baber/WOPTO huggingface dataset:
Patent GB-1478869-A (GB)
Title: Typewriter ribbon conveying mechanism
IPC: B41J33/516
Filed: 1974-11-19
Abstract: 1478869 Ink ribbon mechanism HERMES PRECISA INTERNATIONAL SA 19 Nov 1974 [20 Nov 1973] 50114/74 Heading B6F A typewriter having a print head carriage traversing a platen has a plate 1 attached to the carriage (not shown) and a cassette support 2 pivotally mounted at 8 on the plate 1. The ink ribbon cassette is of the reel-to-reel type and engages hubs 4g, 4d mounted on the support 2. Automatic ribbon reversal is caused by pivoting of the support when the ribbon reel on the supply hub, 4g as shown, is exhausted. As shown each hub 4g, 4d is driven by a pawl 18g, 18d engaging a toothed wheel 7g, 7d. The pawls 18g, 18d are respectively pivotally mounted on arms 14, 15 pivoted at 16, 17. The arms 14, 15 are both engaged by peg 13 on lever 11 mounted at 12. Movement of the print head (not shown) is transmitted by lever 33 to the lever 11 and thereby to the pawls 18g, 18d simultaneously. A stirrup 21, slidable between two positions defined by pins 22 in slots 23 and biased into both by over centre C-spring, selectively disengages one of the pawls 18g and a ratchet blade 25g to permit hub 4g to freely rotate, thus hub 4d only is driven. When the ink ribbon is fully wound in this direction hub 4d will refuse to rotate and so the engagement of the pawl 18d and wheel 7d pivots the support 2. This causes the C-spring 24 to move the strirup 21 into its other position thus disengaging the pawl 18d and blade 25d and permitting the pawl 18g and blade 25g to engage wheel 4g.
Patent GB-1281052-A (GB)
Title: Maximum allowable air speed indicating means
Inventor: ANDRESEN JOHN H
IPC: G01P1/10
Filed: 1969-10-14
Abstract: 1281052 Maximum speed indicator INTERCONTINENTAL DYNAMICS CORP 14 Oct 1969 50304/69 Heading G1N A maximum permissible air-speed indicator comprises a first shaft 47 rotationally responsive to aircraft altitude to drive the wiper 46 of a first potentiometer 11, the resistance winding of which is provided with a plurality of tapping points electrically connected to a plurality of parallelconnected potentiometers 22-31, the wiper 34 of each of which is preset so as to establish a non- linear A. C. voltage distribution, according to a desired altitude V.S. speed characteristic, Fig. 1 across the first potentiometer, a second potentiometer 12 being connected in parallel with the parellel potentiometers and having a wiper 53 driven by a second shaft 54 rotationally responsive to aircraft speed. In use a warning device 15 is actuated by a signal from the discriminator 13 when the voltage at the wiper of the speed-responsive potentiometer exceeds that from the altituderesponsive potentiometer.
Patent GB-1225009-A (GB)
Title: An improved device for receiving, guiding and folding a continuous web of precreased material
Inventor: MULLER ROBERT DONALD
IPC: B65H45/101
Filed: 1968-10-23
Abstract: 1,225,009. Folding apparatus. GAF CORP. 23 Oct., 1968 [25 Oct., 1967], No. 50409/68. Heading B8R. A transversely creased web W of sensitized material, leaving the developer station 26 of a copying machine is guided into a receptacle 52 where it is folded by projections 56, 62 into a fan-folded stack. The guide may be either a series of parallel guide strips 36, 38, 44, 46, Fig. 2, or a pair of driven co-operating endless conveyer belts 82, 84, and arcuate guide plates 92, 94, Fig. 4.
Patent GB-1316339-A (GB)
Title: Optical isolator comprising an optical interferometer
IPC: G02F1/09
Filed: 1970-10-23
Abstract: 1316339 Interferometric optical isolator UNITED AIRCRAFT CORP 23 Oct 1970 [10 Nov 1969] 50415/70 Heading G2J An interferometric device has directional anisotropy within the optical path so that the path length for light travelling in one direction differs from light travelling in the other direction. As shown, semi-reflecting mirrors 12, 14 and reflecting mirror 16 are arranged to provide a closed loop path for light. In one arm is disposed Faraday rotator 18 and quarter wave plates 20, 22. Light travelling in the direction shown by the arrows is passed, but due to the difference in path length inherent in the Faraday rotator, light travelling in the opposite direction is not passed. This may be used to isolate a source laser from other apparatus, e.g. a laser amplifier or an antenna arrangement. The Faraday rotator arrangement may be replaced by a material which has a different refractive index for waves travelling in opposite directions.
Patent GB-1379513-A (GB)
Title: Bonding
Inventor: LUC P J V
IPC: B23K20/00
Filed: 1970-10-23
Abstract: 1379513 Welding by pressure; jointing P J V LUC 17 Jan 1972 [23 Oct 1970 14 Dec 1970] 50494/70 and 59366/70 Addition to 1224891 Headings B3R and B3V In a method of forming a joint, particularly a side lap-seam joint in a can or drum, the periphery of a high-speed rotary wheel is pressed into rubbing contact with a surface in closely spaced relation with the joint surfaces, the frictional heating, pressure and rubbing action combining to effect an adhesive or cohesive bond without fusion of the joint surfaces. The lapped workpieces may be subjected to auxiliary treatment such as sonic or ultrasonic vibrations applied, e.g. through a backing wheel or member opposite the rubbing wheel, or to electrical or dielectric heating or electrical arc or corona discharge. The rubbing wheel is normally applied to a surface of one of the parts to be joined but where damage to the surface might arise, e.g. in the case of a thin metal foil an interlayer of material, e.g. of P.T.F.E. which will not become bonded to the foil may be used. The process may be used to effect metal to metal bonds and reference is made to bonding tinplate, rolled steel, steel coated with a protective coating of chromium and chromium oxide or chromium phosphate or rhodium (removal of the coating being unnecessary) and aluminium foil to tinplate. A bond may be formed between metal parts using an interlayer of thermoplastic or thermosetting material deposited in liquid, film or particulate form or of solder and specific examples are given of bonding aluminium parts or tinplate parts with a nylon interlayer. An example is given of forming a can seam using a ribbon of solder between the tinplate surfaces. In apparatus for forming a can body a hardened. steel wheel 11 operates in a gap 7 of a jig 6 in which a can body having overlapping ends 9 is mounted on an expansible mandrel 10. The jig is traversable on rails 14 past the wheel 11.
Patent GB-507175-A (GB)
Abstract: 507,175. Preserving animal substances. I. G. FARBENINDUSTRIE AKT. GES. Dec. 10, 1937, No. 34269. Convention date, Dec. 11, 1936. [Class 49] [Also in Groups IV and XX] Masses for embedding specimens or tissues are produced by an acid condensation of urea and/or thiourea with formaldehyde in the presence of a polyhydric alcohol or partial ester or ether thereof, or of sugar and water, water being distilled off during and after condensation and the final water content of the resin being between about 10 and 50 per cent. At least two molecules of formaldehyde per mol of urea are employed, the amount of polyhydric alcohol &c. being from a half to four times the weight of urea. In examples : (1) a solution of urea in aqueous formaldehyde is allowed to flow, under reduced pressure, into glycerine in which is dissolved a small amount of phthalic anhydride, the temperature being maintained at 70-75‹ C. and water being vaporized continuously ; the resulting resin is diluted with alcohol to a dry resin content of 75 per cent, a little aqueous oxalic acid solution is added and the solution is degasefied under reduced pressure and allowed, to flow into a display glass in which is arranged, e.g. a bunch of heather, the filled glass being sealed with rubber; (2) a similar solution is employed to embed a rabbit's liver, the liver being first soaked in the solution, then partly embedded in an acidified solution, the remainder being added after solidification of the first portion; (3) a resin solution is prepared from urea dissolved in aqueous formaldehyde and a glycol mixture, consisting mainly of monodiglycol ether, with a little adipic acid and employed as in (1) and (2) ; (4) a resin solution prepared from urea, thiourea and aqueous formaldehyde is worked up with a solution of sugar.
Patent GB-1276906-A (GB)
Title: Improvements in or relating to apparatus for the continuous production of bodies from plastics granules
IPC: B29C44/46
Filed: 1969-10-20
Abstract: 1276906 Continuous casting of expanded bodies ISOLERINGSAKTIEBOLAGET WMB 20 Oct 1969 [23 Oct 1968] 51288/69 Heading B5A Apparatus for the continuous production of bodies from expandable thermoplastic granules comprises a channel defined by upper and lower endless belts respectively, a container to distribute the granules and mounted on a table at the same level as the lower belt forming a layer on the intake side of the channel and a rotatable driven feed roller above the table determining the height of the layer of granules before it passes between the belts. As shown in Fig. 1, the channel 18 is defined by belts 10, 14 on drums 12, 16 respectively, and fed from hopper 24 past feed roller 26, the table being formed by the projecting portion of the lower belt 10. The feed roller 26 is driven from drum 16 through belts 44, 52, 56 and pulleys 36, 38, 48, 49, 50, 54, the pulleys 48-50 together forming speed variator 47 by which means the rotational speed of roller 26 is controlled. This is achieved by moving the central pulley 49 to the right or left relative to fixed pulleys 48, 50 by means of hand wheel 58 to increase or decrease the speed. The height of feed roller 26 is adjustable by hand wheel 32. The feed roller 26 preferably has a helical thread 60 extending oppositely from its centre, forming driving means.
Patent GB-1411772-A (GB)
Title: Web dryer
IPC: D21F5/04
Filed: 1972-11-07
Abstract: 1411772 Drying of webs BELOIT CORP 7 Nov 1972 [17 Dec 1971] 51382/72 Heading F4G  A paper web W is supported in its sinuous path around heated dryer drums 12-15 and 16-18 etc. by means of one or other of two pervious endless felts 20 and 21, the web W being transferred from one felt to the other at guide rollers 24-28, the arrangement of guide rollers 24-28 being such that air entrained with the web W at A is removed from between the web W and upper felt 20 by sub-atmospheric pressure created at B, so as to prevent flutter of the web W in the run 20a. Similar effects are produced at C and D. Air entrained at 21a with the lower surface of the lower felt 21 positively pressurizes the space 36 causing air to flow through the lower felt 21 into the pocket 30 so as to assist in separating the web W from the lower felt 21 and hold the web W against the upper felt 20 in the run 20a. Moisture-laden air is removed from the ends of the pockets 30-33 by conduits 30a-33a. The guide rollers 24-28 (e.g. 25) may be suction rollers and each comprise a perforated shell and a movable suction baffle, for removing air from A-D. The air passing through the felts may dry the felts completely, but other felt dryers may be provided. The felts are guided and tensioned by rollers (not shown), and felt cleaners may be provided.
Patent GB-1411559-A (GB)
Title: Reversible rotary sliding vane hydraulic motor
IPC: F01C21/08
Filed: 1972-11-09
Abstract: 1411559 Rotary positive-displacement fluidmachines PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 9 Nov 1972 [12 Nov 1971] 51758/72 Heading F1F In a reversible sliding-vane type hydraulic motor a fixed ring 6 has a cam surface 7 defining with a rotor 2 a series of chambers 8, the vanes 5 having a loose fit in slots 3 extending radially from pressure-loading chambers 4, and radial flow-paths being provided between the side faces of each vane and the side walls of the respective slot so as to regulate the pressure in the associated chamber 4. The flow-paths may be constituted by shallow grooves 17. Each vane may also be loaded radially by compression springs (14), Fig. 2 (not shown). Working fluid enters the chambers 8 through an annular channel 9 and recesses 10, the spent fluid being ejected by way of recesses 11. The chambers 4 may be pressurized, while the vanes traverse the recesses 10 from the channel 9 through ducts 12.
Patent GB-1419635-A (GB)
Title: Waveguide filters electronic circuit for activating
IPC: H01P1/207
Filed: 1972-11-11
Abstract: 1419635 Band-separation filters MARCONI CO Ltd 25 Oct 1973 [11 Nov 1972] 52189/72 Heading H1W A waveguide band-separation filter 13 comprises two channels 1, 2 which taper from input ports 3, 4 to a minimum cross-section corresponding to a chosen cut-off frequency, and expand from the minimum cross-section to the output ports 5, 6. The tapers 7 from the input port 3 and the output port 6 may be designed in accordance with a cos<SP>2</SP> law. The tapers 8 from the input port 4 and the output port 5 are designed such that for any frequency in the reflected band the distance of the point of cut-off from the input or output port is greater than the corresponding distance in tapers 7 by one quarter wavelength. Hence the reflected waves suffer a 180 degrees differential phase-shift and the transmitted waves are substantially unaffected. The channels 1, 2 may be of semicircular cross-section and (as shown) are connected to a coupler 12, and to a bifurcation 11. Wave energy in the circular electric TE<SP>0</SP> 01  mode at the input 14 of the bifurcation is divided in antiphase between the (semicircular) channels 17, 18 of the coupler and passes unaffected into the filter 13. The reflected waves are in phase in the coupler channels 17, 18 and hence are coupled into the rectangular waveguide 19.
Patent GB-1421473-A (GB)
Title: Thermally insulative structure
IPC: B30B15/06
Filed: 1973-11-09
Abstract: 1421473 Insulating moulds in presses LE JOINT FRANCAIS 9 Nov 1973 [9 Nov 1972] 52232/73 Heading B5A [Also in Division F2] A thermally insulative structure for thermally insulating two spaced walls, e.g. for thermally insulating the heating plate 9 of a moulding press from the bearing bar 4 to which it is fixed, comprises several studs 11 of polyimide filled with elongate glass fibres inserted in openings formed in a thermally insulating screen 10 of, e.g. fibro-cement, the thickness of which is less than the height of the studs. The heating plate 9 bears a mould 8 and is fixed to the bearing bar 4 by means of rods 12. The height of the studs 11 is preferably less than their diameter. The structure is stable at a temperature of 200‹ C. and no deformation is observed when repeated pressures of 300 to 400 bars are applied. The press described is intended for the moulding of elastomers and thermosetting materials.
Patent GB-1079000-A (GB)
Title: Improvements in pulse generating means utilizing delay timed master to control delay timed slaves
IPC: H03K5/00
Filed: 1965-12-09
Abstract: 1,079,000. Semi-conductor pulse circuits. GENERAL ELECTRIC CO. Dec. 9, 1965 [Dec. 14, 1964], No. 52246/65. Heading H3T. [Also in Division H2] A network for generating a series of pulses comprises a master pulse generator which includes a variable time delay circuit to cause the master pulse at the end of a time interval from a given instant, the time interval being determined by the variable time delay circuit, the network further comprising a slave pulse generator for generating an initial slave pulse upon the occurrence of a master pulse, the slave pulse generator including a fixed time delay circuit which is activated by the occurrence of the initial slave pulse to cause the slave pulse generator to provide a further slave pulse at the end of a time interval determined by the fixed time delay circuit. The occurrence of the master pulse also causes the production, after a fixed time delay, of a pulse in a second slave pulse generator and the occurrence of this latter pulse causes the production of two pulses in a third slave pulse generator in a similar manner as those produced in the first slave pulse generator by the occurrence of the master pulse. As shown, closure of a mechanical or electronic switch 74 causes capacitor 76 to charge at a rate determined by variable resistors 66, 68 until unijunction transistor 576 breaks down, turning on transistor 82 and discharging capacitor 90 through the primary of an air-cored transformer 86. The supply to transistors 576, 82 is now removed by thyristors 98 triggered by the secondary 100 of transformer 86. Thyristor 124 in slave pulse generator I is triggered by a pulse from a further secondary winding 128 of transformer 86 via a now-closed switch 130 thus allowing capacitor 158 to charge via variable resistor 154 until unijunction transistor 151 breaks down, turning on transistor 167 and discharging a capacitor 172 into the primary winding 166 of transformer 168. A pulse in secondary winding 184 of transformer 168 triggers thyristor 182 which turns off thyristor 124 by discharging capacitor 176 via its anode/ cathode path. The current in resistor 180 is insufficient to maintain conduction in thyristor 182. Thyristor 124 in slave pulse generator II is triggered by a pulse from the secondary winding 196 of transformer 122 to initiate a further stage. Further slave pulse generators are similarly triggered, the relative timing of their outputs being such as to be suitable for triggering six-phase ignitrons in a welding system (see Division H2).
Patent GB-1022520-A (GB)
Title: Process for the chloromethylation of polymers of aromatic vinyl or vinylidene compounds
IPC: B01J41/14
Filed: 1964-12-23
Abstract: Polymers of aromatic vinyl or vinylidene compounds are chloromethylated by reaction at 20-100 DEG  C. in the presence of a Friedel-Crafts catalyst with the reaction product of sulphonyl chloride (1 mol) and methylal (1-3 mols).  The polymers may be polystyrene or a copolymer of styrene or p-vinyl toluene and divinylbenzene, ethyl vinyl benzene, or ethylene glycol dimethacrylate and may be in bead form. The catalyst may be stannic, zinc or aluminium chloride.  The reaction period may be 5-20 hours. The polymer may be first swollen in 2-4 times its weight of the chloromethylating agent, or alternatively in methylal and the sulphuryl chloride is then added while the polymer is cooled, and the catalyst is then added. The chloromethylated polymer may be reacted with amines, e.g. trimethylamine, to form anion exchangers.
Patent GB-1455712-A (GB)
Title: Methods of testing the transmission quality of a telecommuni cations transmission system
IPC: H04B3/46
Filed: 1973-11-12
Abstract: 1455712 Testing a telecommunication channel SIEMENS-ALBIS AG 12 Nov 1973 [6 Dec 1972] 52353/73 Heading G1U In a method of testing a telecommunications channel, a test signal which covers the entire dynamic range of the channel is injected into the transmitter, and the resulting signal S1, Figs. 2 and 3, at the receiver is passed via a monitoring network N to a comparison unit P where it is compared K with a signal S6 derived from itself. As described a bi-polar exponentially decaying signal is applied to the channel and for a perfect channel the received signal S1, Fig. 3a, will be identical to the transmitted signal, whilst for an imperfect channel the received signal S1, Fig. 3b, will exhibit deformities. The received signal S1 is integrated 1, Fig. 2, and inverted V1, the result is added A to the received signal, and the sum signal S3 is filtered H 1 and rectified G to produce a signal S5 which is fed to the comparison unit P. For a perfect channel the signal S5 should be constant as shown in Fig. 3a, but for an imperfect system it will contain irregularities as shown in Fig. 3b. The presence of such irregularities is detected, in the comparison unit, by comparing the signal S5 with a signal S6 obtained by subtracting D the high frequency components of the signal S5 from itself, and the resulting signal S7 is indicative of the overall quality of the channel.
Patent GB-1425018-A (GB)
Title: Fittings for wiring of buildings
IPC: B65D85/00
Filed: 1972-11-15
Abstract: 1425018 Packaging BICC Ltd 14 Feb 1974 [15 Nov 1972] 52829/72 Heading B8C [Also in Division H2] An electric fitting, which when mounted in use has part of its housing exposed, has that part enclosed in a protective packaging cover detachably secured and reattachable to the housing. The protective packaging cover 6 for a switch cover-plate 2 is of moulded sheet P.V.C. and has a protrusion 9 around its rim 7 which snap fits around the switch. Recesses 10, 11 accommodate fixing screws and a rocker of the switch. A plurality of covers may be detachably joined together by a perforated portion for use in bulk packing of switches in a box. The cover 6 is removed from the switch plate 2 while the latter is mounted and then replaced to provide protection, e.g. during subsequent operations.
Patent GB-1404765-A (GB)
Title: Hinges
IPC: E05D11/08
Filed: 1971-11-13
Abstract: 1404765 Hinges ARTHUR SHAW MFG Ltd 24 Oct 1972 [13 Nov 1971] 52831/71 Heading E2F [Also in Division F2] A hinge, for use in hanging a centrally pivoted window within a fixed frame, comprises two relatively rotatable components 1, 2, die cast from an aluminium or zinc base alloy, and a plastics bearing assembly 11 received in a housing 5; a layer of copper 5a providing a bearing surface within the housing. In the embodiment shown the plastics assembly 11 is non-rotatably mounted on the component 1, the housing 5 is formed entirely in the component 2, and the copper layer 5a is flash plated onto the housing surface; a sleeve 16 being adjustable by screw 17 to expand the assembly 11 against the housing to prevent relative movement of the components if required. However both components can be rotatable about the bearing, assembly and each cam define a copper lined housing portion. The layer 5a can comprise a copper or copper plated sleeve or bushing fitted in the housing. The bearing assembly 11 is a moulding of low-friction plastics such as P.T.F.E., polypropylene, nylon, or acetyl resin and may include fillers such as graphite, kieselguhr, or metal powders. Attachment flanges 3 are provided with counter-sunk fixing holes (4, Fig. 2, not shown). Specification 1245573 is referred to.
Patent GB-531194-A (GB)
Abstract: 531,194. Wetting &c. agents. GREENHALGH, R., McKAY, W. B., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. June 29, 1939, No. 18999. [Classes 2 (iii) and 15 (ii)] New compositions having wetting, foaming and cleansing properties in aqueous solutions are manufactured by treating the entire alcoholic product obtainable by reduction of the fats isolated from the fruits of the plants of the genus Irvingia, or by reduction of the corresponding fatty acids themselves, or by reduction of esters of these acids other than the glycerides, with sulphuric acid, chlorsulphonic acid or other sulphating agent and then neutralizing the reaction mixture with alkali, ammonia, trimethanolamine or other amine. Suitable species of the genus Irvingia mentioned as starting materials are I. gabonensis, I. Oliveri, I. malayana, I. Smithii, I. robur and I. Harmandiana. In the example, the reduction product obtained from the fat isolated from the kernels of the nuts of I. gabonensis is treated with chlorsulphonic acid and the resulting mixture is treated with caustic soda to give a product which dissolves in water to give a solution having good wetting, foaming and cleansing properties. The reduction product is obtained from the fat by treating with metallic sodium and an alcohol or with hydrogen in the presence of an hydrogenating agent.
Patent GB-1168636-A (GB)
Title: Process for the Production of Cold-Rolled Steel Plate.
IPC: C21D8/04
Filed: 1966-11-28
Abstract: 1,168,636. Making steel plate; altering physical structure. YAWATA IRON & STEEL CO. Ltd. 28 Nov., 1966 [30 Nov., 1965], No. 53128/66. Headings B3A and B3V. A low yield point and a non-strain ageing steel containing below 0À12% C, below 0À6% Mn and 0À01-0À15% V is formed by first coiling hot rolled plate at 680-760‹ C. followed by cold rolling and annealing at 630-730‹ C. and finally temper rolling the annealed plate.