baber/WOPTO huggingface dataset:
Patent GB-1296741-A (GB)
IPC: H03G1/00
Filed: 1970-05-19
Abstract: 1296741 Volume control circuits INTERNATIONAL BUSINESS MACHINES CORP 19 May 1970 [21 May 1969] 24112/70 Heading H4R A variable impedance includes a "T" network each arm of which comprises a plurality of parallel branches each including at least one unidirectional conducting device, a current generator being arranged to control the impedance of the network by feeding a current into a node. Various embodiments using diodes and transistors as unidirectionally conducting devices are described. The networks may be used as feedback paths in gain controlled amplifiers and an auxiliary network may be provided in parallel with the feedback path or in series with the amplifier to provide dynamic compensation for component characteristic variations due to changes in ambient conditions. It is also stated that the networks could be used in radio receivers or data transmission systems. As shown a feedback path for an amplifier Aop includes a balanced "T" network of diodes. The arms A, B, C and D, E, F of each "T" each comprise m, p and n-m branches each including a series of h diodes. A current generator I is arranged to cause a current to flow between the nodes of the "T" networks. The impedance of the feedback path varies generally linearly with the magnitude of the current. Mathematical theory is given showing how the impedance and current are related to the numbers m, p and n-m and shows that the choice of these numbers alters the range of current over which the impedance/current relationship is substantially linear.
Patent GB-1303646-A (GB)
IPC: A61M16/04
Filed: 1969-08-12
Abstract: 1303646 Pharyngeal airway BIOLOGICAL INSTRUMENTS Ltd 23 Sept 1970 [12 Aug 1969] 40231/69 Heading A5T A breathing device comprises two laterally disposed elastomeric tubes 1 joined at both ends by sleeves 5 and 7 and fitted with webs 6 and 8 respectively, enabling the device to be positioned firmly in a patient's trachea. Each tube, which is of annular cross section consists of a straight portion 2, a curved portion 3 and a downwardly directed portion 4. Holes 10 may be provided in the walls of the tube. A radially, extending flange 9 surrounds the front ends of the tubes.
Patent GB-1305376-A (GB)
Inventor: FILL M A
IPC: B01L3/02
Filed: 1969-02-03
Abstract: 1305376 Drop delivering apparatus WELLCOME FOUNDATION Ltd 30 Jan 1970 [3 Feb 1969] 5655/69 Heading B8N [Also in Divisions B1 and F1] Calibrated liquid delivery devices such as burettes, pipettes or syringes are operated by a method comprising after delivery of liquid through the nozzle of the delivery device, discharging a droplet of liquid from the tip of the nozzle by directing a puff of gas symmetrically around and past the tip in the direction of delivery of liquid through the nozzle. A calibrated liquid delivery device which may be used as above or for stirring a liquid into which the delivery nozzle projects comprises a calibrated reservoir for the liquid, the reservoir terminating in a nozzle, and a sleeve coaxially aligned around the nozzle, the sleeve having an inlet for gas and an outlet for outflow of gas symmetrically around the tip of the nozzle. The gas may be supplied by a hand-operated bulb or syringe. The inlet to the sleeve may be a side-tube having a press-button valve.
Patent GB-1307062-A (GB)
Title: Articulated vehicle control system
IPC: B62D53/08
Filed: 1970-04-30
Abstract: 1307062 Anti jack-knifing systems D W MONNERY 30 April 1970 47588/72 Divided out of 1307061 Heading B7T In an articulated vehicle, jack-knifing is controlled by a pair of cables 82, 83 stored respectively on an associated pair of spring loaded drums 84, 85 rotatably mounted on the tractor 81, the free end of each cable being secured to a respective corner of the trailer 80 and each drum being integral with, or driving, a friction disc 92 brakeable by a caliper 93 fixedly mounted on the tractor and operative on application of the tractor braking system to prevent pay-out or retraction of the cables.
Patent GB-1308472-A (GB)
Title: Apparatus for and method of producing a population inversion in  a flowing gaseous laser medium
IPC: H01S3/0953
Filed: 1970-05-08
Abstract: 1308472 Lasers AVCO CORP 8 May 1970 22458/70 Heading H1C In order to provide population inversion in CO 2  gas the gas is heated and then expanded through a nozzle. The arrangement is based on the fact that the polyatomic CO 2 , has several modes of vibration and the times required for equilibrium with translation and rotation of the modes can be quite different and this difference in vibrational relaxation times of separate modes allows the production of a complete population inversion between vibrational levels of different modes. After heating, the polyatomic gas is expanded through a supersonic nozzle such that the flow time in the nozzle is short compared to the effective relaxation time of the atoms in an upper lasing level (asymmetric mode of vibration) and long compared to the effective relaxation time of atoms in a lower lasing level (symmetric mode of vibration). As the CO 2  gas passes from subsonic to supersonic velocity in the nozzle the temperature and density drops rapidly and since the upper level vibrational energy is not able to follow this rapid temperature change it remains at a high level whereas the lower level energy remains close to equilibrium, i.e. the downstream temperature and population inversion results N 2 /CO in accordance with the invention is added to the CO 2  to lengthen the effective relaxation time for the upper lasing level and H 2 O vapour to decrease the effective relaxation time of the lower level. In the master oscillatoramplifier system shown in Fig. 9, CO 2  gas together with suitable auxiliary gases is heated in chamber 13 and then expanded to supersonic velocities through nozzle 14, Figs. 12, 13 (not shown), into chamber 15. Input beam 16 from N 2 /CO 2  oscillator 12 amplified in an intermediate amplifier, not shown, is passed through the population inverted amplifier 11 via windows 17, 18 to obtain amplification. A folded mirror arrangement may be used to increase the path length in the amplifier 11. In an alternative arrangement, Fig. 10 (not shown), cyanogen C 2 N 2  and a mixture of oxygen, nitrogen and hydrogen are fed into a combustion chamber where they are burned to give a mixture of N 2 /CO, CO 2  and H 2 O in complete equilibrium. The burned gases are then expanded through a supersonic nozzle into a divergent chamber where the CO 2  exists in a state of population inversion. Windows may be provided in the walls of the divergent chamber, as in Fig. 9, if the arrangement is to operate as an amplifier. If the arrangement is to operate as an oscillator the windows are replaced by mirrors, the output mirror being in the form of an optically polished copper surface provided with a plurality of apertures for energy extraction.  Operating parameters of the device are discussed in the Specification.
Patent GB-1309371-A (GB)
Title: Machine for manufacturing multilayer shells from strip
IPC: B21D51/24
Filed: 1971-01-01
Abstract: 1309371 Winding machines; making pressure vessels B E PATON A V KURAMZHIN V M MAKAROV B G ZISELMAN V B ROMASHEVSKY P G SEROV O O ROZENBERG and V D TROTSENKO 1 Jan 1971 171/71 Headings B3A and B3E A machine for winding a metal strip comprises a pair of support rollers 6, 7 for a hollow mandrel 15 on which the strip is to be wound and a pressure roller 28 mounted on pivotal supports 27 of acrosshead 19 which is urged towards the mandrel by hydraulic jacks 35, 37. The pressure roller 28 is of smaller diameter than the bearing rollers and is backed-up by spaced rolling bearings 29, Fig. 3, which are urged towards the pressure roller 28 by screw operated wedges 32.  The crosshead 19 is moved relative to the mandrel by hydraulic jacks 22 operating on a compound pulley 23 whose rope is connected to the crosshead. The support roller 6, Fig. 1, is driven through a universal joint 9 and the rollers 6, 7 are separable by screws 6a, 7a. The support rollers and the pressure can be skewed relative to the mandrel to correct the strip position during winding. In operation the leading end of the strip is welded to the mandrel prior to the pressure roller being moved down. The wound strip and mandrel are used as a multilayer shell for a pressure vessel.
Patent GB-1314289-A (GB)
Title: Four-cylinder in-line hot gas engines
IPC: F02G1/044
Filed: 1971-12-18
Abstract: 1314289 Hot gas engines UNITED STIRLING (SWEDEN) AB & CO K B 18 Dec 1971 58907/71 Heading F1S A hot gas engine comprises four cylinders 1, 2, 3, 4 arranged in line and each accommodating a double acting piston connected to a common crank shaft (not shown). The engine comprises heater pipe systems 16, 17, 18, 19 of arcuate shape arranged in pairs. Housings 12, 13, 14, 15 arranged adjacent the cylinders contain regenerators and coolers.
Patent GB-1318516-A (GB)
Title: Vertically adjustable scaffolding
IPC: E04G1/14
Filed: 1969-10-28
Abstract: 1318516 Vertically adjustable scaffolding KWIKFORM Ltd 21 July 1970 [28 Oct 1969] 52659/69 Heading E1S In a scaffold frame comprising at least one upright and one transverse member, for use in constructing e.g. a scaffold tower, a height adjusting device comprises an element 11 disposed between and slidably mounted on two spaced apart parallel tubes or bars 12, the slide element 11 having a short tube 18 for load-transmitting connection with an upright member of a lower scaffold frame, the two tubes or bars 12 being connected together and spaced to accommodate between them part of that upright member and having a number of longitudinally spaced holes 37, and the slide element 11 having load-transmitting pins 23 selectively engageable with these holes. The short tube 18 of the slide element is rigidly connected to two sleeves 21 which slide on the bars or tubes 12 and is connected by a threaded bolt to a plate 26; the pins 23 rest in recesses 22 in the sleeves 21 and the plate 26 is provided with extensions 27 which prevent inadvertent removal of the pins 23 from the holes 37, and the plate 26 also has pins 29 which bear against the bars or tubes 12 to clamp the slide element 11 thereto when the bolt is tightened. A scaffold tower is constructed from such frames in the manner described in Specification 1163000.
Patent GB-1322906-A (GB)
Title: Contacts
IPC: H01R13/115
Filed: 1970-03-05
Abstract: 1322906 Two-part couplings CANNON ELECTRIC (GB) Ltd 19 April 1971 [5 March 1970] 10622/70 Heading H2E A socket contact as described in Specification 1,066,109 is modified in that a resilient clip 7 is placed round the fingers adjacent to their ends. The clip may be accommodated in a suitably shaped groove in the outer surfaces of the fingers, and the action of the clip is said to enhance the contact making properties of the socket.
Patent GB-1324263-A (GB)
Title: Paper cap
IPC: A42B1/04
Filed: 1970-04-24
Abstract: 1324263 Caps ADHESIVE TAPES Ltd 22 April 1971 [24 April 1970] 19946/70 Heading A3V  A cap comprises a paper tube 1 having a free end 3 and with its opposie end formed into a block-bottom folded base 4 by folds 5, 6, 7 as shown, the tube 1 being made such that when it is collapsed and folded down over the base 4 the free end 3 is inset from the edge of the base. The free end 3 may be cut square or at  a rake angle such that in use the cap may reach further down at the back than at the front of the wearer's head. The paper used has a soft handle, is absorbent and is capable of a degree of stretch of at least 2%, and may be a non-woven fabric, e.g. a creped or compacted non-woven fabric, or a non-woven fabric with a long fibre reinforcement, or a non-woven fabric in conjunction with tissue paper. The tube 1 may be manufactured on paper-bag making machine such that adhesive is applied along one longitudinal margin of a band of paper, and the paper is then folded longitudinally and opposite margins pressed together to form a lapped seam 2, and the base 4 may also be formed on a paper-bag making machine, the folds 7 being secured together by adhesive. The adhesive used may be a waterbase adhesive. An alternative embodiment provides for the sides of the tube below the folds 6 to be folded inwardly, this gives the base 4 a rectangular shape.
Patent GB-1326100-A (GB)
Title: Circular magnetic domain devices
IPC: G11C19/08
Filed: 1970-12-31
Abstract: 1326100 Magnetic storage devices PLESSEY CO Ltd 17 Nov 1971 [31 Dec 1970] 61975/70 Heading H3B A propagation path 7, Fig. 2, for cylindrical magnetic domains is divided into two branches 8, 9, the propagated domains being moved into a selected one of the branch paths according to the polarity of a switchable magnet 10 located at the path junction. To transfer approaching domains into the alternative branch path, the combined magnetic effects of a control cylindrical domain and a localized magnetic field pulse are used to reverse the magnet polarity, the control domain being either propagated along the path 7 or along a separate control path 12. A plurality of the Fig. 2 branching arrangements may be used to form a tree circuit, Fig. 5 (not shown), selective switching of the associated magnets 10 determining the single propagation path for approaching domains. A serial data storage device is shown in Fig. 3 comprising a closed propagation loop 14 which may be selectively coupled to closed propagation loops 15-18 through magnet switching arrangements 19 (each as shown in Fig. 2) and respective associated coupling paths 21, 23, 25, 27. Selective coupling in the reverse direction is provided by further switching arrangements 19 respectively associated with coupling paths 20, 22, 24, 26: control domains are circulated in a closed propagation path 30. Domain generators 28, 31 are provided in each of the loops 14 and 30 together with readout arrangements 29, 32. In this device a binary pattern of circular magnetic domains may be transferred from propagation loop 14 to any of the loops 15-19 or vice versa. In a modification, Fig 4, spaced binary domain patterns 33 are circulated in loops 15-18 with control domains selectively introduced in the spaces between the patterns in those loops whose content is to be transferred to loop 14. The magnetic field pulse may be produced by energizing a coil or printed circuit strip conductor adjacent to each magnet 10. The domains are developed in a thin layer of uniaxial magnetic material, e.g. orthoferrite, having propagation paths defined by a pattern of soft magnetic material such as permalloy, the reversible magnets being formed as a thin film layer. Domains are generated by the action of an in plane rotating magnetic field on a magnetically soft disc having an associated permanent cylindrical domain.
Patent GB-1332539-A (GB)
Title: Lehr roll millboard formed from asbestos fibres and employing  finely divided silica caldium lime and bentonite as a binder
IPC: C04B28/18
Filed: 1971-07-21
Abstract: 1332539 Asbestos millboard NICOLET INDUSTRIES Inc 21 July 1971 34146/71 Heading C3N [Also in Division D2] An asbestos millboard comprises asbestos fibres and a binder, the binder comprising finely divided silica, having a particle size in the submicron range, calcium lime and bentonite clay in the proportions 1À5-7 (preferably 5-7), 3-9 (preferably 5-9), and 1À5-5 (preferably 3-5) respectively, by weight on a dry basis. The asbestos fibres may comprise a mixture of chrysotile (15-45%) and anthophyllite asbestos fibres (40-55%) optionally with amosite asbestos fibres (0-25%), percentages being based on the weight of the millboard. A specific example describes an asbestos millboardconsisting of 21% by weight chrysotile asbestos fibres, 15% by weight amosite asbestos fibres, 47% by weight anthophyllite asbestos fibres, 5% by weight finely divided silica, 7% by weight calcium lime and 5% by weight bentonite clay. A suitable finely divided silica has a particle size of 50 millimicrons. The millboard is produced by dumping an aqueous furnish of the ingredients on to a screen and then applying the necessary pressure. The boards are subsequently dried and find application as lehr rolls in glass manufacture.
Patent GB-1334535-A (GB)
Title: Wave-form generator
IPC: H04N3/233
Filed: 1971-04-19
Abstract: 1334535 Cathode-ray tube circuits; pulse generators RCA CORPORATION 19 April 1971 [11 March 1970] 6092/71 Divided out of 1334534 Headings H4T and H3T A waveform generator for top and bottom pincushion distortion correction produces a correction waveform comprising parabolic shaped horizontal frequency pulses amplitude and polarity modulated by the vertical deflection sawtooth waveform of a (television) cathode-ray tube display. As shown in Fig. 1, for the production of the parabolic line frequency components the vertical sawtooth from terminal A (Fig. 2A) of the vertical deflection generator 50 is supplied to the collector of transistor 80 and "chopped" into line frequency pulses (Fig. 2C) by means of horizontal fly-back pulses (Fig. 2B) supplied to the base electrode from the horizontal deflection generator 40. The "chopped" waveform is then amplified by transistor 90 and the parabolic shape (Fig. 2D) is produced by a negative feed-back path which includes a first differentiating circuit comprising capacitor 95 and resistor 96, transistor 100 and a second differentiating circuit comprising capacitor 105 and a resistive portion formed by the input impedance of the base circuit of transistor 90. The phase of the correction is adjusted by resistor 107. The waveform of Fig. 2D corresponds to a horizontal scan line during the first half of each vertical scan and is inverted (in polarity) during the second half of each vertical scan interval. Such waveform, at terminal B is supplied via diode 110 and transistor 116 to a pincushion modulator 120 and since correction is not necessary during the vertical blanking interval a positive pulse from the vertical output amplifier 60 reverse biases diode 110. Instead of applying the correction signal to a pincushion modulator it may be applied directly to the vertical output amplifier as shown in Fig. 3.
Patent GB-1340371-A (GB)
Title: Circular knitting machines for the production of tubular  knitted fabrics having floating threads at one particular location
IPC: D04B9/20
Filed: 1971-07-01
Abstract: 1340371 Knitting-machines WIRKMASCHINENBAU KARL-MARX-STADT VEB 1 July 1971 30955/71 Heading D1C In a circular knitting machine knitting flat fabric the two ends of which are joined by floats, the floats are prevented from fouling the machine by a deflector 3' in the knitting plane provided on the dial 1, deflectors 9, 10 on the fabric spreaders 11, 12 and plate 14 between the take down rollers 8 and the cloth beam 4.
Patent GB-1349751-A (GB)
Title: Control device for an electrical circuit
IPC: H05B39/08
Filed: 1970-03-05
Abstract: 1349751 Control of consuming devices and motors K R DEXTER 19 April 1971 [5 March 1970] 10592/70 Headings H2H and H2J A device for controlling the power delivered to a load 12, such as an electric motor, heater or lighting installation comprises an ON-OFF switch 14 integral with a power regulating device, such as a potentiometer 18, the switch being operable at all setting of the regulating device. The power delivered to the load 12 is controlled by a triac 4, the gate signal for which is derived from a capacitor 10 by way of a disc 2, the rate of charge of the capacitor being determined by the setting of the potentiometer 8. The switch 14 and the potentiometer 8 may be controlled by a single control knob, the switch by a push-pull and the potentiometer by a rotary action. A neon lamp or a unijunction transistor may replace the triac.
Patent GB-1351876-A (GB)
Title: Packaging apparatus
IPC: B65B5/08
Filed: 1972-04-10
Abstract: 1351876 Packaging apparatus CANADIAN INDUSTRIES Ltd 21 March 1973 [10 April 1972] 16406/72 Heading B8C An apparatus for packaging stacks of flexible articles, such as plastics bags, comprises an input conveyer 1, 5 or 2, 6, Fig. 1, which is adapted to accept successive stacks of articles and convey them to a stack pick-up position, stack clamping means 12, 13 located at the pickup position and traversable in a direction away from the stack pick-up position; and a container holding means 22-24 which is located within the traverse of the clamping means and which is adapted to hold an open container in such position that the clamping means can insert a stack of articles therein. As shown, a stack of bags is placed, with the assistance of a draping arm 3 or 4, into one of two, alternately-chargeable, baskets 1, 2 located, for loading, at the outer end of the corresponding one of a pair of, inwardly converging, tracks 5, 6 of the input conveyer each basket being formed of three separate sections. After the stack has been loaded the charged basket, for instance 1, is moved, by means of an endless cable-andcylinder mechanism 7, along its track 5, the outer end of each track 5, or 6, being pivoted at 8, and the adjacent ends of the tracks 5, 6 being raised by a pneumatic motor 9 so that the charged basket passes over, and beneath, respectively twin lower and upper clamp arms 12, 13 on a carriage 17 located at the pick-up position, the upper clamp arms 13, which are vertically-movable by a motor 15, being in their raised position. The motors 9 and 15 are operated to lower respectively the basket 1 and the upper clamp arms 13 so that the stack of bags become clamped between the two sets of arms 12, 13. At this stage a set of bag ties can be dropped on to the stack of bags from a dispenser 16. As the carriage 17 moves out of the pick-up position along tracks 19, 20 it carries the clamped stack of bags to an overslip bag-loading station. At the latter a group of overslip bags, rest upon a platform 22 and are attached by their flaps to a wicket, the platform 22, mounted upon a carriage 24, being adjustable vertically by an increment, each time a bag is taken off the wicket. A standby carriage 24<SP>1</SP> is provided. The carriage 24 is movable to a position so that a slip-bag, opened by a current of air directed from a blower between movable guides 28, is ready to accept the stack of bags between the clamp arms 12, 13, the opening of the bag being assisted by a short blast of air from a tube 32. Continued movement of the carriage 17 carries the slip-bag and contents between upper and lower clamping members 38, 37 which are then urged together to clamp the overslip bag and contents while the carriage 17 is retracted and returned to its initial position, and the slip bag is sealed by reciprocable sealing members 34, 35. When the latter are retracted the sealed overslip bag slides off the platform 37 to be picked up by a take-out conveyer, not shown. The operation of the apparatus is controlled by an electrical-pneumatic control system, Fig. 4, not shown.