baber/WOPTO huggingface dataset:
Patent GB-1495870-A (GB)
Title: Crankcase breathers for internal combustion engines
IPC: F01M13/04
Filed: 1976-02-04
Abstract: 1495870 Crank-case ventilation in IC engines FORD MOTOR CO Ltd 4 Feb 1976 04346/76 Heading F1B In a crank-case ventilation system, oil-laden blowby gases only flow through an air-filter 31 at high engine loads. An oil-filler cap 1, Fig. 3 has a spigot 2 which is connected to a rocker box 32, Fig. 1, by a pipe 33 along which blowby gases flow leaving a crank-case 28. In the cap 1 connections are provided at 24 to the air-filter 31, at 15 to the crank-case 28 and at 9 to an induction manifold 26. The latter connection 9 has a throttle member 10, connection 15 is controlled by a lightly sprung valve 18 and an umbrella valve 14 lies between connection 9 and the other two connections 15, 24. At low engine loads, blowby gases are sucked by manifold vacuum through connection 9 and throttle 10 (via a filter 7), the valve 18 opening under the suction and allowing fresh air from filter 31 and connection 24 to enter and ventilate the crank-case 28 via connection 15. At higher loads, the production of blowby gases becomes so great that the throttle 10 does not allow them to escape completely; thus building up pressure in the crank-case 28, which closes valve 18 and opens umbrella valve 14 venting the blowby gases to the air-filter 31 via connection 24.
Patent GB-1403871-A (GB)
Title: Manufacture of polyvinyl alcohol
IPC: C08F116/06
Filed: 1974-01-30
Abstract: 1403871 Polyvinyl alcohol WACKERCHEMIE GmbH 30 Jan 1974 [31 Jan 1973] 04355/74 Heading C3P Polyvinyl alcohol is produced by (A) first introducing into a reaction vessel a solution of a polyvinyl ester in a first C 1-4  alcohol, (B) subsequently introducing into the vessel, in either order, a second C 1-4  alcohol having a specific gravity less than that of said solution (this alcohol may be the same as that of the solution) and also a liquid alcoholysis catalyst having a specific gravity greater than said second alcohol, so that there are formed in said vessel a top layer of the second alcohol, an intermediate layer of liquid catalyst and a bottom layer of the polymer solution, (C) subsequently mixing said three layers to form a suspension, (D) allowing the polyvinyl ester to hydrolyse, and (E) isolating the resulting polyvinyl alcohol. The catalyst may be acidic or basic. In examples, the polymer solution is of polyvinyl acetate in methanol, the second alcohol is methanol, and the catalyst is methanolic sodium hydroxide solution.
Patent GB-936625-A (GB)
Title: Arrangement for producing a frequency stabilized alternating voltage
IPC: H02M7/5383
Filed: 1960-02-09
Abstract: 936,625. Transistor oscillator circuits. SVENSKA A B. GASACCUMULATOR. Feb. 9, 1960 [Feb. 16, 1959], No. 4528/60. Class 40 (6). In a push-pull transistor invertor having regenerative feedback proportional to the load current, an inductance is connected across the points of application of feedback, the B/H characteristic of the inductance being so related to the Vb/Ib of the transistors that the frequency is substantially independent of supply voltage or load current. As shown in Fig. 8, regenerative feedback proportional to the current in the load 8 is applied via the frequency controlling transformer 14. The knee of the B/H characteristic lies at a value of magnetizing current corresponding to the base current at the knee of the Vb/Ib characteristic of the transistors and the slope of the B/H characteristic above the knee is equal to that of the Vb/Ib characteristic. The feedback current is five times that required to bottom the transistors. In Fig. 10, an auto-transformer 18 forms the frequency-controlling inductance, diodes 11, 12 respectively completing the base circuits for transistors 2, 1. In Fig. 11 (not shown), two separate transformers form the frequency-controlling inductance. Fig. 9 (not shown), relates to an arrangement wherein the transistors are directly connected to a centretapped load.
Patent GB-305939-A (GB)
Title: Improvements in and relating to overload couplings for electrically operated worm gears
IPC: G05G15/08
Filed: 1929-02-11
Abstract: 305,939. International General Electric Co., Inc., (Assignees of Allgemeine Elektricitõts-Ges.). Feb. 10, 1928, [Convention date]. Void [Published under Sect. 91 of the Acts]. Driving-arrangements; protective or safety devices, auxiliary.-A worm-shaft c driven by an electric motor a is maintained under axial elastic pressure which is normally sufficient to maintain the worm d in engagement with the worm wheel c driving, for example, a conveyer belt f, but in the event of overload, the pressure is overcome by the action of the worm wheel and the shaft is displaced to an extent sufficient to disengage the worm from the worm-wheel, means being also provided whereby the displacement of the shaft cuts off the supply to the motor. The motor drives through a coupling b and the shaft is held against axial displacement by a spring: k, the pressure of which may be adjustable. Movement of the shaft opens a switch g whereby the holding coil h of the motor switch i is deenergized. The displacement of the shaft may cause a switch such as g to close and energize a coil which opens the switch i.
Patent GB-619049-A (GB)
Title: Coupling for assembling structural members in orthogonal directions, chiefly for scaffolding
IPC: E04G7/18
Filed: 1946-02-13
Abstract: 619,049. Clamps. THOMAS, M. Feb. 13, 1946, No. 4558. Convention date, Feb. 26, 1945. [Class 44] [Also in Group X] A U-bolt comprised in a coupling for structural elements particularly scaffolding has the bend of the U non-circular to straddle one element 2 through two contacting points or arcs 13, 14 and has the limbs of the U inclined outwards and bent to straddle the other element 7 and screw-threaded at their free ends for a clamping plate 10 which is curved so as to bear only through two points or arcs 18, 19 against the element 2, for which purpose the plate 10 has a cut 10<11> which allows its slight bending. The limbs may be oblique as at 5 with respect to the element 2 and bent as at 20 to increase the, length surrounding the element 7.
Patent GB-433222-A (GB)
Title: Improvements in non-return valves particularly applicable as silencers for internal combustion engines, fire arms and the like
IPC: F01N1/16
Filed: 1934-02-14
Abstract: 433,222. Exhaust-silencers. CLAUDE, M., 9, Rue Branly, Issy-les-Moulineaux, Seine, France. Feb. 12, 1934, No. 4610. [Class 7 (ii)] [See also Groups XXIX and XXI] A silencer comprises a pipe 1 closed at 2 and having slots 3 closed by spring turns 4<11> slidable on the pipe and pressed together partly by their own elasticity and partly by the ends 4<1> of the spring, which ends are adjustably secured to the pipe 1 by collars 5, 6. A deflector 7 is provided. The spring turns &c. may be of a light alloy or hollow to decrease their inertia, and their section may be V- or U-shaped or like that of a turbine blade to facilitate passage of the exhaust gases. Alternatively, the slots 3 may be closed by washers, or rods resiliently held in contact by flexible collars.
Patent GB-922540-A (GB)
Title: Improvements relating to apparatus for the testing of earth and stone specimens
IPC: G01N3/08
Filed: 1960-02-10
Abstract: 922,540. Testing apparatus. CESKOSLOVENSKA AKADEMIE VED. Feb. 10, 1960 [Feb. 13, 1959], No. 4635/60. Class 106 (2). Apparatus for testing earth and stone specimens comprises an upper chamber 11 in which the specimen 12 is received, and a lower chamber 3 which houses a bar magnet 4 coupled to an internally screwed hub so that as it is rotated it screws a screw 6 into or out of the upper chamber 6. When it is screwed into the upper chamber the screw 6 exerts an axial pressure on the specimen 12 which is simultaneously subjected to pressure fluid which is fed into the upper chamber from the lower chamber through an aperture 10, the fluid supply being controlled by cock 9. Rotation of the bar magnet 4 is achieved by rotating a magnet 1, the poles of which are positioned in line with but outside the lower chamber.
Patent GB-306142-A (GB)
Title: Improvements in or relating to book-keeping appliances
IPC: B41L3/20
Filed: 1929-02-12
Abstract: 306,142. Herschel, C., (trading as Herschel, C. [Firm of]. Feb. 16, 1928, [Convention date]. Book-keeping; manuscript books; block and sheet holders.-A device for enabling entries made in commercial books or files, particularly loose-leaf books, to be duplicated upon a separate sheet comprises a flat plate which is pivotally mounted upon a frame pivoted to the back of the book or file and is adapted to be swung beneath any page thereof, thereby providing a supporting surface and means for holding the duplicate sheet. The frame comprises an upper and lower horizontal bar each in two adjustably connected portions a<1>, a<11>, Figs. 2 and 3, the portions a<1> being connected to lugs e on the cover by a hinge-pin b. The outer ends of the bars a" are connected by a ba.r z<1> and are provided with struts f which support the frame horizontally. The duplicate sheet k is held upon the supporting plate c by overhanging flanges i engaging its longitudinal edges, one edge of the plate c beis hinged to shoes g slidably mounted upon the frame bars a<11>. After swinging the duplicate sheet and plate c beneath a page of the book the vertical columns on the sheet and book can be registered by shifting the plate c laterally by rotating a key r on a pinion shaft which gears with rack teeth on the shoes g. An oblique adjustment of the plate c to compensate for possible faulty hinging of the frame bars a<1> is provided by slotting each bar a<1> where it receives screws v connecting it to the bar a<11>, which can thus be adjusted longitudinally. A carbon sheet u is laid loosely between the original and duplicate sheets. The example shows the appliance used in conjunction with a file of the overlapping visible type wherein the leaves h are provided with filing-apertures y along both edges, so that either edge can be attached to filing prongs x or the like, enabling entries to be written on both sides of the leaves, the supporting-plate c &c. being attached to one cover only.
Patent GB-572032-A (GB)
Title: Improvements in or relating to the formation of curved surfaces in plywood
IPC: B27D1/08
Filed: 1944-03-14
Abstract: 572,032. Shaping wood by pressure. YAGER, S. March 14, 1944, No. 4761. [Class 145 (i)] Curved surfaces, such as a portion of a roof of an omnibus, are formed in plywood by first constructing, a mould of the desired shape of two walls 10, 11 of wood and a stiffening wall 12 which support shaped metal sheets 13, 14 arranged so that edges 15, 16 of the walls are uncovered so that layers of plywood 23, 25, 26, 27, Fig. 3 (not shown), may be secured over the mould by tacks 24. Each set of layers 23, 25 is cut so that the grains lie in the same direction and so as to fit closely to the mould. Portions of the layer 25 may be cut away as indicated at 26 to ensure a close fit of the layer 25. The layers 25 are arranged so that their grains cross the other layers, and a synthetic resin or like adhesive is coated on each side of the layers 25. The covered mould is placed in a bag of rubbered fabric 29, Fig. 3 (not shown), and air is exhausted from the bag. The bag is inserted in an autoclave and subjected to the action of wet steam at a temperature adequate to set the cement used. The article is finished by trimming the edges of the wood after removal from the mould which is coated with an anti-adhesive. Stiffening ribs may be applied during the moulding by providing grooves 17, 18, 19 in the mould at the places at which the ribs are located, the ribs being inserted prior to the application of the final plies, and being coated on their exposed surfaces with a synthetic resin or like adhesive. Specifications 462,600 and 494,885 are referred to.
Patent GB-565150-A (GB)
Title: Improvements in or relating to internal-combustion engines
IPC: F01B9/02
Filed: 1943-03-24
Abstract: 565,150. Two-stroke engines. REYNOLDS, J. A. E. March 24, 1943, No. 4819. [Class 7 (ii)] In a compression-ignition or other engine comprising two coaxial cylinders 10, each with opposed pistons 21, 22, each piston of one cylinder being directly coupled to the corresponding piston of the other and to a crankshaft 12, situated between the cylinders, by means of a Scotch yoke 23 the members 24 of the yoke 23 form slides for a cross-head embracing the centre crank-pin and comprising blocks 27 each engaging the crank-pin over slightly less than half its-circumference, so that each is free to tilt slightly. Each piston comprises a crown 33 integral with a shank 34 on which is secured a skirt 35 retained bv a nut 38, a gasket 39 of mica or other material of low thermal conductivity being interposed between the crown and skirt. The crown and shank may be of heat-resisting ferrous material, with heat-dissipating fins within the crown and on the shank, and the skirt of a light alloy. The yoke 23 is connected to each of the pistons 21 by a connecting-rod 40 entering the hollow shank 34 and engaging a transverse gudgeon 41 therein, the gudgeon being parallel to the crankshaft axis and allowing a slight tilting movement of the piston relative to the yoke. Lubricating grooves and passages 28 are provided. The outer pistons 22 are similar to the pistons 21 and have cooling fins 46 under the crown and on the shank. They preferably have a stroke of two-thirds that of the pistons 21 and are connected by levers 43 and rods 29 supported in guides 30 and carrying yokes 31 to engage cross-heads 32 on the two outer crank-pins. The engine cylinders 10 are provided with piston-controlled exhaust ports 18, and-inlet ports 20 supplied with air by a double-acting pump 52 having an air-inlet filter 53 at each end and driven through gears 59 from the crank-shaft 12. Fuel injectors 50 are supplied from a fuel-pump 49. In a modification, each inner piston 21 has its skirt integral with the crown and with a stem of H-section or double-H section to facilitate cooling: A modification of the yoke 23 is described in which each of the distance-pieces 25 is provided with a, pin engaged by a tilting pad sliding on a guide rail in order to take up side loads.
Patent GB-203986-A (GB)
Title: A device for trimming the edges of wall paper
IPC: B44C7/02
Filed: 1923-02-20
Abstract: 203,986. Benson, A. L. Feb. 20, 1923. Cutting-appliances. - An appliance for trimming the edges of wall-paper comprises two portions which are separately clamped to the pasteboard. The roll of paper is held on a spindle C, with spring-pressed washer K, carried by a clamp A@, attached to the board by a thumb screw B1. The cutter element with rotary cutting dises F1, F2 and an adjustable edge-guide G, is carried on a clamp A2 fixed by a thumb screw B2. Specification 8518/10 is referred to.
Patent GB-162446-A (GB)
Title: New or improved means or apparatus for preventing the drifting or accumulation of sand on or near the sea shore
IPC: E02B3/02
Filed: 1920-02-18
Abstract: 162,446. Kehoe, T. Feb. 18, 1920. Sand screens.-Apparatus for preventing the accumulation of sand on the sea shore, or fur effecting its removal, comprises an endless conveyer belt d, Figs. 1 and 3, working over rollers b, b<1> b<2> in a casing a, which is provided with a feeding-trough n with inclined sides n<1> and a longitudinal bottom opening n<2>, extending over the whole length of the conveyer. The belt may be driven by hand, as shown, or by power, and the end roller b<2> is adjustable by means of screwed rods e for the purpose of tightening the belt. For dealing with dry sand, a trough with a narrower bottom opening and transverse bars o' across the top is used. A wall or screen is arranged at the rear of the conveyer, and the sand blown against the wall falls into the trough and on to the belt and is conveyed to the shoot p, where it is discharged; or the sand may be shovelled' into the trough by hand and carried to any desired point. To ensure a continuous flow of sand from the trough to the belt, the latter may be provided with transverse pieces, on which are mounted prongs projecting through the bottom opening to the trough; or the sides of the trough may be built up of longitudinally-arranged rollers which may be shrouded by an endless belt or covering, on which projections may be provided, adapted to be revolved through suitable gearing.
Patent GB-441661-A (GB)
Title: An electro-magnetically operated slide valve, in a sealed chest, having no external moving parts, for controlling the flow of steam or other gases under pressure
IPC: F16K31/10
Filed: 1935-02-18
Abstract: 441,661. Electromagnetically-operated valves. STANIER, W. A., Newburn, Chorley Road, Hertfordshire, and VICKERS, G., 8, Moon Street, and HICKLENTON, F. W., 33, Cambridge Street, both in Wolverton, Buckinghamshire. Feb. 18, 1935, No. 5220. [Class 135] A shut-off valve for the steam heaters of railway carriages comprises a sealed chest 4 containing a slide valve member 1 actuated by externally excited electromagnets having their poles 16 within the chest, and mechanism such as arms 12 enabling armatures 13 to move the valve 1. The arms 12 are integral with a rocker arm 11 carrying the valve and pivoted at 11<a> to a polepiece 18. The armatures 13 which are flanged so as normally to rest in holes 20 in the polepiece 18 acquire momentum before striking the arms 12. The holes 20 have non-magnetizable liners. The valve 1 slides on a flat face 3 having a port 2 leading to the heater and a small inclined port 9 leading to the atmosphere. In the position shown, the inlet 6 is in communication with the port 2. However, when the port 2 is closed by the valve, a recess in the valve connects it with the inclined port so as to vent the heater. The three cores corresponding to the poles 16, 16, 18 are united at their opposite ends by a yoke plate. The external coils 15 are surrounded by protecting covers and separated from the chest by a shield of insulating material.
Patent GB-801339-A (GB)
Title: A process for the production of artificial filaments and the like by the viscose spinning process
IPC: D01F2/08
Filed: 1957-02-15
Abstract: Artificial filaments and the like are produced by spinning viscose having a NaOH content of not more than 6 per cent in a spinning bath containing sulphuric acid and zinc sulphate in a ratio of 1.2:1 to 0.8:1, in addition to 17-19 per cent of sodium sulphate, the absolute concentration of the sulphuric acid being between 4.5 and 6 per cent. Viscoses having gamma values between 40 and 46 can be spun.  The filaments may be stretched, after travelling a short distance in air, in a hot diluted acid bath by at least 85 per cent.
Patent GB-1275204-A (GB)
Title: A method of producing a signal for switching-over the feed of the grinding wheel in a grinding machine
Inventor: MEISTEL ALEXANDER MIKHAILOVICH
IPC: B24B47/20
Filed: 1970-02-04
Abstract: 1275204 Grinding VILNJUSSKY FILIAL EXPERIMENTALNOGO NAUCHNOISSLEDOVATELSKOGO INSTITUTA METALLOREZHUSCHIKH STANKOV. 4 Feb 1970 5348/70 Heading B3D The load on an electric motor 1 rotating a grinding wheel (not shown) is detected by a senser 2 which may be a current transformer and which supplies a signal to a memory unit 3 up to the instant the wheel engages the workpiece, the occurrence of this condition causing the senser 2 to supply a further signal to a comparison unit 4 whose output is the difference between the further signal and that stored in the unit 3. The difference signal is applied to electrical actuating apparatus 5 producing an electrical signal for switching the drive for the wheel from that for the accelerating condition to that for the operating condition, this switching signal only being produced when the difference signal, i.e. the increase in load on the motor 1, is greater than a preset value dependent on the machining process and its mode of operation. Unit 3 may include a condenser or a magnetic core.
Patent GB-749514-A (GB)
Title: Apparatus for measuring and recording the magnitude of a variable condition
Inventor: MI ANTONIUS MATHIAS JOHANNES F
IPC: G01V3/34
Filed: 1953-02-26
Abstract: 749,514. Electric indicating systems. BRITISH PEROLEUM CO., Ltd., [formerly ANGLO-IRANIAN OIL CO. Ltd.]. Jan. 20, 1954 [Feb. 26, 1953]. No. 5407/53. Class 40(1) [Also in Group XIX] A variable magnitude is periodically recorded by driving an electric motor in the appropriate direction according to the magnitude and sense of changes in the variable, the motor driving a printing counter which records through an inked ribbon on a continuously driven paper tape at each energization of a periodically operated solenoid. As shown, the variable resistance arm 12 of a bridge may comprise a platinum resistance thermometer or the slider of the resistance may be adjusted by a mechanical link 10 in accordance with temperature, pressure or other variable. The bridge output is balanced automatically by the output potential of a potentiometer 21 adjusted by a motor 19 responsive to the difference of the two outputs, after amplification at 17 and phase sense rectification at 18. The motor drives a counter 22 the reading of which is periodically impressed on a tape 26, driven with an ink ribbon 25 by clockwork 27 or a second motor, by a solenoid 28 operated e.g. by contacts closed by the clockwork. The invention may be used for measuring temperature and or pressure in bore-holes in which case the oscillator 14 feeding the bridge supply batteries and the various other elements of Fig. 1 are located in a tubular casing.
Patent GB-438640-A (GB)
Title: Improvements in and connected with web-winding mechanisms and antomatic controls therefor
IPC: B65H18/20
Filed: 1935-02-20
Abstract: 438,640. Winding webs. HAUBOLD AKT.-GES., C. G., 2, Uhlichstrasse, Chemnitz, Saxony, Germany. Feb. 20, 1935, No. 5495. Convention date, May 5, 1934. [Class 100 (i)] In a machine in which material in web form is wound into a roll 9, the roll 9 is supported by the usual rollers 90 and also by fluid-actuated apparatus controlled by a device responsive to the movement of the roll spindle 8 due to the increase in diameter of the roll 9. Hydraulic rams 7 working in cylinders 6 engage the two ends of the spindle 8 and are supplied with pressure fluid by a pump 1 drawing fluid from a container 2 and delivering to a chamber 10. A valve 102 controls a byepass 13 from the chamber 10 to the container 2 and is connected to a pivoted lever 12 having a weight 11 slidable thereon tending to close the valve 102 against the action of the fluid pressure. A spring 18 tends to pull the weight 11 towards the lever fulcrum 14 and a cable 15 attached to a rotary cam 160 pulls in the opposite direction. An endless cable 163 which passes over a pulley 16 on the shaft 161 of the cam 160 has attached thereto a finger 171 fixed to the bearing of one end of the spindle 8. As the spindle 8 rises with increase in size of the roll 9, the cam 160 is turned by the cable 163 and pulley 16 so as to cause the weight 11 to move away from the fulcrum 14 and decrease the byepass opening past the valve 102. Increase of fluid pressure in the cylinders 6 is thus caused and the rams 7 support the extra weight of the roll. The cam 160 is shaped to give the required pressure control.