baber/WOPTO huggingface dataset:
Patent GB-1440278-A (GB)
Title: Magnetic recording apparatus
IPC: G11B15/61
Filed: 1974-03-06
Abstract: 1440278 Helical-scan tape recorders INTERNATIONAL BUSINESS MACHINES CORP 6 March 1974 [2 April 1973] 10014/74 Heading G5R A magnetic tape 18 is helically wrapped around a mandrel comprising two portions 12, 14 between which is mounted a rotor 10 carrying a transducer 16 which scans the tape 18, the rotor 10 having a surface adapted to provide an air bearing so that the tape is supported substantially continuously over the rotor and mandrel surfaces. The rotor surface may be either perforated or porous, air being pumped to the inside of the rotor, and the mandrel portions 12, 14 also may provide air bearings.
Patent GB-540503-A (GB)
Title: Improvements in and relating to building construction
IPC: E04B2/56
Filed: 1940-06-08
Abstract: 540,503. Floors; walls; roofs. BARNETT, T. H. June 8, 1940, No. 10024. [ Class 20 (iv) 1, In the construction of walls, floors &c. by means of precast slabs of concrete or other material secured to spaced posts or beams which are provided with longitudinal grooves to receive the correspondingly-shaped edges of the slabs, the width of the slabs is slightly less than the distance between adjacent posts or beams so that they may be moved into position in a direction substantially at right angles to the axis of the posts or beams and secured by key strips. Figs. 1, 2 show double and single-thickness walls in which the concrete slabs 3 engage loosely in grooves in the concrete posts 2 and are secured by key strips 4 which may be wiped over with cement wash if a permanent joint is required. The grooves may be shaped so that the slabs engage tightly at one side, as in Fig. 3, only one key strip being necessary at each edge. Corners may be formed of two posts and a connecting quoin member 9 as in Fig. 7. The grooves may be of curved form as shown in Fig. 9 with correspondingly curved key strips 10. Slabs may be supported by a curved roof beam in a similar manner. A beam for supporting floors is formed at its ends with recesses to suit the construction of the wall on which it is to rest.
Patent GB-827188-A (GB)
Title: Improvements in or relating to electrically controlled gummed strip or tape serving machines
IPC: B65B51/06
Filed: 1956-04-03
Abstract: 827,188. Tape dispensers. BETTER PACKAGES Inc. April 3, 1956 [March 30, 1955], No. 10100/56. Class 18. [Also in Group XXXVII] A tape dispenser of the kind described in Specification 643,731 in which delivery of tape is controlled by an electric timing device, has means to prevent initiation of a further feeding cycle until a cycle in progress is completed. As in the earlier Specification a series of keys may be provided corresponding to various lengths of tape and the depression of each key initiates the tape feed and applies current via a resistance peculiar to the key, to a condenser, the full charging of the condenser firing a gas discharge tube, in this case a thyratron. Firing of the tube causes cessation of feed and operation of a cutter solenoid. The keys (see Group XXXVII) initiating feeding in the present Specification have each a controlling solenoid so that when they are depressed they remain so until released by the solenoid. Each key closes successively piled contacts for initiating the feed and timing operations and for energising a protecting solenoid. The latter remains energised during the feed cycle and maintains open contacts which prevent the initiation of another cycle by the pressing of a further key until the end of the first cycle de-energises the solenoid. A series of keys 44 may be arranged in a casing separate from the dispenser and the lengths they represent may all be augmented by a given fixed amount by throwing in an additional resistance by operating a switch 182. Alternatively, one or two keys only and each associated with an adjustable resistance and dial and pointer may be provided to deliver one or two lengths only. An additional resistance may be added as before, Figs. 11-16 (not shown).
Patent GB-1534894-A (GB)
Title: Magneto-optic analysers
IPC: G01N21/21
Filed: 1976-03-15
Abstract: 1534894 Magneto-optic analyzer HITACHI Ltd 15 March 1976 [14 March 1975 7 May 1975 20 June 1975 29 Sept 1975 14 Nov 1975] 10317/76 Heading G1A A magneto-optic analyzer for detecting and identifying atoms in a sample 3 comprises a light source 1, e.g. a laser, a birefringent polarizer 2 from which the light emerging in two directions 9, 10 has different planes of polarization, a reflector 6 and a detector 5 positioned to receive forward scattered light from the sample 3 along a path 11, this being separated from the incident light path by the polarizer 2 following the rotation of the plane of polarization of the scattered light during its double passage through the sample 3 by a magnetic field produced by means 7, 8. Rotation of the polarizer 2 by motor 13 produces amplitude modulation of the light received by detector 5 the A.C. component of which represents the forward scattered light and can be separated electronically from the noise signal produced by leakage light through the polarizer. Leakage light may be reduced per se by wavelength selective filters, prisms or diffraction gratings arranged along the optical path or combined with reflector 6. In a further embodiment Fig. 6 (not shown) a further polarizer (2') transmits only scattered light to detector 5 which has a plane of polarization orthogonal to that of the incident light on the sample. Second detectors (10) Fig. 7 and 5-1 Fig. 8 (not shown) may be positioned to receive light from the sample not deflected by the polarizer (2) and provide a compensating signal for fluctuations in light level caused by foreign atoms &c. in the sample. Still further improvements in signal-noise ratio may be achieved by modulating the light from the sample by a chopper (13) Fig. 9 (not shown), by angularly oscillating the reflector (6), or by rotating the magnetic field Fig. 12 (not shown). The signals from detector 5 are then passed to demodulating circuits, Figs. 11a-11c (not shown) and (Fig. 12).
Patent GB-901579-A (GB)
Title: Improvements in or relating to permeable diaphragm material
Inventor: BOOTH FRANK
IPC: H01M50/491
Filed: 1960-03-23
Abstract: 901,579. Permeable diaphragm material. OLDHAM & SON Ltd. March 23, 1960, No. 10344/60. Addition to 843,452. Class 140. [Also in Group XXXVI] Permeable diaphragm material having pores of predetermined size comprises a base diaphragm material of sintered thermoplastic powder having formed thereon and extending over at least one face thereof a continuous lacelike network of a thermoplastic, the network comprising abutting finely-divided particles of the thermoplastic fused together at their points of contact and adhering to the base diaphragm material, and the pores of predetermined size being constituted by the interstices of the continuous lace-like network. The permeable diaphragm material may be an electric storage battery separator material, the base diaphragm material being a base separator material, which may be comprised of sintered polyvinyl chloride powder having an average particle diameter of about 10 microns and the lace-like network may be comprised by a mixture of finely-divided particles of polyvinyl chloride, the predominant constituent having an average particle diameter size of ¢ to 1 micron and the other constituent having an average particle diameter size of 10 microns. One face of the base separator material may be ribbed and the network extends over the ribbed face. The size of the pores of the base diaphragm are reduced to a predetermined extent by applying to the face of the material finely-divided particles of a thermoplastic so as to form a layer of abutting particles on the face and then fusing, e.g. at about 150 C., the particles at their points of contact to form the continuous lace-like network. The particles may be brushed over the face of the base diaphragm material so that the particles penetrate into the existing pores of the material. The base diaphragm material may be advanced in the form of a continuous web past a falling curtain of particles and the layer of particles levelled off to effect a uniform distribution over the face of the material prior to brushing in. The base separator material may be prepared by sintering together, at about 250 C., particles of polyvinyl chloride powder having an average particle diameter of about 10 microns. Particles of polyethylene, polystyrene or acrylic resin may also be used. As shown, particles from vibrating hopper 4 fall on conveyer belt 1 and are consolidated to a required thickness and shape by ribbed roller 5, which may be heated, prior to sintering in oven 6 and subsequent cooling by blower 7. A curtain of particles from vibrating hopper 8 forms a coating on the sintered base material which is levelled off by stationary brush 9 which also removes surplus particles. Rotating brush 10 forces the particles into the pores of the base material prior to sintering in oven 11, cooling by blower 12 and passage through cutters 13.
Patent GB-454774-A (GB)
Title: Improvements in or relating to driving mechanism for rotary printing machines
IPC: B41F13/00
Filed: 1936-04-08
Abstract: 454,774. Printing - machines. QUICK, C. G., and BALL, D. A., 109, Borough Road, London. April 8, 1936, No. 10402. [Class 100 (ii)] In a multi-unit rotary printing-press comprising two or more units 6, 7, 8, each unit is driven by an electric motor 9 arranged below the unit and within or substantially within the confines of the main frame members 1 of the machine. In the machine shown, the motors 9 are supported on a subframe 10 carried by the side frames 1, and the shafts of the motors are preferably arranged to extend beyond the frame 7 and are fitted with sprocket wheels connected by chains to the shafts of one impression cylinder of each unit. An additional motor 15 may drive a late-news printing-machine 19, and also a colour printing-couple 20 arranged above the units 6, 7, 8. The course of the webs delivered by the rolls 5 may be controlled by turning bars 21, and guide rollers 22.
Patent GB-822240-A (GB)
Title: Improvements in or relating to reading heads for magnetic recordings
Inventor: WILLIS DONALD WESLEY
IPC: G11B5/33
Filed: 1957-03-29
Abstract: 822,240. Recording &c. heads &c. DECCA RECORD CO. Ltd. May 16, 1958 [March 29, 1957], No. 10429/57. Class 40 (2). A magnetic reading head for stationary or near-stationary magnetic records has at least one moving ferro-magnetic member working in an auxiliary gap(s) to chop the signal. In the Fig. 1 arrangement, a wheel 19 with teeth on its periphery (Fig. 2, not shown), rotates on the axis 20 so as to cause a cyclic variation in the reluctance of the auxiliary gap 16 when the reading gap 15 is reading the record 10. In the Fig. 3 arrangement, the auxiliary gap, at the top, is bridged by the cylindrical member 36, fitted with strips 37 of non-magnetic material. In both arrangements, but particularly with that of Fig. 3, a single rotating assembly can be arranged to serve a plurality of reading heads.
Patent GB-848508-A (GB)
Title: An electromagnetic incremental displacement detector
Filed: 1958-04-01
Abstract: 848,508. Electric selective signalling systems. HUGHES AIRCRAFT CO. April 1, 1958 [April 1, 1957], No. 10478/58. Drawings to Specification. Class 40 (1). An electromagnetic increment displacement detector comprises a scale of magnetic material having scale divisions of differing magnetic characteristic defining a scale path, an electromagnetic detector head assembly comprising a plurality of individual electromagnetic heads having respective pole-faces individually providing magnetic resolution of said scale, and means mounting said head assembly and said scale in flux linking relationship for relative movement along said scale path. As described, relative movement of an engraved or etched metal scale and a sensing- head is detected by sensing the variation of inductance in the head as it passes successively over the high and low portions of the engraved scale. In the preferred embodiment the scale is engraved with equi-spaced parallel lines and two heads are used, the heads being positioned such a distance apart from each other that the signals they produce are ninety degrees out of phase with each other. Thus from the signals produced by the heads it is possible to tell in what direction the scale is moving and it is also possible to detect increments of motion of the scale which are one-quarter the distance between the lines on the scale. A suitable head is described (Figs. 1, 2, not shown) and the signals produced can be processed by a device, such as shown in Specification 811,616 which is referred to, for producing pulses that can be counted.
Patent GB-783405-A (GB)
Title: Improvements in or relating to centrifugal separators
IPC: B04B1/12
Filed: 1956-04-06
Abstract: 783,405. Centrufugal separators HERCULES POWDER CO. April 6 1956 [July 6, 1955], No. 10633/56. Class 23 In a separator for liquids comprising a bowl 10 having a receiving chamber 15 above and communicating with a separating chamber, and a dam 21 at the bottom of the wall 20 of the separating chamber having horizontal and vertical surfaces, passages 23 for the heavier component lead outwardly from the horizontal surface and outlets 28 for the lighter component lead outwardly from the vertical surface. A mixture of liquid nitric ester and spent acid is fed by a pipe 16 to the receiving chamber and passes to the separating chamber through passages 17. The spent acid flows through the passages 23, through passages 24. and over the inner surface of the bowl to discharge through outlets 25 into a receiver 26. The nitric ester is discharged from the outlets 28 into a receiver 29. To accelerate the liquid in the bowl the wall of the chamber 15 may be provided with vanes of synthetic plastic, or the pipe 16 may discharge on to the inner surface of a stationary semi-circular baffle having a lower edge spaced from the bottom of the receiving chamber. A plug 31 of synthetic plastic affords access to the bowl for cleaning. The bowl and receivers are of stainless steel.
Patent GB-358460-A (GB)
IPC: B03D1/002
Filed: 1930-04-04
Abstract: The precipitation of concentrates from froth produced by the use of known flotation agents is effected by the addition of carbon, or the carbon may be added to the flotation agents to prevent the passage of gangues and heavy ores into the froth. Lead glance, zinc blende, copper pyrites, &c., may be floated in the usual way and different kinds of carbon, particularly "active carbons," added to expel the ore from the froth.  In an example 0,006 gms. of norite or 0,009 gms. of carboraffin are added to a froth produced by floating 10 gms. of lead glance with 0,6 c.c. of an oleic acid emulsion of 0,03 per cent oleic acid and 60 c.c. of 0,5 per cent isoamyl alcohol solution.  It is stated that fractional precipitation of a mixture of ores in a froth may be effected by additions of different quantities of carbon. An example of adding carbon to the flotation agent comprises the addition of 3 mgms. standard norite when treating a mixture of 4 gms. lead glance with 4 gms. quartz gangue.
Patent GB-527346-A (GB)
Title: Improvements in apparatus for projecting granular material
IPC: B24C5/02
Filed: 1939-04-06
Abstract: 527,346. Sand-blast; foundry moulding- machines. JACOBOVICS, J. April 6, 1939, No. 10824. Convention date, April 12, 1938. [Class 60] [Also in Group XXII] Apparatus for sand-blasting or the projection of moulding sand, cement &c. comprises a fixed tube 28 which supports a hollow rotary head 25, provided with a nozzle or nozzles 27, inclined to the axis of rotation to discharge material under centrifugal force, carried by a rigid driven tube 24, the tube 28 conveying the sand to the head 25. The nozzles may be integral with the head and have their outer walls thickened or have an abrasion resistant lining secured to the head by a screwed sleeve. The tubular body 24 is rotatably mounted by ball bearings 30 on the horizontal tube 28, through which the sand is propelled by compressed air. The body also is supported at its end 31 on a sleeve 32 spaced from and secured to the tube 28, a packing 40 preventing leakage of air. Compressed air is supplied by an inlet 36 and through the space 37 to a chamber 38 in the tube 24 the air then escaping through tangential nozzles 39 and thus causing the body to rotate rapidly ; air also passes through ports 42 to keep the bearing 30 and the space 41 clear of sand. Any other form of air motor may be employed to drive the tube 24, and the head may have a single nozzle thereon balanced by a projection of the head. The air drive, described above, may be replaced by a flexible shaft drive acting through gearing located in a casing surrounding the tubes 24, 28. In a further modification the head is driven by an electric motor of which the stator with its commutator is mounted on the fixed horizontal tube 28, and the rotor with the brushes on the driven tube 24. In both these modifications air is supplied to cool the motor and to keep the bearings &c. free of sand. In order to avoid the use of separate blowers for supplying the sand, the apparatus shown in Fig. 6 may be used, wherein air is supplied to aT-joint 91, some passing to the space 90 between the sand delivery tube 87 and the sleeve 88 and the remainder passing to an injector nozzle 95 which draws sand from an extension 94 of the tube 87. The Specification as open to inspection under Sect. 91 comprises also a machine in which the head is attached to the bottom of a vertical driven tube supplied with sand &c. at its upper end. This subject-matter does not appear in the Specification as accepted.
Patent GB-393981-A (GB)
Title: Improvements in or relating to pneumatic separators
IPC: B07B7/08
Filed: 1931-11-16
Abstract: 393,981. Pneumatic separating. RAW, G., Ravenswood, Low Fell, Co. Durham. Nov. 16, 1931, No. 10828/33. Divided on 393,970. [Class 117.] In apparatus for the pneumatic separating of solid materials, means provided for preventing the discharge of dust into the atmosphere consist in circulating the air in a closed circuit including a fan b for supplying the air, preferably through pulsator valves c<1> as described in Specification 305,068, [Class 117, Sifting &c.], to the air-chamber c of a table a such as described in Specification 297,757, [Class 117, Sifting &c.], a hood d, pipe f and dust collector t by which the air is withdrawn from the table and partially cleaned, and a shunt i, dust collector j and, preferably, a fan k by which part of the air is cleaned and discharged to the atmosphere. The fresh air necessary to make up the shunted part is admitted through the openings a<3> at the feed point and the regulable inspection openings h near the table and the opening n leading to the return pipe f. In an alternative construction, a third fan may be utilized in the return part of the pipe f to assist in drawing the air from the hood d. The dust-laden air from the peripheral part of this fan is passed through the shunt. Liquid atomizing devices e such as described in Specifications 336,221, [Class 117, Sifting &c.], and 393,970 may be mounted in the hood d. Specification 274,587, [Class 117, Sifting &c.], is referred to in the Provisional Specification.
Patent GB-1389341-A (GB)
Title: Control system for conveying apparatus
IPC: H02M9/00
Filed: 1972-03-09
Abstract: 1389341 Automatic control OMF HOLDING CALIFORNIA Inc 9 March 1972 [10 March 1971] 10953/72 Heading G3N A plurality of work carriages are sequenced along a pre-selected path between treatment stations in accordance with a stored programme on a coded tape, sequenced unidirectionally, in response to the outputs of moving devices  mounted on the carriages detecting coded devices disposed at intervals along the path of the carriages. As shown, Fig. 1, an electro-chemical plating apparatus 50 has a hoist carriage 52 movable on rails 54, 56 supported on frames 58. The carriage is traversed by a reversible motor 57. The position and identity of a work station is indicated by a coded address module 60, 62, 64 which is served by a plurality of micro-switches in a rail 68 moved with the carriage. A plating barrel 80 is supported by arms 76, 78 and raised and lowered by a twospeed motor through a pulley and cable system. A coded address module, Fig. 2, comprises a base plate 110 which is adjustably mounted on the rail 54, Fig. 1, by clamping members 150. The base plate supports binary-coded-decimal strips 112-114 which are served, within travel limits set by auxiliary stop blocks 136, 138, through an ambiguity timer, not shown, accessed by a tape code. The coded strips are offset to facilitate reading by roller actuated micro-switches of an assembly 164 mounted on a base member 160 on the channel member 68 of the carriage. The electronic control system employs logic responsive to tape commands to effect a sequence of movements in determined direction of a carriage and subsequent homing of the tape to a sequencestart position.
Patent GB-668992-A (GB)
Title: Continuous change speed gear
IPC: F16H15/38
Filed: 1950-05-03
Abstract: 668,992. Variable-speed gearing. GARNIER, H. L. May 3, 1950 [May 23, 1949], No. 10956/50. Class 80 (ii). In friction gearing in which the speed from a curved drum 1 or 2 on the .driving shaft is transmitted at a variable ratio to a similar drum on a co-axial shaft by means of two rollers 3, 4 on pivots 6, the angular position of which can be varied in relation to the axis of the gear, the pivots 6 are mounted on spindles 7 which at one end 8 are rotatably mounted in spherical bearings 10 in a fixed wall 11 of the casing and carry intermeshing gear segments 14 for adjusting their angular position and at their other ends 9 are rotatably mounted in spherical bearings 12 in a member 13 which is supported in a guide 25 for both swinging and sliding movement. The rollers 3, 4 can thus move bodily in two directions to centralise themselves and ensure a constant pressure on the driving and driven drums despite any inaccuracies in manufacture and assembly of the parts. The drums 1 are free on their shafts but coupled thereto by balls 19 engaging in conical recesses 20, 21 in the drums 1 and discs 22 respectively which arrangement provides an increase in pressure between the drums and rollers proportional to the torque transmitted in addition to the loading of springs 23..Pins 16 on the segments 14 are adapted to be engaged by a sliding member 24 to control the gear.
Patent GB-1517311-A (GB)
Title: Power assisted wheelchairs
IPC: A61G5/04
Filed: 1976-03-17
Abstract: 1517311 Wheelchairs E W SHUTTLEWORTH 17 March 1976 [17 March 1975] 11018/75 Heading B7H Electric drive means for a wheelchair comprises a battery support platform 4 attachable to the chair and pivotally supporting a frame member 19 carrying an electric motor 3, drive transmission 22 and a driven ground wheel 1. Batteries 8 carried by the platform 4 are connected to the motor 3 via a main on/off switch box 26 and a switch 9 located on the handle (10) Fig. 1 (not shown). The platform 4 is connected to the chair frame by means of lugs 14 as shown. A manual lever 24 welded to frame 19 incorporates a spring catch (not shown) operable to lift the wheel 1 clear of the ground. A battery charging element may be incorporated in box 26. In a modification (not shown) the support platform comprises a plastics moulding, similar to platform 4, supported in a metal tube cradle attached to the wheel chair.