baber/WOPTO huggingface dataset:
Patent GB-217699-A (GB)
Title: Fluid level indicators or gauges for boilers & like vessels
IPC: F22B37/78
Filed: 1923-04-18
Abstract: 217,699. Rose, D. April 18, 1923. Gauge glasses and the like. - A fluid level indicator for boilers and the like comprises two cylinders 3 having means for attachment to the boilers and passageways for connection therewith, a valve 6 in each cylinder connected together bv a rod or arm 24 having a handle 25, bearing pieces or valve seatings 16 in each cylinder, and springs 19 for keeping the valves 6 and bearing pieces or seatings 16 tightly together. A gauge glass is secured to the valves s by indiarubber rings, or a chamber containing a prism may be arranged between the two valves, and on rotation of the valves an indication of the level of liquid in the vessel is given; further, the. top and bottom valves and their connections can be cleaned or the gauge glass or prism shut off from the vessel. In modifications, the valves and seatings may be flat.
Patent GB-1034701-A (GB)
Title: Process for the production of synthetic plastics from vinyl or vinylidene polymers and polyurethanes
Inventor: REISCHEL ARTUR
IPC: C08L27/06
Filed: 1964-03-12
Abstract: Homo- or co-polymers of vinyl chloride, vinyl acetate and/or vinylidene chloride are mixed with a preformed polyurethane based on aliphatic or araliphatic polyisocyanates and polyesters of M.W. 400 to 4000 at least 5 weight per cent thereof being a mixed polyester of a dicarboxylic acid and a mixture containing at least 3 mol per cent of each of two polyhydric alcohols.  The polymethane may also contain structural components derived from other polyesters, polyesteramides, polyethers, polyacetals or polythioethers or may be used in admixture with other polyurethanes.  Lists are given of suitable polyester components and polyisocyanates.  Water or polyhydric alcohols, amines or aminoalcohols, which may contain ether, ester, amide, urethane, urea or acetal groupings, may be used as chain extenders in production of the polyurethane.  The mixture may also include plasticizers or fillers.  In the examples dibutyl tin mercaptide (stabilizer); dioctyl phthalate, diphenyl tolyl phosphate, adipic acid/butanediol polyester, and butadiene/acrylonitrile copolymer (plasticizers); tetrahydrofuran (solvent); and black collodion (pigment) are used.ALSO:In examples (15) a paper web and (16) a cotton cambric fabric are coated by the roller melting process with a mixture of equal parts of suspension PVC and a polymethane from a polyester of adipic acid and a mixture of hexane-1, 6- and 2, 2-dimethylpropane-1, 3-diols and hexamethylene diisocyanate (see Division C3) at various pressures.  In example 16 the coating mixture also includes a polyester of adipic acid and 1, 3-butanediol as plasticiser.
Patent GB-138507-A (GB)
Title: An improved manhole door
IPC: F16J13/06
Filed: 1919-04-29
Abstract: 138,507. Thomson, J. S. April 29, 1919. Man-hole covers.-Consists in forming an elliptical man-hole door A with a lip D to engage with the back edge of the reinforcing-ring E of the man-hole, and with hollow screwed bosses F to receive the securing-bolts G, the whole being arranged so that no part of the door or its fasten. ings projects beyond the level of the plating C. The heads H of the bolts are circular and enlarged to engage the front edge of the ring E. They may be cut away as at M, Fig. 1, so that the door may be removed without fully unscrewing the bolts, in which case the bolt head is formed with a wedge-shaped underside, as at N. A lifting bolt P, or eye-bolt, is located in a central depression R in the cover. The cover may be dished in various ways, so that the outer face B instead of being flush with the plate C is in the rear thereof.
Patent GB-1502595-A (GB)
Title: Amplifier and sound reproduction systems
IPC: H04R3/04
Filed: 1974-03-08
Abstract: 1502595 Loud-speaker systems ARD ANSTALT 7 March 1975 [8 March 1974] 10597/74 Heading H4J In a sound reproduction system the input signal is fed through a compensating circuit 14, having a characteristic which is the inverse of the loudspeaker characteristic, to a multisection filter 20 which divides the signal into respective frequency ranges which are amplified by respective variable gain amplifiers 22, 24, 26, before application to the loud-speaker system 18. As described the signals from the variable gain amplifiers can be combined, or applied in any combination, or independently, to respective loud-speakers.
Patent GB-1002381-A (GB)
Title: Process for the production of pure, monomeric formaldehyde
IPC: C07C45/55
Filed: 1964-03-13
Abstract: Pure monomeric formaldehyde is obtained by the pyrolysis of a formaldehyde polymer as a suspension in an inert heat carrier having a boiling point of at least 200 DEG  C. in the presence of a surface-active adsorbent.  The pyrolysis is preferably carried out at a temperature from 80 DEG  to 200 DEG  C.  Suitable surface-active adsorbents are activated carbons, filled aluminium silicates, bleaching earths, active gels, synthetic decolourizing resins, silicon dioxides, and calcium silicates and mixtures of these. Suitable inert heat carriers are saturated aliphatic or cycloaliphatic hydrocarbons, halogenated benzenes and alkyl benzenes, ethers, esters, polyethers and polyesters.  If desired, an acid, which is stable under the pyrolysis conditions, may be added to neutralize any alkali present. Suitable acids are, for example, phosphoric acid, sulphuric acid, benzene-sulphonic acids, alkyl-sulphonic acids, saturated carboxylic acids, aliphatic dicarboxylic acids and hydroxycarboxylic acids, salts and partial esters of polybasic acids, sulphates and phosphates of tertiary amines and sulphimides.
Patent GB-635837-A (GB)
Title: A reciprocating pump for a hydraulic jack
IPC: B66F3/42
Filed: 1947-04-22
Abstract: 635,837. Securing handles on shafts. ALVIS, Ltd., DUNN, W. M., and VENNER, D. J. V. April 22, 1947, No. 10794. [Class 80 (ii)] [Also in Group XXVIII] A pair of oppositely inclined actuating handles 20 for operating a pump (see Group XXVIII) have hub portions 18 which are detachably secured at a convenient angular relationship on the splined end 17 of a rocking-shaft 16 by a threaded bolt 24 adapted to force the hubs outwardly to bind on the splines. The handles are detachably connected to their hubs by bayonet connections. Specification 571,074, [Group XXVIII], is referred to.
Patent GB-1104909-A (GB)
Title: Improvements in or relating to methods of manufacturing matrices and dies
IPC: B23Q35/06
Filed: 1966-03-11
Abstract: 1,104,909. Models for copying. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 11 March, 1966 [13 March, 1965], No. 10818/66. Headings B3B and B3K. A method of making a die for use in compressing or moulding a part comprises drawing or engraving a series of large-scale cross-sections of a model 1 of the part on flat non-deformable plates 4, each plate containing reference lines or apertures 6, 7, 8, the cross-sections then being transferred to a block of readily-machinable non-deformable material, shaping the block to the finished shape, and finally producing the die from the block with an appropriate reducing means. The model 1 of a hearing aid is made from balsawood, clay, &c. From the model must be made inner and outer dies for moulding upper and lower halves 2, 3. The plates 4 of methyl methacrylate are engraved to a depth of 0À6 mm. with the large scale cross-sectional outlines by a high speed cutter having a tip of 60 degrees. The crosssections are spaced by the thickness of the plates, or plates and spacers, and separate plates are made for inner and outer circumferences of the sections. The engraved plates are stacked on rods 10 and are used for copy-milling blocks of synthetic material with a series of steps. These blocks are then smoothed out by hand to produce shapes such as shown in Fig. 9. The blocks are used as models for copy-milling, down to the correct size, the actual dies in tool steel or bronze. In a modification, the cross-sections are taken along a circular arc. In a further modification, the smoothed large-scale blocks are used to form fine-grained cement coats so that no reversal of copying is required in producing the actual dies.
Patent GB-595178-A (GB)
Title: Improvements in or relating to holders for radio valves and other electric dischargedevices
IPC: H01R33/76
Filed: 1943-07-03
Abstract: 595,178. Two-part couplings ; electrostatic screens. JACKSON, D., and PYE, Ltd. July 3, 1943, Nos. 10827/43, 15845/43 and 6090/44. [Class 38 (i)] A socket holder for a thermionic valve or other plug-in device comprises an insulating body 21 containing the contacts 20 and a metal support 10, 11 that extends across one or both faces of the body 21 so as to form a screen or an electric closure for the hole in a metallic panel in which the holder is mounted. Each of the plates 10, 11 may have a cup-shaped recess 12, 13 formed with holes 14, 15 corresponding to bosses 23, 24 round the contact entry apertures 22, 26. If both plates 10, 11 do not extend completely across the surface of the body 21, one of them may have an annular flange fitting over a recessed edge of the body to retain it in the support. One of the plates may be integral with the metallic panel and one may be combined with a clip to grip a metal screening can of the valve. The external screening 12, 13 may be combined with a metallic liner 33 for the usual keyhole-shaped guide slot 32, the liner being formed from a strip bent to polygonal form and having tags 34 that are bent over and soldered to the top and bottom of the screening 12, 13 or, where one of the screening surfaces is omitted, one set of tags 34 are gripped between the remaining screening surface and the body 21. Transverse screens embedded in the insulating body as described in Specification 595,185 may be attached to the surface screening or formed integral with it and may be moulded into the insulation or located between separate sectors of insulation built up as described in Specification 595,187. In one form the surface screening may be bent into folds that extend upwards and downwards between the body sectors to form a substantially continuous radial screen. The contacts may be formed as described in Specification 595,186 by folding a strip to provide a soldering tag 28, contact grips 30 and securing tags 31 located in holes 22 having a wide upper part 25 and a narrow lower part 26 with locating shoulders 27 between them. When certain contacts are to be earthed, the soldering tags 28 may be bent over and soldered to the screen, or to tags bent up from the screen, or the lower screening plate may be formed with recesses to fit over and enclose the bosses 23 having holes only large enough for the passage of the tags 28 which are then soldered in the holes.
Patent GB-417940-A (GB)
Title: Improvements in or relating to windscreen wipers
IPC: B60S1/20
Filed: 1933-04-11
Abstract: 417,940. Tensioning driving belts. JABLONSKY, B., 59, Liebnizstrasse, Charlottenburg, Berlin. April 11, 1933, No. 10874. Convention date, April 11, 1932. [Class 80 (i).] The Specification as open to inspection under Sect. 91 comprises the provision of one or more torsion springs for maintaining stretched an endless driving band employed in the reciprocation of a windscreen cleaner. An idler roller supporting the driving band is carried by a slide having a projecting pin on which is mounted a torsion spring z<1> of the form shown in Fig. 6 (Cancelled), the projecting portions of which are inserted in holes in a casing, with the spring under tension, so that the spring acts to keep the driving band taut. In a modification, two torsion springs one surrounding the other, are mounted on the projecting pin, each secured at one end to the pin, and the other end being inserted in an opening in the casing. In a further modification, Fig. 8 (Cancelled), two spiral springs are secured to the pin x, the ends p<1> engaging in openings in the casing. This subject-matter does not appear in the Specification as accepted.
Patent GB-1482889-A (GB)
Title: Rock bolt
IPC: E21D20/02
Filed: 1976-03-18
Abstract: 1482889 Anchoring bolts BERGWERKSVERBAND GmbH 18 March 1976 [18 March 1975] 10912/76 Heading F2H A rock bolt has end portions 200, 201 for fixing to or engaging the rock 10, a tie rod 2 connecting the end portions together, and a slip coupling between the ends that allows the ends to move apart under excessive loads due to shifting of the rock strata, while being sufficiently rigid not to slip under normal loads. In Fig. 1, the end 200 of the tie rod 2 is secured to the rock by adhesive 8 while the end 201 is threaded to receive a nut 12 which bears on a facing plate 11. The tie rod comprises two portions 26, 27 with overlapping slidable portions 28, 29 held together by rings 35, 36. Abutments 33, 34 on the portions 28, 29 limit the extent of sliding movement which occurs on overload. In Fig. 2, a gripping element 3 secured to the tie rod 2 engages a friction lining 5 of an anchor tube 4 which is secured to the rock by adhesive 8. The outer end of the tube 4 tapers radially inwardly at 14, to guide the tie rod via a seal 15. The inner end of the tube is closed by a plate 6, which may have a cutting crown 7 to expedite penetration of the rock bolt into the adhesive 8. A key 161 prevents relative rotation between the tube 4 and the tie rod 2 while the rock bolt is being installed. The gripping element 3 may be cylindrical, conical (Fig. 3, not shown), or an expander wedge (19) (Fig. 4, not shown) to expand the inner end of the rod 2 against the tube 4. In Fig. 5, a long tube 40 with a friction liner 5 is secured at its ends to the rock by adhesive 8, a sleeve 22 isolating the middle part of the tube from the adhesive. The tie rod 2 is frictionally connected at its ends to the ends of the tube 40 by gripping elements 30, 31. A cap 23 at the outer end of the tube 40 is keyed thereto at 164. The middle of the tube 40 is weakened by a notch 20 to enable the two halves of the tube to separate at a predetermined load. Instead of friction slip couplings, hydraulic or shear type couplings may be used.
Patent GB-832336-A (GB)
Title: Improvements in or relating to optical systems for projecting stereo slides
IPC: G03B35/20
Filed: 1958-04-08
Abstract: 832,336. Stereo-slide projectors. KODAK Ltd. April 8, 1958 [April 9, 1957], No. 11036/58. Class 97(1) . A stereo-slide projector comprises two juxtaposed lenses, means to hold the slides in a viewing position, means for illuminating said slides, a polarizing filter consisting of two sheets of polarizers with their planes of polarization mutually at right angles which is rotatable through 45 degrees about an axis parallel to axes of lenses and between them so that the planes of polarization may be either at 45 degrees to mutual plane of the lenses (position "one") or respectively parallel and perpendicular to said plane (position "two"). The stereo-slide projector shown in Fig. 1 has juxtaposed lenses 15, 17 of which lens 17 is transversely movable by a toggle rod 45 to register on a screen the projected images of a slide 30 disposed in the picture gate. During projection, the pictures on the slide are respectively illuminated by light passing through filters 71, 72 (Fig. 7) having their polarizing axes orthogonal and at 45 degrees to the plane common to the lens axes, these filters being carried by a mount 55 rotatable about an axis intermediate and parallel to the lens axes. When it is necessary to correct the image registration on the screen, the mount 55 may be rotated through 45 degrees so that the polarizing axes are then respectively parallel and perpendicular to the plane common to the lens axes. Such movement is effected by the slide changing mechanism, Fig. 5, comprising a plate 100 which, on being pushed downwardly, forces the next slide past catch springs 115 and into engagement with a spring 116 for holding the slide in the picture gate, and also engages. a lug 54 on filter mount 55 so that the latter rotates through 45 degrees to the new position in which it is held by a pivoted latch 58. On withdrawal of the plate 100, the last projected slide 30 is ejected. By operating toggle rod 45, the projected images of the new slide can now be registered on the screen and thereafter the filter mount 55 is returned to its operative position by pressing a button 64 on a rod 65, slidable within the toggle rod 45, whereby a disc 69 is moved to release the latch 58. Speci. fication 832,335 is referred to.
Patent GB-177421-A (GB)
Title: An improved foldable pocket umbrella
IPC: A45B19/10
Filed: 1921-04-18
Abstract: 177,421. Balogh, K., Balogh, K., and Balogh, S., (trading as Balogh Ús FivÚrei, K.). April 18, 1921. Pocket, folding, telescopic, and like umbrellas. - Comprises a pocket umbrella having a telescopic stick and foldable ribs, adapted to be opened by the action of extending the stick and to be closed by the reverse action. The stick comprises a tube b, slidable in a tube c carrying a crown k to which the ribs are hinged. The ribs comprise two parts e f, hinged at g to a link h, which has shoulders i serving to support the ribs when extended; the links also prevent the covering p from being pinched or damaged at the rib joints. Hinged at o to the rib parts e are stretchers m; these are pivoted at their other ends to a sliding ring n, which when moved along the tube c to the position n<1> closes the umbrella. The ring carries a cross-pin u slidable in a slot t in the tube c, and the pin carries a link v, located inside the tube and having a slot x. Engaging the slot x is a pin y carried by the tube b; on pulling out the tube b, the pin y moves along the slot until it engages the end y<11> thereof, further movement of the tube moving the ring n and opening the umbrella. The tube b is retained in the extended position by a catch d. A knob r having recesses s is provided on the tube b to accommodate the links h when the umbrella is closed. A wrapper is placed over the cover p when closed up.
Patent GB-1078170-A (GB)
Title: Boring machine
IPC: G05B19/23
Filed: 1966-03-15
Abstract: 1,078,170. Boring. EX-GELL-O CORPORATION. March 15, 1966 [April 16, 1965,] No. 11258/66. Heading B3C. [Also in Division  G3] In a numerically controlled system for a boring machine the commanded radial position  ing of a boring tool is modified by a compensation signal determined from measurement of a bored hole. The determined decimal compensation is set up on a decimal switch, Fig. 3, (not shown), incorporating a plurality of AND-gates whereby a binary coded compensation signal is fed to a 'boring -axis 'register 15, whence it is combined with a command signal. The output of the register 15 is applied to a control 19 for a drive 28<SP>1</SP> radially pesitioning a cutter 25, 26 by a bell-crank arrangement 27. The radial position of the cutter is determined by a transducer 30 the output of which counts down the register 15, the drive 28<SP>1</SP> being stopped when the cutter is at the actual commanded diameter
Patent GB-450351-A (GB)
Title: Grid-current detector for television purposes
IPC: H03D1/16
Filed: 1934-11-10
Abstract: 450,351. Thermionic valves ; circuits for wireless reception. RADIOAKT.-GES. D. S. LOEWE, 10, Wiesenweg, Steglitz, Berlin. Nov. 10, 1934, No. 11261/36. Convention date, Nov. 10, 1933. Divided out of 450,241. [Classes 39 (i) and 40 (v)] A grid-current detector particularly for use in television, comprises a valve having control electrodes insulated completely or incompletely from the inner electronic discharge space and furnished with a conductive layer arranged in the insulating coating. The Figure shows a push-pull detector valve having a of grids 20, 21 which are insulated from the electronic discharge space and provided with a conductive layer 24 on the insulating coating. The grids co-operate with a common cathode and are of similar construction and have the same amplification factor. The leak resistance 25 may be provided inside or outside the valve envelope and in the former case may be provided by making the insulating coating slightly conductive. With these arrangements, the mid-point of the input circuit can be directly earthed to give symmetry and thus remove the carrier frequency from the output circuit. The direct connection of the grids to the input circuit avoids the loss in the coupling condensers and with the reduced input capacity a larger value of grid leak may be employed. Specifications 435,417, 447,401, 449,466, and 450,241 are referred to.
Patent GB-1162301-A (GB)
Title: Portable Centrifuge
Inventor: LUCKHAM DENIS COMPTON
IPC: B04B5/04
Filed: 1967-03-10
Abstract: 1,162,301. Portable centrifuge. LUCKHAM Ltd. 7 March, 1968 [10 March, 1967], No. 11341/67. Heading B2P. A motor-driven centrifuge, e.g. for treating blood samples, comprises a hollow, frustoconical rotor 11, e.g. of nylon, closed at its upper small diameter end by means of an integral platform 12 and mounted on the motor spindle 16 by means of a soft resilient bush 15, e.g. of rubber or synthetic plastics, which is press-fitted onto the spindle a number of bores 13 equally spaced around the axis of the rotor passing downwardly through its wall to accommodate test-tubes carrying samples to be centrifuged. At high speed, 3,000-7,000 r.p.m., any unbalance in the rotor is taken by the resilience of the bush 15 which also acts as a friction drive for the rotor. A rim 14 is formed around the top of the rotor to reduce wind resistance caused by the testtubes when running. An upper panel 18 of the centrifuge apparatus is fitted with a cover 20 and has an aperture 21 containing a magnifying lens which, together with a lamp located below a piece of translucent glass in an aperture in the top panel 23 of a box 24, is used for examining specimens of blood. The motor may be an electric motor operated either from a 6 V or 12 V battery, which may be that of a motor vehicle or a dry battery contained in the box 24, or from a transformer and rectifier operated from a public electricity supply. Alternatively, the motor may be a spring- driven motor which may have a variable speed and which may be fitted with a speed governor. The spring may have just sufficient power, when fully wound, to complete one desired centrifuging operation.