baber/WOPTO huggingface dataset:
Patent GB-1525561-A (GB)
Title: Magnetic recording apparatus and method
IPC: H03G5/16
Filed: 1975-10-02
Abstract: 1525561 Signal compressors EMI Ltd 2 Oct 1975 [5 July 1974] 29817/74 Heading H4R In a method of duplicating recorded magnetic tapes in which a master tape is replayed at a higher speed than recorded and duplicated on tapes which are proportionately speeded up relative their ultimate replay speed, the master tape is recorded after passing the signal through a circuit which limits the amplitude of a selected band of frequencies above 4 kHz to a level which is below that which, during the final recording, will cause saturation of the magnetic material on the duplicate tapes. As described the signal to be recorded on the master tape is passed through the apparatus of Fig. 1 in which the input signal at 1 is passed through a filter 10 having an m-type section 11 and a k-type section 12 to give a response which falls at 24 dB/octave above 14 kHz. The resulting signal is split into frequency bands centred at 51 Hz, 2 kHz, 4 kHz, 8 kHz and 16 kHz, by filters 21 to 24, the lower filters 24 having a fixed loss in the pass band, while the higher filters have a variable loss dependent on the signal level. The outputs of the filters are combined at the low impedance input of adder 30 before appropriate amplification and recording. In the control circuits the combined signal from the adder 30 is passed through an equalizer amplifier 44, which has a characteristic rising at 6 dB/octave above 5 kHz, to selective filters (411, 421, 431) Fig. 2 (not shown) having centre frequencies corresponding to those of the filters 21 to 23. The filter output pass through flat amplifiers (412, 422, 432) to rectifiers (413, 423, 433) to provide control signals which increase with the signal amplitude in the respective channels, and through differentiating amplifiers (414, 424, 434) to rectifiers (416, 426, 436) to provide control signals which depend on the rate of change of signal in the respective channels. The control signals in each channel are combined to provide a single control signal for each channel which is applied to a respective Zener diode network (415, 425, 435) to provide an adjustable gain control impedance in the respective filter.
Patent GB-788937-A (GB)
Title: Improvements in or relating to machines for applying fastening hooks to the ends of conveyor belts, driving belts, and the like
Inventor: THORNDYCRAFT DOUGLAS JOHN
IPC: F16G3/00
Filed: 1954-10-18
Abstract: 788,937. Belt fastening appliances. BELTFASTENERS, Ltd. Dec. 7, 1954 [Oct. 18, 1954], No. 29994/54. Class 80 (1). In a device for securing wire hook fasteners into the end of a belt of the type described in Specifications 776,811 and 776,812, in which clenching jaws carried by a pair of relatively pivotal levers 13, 14 are actuated to close on opposite sides of the belt by mechanism such as bellcrank levers 25, 26 and a screw 34, stop means are provided to limit the closure of the jaws in accordance with the thickness of the belt. Such stop means comprise a pin 39 on a plate 41, the plate passing over a rod 17 forming a support for the device and the pin 39 entering the end of a slot 30 in a guide-plate 31 of the clenching head so as to engage the pivot pin 29 of the bell-cranks 25, 26 which moves in said slot. The plate 41 may have a single pin 39 as in Fig. 5 or it may have several pins 39, 391, 39<SP>11</SP> as in Fig. 6 for different thicknesses of belt. The stop-pin 39 or 39<SP>1</SP>, 39<SP>11</SP> could be replaced by a rotatable eccentric pin to provide a greater range of adjustment.
Patent GB-946712-A (GB)
Title: Improved process and device for treating steel with oxygen
Inventor: FORESI MARIO
IPC: C21C5/04
Filed: 1961-08-21
Abstract: <PICT:0946712/C3/1> A process for refining steel in open hearth furnaces comprises blowing oxygen on to the melt through a lance having oblique downwardly directed nozzles whose axes neither intersect nor are parallel to the axis of the lance.  More than one lance may be used, the oxygen output being varied independently in each, and steam or other heated gases, or substances to be added to the melt may pass through the lance.  As shown, the lance may be provided with a water-jacket and an inner tube 13 conveying oxygen to a head through which pass conduits 17 and 18, the arrows 27, 27I and 27II indicating the forces acting on the bath at the point of contact of the jets issuing from the oblique nozzles 17 and the arrows 28, 28I the forces from the nozzles 18 which are less oblique than the nozzles 17 and may be normal to the bath surface. The lance is stated to give a radial and rotary movement to the metal or slag at the surface of the bath.
Patent GB-1358294-A (GB)
Title: Varactor ciodes
IPC: H01L29/93
Filed: 1971-06-28
Abstract: 1358294 Semi-conductor devices SIEMENS AG 28 June 1971 [13 July 1970] 30103/71 Heading H1K A hypersensitive P-N junction varactor diode having a monotonic C-V characteristic and being capable of accurate reproduction in batch manufacture is made by diffusing into an N-type body (initial doping conc. N B ) further N-type impurities in such a way that part of the diffused doping profile approximates realistically to an exponential function, and then diffusing in a high concentration of P-type impurities so that a P-N junction is formed at a depth at which the N-type doping concentration is No, where N B /N 0 #6.1 x 10<SP>-3</SP>. For a Si varactor, e.g. formed in an epitaxial layer, the N and P-type dopants are preferably P and B respectively.
Patent GB-710897-A (GB)
Title: Improvements in turning piston rings
IPC: B23Q35/10
Filed: 1951-12-27
Abstract: 710,897. Piston rings. ISLER, F. Dec. 27, 1951 [Dec. 28. 1950], No. 30183/51. Class 122(1) [Also in Group XXII] In a method of turning piston rings of heart- or pear-shape on a copying lathe by means of a copying-cam which is prepared from a template and of a shape to turn a piston ring having equal pressure over its whole periphery on compression, mechanism is employed which changes the effect of the copying cam to give the ring a reduced or increased pressure at the ends when the ring is split and compressed. The template is produced by first turning concentrically a cast piston ring of split form while its tongued-and-grooved ends are pinned together by a pin, and thereafter spreading the ends and pinning them together by a second pin. This template is used in a copying lathe to produce a cam of negative configuration which is then mounted in a further copying lathe having an adjustable depth-of-cut and copying mechanism as described in Specification 710,887, [Group XXII], to produce desired heart- or pear-shape rings as shown in Figs. 9 and 10 according to the setting of this mechanism.
Patent GB-695432-A (GB)
Title: An improved interference-preventing resistance
IPC: H01T13/41
Filed: 1951-12-27
Abstract: 695,432. Wire-wound resistors. ROSENTHAL ISOLATOREN GES. Dec. 27, 1951 [Oct. 5, 1951], No. 30221/51. Class 37. A radio and television interference suppression resistor designed for incorporation in a sparking-plug has a length of 15 to 20 mm. and diameter 3 to 4 mm., and comprises a wire of 0.01 mm. diameter wound on an insulating tube in a ceramic covering or casing. The contact members 1, 2, Fig. 5, are in the form of end closure discs having shanks which project into the interior of the wound former. With standard formers, i.e. constant length L, the contact members are selected to produce the required self-capacity according to distance A between the faces of the shanks and/or area a, b of the faces of the shanks. A packing of heat-conductive insulating material may be included between the wound former and the casing.
Patent GB-1115008-A (GB)
Title: Improvements in the manufacture of paper insulated electric cables
Inventor: FEE DONALD JOHN
IPC: H01B13/30
Filed: 1965-07-16
Abstract: 1,115,008. Cables. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. 21 June, 1966 [16 July, 1965], No. 30243/65. Heading H1A. [Also in Division D1] An unsheathed cable core comprising a'conductor or conductors insulated with paper or like fibrous material is drawn continuously through a non-aqueous liquid which serves as a seal into a heated evacuated enclosure where the core is dried and, without being exposed to the atmosphere, is passed through liquid electrically insulating material to impregnate the insulation. As shown, Fig. 2, the drying zone is horizontal tube 23 heated e.g. by a steam jacket and evacuated through outlets 26, the vacuum causing liquid from vessels 24 and 25 to rise into vertical tubes 21 and 22 and form seals. Preferably both vessels contain the same insulating liquid, which may be of the type which is normally solid, e.g. mineral oil containing resinous material. Core 28 may advantageously be heated on passing through vessel 24 and cooled on passing through vessel 25 prior to being wound on a drum or sheathed. Fig. 3 illustrates a cooling arrangement for the impregnated core, in which reference numeral 30 represents a part of the vessel 25 connected through tube 31 to trough 32. A temperature gradient is set up in tube 31 by circulating the insulating fluid through cooler 36 by means of pump 37. To prevent mixing of hot fluid in 30 with cooler fluid in 31, a cooling jacket 34 cools the fluid to form a semi-solid seal around the cable core.
Patent GB-173126-A (GB)
Title: Improvements in or relating to gas burners
IPC: F23D14/10
Filed: 1920-10-27
Abstract: 173,126. Keith, G., Keith, M., Beattie, E., and Jobson, J., (Representatives of Keith, J.), Oct. 27, 1920. Perforated-tube and like multiple-jet burners.-In tubular gas burners, such as are described in Specification 13836/15, in which a valve is arranged at the inner end of an inner chamber to allow part of the gas to pass direct to the outer chamber and thence to the outlet slot or slots, the gas and air inlet end of the burner is bent at an angle to the axis of the tubular burner head so that the valve may be controlled when the burner is in use by means of a spindle extending outside the burner. In one form, in which the valve is a longitudinally slidable sleeve 4, the outer end of the spindle is operated by a removable key 7 and the bent inner end engages an extension 5 on the sleeve 4. In a second form, in which the valve is a rotary hit-and-miss sleeve, the spindle is split at its inner end to form a T- shaped head for engaging cross-cuts in the sleeve, being retained in position by a spring. The Provisional Specification also states that the tubular burner head may be divided into two chambers by a longitudinal diaphragm having perforations which increase in size progressively towards the closed end of the burner. The upper chamber is closed at the end nearest the nipple by a partition having an aperture controlled by a valve, such as a needle valve.
Patent GB-1298269-A (GB)
Title: Improvements in and relating to telephone systems
Inventor: WEIR DONALD ADAMS
IPC: H04Q3/54
Filed: 1970-06-23
Abstract: 1298269 Automatic exchange systems STANDARD TELEPHONES & CABLES Ltd 28 April 1971 [23 June 1970] 30327/70 Heading H4K In a multiexchange system including one exchange equipped with a data processor which is accessible over order wires from the other exchanges, a call originated in one of the latter seizes a register which determines from the initial digit(s) whether an own exchange call is involved and if it is not requests routing data from the processor. The system simplifies the numbering scheme for non-director exchanges which are effectively converted to common control working by the addition of a register/sender having access to a processor in a group switching centre. As shown, a calling line causes its line selector LS to hunt for a register controlled RC which on being found actuates the K relay in the caller's line circuit and starts register connector RCS in its quest for a free register REG. The latter discriminates the first digit such that if it is other than "O" the digits are merely repeated to the group and final selectors for setting thereof in the usual way (relay CON having been brought up by the register). If the first digit is "O" however the register stores further digits and seizes the data terminal attached to the order wire extending to the processor and transmits some or all of the digits thereto. Routing instructions are returned by the processor to the register which, at the conelusion of dialling, operates relay CON and outpulses the routing digits to the group selector followed by the numerical digits of the wanted party's number to the next exchange. Special services may be provided, these being discriminated by the initial, digit. Reception of such a digit causes the register to seize a calling line identifier CLI which checks the caller's class of service before the requested service is actually provided. Key-dialling subscribers are connected via the register and hunter RH to a special bank of receivers for reception of their dialling signals. The registers may be provided on a one per group selector basis or on a one per limited number of group selectors basis so that in the latter case a lockout circuit rather than a register connector may be utilized.
Patent GB-1402917-A (GB)
Title: Partial alkyl and alkoxyalkyl esters and mixed esters of  interpolymers of maleic anhydride with unsaturated compounds
IPC: C08F8/00
Filed: 1972-06-28
Abstract: 1402917 Soil release treatments G A F CORP 28 June 1972 [30 June 1971] 30335/72 Heading DIP [Also in Division C3] An interpolymer ester which imparts soilrelease properties to polyester-containing cellulosic textiles or a mixture of such esters, the interpolymer ester or each component interpolymer ester of a mixture of the esters consisting of the following units (A) and (B) wherein R represents hydrogen, an alkyl group of 1 to 4 carbon atoms, an alkoxy group of 1 to 7 carbon atoms, or an aryl group having a total of 6 to 11 carbon atoms in which the aryl group is a phenyl or naphthyl group or alkyl substituted derivative thereof; R 1  represents an alkyl chain having from 1 to 7 carbon atoms, an oxyalkylene chain having the general formula: R 2 -(OC 2 H 4 ) m - in which R 2  is an alkyl chain having from 1 to 30 carbon atoms and m is an integer of 1 to 10; the units (A) representing 10 to 50% by weight of the interpolymer ester and the units (B) representing 50 to 70% by weight of the interpolymer ester, the interpolymer ester or each component interpolymer ester of a mixture of the esters being water-dispersible and containing 1000 to 25000 units (A) and (B) per molecule and having a molecular weight ranging from 156000 to 4000000 and an asp value of from 0.2 to 3.5 based upon the specific viscosity of the interpolymer ester or component interpolymer ester in methyl ethyl ketone at 25‹C, and in which for the interpolymer ester or for each component interpolymer ester of a mixture of the interpolymer esters the acid number is at least 5% higher than the acid number of the corresponding fully etherified monoester. The textile may have the soil-release properties imparted thereto by application of an aqueous dispersion of the interpolymer ester followed by drying of the treated textile and curing. In examples 5 to 8 polyester-cotton fabrics are padded with solutions containing interpolmer esters prepared from an interpolymer of methyl vinyl ether and maleic anhydride and methyl alcohol and HOCH 2 CH 2 OCH 3 , modified glyoxal type aminoplast resin, a magnesium-based resin catalyst, an anionic surfactant, a textile carbamate resin, an acid salt catalyst and water, dried and cured.
Patent GB-494375-A (GB)
Title: Improvements in or relating to television receivers
IPC: H01J29/16
Filed: 1937-11-06
Abstract: 494,375. Television. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Nov. 6,1937, No. 30512. Convention date, Nov. 9, 1936. [Class 40 (iii)] The picture currents, obtained after detection in a receiver, are supplied to a device for deflecting a cathode ray in the direction of the scanning lines; and a non- linear relation exists between the time T, during which the electrons strike the screen of the tube, and the quantity of light L, which is emitted by the screen under the bombardment. A suitable tube, described in Specification 472,240, has a screen of refractory material which is brought to incandescence by the electronic bombardment.
Patent GB-263284-A (GB)
Title: Improvements in and relating to separators
IPC: B01D21/26
Filed: 1925-12-03
Abstract: 263,284. Fullerton, Hodgart, & Barclay, Ltd., and Aston, J. C. Dec. 3, 1925. Separators without rotary containing-drum.-Grit and the like is removed from water or other liquid by rotating the liquid in a stationary container so that the grit moves to the centre of rotation and sinks into a trapping chamber. The apparatus is particularly for use in a coal mine. The liquid is admitted to the cylindrical casing a through the tangential inlet pipe b. The bottom c of the casing is dished as shown, and has a central opening d communicating with a lower chamber e having a valve controlled opening g. A conduit i rises from the chamber e and communicates with the discharge opening h. The apparatus is kept fully charged when working, and the liquid flowing upwards from the inlet b makes preferably several revolutions. Grit and other solid matter moves to the centre and drops into the chamber e. There is also a slow movement of water through the chamber e up the conduit i to join the main liquid discharge from the casing a at the outlet j.
Patent GB-850767-A (GB)
Title: An improved oil-retaining and dirt-excluding seal for use in association with relatively rotating parts
IPC: F16J15/32
Filed: 1958-09-24
Abstract: 850,767. Stuffing-box substitutes. HILLMAN Ltd., J. & A., and HILLMAN, J. L. July 8, 1959 [Sept. 24, 1958], No. 30582/58. Class 122 (5). In an oil-retaining and grit-excluding seal 1 for a rotatable shaft 7 comprising a pair of axially spaced annular sealing lips 3, 4, grease 8 is supplied to the space 5 between the lips through a passage 9 in the seal to which access if obtained through an opening 11 in a side face of the seal. The opening is closed by a plug 14 after the space has been charged with grease. The seal is reinforced by a ring 2. In the modification shown in Fig. 5, the seal comprises two sealing rings 1a, 1b located in a housing 15 and spaced by a spacer ring 16, two passages 9, 9a and openings 11, 11a each sealable with a plug (not shown) being provided for the insertion of grease from either side of the seal as desired. The lips 3, 4 may be urged into contact with the shaft by garter springs 17 and the seal may be of duprene or neoprene or of one of the materials sold under the Registered Trade Marks "Buna," "Vinoflex," "Hycar," "Caracril" or "Polysar."
Patent GB-159642-A (GB)
Title: Improvements in and relating to means for fixing or suspending side mudguards or screens to motor vehicles and the like
IPC: B62D25/18
Filed: 1919-12-06
Abstract: 159,642. Ticehurst, A. C. Dec. 6, 1919. Lateral.splash guards. - A device, positioned between a wheel axle of a motor vehicle &c. and a lateral-splash guard and designed to absorb shocks to which the vehicle may be subjected, comprises an inner sleeve 11, which is a close fit on the axle 10. An outer ring, with channels 14, is positioned concentric to the sleeve 11 by spiral springs 15, which fit at one end over pins 13 on the sleeve 11 and at the other into the channels 14. The guard is supported from lugs 16 on the outer sleeve. The springs may be replaced by a rubber ring fitting closely between the two sleeves.
Patent GB-1399376-A (GB)
Title: Load support device
IPC: B60S9/04
Filed: 1972-06-29
Abstract: 1399376 Stands; furniture feet BALMFORTH ENG Ltd 1 June 1973 [29 June 1972] 30619/72 Headings A4H and A4U [Also in Divisions B7 and E1] A load support device comprises a free standing, firm, structure incorporating at least one upright elongate load-bearing member 1 supported above the ground by at least two separate ground-engaging leg members 5, said members 5 being removably mounted on the member 1 in at least two positions by legs or slots on or in the members 5 coacting with slots or lugs in or on the member 1 so that the device is adjustable in height. As shown, elongate member 1 is tubular and includes slots 2, and each leg member 5 is of channel section and has two pairs of lugs 7 that engage in respective slots 2 with the neck 10 engaging the upper ends of the slots 2. The leg member 5 may be releasably locked by a spring clip 12 having flanges 13 engaged in slots 14 in leg member 5 and projecting portions 15a which can be sprung into slots 2 in member 1. Four elongate members 1 may be connected by bridge members (18), Figs. 11, 12, (not shown) having lugs at their ends. The upper ends of the elongate members 1 and the bridge members may receive stubs carrying load engagable members (17), Figs. 7-10 (not shown) which receive e.g. planks, axles, automobiles.
Patent GB-1038439-A (GB)
Title: Fluid-pressure relief valve
IPC: F16K17/04
Filed: 1965-07-19
Abstract: 1,038,439. Valves. NEYRPIC. July 19, 1965 [July 27, 1964], No. 30623/65. Heading F2V. An annular valve-seat 1 is held in a supporting flange 2 by a ring 3 on the flange 4 of a duct 5; and a valve plate 8 is loaded on to the seat 1 by a spring 9 acting through a disc 10. The spring 9 is located by a plate 12 bearing on a flange 13 adjustably held by six threaded rods 14 between tapered washers 15. A cover 18 is secured by a ring 19 and bolts 20. A collar 21, in two or more pieces, may be temporarily disposed around the seat whereupon the cover 18, seat and plate 8 may be removed and replaced whilst the spring remains in position. The collar 21 may be a tight fit round the plate 8 to provide a lock therefor during transit.
Patent GB-970307-A (GB)
Title: Improvements in or relating to shuttle valves
IPC: F16K11/044
Filed: 1961-08-25
Abstract: 970,307. Valves. AIRMATIC VALVE Inc. Aug. 25, 1961 [Nov. 2, 1960], No. 30723/61. Heading F2V. A shuttle valve comprises a valve body 10 having a bore 12 provided with opposed end walls 18, an inlet port 24 communicating with each end of the bore and an outlet port 28, a tion. The spacing of the rings need not be regular. The thickness of the wall of the hose is valve member 30 reciprocable in the bore and engageable with one of the end walls at each end of its stroke to place the outlet port in communication with a selected one of the inlet ports while closing the other inlet port, means providing a restricted passage for the flow of fluid past the valve member, and cooperating means 32, 34, 40 on the valve member and the valve body for trapping fluid in the bore between the valve member and one of the end walls thereby to cushion engagement of the valve member with the end wall as the trapped fluid escapes through the restricted passage. The valve member 30 comprises a central portion 32 and two plunger portions 34, the diameter of the portion 32 being slightly less than the bore 12 in order to provide a clearance space constituting the restricted clearance. In operation fluid pressure in one inlet acts on the end of the respective plunger portion 34 and opens the valve, the opposite plunger entering a socket 26 formed in a screwed plug 16 constituting the end wall, fluid trapped in the space between the portion 32 and a seat 38 escaping through the restricted passage until the portion 32 engages the seat.