baber/WOPTO huggingface dataset:
Patent GB-644044-A (GB)
Title: Improvements in or relating to noise-suppression circuits for frequency-modulation receivers
IPC: H03G3/28
Filed: 1947-07-15
Abstract: 644,044. Automatic noise suppression. PHILIPS LAMPS, Ltd. July 15, 1947, No. 18843. Convention date, July 17, 1946. [Class 40 (v)] A frequency modulation receiver in which slight or no automatic volume control is applied to stages preceding the peak limiter, comprises a thermionic tube situated between the highfrequency input and low-frequency stages, which is blocked when the received signal is below a predetermined amplitude by a voltage equal to the difference between a constant voltage and the rectified output of the limiter. The invention enables the receiver to be muted during no-signal periods without introducing distortion during the reception of signals. Fig. 1 shows part of a frequency-modulation receiver in which the output from peak limiter 1 is fed to frequency discriminator 3, 4, which supplies the low-frequency amplifier 8. A bias source 7 is used to bias diodes 3 and 4 so that these are non-conducting for signals below a predetermined level, but this bias is opposed by the voltage developed across resistance 13 by rectifier 15 which is also fed with signals from limiter 1. The arrangement is such that the receiver is muted during periods of no signal when only noise is present, but when signals above a predetermined amplitude appear the operating threshold level is reduced, thereby reducing distortion. An alternative arrangement is shown in Fig. 2, in which the control grid of a peak limiter 21 is negatively biassed by means of a source 25 connected in series with a resistance 24 which is also fed with an opposing bias derived from rectifier 23 which is fed from the output of the limiter 21. In a modification, the source 25 is replaced by the voltage developed across the resistance in the cathode circuit of an intermediate frequency amplifier (Fig. 3, not shown). In a further modification, the rectified voltage from one of the diodes in the frequency discriminator is used as the varying opposition bias to reduce the effect of the constant voltage bias (Fig. 3a, not shown). Specification 613,952 is referred to.
Patent GB-530659-A (GB)
Title: Improvements in or relating to periodical absorption refrigerating plants
IPC: F25B17/00
Filed: 1939-06-28
Abstract: 530,659. Refrigerating. STEENSEN, S. J. June 28, 1939, No. 18881. [Class 29] Absorption systems.-In a reversing system comprising an evaporator 2, refrigerant reservoir 7, condenser 4 and generator-absorber K, valve apparatus 13 inserted between the reservoir and the condenser is adapted to pass condensate in repeated small quantities during the boiling period to the reservoir 7, whilst during the evaporation period the valve opens under the pressure in the evaporator to permit vapour to return to the generator-absorber. The valve comprises a float 16 fitting with a small clearance in a cylinder 13 and carrying a needle valve 19, the weight of the float being supported by a spring 18. Weights 22 in a bore 23 serve to balance the float. During the generating period the valve 19 engages its seat, the pressure in the condenser 4 and pipe 3 increases, the condensed vapour passes into the space 21 between the cylinder 13 and the float, thus lifting the float to open the valve. When a small quantity of condensate has been thus delivered to the reservoir the valve closes, and this action is repeated during the generating period.
Patent GB-1032880-A (GB)
Title: Novel benzamide derivatives and a process for the manufacture thereof
IPC: C07C233/12
Filed: 1965-05-05
Abstract: The invention comprises compounds of formula <FORM:1032880/C2/1> wherein R1, R4 and R5 are C1- 7\t alkyl groups, and one of R2 and R3 is a hydrogen atom and the other is a C1- 7 alkyl group, and derivatives thereof wherein the nitrogen atom carrying the R1 substituent also carries a benzyl radical, and acid addition salts thereof, and the preparation of compounds (I) by (a) debenzylation of the N-benzyl derivatives by catalytic hydrogenolysis, (b) reaction of an appropriate halo-compound with an amine R1NH, (c) reduction of a compound containing the group R6CONR1-wherein R6 is a hydrogen atom or a C1- 7 alkyl, C1- 7 alkoxy or C1- 7 carboxyalkyl group, or, to prepare the N-benzyl compounds, (d) reacting a substituted-p-N-benzyl aminoethoxybenzylamine with a substituted benzoyl halide or (e) reacting a substituted N-p-hydroxybenzyl benzamide with a substituted b -N-benzylamino-ethyl halide.  Compounds of formula <FORM:1032880/C2/2> are prepared by oxidation of a m-OR5-p-OR4-benzaldehyde or by etherification -of m,p-dihydroxybenzoic acid to form a m-OR5-p-OR4-benzoic acid, converting this to its acid halide, reacting this with p-hydroxybenzylamine to give a N - p - hydroxybenzyl - m - OR4 - p - OR5 benzamide, and reacting this with a compound of formula R6CONR1CHR2CHR3Hal, wherein Hal is a halogen atom.  Compounds of formula <FORM:1032880/C2/3> wherein Z is a halogen atom are prepared by reaction of an N-p-hydroxybenzyl-m-OR4-p-OR5-benzamide with (a) an ethylene or substituted ethylene dihalide or (b) a compound of formula Z-CHR2CHR3X where X is a p-toluenesulphonyloxy group. Compounds of formula PhCH2NR1CHR2CHR3Hal wherein Ph is a phenyl group and Hal is a halogen atom are prepared by (a) N-alkylation of an N-benzyl-aminoalcohol, (b) reaction of a compound of formula PhCH2NHR1 with an alkylene oxide, or (c) reaction of benzaldehyde with an aminoalcohol under reducing conditions to give a compound of formula PhCH2NR1CHR2CHR3OH, and treating this with thionyl chloride. Compounds of formula <FORM:1032880/C2/4> are prepared by reaction of an N-benzyl-b -haloalkylamine with p - hydroxy - benzaldehyde to form a p-b -N-benzylaminoalkoxybenzaldehyde, and reacting this with ammonia under reducing conditions.  m - Propoxy - p - methoxy - benzaldehyde is prepared by m-alkylation with propyl bromide.  The compounds (I) have anti-emetic activity and may be used in pharmaceutical compositions in combination with a carrier, for example in forms suitable for oral, parenteral or rectal administration.
Patent GB-449366-A (GB)
Title: Improvements in or relating to machines for feeding sheets of paper, card or the like
IPC: B65H9/16
Filed: 1935-07-02
Abstract: 449,366. Feeding sheets. BACKHOUSE, H. T., 12, Melina Court, St. John's Wood, London July 2, 1935,No. 18941. [Class 100 (i)]. In connection with a sheet-feeding device of the kind in which the foremost sheet is released from the action of a feed-in roller or rollers 4 when it reaches a predetermined position, for example the front lays of a printing- machine, and is controlled by balls 10 protruding from a cage 9, variation in the pressure of the balls on the sheet can be effected without substitution of the cage. The balls are graded in weight and held in position by pins 11. The cage 9 and roller 4 co-operate with a feed belt 2 passing over a feed table 3, and the roller 4 and cage 9 are carried by a bracket 5 formed in two parts pivoted at 8 and adjustable along a frame bar 6 to which it is connected by a screw 7 engaging a keyway. Normally the action of the sheet on the wheel 4 keeps the bottom of the cage 9 out of contact with the sheet, but when the sheet passes the roller 4 the cage drops so that the sheet is under the control of the balls 10. The bracket 5 can be adjusted so that one, two, or three balls act on the sheet when it is released from the action of the roller 4. In a modification the sheet may be controlled by one ball only of a series of balls of different weight arranged in a cage which is adjustable about a vertical or horizontal axis. The invention may be applied to overlapping stream feeds.
Patent GB-1427489-A (GB)
Title: Image display cell
IPC: G02F1/1503
Filed: 1974-05-01
Abstract: 1427489 Dipyridyl derivatives PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 1 May 1974 [4 May 1973] 19066/74 Heading C2C [Also in Divisions H3-H5] Compounds of the Formula A where R 1  and R 2  are ethyl or propyl, n is 4, m is 2 or 3 and X is a mono-anion such as chlorate or tetrafluoroborate, are prepared by reacting the compound B with compound C  or compound D in a polar aprotic solvent between room temperature and the boiling point of the reaction mixture. Compound C is prepared from the N- alkyldipyridyl bromide and 1,4-dibromobutane, and reacts with bipyridyl to give compound B. The latter gives compound D on reaction with 1,4-dibromobutane. Suitable solvents for the above reactions are dimethylformamide, acetonitrile, sulfolane, dimethylsulphoxide and propylenecarbonate.
Patent GB-992392-A (GB)
Title: Electrolytic cavity sinking apparatus and method
IPC: B23H3/00
Filed: 1961-05-29
Abstract: In electrolytic cavity sinking apparatus, wherein electrolyte flows through a hollow cathodic electrode which is advanced towards and into an anodic workpiece, means for damping oscillations in the electrolyte are provided thereby inhibiting lateral vibration of the electrode so as to prevent short circuiting of the electrode against the workpiece.  In all the embodiments, the inhibiting means act to prevent the column of liquid in the electrode from oscillating at a regular frequency. Fig. 1 shows an electrode 20 with an electrode mount 26 sealed against a workpiece W by an insulating bushing 28. The bushing seals against the surface and the electrode and mount are advanced slidingly through it.  Electrolyte is supplied at 36, flows through a passage between the electrode's outer surface and a bore 40 in the bushing, through a bore formed in the workpiece, over the tip 22 of the electrode and thence axially of the hollow electrode to escape through a hole 50 in the electrode mount.  The passage of electrolyte around the outside of the electrode has a cushioning effect on it which inhibits vibration. A similar cushioning effect is provided in a similar embodiment, Fig. 3, in which the electrolyte flow is first through the electrode and then along its outer surface. As shown in Fig. 4, electrolyte supplied at 36 passes through a small hole 92 in a plug 90 so as to dampen oscillation. <PICT:0992392/C6-C7/1> <PICT:0992392/C6-C7/2> <PICT:0992392/C6-C7/3> <PICT:0992392/C6-C7/4> In a further embodiment, Fig. 5 (not shown), a small hole is provided through the hollow electrode immediately behind its tip and this is said to introduce a dissymmetry which prevents oscillation.  Fig. 7 (not shown) illustrates an electrode 98 which, instead of having a single slot exit, has closely spaced exit holes 100 which are said to prevent oscillation. Electrodes insulated at their outer surface, e.g. with acrylic resin or polytetrafluoroethylene, e.g. Fig. 1, and at both their inner and outer surfaces, Fig. 4, are shown.  Fig. 2 shows a back up member 52 which receives a slug of material 60 produced as a result of boring right through a workpiece W.  Specifications 943,101, 944,613 and 991,607 are referred to.
Patent GB-1140258-A (GB)
Title: Method of forming a cup-shaped container
IPC: B21D22/20
Filed: 1966-05-02
Abstract: 1,140,258. Making cans. AMERICAN CAN CO. 2 May, 1966 [4 May, 1965], No. 19297/66. Headings B3A and B3Q. A method of forming a cup-shaped container of low-ductility metal, e.g. steel, comprises coating a flat blank with a higher-ductility metal at least on the surface which is to form the outside of the container, deep drawing the blank to form a cup (Fig. 3) having a bottom wall (42) and a cylindrical side wall (40) of substantially equal thickness and subjecting the cup to at least one ironing step for thinning and elongating the side wall. Both sides of the blank are preferably coated, electrolytically, with tin, copper, zinc, brass, nickel, silver, lead or cadmium, and the blank deep drawn and ironed in the matt condition, i.e. without the coating having previously been melted and flow-brightened. In this condition lubricating oil impregnates the matt surfaces and facilitates the drawing and ironing operations. The blank is centred over a drawing die 14 by a recess 34 in a spring-pressed hold-down 24. A punch 20 with a conical, spheroidal, flat &c. end 22 draws the blank through the die 14 to form a cup (Fig. 3), which may be transferred to another press having one or more ironing dies or, as shown, two or more ironing dies 44, 48 may be disposed beneath the drawing die for producing the container in a single operation. The ironing dies burnish and reduce the thickness of the cup-wall, but the end of the container has substantially the same thickness as the starting blank. Spring-pressed strippers 60 remove the container from the punch.
Patent GB-849859-A (GB)
Title: Improvements in or relating to fastening means for the securing of small components
Inventor: MARTIN NEIL
IPC: F16B2/24
Filed: 1958-06-17
Abstract: 849,859. Strap fastenings. PLESSEY CO. Ltd. June 16, 1959 [June 17, 1958], No. 19309/58. Classes 44 and 109. Small electronic com ponents are held on a panel or base-board by a strap of resilient shee material, preferably rub ber or transparent plastic the ends a, b of which are shaped as arrowheads for ease of insertion througl holes in the base-board, and after insertion the points a, b may be cut to leave shoulders m retaining the strap through the holes. The strap may be perforated for the passage of wires &c.
Patent GB-835528-A (GB)
Title: Improvements in or relating to dust moistening apparatus
Inventor: MUEGGE DIETRICH
IPC: B01D47/06
Filed: 1958-06-17
Abstract: 835,528. Dust-moistening apparatus. MASCHINENFABRIK BETH A.G. June 17, 1958, No. 19384/58. Class 55 (2). As shown in Fig. 1, an apparatus for moistening industrial dusts, particularly blast-furnace dust, comprises a fixed drum a having supply pipe b and outlet pipe c over which is arranged water tube i having nozzles which spray the dust passing through the drum. The dust is propelled through the drum by means of conveyer blades k (see Fig. 2) attached to rotating shaft f, and mixed with the spray by means of mixing blades I which are displaced by 90 degrees but are adjacent to and alternate with each conveyer blade. The conveyer blades are planiform and are mounted obliquely to the axis of the shaft, but the mixer blades (see Fig. 4) have a bent rim g and are provided at the back with a stiffening plate h. The mixer blades are mounted as shown in Fig. 1 so that the part attached to the shaft forms an acute angle towards the inlet end b of the drum.
Patent GB-354498-A (GB)
Title: Improvements in or relating to centreless grinders
IPC: B24B5/24
Filed: 1931-06-26
Abstract: 354,498. Centreless grinding. WHITE, A. E., 5, Quality Court, Chancery Lane, London.-(Stock & Co., Spiralbohrer- Werkzeug-und Maschinenfabrik Akt.-Ges., R. ; Marienfelde, Berlin.) June 26, 1930, No. 19431. [Class 60.] A centreless grinding machine, particularly for grinding conical rollers has a cylindrical grinding- wheel and an opposed regulating wheel d, and the latter is moved together with the work rest b in the direction f of the line of grinding contact, the grinding wheel axis m being inclined so that the work is held constantly against an abutment l on the work rest during operation. The regulating wheel and the work support are mounted on a slide g which moves on guides h and the regulating wheel is set according to the conicity of the work by means of bolts q passing through arcuate slots p. The regulating wheel is preferably made of metal. The transverse axis n about which the grinding wheel is tilted is preferably located near the front face of the wheel so that the grinding throat may be adjusted so that it enlarges gradually towards the entering end and the work is engaged gradually with the grinding disc. In operation, the work c is placed in position against the abutment i and the slide g is traversed from the position shown in Fig. 5 to the position shown in Fig. 4. The slide g is then returned and a fresh piece-of work placed in position. If desired the work may be ground during the return stroke, the inclination of the.grinding disc being in this case automatically reversed.
Patent GB-1132684-A (GB)
Title: Draw-off device for a vacuum cooker for boiling a sugar composition
IPC: C13B25/02
Filed: 1967-04-27
Abstract: 1,132,684. Vacuum evaporators; boiled sugar confectionery. HAMAC-HANSELLA G.m.b.H. 27 April, 1967 [12 May, 1966], No. 19455/67. Heading BIB. Water is boiled off from sugar compositions in vacuum vessel 12, and thick layers of the boiled liquid product are carried through gaps 3 formed by the lower inner walls of the vessel and horizontal, rotating rollers 1 which are heated, preferably to the boiling temperature of the composition, and are rotated in the direction of draw-off. The product is discharged through aperture 5 onto conveyer band 9. The arrangement is such that air cannot enter aperture 5. The cover 6 is only closed when the apparatus is started up. Heating fluid is introduced into rollers I through hollow shafts. The drawoff part of the vessel has hollow walls 14 through which heating fluid can be conducted. Essences and colourants may be injected through nozzles (not shown) into the draw-off space 7. In a modified apparatus, the rollers 1 do not touch, and the product is drawn off through the gap between them. Another apparatus is described wherein there is only one roller.
Patent GB-979704-A (GB)
Title: Improvements in or relating to hydraulic dynamometers or brakes
Inventor: EVANS GODFREY ARTHUR
IPC: G01L3/20
Filed: 1960-06-01
Abstract: 979,704. Hydraulic rotary absorption dynamometer. HEENAN & FROUDE Ltd. May 31, 1961 [June 1, 1960], No. 19465/60. Heading G1W. A dynamometer 1, particularly for testing brake-horsepower of an aero engine to which it is coupled, has a water inlet control 5 (coupled to the engine throttle) and an outlet 2 the back pressure on which is variable, so as to vary the braking torque, by movement of a valve member 8 carried on a spindle 9. The latter is formed with a piston, 11, sliding in a cylinder 10. Oil is supplied on one side of the piston, through a pipe 39 from a constant speed pump 37 driven independently by an electric motor 80, at a fixed "reference pressure", and on the other side through a pipe 32 from a pump 30 driven by the dynamometer. Thus, movement of the piston, and hence valve member 8, towards the left, will only occur for high engine speeds giving sufficient pressure in pump 30 to overcome the reference pressure. Once this speed has been reached, movement of the valve member 8 causes large increases of back pressure in the outlet 2 for small speed increments, as indicated by the curve ofe in Fig. 36 showing the brake horsepower developed as a function of engine speed. The characteristic of the dynamometer is adjusted by means of coarse and fine needle valves, 40 and 41, arranged in parallel in pipe 34 which communicates, via cylinder 10, with pipe 32, and a needle valve 51 in the reference pressure circuit. These valves may be remotely controlled by means of motors 42, 43, 52. Relief valves are indicated by 48 and 57. Oil for the pumps is obtained from a steadytemperature tank 29. This is positioned to supply a low-pressure fluid head directly to a fluid dashpot 104 for a piston 100 of the spindle 9. Bellows 12 on spindle 9 prevent oil leakage. To simulate different flight conditions, when a variable pitch propeller is to be used, the "coarse pitch" and "fine pitch" oil outlets of the hydraulic propeller control unit of the engine are connected, respectively, to cylinders 27 and 27a of a differentialpressure ram unit 22 (see Figs. 1 and 2) coupled via a lever 18 to the spindle 9. Movement of the valve member 8 will thus be influenced additionally by adjustment of the propeller control unit, or only by the latter if the needle valves 40, 41 and 51 are adjusted to "zero" resistance.
Patent GB-435583-A (GB)
Title: Improvements in and connected with trousers and like presses
IPC: A47G25/72
Filed: 1934-07-03
Abstract: 435,583. Trouser presses. EVERITT, R. W., 17, Lever Street, London. July 3, 1934, No. 19534. [Class 141] In a trouser or like press, the top board is carried by a substantially square U-shaped frame, embracing both top and bottom boards of the press, and to the two parallel side rods d of which are connected the ends of transverse bars c fitted to the top board a, the yoke d<2> of the frame being arranged to swing in bearings e provided on the back of the bottom board f near one end. At the end opposite to the hinge, a member g is pivotally carried by a frame h hinged to the bottom board, and normally urged in the direction of the top board by springs i. When the press is being closed on a pair of trousers placed hanging over the member g, the cuffs thereof are first gripped near the hinge, and the top board, in closing, causes the member g to swing outwards and upwards, so stretching the trousers. When the press is closed, it is fastened by levers j, connected by links j<2> to a resilient member l on the back of the bottom board, and which engage the ends of one of the transverse metal bars c. The connection between the side rods d and the bars c is preferably made by additional metal strips curled round the rods. The press is provided with a pair of legs m adapted to open out and to fold flat against the bottom board.
Patent GB-147607-A (GB)
Title: Improvements in and relating to controlling and safety devices for high pressure water supply systems
IPC: F03B15/18
Filed: 1920-07-08
Abstract: 147,607. Samain, P. April 14, 1919, [Convention date]. Sluice gates.-High-pressure water-supply systems for turbines are provided with means for shutting off the supply and allowing air to enter the supply pipe when the latter bursts. When the water level in the supply reservoir 8 falls rapidly, in consequence of a burst in the supply pipe 12, a float 1, the weight of which is partially balanced by springs 4, descends on to a seat 16 and air enters the pipe through a central duct in the float. The float 1 may also be used for regulating the outlet from the reservoir by means of electro-magnets 11, 14 operating water inlet and outlet valves 10, 13. The pipe 12 is provided at intervals with gravity or spring-controlled valves 20 to allow the entrance of air on the occurrence of a vacuum in the pipe.
Patent GB-778062-A (GB)
Title: Hydrazine derivatives of 2-alkylpyridine-4-carboxylic acids
IPC: C07D213/86
Filed: 1953-07-14
Abstract: The invention comprises hydrazine and hydrazone derivatives of 2-alkylpyridine-4-carboxylic acids, in which the 2-alkyl group may be a straight or branched chain of 1-18 C atoms, and the hydrazine residue may contain hydrogen or organic aldehyde or ketone groups optionally substituted by hydroxy radicals.  The 2-methyl-4-carboxylic hydrazide is excluded.  The products are obtained by the action of esters or halides of the alkyl pyridine carboxylic acid with hydrazine or compounds yielding hydrazine, to give hydrazides, or the action of hydrazides of the alkylpyridine carboxylic acid on a carbonyl compound, or on compounds reacting like carbonyl compounds such as acetals, or bisulphite compounds.  In examples, the benzal and 41-hydroxybenzal-4-carboxylic hydrazones of 2-methylpyridine are prepared by the action of benzaldehyde and p-hydroxy-benzaldehyde on the hydrazide (obtainable by reacting 2 - methylpyridine - 4 - carboxylic acid ethyl ester with hydrazine hydrate); the hydrazides of 2-ethylpyridine-4-carboxylic acid, and 2 - isopropylpyridine - 4 - carboxylic acid, are obtained by the action of hydrazine on the corresponding ethyl esters; the corresponding 2 -, -butyl, 2 - n - butyl, 2 - amyl, 2 - isoamyl, and 2- undecyl-derivatives are prepared similarly; the 2-isopropyl hydrazide gives benzal-and p-hydroxybenzal hydrazones by the action of the appropriate aldehydes.