baber/WOPTO huggingface dataset:
Patent GB-284623-A (GB)
Title: Improvements in or relating to the evacuation of closed vessels
IPC: H01J9/385
Filed: 1928-01-27
Abstract: 284,623. Westinghouse Lamp Co., (Assignees of Rentschler, H. C.). Feb. 1, 1927, [Convention date]. Vacuum tubes; R÷ntgen-ray tubes: high vacua, obtaining and maintaining.-Vessels containing electrically conducting parts, for example, electric discharge devices, are evacuated by a process impressing high-potential, high-frequency alternating potential differences between the conducting parts. Gases are thus driven out from these parts and particularly from lead-in wires, electrode supports and other parts which are close to the envelope and not adequately freed from gas in the usual heat treatment. High-vacuum discharge tubes operating at several hundred thousand volts, X-ray tubes and discharge lamps and rectifiers filled with rare gas are referred to. In evaporating a tube containing a cathode 3 and cylindrical anode 2, pumps connected to the tube 15 are operated to obtain a high vacuum, the bulb 1 being heated, and current passed through the cathode 3, to drive off gas from these parts. Switches 20, 25 in connection with a high-frequency transformer 16 are then closed, the highfrequency discharge tending to take the longest path in the bulb 1 and producing vigorous sparking without much heat and gases in metal parts near the bulb 1 being drawn out by the electrostatic field. When sparking ceases, the electrodes are heated to a high temperature by highfrequency induction or electron bombardment to drive out residual gases and vaporize a getter 14 of aluminium; for instance, a switch 23 in series with a direct-current generator 22, of voltage above the normal operating voltage of the discharge device, is closed and, after the anode has been thus freed from gas, the discharge is increased to vaporize the getter. The switch 23 and the switch 24 in the filament-heating circuit are then opened and a further high-frequency discharge is preferably passed between the electrodes before sealing the bulb 1 off from the pump. The cathode 3 and anode 2 may be supported from opposite ends of the bulb 1, the anode being connected to a lead-in wire 7 by a cross bar 8. The aluminium absorbs hydrogen and other gases and may be originally secured to the anode by welding or by inserting under a struck-out strap. The voltage of the high-frequency discharge is several times the operating voltage of the tube, for example 25,000 to 50,000 volts for a 10,000 volt tube and 150,000 to 200,000 volts for a 100,000 volt tube. The frequency may be 20,000 to 500,000 cycles per second. Specification 211.480 is referred to.
Patent GB-712932-A (GB)
Title: Improvements in or relating to devices for indicating whether the mechanism of pendulum clocks is set to function correctly
IPC: G04B18/04
Filed: 1952-02-01
Abstract: 712,932. Clocks. STOCKALL, MARPLES & CO., Ltd., and STOCKALL. J. J. Jan. 22, 1953 [Feb. 1, 1952], No. 2803/52. Class 139 A device for indicating whether the mechanism of a pendulum clock is set to function correctly (i.e., "in beat") comprises an indicator 6, 8 which is secured to the pallet staff 2 and is visible so that it can be compared with a datum 5, 7 provided on or constituted by a stationary part of the clock adjacent to the indicator so that the position of the indicator with respect to the datum gives the desired indication.
Patent GB-410720-A (GB)
Title: Improvements in centrifugal supercharging devices for aircraft engines
IPC: F02B33/00
Filed: 1934-01-26
Abstract: 410,720. Centrifugal compressors. AVIONS, H. M. D. FARMAN, 149, Rue de Silly, Billancourt, Seine, France. Jan. 26, 1934, No. 2811. Convention date, Jan. 26, 1933. [Class 110 (i).] Additional impellers can be coupled at will to the main shaft of a compressor for supercharging aircraft engines. The impeller 2 is mounted on a shaft 15 which is connected to the main shaft by a centrifugal clutch 24. The clutch comprises a plate 33 fixed to the shaft, a member 46, 47 loose on the shaft, and friction discs 35, 36. Spring pressed pivoted weights 48 couple together the plate 33 and the discs 34, 35 and the member 46, 47 is driven by lugs 40. The weights 48 are disengaged by a clutch lever 55 and thrust bearing 50. The impeller 1 is permanently coupled to the main shaft by a centrifugal clutch 23. The clutch lever 55 controls a valve 13 by which the suction of the impeller 1 is directly connected to the atmosphere when the impeller 2 is not in operation and the clutch may be controlled by an aneroid. Speed changing means may be introduced.
Patent GB-305034-A (GB)
Title: Improvements in and relating to variable speed gear mechanism, particularly for use in motor driven vehicles
IPC: F16H29/22
Filed: 1929-01-28
Abstract: 305,034. Zahnradfabrik Akt.-Ges. Jan. 26, 1928, [Convention date]. Variable-speed gearing suitable for vehicles comprises ratchets driven from an eccentric, the throw of which, and therefore the speed ratio, depends jointly on the revolutions and on the load resistance. The driving part of the eccentric is a circular groove 4 engaged by oscillators 5 which drive in one direction through one-way devices 7. The eccentric 8 in which groove 4 is formed is supported near one rim on a pivot bolt 9 secured to a driving fly-wheel 10. A spring 12 normally maintains the eccentric in idle central position abutting against a stop pin 11. The eccentric annulus 8 carries an unbalanced mass 8<1> which is responsive to revolutions so as to produce a swinging about bolt 9, and a consequent effective throw. This swinging is resisted by the reaction of the oscillators so that the resultant throw is a joint function. The Specification as open to inspection under Sect: 91 (3) (a) comprises an alternative arrangement in which the eccentric comprises an inner eccentric and an outer eccentric, the latter being turned upon the former automatically bv an unbalanced centrifugal mass. This subject-matter does not appear in the Specification as accepted.
Patent GB-176592-A (GB)
Title: A temporary binder for music or double leaf papers and the like
IPC: B42F11/02
Filed: 1921-01-22
Abstract: 176,592. West, J. W. Jan. 22, 1921. Fold-engaging files; covers. - Relates to a filing-device of the kind wherein doubled sheets are bound by means of strings positioned in the folds of the sheets and stretched across a rigid back bar to which are hinged the covers. The back bar comprises two half-round members d, h, of different diameters, the larger member d being hinged to the covers a by a flexible strip b. The smaller member h is mounted upon the larger one, their flat surfaces being secured together, and the smaller member may also be secured to the covers by a flexible hinge-piece e. An arcuate straining-bridge j is provided, and has a leather facing, or the straining-bridge may be notched. Pins m situated in recesses l in the ends of the member h are provided, a continuous length of string k being wound around the pins and across the straining-bridges, the pins being afterwards bent downwards into the recesses. End fittings n are secured to the member d and are shaped to engage over the bridge-pieces j.
Patent GB-819171-A (GB)
Title: Tufted fabric
IPC: D05C17/02
Filed: 1956-01-30
Abstract: 819,171. Sewing machines. AMERICAN VISCOSE CORPORATION. Jan. 30, 1956 [March 14, 1955], No. 2901/56. Class 112 [Also in Group IX] Tufted fabric is made by feeding to a tufting point a porous elastic web formed of elastic fibres in random distribution, such as the fabric described in Specification 794,725 [Group IX], forcing apart from one another the individual fibres of the web, and passing tufting yarns between the forced apart fibres, the tuft yarns being held in the web by permitting the stretched fabric to be released after tufting. The tufted web may be united to a base of cushioning material, preferably a thicker web of similar porous elastic material. The elastic fabric web 1 passes from a feed roller 2<SP>1</SP> past conventional tufting means A to a feed roller 6 which rotates faster than roller 2 in order to stretch the web in the longitudinal direction. The web is stretched in the lateral direction also, between rollers 2<SP>1</SP> and 6, by means 16. The tufted web is then permitted to relax in passing to a pair of rollers 8, 8<SP>1</SP> and is collected on a roller 9. The tufting needles are preferably of the "ball point" type and may be lubricated with water or with a mixture of water and a substance such as glycerine, ethylene glycol or diethylene glycol.
Patent GB-945143-A (GB)
Title: Improvements in or relating to stackable chairs
Inventor: HOWLAND ROBIN
IPC: A47C3/04
Filed: 1960-01-27
Abstract: 945,143. Stackable chairs. A. & F. HOWLAND (WYCOMBE) Ltd. Jan. 27, 1960, No. 2961/60. Heading A4W. A stackable chair comprises a seat 10, a pair of stands 15, 16, a banister 17, a top rail 18, a pair of back legs 11, 12 which when the chair is stacked on an identical chair are each disposed between a stand and the banister, and a pair of front legs 13, 14 connected to the back legs by stretchers 19, 20 joined by cross rods which when the chair is stacked rest upon the seat of the lower chair.
Patent GB-1113573-A (GB)
Title: Automatic sealer control
Inventor: BATE FRED
IPC: H05B3/00
Filed: 1966-01-22
Abstract: 1,113,573. Package sealing apparatus. INDUSTRIAL DEVELOPMENTS (PACKAGING) Ltd. 20 Jan., 1967 [22 Jan., 1966], No. 3012/66. Heading B8C. [Also in Division B5] In apparatus for heat sealing plastics film about an article, the duration of the application of a heat sealing element 4 to the film is limited by means automatically responsive to the attainment of a predetermined temperature by the element 4. At a pack forming station (not shown), the plastics film, e.g. polyvinylchloride or polyethylene, is drawn off from a roll and folded longitudinally to form two layers. One layer passes over and the other under a pack plate and the leading edges have been sealed by a previous sealing and severing operation. An article to be wrapped is placed on the plate and pushed into engagement with the fold and the sealed edge of the film. The pack is positioned on a sealing table 1, Fig. 1. A rectangular sealing frame 2 is pivoted by a handle 5 about an axis 3 so that two electrical resistance sealing wires 4 thereon engage the film to seal it along the open longitudinal edges of the film and to transversely seal and sever the film. The current is supplied to the wires 4 as soon as the frame 2 is closed. The temperature of one wire 4 is sensed by a pyrometer 9 which takes the form of thermistor 11, Fig. 2, resting on the head of a screw 12 fitted into a cap 13. The cap 13 is slidable vertically in a fixed cup 18 and is urged upwardly by a compression spring 20 so that the thermistor 11 firmly engages the wire 4. When the wire 4 reaches the required temperature the signal received from the thermistor 11 operates a solenoid (not shown) controlling a valve 10, Fig. 1, to retract a ram 7 of an hydraulic or pneumatic cylinder 8. A cranked lever 6 connected to the ram 7 lifts the frame 2 away from the table 1. The wrapping is then shrunk about the article in an oven (not shown). In a modification (not shown), the temperature sensing means operates on a part of the sealer adjacent to the wire 4. In another embodiment (not shown), the sensing device is operated by the expansion of the wire 4 which has secured to one end thereof an operating member which is spring urged towards a switch which it operates at the predetermined temperature. In a further embodiment, the sensing device comprises an electric voltmeter to measure the voltage drop across the wire as its resistance is increased due to the rise in temperature. In still further embodiments, the sensing device is responsive to the colour of the resistance wire 4 or to the emission of infra-red rays from it.
Patent GB-824764-A (GB)
Title: Improvements in side delivery rakes and/or swath turners and/or tedders
IPC: A01D78/00
Filed: 1955-02-02
Abstract: 824,764. Hay making machinery. BAMFORDS Ltd. Jan. 23, 1956 [Feb. 2, 1955], No. 3040 /55. Class 6(3). In order that it may be used for tedding purposes, a side delivery rake as described in Specification 802,201 is provided with an additional front wheel 20 mounted at the forward end of the shorter frame member 12, together with means for detachably mounting on each of the front wheels 19 and 20 a draw bar 24. For side raking purposes, the draw bar is mounted on the wheel 19 and the implement is drawn in the direction of the arrow 17, but for tedding purposes the connection is mounted on the wheel 20 and the implement is drawn in the direction of the arrow 30. As illustrated in Fig. 2, the draw bar 24 is mounted on, for example, the wheel 20, by providing a removable set screw connection between it and the lower forked end 28 of the wheel stem 26, the strap 29 of the draw bar being formed with a hole through which the upper end of the wheel stem passes. Alternatively the draw bar may be permanently fixed to one wheel 19 or 20 and the wheels themselves be removably mounted on the frame 10 so as to be interchangeable. In either case, when the direction of advancement of the machine is changed, it will be necessary to adjust the orientation of the rear wheels by means of the lever and quadrant mechanisms 23. Reference is made in the Provisional Specifications to 748,240, 748,259, 767,331 and 778,910 (cognate with Specification 802,201).
Patent GB-743661-A (GB)
Title: Improvements in or relating to foot-supporting devices for walking on muddy or marshy ground
Inventor: CLARKE JAMES HENRY
IPC: A43B7/32
Filed: 1953-02-03
Abstract: 743,661. Boots &C. ELLIOT EQUIPMENT, Ltd. April 5, 1954 [Feb. 3, 1953], No. 3044/53. Class 17 (2). [Also in Group XXXIII] A foot-supporting device for walking over muddy or marshy ground comprises a fabric-covered base-board 1 with a T-shaped keel 3 attached on one side and an inflatable buoyancy chamber 2, having shape supporting reeding 5, attached to the other side. The chamber 2 has a foot-receiving central aperture 4, and is held on the foot by a gaiter 8 and straps 10.
Patent GB-475613-A (GB)
Title: Improvements connected with auxiliary windings for three-phase transformers
IPC: H01F27/38
Filed: 1937-02-02
Abstract: 475,613. Transformers. SOC. SAVOISIENNE DE CONSTRUCTIONS, ELECTRIQUES. Feb. 2, 1937, No. 3083. Convention date, Feb. 15, 1936. [Class 38 (ii)] In a three-phase delta connected auxiliary winding E1 provided on a three-phase star connected transformer A, B, C, a, b, c or auto-transformer or in association with single-phase transformers forming a threephase group, one phase of the auxiliary winding includes all or part of one phase b of the principal windings.
Patent GB-785833-A (GB)
Title: Improvements in or relating to a method and apparatus for effecting transmissions oftelevision images
IPC: H04N7/01
Filed: 1954-02-02
Abstract: 785,833. Television. SOC. NOUVELLE DE L'OUTILLAGE R.B.V. ET DE LA RADIOINDUSTRIE. Feb. 2, 1954 [Feb. 4, 1953], No. 3094/54. Drawings to Specification. Class 40 (3). In an arrangement for transmitting comparatively high definition television signals over a channel (e.g. a narrow bandwidth cable) incapable of passing the corresponding bandwidth and such that images of the same definition may be reproduced at the receiving end of the channel, the original signals are first converted to signals requiring a transmission bandwidth which the channel can handle by scanning images reproduced from the former signals such that all the frames are scanned but some of the lines omitted the signals thus produced being transmitted over the channel and at the receiving end converted to corresponding (comparatively low) definition images which are then rescanned to produce signals of the original (comparatively high) definition by repeating the scanning of some of the lines of the low definition images. In the described embodiment interlaced images are reproduced from the original signals by means of a picture reproducing tube the screen of which is imaged on a picture signal generating tube operating at the same frame-scanning frequency but at a reduced line-scanning frequency determined by the bandwidth capabilities of the channel. At the receiving end of the channel, low definition images are reproduced by a picture reproducing tube, the light decay of which is sufficiently long to " hold " the lines of successive fields so that an image made up of the full number of lines equal to the high definition image is available for scanning by a further picture signal generating tube to generate the high definition signals. The high and low definition images may be reproduced as " photographic negatives " and to ensure even brilliance of the low definition image throughout the framescanning period the gain of the tube or of video amplifiers supplying the latter signals to the tube may be controlled to compensate for the effect of light decay at different parts of the tube screen. If the reproduced high definition signals are to be employed with receivers requiring a different number of lines to that utilized in the original high definition signal the scan line scanning rate of the further picture signal generating tube is arranged accordingly. Specifications 694,005, 776,764 and 784,856 are referred to.
Patent GB-279689-A (GB)
Title: Improvements in tuning apparatus for radio receivers
IPC: H03J5/24
Filed: 1927-02-03
Abstract: 279,689. Brandes Laboratories, Inc., (Assignees of Oakley, G. E. J., and Smith, K. G.). Dec. 2, 1926, [Convention date]. Tuning-apparatus, construction and control of; thermionic amplifiers and detectors. - Tuning-apparatus comprises a pair of inductance coils 5, 9 with their axes normal to one another and an independent inductance 10 normallv mounted there-between and adapted to be coupled to either of the coils 5 or 9. The coils 5, 9 are preferably supported by side members 22 which in addition provide the bearings for a shaft 26 carrying the coil 10. The coil 10 is preferably arranged to fit concentrically within each of the coils 5, 9. The circuit shown in Fig. 1 shows the application of the unit to a receiver, switches 6, 8 allowing either of the coils 5, 9 to be used.
Patent GB-812885-A (GB)
Title: Apparatus for charging accumulators
IPC: H02J7/26
Filed: 1958-01-30
Abstract: 812,885. Battery charging apparatus. UNTERNEHMUNGER DER EISENUND STAHLINDUSTRIE A.G. FUR. Jan. 30, 1958 [Jan. 31, 1957], No. 3131/58. Classes 35 and 38 (4). A battery 4 is charged from a generator 1, the exciting winding 5 of which is fed from an alternating current supply over one or more saturable reactors and a rectifier 7, each of the saturable reactors comprising an alternating current winding 8 and three premagnetizing windings 10, 11, 14, the winding 14 carrying the generator field current, the winding 11 carrying a constant current by virtue of the series barretter 12 and the winding 10 carrying a current proportional to the battery voltage, the magnetic fields of the windings 10, 14 being in opposition to that of the winding 11. Thus a high charging rate can be maintained until the battery 4 is almost fully charged when the impedance of the alternating current winding 8 rapidly increases to considerably reduce the generator excitation and thereby reduce the charging current. The generator 1 may be a three-phase alternator in which case the battery 4 is charged over a rectifier 2 and the field winding 5 is self-excited as shown in the Figure or alternatively the generator may be of the direct-current type having the field winding separately excited from an alternating current source, the rectifier 2 being unnecessary in this case.
Patent GB-602873-A (GB)
Title: Improvements in and relating to spraying device for divided solid materials
IPC: B05B7/14
Filed: 1945-02-07
Abstract: 602,873. Spray-producers. VOSE, E. W. Feb. 7, 1945, No. 3132. [Class 69 (iii)] [Also in Group XVII] A device for spraying granulated or other finely-divided solid material comprises a portable container 10 for the material, and a spray nozzle 19 having an injector tube 20 rigidly connected to it and journalled in a wall of the container, so that the nozzle and tube 20 may be moved about the axis of the tube for directing the spray. A motor driven or other supply of air may be provided. The injector tube 20 may have a bevelled exit 21 with the midpoint of the exit coinciding with the axis of the nozzle. The injector tube may be in threaded engagement with a bushing 18 disposed in the wall of the container, or a swivel joint may be provided between the container and tube. The stream of air may be delivered to the nozzle at a low pressure, e.g., from two ounces to five pounds per square inch, and a relief valve may be provided on the nozzle between the injector tube and the air supply.
Patent GB-979866-A (GB)
Title: Improvements in or relating to ceramic materials and to electrical capacitors comprising them
IPC: C04B35/468
Filed: 1963-01-25
Abstract: A robust alkaline earth metal titanate ceramic dielectric structure is formed by firing together a layer of resistivity less than 1000 ohm-cm. at 25 DEG  C., rendered semi-conducting by incorporation of 0.1-0.5% of an additive, e.g. a compound or mixture of compounds containing ions of V, Nb, La or other rare earth metals, U, W, Th, Bi, Sb or F, particularly Nb2O5, and an applied thin layer which is a dielectric due to the absence of additive.  Barium titanate may be ball-milled with distilled water, allowed to settle, the supernatant water removed, 5% methyl cellulose in water added to the slurry as binding agent, the mixture dried at 100 DEG C. for 3-4 hours. and the dried product broken up and sieved to 300-100 mesh.  The powder plus additive is compacted at 100 p.s.i. to form a disc, rod or tube.  The dielectric layer, 0.1-20 mil. thick, of barium titanate as prepared above, or of a mixture of alkaline earth metal titanates, with or without the addition of a zirconate or stannate, is applied to the intermediate body as a powder, slurry or slip, and the coated body is compressed under 10,000 p.s.i. and fired in air at 1218-1500 DEG  C. for 1/2 -2 hrs. to form a single integrated unit.  In one modification, two dielectric layers are applied to opposite surfaces of the intermediate body, or the dielectric layer may be sandwiched between semiconducting layers.  Capacitors are formed by applying suitable electrodes to the appropriate surfaces of the dielectric structures and stacks of capacitors may be made up.
Patent GB-703635-A (GB)
Title: Improvements relating to electrical contact springs
Inventor: LESLIE JOHN DOUGLAS
IPC: H01H1/50
Filed: 1951-02-09
Abstract: 703,635. Switch contacts; electromagnetic relays. SIEMENS BROS. & CO., Ltd. Feb. 8, 1952 [Feb. 9, 1951], No. 3246/51. Class 38(5) Contact bounce on impact, in an electromagnetic or other relay, of a contact spring 2 on a substantially rigid contact is reduced by a friction spring 4 secured to the spring 2, or to a part to which spring 2 is fixed, and bearing on spring 2 at 8 near the contact 3, the spring 4 being bent to form an elbow 9. The contact spring 2 may be similarly and oppositely bent to form an elbow 99, Fig. 2, and is secured to an armature 1 operable by a winding 18.