baber/WOPTO huggingface dataset:
Patent GB-381583-A (GB)
Title: Improvements in and relating to the production of artificial moulded materials from cellulosic materials and binders
IPC: D21J1/08
Filed: 1931-06-29
Abstract: Moulded artificial wood sheets are made from cellulosic material such as wood pulp and paper by forcing a concentrated solution of a binding agent such as glue, gelatine, casein or albumen through the sheet material and moulding either during or after or during and after drying.  The impregnation may be effected by the use of a vacuum, hydrostatic pressure, pumps or centrifugal force.  The superfluous solution which passes through the sheets may be collected and concentrated, if necessary, for re-use.  Moisture may be removed from the cellulosic materials before impregnation by a preliminary treatment with a water repelling liquid such as benzine or trichlorethylene.  Waterproof properties may be imparted to the product by adding to the binding agents hardening agents for glue such as tannin, alum, aluminium sulphate, acetate or formate, or substances such as caustic lime or baryta which form insoluble compounds with casein and albumen on drying, together with substances which delay the action of the hardening agents, for example acetic or formic acid for glue and ammonia in the case of albumen.  After impregnation the binding agent is coagulated by cooling in the case of glue or by heating in the case of casein and albumen.  The sheet is then either subjected to slight pressure to remove the bulk of the water and finally dried without further pressure, or dried at a low temperature and subsequently heated under pressure, or the two methods may be used in combination.
Patent GB-708898-A (GB)
Title: Improvements in walls enclosing hot gas chambers or passages
IPC: F22B37/36
Filed: 1952-07-25
Abstract: 708,898. Furnace walls. BABCOCK & WILCOX, Ltd. July 25, 1952 [July 28, 1951], No. 18905/52. Class 51 (1) A wall for a hot gas chamber or passage comprises heat-insulating material 10, sheets 12 of expanded metal arranged at the outer side of the material 10 in adjoining sheets having inner and outer overlapping edge portions 14 forming a joint therebetween and a layer 16 of plastic heat-insulating material within which the sheets 12 are embedded and which is provided with a groove 17 formed therein outwardly of the metal sheets along the joint between the sheets. An additional layer 20 of asphaltic sealing compound is applied over the layer 16.
Patent GB-1206553-A (GB)
Title: Rotary electric switch
IPC: H01H1/36
Filed: 1969-04-14
Abstract: 1,206,553. Rotary spindles witches; electric contacts. STACKPOLE CARBON CO. 14 April, 1969 [14 May, 1968], No. 18910/69. Heading H1N. In a rotary spindle electric switch the stators comprise rings 1, 2, Fig. 1, of moulded insulating material carrying circumferentially spaced contact pins 6, 7 moulded or force-fitted in position. The pins 6, 7 may be tubular or may be the ends of connecting wire arranged to plug into a printed circuit board. The rings 1, 2 have co-operating studs 8 and recesses 9 for alignment with each other and with casing end plates 10, 14. The assembly is held together by spring clips 17, 18 on the rotor shaft 16. Collector rings 3, 4 may be retained between the rings and are located by the studs 8. A spring plate 29 for co-operation with detents 26 of a rotary indexing plate 25 is also mounted between the front plate 14 and the stator ring 1 and is located by the studs 8. In one example a rotor 21, Fig. 4, for co-operation between pins 7 and a stator ring 4 carries one or more tubular or coil spring contacts 23 located in radial recess 22. Alternatively the contacts 36, Fig. 8, may be of bent up metal located in recess of the rotor 37. Rotors 55, Fig. 14, for cooperating with short pins 7 only may comprise annular contact springs 56 on one or both faces of the rotor and having a single extended tongue 57 for selective engagement with the short pins and multiple shorter tongues 58 for engagement with a single extended pin 59.
Patent GB-786534-A (GB)
Title: Improvements relating to rangefinders, and like optical instruments
Inventor: STRANG JOHN MARTIN
IPC: G02B23/02
Filed: 1955-06-30
Abstract: 786,534. Rangefinders. BARR & STROUD, Ltd. May 24, 1956 [June 30, 1955], No. 18913/55. Class 97(1) A coincidence or stereoscopic rangefinder of the self-contained base type utilizing two incoming light beams has in each of the beams a substantially opaque screen having a narrow parallel-sided slot thereon so that when the rangefinder is directed'at the sun to check the infinity adjustment passage of excessive heat to the instrument is prevented and the image of the sun is elongated by diffraction at the edges of the slot. As shown diagrammatically in Fig. 1 the screens 2 are arranged in the incoming beams 4 so that the slots line in the plane of triangulation of the instrument, the slot being so narrow as to produce by diffraction an elongation of the image of the sun as shown at 38 in Fig. 7A which facilitates! testing of the infinity adjustment and minimizes errors in such testing arising from halving errors in the instrument. The screens may be fixed to the windows 3 or pivoted on the outside of the casing to be moved over or away from the windows or pivotally mounted within the casing. The slit may be of variable width being formed of a fixed plate 29 and a plate 30 pressed away from the plate 29 by a spring 31 engaging a fixed rivet 32 but moved towards the plate 29 by a ring 33 rotatable about the axis of the screen and having a cam surface 34 engaging projections 35 on the plate 30.
Patent GB-239673-A (GB)
Title: Improvements in the control of aeroplanes in the direction of flight
IPC: B64C13/00
Filed: 1924-08-09
Abstract: 239,673. Armstrong, W. S. Aug. 9, 1924. No Patent granted (Sealing fee not paid). Balancing; planes, arrangement of.-For balancing an aeroplane in the longitudinal direction the relative position of the upper and lower wings is varied without varying their angle of incidence by acting upon the bracing between front and rear pivoted parallel struts of equal length. A tandem biplane is shown in which the upper and lower pairs of wings 1 are carried at a negative angle of incidence on braced frames 4. Pairs of bracing struts 5 on each side of the machine are connected together at their lower ends and their junctions are provided with vertical slots 18 engaged by pins 6 connected to cables 10 which are passed around guide pulleys 9 carried by the lower frame 8 and attached to drums 12. The drums 12 are mounted on a transverse shaft provided with a hand wheel 14 and with brake drum for preventing the upper frame from surging forward when landing. A single braced vertical member may replace each pair of struts 5 and either arrangement may be inverted. The upper wings may, in a modified arrangement, forwardly overlap the lower wings when the frames 4 are vertical.
Patent GB-675910-A (GB)
Title: Improvements in and relating to seat cushion spring supports
IPC: B60N2/70
Filed: 1950-07-28
Abstract: 675,910. Spring upholstery. BRIGGS MANUFACTURING CO. July 28, 1950. [Aug. 27, 1949] No. 18963/50. Class 52 (iv). Springs 12 are secured to the frame members of seats by clips 20 having parts 22, 24 passed through spaced openings in the frame which receive relatively angularly disposed parts of the spring. The preferred construction utilizes sinuous springs and the pairs of openings 16, 18 are made in channel-sectioned strips 15 secured to the main frame members.
Patent GB-611512-A (GB)
Title: Angular velocity modulated radio system including means for reducing undesired amplitude modulation
IPC: H03C3/04
Filed: 1945-07-24
Abstract: 611,512. Automatic control systems. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. July 24, 1945, No. 18982. Convention date, June 17, 1943. [Class 38 (iv)] [Also in Group XL (c)] Electromotive force.-A signalling system comprises a source of frequency-modulated energy coupled to a cavity resinator, a coupling feeding energy from the resonator, a load impedance coupled into the resonator, and means for varying the load impedance in order to eliminate undesired amplitude modulation. Angular velocity - modulated ultra - high - frequency signals are fed into cavity resonator 10, tuned by a plunger 12, from a source 14 by means of a loop 18. A broad band aerial 20 is coupled into the resonator by means of a line 24 and loop 22. A transmission line 30, tuned to the mid-frequency of the carrier, is connected to line 24 at a point about half a wavelength from the aerial 20, and is terminated by a diode 31, 33. When the amplitude of the energy fed into the resonator 10 exceeds a level determined by the bias voltage applied to diode 31, 33, this diode conducts, the plate resistance of valve 40 controlling the conductivity of a diode 52-53 decreases, thus increasing the load on the resonator presented by diode 52-53 and line 48. Valve 10 may be connected to the cathode 52 of diode 52-53 through a filter network 46 to compensate for non-linearity of the modulation characteristic of diode 52-53 and line 48. The diode 52-53 may be replaced by a grid-controlled gas discharge tube. The Specification as open to inspection under Sect. 91 describes also an absorption amplitude modulation system, in which the load presented to a resonator by a diode varies with the conductivity of a triode valve, controlled by modulating signals applied to the grid. This subject-matter does not appear in the Specification as accepted.
Patent GB-1431051-A (GB)
Title: Storage tube control apparatus for a telephone image transmission system
IPC: H04N7/14
Filed: 1972-04-24
Abstract: 1431051 Television-telephone system RCA CORPORATION 24 April 1973 [24 April 1972] 19022/72 Addition to 1431052 Heading H4F A television-telephone system of the type including a storage tube which is selectively connected between a television camera and a telephone line when transmitting a television video signal to a remote receiver or between the line and a television display when receiving a signal from a remote transmitter, wherein in the transmitting mode a selected frame of the video signal is stored in the storage tube using for example a 60 Hz vertical deflection signal (i.e. the same deflection signal as the camera) and read out from the storage tube for transmission using for example a 15 Hz vertical deflection signal, and in the receiving mode the received video signal is stored in the storage tube using for example a 15 Hz vertical deflection signal and read out from the storage tube for display using for example a 60 Hz vertical deflection signal. Instead of transmitting selected frames of a video signal representative of moving object images a video signal representative of stationary object images may be transmitted, a vertical deflection signal of for example 7¢ Hz being supplied to the television camera; its output video signal being applied directly to the telephone line (i.e. the storage tube is decoupled) and stored at a receiving station in the storage tube using a 7¢ Hz vertical deflection signal. The necessary 60, 15 and 7¢ Hz sawtooth voltage waveforms are provided by a resistance-capacitance time constant network (Fig. 3, not shown) control pulses for which are developed from a synchronizing generator by a logic circuit arrangement (Fig. 2, not shown). The transmitted video signals may be monitored.
Patent GB-733177-A (GB)
Title: Improvements in or relating to methods of manufacturing panel-like structures
Inventor: ALLEN CHARLES WILLIAM GRAINGER
IPC: B64C3/26
Filed: 1952-07-28
Abstract: 733,177. Aircraft framework. BRISTOL AEROPLANE CO., Ltd. July 9, 1953 [July 28, 1952], No. 19026/52. Class 4. [Also in Group XXII] A method of forming an assembly, e.g. an aircraft aerofoil or fuselage comprising a single curvature skin and at least one structural member bonded to a surface of the skin by a thermosetting material is characterized in that a curvature is imparted to the structure member so that when it is unstressed it is curved as finally required on the finished assembly and then bonding the precurved member to the skin while both are held, by applied pressure, in a flat condition or in a more flattened condition than that to which they will conform in the finished assembly. In an embodiment in forming the leading edge of an aircraft wing flap consisting of metal skin material 20 and metal stringers 21, Fig. 7, the "top-hat" section stringers are first produced as shown in Fig. 1 and prior to bonding with the skin material 20 are passed through rolls 23 which impart to the flanges 22 of the stringers the required curvature. The pre-curved stringers are then bonded to the skin which may also be pre-curved, with a synthetic thermosetting resin in a press on a flat platen at a temperature sufficient to cure' the resin and under a pressure of about 100 lb. per sq. inch to the upper surface of the flanges 22. The assembly is then bent to its required curvature by anchoring the edge of the skin and drawing the assembly around spaced wooden formers by spaced bands of fabric. If the precurvature required is such that the elastic limit of the material would be substantially exceeded should the material be entirely flattened during the bending process the skin and the stringers may be bonded on a curved platen. A further embodiment is applied to the manufacture of a wing slat comprising concave and convex metal skin parts 32 and 30 respectively stiffened by stringers 33 and 31 respectively, a metal leading edge part 41, a metal spar 24 and metal rib members 28 and 29, Fig. 9. The skin parts 30 and 32 are produced as previously described except that the stringers 33 are pre-curved as shown in Fig. 3 by rolls 23a, Fig. 5 A channel sectioned operating lever 34 is riveted to the spar 24 and the ribs 28, 29 the twin arms of the lever projecting through slots in the skin which are reinforced by a doubling 42 bonded to the skin. A similar lever 46 is riveted to the ribs 28, 29, near the trailing edge of the slat. Another pair of levers similar to levers 34 and 46 are riveted to the end rib of the slat. The stringers 33 are stopped short of the edge of the slat, Fig. 11, and slots 50 are reinforced by a pre-curved doubling 51 which 'has an extension 52 underlying the joggled end of the stringer. The end of the slat is closed by an end rib 53. The upper part of a trailing edge portion of an aircraft wing flap consisting of a metal skin 60 to which is bonded three chordwise extending metal stiffeners 61, Fig. 13, may also be manufactured by this method.
Patent GB-743246-A (GB)
Title: Improvements in the production of amino acids and derivatives thereof
Inventor: DREWITT JAMES GORDON NAPIER
IPC: C07D201/08
Filed: 1952-07-29
Abstract: A process for the production of esters or lactams of 6-amino-carboxylic acids comprises subjecting a 4-cyano-2-butene-1-carboxylic ester or an alkyl substituted derivative thereof to selective hydrogenation to reduce the double bond and the nitrile group without reducing the ester group.  The hydrogenation may be carried out using an active nickel or cobalt catalyst which may be supported on kieselguhr or pumice, Raney nickel or cobalt, or a platinum, e.g. Adams platinum, or palladium catalyst. The hydrogenation may be carried out in two steps, the double bond and nitrile group being hydrogenated successively. Secondary amine formation is avoided or reduced by carrying out the hydrogenation in the presence of ammonia or a formyl radicle, e.g. in the presence of methyl or ethyl formate, or Adams platinum catalyst in the presence of acetic anhydride.  In the absence of formyl and acetyl radicles a mixture of lactam and ester is usually obtained and in the presence of such radicles the N-formyl or N-acetyl derivative of the amino acid ester is produced.  The lactam, the free amino acid esters, the free amino acids obtained by the hydrolysis of the amino esters or their formyl or acetyl derivatives or the mixture of ester and lactam may be used in the production of polyamides.  In an example caprolactam is obtained by hydrogenation, at elevated temperature and pressure in the presence of Raney nickel moist with ethanol, of 4-cyano-2-butene-1-carboxylic ester obtained by treating ethyl 1,3-butadiene-1-carboxylate with hydrogen cyanide in the presence of aqueous cyanide and washing the crude ester with dilute hydrochloric acid and water.  4 - Cyano - 2 - butene - 1 - carboxylic esters or their alkyl substituted derivatives may be prepared by the addition of hydrogen cyanide to 1,3 - butadiene - 1 - carboxylic esters or their alkyl substituted derivatives, preferably in the presence of a mildly alkaline catalyst, e.g. potassium or sodium cyanide, in aqueous solution, preferably using a polymerization inhibitor, e.g. hydroquinone.  Butadiene - 1 - carboxylic esters may be prepared by hydrolysing 1,3-butadiene-1-nitrile and esterifying the free acid produced, e.g. with methanol or ethanol or by the direct alcoholysis of the nitrile, e.g. with methanol or ethanol in the presence of hydrochloric acid.  Specification 601,142 is referred to.
Patent GB-854052-A (GB)
Title: Improvements in centrifugal distributors for granular fertilizers and like discrete substances
Inventor: WILLIAMS ALAN FOULKES
IPC: A01C17/00
Filed: 1955-12-08
Abstract: The subject-matter of this Specification is identical with that described in Specification 854,051 but the claims differ.
Patent GB-1082723-A (GB)
Title: Improvements relating to function generators
Inventor: PERCIVAL WILLIAM SPENCER
IPC: G06G7/28
Filed: 1963-05-15
Abstract: 1,082,723. Electric analogue calculating. ELECTRIC & MUSICAL INDUSTRIES Ltd. May 15, 1964 [May 15, 1963], No. 19208/63. Heading G4G. A break-point diode function generator comprising a plurality of circuits, e.g. R1, R2, R3 and R4, R5, R6, each associated with a diode, e.g. D1 and D2 has a constant current source T6 connected to its output, the constant current being of such a magnitude as to cause two of the diodes to conduct over a substantial range of input signal levels at T1. With low level input signals, diode D1 conducts passing all the current from T6 and the input/output characteristic follows curve c. At point B diode D2 also becomes conductive, the current from T6 dividing between the two diodes, and curve d is followed. At point C diode D1 ceases to conduct, all the current from T6 now flows through diode D2 and curve e is followed. The addition of the constant current source thus produces two breakpoints B, C instead of a single point. The breakpoint diode circuit may also include the negative feedback circuit, or the alternating bias circuit employed in Specification 1,067,571 or Specification 1,072,921.
Patent GB-1028742-A (GB)
Title: Improvements in or relating to pharmaceutically active anilide
Inventor: FROMMEL EDOUARD
IPC: C07C237/00
Filed: 1963-05-15
Abstract: The invention comprises b -diethylaminobutyric acid N-methylanilide, acid addition salts thereof, and their preparation by reacting crotonic acid N-methylanilide with diethylamine, preferably at elevated temperature and pressure, and, if desired, salifying.  The compounds of the invention may be employed as stimulants for the central nervous system or as psychoanaleptics, and may be used in combination with a pharmaceutically inert carrier in forms suitable for oral or parenteral administration, e.g. as tablets, drag<\>aees or injectable solutions.
Patent GB-1142954-A (GB)
Title: Refrigeration system
Inventor: MOLA CARLOS LARET DE
IPC: F25D13/06
Filed: 1966-05-02
Abstract: 1,142,954. Endless conveyers. FRICK CO. 2 May, 1966, No. 19230/66. Heading B8A. No. 19230/66. Heading B8A. [Also in Division F4] An endless belt conveyer for transporting material in a refrigerated enclosure comprises overlapping links 46 (Fig. 10) having aligned slots 47 through which rods 48 are inserted so that the belt can travel in an arcuate path while in a horizontal plane. As shown in Fig. 1, a wheel 37 is mounted on a vertical shaft 33 at each end of the enclosure and includes vertically spaced sets of annular rims 43 for supporting the belt 45 which passes around and tangentially between the wheels in a multitiered spiral path. Material is supplied to the belt through an inlet opening in wall 21 adjacent one end of the enclosure and is discharged through an opening 27 in the opposite end wall. Beneath opening 27 the belt passes round idler rollers 50 and then passes over a motordriven sprocket and idler rollers (Fig. 7, not shown) mounted between support plates 62. The belt then passes around a wheel 52, which is freely rotatably mounted on shaft 33 beneath wheel 37, and upwardly over idler rollers 53 to the inlet opening. One of the wheels 37 may also be driven, via a chain from the motor driving the belt, either at the same or a faster speed than the belt. A further chain, with tensioning means may be taken from the driven wheel to the other wheel (Fig. 23, not shown) or each wheel may be driven by its own motor (Fig. 24, not shown). The direct belt drive may be omitted and the belt frictionally driven by the wheels. As shown in Fig. 9, the annular ribs 43 are capped by wear strips 44 and a microswitch 5 is provided for stopping the conveyer should the outer edge of the belt rise while travelling round the wheels. Pivoted baffles 145 (Fig. 1) are arranged to operate further micro-switches for stopping the belt when engated by material not properly located thereon. In a modification (Figs. 12-19, not shown) the material is supplied to the lowest run and discharged from the uppermost run of the belt through apertures located in the same end wall of the enclosure.
Patent GB-833863-A (GB)
Title: Improvements in phosphorus-containing insecticides and their preparation
IPC: C07F9/24
Filed: 1958-06-16
Abstract: The invention comprises compounds of formula <FORM:0833863/IV (b)/1> where R1 and R2 represent the same or different C1-4 alkyl radicals, R3 is C1-2 alkyl, cycloalkyl, phenyl or halogen-substituted phenyl, R4 is C1-12 alkyl, C1-4 halogen-substituted alkyl, phenyl or halogen-substituted phenyl and X is oxygen or sulphur.  They may be prepared by reacting a dialkylphosphoric or thiophosphoric acid chloride with an amine R3NH2 to give a dialkyl ester of a substituted phosphoro- or thiophosphoroamidate which is then either reacted with a sulphonyl chloride R4SO2Cl preferably in the presence of an acid-acceptor or reacted with an alkali metal to give the N-alkali metal compound which is reacted with the sulphonyl chloride. Alternatively, R3NH2 may be reacted with R4SO2Cl and the resulting sulphonamide reacted with the dialkyl phosphoric or thiophosphoric acid chloride direct or via the alkali metal derivative.  Inert solvents may be used and temperatures between -10 DEG  C. and the boiling temperature of the solvent, preferably at 0-130 DEG  C.  The intermediates may be isolated; specifically mentioned are methanesulphonic acid isopropyl-, ethyl-, n-propyl-, n-butyl- and cyclohexylamides, N-isopropylaminophosphoric acid dimethyl ester, N-ethylaminothiophosphoric acid diethyl ester, N-methylaminophosphoric acid dimethyl ester, N-n-butylaminothiophosphoric acid diethyl ester and N-p-chlorophenylaminophosphoric acid dimethyl ester.  The products are insecticides (see Group VI).ALSO:Insecticidal compositions comprise compounds of formula <FORM:0833863/VI/1> where R1 and R2 are the same or different alkyl radicals, R3 is C1-2 alkyl, cycloalkyl, phenyl or halogen-substituted phenyl, R4 is C1-12 alkyl, C1-4 halogen-substituted alkyl, phenyl or halogen-substituted phenyl and X is oxygen or sulphur.  Solid or liquid carriers, specifically water, emulsifying or wetting agents may be present.