 are connected by rubber unions 41, Fig. 5, or other. wise to the main exhaust 36, and the tubes 12 to the striking pneumatics 38 as usual. The valve boxes are completely enclosed in a chamber to suppress noise.
Patent GB-872433-A (GB)
Title: Improvements in or relating to bistable flip-flop circuits and relay circuit arrangements incorporating such circuits
IPC: H03K17/64
Filed: 1959-03-12
Abstract: 872,433. Protective arrangements. SIEMENS - SCHUCKERTWERKE A.G. March 12, 1959 [March 14, 1958], No. 8593/59. Class 38 (5). [Also in Group XL (c)] A b-istable circuit for use in an electric protective system comprises two transistors having their emitter and base circuits crosscoupled and having two control switches respectively connecting the base at one of the transistors to the emitter supply terminal and the collector supply terminal whereby alternate operation of the switches causes the circuit to change from one stable state to the other. In Fig. 1 two transistors 3 and 5 have their collector and emitter electrodes cross-coupled through resistors 10 and 12 respectively so that either one or the other transistor is conducting. Switches 13 and 14 are connected between base and emitter and base and collector circuits of transistor 3, the latter connection including a resistor 15 or a capacitor. Operation of switch 14 renders transistor 3 conducting and 5 non- conducting and subsequent operation of switch 13 renders transistor 3 non-conducting and transistor 5 conducting. A lamp 7 is connected in series with the collector of transistor 5 and a relay is operated by the transistor amplifier 8 connected to the collector of transistor 3. In a protective system (Fig. 2), a number of such bi-stable circuits A, B, C, &c. are connected to a common mono-stable or bi-stable output circuit D adapted to operate a horn, each bi-stable circuit A, B, C, &c. having an individual switch 13 associated with a circuit to be protected and a common switch 14 to restore the circuits to normal after operation by the individual switches. In addition, a common switch 42 may be provided in parallel with switches 13 and a further switch 38 may be provided in the horn circuit, both switches being provided to permit the operator to test the operation of the circuit. The switches 13 could be operated when excess or reverse current blows in one of the phase conductors on the direct current side of a converter installation.
Patent GB-250233-A (GB)
Title: Improvements in or relating to machine guns for use on flying machines
IPC: F41A19/05
Filed: 1926-03-30
Abstract: 250,233. Gebauer, F., and Danuvia Ipari-Ús Kereskedelmi R-T. April 1, 1925, [Convention date]. Machine guns; fire between aircraft propeller blades, controlling and synchronizing.-The operating shaft of a motor-operated machine gun, adapted to fire between the blades of an aircraft propeller, is coupled to the propeller shaft by clutch mechanism which provides first a friction coupling and then a positive coupling. As shown in Fig. 2, a coupling shaft 5 is driven continuously by the propeller shaft 1. Rotating with the shaft 5 is a friction ring 8 surrounding a friction drum 11 on the gun shaft 3. A clutch collar 14 rotating with the shaft 5 and movable axially thereon has an inclined projection 15 engaging an inclined surface on the ring so that when the collar is moved axially away from the drum 11 the ring is tightened on the drum and the two shafts are coupled frictionally. The collar also has a dog 13 adapted to engage a recess 10 in the drum when the collar is moved in the opposite direction to couple the two shafts positively. The clutch is operated by relay mechanism comprising a continuously rotating cam 21, 22, a compound ratchet wheel 34, 35, 36, a clutch fork 39, and controlling pawls and levers. The ratchet wheel 36 is engaged by a pawl 25 on a cranked lever 23 which is normally held in the raised position by a lever 27. When this lever is raised by operating a clutch lever 28 through a Bowden wire 59 and hand-key 4, the lever first drops so that the pawl 25 engages the next tooth, and is then raised by the cam 21, whereby the wheel 36 is rotated one step and the clutch fork 39, which engages one of the teeth 34, is raised. The collar 14 is thus moved to apply the friction clutch. The end 22 of the cam raises the fork slightly farther and causes the fork to slip off the tooth 34, whereupon the collar 14 is moved by a spring 19 into positive engagement with the drum, the shafts 3, 5 thus being positively coupled. The gun shaft 3 carries a pinion 43 which meshes with a wheel 44, Fig. 3, connected to the breech-slide 48 by a connecting rod 45. The cartridge feed mechanism is operated by a cam 50 rotating with the wheel 44 and adapted to act on a lever 51 connected to ratchet mechanism by a link 56. The lever 51 is normally held in the inoperative position by a catch 54 adapted to be released by a second actuation of the key 4 beyond its first position. This second operation actuates a lever 60 connected to the catch 54 by a Bowden wire 61 and also operates the clutch lever 28 which is connected to a safety-stop 55 by a wire 62. During this second operation, the clutch mechanism is not operated since the cranked lever 23 is held by a lever 26. Firing continues as long as the key 4 is depressed. When the key is released, the lever 26 is raised to release the cranked lever, the wheel 36 is rotated one step, and the clutch fork is raised to the neutral position.
Patent GB-1388081-A (GB)
Title: Lens assembly
IPC: G02B15/22
Filed: 1973-02-22
Abstract: 1388081 Optical apparatus &c. K VOCKENHUBER and R HAUSER 22 Feb 1973 [25 Feb 1972] 8682/73 Heading G2J A zoom lens comprises an afocal attachment of variable magnification and composed of four lens systems I, II, III, IV which are spaced from a basic lens system V of fixed focal length, the attachment having its first and fourth lens systems fixed relative to the basic lens system and of positive focal length and the second and third lens systems being axially movable simultaneously but at a varying rate between the first and fourth lens systems and each having a negative focal length, the second lens system being used to vary the focal length of the zoom lens and the third lens system being used to maintain the image position constant; in which attachment the first lens system I is provided, for close focusing of objects, with an axially movable negative lens component Ia disposed in front of a positive lens component Ib which is nearer the basic lens system and which has two lenses Ls, L6 providing an achromatic doublet disposed between two separate positive lenses L4, L 7  each having its face of greater curvature disposed nearer the doublet. Numerical data are given for three embodiments.
Patent GB-1425651-A (GB)
Title: Channel firing thyristor
IPC: H01L29/10
Filed: 1973-02-22
Abstract: 1425651 Thyristors MOTOROLA Inc 22 Feb 1973 [3 April 1972] 8770/73 Heading H1K In a thyristor having a plurality of cathode emitter shunts 17 in the form of spaced portions of the base region which extend through the cathode emitter region to contact the cathode the shunts 17 are located at the apices of equilateral triangles and the edge of the gate electrode 15 is located at the apex of the triangle formed by the nearest shunts 17.
Patent GB-1049572-A (GB)
Title: Improvements in and relating to chairs
IPC: A47C1/04
Filed: 1963-03-06
Abstract: 1,049,572. Seats combined with mirrors. M. M. J. RENDALL and J. E. HALFORD. June 8, 1964 [March 6, 1963], No. 8917/63. Heading A4H. A chair has a seat rotatable on a shaft 6 which also forms a pivot for an arm 7 carrying a mirror bracket 22 on a shaft 21 rotatable in a bearing sleeve 20 and having a pulley around which passes a chain 24 secured to the sleeve 5 in which rotates shaft 6 so that as the user rotates the seat the mirror arm 7 rotates and the mirror bracket 22 is rotated in the opposite direction to re-position it.
Patent GB-1116141-A (GB)
Title: Modifying the surfaces of blow-moulded thermoplastic articles
Inventor: ALEXANDER JOHN RITCHIE
IPC: B32B27/00
Filed: 1965-03-02
Abstract: 1,116,141. Blow moulding. JAMES M. BROWN Ltd. 2 March, 1966 [2 March, 1965], No. 8952/65. Heading B5A. The printing or attaching of indicia to blowmoulded thermoplastic resinous articles is made easier by partially embedding a sheet or web of fabric in the surface of the article during the blow moulding thereof. The working material does not penetrate to the outer surface of the fabric, which surface thus forms a good base for printing upon or for receiving suitable adhesive for the attachment of, e.g. labels. The fabric may be woven, meshed, knitted or felted and may be composed of, e.g. metal, thermoplastic resin or paper filaments. A suitable adhesive may be used to locate the fabric temporarily in the mould.
Patent GB-683672-A (GB)
Title: Improvements relating to suction cleaners
IPC: A47L7/04
Filed: 1951-04-17
Abstract: 683,672. Suction cleaners. BRITISH THOMSON-HOUSTON CO., Ltd. April 17, 1951 [May 2, 1950; May 2, 1950], No. 8956/51. Classes 8 (i) and 8 (ii). In a canister type suction cleaner having at the top of its cover 2 an air inlet opening 22 through which an air inlet fitting 25 extends and rotates on a vertical axis, and a dust filtering bag 36 surrounding the lower end of the fitting, the air inlet fitting has secured to it within the bag 36 a lower end member 31 which directs air passing through the fitting 25 at a substantial angle to the vertical axis, while the filtering bag 36 is so shaped that the air blast impinges on its surface at an oblique angle in all rotational positions of the fitting and member. As shown, the filtering bag 36 has the form of a surface of revolution co-axial with the vertical axis of the air inlet fitting 25 and provides a dome shaped upper surface 37, against which the air blast impinges horizontally, and an annular dirt collecting pocket 45 remote from the air inlet. A porous cloth, &c., bag 38 supports the filtering bag 36 and in front of the fan 10 both are supported bv a perforated metal screen 9. At its mouth the filtering bag 36 is detachably secured to the cover by a dome-shaped member 40. The inlet fitting is L-shaped with the horizontal arm 27 inclining downwards to facilitate dragging the cleaner across the floor by the hose. Specification 245.148. [Class 8 (i)], is referred to.
Patent GB-932705-A (GB)
Title: Improvements in or relating to high-frequency surgical apparatus
IPC: A61B18/12
Filed: 1962-03-08
Abstract: 932,705. High-frequency surgery. SIEMENSREINIGER-WERKE A.G. March 8, 1962, [March 9, 1961], No. 9004/62. Class 81 (2). In order to reduce the fire and explosion risk when high-frequency surgical apparatus is used the equipment is divided into two units 5, 7 connected by a low-impedance cable 6. The power supplies, with the oscillation generator and a step-down transformer are accommodated in the unit 7 while the small unit 5, which may be placed close to the operating table, contains only a step-up transformer with an adjustable output and means for connecting it to the electrodes 15, 18. With this arrangement the heavy, main part of the equipment, in the unit 7, may be located well away from the operating table 1, so not only leaving more working space at the table but also keeping the apparatus away from any explosive vapours near the patient. The small unit 5 may be mounted on a column 4 or suspended from a wall or ceiling, so as to be above the level of the relatively heavy vapours.
Patent GB-1292388-A (GB)
Title: Hollow filaments
Inventor: CHAMPANERIA ASHOK JIVANLAL
IPC: D01D5/24
Filed: 1970-02-25
Abstract: 1292388 Hollow filaments E I DU PONT DE NEMOURS & CO 25 Feb 1970 [26 Feb 1969] 9023/70 Heading B5B A melt-spun textile filament is composed of a thermoplastic synthetic polymer and has at least three voids extending substantially continuously throughout its length; these voids account for a total of between 10 and 35%, preferably between 10 and 25%, of the filament volume, and the filament has an outer surface substantially free from re-entrant curves. Fig. 1 shows a spinneret orifice suitable for use in melt-spinning these filaments. Figs. 1a, 1b and 1c show cross-sections of filaments produced by orifices of this type. The orifice may be designed so that it has 4 T-shaped components, in which case a fibre such as that illus-  trated in Fig. 3 is produced, that is one with substantially quadrilateral voids. As illustrated in Figs. 1a, 1b and lc and in Fig. 3, the fibres may have a quadrilateral cross-section. Other shapes mentioned are triangular and pentagonal. Conventional polymer additives such as dyes, antistatic agents &c. may be added before, during, or after polymerization and spinning, and the filaments may be crimped and textured conventionally, usually without detriment. Both pre-ooalescent and post-coalescent spinning techniques may be used, but the latter is preferred since the former requires the injection of an inflating agent into the polymer to maintain the void structure. The examples illustrate the preparation of fibres of poly-(hexamethylene adipamide) by the process of the invention, the fibres being spun, hot-drawn and textured in a continuous operation. Polyethylene terephthalate fibres are also disclosed.
Patent GB-115938-A (GB)
Title: Improvements relating to Submarines.
Inventor: NEWTON PHILIP ARTHUR
IPC: B63G8/40
Filed: 1917-06-23
Abstract: 115,938. Newton, P. A., (Soc. Anon. Brevetti Belloni). June 23, 1917. Submarine vessels. - A diver's emerging chamber in a submarine vessel consists of two compartments A, B arranged in the form of an elbow tube and separated by a water-tight bulkhead L fitted with a scuttle D. The compartment A into which the diver enters from the submarine is filled with air under pressure sufficient to exclude water when the scuttle D is opened. The compartment B communicates with the sea through an opening in a plane at about 90 degrees to the plane of the scuttle. The opening is covered under normal conditions by a grating C. A second water compartment may be arranged above the air compartment. The air compartment may extend right across the vessel and open into another water compartment on the other side.
Patent GB-571938-A (GB)
Title: Improvements relating to method for the working of thermal power plants
IPC: F01K23/10
Filed: 1944-05-12
Abstract: 571,938. Hot-air plant. AKT.-GES. FUR TECHNISCHE STUDIEN. May 12, 1944, No. 9095. Convention date, May 14, 1943. [Class 7 (i)] In a thermal power plant in which at least the greater part of a gaseous working medium traverses a closed circuit in which it (1) has its pressure increased as by compressors 11 ... 13 with intercoolers, (2) has its temperature raised by a heater 1 consuming fuel from an outside source, (3) expands in a turbine 5 driving the compressors 11 ... 13 and an outside generator &c. 14, (4) traverses, on its way back to the compressors 11 ... 13, a heat exchanger 7 where heat is given up to compressed gas flowing from the compressors to the external heater 1, a second heat exchanger 9 transfers heat to a second air circuit in which the air is directed through a pipe 18 to a drying chamber 17 for the fuel. Fresh air enters this circuit at 23 and moist air is vented through a'pipe 21 into the flue of the external heater 1 which contains a preliminary drying chamber 15<1>. Alternatively, preliminary drying may be effected in the chamber 15<1> and the final stage in the chamber 17. A drying and sifting device may replace the drying chamber 17.
Patent GB-743346-A (GB)
Title: Improvements in or relating to fluid valves
Inventor: ALLEN GEOFFREY REX
IPC: F16K21/04
Filed: 1953-04-01
Abstract: 743,346. Valves. NATIONAL RESEARCH DEVELOPMENT CORPORATION. April 1, 1954 [April 1, 1953], No. 9111/53. Class 135. A non-return valve comprises a spring - loaded closure member 16 of tubular form coacting with a resilient seat 15 and controlling ports 26 in a fixed guide element 24 which also serves as a stop to limit the degree of engagement of the closure member with the resilient seat. The latter, which is held in position by a sleeve 18, is exposed to and deformed by the fluid pressure that closes the valve so as to provide an efficient seal against the closure member. The closure member is moved beyond the ports 26 to open the valve either by fluid pressure applied to the inlet 13 or by mechanical operation of a stem 29, e.g. by a gauging device screwed on to the end 13 for measuring the pressure in a container to which the valve may be fitted.
Patent GB-583530-A (GB)
Title: Improvement in air relay assemblies for automatic pilots
IPC: G05D1/00
Filed: 1944-05-12
Abstract: 583,530. Fluid-pressure servomotors. JACK & HEINTZ, Inc. May 12, 1944, No. 9118. Convention date, Oct. 14, 1942. [Class 135] An air relay device for operating the oil valve of an automatic pilot for aircraft comprises two complementary castings 1, 2 securing an operating diaphragm 4 between them and each having a single channel 17 or 18 communicating with the respective diaphragm chamber 5 or 6 and with inlet and outlet passages 12, 13 and 14, 15 respectively.
Patent GB-566095-A (GB)
Title: Improvements in and relating to feed collets
IPC: B23B13/12
Filed: 1943-06-07
Abstract: 566,095. Feed collets. PHILLIPS, A. L., and RAFFERTY, J. June 7, 1943, No. 9126. [Class 83 (iii)] Feed collets have a short section a of a size to suit the stock, connected to the feed mechanism by an adapter, and provided with one or more separate sections c. Feed grip is applied by one or more encircling springs d, e. When worn, the section c may be removed, built up by welding and reground. Only the short section a requires to be changed to suit a different diameter of bar. Specification 566,092 is referred to.
Patent GB-403929-A (GB)
Title: Improvements relating to cut-off machines
IPC: B24B27/06
Filed: 1932-03-30
Abstract: 403,929. Linkwork. AMERICAN CHAIN CO., Inc., 929, Connecticut Avenue, Bridgeport, Connecticut, U.S.A.-(Assignees of Robinson, H. G. ; 450, Woodstock Avenue, Stratford, Connecticut, U.S.A.) March 30, 1932, No. 9173. Void [Abridged as open to inspection under Sect. 91 of the Acts, July 1, 1932]. [Class 80 (iii).] In a machine for cutting off steel &c. by means of a thin abrasive wheel 25, the wheel is carried at the top of a swinging frame 26 carried by a shaft 27 pivotally mounted in a link 28, which is pivotally supported on a trunnion shaft 29 secured in supports 30 on parts 12 of the machine bed. The frame 26 is guided at its lower end, so that that end moves vertically, by rollers 35 movable respectively in a fixed guide 36 and an adjustable guide 37, and the frame has therein an arcuate slot 45, which moves over the trunnion 29; by this means, movement of the frame 26 by a handle 90 causes the wheel 25 to move in a horizontal straight line path through the work.
Patent GB-928612-A (GB)
Title: Improvements in the oxidation-esterification of alkyl benzenes to carbomethoxy benzenes
IPC: B01J31/26
Filed: 1961-03-14
Abstract: A polyalkyl benzene hydrocarbon having alkyl groups containing 1-4 carbon atoms is converted into a carboxylic acid methyl ester by reaction with methanol and molecular oxygen in the presence of a polyvalent metal oxidation catalyst.  The reaction is effected at a temperature of at least 140 DEG C. under a pressure sufficient to maintain the bulk of the methanol in the liquid phase, and a stoichiometric excess of methanol is used.  To recover methanol for re-use in the process, water, unreacted methanol and methanol oxidation products are separated from the reaction products and hydrolysed in the presence of an excess of water in the liquid phase at 100-600F. for 1-60 minutes, whereupon the recovered methanol is returned to the reaction vessel.  Apparatus for effecting the recovery of methanol in this way is described in some detail, and the apparatus may also include means for fractionating and possibly crystallizing the aromatic reaction products and for returning unreacted material to the reaction vessel.  The catalyst may be used in association with a catalyst promoter, e.g. cobalt, manganese or ammonium bromide or hydrobromic acid, and the aromatic starting material may be given a preliminary purifying treatment in known manner with a solid absorbent or an acid or an alkali.  Examples are given of the oxidation of p-xylene to dimethyl terephthalate, and reference is made also to the treatment of trimethyl benzenes, pentamethyl benzene, hexamethyl benzene, the corresponding ethyl, n- or iso-propyl, butyl and iso-butyl benzenes, cymene, 1-methyl-3-butyl benzene and 1-methyl-4-tert.-butyl benzene.
Patent GB-770535-A (GB)
Title: Improvements in or relating to fibrous mats and production thereof
IPC: D04H3/03
Filed: 1954-03-30
Abstract: 770,535. Agglutinated fibrous sheet materials. OWENS-CORNING FIBERGLAS CORPORATION. March 30, 1954 [April 24, 1953], No. 9283/54. Class 140. [Also in Group IX] A bonded fibrous mat is formed by projecting a strand 15 of glass filaments on to a deflecting surface 18 and thence on to a conveyer 25 (see Group IX). The deflection causes the strand to curl and the filaments in the strand to fuzz or disperse to some extent. Binder, which may be phenol formaldehyde, polystyrene, acrylic resin, starch or gum is applied by a spray 21. The mat is then heat-cured in an oven 26 and wound into a roll 28.
Patent GB-1292495-A (GB)
Title: Improvements in or relating to demodulator circuits for frequency-modulated signals
IPC: H03D3/04
Filed: 1970-02-26
Abstract: 1292495 Frequency demodulators SIEMENS AG 26 Feb 1970 [27 Feb 1969] 9303/70 Heading H3A A frequency demodulator comprises a circuit element T 1  for rapidly discharging a capacitor C 1  at each zero point of an input F.M. signal and an element T 4 , T 5  for applying a predetermined direct voltage to a low-pass filter (not shown) when the charging voltage of C 1  exceeds a threshold, e.g. such as determined by R 7 -R 9 , until the discharge of C 1  at the next zero point, the demodulated signal being derived from the filter. The pulses applied to input E 1  may be derived by feeding the F.M. signal through a limiter and a pulse shaper, the demodulated signal consisting of quantized data signals may be applied to a Schmitt-trigger stage to obtain a keyed direct voltage signal with steep flanks. The circuit arrangement may also involve an upper threshold limiting device for cutting off the predetermined direct voltage to the filter when a predetermined pulse duration is exceeded. The capacitor C 1  may be fed from a constant current source including transistors T 2 , T 3 . Fig. 4 (not shown), indicates another embodiment involving push-pull input stages as the limiter and the pulse shaper. The circuit can also be used in the measurement of frequency such as r.p.m. of a member, as the modulated signal is converted in the demodulator to a direct voltage which is directly proportional to the frequency.