baber/WOPTO huggingface dataset:
Patent GB-1476500-A (GB)
Title: Method of preparing liquid homopolymers and copolymers  having terminal halogen atoms
IPC: C08F36/04
Filed: 1974-09-06
Abstract: 1476500 Halogen-terminated diene polymers E N BARANTSEVICH, B N PRONIN, I B BELOV A F KALAUS N K BERESNEVA and A P TROITSKY 6 Sept 1974 [18 Sept 1973] 38994/74 Heading C3P Liquid homopolymer or copolymer having terminal halogen atoms (of use in the rubber industry in the production, for example, of sealing, coating and moulding compositions) is prepared by polymerising a conjugated diene, either alone or together with vinyl monomer, in the presence of initiator which is an azonitrile compound of formula wherein n is an integer of from 2 to 6 and X is halogen, for example wherein n is 2 and X is bromine. Preferred conjugated dienes have from 4 to 6 carbon atoms. Suitable vinyl monomers are compounds having polar groups, for example styrene, acrylonitrile and methacrylates, and preferably are used in amount not exceeding 10 parts by weight per 100 parts by weight of diene. The azonitrile compound may be used in amount of from 3 to 9 parts by weight per 100 parts by weight of total monomer to be polymerized. The polymerization may be effected in an organic solvent medium, for example acetone or benzene. The liquid polymer may be cured by a tertiary polyfunctional amine, for example fully methylated triethylenetetramine or pentaethylenehexamine. As exemplified, 4,4-azobis (4-cyano-l-bromo-npentane) is used as initiator in the homopolymerization of butadiene-1,3 in acetone (Examples 1, 3, 6 and 7) or in benzene (Example 4) and of 2-methyl-butadiene-1,3 in acetone (Example 2) and in the copolymerization of butadiene-1,3 and acrylonitrile in acetone (Example 5), the resulting oligomers being cured by tertiary polyfunctional amines in non-extended and carbon black-extended systems.
Patent GB-956622-A (GB)
Title: Sheet material dispensing device
IPC: A47K10/38
Filed: 1961-11-02
Abstract: 956,622. Roll holders. STEINER CO. LAUSANNE S.A. Nov. 2, 1961 [Jan. 26, 1961], No. 39223/61. Heading A4G. In a toilet-roll holder, constructed as in Specification 956,621, the core of a roll 50 is supported on a spindle 38 by means of an eccentrically mounted disc 96. The disc has an integral spigot 95 secured for rotation in bore 94 of plug 90 by pin 101 engaging annular groove 103. The end 100a of leaf spring 100 enters slot 102 to prevent the disc 96 from being rotated. Key 70 lifts end 100a out of slot 102 so that the disc can be turned into concentricity with the end 92 of the plug and the roll 50 removed.
Patent GB-1157035-A (GB)
Title: Printing Plate and method for producing same
IPC: B41N1/14
Filed: 1967-08-25
Abstract: 1,157,035. Printing plates. SPERRY RAND CORP. 25 Aug., 1967 [31 Aug., 1966], No. 39285/67. Heading B6C. A planographic printing plate comprises a base and a coating thereon of a polyvinyl alcohol, the coating being such that at least the exposed surface thereof is not fully insolubilized whereby surface marks made on the coating may be washed off with water. Coating admixtures may have the following composition percentagewise by weight: 45- 60% P.V.A. (10% solution), 15-25% clay, 3-15% titanium dioxide, 0-0À05% surface active agent, 0À1-1À0% HCl, 0À1-0À7% melamineformaldehyde resin. The coating is dried in the temperature range of 90-110 C.
Patent GB-1492099-A (GB)
Title: Dental installation including an electric power distribution unit
IPC: A61C1/00
Filed: 1975-09-25
Abstract: 1492099 Installation wiring arrangements SIEMENS AG 25 Sept 1975 [27 Sept 1974] 39416/75 Heading H2H A dental installation comprises an electric power distribution unit 14 including a power input connector, a number of output connectors for detachably connecting the unit to control devices and components of the installation, and a number of conductors 30-37 which interconnect selected output connectors with each other and/or with the power input connector thereby connecting the control devices and components to each other and/or to the power input connector. The unit 14 is constructed as a printed circuit board provided with the input and output connectors 19 on its periphery. A power supply 13 is connected to the unit by a line 28 and the conductors on the printed circuit board supply power to, or interconnect, appliances such as a motor driven drill 3, an ultrasonic handpiece 5, a block 18 for heating air and water supplies, a pilot lamp 11 for indicating the direction of rotation of the motor, a spray 4, a fluid supply control unit 15, a speed control 8 for the drill motor, and switches 12, 17.
Patent GB-1188724-A (GB)
Title: Electromagnetically Actuated Clutch
IPC: F16D27/00
Filed: 1967-08-29
Abstract: 1,188,724. Friction clutches. BORGWARNER CORP. 29 Aug., 1967 [26 Oct., 1966], No. 39516/67. Heading F2C. In an electromagnetically actuated clutch comprising an input shaft 14 driving an output member 16 through a multiplate assembly 28, the actuating mechanism for compressing the assembly 28 is carried by a hub 22 connected to the shaft 14 and journalled in a housing 12 carrying a stationary solenoid 48. An annular armature 52 surrounds and is interconnected with the hub 22 by balls 62 engaging helical grooves 56, 58, 59 in the hub and grooves 60 in the armature, whereby the armature rotates and moves to the right in the Figure on energization of the solenoid. Connected to a flange 54 on the armature by pins 82 is a nut 64 having rolling engagement through balls 68 with a thread 69 on the hub so that as armature 52 rotates, the nut turns with it and moves along the thread to the left in the Figure and into engagement with a thrust bearing 42 of the clutch plate assembly. The thread 69 acts as a torque amplifier in conjunction with the armature. Release of the clutch on de-energization of the solenoid is effected by springs 88 surrounding the studs 82 and which draw the nut and armature to the neutral position shown. In a modification, Fig. 3 (not shown), the armature is connected to the nut through a surrounding sleeve rigidly secured to the nut and splined to the rim of flange 54. Alternatively, the sleeve may be splined on both the flange 54 and the nut, Fig. 5 (not shown).
Patent GB-348047-A (GB)
Title: Process for the manufacture of double compounds of the acridine series
IPC: C07D219/08
Filed: 1929-12-27
Abstract: Double salts of 3 : 6-diamino-10-alkylacridinium bases with 3 : 6-diaminoacridine are obtained by alkylating to the extent of 50 per cent 3 : 6-diamino-acridine, substituted in the amino group by a substituent capable of being split off, and then eliminating the said substituent.  The desired semi-alkylation is effected in a solvent using an amount of alkylating agent which is dependent upon the temperature conditions.  With a temperature of 140 DEG  C., an equimolecular proportion is employed; above it the proportion must be diminished, whilst below it the proportion must be greater than equimolecular.  Examples are given of the preparation of 3 : 6-diamino-10-methyl-acridinium chloride-3 : 6-diaminoacridine hydro-chloride and the corresponding sulphate, and 3 : 6 - diamino - 10-ethylacridiniumchloride - 3 : 6-diaminoacridine hydrochloride.  3 : 6 - Diacetyl-diaminoacridine forms the starting material in each case, nitrobenzene and dichlorobenzene are employed as solvents, methyl sulphate and p-toluene-sulphonic methyl and ethyl esters comprise the alkylating agent, and after a heat treatment with a quantity of the alkylating agent which is determined by the temperature employed, the acetyl group is saponified with hydrochloric and sulphuric acid respectively.
Patent GB-1159405-A (GB)
Title: Writing Instrument
IPC: B43K23/12
Filed: 1966-09-06
Abstract: 1,159,405. Writing instruments. SCHNEIDER G.m.b.H. GEB. 6 Sept., 1966 [18 Sept., 1965], No. 39707/66. Heading B6P. The writing point 1 of a reservoir writing instrument, which may be used in recording apparatus, is conical with radial incisions providing resilient lips 6 meeting at an axial line k. Pressure on the point during writing causes the surfaces f between the lips to separate sufficiently for ink to flow from the reservoir along the line k to the point. An absorbent pad (8, Fig. 1), may be provided in the point adjacent to the lips 6. The writing point 1 may be made of a resilient plastic such as polyamide or of metal. In the latter case, the incisions may be made by means of a laser beam. The external surface of the lips 6 may be electroplated. The point 1 may form part of or be attached to the reservoir which can be of rubber (Fig. 7), or which may be transparent and closed at its end remote from the point by an air-permeable plug (10, Fig. 1). As shown in Fig. 6, the point 1 is attached to a reservoir 12 enclosed in a casing 17 so as to provide a heat insulating space 22. A resilient member 23 urges the reservoir in the direction of the point. A pasty layer 14 of silicone grease or metal soap floats on and moves with the free surface of the ink in the reservoir. To ensure its slidable sealing engagement with the inner wall of the reservoir, the layer 14 may have embedded in it a rigid or flexible member 24 which may be ball-shaped (Fig. 5). A slide-on cap 19 for the instrument has a resilient pad 20 with a depression 21 to receive the point 1. Two reservoirs 12 with points 1, but of half the length shown in Fig. 6, may be fitted in the casing 17, the point 1 of the second instrument bearing against the member 23 which is suitably-shaped to receive it.
Patent GB-340138-A (GB)
IPC: D02J1/22
Filed: 1929-12-30
Abstract: Artificial silk, horsehair, or ribbons are obtained by precipitation of cellulose hydrate by a wet spinning process and stretching the freshly precipitated material by passing it over one or more rubbing surfaces which are heated, whereby damage to the fibre is minimized. The stretching devices may be glass tubes or rollers which are internally heated by electricity, gas, steam, or liquid.  In the case where a heated roller is used as stretching device, this may be made to rotate at a speed equal to, greater, or less than that of the draught roller.  The spinning bath liquid adhering to the threads becomes more concentrated as the threads pass over the heated stretching device and the completion of coagulation is accelerated. Alternatively, or in order to minimize crystallization on the heated surface, the stretching device may be irrigated with water, bases, acids, salt solutions, or spinning bath liquor maintained at the same temperature as that of the stretching device.  The process results in threads of increased tensile strength and breakages are minimized. In an example freshly precipitated viscose silk is passed over a stationary roller internally heated with steam, and then to a draught roller and a collecting bobbin.  In another example the threads are passed over a water-heated roller rotating at a peripheral speed 10 per cent lower than that of the collecting bobbin.
Patent GB-1234765-A (GB)
Title: Improvements in electrical control systems
Inventor: GURWICZ DAVID
IPC: H02P7/29
Filed: 1967-09-01
Abstract: 1,234,765. Control of D.C. motors. SEVCON ENG. Ltd. 13 Aug., 1968 [1 Sept., 1967], No. 40011/67. Heading H2J. A variable mark-space ratio pulse controller comprises a main thyristor S 5  for connecting D.C. source B to a load, e.g. series motor F, A, a commutating capacitor C and first and second paths in parallel with thyristor S 5 , the first path comprising a thyristor S 1 , the capacitor C and a thyristor S 3  and the second path comprising thyristor S 3 , the capacitor C and thyristor S 4 . In operation, thyristors S 1 , S 2  are fired simultaneously so that capacitor C is charged. Thyristor S 5  is fired next, short-circuiting thyristors S 1 , S 2  and so extinguishing them. Thyristors S 3 , S 4  are now simultaneously fired so that capacitor C discharges and commutates thyristor S 5 . After discharge capacitor C is charged through thyristors S 3 , S 4  in the reverse sense and then thyristor S 5  is fired again, extinguishing thyristors S 3 , S 4 . Refiring of thyristors S 1 , S 2  causes the capacitor C to discharge and commutate thyristor S 5 . This cycle is repeated.
Patent GB-846331-A (GB)
Title: Improvements in a reciprocating pump for liquids
IPC: F04B15/04
Filed: 1957-12-24
Abstract: 846,331. Reciprocating pumps. MONTECATINI SOC. GENERALE PER L'INDUSTRIA MINERARIA E CHIMICA. Dec. 24, 1957 [Dec. 27, 1956], No. 40102/57. Drawings to Specification. Class 102(1). A pump for high temperature liquid comprises an inlet port in the cylinder wall controlled by the plunger which has a portion of reduced cross-section connecting the pump chamber and an outlet enlargement in the cylinder wall above the inlet port. The piston may be actuated by a crank or a cam profiled to divide each cycle into piston raising, a pause and piston descent. Specification 814,754 is referred to.
Patent GB-1467692-A (GB)
Title: Method of measuring the shear strength of particulate material
IPC: G01N3/00
Filed: 1974-09-16
Abstract: 1467692 Testing particulate material I A S Z PESCHL 16 Sept 1974 [14 Sept 1973] 40321/74 Heading G1S A ring 2 fixed to a roughened base 1, Fig. 1, has a similar ring 4 coaxially mounted upon it and the cylindrical space 3, 5 so formed is filled with a particulate material to be tested and closed by a roughened and weighted lid 8 rotatable with a shaft 9. The shaft may be rotated by a cable 26 attached to a force meter 19 mounted on a trolley 20 driven either by a slow speed motor 21 or a high speed motor 24, and a bearing 10 is secured by an arm 13 to a support 14 turnable on a shaft 15, a tension spring 17 connecting the shaft 15 with the top of the lid 8. In operation, the material contained in the spaces 3, 5 is consolidated before the test by tensioning the spring 17 to rotate the weighted lid 8 about the axis of its shaft 9, the process being repeated and the spring being relaxed afterwards. The shearing strength of the particulate material is then measured by pulling on the cable 26 to indicate on the meter 19 and rotate the shaft 9, weight 12 and lid 8, the material being shifted at the interface between the rings 2, 4.
Patent GB-1311925-A (GB)
Title: Tennis rack frame
IPC: A63B49/02
Filed: 1970-08-21
Abstract: 1311925 Tennis racket MAARK CORP 21 Aug 1970 [28 Aug 1969] 40382/70 Heading A6D A metal tennis racket comprises an extruded metal frame strip shaped to partially define a generally oval section and a pair of spaced apart handle end sections, and a flexible plastics throat piece secured to the frame strip to complete the oval section. In Fig. 1, a generally oval stringing section 14 and two spaced apart parallel handle end sections 17, 18 are formed by a metal frame strip 12 of opposed tubular sections connected by a web section, a first channel being formed in the outer periphery and a second channel in the inner periphery of the oval section, and a plurality of holes being formed in the web in the oval section for the racket string. A plastics throat piece 19 having outer surfaces complementary to the second channel is secured to the formed frame strip to complete the oval section. A grommet strip 28 is mounted in the first channel, grommets formed on the grommet strip extending through the holes in the web, and a plastics handle is secured to the spaced apart handle end sections. The handle may be a foamed plastics material moulded around the handle end sections, and a wrapping of leather may be provided for the hand grip area of the handle.
Patent GB-985245-A (GB)
Title: Fluid-pressure regulating valve
IPC: G05D16/06
Filed: 1962-10-25
Abstract: 985,245. Valves. RANDOLPH MFG. CO. Oct. 25, 1962 [Nov. 29, 1961], No. 40393/62. Heading F2V. A regulating valve for limiting to a desired maximum level the vacuum supplied to a vacuum operated load from a source of varying vacuum comprises a vacuum chamber B having a source and load ports 9, 10 and a valve seat S surrounding an atmospheric port, a valve closure V mounted on a diaphragm 24 for movement toward and away from the seat, pneumatic spring means including a chamber 25 responsive to the vacuum in the chamber B tending to draw the closure away from the seat, and a mechanical spring 36 tending to urge the closure on to the seat with a substantially constant force. The spring 36 is in tension, adjusted by a screw 37 and held against rotation by a finger 42 while the diaphragm 24 is of neoprene-impregnated nylon and carries a washer 29 which fits within the valve seat. The valve is fitted with a filter 42 in the form of a porous elastic garter. The Specification gives dimensions, details of performance and resonant frequencies for the valve.
Patent GB-1479740-A (GB)
Title: Supervisory arrangement for sensing and measuring circuit
IPC: G01R31/50
Filed: 1974-09-19
Abstract: 1479740 Detecting broken leads and preventing consequential faults PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 19 Sept 1974 [22 Sept 1973] 40871/74 Heading G1U In a system in which current and voltage leads extend to a load Rl, Fig. 1, from terminals 1, 2, 3, 4, and in which departure of the voltage across the load from a present value causes a unit V to control a generator GEN to raise the voltage across the load, a break in any one of the four leads to the load R1 could cause the unit V to so control the generator that its voltage is erroneously raised excessively, and possibly dangerously, high, voltage sensing means S1 and S2, and a relatively high resistor R2, Figs. 2 or 3 are provided which are arranged to detect a break in any of the four leads and to render the generator GEN unresponsive to further control by the unit V as a consequence. In Fig. 2 each voltage sensor S1, S2 normally sees substantially zero volts. However, if for example, the lead from terminal 1 to the load becomes broken then voltage sensor S1 sees substantially the full generator voltage causing it to render the generator unresponsive to further control. Similarly breaks in any of the other three leads from terminals 2, 3 and 4 cause the generator to be made unresponsive. In Fig. 3 each voltage sensor S1, S2 normally sees the full generator voltage and each only renders the generator unresponsive when the voltage across it is not sufficiently high. Voltage sensor Sl, S2 could be transistors as in Figs. 4 and 5 (not shown).
Patent GB-1283542-A (GB)
Title: Improvements in or relating to the storage and retrieval of information
IPC: G11B7/243
Filed: 1969-08-15
Abstract: 1283542 Data storage ENERGY CONVERSION DEVICES Inc 15 Aug 1969 [22 Aug 1968 15 Jan 1969] 40918/69 Headings H3B and H3T [Also in Division G4] Data is stored on a layer of a semi-conductor material which is reversibly switchable between two stable states by the application of energy, one of the states being such that the material has a generally disordered, amorphous atomic structure with localized bonding and the other state having a more ordered, crystalline structure, the material having detectable characteristics, e.g. electrical resistance, which vary between the two states whereby the stored data may be retrieved. Two types of memory material are described, reference being made to Specifications 1,070,411 and 1,070,412. In the first type the application of energy above a threshold value to a selected area of the material causes an abrupt change in the resistance of the material, which, in the two stable states is respectively 10<SP>6</SP> and 10<SP>2</SP> ohms. In the second type application of energy above a threshold value causes a more gradual change in resistance to a value depending on the value of the incident energy used. The energy used in basically heat which may be generated by a number of methods, e.g. using electron beams, laser beams, photoflash lamps, voltage or current electrodes, or a heated air jet. In an embodiment, Fig. 1, a current electrode 12 is supplied with voltage pulses 16 and is "scanned" across the surface of the material to store data at selected discrete areas. The resistance of the material is changed from 10<SP>6</SP> ohms to 10<SP>2</SP> ohms by a current pulse of duration about 1 millisecond and amplitude 5 milliamps. The reverse change is initiated by a pulse of duration 2 microseconds and amplitude 100 milliamps. In a further embodiment, Fig. 9 (not shown), the latter type of store is used as an electrostatic printer. Numerous embodiments are briefly described each depending on a change in a particular property of the semi-conductor as it is changed between its two stable states. The data may be retrieved utilizing the fact that the dielectric properties, the refractive index, capacitance, charge retention, surface reflectance, light absorption, light transmission, and particle scattering properties of the semi-conductor are different in the two states of the material.
Patent GB-939738-A (GB)
Title: Air distributor device
Inventor: THIRD ALEXANDER DAVIDSON
IPC: F24F13/068
Filed: 1960-11-29
Abstract: 939,738. Ventilators. THERMOTANK Ltd. Dec. 15, 1961 [Nov. 29, 1960], No. 40955/60. Class 137. In an air distributer device for location in a wall or ceiling with the mouth of an air discharge outlet substantially flush therewith, a deflector plate is located centrally in the discharge outlet substantially in the plane of the outlet mouth and a perforated plate bounded by the periphery of the mouth is located substantially coplanar with the deflector plate. As shown, air enters a chamber 14 from a supply duct 17 and passes through a tubular part 13 in the chamber normal to the supply duct axis into a diffuser 11 formed of a dished or flared plate having a central aperture 12. The deflector plate 18 turns the air away from the diffuser axis to pass out through the perforated plate 19. The ratio of the area of perforations in this plate to the gross area of the perforated portion is between 0.40 and 0.45.
Patent GB-886442-A (GB)
Title: Improvements in or relating to the electrodeposition of bright nickel
IPC: C25D3/18
Filed: 1959-12-02
Abstract: 886,442. Nickel-plating baths. METAL & THERMIT CORPORATION. Dec. 2, 1959 [Dec. 18, 1958], No.40980/59. Class 41. A nickel-plating bath includes primary and secondary brightening agents in which the primary brightening agent has the formula in which N, N<SP>1</SP> are pyridine, quinoline or isoquinoline; R, R<SP>1</SP>, R<SP>11</SP> are alkyl groups of 1 to 4 C atoms ; a, b, c, d are 0 or 1, and the methylene group is attached to nuclear N atom of N<SP>1</SP> ring and to a C atom in alpha or gamma position to the N atom in the N ring. Examples given in a list include 1-(2-quinolyl methyl)-pyridinium iodide, α - pyridinium - 1 - methylquinaldinium di-methosulphate. The anions X, X<SP>1</SP> may, for example, be halogen, chloracetate, citrate, and ethosulphate. Due to the active -CH 2 - group, these compounds are highly colored by addition of picryl chloride, or chloranil, and thus provide analytical control of the process. As secondary brightening agents, sulphones, aromatic sulphonic acids, e.g. saccharin, sulphonated dibenzo-thiophene, o-sulphobenzaldehyde, naphthalene tri-sulphonate or salts thereof, may be used. Auxiliary brightening agents, e.g. 2 - butene - 1,4 diol, and N - vinyl - 2 - pyrollidone may be present. Nickel salts specified are sulphate and chloride. Boric acid and wetting agents may be added.