baber/WOPTO huggingface dataset:
Patent GB-678468-A (GB)
Title: Improvements in or relating to the production of 2:3-dihydrofurans
Filed: 1950-03-30
Abstract: A process for the production of a 2 : 3-dihydrofuran of the general formula: <FORM:0678468/IV (b)/1> wherein R, R1 and R2 are the same or different and each is a hydrogen atom or an alkyl group, which comprises heating a 2 : 5 dihydrofuran of the general formula: <FORM:0678468/IV (b)/2> in the presence of an alkali metal aliphatic alcoholate or alternatively an alkali metal hydroxide and an aliphatic alcohol. Suitable alcoholates are the ethoxides, isopropylates and tertiarybutylates of sodium and potassium.  The reaction is preferably effected in an alcohol solution.  The 2 : 3-dihydrofuran produced in the reaction may be hydrolysed to obtain the corresponding g -hydroxyl carbonyl derivative which may be converted to another derivative, e.g. the oxime.  2 : 5-Dihydrofuran may be obtained by the dehydration of 2-butene-1 : 4-diol.  A mixture of 2 : 3-dihydro- and 2 : 5-dihydrofurans obtained by the elimination of 1 mol. of halo-acid from 4-halogenotetrahydrofurans may be converted substantially completely to 2 : 3-dihydrofuran by the process.  2 : 5-Dihydrofuran is converted to 2 : 3-dihydrofuran by heating in closed vessels with in examples (I) potassium hydroxide and tertiary butyl alcohol, (II) sodium dissolved in ethyl alcohol, (III) sodium dissolved in tertiarybutyl alcohol, (IV) potassium dissolved in tertiarybutyl alcohol.  In example II the product is isolated as the oxime.  In examples (V) and (VI) the proportion of 2 : 3 isomers in mixtures of methyl and diethyl-dihydrofurans obtained by the action of caustic potash on 2-methyl - 4 - bromotetrahydrofuran and 2 : 2-diethyl - 4 - bromotetrahydrofuran respectively is increased by heating the mixtures in closed vessels with potassium in tertiary butyl alcohol.  Oximes are formed from the hydrolysis products of the 2 : 3-isomers by treatment with hydroxylamine hydrochloride.
Patent GB-491736-A (GB)
Title: Improvements in and relating to the generation of oscillations of saw-tooth wave form
IPC: H03K6/02
Filed: 1937-03-18
Abstract: 491,736. Valve generating circuits. ALWAY, E. J. March 18, 1937, No. 8052. [Class 40 (v)] The characteristic of an amplifying valve is selected so that rectilinear saw tooth waves are produced when the grid potential is varied in accordance with the exponential discharge of a condenser. The condenser 2 is charged through valve 3 or through a separate rectifier when a synchronizing pulse is received and is discharged slowly through resistance 4. The voltage on the grid of valve 3 varies exponentially but the valve is so chosen that its curvature characteristic compensates for the exponential grid variation and the current in the anode circuit has an approximately rectilinear relation to time. The output of valve 3 is taken off through condenser 8 to terminal 10. To provide a balanced output a second valve 12 may be connected as shown, the balanced output being taken off at 10, 18. Adjustment of the tapping on resistance 20 enables any bias to be superimposed on the saw tooth oscillation.
Patent GB-999074-A (GB)
Title: Improvements in or relating to mineral separation plant
IPC: B03B11/00
Filed: 1963-02-28
Abstract: 999,074. Sink and float separators. MITCHELL ENGINEERING GROUP Ltd., and J. V. GATES. Feb. 24, 1964 [Feb. 28, 1963], No. 8139/63. Heading B2H. A separator comprises a trough containing heavy density liquid in which minerals are parted into a float and a sink fraction, the liquid being introduced at 11 at one end of the trough where the mineral is admitted on a shoot 12, and a deflector 14 or 29 catching the upper flow of liquid and entrained float fraction and guiding it to a weir 19, 20, 21 in the side of the trough. The sink fraction is caught by a conveyer 13 working along the length of the trough. The bottom of the weir comprises plates 19 and 20 hinged at 21 with an adjusting bolt 22 to vary the height of the hinge. A paddle wheel 23 drags the larger pieces of mineral over the weir. The deflector may be curved as shown in full lines at 14 and is adjustable for depth of immersion at mountings 15. As shown in dotted lines at 29 the deflector may be straight. Where the trough is of great width the upper flow of liquid may be divided into two streams deflected into weirs on each side of the trough, Fig. 4 (not shown).
Patent GB-707999-A (GB)
Title: Improvements in or relating to friction clutches
Inventor: RICHARDS ARTHUR BRUCE FRASER G
IPC: F16D25/12
Filed: 1951-04-09
Abstract: 707,999. Lubricating. BRITISH INSULATED CALLENDER'S CABLES, Ltd. April 8, 1952 [April 9, 1951], No. 8205/51. Class 12(3) [Also in Group XXIV] A rotary friction clutch comprises driving and driven members disposed between a pair of concentric chambers, the outer 'of which is of toroidal form and is in communication with the external edges of the driving faces and the inner of which may also be of toroidal form and is in communication with the inner edges of the driving faces, means being provided for scooping liquid lubricant from the outer to the inner chamber where, under operating conditions, it is carried by centrifugal force to and past the driving faces into the outer chamber. The outer toroidal chamber may be stationary and have an annular opening into which project the clutch members, or, as shown, it (22) may be constructed as part of one of the clutch members, in this case the driven clutch member 9. The driving clutch member 4 is axially slidable upon but keyed for rotation with a driving shaft 1 on which the driven member 9 is freely rotatable, the clutch being suitable for use with a continuous vulcanizing machine for the production of rubber sheathed flexible electric cable, for which puroose it is continuously slipped, the clutch engaging force being controlled by an external stationary diaphragm fluid chamber, as described in Specification 707,998, [Group XXIV]. Lubricant 31 is provided in the outer toroidal chamber 22 and is retained therein by a spring sheet metal or neoprene annulus 23, the driving clutch member being provided with scoops 25 in the form of bent tubes which, on relative rotation between the two clutch parts, transmit this oil through passages 26, 27 to an inner chamber 30. The driving member 4 is provided with a friction facing 7 which may have channels 32 to facilitate the passage of the oil from the inner to the outer chamber under the action of centrifugal force.
Patent GB-152048-A (GB)
Title: Improvements in wheels for vehicles
IPC: B60B9/00
Filed: 1919-04-02
Abstract: 152,048. Thompson, W. P., (Engensperger, F.). April 2, 1919. Spring wheels with continuous outer resilient suspension ring.-Relates to wheels of the type in which the felloe is eccentrically suspended on a resilient rim so as to travel the one on the other. The resilient rim a is of I-shaped cross-section, nicks b and recesses c being provided to impart resiliency, and carries upon it the felloe through the medium of angle-irons d. A resilient lining f of leather, spongy iron, vulcanite, wood, &c. may be interposed. The tread g consists of resilient blocks of wood superposed on a layer i of felt, spongy iron, leather, vulcanite, &c. and secured in position by a tightening ring h. The rim is stated to assume an elliptical form when thewheel is under load.
Patent GB-208673-A (GB)
Title: Improvements in covers for corn shocks, and the like, and in the manufacture of the said covers
IPC: E04H5/08
Filed: 1923-03-23
Abstract: 208673 PM KARLSSON 23 March 1923 Index E1A 758 Crops, preserving. - A cover for a corn shock or the like comprises a shaped cloth 2 on which a number of strips 1 of birch-bark or thin wood are laid, a wire lattice 3 being placed over the strips and a second cloth 4 being superposed on the lattice. The several layers are fastened together by wire, formed into the shape of an open umbrella and the upper cloth coated or impregnated with an agent which will make it impermeable to water. At the top of the cover is an opening through which a stick 6 on which the shocks are hung passes. A ring 7 facilitates lifting the cover from the stick. A suitable impregnating agent consists of a mixture by weight of five parts of lime, two parts of chalk, two parts of gypsum, two parts of coal-dust, two parts of tar, and seven parts of water.
Patent GB-1102066-A (GB)
Title: Improvements in or relating to the production of sliding surfaces
Inventor: BAUER FRANZ WEISS AND HERMANN
IPC: C25D11/00
Filed: 1965-02-26
Abstract: A sliding surface is produced by chemically or eletrolytically metal plating a metal surface in an aqueous plating bath, connecting the surface as anode while still maintained in the bath to form micropores in the said surface and a fine powder film on the surface, dewatering the surface and filling the micropores with a lubricant. The plated surface may be treated for 1 minute or less at a voltage of about 4 and a current density of 3 amps/dm2. the surface so treated can then be immersed in an oil containing dewatering fluid for 1 minute and the solvent then is evaporated to leave an oil-soaked surface.  Alternatively plastics material, molybdenum disulphide or a metal such as lead, tin or cadmium may be used as the pore filling lubricant.
Patent GB-307891-A (GB)
Title: Improvements in or relating to the controlling of the piles in sheet feeding and delivery apparatus
IPC: B65H1/18
Filed: 1929-03-15
Abstract: 307,891. Spiess, G. March 15, 1928, [Convention date]. Sheet-separators; pile supports; delivery apparatus.-For controlling the heights of piles in sheet-feeding or delivery apparatus, the feeler members for controlling a ratchet mechanism which operates the pile raising or lowering spindles are mounted on or operated by the suction members, grippers, or the like which lift the sheets from or deposit them on the piles. As applied to a sheet-feeding apparatus in which the sheets are fed from a pile 1 by a suction nozzle 2, Fig. 2, carried by a rod 4 resiliently mounted in a sheath capable of swinging around a pin 6, the rod 4 also carries a pressing or feeler member 3 provided with a finger 7 resting over a rod 8 carried by lever arms 9, Fig. 1, provided on a shaft 10. The feeler member 3 may be resiliently mounted on the rod 4, or the suction nozzle 2 itself mav act as the feeler member. As the members 2, 3 rest on the pile the finger 7 depresses the rod 8 and levers 9 to an extent which depends on the height of the pile. The levers 9 may control independent ratchet mechanism at each side of the pile for raising the pile, or the two sides of the pile may be controlled by a common ratchet mechanism. To each lever 9 a lever 13 is adjustably connected by screws 12, and a knife blade 17 on lever 13 normally engages a groove in a lever 19 mounted on a pivot 18 on which is mounted a pivoted curved member in the form of a guard 20 for acting on a roller 24 to keep a pawl 23 on an oscillating arm 26 out of contact with a ratchet 22 which controls the pile raising spindle. When the pile needs raising, the lever 13 is moved so as to free lever 19 from the blade 17, and the guard 20 permits pawl 23 to engage ratchet 22, and lever 26 is operated bv a crank 28 and rod 27 to rotate the ratchet. The guard 20 is re-set by lever mechanism 32, 31 operated by a cam 30. The lever 13 is controlled by a spring 15, and its movements are limited by adjustable screws 14 which engage fixed projections.
Patent GB-325408-A (GB)
Title: Improvements in hinge fittings
IPC: A47G1/16
Filed: 1929-03-15
Abstract: 325,408. Timings, S. March 15, 1929. Pivoting adjustments.- A pivoted mounting for mirrors and other articles comprises an attachment plate 2 with a housing 1 for friction - producing means, said means comprising a coiled spring 21 disposed between a flange 5 of the housing and a washer 6 non-rotatably secured by a pin 8-to the other attachment member 12 which, as shown, is engaged by a bracket plate 15 secured to the post of the mirror. The pin 8 is of U-shape and engages holes in the plates 12, 6. A washer 22 may be provided between the spring 21 and washer 6. The bracket member 12 has side arms in which slidably engage flanges which project from the plate 15, until the bentover part 20 rests on the top of the plate 12, as shown.
Patent GB-644513-A (GB)
Title: Improvements in a fluid seal for a rotary shaft
IPC: F16J15/34
Filed: 1948-03-23
Abstract: 644,513. Stuffing-box substitutes. CREAMERY PACKAGE MFG. CO. March 23. 1948, No. 8537. Convention date, April 24, 1947. [Class 122(v)] In a fluid seal for a rotary shaft 3 extending through a wall 1, a rotary sealing unit A is slidably mounted on the shaft in sealing contact with the shaft 3 and a stationary shaft-surrounding seat or sleeve 6 secured to the wall, and the shaft also has mounted thereon, between the sealing unit and a collar 12 fixed on the shaft in spaced relation to the sealing unit, a laterally removable retaining unit B which is resiliently expansible axially of the shaft into abutment with the sealing unit and the collar. The sealing unit A comprises a sealing ring 8 in rotating sealing contact with a face 7 of the sleeve 6, and a backing ring 10 which presses a packing ring 9 into the sealing ring 8 and against the the shaft 3. Annular beads 11, 14 on the backing ring 10 and collar 12 respectively position between them the unit B which retains the sealing unit A in position under axial pressure. The unit B comprises two U-shaped complementary plates 15, 16 astride the shaft and urged apart by springs 20 into abutment with the backing ring 10 and the collar 12 respectively and secured against lateral movement by plates 15, 16 formed with partial annular recesses 18, 17 of more than a semi-circle in length and engaging with the annular beads 11, 14. This engagement may be released and the retaining unit B removed laterally from the shaft by tightening thimble screws 23 loosely mounted in one plate 16 and screw-threaded into the other plate 15.
Patent GB-214234-A (GB)
Title: Improvements in and connected with steam power plant
IPC: F01K7/26
Filed: 1924-04-04
Abstract: 214,234. Erste Br³nner Maschinen- Fabriks-Ges. April 14, 1923, [Convention date]. Superheating-chambers heated by combustion gases. - The exhaust or tapped steam from a turbine or other engine T is heated in a surface heat-exchanger W heated by waste flue or exhaust gases, and the heated steam is led away for use in other consumers either directly or through a regenerative accumulator S. The temperature of the steam in the heat-exchanger is regulated by injecting water through a pipe H.
Patent GB-181825-A (GB)
Title: Improvements in and connected with tanks for the storage of oil or the like, and method of installing the same
IPC: E04H7/06
Filed: 1921-03-19
Abstract: 181,825. Duckham, F. W. March 19, 1921. Tanks.-A tank for the storage of oil &c. is sunk or embedded in the soft soil where such tanks are often erected, with or without the use of a rigid or loose raft, to such a depth that the tank will practically float, the sides of the excavation being formed so as to slope towards the bottom of the tank a, Fig. 1, and some or all of the soil c heaped up around the tank so as to enclose and support part of the sides above the ground level. To prevent the tank when empty from rising in the soft ground, anchoring means are provided such as a flange d, Fig. 3, around the base of the tank which may be provided with slots e through which pass bolts f attached to anchoring- plates h.
Patent GB-1034628-A (GB)
Title: Silicone wax
IPC: C08G77/04
Filed: 1965-03-01
Abstract: A silicone wax consisting essentially of a siloxane block-copolymer comprising (A) 5 to 94 mol per cent of blocks of the average general formula <FORM:1034628/C3/1> where the sum of x + y + z has an average value of from 6 to 150, and y and z each have a value of up to 5% of the sum of x + y + z, and (B) 6 to 95 mol per cent of blocks of the average general formula <FORM:1034628/C3/2> where R is an alkyl radical of 16 to 26 C atoms, m has a value of up to 0.25, n has a value of from 0.75 to 1.05 and the sum m + n has a value of from 0.95 to 1.05, can be made by coupling RSiCl3 with HO[Me2SiO]xH in the presence of an acid acceptor and an inert solvent, mixing the reaction product with additional chlorosilanes (to produce the desired proportions in the copolymer) and hydrolysing the mixture. In a typical Example (1), HO[Me2SiO]44H and toluene were added, with stirring, to a toluene solution of C18H35SiCl3 and pyridine, and then was hydrolysed with aqueous isopropanol to yield, after separation in known manner, the desired copolymer.  Uses.-In cosmetic preparations; and as car, floor, furniture, leather and industrial waxes and shoe polishes.
Patent GB-1107956-A (GB)
Title: Improvements in or relating to organic peroxydicarbonates
Inventor: GERRITSEN HANS GIOVANNI
IPC: C07C409/34
Filed: 1966-02-28
Abstract: Unsaturated monomers are polymerized in presence of a compound of formula <FORM:1107956/C3/1> wherein R is C1- 9 alkyl, cycloalkyl or cycloalkyl-alkyl. In Example 7, vinyl cloride is polymerized with the above compound (R = tert-butyl or tert-amyl), in aq. medium and in presence of a polyvinyl alcohol.  Other specified monomers are vinylidene chloride, vinyl bromide, acrylamide, N-substituted methacrylamides, acrylonitrile, vinyl acetate, methyl methacrylate, allyl acetate, diethylene glycol-bis (allyl carbonate) and ethylene.ALSO:Compounds used as driers for linseed, tung and soybean oils have the formula <FORM:1107956/C4-C5/1> wherein R is C1- 9 alkyl, cycloalkyl or cycloalkyl-alkyl.ALSO:The invention comprises compounds of formula <FORM:1107956/C2/1> wherein R is C1- 9 alkyl, cycloalkyl or cycloalkyl-alkyl, and a process for making them by reacting the corresponding 4-R-cyclohexyl haloformate with an aq. alkaline H2O2 solution.  In exemplified compounds, R is Me2CH, Me3C, tert.-amyl, cyclohexyl or cyclohexyl-isopropyl.ALSO:Substituted dicyclohexyl peroxy-dicarbonates used as oxidizing agents in bleaching flour have the formula:-  <FORM:1107956/A1-A3/1> where R is C1-9 alkyl, cycloalkyl or cycloalkyl-alkyl.
Patent GB-435054-A (GB)
Title: Improvements in or relating to gas meters
IPC: G01F3/22
Filed: 1934-03-20
Abstract: 435,054. Gas meters. BINGHAM, J. H., 17, Private Road, Sherwood, and METROPOLITAN GAS METERS, Ltd., Hyson Green, both in Nottingham. March 20, 1934, No. 8722. [Class 54] In a gas meter of the type in which a rigid centre plate 2 on the diaphragm is articulated to a flag arm 9 on a rod 10 which passes through the valve plate 11 and is operatively connected to the valves, the guiding means for the centre plate 2 consist of a U- shaped link 16 pivoted in lugs 17 on the centre plate and connected to cranks 15 on a horizontal spindle 12 rotating in lugs 13 on the meter casing, the relative lengths of the link arms and cranks being such that the included angle is always less than 180‹. Alternatively, the link 16 may be pivoted to the stationary part of the meter and the cranks 15 to the diaphragm plate.
Patent GB-1064851-A (GB)
Title: Photocopying apparatus
IPC: G03G15/26
Filed: 1964-03-02
Abstract: 1,064,851. Electrophotography; photo-copying apparatus. DENNISON MANUFACTURING CO. Ltd. March 2, 1964 [March 8, 1963] No. 8756/64. Headings G2A and G2H. Photo-copying apparatus has a system of belts and rolls by which a strip 27 of copy material, which may have a photo-conductive coating of zinc oxide, is fed along a predetermined path in which the strip is successively cut at 44, sensitized by a corona discharge at 45, exposed, developed at 60 in a liquid toner, heat-fixed and passed to receptacle 100. The original is placed on window 10 and illuminated from below by the light box 16 as described in Specification 1,064, 852 the image being directed on to exposure area 24. Strip 27 leaves reel 26 and passes over idlers 28, 32 to rolls 34 driven by motor 36 through chains 37, 38 and a sprocket 42 which is intermittently connected through an electromagnetic clutch. Further rolls 47 take the strip from corona discharge device 45 and also has a sprocket 48 driven intermittently by an electromagnetic clutch. Elastic belt 50 on rolls 52 and tensioning roll 54, carry the strip into the exposure area 24 over a perforated backing plate 56 on which the strip is held by air suction. Pairs of rubber rolls 62, 64, 66 driven by motor 36, partly dip into toner liquid in a pan 67 supported on spring-loaded arm 70 and fed by pump 68 from tank 72. The developer strip then passes between heat lamps 92 for fixing after which belts 96, 97 take the finished print to receptacle 100. The timing sequence for the above operations is controlled by microswitches M1-M5 which are actuated by cams on cam-shaft 102 driven by motor 36 through an electrically operated onerevolution clutch, a further cam actuating the knife 44. The shaft 102 also drives a pre-set print counter 140 through 16:1 gearing 138. The feed systems of the apparatus have electromagnetic clutches K2, K3 controlled as above by the microswitches. Timers determine the exposure and development times.
Patent GB-571944-A (GB)
Title: Stereoscopic projection
IPC: G03B35/20
Filed: 1943-06-01
Abstract: 571,944. Stereoscopic kinematography. BRITISH THOMSON-HOUSTON CO., Ltd., and CASTELLAIN, A. P. June 1, 1943, No. 8764. [Class 97 (i)] A stereoscopic kinematograph system, in which right- and left-eye images are projected in the form of interlaced strips on to the rear of a screen and are viewed through a vertical line grating at the front, employs a film bearing either the interlaced images, Fig. 3, or pairs of separate right- and left-eye images, Fig. 2, the vertical dimensions of the images extending transversely to the film. The film is moved at uniform speed before a transversely scanning light spot which, in conjunction with a photoelectric cell and amplifier, is used to control a cathode-ray tube to reconstitute the images as interlaced images on the screen of the tube, which reconstituted images are projected on to the projection screen. In the case of the image arrangement shown in Fig. 2, each scan of the light spot covers one line of each of the left- and right-eye images, and since these lines are interlaced on the screen of the projection cathode-ray tube the number of scans given to each image will be half the total number of lines in the interlaced image. The projection tube screen may be one which modulates a projected light beam forming the image on the projection screen. The scanning light spot may be produced by a cathode-ray tube, the scan of the beam of which is synchronized with that of the projection cathode-ray tube ; and the latter may be controlled by circuits associated with the motor which gives the film its uniform motion. Coloured images may be projected by the use of a colour disc interposed in the image beam and rotated by a motor interlocked with the motor driving the film. The film may be produced as described in Specification 571,945. Specification 321,935, [Class 98 (i)], also is referred to.
Patent GB-399722-A (GB)
Title: Improvements relating to the capping of bottles
IPC: B67B1/10
Filed: 1933-03-24
Abstract: 399,722. Capsules for bottles. ENOCK, A. G., Dutch House, Raglan Gardens, Wembley Park, Middlesex. March 24, 1933.No.8876. [Class 125 (iii).] Capsules of material sold under the Registered Trade Mark " Cellophane " &c. are secured on bottles by the application of moisture and heat. Specifications 287,655, [Class 125 (ii), Bottles &c., Filling &c.], 367,021 and 402,115 are referred to.