baber/WOPTO huggingface dataset:
Patent GB-738705-A (GB)
Title: Improvements relating to electric motor control systems
Inventor: BOLTON DENIS
IPC: G05D15/01
Filed: 1953-07-13
Abstract: 738,705. Automatic tension control systems. BRITISH THOMSON-HOUSTON CO., Ltd. June 28, 1954 [July 13, 1953], No. 19361/53. Class 38 (4). In a constant tension control system for a Ward-Leonard strip-coiler drive, both the generator and motor excitation is controlled through magnetic amplifiers, the generator being controlled to maintain constant current and the motor to maintain a constant ratio between motor voltage and strip speed. Provision is made to limit the rise in generator voltage when, for any reason, the mechanical load is removed from the motor. Generator control.-As shown, the generator G has its field FG supplied by a main magnetic amplifier A, which is controlled (i) by a magnetic amplifier Al (having a reversible output) in accordance with the difference between a reference voltage B and the drop across a resistance R in the Ward-Leonard loop, and (ii) by a tachometer generator T responsive to strip speed, in order to relieved the burden on the current-control-amplifier Al and increase its accuracy over the range of mill speed. Motor control.-The motor field Fm is supplied through a main magnetic amplifier A3 controlled by a resistance RH which is operated by a reversible motor M1 energized by a magnetic amplifier A2 in accordance with the difference between the output of the tachometer generator T (strip speed) and the motor B.E.M.F. obtained from a potentiometer R1, R2 plus 1R drop compensation. Voltage limiting.-A magnetic amplifier A4 having a unidirectional output is connected in series with the amplifier A2 and is normally inoperative unless the motor B.E.M.F. exceed the voltage from generator T, when it provides an output to a control winding on the amplifier A to limit the generator excitation. Specification 738,662 is referred to.
Patent GB-602486-A (GB)
Title: Improvements in or relating to means for coupling trailers to towing vehicles
IPC: B60D1/32
Filed: 1945-07-30
Abstract: 602,486. Road-vehicle couplings. STRINGER, H. July 30, 1945, No. 19436. [Class 103 (v)] A road-vehicle coupling comprises a socket member 1 secured to the towing vehicle and formed with a vertical bore 3 in which a cylindrical block 5 is slidable and rotatable. The front end of a connecting rod 7, 13 is pivoted to the block by a pin 8, and the rear end of the rod is secured to a piston 15 movable in a cylinder 11 secured to the trailer, the movement of the piston in either direction being controlled by fluid pressure or spring means. The socket member is formed with vertical and lateral openings 6 and 10 to allow movement of the block and connecting rod, and with a hinged lid 4 retained by a spring clip 4a to prevent disengagement of the block. The height of the block is less than the depth of the bore so that sliding movement is permitted to 'compensate for differences in'level between the towing vehicle and trailer. A pair of couplings may be arranged as illustrated in Fig. 1 (not shown). The cylinders 11 may be positioned below the floor of the trailer. Specification 602,487 is referred to.
Patent GB-131000-A (GB)
Title: Improvements in or relating to Pneumatic Tyres.
Inventor: PIERRE MANDELLI
IPC: B60C19/12
Filed: 1919-08-07
Abstract: 131,000. Mandelli, P. June 14, 1918, [Convention date]. Void [Published under Sect. 91 of the Act] Jackets and covers. -A puncturepreventing device for pneumatic tyres, stated to be especially applicable to aeroplane wheels, consists of overlapping arched plates 3 of spring steel interposed between the air-tube 4 and outer cover 6. The edges 1 of the plates may be flanged to receive retaining wires or cords 2. To protect the air-tube, a leather &c. liner may be fitted under the device.
Patent GB-1000763-A (GB)
Title: Preparation of substituted phenols
Inventor: WRAGG REGINALD TREVOR
IPC: C08K5/375
Filed: 1961-05-31
Abstract: Alkylmercaptophenols or alkylmercaptophenol ethers are produced by reacting a phenol or a phenol ether with an alkyl sulphenyl halide which is formed in the reaction mixture by reacting an alkyl disulphide or alkyl mercaptan with a halogen. The alkyl sulphenyl halide may contain 1-18, preferably 1-12, carbon atoms in the alkyl group.  The reaction is preferably effected under anhydrous conditions with or without a solvent, e.g. carbon tetrachloride.  An excess of phenol or phenol ether is preferably used.  In a typical example, (I) p-hydroxyphenylmethyl sulphide is obtained by chlorinating a mixture of dimethyl disulphide and phenol in carbon tetrachloride at - 10 DEG  to - 20 DEG  C. Other examples describe the preparation of p-hydroxyphenyl butyl sulphide, p-hydroxyphenyl n-dodecyl sulphide, p - hydroxyphenyl - tert. - butyl sulphide and 2-hydroxynaphthyl-1 butyl sulphide. 1-Chloro-2-naphthol is obtained as a by-product in the preparation of 2-hydroxynaphthyl-1 butyl sulphide. Anisol is another specified phenol which may be treated. Reference has been directed by the Comptroller to Specification 875,464.
Patent GB-836055-A (GB)
Title: Improvements in or relating to electric lighting fittings incorporating spotlight reflectors
Inventor: HUBBOLD SYDNEY
IPC: F21V7/04
Filed: 1957-06-21
Abstract: 836,055. Reflectors. GENERAL ELECTRIC CO. Ltd. April 10, 1958 [June 21, 1957], No. 19636/57. Class 97(1) [Also in Group XI] A reflector for reflecting light from an electric lamp into a beam of limited solid angle comprises a first part A of substantially ellipsoidal form continued by a second part B substantially of spherical form centred on the first focus of the ellipsoid and provided with an aperture for the emergence of the beam of light from the reflector. The sides of the aperture in a support member R provide a bearing surface for the spherical part of the reflector permitting an appreciable amount of universal rotation. The reflector may be continued by a skirt C further to reduce the solid angle of the reflected beam. The plane dividing the ellipsoidal part from the part spherical part passes through or near the first focus of the ellipse and the light source is arranged at the same point. The aperture in the part spherical part B is determined by the lines joining the junction of the ellipsoidal and spherical parts to the second focus of the ellipse. The ellipsoidal part may have an aperture or extension D for insertion of an electric lamp L.
Patent GB-259183-A (GB)
Title: Improvements in and relating to apparatus for regulating the working of steam-generating plants, especially for locomotives
IPC: F01B25/00
Filed: 1926-08-09
Abstract: 259,183. Schmidt'sche Heissdampf- Ges. Oct. 3, 1925, [Convention date]. Addition to 231,451. Automatic gear. - Comprises a modification of the apparatus described in the parent Specification for controlling automatically and by a single handle the separate regulators of a number of steam generators working at different pressures. In the construction shown in Fig. 6 an automatic valve 26 is inserted in the pipe 25 leading from the lowpressure regulator 4, the piston 24 of this valve being controlled by a spring 23 and low-pressure steam admitted trouhgh a pipe 28 and a non-return valve 27. When the pressure in the low-pressure boiler is normal the valve 26 is held open against the spring 23, but when the pressure falls the valve partly closes and throttles the delivery of steam through the main pipe 25 until the pressure rises again. The valve 26 may also be held open, when required, as e.g. at starting and on inclines, by admitting high-pressure steam to the underside of the piston 24 through a hand-controlled valve 20 and pipe 29. The regulators 3, 4 are shown as controlled by a single handle 21, but they may be controlled by any of the means described in the parent Specification.
Patent GB-1340709-A (GB)
Title: Process for producing crystalline copolyketone films and  insulated electrical conductors
IPC: B29D7/01
Filed: 1971-06-09
Abstract: 1340709 Copolyketones E I DU PONT DE NEMOURS & CO 9 June 1971 [10 June 1970 (2)] 19672/71 Heading C3R [Also in Divisions B5 and H1] A polymer comprising the recurring unit wherein the moeity is either 1, 4 linked (T) or 1, 3 linked (I) and the T : I mole ratio is 90 : 10 to 50 : 50 is made in examples by condensing tere- and isophthaloyl chlorides with diphenyl ether in solution in distilled HF using BF 3  catalyst. Films of this polymer are good electrical insulators.
Patent GB-147762-A (GB)
Title: Improvements in or relating to calculating machines
IPC: G06C15/00
Filed: 1920-07-08
Abstract: 147,762. Grimme, Natalis, & Co. Dec. 19, 1918, [Convention date]. Adding and subtracting apparatus with printing - mechanism; printing sub-totals.-Relates to machines of the pin-wheel and cam-disk class with multiple bank keyboard setting parts, and consists in arranging printing- means to print either the items or subtotals without zeroizing the totalizing- counter. The keys of each bank determine the differential movement under the tension of a spring c of a rack-bar a, which by means of intermediate pinions b sets the cam-disk upon the pin-wheel d of that denomination. Simultaneously the corresponding figure of the item is set upon a type-wheel n through the agency of a second rack a<1> upon the bar and intermediate, wheels. Upon movement of the driving-handle e for the pin-wheels from the position of rest shown, a, spring bolt f effects automatic lateral displacement to disengaged position of the setting-pinions b, and as the handle is rotated the actuation of the totalizing- counter h by the pinwheels d proceeds. In gear with the numeral wheels of the totalizing-counter is a set of wheels i, bearing lugs i<1>, the position of which varies according to the total standing upon the totalizing-counter. To print a subtotal, this set of wheels is lowered into engagement with a set of pinions k engaging a third rack upon each differential rack-bar a. Upon operating a sub-total key (not shown), the rackbars are released, and move rearwards until the lugs i<1> are arrested by stops k<1>, in which position the sub-total is set upon the type-wheels. Subsequently the wheels i, which during re-setting of the rack-bars to normal become restored to the position representing the sub-total, are re-engaged with the totalizing-counter. Specification 7136/12 is referred to.
Patent GB-148054-A (GB)
Title: Improvements relating to the lap forming apparatus of scutchers and openers
IPC: F16P1/02
Filed: 1919-08-13
Abstract: 148,054. Allen, E., and Hutchinson, R. Aug. 13, 1919. Guards, controlling.-In a scutcher or opener for cotton &c. a guard of the type which is pivoted to the machine frame and is raised as the lap increases in size by a curved arm or lever with which the rack engages, comprises a curved wire mesh or other guard A mounted on a frame consisting of a rod C pivoted to the machine frame, curved levers D, and a cross bar E. The levers D pass through closed vertical slots g in brackets G mounted on the heads of the racks F.
Patent GB-1432246-A (GB)
Title: Toy air gun
IPC: F41B11/643
Filed: 1973-04-26
Abstract: 1432246 Toy guns TOMY KOGYO CO LTD 26 April 1973 [31 May 1972] 19938/73 Heading A6S [Also in Divisions F3 and F4] A toy gun is loaded by pulling rearwardly a cocking slider 26, Fig. 2, mounted externally of its casing 12 so that a rod 40 and bracket 32 are similarly slidden rearwardly against the biass of a spring 36, the bracket being integral with a cylinder 28 having at its front end a nozzle 30 and containing a slidable piston 48 biassed forwards by a spring 54. The rearward movement of the cylinder 28 carries the piston 48 backwards to compress the spring 54 against the end of a support 52 received within the piston. At the limit of rearward travel, a seat 64 on a trigger 18 engages and retains a flange 56 on the piston 48 the cylinder 28 subsequently returning to the initial position shown. As the nozzle 30 moves forwards, it picks up a soft, harmless plastics, &c pellet 72, Fig. 5, from a magazine 20 slotted into the breach of the gun, and carries the pellet into the end 14 of the gun barrel. When the trigger 18 is pulled, the flange 56 and piston 48 are released by the seat 64, so that the spring 54 slides the piston forwards into the cylinder 28, compressing the air in the cylinder to cause it to pass through the nozzle 30 and eject the pellet 72 down the gun barrel 14. The magazine 20 contains a spring-loaded platform 86 onto which pellets 72 are loaded and pushed down, to be retained by a resilient latch 82. The magazine 20 when filled is inserted into the breech of the gun, the latch 82 flexing outwardly over a flange 84 both to hold the magazine to the breech and allow the loaded pellets 72 to be moved upwardly on their spring loaded platform 86, ready to be picked up by the nozzle 30 as it moves forwards into the barrel 14.
Patent GB-280620-A (GB)
Title: Improvements in electric telegraphs
IPC: H04L25/24
Filed: 1926-08-13
Abstract: 280,620. Milnor, J. W., and Western: Union Telegraph Co. Aug. 13, 1926. Restoring or modifying imperfect signals.-Relates to cable telegraph systems in which rapid signals suffer distortion owing to the fact that there is more attenuation of the high than of the low frequency components of the Fourier series into which the signals can be analysed. According to the invention the high and low frequency components are passed to the receiver through separate channels having different amplifying and filtering properties. Thus where the incoming signals from the line 8, Fig. 3, are passed to an output device 4 which may be a relay, receiver or recorder, the D.C. and low frequency components may pass through the channel 5, from which higher frequencies are included by the inductance 28 which the high frequencies pass through the channel 1 containing one or more valve amplifiers, from which the low frequencies are excluded by a condenser 15. The input terminals of the channels 1, 5, may be connected in parallel as shown or in series, and may contain wave-shaping impedance networks. Selenium-cell relays.-The channel 5, Fig. 3, may include a relay of the kind shown in Fig. 4 in which a coil 31 carrying a mirror 32 is controlled by currents received over the line 6. In the absence of signals the beam of light 50 illuminates the selenium cells 34, 35, equally, but on receipt of signals the beam moves and causes current to flow in the outgoing line 7, which forms one diagonal of a Wheatstone bridge. Attenuation equalizers and similar impedance networks.-The wave-shaping network for the lowfrequency components of cable signals may comprise a series inductance 28 and shunt resistance 29, Fig. 3. A wave-shaping device for the higher-frequency channel may comprise an autotransformer 42, Fig. 6, condenser 43, resistance 44, and shunt inductance 49.
Patent GB-850631-A (GB)
Title: Telephone substation including device for pre-setting multiple signal combinations
IPC: H04M1/274
Filed: 1958-06-23
Abstract: 850,631. Impulse transmitters. AUTOPHON A.G. June 23, 1958 [June 27, 1957], No. 20079/58. Addition to 824,469. Class 40 (4). In an impulse transmitter of the type disclosed in the parent Specification, in which impulses are emitted by a magnetic reading- head which scans information carriers bearing recordings of the required impulses, digits are signalled in a code consisting of negative impulses, positive impulses, and gaps, the durations of the impulses and of the gaps each being an integral multiple of a base period, and in which for each digit the total duration of the positive impulses equals that of the negative impulses. The use of such a code enables mutilated signals to be recognized as such at the receiver. Apparatus for producing impulse groups in the preferred code illustrated in the Figure is described in Specification 850,632. As the groups of rectangular impulses shown in the Figure are produced by magnetic scanning the output voltage of the magnetic reading-head is proportional to the rate of change of flux. The flux corresponding to code signals 15-18 is shown at 15a-18a and it will be seen that code signals 17 and 18, each of which includes groups of two successive impulses of the same sign, require a maximum flux of twice the value of the other code signals. Consequently the use of these two signals is not contemplated, the preferred code consisting of the signals 1-16 only.
Patent GB-1123867-A (GB)
Title: Improvements in rotary impeller pumps
Inventor: DEE WILLIAM COLIN
IPC: F04D13/06
Filed: 1966-05-06
Abstract: 1,123,867. Electric motors. G. C. DAVIS 24 May, 1967, [6 May, 1966],. No. 20101/66. Heading H2A. [Also in Divisions F1 and F2] In a pump for liquids and gases a tube 11 having internal impeller blades 19 may be of steel and form the rotor of an electric motor. Alternatively, it may carry the rotor which may be of the squirrel-cage type and comprise an annulus 12 with metal inserts 12a. Pressurized fluid, e.g. air or the fluid being pumped, is. supplied via passages 8, annular channels 7 and angularly-spaced holes 9 to fluid bearing gaps 10 and thence to fluid thrust bearing gaps 16 which open into the pumped fluid flow. Resilient annular members 22 or resilient blades (not shown) projecting axially from annular members, overlie the gaps 16 to form non-return valves thereat to prevent pumped fluid from entering the gaps 16. Alternatively, the non-return valves may be formed by members carried to their closed positions by pumped fluid trying to enter the gaps 16. The stator thrust faces at the gaps 16 may be provided by rings 15 or radial end faces of pipe sections 1, 2. The rotor thrust faces may be provided by the steps on a stepped impeller tube.
Patent GB-995393-A (GB)
Title: Folding hoods for road vehicles
Inventor: PERKS JOSEPH
IPC: B60J7/12
Filed: 1963-05-21
Abstract: 995,393. Vehicle hoods. WEATHERSHIELDS Ltd. May 21, 1964 [May 21, 1963], No. 20108/63. Heading B7B. The lower ends of the main hoopstick 11 are slotted at 16 to engage pins 17 fixed to the hood mounting brackets 12. A toggle lever 20 pivoted on the pin 17 acts on the link 21 to raise the hoopstick 11 to tighten the hood fabric. During such movement projections 19 on the hoopstick 11 engage lugs 18 on the mounting brackets 12 to lock the hood in its erected position. Specification 836,677 is referred to.
Patent GB-715896-A (GB)
Title: Production of acetoacetic acid amides
Inventor: LACEY RICHARD NORMAN
Filed: 1951-08-27
Abstract: An acetoacetic acid amide is obtained from a "normally unreactive" primary or secondary aromatic amine by reacting it with diketene in the presence of a tertiary amine or a salt of such an amine with a weak acid.  The "normally unreactive" primary or secondary aromatic amines are defined as those having dissociations constants smaller than 9 X 10-11.  Suitable amines as starting materials are, for example, para-nitroaniline, meta- and parachloroaniline, meta, para- and ortho-aminobenzoic acid methyl esters, benzidine, ortho-, meta- and para-amino-acetophenones and esters of amino-benzene sulphonic acids.  The tertiary amine catalyst may be, for example, trimethylamine, triethylamine, tripropylamine, p  tri-isopropylamine, tributylamine, triethanolamine, picoline or a salt thereof with a weak acid.  Only small amounts of the catalyst are required. Suitable temperatures for the reaction are from room temperature to about 100 DEG  C.  In the examples diketene is reacted with (a) methyl anthranilate in the presence of triethylamine to give methyl N-aceto acetylanthranilate; (b) m-nitro-p-toluidine in the presence of triethylamine to give N-acetoacetyl-nitro-p-toluidines; (c) o-chloroaniline in the presence of trimethylamine to give N-acetoacetyl-o-chloroaniline; (d) o-nitroaniline in the presence of triethylamine to give N-aceto acetyl-o-nitroaniline; and (e) with diphenylamine in the presence of triethylamine to give N,N-diphenylacetoacetamide.  In some cases the diketene used contains some free acetic acid so that the tertiary amine catalyst is present in the form of its salt.
Patent GB-1108212-A (GB)
Title: Wrapping apparatus
Inventor: STURTIVANT JOHN THOMAS
IPC: B65B9/02
Filed: 1966-05-06
Abstract: 1,108,212. Wrapping-machines. LERNER MACHINE CO. Ltd. 20 April, 1967 [6 May. 1966]. No. 20264/66. Heading B8C. In wrapping apparatus of the kind in which an article to be wrapped is pushed into a curtain formed by webs above and below its path, the webs being joined by heat sealing jaws in front of the article, in the process of completing the wrap around a previous article, the jaws also severing the webs behind the previous article, air blast nozzles are provided to billow the curtain in front of the article and cool the weld. In one form, a cranked duct 30 supplies air through nozzles 17, 18 and a further duct 31 assists in releasing the web from the lower sealing jaw 11 as well as cooling the weld. In another embodiment, Figs. 1, 2 (not shown), separate ducts, adjustable in position on either side of the article path, replace the duct 30, the duct 31 being optional.
Patent GB-733586-A (GB)
Title: Facsimile recorder
IPC: H04N1/16
Filed: 1953-07-22
Abstract: 733,586. Copying-telegraphy. FAXIMILE, Inc. July 22, 1953 [Aug. 8, 1952], No. 20334/53. Class 40 (3). A facsimile recorder comprises a rotatable electrode contacted by a flexible vibratable linear electrode movable in the direction of its length, and resilient means distributed along and engaging a portion of the linear electrode is arranged so that the mass of the linear electrode vibratable by the rotatable electrode is less than the mass of said portion. The rotating electrode is a helical rib 26 on a drum 25 mounted on a shaft 25 carrying a gear wheel 74 driven from a motor 67 by a gear train 70, 71, 73. The linear electrode is a blade 10 formed by part of a loop mounted on pulleys 11, 12, the latter being driven by gear 79 meshing with a gear 78 driven by a worm and worm wheel from the motor 67. A U-shaped frame 35 having a base 36 and side arms 37, 38 carries spring arms 39, 40 . . . with headed pins 45 engaging the lower edge 46 of the blade 10 under the action of springs 47, 48 attached to the base 36 and to the sides of the cabinet 13. Two triangular members 53, 54 fixed in the cabinet 13, overlie the members 37, 38 and have headed pins 59 engaging. the edge 28 of the blade 10 which at its lower end 46 engages the stepped end 61 of the members 37, 38 provided with longitudinal slots 63 engaging screws 62 fixed in the members 53, 54. A comb member 64 attached to a fixed bar 66 carries fingers 65 formed with dimples 65<SP>1</SP> bearing on the blade 10 near its marking edge 28. When the blade 10 is not contacted by the electrode 26 it engages the top inclined surface of a support plate 86. In a modification, Fig. 9 (not shown), a member extending to the edge 28 of the blade 10 is curved and carries a pad of felt which cleans the operative edge of the blade. In further modifications, Figs. 7, 8 (not shown), the blade is held relatively rigid over a limited length by passing between driving and guiding rollers, and the looped portions at the ends engage friction surfaces to ensure a steady motion of the blade.