baber/WOPTO huggingface dataset:
Patent GB-949667-A (GB)
Title: Improvements in the isolation of elastomeric polymers
IPC: C08F8/20
Filed: 1962-07-31
Abstract: Chlorosulphonated or chlorinated polyolefines are isolated from a fluid solution thereof in carbon tetrachloride by applying a film of the solution to a moving smooth inert metal surface maintained at 100 to 200 DEG C., maintaining the film on said surface until the carbon tetrachloride content of the film has been reduced to not more than 3% by weight, and then separating the dried film from the heated metal surface in the form of a self-supporting reticulate sheet, wherein the carbon tetrachloride solution of the polymer contains at least 4% of water dispersed therein and preferably from 4 to 15% by weight.  The chlorosulphonated or chlorinated polyolefines are preferably derived from polyethylene i.e. a homopolymer of ethylene or a copolymer thereof with one or more terminally unsaturated olefines containing 3 to 6 carbon atoms such as propylene, 1-butene, 1-pentene and 1-hexene.  The polymers preferably have a number-average molecular weight of at least 8000 and contain 20 to 50% by weight of chlorine and 0 to 4% by weight of sulphur.  The water may be dispersed in the carbon tetrachloride solution with or without the aid of a dispersing agent such as the sodium salts of long chain alkanol sulphates e.g. 7-ethyl-2-methyl-undecanol sulphate.  The moving smooth inert metal surface may be (a) rotating drums which are preferably heated to 150 DEG  to 185 DEG C. by internal heating (preferably the solution to be evaporated is preheated to 40 DEG  to 70 DEG C.), (b) a heated endless flexible strip of metal or (c) two parallel horizontal steam heated rolls rotating in opposite directions and downward from the position at which they approach each other, a trough for the solution being formed between the two rolls with stationary end plates.  The dried polymer film is removed from the drums by knives.  In the examples the polymers used are (1) Chlorosulphonated polyethylene containing 34% chlorine and 0.9% sulphur made from polyethylene of density 0.955, melt index 4 and weight average molecular weight 70,000.  The carbon tetrachloride/water solution contains 9% of the chlorosulphonated polyethylene.  (2) Chlorosulphonated polyethylene made from polyethylene of density 0.926 and melt index 10, and containing 29% or 31% chlorine and 1.4% sulphur. Specification 804,535 is referred to.
Patent GB-158747-A (GB)
Title: Improvements connected with the feeding of maize and other grains to millstones
IPC: B02C11/04
Filed: 1919-11-26
Abstract: 158,747. Harrowitz, J. Nov. 26, 1919. Addition to 5100/10. Disc mills.-Relates to means for adjusting the pcsition of the regulating-sleeve 1 at the lower end of the feed-pipe 2 of the mill described in the parent Specification, in which maize or other grain is fed to the millstones through inclined pipes passing through the upper or running stone. The sleeve 1 is pivoted to the forked end of a lever 5 which is fulcrumed at 6 and controlled bv a spring 7. One end of the spring is secured to the lever 5 and the other end to the casing 8 of the upper stone, and a screw or other means is provided for adjusting the tension of the spring.
Patent GB-1485883-A (GB)
Title: Transistor amplifiers
IPC: H03F3/45
Filed: 1975-07-14
Abstract: 1485883 Transistor amplifier SONY CORP 14 July 1975 [19 July 1974] 29500/75 Heading H3T In a single-ended input amplifier with a differentially connected pair 10 of transistors, that 11 with the input 14 connected to its base draws its bias via a resistor 33 from an emitter follower 22, while the reference transistor 12 is biased directly by a second emitter follower 34, the base of the first emitter follower 22 being biased directly from a fixed voltage while that of the second 34 is fed from the same voltage via resistor 36. The fixed voltage is provided by a voltage divider 29, 31 across the supply. If the current amplification factors # and base-emitter voltages of corresponding transistors 11, 12 and 22, 34 are equal, the quiescent base voltages of differential transistors 11, 12 will be equalized if the ratio of resistances R33/R36 is made equal to twice the ratio of the emitter current of transistor 34 to the constant current of source 13. If additional loads are fed from input 14 (Fig. 4, not shown) adjustment in R33/R36 may be made to maintain equal base voltages on transistors 11, 12.
Patent GB-352337-A (GB)
Title: A high-tension hollow electric cable
IPC: H01B5/10
Filed: 1930-10-02
Abstract: 352,337. Cables. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.-(Vereinigte Aluminium-Werke, Akt.-Ges.; Lautawerk, Lausitz, Germany.) Oct. 2, 1930. No.. 29538. [Class 36.] A hollow electric cable is composed of layers of hollow wires a of circular cross section arranged to form a tubular body. To prevent collapse the wires may be supported. In a modified construction a cable is composed of layers of hollow wires of square cross section arranged to form a tubular solid wall.
Patent GB-1044096-A (GB)
Title: Improvements relating to frequency control circuits for oscillators
IPC: H04L7/033
Filed: 1965-07-13
Abstract: 1,044,096. Automatic frequency control systems. INTERNATIONAL BUSINESS MACHINES CORPORATION. July 13, 1965 [July 24, 1964], No. 29591/65. Heading H3A. An oscillator 15 forming part of a computer communication network is synchronized with an input from a synchronism transmitter receiver 1 by means of a phase comparator 5 which produces output pulses on line 10 or line 11 according to the sense of the error. These pulses pass to a two-way counter 12 which is normally set to the centre of its range and which produces outputs on the respective lines shown when it indicates a maximum count (HIGH), a minimum count (LOW) or the median count (MEDIAN). An output on the high or low count lines passes to the control circuit 14 and causes a motor 20 driving a variable capacitor 24 to rotate in the required direction, thereby correcting the frequency of oscillator 15. The motor is stopped by one of three inputs to OR gate 28. The first input is from the median line, the second from a timer 16 which times a period (e.g. 15 minutes) from the initiating high or low output, and the third input is from a monitor circuit 30 which detects a lapse in the input from receiver 1.
Patent GB-1424735-A (GB)
Title: Hydraulically operated clutch arrangements
IPC: F15B11/02
Filed: 1973-06-22
Abstract: 1424735 Clutch control; reversing gear concontrol ZAHNRADFABRIK FRIEDRICHSHAFEN AG 22 June 1973 [22 June 1972] 29671/73 Headings F2L and F2D In a clutch control system for a reversing gear wherein a single, or, as shown, double clutch 23, 24 is engaged by selectively supplying pressure liquid from a pump 6 through a selector valve 3 to one or the other of a pair of rigidly interconnected pistons 26, 27 slidable in chambers 20, 21, the pressure build-up in the selected chamber 20 (or 21) is controlled by a pressure limiting valve 4 which is loaded by a servo 10 fed from the pressure supply line 31 through a control valve 8 and restriction 38. During initial clutch engaging movement the liquid displaced from the other chamber 21 (or 20) acts through a line 30 to change over the control valve 8 and thus vent the servo 10 whereupon the pressure limiting valve 4 restricts the pressure in the line 31 to a predetermined minimum value. When initial clutch engagement has been effected the prosure in the line 30 falls and the valve 8 is changed back to the position shown in which pressure liquid from the line 31 is supplied to the servo 10 to increase the bias of the pressure limiting valve 4 and thus increase the pressure in the line 31. The rate of pressure build-up is determined by a restriction 38 in the supply line 33 to the servo 10. The line 30 is maintained at a predetermined low pressure through a pressure reducing valve 5.
Patent GB-772505-A (GB)
Title: Improvements in or relating to optical projection measuring apparatus
IPC: G02B21/00
Filed: 1954-10-15
Abstract: 772,505. Optical gauging. OPTICAL MEASURING TOOLS, Ltd., and DIETRICH, C. F. Jan. 16, 1956 [Oct. 15, 1954], No. 29807/54. Class 106(2). In optical gauging apparatus a plurality of feelers are provided to engage different points on the surface of a workpiece, one of the feelers being operatively connected to a graticule and another to an element of the optical system for projecting an enlarged image of the graticule on to a screen, whereby relative movement of the feeler is indicated on the screen by movement of the image. As shown in Fig. 1, for measuring the dimensions of a workpiece 18, one feeler 11 is connected to a graticule 13 and a second feeler 12 to an objective lens 15, an enlarged image of the graticule 13 being projected by the light beam 14 on to a screen 17. In another embodiment the relative displacement of the feelers is caused by changes of surface inclination. In a further embodiment the central feeler of three feelers for measuring curvature is connected to a graticule, one of the outer feelers is fixed and the third is connected to the objective lens. In the arrangement shown in Fig. 5, the central feeler 35 is connected to the graticule 38, one outer feeler 36 to a vertical slide 40 and the other outer feeler 34 to a second slide 39 carrying the objective lens 37, the slide 39 moving vertically on the slide 40, the vertical movements of feelers 34, 36 being added algebraically at the slides.
Patent GB-1344714-A (GB)
Title: Blast furnaces
IPC: C21B5/06
Filed: 1971-06-25
Abstract: 1344714 Blast furnaces NIPPON KOKAN KK 25 June 1971 [6 July 1970] 29839/71 Heading F4B [Also in Division C7] In operating a blast furnace 1, gas extracted peripherally at 18 above the charge surface 17 and at a temperature up to 700‹ C. is recirculated to a point above the softening and melting zone 15 above the tuyeres 8 via a line 10, fan 3, gas regenerator 4 and line 14, further gas extracted from the middle of the charge passing off by a line 9 and being divided, part 9a being used to fire a hot blast store 2, part 9b to fire the regenerator 4 and part 9c for other external uses. A line 11 supplies methane to mix with the recirculated top gas, the gas regenerator converting any H 2 O or CO 2  into H 2  or CO. The recycled gas may be extracted through pipes extending vertically in the furnace near the stack wall and terminating just above the charge surface or through pipes with mouths within the upper part of the charge. Owing to its extraction and return near the stack wall the recycled gas contains less nitrogen than the unrecycled gas.
Patent GB-924242-A (GB)
Title: Horticultural composition
Inventor: LEPINE FRANK WILLIAM
Filed: 1959-09-01
Abstract: A composition for protecting tree-grafts comprises an aqueous dispersion of a mixture of polymers of acrylic esters and, as a wetting agent, a strong quaternary base, e.g. cetyl pyridinium bromide.  As a mixture of acrylic ester polymers there is specified a mixture of poly(methyl) and poly(butyl) acrylates. Also present in the compositions may be thickeners, e.g. kaolin and talc, pigments, e.g. white lead, and bactericides or fungicides, e.g. copper oxychloride.ALSO:A graft or wound on a plant is sealed by applying thereto an aqueous dispersion of a film-forming mixture of polyacrylic esters and, as a wetting agent, a salt of a strong quarternary base, e.g. cetyl pyridinium bromide.  As a mixture of polyacrylic esters there is specified a mixture of polymethyl and polybutyl acrylates.  Also present in the compositions may be thickeners, e.g. kaolin and talc, pigments, e.g. white lead, and bactericides or fungicides, e.g. copper oxychloride.
Patent GB-269479-A (GB)
Title: Improvements in or relating to valves
IPC: F16K5/22
Filed: 1926-11-26
Abstract: 269,479. Merco Nordstrom Valve Co., (Assignees of Nordstrom, S. J.). April 14, 1926, [Convention date]. Closure members; wedging. - A rotary plug valve is provided with a plug 13 the ends of which terminate within the casing and are enclosed at the larger end by a cover with interposed resilient means, preferably in the form of a flat spring 19 and at the smaller end by an operating and lubricantcontaining head 30 screwed with a lefthand thread into the flange. An annular camber 29 between the head 30 and the plug communicates with longitudinal lubricating grooves 35 in the seating. In opening the valve a ball check valve 40 allows the lubricant in the chamber 29 and grooves to be compressed thereby acting to lift the plug in its seating. In the reverse .direction the ball valve allows lubricant to pass from the head to the chamber 29 and grooves 35. The larger end of the plug is formed with projections 25 spanning the flat spring 19 which acts as a stop to determine the open and closed positions of the plug. The ends of the spring are located in recesses in the casing, as shown, and the cover 16 forces the spring against the centre piece 24 of the plug. The head 30 may be modified by fitting a spring-pressed plunger for putting pressure on the lubricant, or the ball valve 40 may be omitted.
Patent GB-427968-A (GB)
Title: Improvements in or relating to methods of and machines for finishing edges of sheet material
IPC: C14B11/00
Filed: 1933-10-31
Abstract: 427,968. Variable-throw cranks; operating clutches. UNITED SHOE MACHINERY CORPORATION, Paterson, New Jersey, U.S.A.-(Assignees of Fossa, J. ; Salem, Massachusetts, U.S.A.) Oct. 31, 1933, No. 30166. Convention date, Oct. 31, 1932. [Classes 80 (ii) and 80 (iii)] [See also Group XV] In an edge-finishing machine wherein the vertical reciprocation of a heated tool is effected by a connecting-rod 95 actuated from a shaft 111, the angular velocity of the shaft 111 is varied to vary the period of dwell of the tool on the workpiece. The shaft 111 has secured thereto a slotted arm 201, and a roller, mounted on a pin secured to a gear-wheel 113, extends into the slot of the arm. The gearwheel 113 meshes with a gearwheel 115 on a driving shaft 117, and is rotatably mounted on a short spindle carried by a lever 209, the hub of which is rotatable on the driving shaft 117. A latch 213 pivoted on the lever 209 has provided at 217 a locking-pin which may be engaged in any one of a series of holes in an upstanding stationary member 223. If the axis of rotation of the gear-wheel 113 @in alignment with the axis of the shaft 111, a uniform angular velocity will be imparted to the shaft 111, but if, by raising or lowering the lever 209 the axes do not coincide, a varying motion will be imparted to the shaft 111, and consequently the heated tool. The shaft 117 rotates twice for every single revolution of the shaft 111, and is driven from a constantly rotating pulley 119 through a known clutch of the one-revolution type, but means are provided whereby two consecutive revolutions are imparted to the shaft 117. The clutch is thrownin by pulling down, against a spring 123, a treadle rod 121, and a pivoted catch 129 is urged by a spring 133 to snap over a collar 125 which is secured to the rod and bears against a bracket 127. The collar and rod are held depressed until the shaft 117 has made rather more than one revolution, whereupon the free end of the catch 129 is engaged by the enlarged end of the connecting-rod 95 and swung about its pivot to release the collar and rod. The rod 121 now projects into the path of the clutch to disengage the latter at the end of the second revolution of the shaft 117.
Patent GB-443254-A (GB)
Title: Improvements in or relating to band strapping machines for binding packages for transport and other purposes
IPC: B65B13/30
Filed: 1934-10-22
Abstract: 443,254. Sealing. GARRETT ENGINEERING WORKS, Ltd., R., Leiston, and BAMBROUGH, A., Suncroft, Aldringham, both in Suffolk. Oct. 22, 1934, No. 30213. [Class 146 (ii)] In a machine for securing bale - ties without the use of a seal, the overlap of the tie is positioned between levers f. Pressure on an operating handle lowers a cam member d to operate the levers f to lift the strap to a recess in a fixed die h. The member d then operates levers g to cut and bend the edges s<1> of the strap as shown in Fig. 4. In a modification, additional levers may be fitted for flattening the joint. The levers f may raise and cut the edges of the tie and the levers g may effect bending. In a further modification, the cuts are made in the form of dovetails.
Patent GB-759988-A (GB)
Title: Distributor ring suitable for cooling extruded products
IPC: B29C48/06
Filed: 1954-10-20
Abstract: 759,988. Cooling extruded thermoplastic articles. CELANESE CORPORATION OF AMERICA, Oct. 20, 1954 [Oct. 20, 1953], No. 30214/54. Class 87(2) A distributer ring suitable for use in blowing cooling air &c. on to an extruded thermoplastic rod or, as shown, tube 12 (the tube having been extruded from a die 11) comprises an annular chamber having baffles and means for regulating the air flow in different regions around the chamber. The chamber comprises two annular plates 22, 23 and two peripheral strips 24. 43. Compressed air is fed from conduit 19 into the chamber and emerges at an inclined opening 51 where it impinges on the extruded product, opening 51 being formed between plates 23, 43. On its way through the chamber the air travels over baffle 26, under baffle 27, over baffle 28 and under baffle 29. Baffles 26, 28 extend forwardly from plate 23, and baffles 27, 29 extend rearwardly from plate 22. Baffle 26 has ports 32 extending along its forward edge. and these ports can be selectively opened or closed by raising or lowering gates 35 by means of slides 37. Baffle 29 comprises interfitting blocks 42 which are slidably mounted against strip 43 and can be individually raised or lowered by spring and stud means 45, 47. The chamber is adjustably secured by stud 14 to a plate 13 fastened to the extruder, heat insulating material 17 being interposed.
Patent GB-391819-A (GB)
Title: Improvements in or relating to the stiffening of boot or shoe parts
IPC: A43B23/08
Filed: 1931-11-03
Abstract: 391,819. Boot &c. stiffeners. BRITISH UNITED SHOE MACHINERY CO., Ltd., Union Works, Belgrave Road, Leicester, and MACDONALD, D. B., Narborough Hall, Narborough, Leicestershire. Nov. 3, 1931, No. 30406. [Class 17 (ii).] Fibrous sheet material acting as a vehicle for a substance applied to it prior to its introduction into the shoe and which will be operative in securing the stiffener in position is interposed between a shoe-end stiffener and the adjacent fibrous material of the upper. The stiffener may comprise a fibrous vehicle impregnated with a stiffening material which hardens in the shoe by drying or by cooling, and a piece of sheet material, coated on its puff-engaging side with a cementitious substance which will unite the upper and stiffener before lasting commences, may be sewn into the upper. For example, in the case of stiffeners made as described in Specification 355,349, there may be sewn into the upper by the stitching which joins the toe-cap and vamp, and preferably in place of the layers of fabric employed to form a pocket to receive the stiffener, two pieces of close-woven fabric with a rubber or other substance or composition on one face and smooth or fleeced on the other, with the coated faces face to face and with the stiffener between them. Pressure and heat may be applied, as described in Specification 244,507, [Class 17 (i), Boots and shoes, Apparatus for making &c.], to unite them. Alternatively, one piece of fabric only may be used, and this need not cover the stiffener, and the heat treatment may not be necessary. Specification 155,418, [Class 17 (ii), Boots and shoes, Construction of], is referred to.
Patent GB-520443-A (GB)
Title: Improvements in or relating to the bottoms of domestic fire grates
IPC: F24B1/193
Filed: 1938-10-21
Abstract: 520,443. Firegrates for stoves IRELAND, J. Oct. 21, 1938, No. 30438. [Class 126] The rear of the bottom A of a domestic firegrate of the basket type is formed where it is liable to be burnt away with a rectanguar recess B and the recess is fitted with a preferably arched renewable member C. The bottom A and member C may be provided with legs A', C<SP>1</SP> and the member C may be provided with downward projections C fitting in slotted lugs a on the bottom A and lateral projections c<SP>1</SP> resting on the upper surface of the bottom A. The middle part c<SP>2</SP> of the member C may be domed. The leg may be fitted with adjustable spring sleeves E. In modifications the member C is fitted with two slotted lateral extensions adapted to be bolted to the bottom A or a lateral extension on one side. and a projection on the other fitting in a slot on the bottom.
Patent GB-1319537-A (GB)
Title: Lead-in construction for ceramic discharge lamps
IPC: H01J5/32
Filed: 1970-06-23
Abstract: 1319537 Ceramic-to-metal seals EGYESULT IZZOLAMPA ES VILLIAMOSSAGI BESZVENYTARSASAG 23 June 1970 [23 June 1969] 30511/70 Heading B3V An electrode 5 for a discharge lamp, (Fig. 3, not shown) is sealed in a ceramic support 1 by a plurality of elements 2, 3, 4, having coefficients of thermal expansion between that of the meta of the electrode and the ceramic of the support. The expansion coefficients increase for each sealing layer from the electrode outwardly, the sealing materials being solutions of different oxides, e.g. of calcuim, barium, zirconium, boron and magnesium, applied by spraying on to the rod or tube electrode 5 of tungsten, molybdemiun, rhenium or their alloys. After applying up to six or more graded layers, the assembly of electrode and closure 1 is placed in a graphite jig which is heated by high frequencies in a vacuum or neutral atmosphere to fuse the seal to the electrode and closure 1. Alternatively, the sealing layers may be pre-pressed rings, or foils wound on to the electrode. The closure is sealed to the end of a ceramic lamp-envelope, or the envelope may be constructed to form the closure 1.
Patent GB-1043247-A (GB)
Title: Improvements relating to tunnel diode oscillators
Inventor: MERRETT John
IPC: H03B7/08
Filed: 1962-08-09
Abstract: 1,043,247. Tunnel diode oscillating circuits; switching circuits. HOOVER Ltd. Aug. 7, 1963 [Aug. 9, 1962], No. 30613/62. Heading H3T. [Also in Division H2] A tunnel diode oscillator comprises a supply transformer 11, connected across A.C. terminals 13, 14, having a secondary voltage of a fraction of a volt, an output transformer 20 and a tunnel diode 10 connected in a series loop with the secondary winding 15 of the supply transformer and the primary winding 21 of the output transformer. Bursts of output pulses from the oscillator during the periods when the instantaneous potential across the tunnel diode is above the necessary minimum value and of the correct polarity are fed over transformer 20 to differentiating circuit 23, 24 and thence to the control electrode of S.C.R. 25, connected in series with load 28 and inductor 26 across supply terminals 13, 14. The pulse rate frequency of the oscillator may be varied by withdrawing a ferrite rod forming the core of the output transformer 20. If a burst of pulses is required during each half cycle two similar tunnel diodes may be connected in series opposition in the series loop or a second secondary winding and a duplicate circuit connected in the reverse sense may be provided. A small resistance 16 may be inserted in the series loop if the resistance of the transformer windings is not high enough.
Patent GB-776126-A (GB)
Title: 2-chlorodioxene and preparation thereof
IPC: C08F24/00
Filed: 1955-10-26
Abstract: The invention comprises 2-chlorodioxene (see Group IV (b)) and polymers and co-polymers thereof; and a process for hydrolysing it to 2-p-dioxanone, which may be copolymerized with acrylonitrile.ALSO:The invention comprises 2-chlorodioxene, and a process for preparing it by heating 2:3-dichlorodioxane to remove hydrogen chloride by refluxing or heating in a solvent; also a process of preparing 2-p-dioxanone by the hydrolysis of 2-chloro-dioxene under alkaline conditions.  In examples: 2:3-dichloro-1:4-dioxane is refluxed alone or heated in tetraethylene glycol dimethyl ether, to give the 2-chlorodioxene and HCl; the product is hydrolysed with NaOH in presence of potassium oleate to give 2-p-dioxanone.