baber/WOPTO huggingface dataset:
Patent GB-1014297-A (GB)
Title: Improved abrasive article
IPC: B24D3/00
Filed: 1962-08-22
Abstract: 1,014,297. Abrasive articles. ARMOUR & CO. Aug. 22, 1962 [Nov. 24, 1961], No. 32337/62. Heading B3D. An abrasive pad or web comprises a non- woven web of randomly interlaced fibres bonded at crossing contact points by a binder having a Knoop hardness number of 6 or less, preferably 1 or 2, forming a substantially continuous film about the fibres, and abrasive grains resiliently bonded to the fibres to form a protective covering generally throughout their length. The fibres may be of organic material, such as nylon, crimped or curled three-dimensionally and brought into interlaced non-woven relation and integrated into a pad or web by a plasticized elastomer binder, e.g. rubber, latex, butadiene-styrene dispersions, neoprene, polyvinyl chloride or vinyl latex. The binder may be sprayed or rolled on the web or the latter may be dipped into a slurry of the binder. The abrasive grains, which may be silicon carbide, aluminium oxide, garnet, flint, emery or pumice,' may be applied with the binder or applied after the binder by gravity, rolling or electrostatic deposition; two coatings of binder may be applied. The binder and abrasive may be applied from one or both sides of the web. The finished web may be secured to a belt for abrading articles, such as bumpers.
Patent GB-410491-A (GB)
Title: Improvements in or relating to the manufacture of permanent-magnet electrical apparatus
IPC: H04R9/02
Filed: 1932-11-16
Abstract: 410,491. Magnetizing and demagnetizing permanent magnets. TENNY, H. S., and BRITISH ROLA CO., Ltd., 179, High Road, Kilburn, London. Nov. 16, 1932, No. 32428. [Class 35.] Apparatus for magnetizing the magnets of loud-speakers &c. after the parts are assembled consists of a transformer the secondary of which comprises a heavy conductor adapted to be passed through the openings in the magnet. The secondary may consist of a horseshoeshaped portion 17 threaded through the openings in the magnet 11, and a similar portion 20 embracing the core 18 of the transformer. The magnet is preferably cleaned by an air-blast before magnetization and magnetized on breaking the primary circuit of the transformer. If necessary the magnet may be de-magnetized before assembly by a winding connected to the secondary of a step-down transformer through which a current, the strength of which is found by trial, is passed and rapidly reduced to zero. Specification 333,578, [Class 35], is referred to.
Patent GB-770877-A (GB)
Title: Improvements in feed-tables for sheet feeding apparatus
IPC: B65H5/08
Filed: 1954-03-03
Abstract: 770,877. Feeding sheets. SCHNELLPRESSENFABRIK AKT.-GES. HEIDELBERG. March 3, 1954 [April 11, 1953], No. 32517/55. Divided out of 770,876. Class 100(1) A feed-table for sheet-feeding apparatus is of arcuate form in the direction of travel of the sheets. As shown, the feed-table 3 is arranged between the impression cylinder 1 of a printing press and the stack 2 of paper sheets. The table is curved throughout its entire length, and sheets are fed thereover by apparatus as described in Specification 770,876, which includes grippers 4 on endless chains. The sheets passing over the curved table have increased rigidity, and very thin sheets can be registered without the danger of buckling.
Patent GB-730063-A (GB)
Title: Improvements in endless belt drafting mechanisms for textile fibres
IPC: D01H5/26
Filed: 1952-12-23
Abstract: 730,063. Fibre drafting arrangements. CASANOVAS, J. M. S. Dec. 23, 1952, No. 32560/52. Classes 120(1) and 120(2). A double-belt drafting mechanism has two condensers connected together for simultaneous traverse movements and located at the entrance to the belts and delivery rollers and means of low electrical conductivity mounted on the belt cradle in contact with the lower belt for removing fibres from its surface. Because the condensers 18, 19 are coupled together by the two extensions 20, 21, they move in unison mainly under the influence of the thicker part of the sliver in front of the belts 7, 8. If the top belt 8 and its roller 4 are removed, the condenser 18 hangs from the cross piece 13. In order to facilitate the introduction of the condenser 19, the plates 12 of the cradle have slots 27, 28 into which the arms 9, 10 of a tensor may be lifted. Tensors having different spacings between the arms are accommodated in the slot 28 by the formation of notches on the underside of the arm 10. The lower cross piece 14 of the cradle is covered by a piece 15 of leather or other material that is a poor conductor of electricity.
Patent GB-1030124-A (GB)
Title: Electrical circuits including a field-effect transistor
IPC: H01L29/00
Filed: 1963-08-16
Abstract: 1,030,124. Field effect transisor circuits; gramophone pick-up circuits. RADIO CORPORATION OF AMERICA. Aug. 16, 1963 [Sept. 7, 1962], No. 32583/63. Headings H3T and H4J. [Also in Division H1] A circuit arrangement including an insulated gate field effect transistor (MOS transistor) comprises an input circuit connected between the gate and source electrodes such that a zero D.C. potential is maintained therebetween under " no signal " conditions and an output circuit connected between the drain electrode and a point of reference potential for the circuit to which the source is directly connected. The input impedance of the transistor is of the order of 10<SP>14</SP> # and in general it is so constructed (see Division H1) that the zero gate bias curve 47 of the drain current-drain voltage characteristic lies in the middle of the linear operating region of the transistor. A tuned I.F. amplifier using such a device is depicted in Fig. 4 (not shown). In the superhet second detector circuit of Fig. 5 the MOS transistor 108 is selected to have a zero bias characteristic which corresponds to curve 49 (Fig. 2), so that for low level input signals it operates substantially linearly and for high level negativegoing signals the bias point is moved towards the centre of the linear operating range so as to ensure that these signals are also amplified linearly. AGC or amplified AGC may be derived from resistors 104 or 110 respectively. In a similar embodiment (Fig. 6, not shown), the gate electrode 107 is connected to the " top " of the gain control 104 and its slider 106 is connected through a capacitor to earth. An AF amplifier is described with reference to Fig. 7 (not shown), wherein a piezo-electric pick-up is connected across a potentiometer, the wiper of which is connected to the gate electrode of the M.O.S. transistor. A direct coupled linear amplifier in which the first M.O.S. transistor is chosen to have a zero bias characteristic corresponding to curve 47 and later transistors are chosen to have zero bias characteristics corresponding to one of the curves 43 to 46 in dependence upon the drain current flowing in the immediately preceding transistor under " no signal " conditions is depicted in Fig. 8 (not shown).
Patent GB-890581-A (GB)
Title: Converter with refining lance
IPC: C21C5/46
Filed: 1958-10-14
Abstract: 890,581. Refining iron. DEMAG A.G. Oct. 14, 1958 [Nov. 13, 1957], No. 32825/58. Class 72. A converter has a refining lance bent so that the nozzle lies on the central axis while the shaft is nearer the inner wall of the converter, and a second lance for burning carbon monoxide with its nozzle on said axis above the first nozzle. As shown, a refining lance 3 has a shaft 5 with rollers 10 running in curved guides 12 so shaped that as the lance is raised it is rotated first anticlockwise to allow the bent portion to pass through the mouth of the converter and then clockwise to swing the lance clear of the converter. The second lance 6 has similar rollers 11 and guide 13, the lances being interchangeable. Specification 819,414 is referred to.
Patent GB-1481850-A (GB)
Title: Apparatus and method for detecting locating and optionally indicating leaks in pipeline segments
IPC: G01M3/18
Filed: 1974-07-25
Abstract: 1481850 Determining leak location electrically B BRANDES 25 July 1974 [26 July 1973] 32875/74 Heading G1N To determine the position of a leak 10 from an electrically conductive pipe-line carrying fluid, a ninevolt battery is connected to the pipe-line by a line 20 whereby if a leak occurs to short the pipe-line to a signal conductor 6, fastened to the pipe-line but insulated from it in the absence of a leak, current flows via line 20, the pipe-line, conductor 6, and resistor 26 to cause changeover of switch 27. Thereby the positive pole of a twenty volt battery is connected to one end 13 of the conductor 6 of which the other end 11 returns to the battery via diode 24 and line 23, the potential across the conductor being stabilized by a Zener diode 25. The voltmeter 12 thus lies in a measuring loop constituted by diode 31 line 32, the pipe-line, that length of the conductor 6 lying between the leak and the end 11, diode 24 and line 23. Thus the voltage indication on the voltmeter represents the distance of the leak from a datum point on the pipe-line, usually the end of a line segment disposed in a manhole. An amplifier 33 is disposed across a resistor 29 disposed in the line 28 from the twenty volt battery to the conductor 6 and acting in response to current flow in the line 28 to cause the voltmeter to retain its reading. The voltmeter may be a digital voltmeter.
Patent GB-601565-A (GB)
Title: Improvements in and relating to dynamoelectric machines
IPC: H02K1/18
Filed: 1945-12-05
Abstract: 601,565. Cores for dynamo-electric machines. BRITISH THOMSON-HOUSTON CO., Ltd. Dec. 5, 1945, No. 32910. Convention date, Dec. 6, 1944. [Class 35] Stator laminµ are secured together by ribs 8 in grooves 3 in the periphery of the assembled laminµ, the bifurcated ends of the ribs 8 interlocking in curved notches 6 in each of the non- magnetic end rings 4, 5. The Specification as open to inspection under Sect. 91 comprises also a modification wherein the laminµ are embraced by a non-magnetic stamping with end ring elements 9 integral with rib elements 10 occupying axial grooves in the core pack, the edges 12 of the stamping being welded together after it has been sprung into position. Projections 14 space the ring portions slightly from the outer laminae. This subject-matter does not appear in the Specification as accepted.
Patent GB-919731-A (GB)
Title: Improvements in or relating to mixing machines
Inventor: HARRISON KENNETH JAMES
IPC: B28C5/16
Filed: 1960-09-26
Abstract: 919,731. Concrete mixers. LINER CONCRETE MACHINERY CO. Ltd. Sept. 18, 1961 [Sept. 26, 1960], No. 32937/60. Class 86. A concrete mixer of the type having a stationary annular mixing pan within which rotates a mixing unit comprising a hub rotating about a vertical axis and carrying one or more arms is driven by an hydraulic motor, fluid for which is supplied by a pump or pumps driven by a prime mover associated with the mixer. As shown in Fig. 1, an hydraulic motor 12 supported by a spider 11 on the pan 10 drives a hub 14 and arms 15 from which depend detachable extensions 16 carrying stirrers 17. In another embodiment, Fig. 2, the hydraulic motor is supported by the cover of the central chamber of the annular frame. In modifications (see Figs. 3 and 4, not shown) the motor shaft is fixed and its casing rotates, pressure fluid being supplied by pipes through the shaft. The motor may drive directly or through gearing, which may be housed in the hub. The motor speed may be regulated by a control valve or there may be more than one motor, each arranged to drive the mixer at a different speed. There may be a discharge door or shutter in the base of the pan.
Patent GB-191256-A (GB)
Title: Improvements in or relating to leading mechanisms for type composing machines
IPC: B41B7/04
Filed: 1921-12-08
Abstract: 191,256. Nash, W. E., and Lanston Monotype Corporation, Ltd. Dec. 8, 1921. Leading-mechanism for single-type composing and casting machines. Relates to leading-mechanism for machines such as those described in Specification 8633/99. The leads J are arranged on a platform H<1> alongside and level with the galley A, and are pushed forwards against the galley-rule B by spring-pressed plates K<4>. A retaining-plate L, adjustably mounted on the rule B between the leads and the galley, contains an opening wide enough to allow a single lead to pass. The leads are slid one by one into a chamber formed between the rule B and an attached plate B<1> by a latch M, which is operated under the control of the operator by the slide F that actuates the line-hook G.
Patent GB-433942-A (GB)
Title: Improvements in or relating to the thermostatic control of steam generators
IPC: G05D23/275
Filed: 1933-11-25
Abstract: 433,942. Instantaneous steam generators. SENTINEL WAGGON WORKS, Ltd., Iddesleigh House, Caxton Street, Westminster, and DOBLE, A., Alta Vista, Ridgebourne Road, Shrewsbury. Nov. 25, 1933, No. 33019. [Class 123 (ii)] The water supply to a coiled tube steam generator is controlled by two thermostats one in the path of the steam and the other in the part of the coiled tube that, during the normal working of the generator, sometimes contains water and sometimes steam. A byepass valve in the feed pump delivery pipe 25 is controlled by a solenoid 26 in an electric circuit containing switches 38, 39 operated by the expansion and contraction of two U-tubes 29, 30 which are connected in series with the generator tubing. The U-tube 30 is connected between the spiral water heating coils 13 and the helical steam heating coils 15, and the U-tube 29 is connected between the steam heating coils and the delivery pipe 31. The two U-tubes are supported in a sleeve 27 in the generator casing. The movements of the ends of the U-tubes are communicated to the switch arms by non-expansible rods 35. A third U-tube 46 through which the feedwater flows on its way to the coils 13 may be welded to the limbs of the U-tubes 29, 30. A throttle valve 32, which is partly closed at light loads, is interposed between the coils 13 and the steam heating coils. In a modification, the U-tube 29 operated in accordance with the steam temperature is arranged between the spiral steam-heating tube 14 at the top of the generator and the helical steam-heating tubes 15. The electric circuit may also contain a switch operated by a diaphragm or the like acted upon by the pressure in the generator in front of the throttle valve. Specification 416,321 is referred to.
Patent GB-723407-A (GB)
Title: A device for conveying the tape of magnetic recorders
IPC: G11B15/18
Filed: 1952-12-31
Abstract: 723,407. Magnetic recording and reproducing apparatus. KURZEDER, U. Dec. 31, 1952 [Dec. 31, 1951; Dec. 10, 1952], No. 33126/52. Class 40 (2)  In a magnetic tape recorder, a capstan shaft has a flywheel connected thereto which is adapted to drive the tape reels: In the embodiment described, with reference to Fig. 1, a capstan shaft 9 carries a cupshaped flywheel 11 having external 1 and internal bevelled surfaces 12, 14 respectively. The tape spools are carried by rotatable shafts 1, 2. The shaft 2 carries the take-up spool and has a spring-loaded inner shaft 5 from which depends a part 16 having bristles 17 which brush against the inner surface of the flywheel 11 to produce a slipping drive for winding on tape during forward winding. The shaft 1 carries the supply spool and has a spring-loaded inner shaft 4 depending from which is a bevelled flange 15 which may be pressed down against the resistance of spring 6 into engagement with the bevelled surface 12 of the flywheel 11 when it is desired to rewind the tape. A fast forward winding may be effected by similarly pressing down the shaft 5 until a similar flange 18 engages the bevelled surface 14 of the flywheel 11. In a second embodiment described with reference to Figs. 2, 3 and 4, Figs 2 and 4 not shown, the flywheel 11 is provided with grooves for belts 29, 30 coupled respectively to a friction wheel 31 and a wheel 35 on a shaft 25 carrying the take-up spool. The supply spool is supported on a shaft 24 on which is mounted a friction wheel 36. The shafts 24, 25 are mounted in a baseplate 26 pivoted about a shaft 27. During normal forward winding the shaft 25 carrying the take-up spool is slippingly driven by the loose belt 30, as shown in Fig. 3. When rewinding, the baseplate 26 is rotated counter-clockwise until the friction wheel 36 is pressed into engagement with the friction wheel 31. For fast forward winding the baseplate 26 is rotated clockwise until the belt 30 is tensed and a positive drive effected.
Patent GB-840266-A (GB)
Title: Pivotal bearings for lever arms or beams in machines of precision
IPC: G01G21/00
Filed: 1957-10-24
Abstract: 840,266. Weighing apparatus. HARPER & CO. Ltd., J., and KIBBLE, G. Oct. 21, 1958 [Oct. 24, 1957], No. 33171/57. Class 143 [Also in Group XXXIV] Domestic beam-type weighing scales comprise a weighing platform 20, upon which the scale pan 21 rests, supported by oppositely directed weighing levers 22 which are pivotally suspended by links 23 at their outer ends and are interconnected by a pivotal link 24. One of the weighing levers 22 is also connected by a pivotal link 25 with a weigh beam 26 which is adapted to tilt, under the load to be weighed, about a transverse knife-edge 27 engaged at its ends in V-notched bearing blocks 28 fixed in the side walls of the casing 29. The ends of the weigh beam 26 are connected by an external frame 30 along which counterweights 31 and 32 are adjustable. Attached to the underside of the platform 20 are supporting legs 36 having mounted upon the lower portion of each an inverted V-shaped bearing 37 of hardened steel wire adapted to engage knife-edges 39 on the weighing levers 22 (see Group XXXIV).
Patent GB-802437-A (GB)
Title: Improvements in electric selector switches
Inventor: BENYON PETER RICHARD
IPC: G05B19/04
Filed: 1955-11-19
Abstract: 802,437. Keyboard switches. MINISTER OF SUPPLY. Nov. 19, 1956 [Nov. 19, 1955], No. 33178/55. Class 38 (5). A selector switch comprises two spaced groups of contact carrying members, one group crossing the other, the members of the first group being movable lengthwise to and fro and those of the other group being movable out and back so as to close selected contacts by a combination of movements of the appropriate members of the two groups. In one, form, one group 11 ... 18 is horizontal and the other group 21 ... 28 is vertical, each member of each group having a contact spring, e.g. 114, 241 where it crosses the members of the other group. In order to complete a circuit, e.g. between members 11 and 24, the latter is moved in direction a, Fig. 1, into the position of Fig. 4a, member 11 is then moved in direction b, Fig. 1, 24 is moved back in direction c, Fig. 1, into the position of Fig. 4c, and finally member 11 is moved in direction d, Fig. 1, into the position of Figs. 4d, 5d to engage contacts 114, 241. In order to prevent disengagement of these contacts on subsequent downward movement of member 24, contact 114 may be formed as a spring wire 199 and contact 241 as a channel-shaped member 291, Figs. 6d, 6e, 7d. The form of contacts 199, 291 may be reversed. The backs of one or both of the sets of contacts may be insulated to prevent undesired contactmaking in the Fig. 3 position. The members of one group may be " folded back " upon themselves, Fig. 8, to give three rows of contacts 311 ... 316, 317 ... 322, and 323.. 328 co-operating with three rows of contacts 411 ... 461, 471 ... 521, 531 ... 581.
Patent GB-780665-A (GB)
Title: Improvements relating to electronic audio frequency amplifiers
Inventor: MOIR JAMES
IPC: G11B5/00
Filed: 1954-11-16
Abstract: 780,665. Valve amplifying circuits. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 16, 1955 [Nov. 16, 1954], No. 33184/54. Class 40 (6). In an amplifier fed from a magnetic reproducing head M via an input transformer T1, and in which the first valve is indirectly heated from a mains transformer winding T2 and provided with a cathode bias resistor R1, a series grid resistor R2 is also provided. The value of the resistor R2 is small compared with the input impedance of the valve, but large compared with the referred impedance at the secondary terminals of the input transformer at mains supply frequency, its purpose being to minimize the feedback of mains energy to the magnetic reproducing head if the heater/cathode insulation breaks down.
Patent GB-189657-A (GB)
Title: Apparatus for separating air or gas from material suspended therein
IPC: B04C1/00
Filed: 1921-12-12
Abstract: 189,657. Blyth, C. E. Dec. 12, 1921. Density separators.-Dust-laden air is cleaned mainly by a rotating member in an enclosed chamber, the rotating member being arranged to intercept the suspended particles and to deliver them centrifugally outside the air current. In the form of separator shown in Figs. 1 and 2, for dealing with comparatively coarse material, the air is first admitted to a cyclone chamber 2 where the heaviest particles are deposited. From this chamber the gas passes into a chamber 3 where it impinges on a rotating concave plate 4 which effects a further separation. The plate 4 may be of spider form provided with flanges or channels to throw the particles clear of the air current. Finer particles are separated from the air by the rotary member 6, which may be secured to the shaft of the plate 4, and consists of a close series of radial vanes 9 flanged along one edge 10. The gas leaves the chamber by the outlet 7 which may be cowled as shown, and an exhaust fan mav be arranged within the housing 11 from which the purified air escapes through the opening 12. The separated particles in the chambers 2, 3 may be discharged through a rotary valve 13 or through a canvas sleeve. In a modification, the apparatus is arranged for a vertical drive.
Patent GB-1438175-A (GB)
Title: Device for evaluating mental competence
IPC: A61B5/18
Filed: 1973-07-12
Abstract: 1438175 Testing drunkenness NISSAN MOTOR CO Ltd 12 July 1973 [15 July 1972] 33344/73 Heading A5K [Also in Division H4] Apparatus for evaluating the state of drunkenness of a driver, comprises an electric light, a control voltage generating circuit 32 including a switch to be closed by an examiner in response to the appearance of a critical flicker frequency in the light, for producing continuously varying voltage pulses until the switch is closed, a pulse shaping circuit 34 for producing pulses whose repetition rate is determined by the control voltage, a plurality of memory circuits 36 responsive to the closing of the switch for registering the control voltage when the switch is closed, a counting circuit 38 for monitoring the number of times the switch is closed, a mean-value evaluating circuit 40 for producing an output representative of the mean value of the voltages registered by the memory circuits 36, a deviation calculating circuit 42 for evaluating the deviation of the voltages registered by the memory circuits 36 from the mean value, and an examining circuit 44 for determining wherter the mean and the deviation are acceptable. The apparatus also includes a signal holding circuit 44 which displays the result of the test for some time after the switch is closed and a switch which opens ignition circuit of the vehicle if the test is unsuccessful. The above circuits are all described in detail.