baber/WOPTO huggingface dataset:
Patent GB-1487049-A (GB)
Title: Uninterruptable power supply
IPC: H02J9/06
Filed: 1976-04-21
Abstract: 1487049 Uninterruptable power supplies WESTERN ELECTRIC CO Inc 21 April 1976 [24 April 1975] 16216/76 Heading H2H An uninterruptable power supply comprises first and second power sources connected to terminals 13, 14 and 15, 16 respectively, voltage sensors 17, 18 for monitoring the voltage of the first source, an oscillator 25 coupled to the second source and circuitry including a switch 21 for selectively controlling the transfer of power from the first and second sources to output terminals 11, 12, the circuitry enabling the phase of the oscillator output to be aligned with the signal at the output terminals 11, 12 when the voltage of the first source has a first value and to be aligned with the first source when this source voltage has a second value. The first source is a mains supply and when it has its normal value, the sensor 18 causes a light emitting diode to trigger reverse parallel light activated thyristors in a gate 20. A load connected to the output terminals 11, 12 is therefore supplied with power via a transformer having a saturable core 56 and isolating magnetic shunts 50-53. The sensor 18 also supplies a signal to the switch 21 such as a semi-conductor bilateral switch arrangement to connect the output of a phase detector 28 to the oscillator 25. The detector 28 detects the zero crossings of the output signal at the terminals 11, 12 and constrains the oscillator to operate in phase with this signal. The oscillator controls an inverter 30, the output of which is in phase with the output signal at the terminals 11, 12 so that the inverter does not consume power from the second source such as a battery connected to the terminals 15, 16. If the voltage of the first source falls by 10 to 15%, the sensor 17 controls the switch 21 to connect a phase detector 19 to the oscillator 25 which is thus constrained to operate in phase with the first source. The power supplied to the load is therefore shared between the first source and the battery driven inverter. A further fall in the voltage of the first source is detected by the sensor 18 which controls the switch 21 to disconnect the oscillator 25 from the detectors 19, 28. The thyristors in the gate 20 are not triggered and the inverter 30 runs freely to supply all the power to the load. A circuit 24 monitors the battery voltage and inhibits operation of the inverter if the battery voltage falls below a predetermined level. When the first source voltage returns to normal, the thyristors in the gate 20 are triggered and the oscillator operates in phase with the output voltage at the terminals 11, 12.
Patent GB-652122-A (GB)
Title: Phase control apparatus especially for television synchronization
IPC: H04N5/12
Filed: 1948-06-16
Abstract: 652,122. Automatic frequency and phase control systems. RADIO CORPORATION OF AMERICA. June 16, 1948, No. 16224. Convention date, June 24, 1947. [Class 38 (iv)] The frequency and phase of a television scanning oscillator are brought into agreement with received synchronizing pulses by deriving two control voltages, one of which is produced by mixing and rectifying the resultant, and the second produced by differentiating the first control voltage, both control voltages being used to adjust the frequency of the oscillator. In Fig. 1 the scanning saw-tooth oscillator T5 is triggered by a blocking-oscillator T4, the frequency of which is dependent on the bias on its grid. The saw-tooth waves from T5 are fed at a to the mid-point of a transformer secondary, whose primary is fed with the incoming synchronizing pulses b. The resultant waves at c and d respectively are of the form shown at c, d in Fig. 2, and are fed to oppositelypoled diodes T1, T2, giving beat waves of the form shown at e, g across the load resistors R1 R2. The mean of these, shown at f, constitutes the first control voltage, and is applied to the grid of an amplifier T3, the anode circuit of which is connected through a filter circuit C3, R6, C13 and resistors R7, R18 to the grid of the oscillator T4, thus tending to lock-in the frequency of this oscillator with that of the input pulses. From the anode of T3, a connection is made through a filter R9, C4, C5 and a differentiating network C6, R10 to the grid of an amplifier T6, thus producing at h in the anode circuit a series of short pulses h, Fig. 2, which are of positive polarity if the saw-tooth waves are of lower frequency than the synchronizing pulses, and of negative polarity in the other event. These pulses are passed to oppositely-poled rectifiers T7, T8 and the mean of their output is taken at the junction of resistors R13, R14 and is passed through a smoothing filter R15, C8, C9 and a resistor R22 to the grid of the valve T4, thus providing for the oscillator a second control voltage, the sign of which is dependent on whether the oscillator is running too fast or too slow. The voltages on the anode of the valve T3 may be passed through a filter R17, C16 and a resistor R21 to the grid of the valve T4, thus providing a third control voltage similar to the first, but operating more sluggishly and with less liability to noise interference owing to more effective filtering. Specification 562,513 is referred to.
Patent GB-1280574-A (GB)
Title: Valving arrangement
IPC: F16K31/08
Filed: 1970-04-06
Abstract: 1280574 Valves PITNEY-BOWES Ltd 6 April 1970 [16 April 1969] 16254/70 Heading F2V Control of flow between an inlet 14 and an outlet 13 is effected by means of a valve which inhibits contamination of the flow, is capable of changing its state in a time of one or two milliseconds, and which comprises a ferromagnetic plate 17 anchored in position by a cap 26, a magnetized flanged plate 21 which carries a resilient sealing member 23 and which has its flange 22 formed with an arcuate surface 24, and a permanent magnet 44 which is retained in a carrier 36 biased by a spring 42 in a direction away from the valve body 10. With the magnetic poles of plate 21 being at N 1  and S 1  and those of permanent magnet 44 at N 2  and S 2 , the valve flow path is closed when the permanent magnet is in a position most remote from the valve body 10, such position being determined by a circlip 43 on the carrier 36. Upon this permanent magnet 44 being moved towards the valve body 10, plate 21 is caused to tilt about a portion of its arcuate surface 24 to so open the flow path through the valve (Fig. 4, not shown). Plate 21 is maintained centralized relative to the outlet 13 in all operative state of the valve by means of a projection 31 which is formed on the cap 26 and which co-operates with an aperture 32 in the plate 21.
Patent GB-164739-A (GB)
Title: Improvements in small arms and machine guns
IPC: F41A35/00
Filed: 1920-05-17
Abstract: 164,739. Berthier, A. V. P. M. Nov. 20, 1918, [Convention date]. Machine guns.-The ejection and loading openings are both provided with covers which are so connected that the cover for the loading opening is locked until the cover for the ejection opening is withdrawn. In a modification, the ejection opening cover is withdrawn by the cocking-slide. In the construction shown in Fig. 1, the loading opening which normally receives the magazine, is closed when the magazine is removed, by a hinged cover 2 and the ejection opening at the side of the breech-body is closed by a sliding cover 18. The sliding cover 18 is adapted to lock the hinged cover 2 by engaging a depending arm 32, so that the gun cannot be loaded while the injection opening is closed. In a modification, Fig. 4, the cover 18 is retracted by a lug 38 on the cocking-slide.
Patent GB-1343472-A (GB)
Title: Method for producing concentrated nitric acid
IPC: C01B21/26
Filed: 1971-05-21
Abstract: 1343472 Nitric acid SUMITOMO CHEMICAL CO Ltd 21 May 1971 [27 May 1970] 16361/71 Heading C1A 80-90% by wt. HNO 3  is prepared by (a) reacting together HNO 3  of concentration less than 80% by wt., N 2 O 4  and air at a pressure of of 3-10 atm. and a temperature of 20-70 C. Nitrogen oxides (e.g. NO and NO 2  derived from NH 3  oxidation) are introduced via 1, are mixed with O 2 -containing unabsorbed gases from a reactor exhaust gas scrubber 17, and the mixture fed to an absorption tower 2 where NO is oxidized into N 2 O 4 . The top of tower 2 is also fed via 4 with part of the concentrated HNO 3  product and the resulting N 2 O 4 -containing HNO 3  is fed from the bottom of the tower via 5 to the top of s stripping tower 6 also fed with N 2 O 4 -containing concentrated HNO 3  from the reactor 12 via 9 and with feed air via 8. 80- 90% by wt. HNO 3  is withdrawn from the tower 6 whilst N 2 O 4 -containing feed air withdrawn from the top of tower 6 is fed via 11 to the reactor 12 also fed with HNO 3  of concentration less than 80% by wt. via 14. N 2 O 4 -containing HNO 3  from the reactor 12 is fed via 9 to the stripping tower 6 whilst exhaust gas fed via 16 to scrubber 17 also fed with less than 80% by wt. HNO 3  via 18. The less than 80% by wt. HNO 3  withdrawn from the bottom of scrubber 17 is recycled to the reactor 12 whilst O 2 - containing unabsorbed gas is added to the nitrogen oxide feed via 20.
Patent GB-1345548-A (GB)
Title: Method of and apparatus for the compression moulding of thermosetting plastics materials
IPC: B29C48/03
Filed: 1971-05-21
Abstract: 1345548 Compression moulding of plastics material PENNWALT CORP 21 May 1971 [10 June 1970] 16367/71 Heading B5A In a method of compression moulding thermosetting plastics material, a predetermined charge of the material is heat extruded from a screw extruder 50, Fig. 5, and is formed into a blank 100 in a cup 70 which is then removed from abutment with the extruder whilst the blank is held by a finger 71. On complete separation of the cup and finger from the blank a reciprocatory blade 106 shears the blank from the extruder, and the blank falls down a shoot D, Fig. 3, to a mould cavity 28A where it is compression moulded. Three such extruders with their material receiving cups are arranged side-by-side and are supplied with resin powder from a common hopper 52, Fig. 1. The extruders separately supply shoots 110, 112, 114 delivering the blanks to mould cavities, 28A, 28B, 28C in a heated mould plate 28. The cups are carried by a first bar reciprocated by hydraulic cylinders, and the three holding fingers are attached to a second bar parallel to and movable relative the first. The cups are cooled between successive operations by air jets. The shoots are attached to a carriage 116 mounted in a frame 122, the carriage being reciprocable by a pneumatic cylinder 130 to bring the shoot discharge ends into and away from proximity with the mould cavities. On reception of the blanks into the cavities an upper heated mould plate 34 with three compression plungers is lowered by an hydraulic cylinder 20 to form the desired articles, such as radio knobs, which are removed from the plate 34, on opening the press by ejector pins 36 extending downwardly from a plate 38. The articles are finally discharged through a conduit 40 by an air blast from tubes 134, 136, Fig. 3, supplied with compressed air from a manifold 132 on the carriage 116. Such blast also removes flash.
Patent GB-203783-A (GB)
Title: Improvements in and relating to spring tyres for motor and other road vehicles
IPC: B60C7/14
Filed: 1922-06-13
Abstract: 203,783. Drabble, H. June 13, 1922. S p r i n g wheels. - Closely arranged double-S springs 12 are bolted &c. to an outer rim 3 and the wheel rim 1 and enclosed by telescoping flanges 6, 8 secured to the rims. The flangeplates 8 are shown secured to tongues 9 struck-up from the rim 1. A rubber &c. tread 5 is fitted to the rim 3.
Patent GB-402822-A (GB)
Title: Improvements in or relating to stop motions for circular looms
IPC: D03D37/00
Filed: 1932-06-10
Abstract: 402,822. Weft stop-motions for circular looms. BRITISH CELANESE, Ltd., 22, Hanover Square, London, and HOWARTH, W., c /o British Celanese, Ltd., Spondon, near Derby. June 10, 1932, No. 16395. [Classes 142 (i) and 142 (ii).] A stop-motion device for use particularly in circular looms in which the warps rotate, comprises a weft feeler which is pivotally mounted on the shuttle and is adapted on weft breakage or slackening to bring to an end relative circular motion between the warps and the weft inserting means. The invention is described in connection with looms of the type set out in Specifications 230,033 and 285,435, [both in Class 142 (ii), Looms, Kinds &c.], wherein stoppage is effected by movement of a ring 56 under control of warp detector mechanism comprising a feeler 15 and a horizontally slidable bar 18 carried by the shuttle. The weft 26, which is unwound from a spool 14 by a member 28, is passed between fixed and movable guides 32, 33 respectively and then led through a groove 30 to the base of the shuttle, the movable guide being urged against the weft and towards the fixed guide by a leaf spring 36. The guide 33 forms part of a pivoted bell crank lever 34 provided with a freely pivoted finger 39 which extends between two pins 44 on the lever 18 and normally bears against a pin 43 on the shuttle body. On breakage or slackening of the weft, the spring 36 rocks the bell crnak lever 34 and projects the finger 39 through the warps 40, the relative movement between the shuttle and the warps then causing the bar 18 to be moved into engagement with a finger 48 on an upright spindle 49. Rocking of the spindle 49 withdraws a latch 50 from the tip of a rod 51 and permits a spring urged shaft 53 to engage a pin 55 on the ring 56 and effect stoppage.
Patent GB-111158-A (GB)
Title: Improvements in Gear Trains.
Inventor: PARSONS CHARLES ALGERNON
IPC: F16H1/20
Filed: 1916-11-16
Abstract: 111,158. Parsons, Sir C. A., Cook, S. S., and Chapman, E. B. Nov 16, 1916. Toothed gearing.-In double, or multiple toothed reduction gearing, the forces acting on the gear wheels c, e on.' an intermediate shaft d tend, at certain loads, to raise this shaft in its bearings to the limit of the bearing clearance. In order that the shaft may rise evenly without tilting, a balance-weight h is placed upon it so as to cause the resultant of the forces on the gear teeth to act at the centre of gravity of the shaft. The weight h may be placed between the pinion e and the bearing k. There may be two driving-pinions b engaging diametrically opposite points of the wheel c.
Patent GB-239962-A (GB)
Title: Improvements in tool holders for lathes, drilling, milling and other machines
IPC: B23B29/12
Filed: 1924-07-09
Abstract: 239,962. Keetley, W. July 9, 1924, Turning ; sockets. - A tool-holder for use in a lathe, or in a drilling, milling or other machine carries means for sppporting a number of tools such as drills, milling - cutters, reamers, taps, cutter-bars &c. in such manner that they normally lie out of the operative position, but any one. may be swung into alignment with the work and locked there. The tools may be stationary or rotary. The stationary tools F may be mounted directly in sockets B or adaptors E may be used, the sockets being pivoted to lugs D on a central boss A secured to a lathe poppitspindle so that they may be swung individually to bring the tools into alignment with the boss A conical spigot G on each socket registers with a similar recess in the boss and is provided with a hole for engagement by a set-screw. When rotary tools are used the boss carries a rotatably mounted shaft for engagement with a drilling &c. machine spindle and the tools are mounted in rotary sleeves in the sockets, the sleeves being provided at one end with teeth which engage teeth on the shaft so as to be driven thereby. Rotation of the boss is prevented by a radial arm. The sockets B may be replaced by self-centreing chucks, or such chucks may be detachably mounted in the sockets.
Patent GB-1471586-A (GB)
Title: Fastening device
IPC: F16B13/06
Filed: 1974-04-16
Abstract: 1471586 Bolting; screw sockets A FISCHER 16 April 1974 [16 April 1973 2 May 1973] 16485/74 Heading F2H [Also in Division E1] To fasten a structural or facing member 13 to a wall 8 so that the spacing between them can be adjusted, a device 1 is used which comprises an anchoring portion including expansible means for anchoring the device in a bore 5 in the wall, a shank portion 4b to extend outwardly from the bore and having an end face 4c defined by a shoulder against which the expansible means is supported, a first stop means adjustably mounted on the shank portion, and a second stop means adjustably mounted on or in the first stop means whereby the member 13 can be gripped between the two stop means at an adjustable spacing from the wall. As shown the first stop means is the head of an internallythreaded sleeve engaging a thread on the shank portion 4b, and the second stop means is a nut 23 engaging an external thread of the sleeve. Alternatively, as in Fig. 2 (not shown), the first stop means may be a headless sleeve (11<SP>1</SP>) having internal threads to engage both a thread on the shank portion 4b and a thread on a bolt (14) constituting the second stop means. The expansible means comprises a coil spring 2 surrounded a reduced diameter threaded member 4a formed as an extension of the shank portion 4b, the spring 2 being expanded in use by frusto-conical expansion elements 3. A plastics cap 9 may retain the end of the spring 2 adjacent the shoulder 4c.
Patent GB-558938-A (GB)
Title: Improvements in men's underwear
IPC: A41B9/06
Filed: 1942-11-23
Abstract: 558,938. Men's vests. BENJAMIN, A. Nov. 23, 1942, No. 16535. [Class 141] A man's vest c is formed with a cut away portion a extending upwards from the centre portion of the bottom edge b of the front portion only. Specification 522,069 is referred to.
Patent GB-1038005-A (GB)
Title: Purification of p-aminophenol
Inventor: SEDDON JOHN DAVID
IPC: C07C215/76
Filed: 1964-04-22
Abstract: In a process for crystallizing p-aminophenol from solution the crystallization is conducted in the presence of the sodium salt of ethylene diamine tetra-acetic acid.  During the crystallisation a reducing agent such as sodium hydrosulphite or sodium sulphite may be added.  In an example p-aminophenol, sodium sulphite, sodium hydrosulphite, ethylenediamine tetraacetic acid sodium salt, decolorising carbon and water are heated in a nitrogen atmosphere under reflux.  The solution is filtered, further sodium hydrosulphite is added and the p-aminophenol allowed to crystallize.
Patent GB-982852-A (GB)
Title: Improvements in grain threshing and separating machinery
IPC: A01F12/18
Filed: 1962-05-02
Abstract: 982,852. Combine-harvesters. MASSEY-FERGUSON SERVICES N.V. May 2, 1962 [May 10, 1961], No. 16786/62. Heading A1F. A combine-harvester comprises, in combination, a grain-cleaning and separating unit 17 including a straw-rack 18 and sieves 21, means 32 for collecting the tailings which sift through the straw-rack and overflow from the sieves, a re-threshing chamber 33 located adjacent to the unit 17, a passageway 53 connecting the chamber and the unit, an elevator 34 arranged to lift the collected tailings to the re-threshing chamber and a plurality of rotating blades 48 disposed in the chamber for rubbing the tailings against a roughened wall 47 of the chamber and for imparting sufficient impetus to them to project them through the passageway and across the cleaning and separating unit. The collecting means comprises an auger 35 extending from beneath the sieves 21, through an extension-tube 27a to the elevator housing 34 which includes a vertical auger 41 driven at higher speed, through gearing 79, from the auger-shaft 36. The upper end of the vertical augershaft 43 carries the blades 48 which are rearwardly bent at their outer ends and fitted with rubbing bars 52 which cooperate with the frusto-conical wall 47. The wall can be raised and lowered relatively to the bars 52 to accommodate different grain-sizes and may also be covered by a smooth insert (Fig. 7, not shown) when re-threshing is not required. The combine has the usual grain-elevator 31, grain-tank 24, and straw-scattering flail 25.
Patent GB-649059-A (GB)
Title: Improvements in or relating to apparatus for screening or shielding thermionic valves and the like
Inventor: FAUDELL CHARLES LESLIE
IPC: H01J5/12
Filed: 1948-06-23
Abstract: 649,059. Radio receiving apparatus. ELECTRIC & MUSICAL INDUSTRIES, Ltd. June 23, 1948, No. 16807. [Class 40 (v)] A shield or screen for a thermionic valve or the like is provided with an internal spring and is removably held in position on the chassis by means of elements which engage in the manner of a bayonet joint with co-operating elements on the chassis integral with and formed from the material of the chassis. As shown, the tubular screen 6 is provided with outwardly-directed lugs 7 at diametrically opposite points which co-operate with the undercut portion of L-shaped arms 4, to form a bayonet joint, the arms 4 being pressed up from the chassis at right-angles to the plane of the chassis. A spring 8 engaging the valve retains the screen in position.
Patent GB-440474-A (GB)
Title: Improvements in or relating to the production of modulated high-frequency electric currents
IPC: H03C1/52
Filed: 1935-06-11
Abstract: 440,474. Modulating systems. KRAWINKEL, G., 25, Bothstrasse, Lichterfelde, Berlin. June 11, 1935, No. 16846. Convention date, June 11, 1934. [Class 40 (v)] A modulating system particularly intended for television transmission, and designed to prevent the modulating signal from appearing in the output circuit, comprises a pair of valves R1, R2 biassed back beyond the bottom bend of their characteristics, and fed in pushpull from the carrier source S, the modulating signal M being fed in phase agreement. Each valve in turn passes a pulse of carrier current through its plate resistance A1, A2. One of these is connected as the input of a phasereversing valve R3 which works on a straight part of its characteristic, and has a resistance A3 in its plate circuit. The voltages across the resistances A1, A3 are combined in the coil T from which the modulated carrier current is taken.
Patent GB-701844-A (GB)
Title: Improved means for detecting disturbed flow over aircraft surfaces or for stall warning
Inventor: GRINSTED FRANK
IPC: B64D45/00
Filed: 1951-07-16
Abstract: 701,844. Disturbed airflow indicator for aircraft. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Sept. 24, 1952 [July 16, 1951 No. 16873/51. Class 4 An arrangement for detecting disturbed or turbulent airflow over the surfaces of an aircraft comprises a pivotally mounted vane or the like exposed to the airflow, and means responsive to the shaking movement of the vane when in disturbed airflow, which means gives an indication to the pilot. Referring to Fig. 3, the vane 1a is mounted on an axis 2, which may be parallel to the aircraft axes of roll, pitch, or yaw, on a wing or any other suitable place, and controls the slider 5 of an arcuate potentiometer 6. The vane is lightly biased to the central position by springs 4. Deviation of the slider from the central position upsets the balance of a symmetrical electrical circuit so that the armature 9 is differentially influenced by electromagnets 7 and 8. The armature is coupled to the pilot's control stick, and thus gives an indication by way of shaking. The arrangement may be used for giving warning of an impending stall.