baber/WOPTO huggingface dataset:
Patent GB-1374597-A (GB)
Title: Rotary sliding vane pumps and motors
IPC: F01C21/10
Filed: 1971-11-25
Abstract: 1374597 Rotary positive-displacement machines SPERRY RAND CORP 25 Nov 1971 [25 Nov 1970] 54761/71 Heading F1F A variable-output double-acting sliding-vane pump, or motor, has a partially-rotatable camring 40 supported by a ring 14 clamped between cheek plates 12, 16, the surface of the cam ring engaged by the vanes 39 of the rotor 36 having a symmetrical ovoidal profile which as indicated in Fig. 6 (not shown) is smoothly stepped in each of the intake and discharge regions. The parts of the profile in the intake regions differ from those in the discharge regions in shape and angular extent. The cam ring is moved circumferentially to change the output by fluid-pressure applied to chambers between lands 44 and pressure-loaded vanes 50. Inlet and outlet ports 22, 24 communicate with the intervane spaces through symmetrically disposed ports in the cheek plates, Figs. 3 to 5 (not shown). A shaft 32 coupled to the rotor by splines 38 contains lubricant passages 35 for bearings 30.
Patent GB-1411627-A (GB)
Title: Magnetic bearing
IPC: F16C39/06
Filed: 1972-11-28
Abstract: 1411627 Magnetic bearings LICENTIA PATENT-VERWALTUNGS GmbH 28 Nov 1972 [30 Nov 1971] 54986/72 Heading F2A [Also in Division G3]  The radial position of a body in a magnetic bearing is controlled by a magnet coil energized according to the body position as detected by two windings connected in opposition, and located inside the magnet coil.  As shown, coils 4 on a toroidal core 2 support a ferromagnetic cylinder 1, the air gap 3 being measured using windings 5 mounted within the coils 4. The inductance of the windings, which is dependent upon the actual air gap, may be measured using a signal of higher frequency than the frequency of the supply to coils 4. The current in coils 4 is controlled according to the measured air gap to maintain the cylinder coaxial with core 2. The windings 5, may be separated by a magnetic path 6, and can be mounted in each of four coils 4 spaced around the core 2, in an individual coil providing a correcting force (Fig. 2, not shown), or may comprise two elements mounted coaxially (Fig. 3, also not shown), to support a cylinder with its longitudinal axis vertical.
Patent GB-1394660-A (GB)
Title: Display device
IPC: A47F7/024
Filed: 1973-11-28
Abstract: 1394660 Display stands C & J MURRELL Ltd 28 Nov 1973 55067/73 Heading A4T A display device e.g. for audio cassettes comprises a pivotably mounted wing-like member 3 including at least one frame 4, 5 having an opening or openings 10 through which articles can be inserted into or removed from the frame 4, 5, means being provided for limiting movement of the frame 4, 5 between a position for insertion or removal and a blocked position in which the frame 4, 5 may be locked. Preferably three members are supported by pivot pins 15, 16 on arms 13, 14 borne by a tubular post 11, which post 11 may be rotatable on a support column 12. A pin 19 of each member 3 enters a slot 18 of a plate 17, so that pivoting of the member 3 is limited by engagement of the pin 19 with either end of the slot 18, the plate 17 turning on the post 11 during pivoting and constraining each member 3 to pivot simultaneously. For locking the member 3 in the blocked position in which the openings are too close to the post 11 for removal of the cassettes, &c, rotation of the plate in the blocked position is prevented by key operable locking means 20 on a plate 6 of the member 3, having a bolt for engagement with a hole (not shown) in the plate 17. Separate members 3 may be vertically spaced on a common column 12.
Patent GB-1488486-A (GB)
Title: Polymeric imides
IPC: C08F8/32
Filed: 1974-10-15
Abstract: 1488486 Polymeric imides OROBIS Ltd 15 Oct 1974 [28 Nov 1973] 55079/73 Heading C3P [Also in Division C5] Polymeric imides of formula wherein n is 10-100; R<SP>1</SP> is alkyl; and X is a group -(R<SP>11</SP>NH) m -R<SP>11</SP>NHR<SP>111</SP> or a group of formula wherein each R<SP>11</SP> is a C 2-4  alkylene group, m is 0-10, and R<SP>111</SP> is a C 20-150  alkenyl or alkyl group; are prepared by reacting alkyl vinyl ether/maleic anhydrice copolymers with the appropriate amine compound. In examples, octadecyl vinyl ether/maleic anhydride copolymer is reacted with (1) the reaction product of polyisobutenyl succinic anhydride and triethylene tetramine; and (2) the reaction product of chlorinated polyisobutylene and ethylene diamine. Use.-Lubricant additives.
Patent GB-1235449-A (GB)
Title: Improvements in and relating to severing moulded articles from a vacuum formed web
IPC: B29C51/22
Filed: 1968-05-08
Abstract: 1,235,449. Stacking articles. COMPAGNIA ITALIANA NEST-PACK S.p.A. 8 May, 1968 [27 Sept., 1967], No. 55399/70. Divided out of 1,232,833. Heading B8C. A device for stacking vacuum formed sections S of sheet material, each section containing a plurality of individual articles P, and subdividing the stacked sections into stacks of single articles includes a table 40 on to which the sections are run by conveyer belts 41 mounted flush with the table. As each section arrives on the table it is pushed sideways therefrom on to a stacking table 43, located to one side of and below table 40, by means of blades 47, rotatably mounted to one side of table 40 by means of a motor-driven shaft 44. The stack thus formed on table 43 is subsequently laterally transferred on to a conveyer 49 located directly below table 40 and is finally fed to a cutting device 51 for subdivision into individual stacks. The stack is fed by conveyer 49 on to table 52 until it abuts stop 53 after which blade 51 is lowered to cut stacks of single articles from the stack, the stack being firmly engaged during the cutting by a member 54 lowered with the blade. After cutting, the cutter and member 54 are raised, the cut stack of single articles removed and the rest of the stack indexed forward by the conveyer 49 to present a new set of articles to the blade.
Patent GB-1216928-A (GB)
Title: Real load unbalance protection circuit for alternating current power sources connected for parallel operation
IPC: H02H7/06
Filed: 1968-11-22
Abstract: 1,216,928. Protective systems; running generators in parallel. WESTINGHOUSE ELECTRIC CORP. 22 Nov., 1968 [10 Jan., 1968], No. 55502/68. Headings H2H and H2K. System for the detection of unbalance in real load between two or more A.C. power sources includes frequency sensing circuits which may operate to cut out a faulty source, and a biasing circuit which alters the operating limits of the frequency sensing circuits. In the circuit shown, two generators 1, 2 supply power to bus-bars 3 by way of circuitbreakers 4. Each generator is driven by an individual prime mover and has a current transformer 6 and a voltage transformer 7 connected to its output. Under normal balanced conditions, no current flows in the primaries of the transformers 7, and biasing circuits 16 deliver a constant voltage to the frequency sensing circuits 14, 15 by virtue of Zener diodes 20. These circuits 14, 15 are all substantially identical. The constant voltage is used to charge up a capacitor 33 for half-cycle period during which a transistor 26 is blocked, so thas the final potential across the capacitor depends on the generated frequency. This potential # 0  is compared with a fixed voltage #r, and a smoothed D.C. output is obtained from the circuit 14 which gives an indication of the frequency. If the frequency drops below a preset level, the D.C. output will be sufficient to cause removal of the generator from the system. An equalizer circuit (not shown) is provided to detect real load unbalance and to correct this by adjusting the speed of the generators which are working normally. Unbalance causes current to flow in the transformer 7, and this results in a change in the charging voltage supplied by the biasing circuits 16 to the sensing circuits 14, 15. Hence, the frequency sensed is not the actual adjusted frequency, but an effective frequency, which, for the normally operating generators, is arranged to be the same as the original frequency so that the smoothed D.C. output remains the same. For the faulty generator, the effective frequency will not be the same, and excessive deviation may lead to its elimination.
Patent GB-1073635-A (GB)
Title: Improvements in or relating to tetrahydrobenzo[cd]indoles and the manufacture thereof
IPC: C07D209/90
Filed: 1964-06-25
Abstract: Compounds of the formula <FORM:1073635/C2/1> and their oximes wherein R1 is H or C1- 4-alkyl, phenyl, hydroxyphenyl, alkoxyphenyl (wherein the alkoxy group contains 1-4 carbon atoms), or halophenyl; R2 is H benzyl or halobenzyl, optionally substituted by alkyl or C1- 4 alkoxy, or C1- 4 alkyl; R3 represents from 0 to 3 substituents selected from hydroxy, benzyloxy, C1- 4-alkyl, halogen, C1- 4-alkoxy; and R4 is C1- 4 alkyl are prepared by reducing a compound of the formula <FORM:1073635/C2/2> with a lithium alkyl and optinally forming the oxime.  The above processes may be combined with those wherein the carboxylic acid is prepared by subjecting the corresponding 1,3,4,5-tetrahydro - 5 - oxobenz - [c,d] - indole 3-carboxylic acid to a Huang-Minlon reduction, the 5-oxo-derivative, in turn, being produced by cyclisation of a 1-subtituted-3-indole succinic acid anhydride in turn prepared by reacting either a 3-indole succinic acid with maleic acid or anhydride in a Diels-Alder reaction or a 3-indole carboxyaldehyde with ethyl cyanoacetate or diethyl malonate then reacting the condensed product with KCN and hydrolysing the resultant product to give the 3-indole succinic acid and reacting this with an isopropenyl alkanoate.
Patent GB-1151680-A (GB)
Title: Improvements in or relating to Outwardly Opening Windows for Motor Vehicles
IPC: B60J1/14
Filed: 1966-06-03
Abstract: 1,151,680. Flexible windows. VOLKSWAGENWERK A.G. 3 June, 1966 [10 July, 1965], No. 56344/68. Divided out of 1150653. Heading E1J. A vehicle window pane 2 made of flexible safety glass and which is fixed along one edge 1 and can be opened along a free edge 2 is either initially planar and fitted into a horizontally curved frame (as shown), or is initially curved concave outwardly (Fig. 1, not shown), so that in both instances, when the pane is closed the loading on the window seal is approximately uniform.
Patent GB-1326700-A (GB)
Title: Magnetic tape recorders
IPC: G11B15/12
Filed: 1971-12-15
Abstract: 1326700 Automatic control of position RICOH K K 15 Dec 1971 [26 Dec 1970] 58369/71 Heading G3R [Also in Divisions H1 and G5] To maintain the alignment of a record/reproduce head 2 with a recorded track on a video or other magnetic tape the head is biased to one side by a spring 7 opposed by an electromagnet 14 energized in response to signals from a sensing head 4 (amplified at 15). As shown the tape is endless and has a plurality of tracks inter-connected to form a single, long, track. To ensure that each new track is followed the electromagnet may have a conical winding, to provide more flux as the spring 7 is extended, or an unspecified memory device following amplifier 15 provides an energization appropriate for each track. The position of the head for the first selected track is set by a cam 29, and a further cam 28 sets a limit switch de-energizing the magnet and so resets the head to its starting position.
Patent GB-1474700-A (GB)
Title: Device for detecting and indicating the presence in a fluid  environment of a potentially dangerous constituent
IPC: G01N33/00
Filed: 1974-12-16
Abstract: 1474700 Measuring gas concentration electrically NEOTRONICS Ltd 16 Dec 1974 [18 Dec 1973] 58481/73 Heading G1N A sensor selectively sensitive to the presence in a fluid environment, e.g. the atmosphere, of a constituent such as a toxic or combustible gas, e.g. carbon monoxide or methane, produces a signal representative of the concentration of constituent in the environment, and signal translation means responsive to said signal produces a modulated output which has a repetition rate indicative of the concentration of constituent. A catalytic transducer sensitive to the presence of methane in air is arranged in a bridge circuit 2 so that the latter provides an output representative of methane concentration which is applied via a D.C. amplifier 4 to control the frequency of an AF oscillator 6, which controls via a modulator 7 the output of a further AF oscillator 8 capable of energizing an acoustic device 10. A threshold level detector 12 controls the modulator 7 so that no modulation of the oscillator 8 occurs unless the methane concentration reaches a selected danger level. A further threshold level detector 16 is energized at a selected high concentration of methane to actuate a warning lamp 18, to ensure that a warning is provided before the sensor becomes less sensitive due to the high methane concentration. The oscillator 6 comprises a multi-vibrator, the frequency of which is controlled by applying the voltage output of the D.C. amplifier 4 as a bias to a field effect transistor (T 2 ) Fig. 2 (not shown) connected in parallel with a resistor (R 4 ) in the charging circuit of a capacitor (C 4 ) of which the charging time determines the period of the multivibrator 6. Alternatively, the voltage from the D.C. amplifier 4 actuates closing, at a variable rate, of a switch 30, Fig. 3 (not shown) to short circuit the resistor (R 4 ). The modulator 7 comprises a resistor capacitor network providing an output of sawtooth form.
Patent GB-1441290-A (GB)
Title: Mass spectrometers
IPC: G01N27/62
Filed: 1973-12-18
Abstract: 1441290 Mass spectrometers NIHON DENSHI KK 18 Dec 1973 [18 Dec 1972] 58665/73 Heading H1D A multiple beam mass spectrometer comprises a plurality of ion sources 1, 2 supplied from 9 with a respective ion accelerating voltages which periodically, at least, differ under the control of a pulse generator 8, electrodes 3, 4 for directing the ion beams to a common path at slit 11, means 13 for electrostatically separating the ions according to their energy, the beam emerging from slit 16 being a time divided multiplex beam as a result of the periodic variations in the ion source accelerating voltages. This emergent beam is then magnetically analysed at 14 according to the ion mass-charge ratios, the analysed ions then being detected at 19 to give a signal which is processed at 23 to separate the components of the multiplex signal. The accelerating voltages applied to the ion sources can be in antiphase, or one can be held constant. The emergence of ions from the sources can be prevented during the time when the accelerating voltages are being charged. The power source 15 of the electrostatic analyser 13 can also be connected to the pulse generator 8, Fig. 2 (not shown). It is stated that this improves the focussing and reduces aberrations.
Patent GB-1383174-A (GB)
Title: Rf microwave communications repeater systems
IPC: H04B7/155
Filed: 1971-12-21
Abstract: 1383174 Radio signalling: repeaters INTERNATIONAL MICROWAVE CORP 21 Dec 1971 59477/71 Heading H4L An r.f. repeater consists of an input bandpass filter 22 and a negative resistance amplifier 24, a frequency changer 28 followed by another bandpass filter 34 at the new frequency, and a chain of at least three tunnel diode amplifiers 24-1 to 24-4 driving a power amplifier 20. The tunnel diode amplifiers each has an associated circulator which, in the event of failure of an amplifier, passes the signal on to the next amplifier. The power amplifier is a travelling wave tube; or it may consist of one or two frequency lock oscillators which lock on to the signal to be amplified and transmitted by the antenna 12; alternatively Gunn or avalanche devices may be used. The frequency changer 28 is also a tunnel diode and receives the output of a local oscillator 30 at frequency f 2 , the shift of received signal frequency f 1  being f 2  or 2f 2 . The oscillator output may be phase modulated by a signal at 32 to insert an alarm or special order signal into the transmitted signal.
Patent GB-600140-A (GB)
IPC: H01H50/88
Abstract: 600,140. Electromagnetic relays. MOE, K. O. Sept. 28, 1945, No. 25203. Convention date, April 29, 1944. [Class 38 (v)] In a relay with a time delay, a member 4 carried by the armature 2 makes a succession of hammer blows on a blocking member 5 moving this step-by-step about its pivot 7 till the member 5 is clear of the member 4 and the armature can make its full actuating stroke. The vibration of the armature may be produced by using A.C. to energize the coil or, if D.C. is used, by making the members 4, 5 contacts which short-circuit the coil or part of it, so that a self-interrupting action ensues. When the relay is de-energized, the armature 2 engages a projection 8 which returns the blocking member 5 into its original position. Adjustment for time of delay &c. is effected by the screws 10, 11.
Patent GB-1236510-A (GB)
Title: Improvements in or relating to signal receiving systems
Inventor: MULLIN FRANK JOSEPH
IPC: H04N7/084
Filed: 1969-12-10
Abstract: 1,236,510. Muting. WESTERN ELECTRIC CO. Inc. 10 Dec., 1969 [16 Dec., 1968], No. 60269/69. Heading H3T. A receiver for a time-division multiplex signal which includes reference pulses has means for muting at least one component signal upon deterioration of the reference pulses, comprising a multivibrator 22 having a free-running frequency less than the repetition frequency of the reference pulses. Means are provided for synchronizing the multivibrator to the reference pulses, filter means 23 being connected to the output of the multivibrator 22 for rejecting the frequency of the reference pulses and its harmonics and passing a harmonic of the free running frequency, and gating means are connected to the output of the filter means for muting the one component signal when the output of the filter means exceeds a predetermined level. The embodiment comprises a receiver for television signals in which the sound is transmitted as amplitude-modulated pulses occurring in the front porch periods of synchronizing signals and the free-running frequency of the multivibrator 22 is 13 KHz, being synchronized to the synchronizing frequency of 15.75 KHz. Filter means 23 comprises a band-pass filter of 2À5 KHz bandwidth, centred on 39 KHz, which is coupled to threshold detector 24 which controls gate 26 across the audio output of the receiver. The Specification includes transistor circuits for the multivibrator 22 and threshold detector 24 (Figs. 2, 3 respectively, not shown).
Patent GB-1382430-A (GB)
Title: Artificial legs
IPC: A61F2/66
Filed: 1971-12-30
Abstract: 1382430 Artificial legs K A FRIBERG AB 30 Dec 1971 [7 Jan 1971] 60834/71 Heading A5R An above-knee leg prosthesis comprises a thigh section 1; a shank section 3 pivotally attached to the thigh section 1 by a knee-joint  shaft 2; an ankle section 4 attached to the shank section 3 and including a plate 31; a foot 5 having a plate 40 which is pivotally attached to the forward end of the ankle plate 31 by a horizontal shaft 30, the shaft 30 being positioned in front of the weight-supporting line 57; a spring 51 mounted behind  the horizontal shaft 30 and between the plates 40, 31 for biasing them apart; and a mechanism 8 for controlling flexure of the knee joint. The angle between the plates 40, 31 is limited by the head 49 of a bolt 45 attached to the ankle plate 31 and extending down through a hole in the foot plate 40. A washer 50 of rubber or other resilient material is positioned between the foot plate 40 and the bolt head 49 and a similar washer 48 is between the plates 40, 31. The ankle plate 31 has a vertical bore 54 with a shoulder 53 at its upper end. Inside the bore 54 are the spring 51, and a chuck 28 which is below the spring 51 and is forced thereby against the foot plate 40. The chuck 28 is connected, through a wire (26), lever (21), Fig. 2 (not shown) and a wire 23, to the joint-control mechanism 8. The mechanism 8 may, as shown, consist of two intercommunicating hydraulic piston-and-cylinder devices 9, 10. When the prosthesis is loaded the plates 40, 31 are forced together, and the chuck 28 is moved upwardly in the bore 54. This causes locking of the mechanism 8 by closing of the intercommunication between cylinders 9, 10. In the loaded position, Fig. 3, the knee-joint shaft 2 is behind the weightsupporting line 57. When the load is removed, but the foot 5 is still in contact with the ground, the spring 51 causes the shank section 3 to pivot forwardly about the shaft 30, thus moving the knee-joint shaft 2 is front of the weight-supporting line 57, Fig. 4 (not shown). Simultaneously the mechanism 8 is unlocked. When the foot 5 is lifted from the floor, the spring 51 causes the toe to pivot upwards. The foot plate 40 may be attached to the foot 5 by a universal joint 41 in a pad 43 of compressible material. In an alternative embodiment, Fig. 13 (not shown) the bolt (45) and washer (50) are replaced by a bracket (65) attached to the rear of the ankle plate 31 and having a portion (68) turned inwardly under the foot plate 40. with an elastic member (69) in the gap (67) therebetween.
Patent GB-1383901-A (GB)
Title: Device for aligning two horizontally displaced surface positions on  two elements
IPC: G03F9/00
Filed: 1970-12-23
Abstract: 1383901 Printing apparatus STOKES FOUNTAINS Ltd 21 March 1972 [23 Dec 1970] 61284/70 Addition to 989453 Heading B6C The plate registration device of Specification 989,453 is improved by providing means whereby the arms carrying the indicators may be "inched".
Patent GB-1246580-A (GB)
Title: Improvements in methods of manufacturing stators for rotary piston internal combustion engines, and in such stators
IPC: F02B55/08
Filed: 1969-12-24
Abstract: 1,246,580. Rotary-piston internal combustion engines. SOC. DE CONSTRUCTIONS MECANIQUES PANHARD & LEVASSOR. Dec.24, 1969 [Dec.31, 1968], No.62772/69. Heading F1F. [Also in Division B3] A rotary-piston I.C. engine casing 1 is made (see Division B3) by casting around a sintered sparking plug seating 2 which can be subsequently machined to form the plug socket. The sintered seating may be of Al (possibly including 5-15% alumina), Mg, Mg with magnesia, Ni with 7-8% thoria or Cu-alumina or Cu-Ni-alumina. The casing 1 may be Al or Al alloy, Mg or grey or spheroidal graphite cast iron.
Patent GB-2023537-A (GB)
Title: Adjustably Mounting Lift Forks
IPC: B66F9/14
Filed: 1978-06-16
Abstract: Lift fork apparatus having a fork body (7) the upper end of which is formed with a hook portion (8) for engagement selectively with notches (5a) in a transverse support member (5). An inverted T-shaped latch member (17, 18) is carried by the hook portion (8) above the support member (5) and is urged by a spring (23) into a selected notch (5a) and is removably liftable from the notch by a rotatable handle (20) determining whether the latch engages, or is held clear of, a notch. <IMAGE>
Patent GB-2000042-A (GB)
Title: Process and apparatus for filtration of liquids
Filed: 1978-06-16
Abstract: An apparatus for filtering water containing particles of impurities includes a chamber 10 containing layers 20, 21, 22, 23 of filter material. An inlet passage 15 communicates with distributors 16, 17. An outlet passage 18 communicates with collector pipes 19 lying within the bottom layer 20 of filter material. The height of a material-free zone 24 between the layer and the distributors 16, 17 is not greater than the combined thickness of the layers 20, 21, 22, 23 and is preferably not greater than half this thickness. The filtration process includes backflushing the filter material at intervals to remove accumulated impurities, and according to one aspect of the invention backflushing is carried out using unfiltered water. The apparatus and process enable equipment of less size and weight than has previously been considered feasible to supply a given quantity of filtered water, the reduced size and weight being particularly advantageous for the filtration of seawater on offshore oil platform. <IMAGE>