baber/WOPTO huggingface dataset:
Patent GB-428285-A (GB)
Title: Improvements in or relating to thermionic valve and like circuit arrangements
IPC: H04B1/16
Filed: 1933-10-10
Abstract: 428,285. Valve circuits for wireless reception. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. Oct. 10, 1933, No. 27925. Convention date, Oct. 10, 1932. [Classes 39 (i) and 40 (v)] A back-coupled valve 3, Fig. 2, or equivalent negative-resistance device, used in combination with an amplifier valve 1 is so arranged that its damping effect on a tuned circuit 2 remains independent of any change in the applied grid-bias, say for automatic volume control. Fig. 4 is a onevalve equivalent, in which the electrodes on the left-hand side of the bulb are differently designed to those on the right-hand side, so that in the former case they function as a screen-grid amplifier having a constant internal resistance over a wide range of grid bias, and in the latter as a space-charge grid valve backcoupled to introduce negative resistance. Fig. 7 is a similar two-sided arrangement comprising five grids. In Fig. 5 the right-hand half of the valve introduces negative resistance by dynatron action. In Fig. 9, the left-hand half of the valve 13 serves as a variable-mu S.G. amplifier, whilst the right-hand half acts as a space-charge grid negative-resistance device which maintains the selectivity of the tuned circuit L constant, irrespective of changes in the volume-control bias applied to the amplifier from a resistance 7 in the output circuit of the rectifier D. Specifications 423,167 and 424,792 are referred to.
Patent GB-1014600-A (GB)
Title: Apparatus for producing glass fibre products
IPC: C03B37/065
Filed: 1963-07-15
Abstract: <PICT:1014600/C1/1> <PICT:1014600/C1/2> An apparatus for producing glass fibres comprises a bushing 10 having a plurality of orifices through which streams of glass are discharged for drawing into primary fibres by means 16, 18, and a comb 20 for separating the fibres, the comb having a plurality of spaced flexible teeth 32, alternate teeth being of greater length than the other teeth to permit easy threading of the fibres.  A comb 24 may be interposed between the bushing 10 and the comb 20, near to the bushing, for gathering the fibres into a predetermined lateral area.  The fibres then pass over an idler roller 25, through the comb 20, and then through a lower guide means 22 into a hot gaseous blast supplied from a means 26 closely adjacent the lower guide means for attenuating the primary fibres into small diameter fibres which are collected on a moving foraminous conveyer 28 as a blanket or mat for subsequent processing.  The lower guide means is a fixed position rotatable cylindrical member having grooves around its periphery corresponding in spacing with the spaces between the pins 32 of the comb 20.
Patent GB-364012-A (GB)
Title: Face milling tool for cutting gears having curved teeth
IPC: B23F21/24
Filed: 1930-09-19
Abstract: 364,012. Gear-cutting. SOC. GENERALE INGRANAGGI E MACCHINE PER INGRANAGGI MAMMANO, 35, Foro Bonaparte, Milan, Italy. Sept. 19, 1930, No. 28080. Convention date, Sept. 19, 1929. [Class 83 (iii).] Milling-cutters.-In a process for generating spur or bevel gears having teeth of longitudinally cycloidal form, wherein the gear blank is rotated continuously in unison with a tool which rotates continuously about an axis normal to the pitch plane of an imaginary rack or crown wheel engaging the blank, the tool comprises a plurality of cutters each having a predetermined finishing point on its cutting edge, all the finishing points being equidistant from the tool axis but varying as to location in an axial direction. In this way all the longitudinal generators of the tooth flank such as H, I, K and H<1>, I<1>, K<1> in Fig. 1 are superposable curves. In operation the cutter shown in Fig. 2 rotates through one revolution while the blank, mounted so that its pitch cylinder touches the pitch surface p, p<1>, Fig. 3, of the cutter rotates through one pitch. The depth feed is effected by a superposed rolling movement of the blank on the pitch plane of the tool. All the finishing points of the cutter teeth lie along the dotted circle in Fig. 2. From A to C which corresponds to the movement of the cutter over one flank of a tooth space, the cutters lie outside this circle, while from E to G which corresponds to the movement of the cutter over the opposite flank of the same tooth space the cutters lie inside the circle. Fig. 3 shows the varying axial positions of the cutter finishing points. The form of the curve A B C depends upon the profile of the teeth to be produced. For involute profiles the line A B C in Fig. 2 forms part of a helix which gives a straight line development in Fig. 3. By suitable modification of the tooth line A B C, cycloidal teeth may be cut. In some cases the profile of individual cutter teeth may be as shown in Fig. 5, Q being the finishing point while other parts of the profile act as roughening edges. Other forms of cutter tooth profile are described. The Specification as open to inspection under Sect. 91 (3) (a) describes also a form of tool, Fig. 7 (Cancelled), in which a conical tool body M is slotted to receive a number of tangentially arranged cutters R having finishing points R<1>, R", &c. equally spaced from the tool axes Z<1>, Z". The cutters may be sharpened on the faces g and adjusted along their slots after sharpening. In another modification, Fig. 8 (Cancelled), the tools are arranged so that their shanks mutually support each other and are inclined as shown to the plane of rotation of the tool. In a further modification, Fig. 13 (Cancelled), the cutter shank L is secured in a cylindrical holder T which is adjustable in a carrier V secured by a screw to the tool body M<1>. This subject-matter does not appear in the Specification as accepted.
Patent GB-967111-A (GB)
Title: Improvements in or relating to hydraulic or pneumatic emergency devices
Inventor: JEMELKA JIRI
IPC: F15B15/14
Filed: 1962-07-20
Abstract: 967,111. Fluid pressure apparatus. PRVNI BRNENSKA STROJIRNA, ZAVODY KLEMENTA GOTTWALDA, NARODNI PODNIK. July 20, 1962, No. 28108/62. Heading F1P. An hydraulic or pneumatic power device for the fuel control valve of a gas turbine, especially in the event of an emergency, comprises a cylindrical case housing two pistons 2, 3, the larger of which is the operating piston and is constantly loaded by a spring 4 and the smaller of which is a control piston and slides in a cylinder formed inside the case. The device is operated by pressure fluid supplied to a port 5 and passing through a controllable orifice 6 in the control piston into a tubular connection which bears on a hollow hub 8 of the operating piston, the inside of the hub communicating by means of holes with a space 7 on the side of the operating piston opposite to the side of the control piston and spring to raise both pistons 2, 3. When the pressure of the fluid drops, the spring displaces piston 2 and fluid beneath the piston 2 can escape rapidly through the gap between the hub 8 and control piston to the space above the operating piston.
Patent GB-1170405-A (GB)
Title: Internal Combustion Engine Poppet Valve Stem Seal Assemblies
IPC: F16J15/32
Filed: 1968-06-13
Abstract: 1,170,405. Valve stem seals. GENERAL MOTORS CORP. 13 June, 1968 [21 June, 1967], No. 28133/68. Heading F2B. The stem 28 of an internal combustion engine valve is sealed by a tapered sleeve 40 of filled p.t.f.e. sealingly secured to the end 19 of the valve guide by a sheet metal retainer 42 having resilient fingers 66 which engage the sleeve and urge its smaller end into contact with the stem 28. The sleeve 40 comprises a radial flange 50 portion and a lip portion 56 corresponding portions 60 and 62 of the retainer 42 against the end 52 and side respectively of a counterbore 50 in the valve guide. In a modification, Figs. 5 and 6, the retainer 72 is formed before installation as a cup with a flat base 74 with a central opening 80 from which resilient fingers 85 extend and a cylindrical side wall 76 with indentations 78. The inner surface of base 74 is lined with a disc 86 of filled p.t.f.e. To assemble the seal, the retainer is forced over the guide 90 (before the valve is installed) so that it is held thereon by the indentations 78 and a forming tool (not shown) having a diameter substantially the same as that of the stem 28 is then forced upwardly through the guide to deform the disc 86 and fingers 85 as shown in Fig. 6. In a further modification, Fig. 7 (not shown), the indentations 78 are replaced by inwardly deformed barbs (94). The filled p.t.f.e. may be a mixture containing 70% p.t.f.e., 19% glass and 11% red lead oxide. The retainer 42 is preferably formed of spring steel.
Patent GB-327940-A (GB)
Title: Embroidering machines
IPC: D05C7/00
Filed: 1929-09-17
Abstract: 327,940. Fairweather, W., (Singer Manufacturing Co.). Sept 17, 1929. Universal - feed sewing - machines. - In the universal feed embroidery machine of the Bonnaz type for large size work such as carpets and rugs, described in the concurrent Specification 327,941, means are provided whereby a selected stitch length is uniform throughout a seam regardless of changes in the direction of feed. The feed mechanism, except for the feed-length adjusting devices, is the same as that described in Specification 152,092, anl the feeding and stitch forming devices are manually controlled from the handle 69 in the manner described in Specification 327,941. The feed-foot or ring 78 is detachably secured on the lower end of a feed-bar 79 supported at its upper end for universal movement about transverse pivots 81. The workadvancing movements of the feed foot 78 are derived from a cam 88 on the shaft 9, which cam actuates a lever 89 to engage a lug 90 projecting from a sleeve 91 sliding vertically in the frame 5. The lever 89 lowers the sleeve 91 against the spring 92, and a forked arm 95 engages the collar 96 of the fulcrum block 97 to slide in the cylinder 10. The fulcrum block 97 has arcuate guideways 101 on opposite flat faces engaging ribs 102 on spaced arms 103 of a feedfinger actuating cam 104. The cam is secured in positions above the centre of curvature of the ribs 102 by a screw 99 passing through a hole 98 in the block 97 and slots 105 in the feed cam, Fig. 4. The cam 104 is provided with a cam groove 107 engaged by the end of the feed lever 108 fulcrummed between ears 109 secured to the cylinder 10, to guide a feed collar 110 embraced by a ring 112 on the feed-bar 79. Work supports. The work support 121 is dished to facilitate a firm grip of the feed ring teeth 120 on the material. Looper mechanism. The spiral gear 17 rotating the looper shaft 16 is set for producing chain- or drop-stitches by axi'al movement by the nut 22.
Patent GB-155695-A (GB)
Title: Improvements for driving lawn-mowers by means of an engine
IPC: A01D34/47
Filed: 1919-11-17
Abstract: 155,695. Cox, F. J. Nov. 17, 1919. Lawn - mowers. - A lawnmower has its rotary cuttershaft c driven through a belt b from a pulley on the elongated shaft a of an internal-combustion motor. At the other end of the shaft c a sprocket wheel o is fitted and is adapted to be coupled through a multiple-disk clutch controlled by a handlever x to the shaft c. A chain d passes over the wheel o and over a sprocket wheel on the shaft of the main rollers of the machine. The rollers shaft drives the rollers through ratchet gearing, thus permitting differential movement. In the Provisional Specification it is stated that the drive from the engineshaft to the cutter-shaft may be imparted by belt, chain, or shaft.
Patent GB-794644-A (GB)
Title: A process for the production of condensation products of styrene oxide
IPC: C08F8/00
Filed: 1954-10-04
Abstract: Resinous condensation products suitable for use as intermediates in the preparation of dyes by reaction with diazonium compounds, e.g. diazotized p-nitroaniline, in the preparation of plastics by reaction with polycarboxylic acids or anhydrides to form alkyd resins; and as textile auxiliaries and pharmaceuticals are obtained by reacting styrene oxide with a macromolecular non-cellulose hydroxy compound having at least fifty structural units which are glucose residues or vinyl alcohol residues, e.g. starch, polyvinyl alcohol.  In examples: (1) 100 parts starch are heated with 500 parts styrene oxide at 150 DEG  C. in presence of NaOH; a granular mass is obtained.  (2) 100 parts polyvinyl alcohol are heated at 80 DEG  C. with 500 parts styrene oxide; (3) as in (2) with addition of sodium hydroxide solution as catalyst; a transparent gel is obtained.  Styrene chlorhydrin with molecular equivalent of alkali can be used instead of styrene oxide.
Patent GB-603693-A (GB)
Title: Improvements relating to the prevention of the freezing of moisture carried in suspension by compressed air or gas
IPC: F04B39/06
Filed: 1945-10-29
Abstract: 603,693. Preventing freezing of moisture in compressed air mains. HYMATIC ENGINEERING CO., Ltd., (formerly, HEYWOOD COMPRESSOR CO., Ltd.), MOREILLON, A. E., and HUNT, J. A. Oct. 29, 1945, No. 28541. [Class 55(ii)] In apparatus for preventing freezing in compressed air or gas systems, the compressed air inlet c into a container a for freezing point depressant such as methyl alcohol is arranged so that the air admitted above the surface heats or agitates the depressant. In place of a tube f with outlet g, a downwardly directed bore through the air inlet plug b may cause the air to impinge on the surface of the depressant. A spring - loaded non- return valve e . is disposed in the container outlet. The container may be disposed in a bye-pass between the compressor and an after-cooler, a manually or thermostatically operating bye-pass valve providing for any proportion of air passing through the container. In an arrangement as for aircraft or other vehicles in which the compressor is kept running being driven by the power plant, a regulator is caused to return air to the compressor inlet on a predetermined pressure being reached in an air reservoir, so as to off-load the compressor. Specifications 531,635 and 547,962, [both in Group XXIX], are referred to.
Patent GB-695302-A (GB)
Title: Improvements in and relating to ignition devices
IPC: H01T13/30
Filed: 1950-11-22
Abstract: 695,302. Sparking plugs. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 22, 1950 [Nov. 30. 19491, No. 28559/50. Class. 7 (iv) [Also in Group XI] An electric-ignition device for combustion apparatus to which a pressure fluid is supplied during normal operation and discontinued when the apparatus is shut down e.g. a gas turbine, comprises a cylindrical body portion 6 having one open end and a central aperture 7a in its other end, means e.g. apertured flanges 7 for removably securing the body portion to a wall of a combustion chamber, a cylindrical piston member 9 axially slidable within the body portion, the piston including a skirt portion 17 and an end member including a protrusion 10 adapted to extend through the aperture 7a, ignitor and an end member including a protrusion 10 adapted to extend through the aperture 7a, ignitor means 15 including first and second insulated electrode assemblies 15b, 15a connected by telescoping electrodes 23, 24, an end cap 8 for the open end of the body portion 6 and having a central opening adapted to house the first electrode assembly 15b, the protrusion 10 on the piston end having a longitudinal opening 19, adapted to house the second electrode assembly 15a, this assembly having an outwardly extending electrode 40 defining an ignitor point 11, resilient means 22 for normally biasing the piston member 9 to an axially extended position so that the protrusion 10 and the ignitor point are located in the combustion chamber, the body 6 being adapted to be secured to the combustion apparatus with the protrusion 10 subjected to pressure within the combustion chamber for automatically forcing the piston 9 into the body portion 6, whereby the protrusion 10 and ignitor point 11 are withdrawn from the combustion chamber during normal operation of the apparatus after a self sustaining combustion has been initiated.' A second ignitor point 11 is carried directly by the protrusion 10. Three flat surfaces 10a are provided on the protrusion 10 and when shoulders 21 at the upper ends of the flats 10a clear the aperture 7a. gas pressure can act on the whole base area of the piston 9. The result is that the protrusion 10 is first withdrawn slowly since gas pressure can only act on its comparatively small cross-sectional area and after the shoulders 21 have cleared the aperture 7a it is rapidly retracted. Atmospheric pressure is maintained above the piston by the provision of apertures 16 in the cap 8.
Patent GB-519227-A (GB)
Title: Improvements relating to moulds for making chocolates and other confectionery
IPC: A23G3/02
Filed: 1938-10-03
Abstract: 519,227. Moulds for confectionery. HOULSTON, F. H. Oct. 3, 1938, No. 28619. [Class 87 (ii)] [Also in Group XXII] Moulds 6 for chocolates &c., are made from sheet metal blanks formed into troughs having inverted U-shaped rims 6b and flat marginal portions 6a and soldered together in rows in a frame 5, as shown in Fig. 1. The rims are then machined away to make the mouths of the troughs flush with the margins, and to produce knife-like edges at the junctions of the troughs with the margins, as shown in Fig. 3. Strengthening rings 9 secured by the solder 7 that unites the moulds to the frame, may be provided.
Patent GB-174405-A (GB)
Title: Improvements in or relating to direction indicators for motor cars and the like vehicles
IPC: B60Q1/34
Filed: 1920-12-22
Abstract: 174,405. Stork, H. N. Dec. 22,1920. Road-traffic signals on vehicles.-In direction indicators for road vehicles of the kind in which spring-controlled semaphores located on either side of the vehicle are actuated by a single operating-lever, the transmission mechanism, comprises a half-bevel wheel 1, Fig. 3, adapted to gear, in accordance with the direction of rotation of the handle c, with one of the bevel wheels 2, 3 which operates the selected semaphore b through the shaft g and the bevel gear f, e, Fig. 6. Each semaphore is provided with an electric light m which is automatically illuminated when the semaphore is dropped. Arrangements may be made whereby the semaphore shows a white light to the front when in the upright position and coloured lights forward and to the rear when dropped.
Patent GB-1480013-A (GB)
Title: Method and an apparatus for producing a draining channel in eg a tunnel
IPC: E21F16/02
Filed: 1975-07-08
Abstract: 1480013 Spray gun for comminuted ice G SENN 8 July 1975 [30 July 1974] 28767/75 Heading B2L [Also in Divisions El and E2] Apparatus for spraying comminuted ice particles on to a surface, to assist the formation of drainage channels in concrete tunnel lining (see Divisions E1-2), comprises a receptacle 15 for storing ice cubes, particles, etc, fed from an ice-making machine 12 through an air lock 13, a comminuting area, preferably, as shown, a milling cutter 19, to which the ice cubes, etc, are fed by a screw conveyor 17, and an air pipe into which the comminuted particles are fed at 20 and carried by compressed air to a nozzle 9.
Patent GB-1515376-A (GB)
Title: Data storage systems
IPC: G06F12/08
Filed: 1975-07-09
Abstract: 1515376 Multi-level storage systems INTERNATIONAL COMPUTERS LTD 7 July 1976 [9 July 1975] 28800/75 Heading G4A In a system comprising a main store and a smaller but faster access slave store 23 which is accessible by storage commands, look ahead logic 26 is arranged to load data items from the main store into the slave store in anticipation of their requirement by first ascertaining the direction of a possible sequence of data items containing the currently accessed item and then causing look-ahead action to take place in that direction. In the embodiment described, the slave store 23 holds 256 words in 4-word cells, each word including validity bit and access protection flags. Certain bits of a virtual address supplied to an address register 21 are hash coded, 24, to select a pair of 4-word cells in slave store 23. If the 4-word block virtual address stored in either of the selected cells corresponds to that in register 21 and the addressed word of that block is valid, access to the word is granted, but if the addressed word is not valid access is made to main store to obtain the pair of words containing the required word. If neither of the selected cells has a virtual address corresponding to that in register 21, the less recently used cell of the pair is selected, reassigned to the required virtual address and is updated from main store. The look ahead logic 26 controls an adder 27 to increment the current virtual address by 0, Œ2 or Œ4 in response to a sub-set of the possible storage commands and in dependence on whether, in the addressed 4-word block, the pair of words containing the addressed word are both valid (AWPV) or the other pair of words are both valid (OWPV). The direction of incrementing may be determined by the actual storage command (data or instructions may be stored in ascending sequence of addresses) or, if the active-command may be associated with either direction of sequence, the direction of incrementing may be determined by whether the words of the other pair in the addressed block are present/valid or absent/valid. Look ahead transfers which cross page boundaries are not allowed. The store access unit shown may be controlled by shifting a single 1 bit through shift registers (51-53) corresponding to the initial access and look ahead operations performed by that unit to produce an appropriate series of control signals.
Patent GB-428770-A (GB)
Title: Improvements in the manufacture and production of a vat dyestuff
IPC: C09B5/62
Filed: 1933-10-18
Abstract: Trichlorperylene tetracarboxylic acid diphenyldiimide is prepared by treating the di-imide with chlorine or chlorinating agents in an organic diluent which is not attacked by chlorine under the reaction conditions and in presence of a chlorine transferrer until the trichloro body is formed.  Suitable diluents are nitrobenzene and trichlorbenzene and chlorine transferrer are iodine or sulphur.  Two examples are given.  The product dyes fast clear scarlet-red shades. Specification 26690/13, [Class 2 (iii)], is referred to.
Patent GB-1043418-A (GB)
Title: Process for the curing of epoxy resins
IPC: C08G59/50
Filed: 1963-07-22
Abstract: Epoxy resins are cured with a N1,N3-dialkyldiethylenetriamine. In the preferred curing agents the two alkyl groups are the same and have 3 to 12 carbon atoms.  The curing agents of the invention may be used in admixture with other curing agents, those specified being amines, alkanolamines and polycarboxylic anhydrides. Solvents, fillers or diluents may be incorporated in either the resin or the curing agent before curing.  Many curing agents, epoxy resins which are the reaction products of epoxy compounds with dihydric phenols or polyhydric alcohols, and optional additives are specified.  In comparative examples, N,N1-disec-butylethylenediamine and N1,N3-dicyclohexyldiethylenetriamine are used as curing agents.  The epoxy resin-curing agent systems may be used in the preparation of mouldings, laminates and coatings.ALSO:Surfaces of, e.g., steel panels are coated with compositions comprising epoxy resins and as curing agents N1, N3-dialkyldiethylenetriamines.  The compositions (see Division C3) may also comprise conventional curing agents, solvents, fillers and diluents.  The coatings may be heated to cure them.