baber/WOPTO huggingface dataset:
Patent GB-848019-A (GB)
Title: Improvements relating to electro-mechanical transducers
IPC: H03H9/56
Filed: 1957-09-17
Abstract: 848,019. Piezo-electric ceramic elements. CLEVITE CORPORATION. Sept. 17, 1957 [Sept. 17, l956], No..29213/57. Class 40(8). A piezo-electric resonator element comprises a disc of ferro-electric ceramic material, e.g. barium titanate, which is polarized to impart thereto piezo-electric properties and is adapted for mechanical resonance in its radial mode at a preselected frequency. Transmitting and receiving electrode means are conductively attached to the disc; said means including a circular spot electrode at the centre of one face of the disc, an annular electrode on the disc concentric with said spot electrode, and at least one additional electrode on the other face of said disc. A resonator 10, for the selective passing and voltage transformation of a predetermined band of frequencies in an electric wave filter circuit is shown in a test circuit in Fig. 3. The spot electrode 14 and annular electrode 18 on one face of the disc conform in area and location to the respective electrodes 16 and 20 on the other face. The resonator 10 is initially axially polarised in the regions lying between corresponding electrodes by connecting leads on opposite sides of the disc to opposite D.C. terminals. The A.C. input voltage is applied between electrodes 18, 20 from signal generator 32 and the output signal taken off between centre electrodes 14 and 16. Variation of the frequency of input signal through a range including the design pass frequency gives response characteristics from VO/V1 versus frequency plot, Fig. 12, where V1 is input voltage across resistor 33 and V0 output voltage across 35. The lower face of the disc may be entirely covered by the electrode, Fig. 4 (not shown) but the area of the spot electrode 14 and the location and area of the annular electrode 18 are such in relation to the distribution and phase of vibrational stresses in the disc that the cancellation of opposing fields between the output electrodes is minimized and the ratio of the areas of input and output electrodes is selected to obtain the desired capacitance and impedance ratio between input and output terminals whereby a voltage transformation of frequencies in said band is obtained. The electrode radius is about 2/5 of the disc radius and the annular electrode 18 is of inner radius just greater than electrode 14 and covers almost all the remaining upper face of the disc. In Fig. 6 the annular electrode 36 extends over the peripheral edge 34 of the disc 12b and the disc is polarized axially between the spot electrodes and radially throughout the remainder of the disc. The polarization may be effected radially throughout the disc. Specifications 780,673, 818,710, 843,919 and 843,920 are referred to.
Patent GB-1311187-A (GB)
Title: Continuous process for the hydrolysis of high solids solution of  polyvinyl esters
IPC: C08F8/12
Filed: 1970-06-16
Abstract: 1311187 Hydrolysis of polyvinyl esters BORDEN Inc 16 June 1970 [29 July 1969] 29236/70 Heading C3P A method for making polyvinyl alcohol comprises preparing a solution of a polyvinyl ester of solids concentration at least 25%, intimately admixing therewith an hydrolysis catalyst and conveying the mixture/solution to a confined internally coated hydrolysis vessel which is a tube slanted downwards at an angle of 35-55 degrees to the horizontal, applying said mixture/ solution uniformly over the surface of solution/ catalyst mixtures already in the vessel, and causing the solution as it hydrolyses, to move through the vessel in a uniform plug flow, without agitation. The inner walls are preferably coated with a fluorinated ethylene/propylene copolymer. The type of apparatus is exemplified in the Figure, in which 13 is the vessel, 15 the coating, and 14 the reaction mixture moving from top to bottom. Wheels 17 pull the mixture through in uniform plug flow. The hydrolysis of polyvinyl acetate and a partially hydrolysed polyvinyl acetate is exemplified, using NaOH as the catalyst. The solvent used may be an alkanol, or an aqueous solvent. Methanol is used in the examples. The polyvinyl ester may have been produced by polymerizing one or more vinyl esters to substantially complete conversion in the presence of 0�05 to 1% by weight (based on the monomers) of a chain transfer agent and 0�05-2% by weight of a normal straight chain C 10-20  alpha olefin as conditioning agent.
Patent GB-772408-A (GB)
Title: Improvements in or relating to band tensioning devices
IPC: A47C7/22
Filed: 1955-10-13
Abstract: 772,408. Tensioning bands. HANSEN, H. S., [trading as ROTEX-GJORD V/H. S. HANSEN]. Oct. 13, 1955 [Oct. 14, 1954], No. 29239/55. Class 45. In a device for tensioning a band, such as chair webbing, comprising rods 9, 10 hinged at 3, a band clamping device 16 at the free end of the rod 10, and means 13 to engage a member to which the band is attached, or means to engage the band, at the free end of the rod 9, locking means 4 are provided to retain the rods in a co-axial position when the band is fully tensioned. One end of webbing 26 is fixed to the side member of a chair and the limbs 15 of the means 13 are engaged with the side member on either side of the webbing. With the rods set at an angle the webbing is passed through a slot 20 in the clamp and is gripped by rotating a cam 18 by means of a lever 23. The rods are then brought into the co-axial position by pressure on a lever 5 on the locking means 4 which is a sleeve slidable on the rod 10. On reaching the co-axial position the sleeve is moved to engage both rods to hold the tensioned webbing whilst it is fixed to the other side member of the chair. To enable webbing of different lengths to be tensioned, the tubes which form the rods may be exchanged for rods of other lengths, spring catches being provided to facilitate the exchange. In a modification the means 13 is replaced by a clamp.
Patent GB-653214-A (GB)
Title: Improvements in or relating to picks for knitting machines
IPC: D04B9/20
Filed: 1948-11-11
Abstract: 653,214. Knitting-machines. HEMPHILL CO. Nov. 11, 1948, No. 29364. Convention date, Jan. 30. [Class 74 (ii)] The needle butt engaging ledge of a picker for a circular machine, the arm 1 of which is adapted to swing about a pivot point 2, is formed with its base 9 and abutting edge 10 including an acute angle so that correct selection of the needle butts during the initial stages of picking is ensured, the angle of the edge 10 to the base 9 enabling the butts to move along the base 9 during the picking movement, as the picker swings upwardly, and thereby preventing the end butt disengaging from the base 9.
Patent GB-1134583-A (GB)
Title: Apparatus for catching and knotting the end portions of broken threads on winding frames
IPC: B65H67/08
Filed: 1967-06-26
Abstract: 1,134,583. End catcher and knotter. L. SAVIO. 26 June, 1967, No. 29389/67. Heading D1J. A catcher and knotter for broken thread ends of thread normally passing from an unwinding bobbin 1 to a winding bobbin 2 comprises two suction tubes 8 and 9 each of which have loop-shaped portions extending around a knotting device 4, 5 and each of which have slots 208, 209 extending along the loop portions facing the knotter 4, 5. On breakage of the thread the end F1 from unwinding bobbin 1 is sucked first in and around tube 9 and then is drawn taut out of the slot. Likewise the end F2 from the winding bobbin is first drawn through the tube 8 then drawn taught out of the slot to the position shown by the continued suction. Knotter 4,5 is then operated to join the ends. Preferably a hook 7, arranged at or near the intersection of the planes containing tube loops 8, 9, is disposed so as to catch one of the thread portions emerging from the slots and locate the threads parallel or close to each other. During winding the thread runs to tube 9 through orifice 109 and out through slot 209. Compressed air can be fed through tubes 108, 109 so as to vary the pressure in suction tubes 8, 9, e.g. to a pressure above or below atmospheric pressure. Automatic winding stopping means 6 may act when the thread breaks. Winding bobbin 2 can be reversed for several turns by slit drum 3 to feed the thread F1 into suction tube 8.
Patent GB-365054-A (GB)
Title: Improvements in mudguard stays, stands, handles, and similar parts of cycles, and the like
IPC: B62J15/02
Filed: 1930-10-02
Abstract: 365,054. Cycle mudguard stays, stands, &c. CLARKE, M. L., (Representative of Clark, J.), 181, Bristol Road, Birmingham. Oct. 2, 1930, No. 29442. [Classes 136 (i) and 136 (iii).] Mudguard stays, stands, lifting-handles, or similar fittings or parts of cycles &c. comprise a main sheetmetal unit which, for the whole or the greater part of its length, is of U, channel, or like open section, and which is locally made up to a tubular or closed section by the addition thereto of another member, such as another channel member or a metal, rubber, &c. tube. As shown, a lifting-handle a for a motor cycle is connected by flattened and pierced webs a<1> to mudguard stays a<2> terminating in flattened eyes a<3> for attachment to the wheel spindle or to a frame member, the webs a<1> being riveted &c. to the opposite sides of the mudguard. This combined channel-section fitting is made from sheet metal by pressing and stamping, and the handle part a is made up to a tubular section by the addition of another sheet metal pressing b, which is spot-welded in position. Alternatively, the additional member may consist of a tubular sleeve or sheathing of metal, rubber, &c.
Patent GB-197615-A (GB)
Title: Improvements relating to bakery ovens
IPC: A21B1/14
Filed: 1922-10-28
Abstract: 197,615. Baker, Sons, & Perkins, Ltd., J., and Beanes, W. H. Oct. 28, 1922. Bakers' ovens. - In a bakers' oven of the steam-tube type, the sole or baking- surface a slopes upwardly from the mouth c at the opposite end to which is situated a furnace or furnaces e. The steam-tubes d slope downwardly to the furnace and are bent or cranked, adjacent to the furnace, to accentuate the fall. Screens j may be placed between the tubes d and the rear end of the sole a to compensate for the variation in the distances between the tubes and the sole. A hinged or sliding door i is provided and the mouth c slopes downwardly in order that a steam-laden atmosphere may be maintained in the oven. The tubes mav be arranged in lcops with the looped ends projecting into the furnace.
Patent GB-382748-A (GB)
Title: Improvements in or relating to grates or the like for domestic purposes
IPC: F24B1/193
Filed: 1931-10-24
Abstract: 382,748. Domestic firegrates. KEMPTON, C. H., Stangate House, Westminster Bridge Road, London, and BISSELL, W., 8A, Castle Street, Warwick. Oct. 24, 1931, No. 29554. [Class 126 ] A grate for consuming coke and like fuel, and provided with a gas burner for igniting it, comprises rocking bars 5 extending from back to front of the grate and at right-angles to the burner tube 2. In the construction shown the burner tube forms a front member of the grate and is provided with sockets for receiving the front pivots 6 of the bars. At the rear the bars are pivoted in the rear frame member 4, with the exception of the two outermost bars which are shorter and are pivoted in brackets 9A secured to the splayed side frame members. The bars are rocked by a slidable notched bar 11 having slotted end members 11A mounted on screws 13.
Patent GB-381355-A (GB)
Title: Improvements in or relating to insulating wires and other electrical articles
IPC: H01B3/18
Filed: 1931-10-26
Abstract: 381,355. Condensers. BRITISH CELANESE, Ltd., 22, Hanover Square, London. Oct. 26, 1931, No. 29698. Convention date, Oct. 25, 1930. [Class 38 (ii).] Condensers are insulated by wrapping them with strips, bands or ribbons consisting of, or containing as a base, an organic derivative of cellulose such as cellulose acetate, formate, propionate, butyrate, nitro-acetate or the ethyl, methyl or benzyl celluloses, the wrappings being coalesced, at least partially, by pressure. The bands may contain plasticizers such as among others, triacetin, diethyl phthalate, or triphenyl phosphate. Heat may be applied to assist coalescence, and softening and swelling agents such as acetone may be used for the same purpose.
Patent GB-666481-A (GB)
Title: Colour television transmitter
IPC: H04N11/12
Filed: 1947-11-07
Abstract: 666,481. Television. RADIO CORPORATION OF AMERICA. Nov. 7, 1947 [Dec. 5, 1946], No. 29716/47. Class 40 (iii). In a simultaneous colour television transmission system the signals representing one colour component are modulated directly on to a high-frequency carrier and the signals representing two further colour' components are modulated on to different sub-carriers with their respective upper and lower side-bands suppressed by means of vestigial side-band filters the two sub-carriers then being modulated on to the high-frequency carrier so that the sub-carrier which has its upper side-band suppressed is positioned between the highfrequency carrier and the second sub-carrier. In the arrangement shown in Fig. 1, green, red and blue component signals representative of an image 8 are generated in camera units 11, 21 and 30 respectively which receive light from the image by means of an optical system comprising half-silvered or dichroic mirrors 10, 20 and green, red and blue colour filters 12, 22 and 31 respectively. The signals from camera 11 are mixed in unit 14 with synchronizing signals from generator 13 and fed to a mixer unit 15 to which is also fed sub-carrier oscillations from generators 24 and 33 modulated respectively by the outputs from cameras 21 and 30 in modulator units 23 and 32 the output from the former modulator being passed through a vestigial side-band filter 25 which suppresses part of the lower side-band and the output from the latter modulator through a vestigial side-band filter which suppresses part of the upper side-band and also suppresses some of the lower (desired) side-band. The output from mixer 15 is then modulated on to a main carrier in modulator 40 and fed to a transmission device (e.g. radio transmitter or coaxial cable) via a power amplifier 42 and sideband filter 43. Fig. 3 shows the bandwiths and spacings of the green, blue and red (A, B, C) signals in the frequency spectrum, the main carrier being indicated by a<SP>1</SP>, and the subcarriers by b<SP>1</SP> and c<SP>1</SP>. The spacing between the green and blue signals may be employed for a sound &c. carrier x. The picture detail transmitted by the green component signals is such that reception and reproduction of these signals may be effected by a receiver ordinarily employed for black and white picture reproduction. Details of the sub-carrier generators and side-band filters are described with reference to Fig. 2 (not shown). Specification 666,480 is referred to.
Patent GB-346308-A (GB)
Title: Improvements in or relating to apparatus for handling bar material in rolling mills
IPC: B21B39/04
Filed: 1929-10-01
Abstract: 346,308. Rolling. AKTIEBOLAGET SVENSKA KULLAGER-FABRIKEN, 17, Artillerigatan, Gothenburg, Sweden. Oct. 1, 1929, No. 29744. Convention date, Dec. 1, 1928. Void [Published under Sect. 91 of the Acts]. [Class 83 (iv).] Bar material issuing from rolls 3, 4, Fig. 1, passes through grippers 5, 6, and a guide 16 on a carriage 7 which can move axially with the bar, or move transversely or rotate the bar through any desired angle, or move it up to enter the pass of rolls 2, 3. Fig. 1 is a side view, Fig. 2 a plan, and Fig. 3 a cross section. When the bar passes some distance through the guide 16 the motor 8 is started up by the operator so that the wire 9 pulls the carriage on its rails 12 to the right, the cam 19 allowing lever bars 20, 21 to move up by spring pressure to close the jaws 5, 6 on the bar (one jaw 6 having an extra lever to get motion towards the other jaw). A support 54 fixed on rails 12 receives the other end of the bar. To rotate the bar on its axis and so raise it to enter the next pass the whole carriage 7 with its rails and motor 8 &c. is rocked in trunnion bearings 26, 27 by electric motor 28 through worm gearing. The whole carriage can also be moved bodily transversely on its cross rails 34 constituting rack and pinion driven by motor 35. The carriage can also be tilted or lowered to hold the bar up to enter the pass by counter-weighted levers 49 fixed to the bearing 26, the fulcrum 45 of the lever being rocked by electric motor 43 through worm gearing. The carriage has four sets of rollers 42 with zig-zag guide rails 12, so that the carriage is always supported by at least two rails. All the motor controls are concentrated at one station.
Patent GB-927539-A (GB)
Title: An improved nuclear reactor
IPC: G21C7/26
Filed: 1960-08-29
Abstract: 927,539. Controlling reactors. RNB CORPORATION. Aug. 29, 1960 [Aug. 31, 1959], No. 29746/60. Class 39 (4). In a reactor moderated by graphite and H 2 O and comprising graphite traversed by passages for H 2 O coolant, the amount of fertile and fissionable fuel is such that the reactor is undermoderated with respect to graphite alone and the reactor is controlled by the rate of supply of coolant-moderator. The reactor is designed so that the addition of excess water cannot cause prompt criticality. Fig. 1 shows a hightemperature reactor in which heat is transferred from fuel at 12 to coolant passages 14 by radiation; operation at temperatures around 3000‹ C. ensures rapid removal by resonance fissioning of any Pu formed. Uncontrolled fissioning of accumulated plutonium is thus prevented. Header 22 provides a constant flow of H 2 O much greater than can be evaporated and sufficient to make the reactor critical. Header 26 provides an adjustable flow for control; increases in reactivity are immediately offset by loss of moderation through increased evaporation. Saturated steam is produced which is dried and superheated in other passages 37. Passages 14 contain helical baffles.
Patent GB-1128987-A (GB)
Title: Improvements in or relating to indirectly heated cathode structures
IPC: H01J1/28
Filed: 1966-07-04
Abstract: 1,128,987. Cathode materials. SIEMENS A.G. 4 July, 1966 [5 July, 1965], No. 29853/66. Heading H1D. In an indirectly heated dispenser cathode, in which an emissive charge 5 of alkaline earth metal oxide migrates through a porous carrier 3, a lower oxide of a metal, e.g. Ce 4 O 7 , WO 2 , UO 2 , or V 2 O 3 , is added to the emissive charge to reduce to oxide any hydroxide of the alkaline earth metal that has developed prior to use, the lower oxide being defined, when at least two different forms of oxide other than peroxide are known, as that oxide which has less oxygen than would be expected from the highest valence of the metal. The lower oxide may be added in finely divided form and comprise up to 10% by weight of the charge. The porous carrier may be of sintered tungsten and the charges in which the alkaline earth metal is preferably barium, may be of compact form. A pad 6 of tungsten wire prevents any direct contact between the emissive substance carrier and the charge substance proper and also aids uniform distribution of the emission promoting substance.
Patent GB-536427-A (GB)
Title: Electrical device for determining the distance of thunderstorms
IPC: G01W1/16
Filed: 1939-11-11
Abstract: 536,427. Wireless receiving apparatus. FORREST, J. S. Nov. 11, 1939, No. 29886. [Class 97 (iii)] [Also in Group XXXVI] Apparatus for determining the distance awav of a thunderstorm comprises a wireless receiver 10 tuned to a wavelength greater than the usual broadcasting wavelengths and having a recording milliameter 12 in its output circuit the readings of which are an indication of the distance of the thunderstorm by comparison with readings taken during previously observed storms of known distance. The sensitivity of the receiver is maintained constant by testing it against the measured output of a modulated oscillator 13, which is applied to the receiver by a switch 15 the test being carried out either manually or automatically. A number of such receiving stations may be correlated to plot the path of a thunderstorm.
Patent GB-1483177-A (GB)
Title: Devices for lowering masses down a rope or cable
IPC: A62B1/14
Filed: 1974-09-19
Abstract: 1483177 Fire escape apparatus; climbing aid W J LOWE J M TRANFIELD and W J SENIOR 19 Sept 1974 [23 June 1973] 29945/73 Headings A5A and A6M [Also in Divisions B8 and F2] A device for lowering masses, down a rope or cable, e.g. in a personal fire escape or mountain rescue, comprises a housing formed from two planar plates 5, 6 fixed together in spaced relationship, a cable inlet 7 between two pins 8, 9, a rotatable drum 10 between the plates and a cable outlet comprising a fixed jaw 13 which contacts the cable 12 at surface 20 and a pivoted (about 17) jaw 14 which contacts the cable at surface 21, the mass to be lowered being attached to an extension 18 of jaw 14 at holes 19. The greater the mass, the greater the force applied to the cable 12 by the jaws, thus keeping the rate of descent for different masses constant. Different rates of descent may be obtained by attaching the mass at different holes 19.
Patent GB-1180680-A (GB)
Title: An apparatus for threshing tobacco leaves and separating the threshed tobacco
Inventor: JOHANSSON ARNE
IPC: A24B5/10
Filed: 1968-06-24
Abstract: 1,180,680. Cutting tobacco. ARENCO A.B. 24 June, 1968 [30 June, 1967], No. 29948/68. Heading A4C. [Also in Division A1] A tobacco threshing and separating machine comprises a threshing chamber 3 containing at least one threshing wheel 2 mounted on a driven vertical shaft 1, the chamber 3 leading through a grid of rods 6 to an annular separating space 23, a casing 13 and a cap 7 forming an essentially tapering inner wall, with an outer wall 15 surrounding the threshing mechanism; the wall of the cap 7 having openings 26 through which air is blown. Tobacco is fed into the chamber 3 through a pipe 22, threshed tobacco being thrown out between the rods 6. Air blown out through openings 24, 25 in the casing 13, by a fan (37), Fig. 3 (not shown), through a pipe 27, carries the tobacco leaves upwards in a generally helical path, while stalks etc. fall to the bottom of the machine. The air current from the holes 26 ensures that the upward draught is sufficient to prevent leaves from falling before being discharged through an opening 17 into a discharge conduit 36. A hollow double cone 19 suspended beneath the roof 16 of the chamber 3 directs the air flow through the upper region of the machine. The apparatus may be modified in various ways to adjust the air flow, e.g. the cap may be rotatable to facilitate the helical movement of the leaves. Multiple threshing chambers may be employed.
Patent GB-704967-A (GB)
Title: Improved baking yeast
Inventor: MILLER ERNEST JOHN
IPC: C12N1/18
Filed: 1950-12-08
Abstract: Baking yeast is produced by inoculating a wort, e.g. molasses wort, with Saccharomyces cerevisiae strain D.C.L. 349, allowing the yeast to grow and recover it from the liquor.  The characteristics which distinguish strain D.C.L. 349 from other strains of S. cerevisiae are described.  The yeast may be pressed.