baber/WOPTO huggingface dataset:
Patent GB-1158874-A (GB)
Title: Improvements in or relating to Transmission Lines for Electromagnetic Wave Energy
IPC: H01J23/30
Filed: 1966-09-30
Abstract: 1,158,874. Travelling-wave tubes; attenuators. WESTERN ELECTRIC CO. Inc. 30 Sept., 1966 [20 Oct., 1965], No. 43729/66. Headings H1D and H1W. The slow-wave structure of a travelling-wave tube comprises an attenuating section consisting of a thin film of tantalum on the structure. The invention may be applied to a tube having a slow-wave helix supported by three longitudinal rods spaced at 120 degrees intervals and surrounded by a periodic magnetic focusing system. The thin film of tantalum extends over a short region of the helix and the rods and is applied by sputtering from a cylindrical electrode placed around the helix. The film is about 500 Š thick, and is tapered to provide matching.
Patent GB-1028008-A (GB)
Title: Improved magnetic recording and reproducing system
IPC: H04N5/782
Filed: 1964-10-27
Abstract: 1,028,008. Video recording and playback apparatus for producing fast and slow motion effects. AMPEX CORPORATION. Oct. 27, 1964 [Dec. 30, 1963], No. 43736/64. Heading G5R. Video signals are recorded and played on a longitudinal track on a magnetic tape 12 driven round a semicircular guide 29, the heads 33 and 34 being mounted on a drum 31 which rotates in the same direction as the tape and which is driven at a constant speed relative to the tape. The arrangement is such that during recording the heads move at twice the speed of the tape, and a head 33 records a complete frame in 180 degrees of rotation after which the head 34 is energized to record another complete frame, the head switching being synchronized with the frame synchronization pulses and occurring during an overlap period amounting to 2¢ degrees rotation of the drum 31. When recording, the horizontal and vertical synchronization signals are separated from the input signal supplied from unit 42 and used to control the speeds of motors 38 and 20 respectively. Motor 20 drives a capstan (not shown) feeding the tape, and motor 38 acts with motor 20 through gearing 40 to drive the drum 31 at a constant speed relative to the tape. The vertical synchronization signals control the head switching circuit 44, and the composite video signal is supplied to the heads through a one frame delay circuit 64 and an amplifier 65; the delay ensures that switching for each frame is in accordance with its own vertical synchronization pulse instead of that for the next frame. Variable speed playback. On playback the switch 59 is operated so that motor 20 may be driven at a desired speed faster or slower than that used in recording. The signal from the heads passes through the head switch 44 and amplifier/equalizer unit 79 to an output circuit 81 which may feed a monitor or a video recorder. Horizontal synchronizing pulses are separated in unit 83 and used to control the motor 38 and to control the head switching via a gate 88 which is opened only during the overlap period by photo-electric detection of marks 94 on a slip ring rotating with the drum 31. The playback process is illustrated in Fig. 5 for fast and slow motions, and for simplicity each frame is shown as including only 9 lines. Starting from the right, for fast motion the head 33 begins its first s@an two lines before a frame pulse and ends 5 lines after, when head 34 is switched in and begins 4 lines before a frame pulse and ends 3 lines after, and so on. Thus some of the recorded lines are not played back. For slow motion, head 33 starts 6 lines before a frame pulse and ends 5 lines after, when head 34 is switched in and so on; in this case some of the lines are played back twice. The system is stated to be applicable to standards conversion and to instrumentation recording. In the system described the tape is wound from reel to reel, but it is stated that endless tape or a drum may be used. The recording may be electrostatic instead of magnetic.
Patent GB-910933-A (GB)
Title: Process for the preparation of polyolefines
IPC: C08F10/00
Filed: 1960-12-20
Abstract: A process for preparing polyolefins comprises polymerizing at least one aliphatic a -monoolefin in an inert organic liquid vehicle or in an excess of liquid a -monoolefin and in the presence of chromium borohydride or molybdenum borohydride as sole catalyst.  Specified olefins are ethylene, propylene, butene-1, pentene-1, 3-methyl butene-1, 4-methyl pentene-1, 4-methyl hexene-1, 5-methyl hexene-1 and 4,4-dimethyl pentene-1. The vehicle may be propane, pentane, heptane, benzene, toluene, xylene, ethylbenzene, isopropylbenzene, ethyltoluene, n-propylbenzene, diethylbenzenes, alkyl naphthalenes, n-octane, isooctane, methylcyclohexane, tetrahydronaphthalene, decahydronaphthalene, trichloroethylene or chlorobenzene. Examples describe the polymerization of propylene in the presence of (1) chromium borohydride and (3) chromium borohydride and heptane; and (2) 3-methylbutene-1 in the presence of molybdenum borohydride.  The process may be effected batchwise or continuously, and catalyst residues may be removed from the product by treating with ethanol, alcoholic sodium hydroxide and water.  The product may be dissolved, e.g. in a hot mixture of xylene and 2-ethyl hexanol, and reprecipitated.  The products may be formed into plates, films, pipes, tubes, fibres and filaments, e.g. for making tyre cords, magnetic tape base and photographic film base.
Patent GB-439838-A (GB)
Abstract: 439,838. Typewriters &c. BURROUGHS ADDING MACHINE CO., 6071, 2nd Boulevard, Detroit, Michigan, U.S.A. July 14, 1934, No. 20697. Convention date, July 15, 1933. [Class 100 (iv)] [See also Group XIX] Line.-spacing mechanim.-In a printing calculating machine means are provided for automatically controlling the non-add, total-taking, and line-spacing operations in dependence on the line-space position of the record sheet. The invention is described as applied to a Burroughs machine of the portable type; the record sheet is carried on a platen 17 Figs. 1 and 4, supported in a carriage 19 and the platen is rotated step by step for linespacing by a pawl 39 on an arm 37, operatively connected to the driving plate 22 on the main shaft, co-operating with a ratchet wheel 41 on the platen. Attached to the platen shaft is a cam 51 with which engages a roller 52 on one arm of a bell-crank lever 53, the other arm of which is connected to a lever 57 having a forked end engaging a pin 59 on a lever 61. The lever 61 is formed with a depending cam 63 adapted to engage a pin on a dog 66 pivoted to the pitman 26. The action of the dog and pitman is to control the engagement and disengagement of the totalizer with the actuators. When the roller is on the low part of the cam 51 the dog is moved into position to condition the machine for addition, while contact with the high parts puts the machine into non-add condition. Secured to the hub of the cam 51 is another cam 71 that cooperates with a roller 72 on one arm of a bellcrank 74, the other arm of which carries a finger 78 which by its position determines the extent of engagement of the pawl 39 in its forward stroke to vary the line-spacing movement. The total - taking operation is controlled automatically by the provision of a pin 81 on the face of the cam 51. To convert the machine into a normal listing -machine the automatic controls are disabled. For this purpose the hub 50 that carries the cams 51, 71 is rotatably mounted on the platen shaft and is provided with a pair of lugs 103 Figs. 5, and 6, adapted to engage corresponding slots 104 in a slidable sleeve 105 rotatable with the platen shaft through a pin and slot connection 106, 107. In the position shown in Fig. 5, the cams are held stationary by a detent 121 engaging one of the lugs 103 ; when the sleeve is slid to its operative position the slots 104 engage the lugs 103 and the detent is disengaged. A ball detent 108 holds the sleeve in one or other of its two positions. Specifications 265,122, 265,134, 265,135, 265,136, 265,137, 265,140, and 265,152, [all in Class 106 (i)], are referred to.
Patent GB-1000601-A (GB)
Title: Improvements in or relating to windscreen wipers
IPC: B60S1/40
Filed: 1960-12-22
Abstract: 1,000,601. Windscreen wipers. W. E. O'SHEI. Dec. 20, 1961 [Dec. 22, 1960], No. 44076/60. Heading A4F. The end of a windscreen wiper arm 11 is attached to a yoke 9 by a channel-shaped connector 20 containing a leaf spring 29, the ends 22, 30 of the parts 20, 29 being passed through a transverse slot 23 in the yoke 9 and retained e.g. by a leaf spring 27 passing through apertures in the ends 22, 30. The leaf spring 29 is held in the connector 20 by fingers 33 and has pressed out shoulders 34 adapted to engage notches in the sides of the wiper arm 11. The latter may be released by manually depressing the end 36 of the spring 29. Alternatively one only of the ends 22, 30 is retained by the spring 27. In a further construction the spring 27 is omitted, the ends 22, 30 being bent over to retain them in the slot 23.
Patent GB-1003547-A (GB)
Title: Electrical signal detectors
Inventor: SCHEMEL RAYMOND ETIENNE
IPC: H03D3/08
Filed: 1963-11-08
Abstract: 1,003,547. Frequency discriminators; combiried A.M./F.M. receivers. STANDARD TELEPHONES & CABLES Ltd. Nov. 8, 1963, No. 44162/63. Headings H3A and H3R. In a Ferris type frequency discriminator the primary tuned circuit, having a minimum voltage across it within the bandpass of the secondary tuned circuit, is of much lower Q than the secondary tuned circuit. A portion of the output of the secondary circuit may be added by a R.F. transformer to the output of the primary circuit, to vary the centre frequency of the discriminator. The secondary rectified output may be used for A.G.C. or for negative feed-back reducing any amplitude variation in the input signal to the primary circuit, or distortion due to the discriminator itself. The discriminator is particularly useful in A.M./F.M. receivers, the output across RL 2  producing demodulated A.M. and that across RL 1 , or both RL 1  and RL 2 , the demodulated F.M. In a modification the outputs of the primary and secondary circuits are applied to a balanced rectifier bridge producing a D.C. output of reversible polarity for A.F.C. of an oscillator, in this case the secondary circuit load being a centre-tapped resistance in parallel with a much lower resistance forming the primary circuit load.
Patent GB-1179820-A (GB)
Title: Counterpoise Lamp
Inventor: SONNEMANN ROBERT
IPC: F21V21/29
Filed: 1968-09-17
Abstract: 1,179,820. Pivots; resisting pivoting. ROBERT SONNEMAN ASSOCIATES Inc. 17 Sept., 1968, No. 44178/68. Heading E2F. [Also in Division F4] A counterpoise boom (22, Figure 1, not shown) carrying a lamp (26) has a reinforcing sleeve 28 on a portion of its length and is pivoted on a pin 32 which extends through a transverse bore 30 in the sleeve and is supported by a pair of legs 20c formed by machining an axially extending transverse groove 20b at one end of a short tube 20a. The pin 32 has a screwthreaded portion at one end which engages a tapped hole in one of the legs 20c and a knurled body 32a at the other end which can be tightened against the other leg. The other end of the tube 20a is rotatably mounted on a plug 20d which is screwed into the end 16b of an arcuate tubular supporting body (16) and has a circumferential groove 20e engaged by a stop pin 20f passing through a transverse bore in the tube 20a. Friction between the stop pin and the plug is sufficient to hold the boom (22) in any angular position. The lamp (26) is connected to the boom by a ball and socket joint (Figure 5, not shown) of conventional construction and the other end of the body (16) is pivotally received in a bore in a wall bracket (14) or a floor stand.
Patent GB-1534324-A (GB)
Title: Crosslinkable polymers and filaments produced therefrom
IPC: C08F220/42
Filed: 1976-10-26
Abstract: 1534324 Copolymers of acrylonitrile BAYER AG 26 Oct 1976 [27 Oct 1975 (2)] 44385/76 Heading C3P A copolymer comprises at least 65% by weight of units derived from acrylonitrile, 1 to 20% by weight of units derived from a monomer of the formula where R is H or CH 3 , n is 0 to 5 and 0À1 to 7% by weight of units derived from a monomer of the formula where R<SP>1</SP> is a C 1 -C 10  alkyl group. In the examples acrylonitrile is copolymerized with acrylamide, and the methyl ether of N-methylol acrylamide or the isopropyl or butyl ether of N- methylol methacrylamide and in Example 3 also with methylacrylate and in Example 4 methylacrylate and sodium methallylsulphonate. Filaments and fibres are produced from dimethyl formamide solutions of the copolymers crosslinked by heating or acid treatment.
Patent GB-1101121-A (GB)
Title: Force transducer
Inventor: KEALY WELLESLEY ASHE
IPC: G01L11/00
Filed: 1963-11-12
Abstract: 1,101,121. Force balance transducer. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Nov. 4, 1964 [Nov. 12, 1963], No.44592/63. Heading G1N. In a force balance transducer measuring fluidpressure a primary member in the form of a bellows is displaced by the pressure and is restored by a secondary member acted on by an electromagnetic device, the current therein being a measure of the pressure; and the secondary member is additionally biased by a known force (e.g. its own weight) away from the primary member so that the electromagnetic current required to first overcome this known force may be observed to calibrate the transducer. Measuring pressure: A vertical cylinder is divided into three chambers by two horizontal partitions, each partition have a central opening which is sealed by a bellows extending into the respective end chamber. The central chamber is filled with a buffer liquid, and a higher fluidpressure in the upper chamber than in the lower causes the free ends of both bellows to move downwards. A rod, movable along the axis of the cylinder, has a cylindrical coil attached to it which moves, under the influence of a current therein, in an annular air gap formed by an annular permanent magnet attached to the cylinder and a central permanent magnet surrounding the rod; the rod, in operation, bearing against the free end of the upper bellows to restore it to its neutral position. The displacement of the rod is measured by a differential transformer, the current in the said cylindrical coil being a measure of the unknown force only when zero displacement is noted. To calibrate the device, the coil current is reduced to zero to allow the rod to fall away from the bellows and to rest against a convenient stop, the current required to first raise the rod (against the known force of its own weight) being noted and calibrated against the said weight.
Patent GB-922691-A (GB)
Title: Improvements in or relating to frequency converting networks
IPC: H03D9/06
Filed: 1961-12-14
Abstract: 922,691. Parametric frequency converters. WESTERN ELECTRIC CO. Inc. Dec. 14, 1961 [Dec. 29, 1960]. No. 44752/61. Class 40(9). A parametric frequency converter utilizes a variable resistor and variable reactor in parallel or series relationship, whereby the efficiency of the up conversion is increased and the efficiency of the down conversion is decreased. As shown (Fig. 1), the input signal #s from source 12 is fed to a parallel combination of variable resistor 22 and reactor 23, connected in series with a source 24 for the pump signal #p, and it is shown that, since the potentials across components 22, 23 are in quadrature, the arrangement acts as an efficient up-converter and inefficient down-converter. The circuit includes appropriate filters 19, 21, 26, 27 to prevent intermixing of the different frequency signals. An adjustable phase shifter may be incorporated to ensure that the potentials are in quadrature, and an attenuator to ensure that their magnitudes have the correct relationship. In an alternative arrangement (Fig.. 4, not shown), the variable resistor and capacitor are in series relationship with respect to the signal frequency. A physical embodiment of the circuit of Fig. 1 is described (Fig. 3, not shown). In a further embodiment (Fig. 5) utilizing a series combination of variable resistor 48 and reactor 49, the output frequencies (#p+#s) and (#p-#s) are fed to a further variable resistor 61 together with the pump frequency up from source 46, whereby both combined frequencies are demodulated to give an amplified value of #s, which is fed through filter 62 to a load 56.
Patent GB-1514104-A (GB)
Title: On-load tap-changer
IPC: E04D11/00
Filed: 1976-10-28
Abstract: 1514104 On-load tap changers MASCHINENFABRIK REINHAUSEN GEBR SCHEUBECK GmbH & CO KG 28 Oct 1976 [29 Oct 1975] 44816/76 Headings H1N and H1T An on-load tap changer for a tapped transformer comprises a load diverter switch 2, a changeover selector 4, a tap selector 3 comprising a cylindrical cage having two axially spaced end rings 7, 8, an elongate actuating member 13 rotatable step-wise about the axis of the cage for actuating the tap selector 3, a potential switch 5 for connecting a predetermined tap to a potential source having a hollow cylindrical body 14 of insulation material coaxial with the cage and supporting a fixed electrical contact 26, a lever 21 carrying a movable contact 25 and pivotably supported by the cage ring 8 facing the cylindrical body 14, the lever 21 being pivoted upon movement of the actuating member 13 to cause engagement and then disengagement of the contacts 25, 26 by a cam 27 mounted on the actuating member 13. The cage of the tap selector 3 is defined by insulating rods 9 connected to the end rings 7, 8 and carrying selector contacts 10, one of which is connected by a cable 16 to a terminal 15 provided on the insulating cylinder 14. The terminal 15 is connected to the fixed contact 26 via porcelain resistors (31) (Figs. 4 and 5, not shown) received in sockets (29) arranged on a helix on the inside wall of the insulating cylinder 14. The lower end ring 8 is provided with radial stays 17 secured to the insulating cylinder 14, one of the stays 17 pivotably supporting the lever 21 which is permanently connected to the cage ring 8 by terminal contacts 22, 23 biased together by a spring 24 which also biases the contact 25 on the lever 21 away from the fixed contact 26. When an actuating rod 13 is rotated by a gear 11, the cam 27 on the rod 13 engages a roller 28 on the lever 21 causing the contact 25 to engage the fixed contact 26. Subsequent movement causes the cam 27 to disengage the roller 28 whereby the electrical connection is broken. Three contact levers 21 may be provided to produce a three pole tap changer.
Patent GB-983796-A (GB)
Title: Improvements in fluid check valves
Inventor: ALLEN DEREK ALBERT
IPC: F16K15/14
Filed: 1962-11-28
Abstract: 983,796. Valves. BELL'S ASBESTOS & ENGINEERING Ltd. Oct. 28, 1963 [Nov. 28, 1962], No. 44960/62. Heading F2V. A flow check valve is combined with a sight glass for use in a boiler heating system. A transparent glass tube 1 is retained between endpieces 2 and 3, connecting to a pipe line, against sealing ring inserts 12 and 13. A flap check valve 14, pivoted on a pin 15, seats at 2a upon a sealing ring 18. In an alternative embodiment, the tube 1 seals around the circumference of a diaphragm 19 wherein a part circular cut 21 forms an integral flap valve 20, pivotable about the area 22. The closure 20 is weighted by a stud 25.
Patent GB-1024625-A (GB)
Title: Improvements in or relating to gyroscopes
IPC: G01C21/16
Filed: 1962-11-28
Abstract: 1,024,625. Gyroscopic apparatus. AGA A.B. Nov. 28, 1962 [Dec. 28, 1961], No. 44962/62. Heading G1C. In an inertial navigation system as in Specification 972,762 in which a rotor leaving case 10 is pivoted about an axis 12 within a gimbal ring 13 and a spring 16 exerts a torque by being connected between case 10 and gimbal 13 so that the gyroscope continuously precesses about the axis 14 of the gimbal 13 and a pick-off 17 detecting changes in the equilibrium angle α between the two gimbals 10, 13 controls, through amplifier 19, a torque motor 15 for applying correcting torques to the precessing gimbal, due to temperature variations, stress, and fatigue effects the spring rate of spring 16 is not constant but varies unpredictably giving rise to cyclic fluctuations of the angle α, referred to as nutations. To counteract these nutations, the signal is passed through detector 24, filter 25, 26 and line 29 to the input transformer 31 of a frequency detector 30 fed with a crystal-controlled reference frequency through line 34. The output of frequency detector 30 is passed through filter circuits comprising resistors 35, 36, 37, and capacitors 38, 39 to a device which functions as an electrical spring e.g. a capacitor device or, as shown, a very soft iron core magnet 40 having a winding 41 cooperating with an armative 43. By this arrangement the frequency of the nutations is maintained constant. Since the retentivity of device 40, 43 and molecular remanence of the rectifiers 32, 33 in frequency detector 30 cause errors, the restoring force generated by electrical spring 40, 43 is made as large as possible so that their effect is small compared with the desired signal and the large restoring force is balanced by feeding back the nutation frequency from rectifier 24 through amplifier 27 to the torque motor 15. If the amplification required of amplifier 27 were too large for stability a direct feed from the amplifier 27 though line 44 to the electrical spring may be made.
Patent GB-1253313-A (GB)
Title: Washing machines
Inventor: BRIGHENTI NORBERTO
IPC: D06F37/42
Filed: 1969-09-11
Abstract: 1,253,313. Locks. TEXAS INSTRUMENTS Inc. 11 Sept., 1969 [11 Sept., 1968], No. 44965/ 69. Heading E2A. [Also in Division F2] A washing machine includes a fastening device for the door of the machine, which fastening device includes a bolt 8 and a keeper 15 mounted one on the door and the other on the body of the machine, the bolt being cooperable with the keeper whereby movement of the door into and out of the closed position causes movement of the bolt into and out of a fastening position, and an electrically-operable locking mechanism including an electrical resistance 6 energizable to heat a thermally-responsive element 4 which is coupled to a locking projection 7 and is operable, when heated, to move the projection into engagement with the bolt to secure the bolt in the fastening position, and which, when heated; is engageable with a shunt 5 to electrically connect the shunt to the electrical resistance. In the construction shown the bolt is carried by a plate 10 which is secured to the body of the machine the bolt being biassed by a spring 12 and slidable between fastening and releasing positions; the bolt includes a stop 14 which is engageable with an indent 20 in the keeper the indent being so shaped that pulling on the door 2 causes a ramp surface of the indent to retract the bolt to allow release of the door. The keeper also has a second ramp surface which retracts the bolt during closing of the door. The thermally responsive element 4 is a bimetallic strip which is surrounded by a sleeve 9 of insulating material which carries the resistance 6, the resistance being connected to an operating voltage when the door is closed which causes the strip 4 to bend so that the projection 7 engages an aperture 13 in the bolt so locking the bolt in the fastening position; the resistance 6 is shorted by contact with the shunt 5 when the bimetallic strip has bent sufficiently so allowing the strip 4 to cool until the shunt is disconnected by the reverse bending of the bimetallic strip; the shunt is disconnected before the projection 7 releases the bolt. When the operating cycle of the machine is finished the voltage is removed from the resistance 6 so that the bimetallic strip 4 cools down and eventually after a delay releases the bolt so that the door can be opened.