baber/WOPTO huggingface dataset:
Patent GB-978307-A (GB)
Title: Improvements in or relating to the manufacture of foamed polyurethanes
Inventor: CHAPMAN JOHN FREDERICK
IPC: C08G18/50
Filed: 1962-10-03
Abstract: Foamed polyurethanes are obtained by reacting hydroxyl group containing polymers containing at least two isocyanate reactive groups per molecule in the presence of (1) a gas forming agent such as water or a non-isocyanate reactive organic liquid with a boiling point not exceeding 75 DEG C. and (2) a preformed reaction product of tolylene diisocyanate with a polyester which contains at least three hydroxyl groups per molecule and which is the reaction product of a polycarboxylic acid with a mixture of at least two polyhydric alcohols each of which contains at least three hydroxyl groups per molecule. said polyester being used in such proportions as to react with from 10% to 40% isocyanate groups in the tolylene diisocyanate. The tolylene diisocyanates are preferably the 2:4 and 2:6 isomers and mixtures thereof. Suitable polyhydric alcohols for the preparation of the polyester include glycerol, trimethylolethane, trimethylolpropane and other hexanetriols and pentaerythritol and sorbitol.  Specified carboxylic acids are succinic, glutaric, adipic, seberic, azelaic, sebacic, phthalic, isophthalic and terephthalic acids, trimesic, trimellitic, tricarballylic and mixtures thereof. The most suitable polyesters are those obtained by reacting two or more members of the group consisting of trimethylolpropane, trimethylolethane glycerol and pentaerythritol with adipic acid or mixtures of adipic and phthalic acid. The polyisocyanate composition may be prepared at temperatures of from 20 DEG C. to 110 DEG C. in the presence of acidic materials e.g. acetyl or benzoyl chloride.  Organic gas forming agents are monofluorotrichloromethane, dichlorodifluoromethane dichloromonofluoromethane, monochlorodifluoroethane, dichlorotetrafluoroethane, 1:1:2 trichloro-1:2:2-trifluoroethane, dibromo-difluoro methane and monobromotrifluoroethane. Catalysts may be incorporated in the mixture, particularly tertiary amines such as triethylamine dimethylethylamine, dimethylbenzylamine, dimethylcyclohexylamine, dimethylphenylethylamine, tetramethyl-1:3-butanediamine, triethylene diamine. N-alkylmorpholines, N-alkyl pyrrolidines, N-alkylpiperidines, pyrollizidine, b -dimethylaminopropionamide and fully N-substituted 4 aminopyridines such as 4 dimethylaminopyridine. Other catalysts include dibutyltin dilaurate, dibutyl tin diacetate, iron acetylacetonate, manganese acetylacetonate, stannous octoate, lead acetate and lead octoate.  Surface active agents may be added e.g. siloxano-oxyalkylene block copolymers, oxyethylated phenols, oxyethylated fatty alcohols and block copolymers of ethylene and propylene oxides. Other additives include foam stabilising agents e.g. ethyl cellulose, colouring matters, fillers, plasticizers, flame retardants such as tri-(b -chloroethyl) phosphate or antimony oxide and antioxidants such as tertiary butyl catechol. In the examples, polyethers used include the polymer of propylene oxide with triethanolamine, of propylene oxide with trimethylolpropane and polyoxypropylene triol.
Patent GB-368834-A (GB)
Title: Improvements in and connected with the cracking of nuts for the winning of kernels thereof
IPC: A23N5/00
Filed: 1930-12-12
Abstract: 368,834. Cracking nuts. MAPLETON, H., Pear Tree Cottage, Hale, near Liverpool, and MAPLETON'S NUT FOOD CO., Ltd., Moss Street, Garston, Liverpool. Dec. 12, 1930, No. 37470. [Class 59.] Brazil nuts &c. are cracked by a rapid pressure or blow delivered by jaws or members 2 normally disposed in a divergent manner from one another and adapted to be moved laterally by cams 7 on rotating discs 5, a movable support 14, 15 being provided to carry the nuts between the jaws. The jaws 2 are pivoted at 18 to a baseplate 1 and are made to diverge by a spring 3. The cams 7 on the rotating discs 5 have a gradually inclined portion 8, Fig. 3, which moves the jaws slightly to grip the nut before the sudden pressure, produced by the cam 7, is applied. The movable support comprises rollers 14 and fixed rectangular bars 15 provided at their ends with fixed and idle wheels 16, 17 respectively so that the rollers turn in the same direction and feed the nuts forwardly into the jaws. The nuts may be fed to the movable support by an elevator and belt conveyer. An air blast may be supplied under the movable support to carry off the kernels and shells. The jaws may be provided with a concave gripping portion which prevents the nuts from leaving the jaws during the cracking process. When the nuts are fed to the jaws by hand the jaws may be provided with longitudinal grooves for gripping the nut. One cracking jaw may remain stationary.
Patent GB-997112-A (GB)
Title: Improvements in or relating to patterning mechanism for jacquard circular knitting machines
IPC: D04B15/66
Filed: 1963-09-25
Abstract: A patterning mechanism for a Jacquard circular knitting machine has a common endless pattern band which effects the selection and positioning of selecting members arranged in a series of partial pattern selecting and storing drums which act on the needles or jacks of the machine.  The successive pattern recording groups on the pattern band required for reproducing a complete design are disposed alternately along two or more tracks on the pattern so that the end of one group overlaps the start of the following group. Specifications 591,269, 689,232 and 744,128 are referred to.
Patent GB-816249-A (GB)
Title: Improvements in preparation of acrylonitrile
Filed: 1956-12-11
Abstract: Catalyst compositions comprising cuprous bromide, together with ammonium or alkali metal bromide, dissolved in acetamide, formamide, pyrrolidone, piperidone, caprolactam or the N-methyl or N-ethyl derivatives of these are used to catalyse the formation of acrylonitrile from HCN and acetylene.  Examples describe catalysts comprising cuprous bromide, ammonium bromide and cuprous cyanide dissolved in pyrrolidone, piperidone or caprolactam and cuprous bromide and ammonium bromide only dissolved in dimethylformamide or acetamide.  Specification 811,136 is referred to.ALSO:Acrylonitrile is prepared by reacting HCN and acetylene in the presence of cuprous bromide dissolved in acetamide, formamide, pyrrolidone, piperidone, caprolactam or the N-methyl or N-ethyl derivatives of these. Ammonium or alkali metal bromide is also present, preferably in the minimum amount necessary to obtain complete solution of the cuprous bromide.  The reaction temperature ranges from about 60 DEG  C. to the boiling-point of the catalyst.  In examples HCN and acetylene are reacted in the presence of catalysts comprising cuprous bromide, ammonium bromide and cuprous cyanide dissolved in pyrrolidone, piperidone or caprolactam, and cuprous bromide and ammonium bromide only dissolved in dimethylformamide or acetamide.  Specification 811,136 is referred to.
Patent GB-619793-A (GB)
Title: Improvements in canisters
IPC: B65D41/28
Filed: 1946-12-24
Abstract: 619,793. Stoppers &c. PATON, CALVERT & CO., Ltd., and PATON, W. Dec. 24, 1946, No. 37846. [Class 125 (iii)] A canister 1 of metal or having a metal end piece 2 has its opening 4 formed with a short internal flange 5 the lower edge 6 of which is rolled or inturned, the opening being closed by a cork or other resilient non- metallic plug 7 carried by a metal cap 9. The cap may have a flange 10 fitting the neck portion 3 of the canister.
Patent GB-1084784-A (GB)
Title: Improvements in and relating to pedals
IPC: G05G1/487
Filed: 1964-09-18
Abstract: 1,084,784. Pedals. J. TOMLINSON. Sept. 17, 1965 [Sept. 18, 1964], No. 38104./64. Heading B7E. A pedal for automobiles and farm and industrial machinery comprises means to reduce friction between the pedal plate and the sole of the foot of the operator, during depression of the pedal plate by the foot and while the back of the heel of the shoe contacts a floor or base to act as a fulcrum for the shoe, said means comprising an interposed member having a base plate f slidable on four balls or rollers, roller bearings or plasters (not shown) along a front plate a secured by rivets and spacers c to a back plate b affixable to a pedal by straps passed between front and back plates a, b, passed round the pedal and secured by bolts (not shown). A helical tension return spring is attached to the base plate f and to the front plate a; and a bottom stop for the plate f is secured to the plates a, b by a countersunk bolt e and a top stop is formed by bending of the plate a. The balls are retained in angle members d, h on the plates a, f by retainers i. A rubber foot-pad j is attached to the base plate f. Fig. 6 (not shown) shows the means applied to a pedal plate supported on a pedal rod rigid therewith, and Fig. 7 (not shown) shows the means applied to a pedal plate pivoted to the floor or base and to a pedal rod.
Patent GB-1047540-A (GB)
Title: Steam turbine installations and interstage reheaters therefor
Inventor: CULVER LEONARD JAMES
IPC: F01K7/22
Filed: 1964-09-18
Abstract: 1,047,540. Steam turbine plant. FOSTER WHEELER Ltd. Sept. 14, 1965 [Sept. 18, 1964], No. 38177/64. Heading FIT. In a marine steam turbine installation, a reheater 16 between stages 12, 14 is heated by combustion gases from at least one burner 22 receiving combustion air from a fan 24. The combustion gases are cooled in pipe 20 to a temperature of say l420‹F by used gases recirculated by a fan 28, the proportion of gases recirculated being at least 70%. The recirculated gases may be delivered to the pipe 20 at a position upstream of the burner and thereby supply secondary combustion air. The supply of fuel and air and the proportion of gases recirculated may be controlled automatically in accordance with the needs of the associated boiler 10 or plant operated thereby, for example, in accordance with the steam flow rate through the reheater and the outlet steam temperature therefrom. The exhausted gases after passing through an air pre-heater 32 and a boiler feedwater heater 34 flow to the funnel at about 330‹F. The reheater may be put out of commission by valves 36. The reheater could be used for interstage reheating of a number of turbines supplied by the same or different boilers.
Patent GB-904719-A (GB)
Title: Improvements in or relating to display apparatus for articles such as chilled or frozen foods and food products
IPC: A47F3/04
Filed: 1957-12-10
Abstract: 904,719. Refrigerators. HAPPER, W. R. A. Dec. 9, 1958 [Dec. 10, 1957], No. 38282/57. Class 29. Display shelves 75, 76 provided with cooling means are carried by a vertical spindle 52 rotatably mounted in a base 10 and rotated by an electric motor 13. As shown, a compression system 14 on frame 45, which rotates with the shelves, supplies refrigerant through pipe 65 to evaporator coils 67, 68 located between the shelves and an underlying insulation layer 63 or 59. The shelves slope downwards so that moisture from the upper shelf falls on to the lower shelf, moisture from the latter falling into gutter 37. Glazed walls 72, 39, which may be double glazed, surround shelves 75, 76, respectively. Refrigerated partitions may be disposed radially to divide the shelves into compartments and a refrigerated wall may be located at the inner end thereof. Pegs at the shelf periphery may retain articles thereon. In a modification, the refrigerating system is mounted on the base 10 and the refrigerant is conducted through a rotating seal device on shaft 52 to the evaporators. Alternatively the evaporator also is on the base, and a fan circulates air over it, through a rotating seal device, up the shaft 52, radially outwards over the shelves, radially inwards under the shelves, and back to the fan by a stationary duct. The apparatus is surmounted by a rotating illuminating assembly 81.
Patent GB-861777-A (GB)
Title: Improvements in or relating to nuts and methods of manufacturing them
IPC: F16B37/08
Filed: 1957-04-05
Abstract: 861,777. Moulding nuts. NAIMER, H. April 5, 1957 [April 23, 1956], No. 38371/59. Divided out of 861,774. Class 87(2). [Also in Group XXV] A nut consists of two or more parts 1, 2, Fig. 2, interconnected by a flexible web 8 about which the parts are foldable to form the nut, and is moulded from synthetic thermoplastic material, e.g. a polyamide or a superpolyamide. The mould 10, 11 has screwed cores 12 and the nut is removed from the mould by splitting the mould and lifting out without an unscrewing action. The parts may be held together after folding by one or more pegs 3 engaging sockets 4, or by being welded together, or by being assembled in a mating recess, in which latter case, the walls of the nut and recess are tapered. In another arrangement, the web 25, Fig. 3, interconnects parts 25<SP>1</SP> and the mould 27, 30 has a screwed core 26 carrying partitions 28. The nut is removed after splitting the mould by bending parts 25<SP>1</SP> between the partitions away. from the core.
Patent GB-1447661-A (GB)
Title: Method of machining by erosive eletrical discharges
IPC: B23H1/02
Filed: 1973-08-14
Abstract: 1447661 Electro-erosion ATELIERS DES CHARMILLES SA 14 Aug 1973 [28 Aug 1972] 38391/73 Heading B3V [Also in Division H3] In a method of electrical discharge machining a workpiece 2 by applying pulses to the machining gap 1-2 by a direct current source S, the duration of the pulse intervals is cyclically and repetitively varied so as to adjust the average machining current. In one embodiment, the pulses are supplied to the machining gap 1-2 by a supply source S and a switching transistor 3 which is controlled by monostable flip-flops 4, 5. The latter are controlled by a Schmitt trigger 7 actuated by a voltage across a resistor R 1 . The pulse intervals are controlled by the duration of the unstable state of the flip-flop 5 which is dependent on the supply voltage of an amplifier 8 determined by the sum of three potentiometer voltages 9, 10, 11. For each machining pulse supplied to the gap 1-2, a pulse is introduced into a counting assembly 12 having a counter 13 and two discriminators 14, 15. When n 1  pulses have been counted, a signal is emitted from the discriminator 14 and applied to a flip-flop 20 whereupon the supply to the potentiometer 10 is discontinued resulting in a lower output voltage of the amplifier 8 and an increase in the pulse interval from T i1  to T i2 , Fig. 1a. When a further n 2  pulses have been counted by the discriminator 15, the counter is reset to zero and the potentiometer 10 is again supplied by the flip-flop 20 causing the pulse interval to again have the duration T i1 . The pulse sequence shown in Fig. 1c is produced by connecting a counting assembly 21 and a flip-flop 26 in circuit by a switch 27. When n 4  pulses have been counted by the assembly 21, the supply to the potentiometer 11 is also discontinued causing the pulse interval to increase to T i3 . When switches 28,29, 30, 31 are switched over, the machining parameters are automatically adjusted by a device 32. In another embodiment (Fig. 3, not shown) the amplifier 8 is supplied by two potentiometers 9, 10, the latter being supplied by a Schmitt trigger (34) which applies a signal to an AND gate (36) controlling the transistor 3. An output from the trigger (34) of duration T 2  is produced when the voltage from a generator (39) is greater than that of a potentiometer (40), whereupon the potentiometer 10 is interrupted. The pulse sequence obtained is dependent on the position of switches (37, 38) in circuit with the gate (36).
Patent GB-1057633-A (GB)
Title: Thermal insulators
IPC: F23M5/08
Filed: 1963-09-30
Abstract: A thremal insulator which is applied to a wall subjected to hot fluid comprises a number of sealed tubes arranged parallel to each other and to the wall and extending along the whole length of the wall. The tubes may be partially evacuated or filled with the heating fluid and are held in bundles, e.g. by straps.  The bundles may have trapezoidal or T-shaped cross-section, so that only alternate bundles need be fixed to the wall.  Individual layers of tubes within a bundle may be separated by thin sheets, e.g. of aluminium, to reduce convection and the bundles may be partially covered, e.g. by a perforated plate on the outward facing side.  Circular walls may be protected by toroidal tubes having a non-rigid connecting member joining the two ends into a closed loop.
Patent GB-1116717-A (GB)
Title: Suspension system for heavy vehicles
IPC: B60G5/00
Filed: 1966-08-26
Abstract: 1,116,717. Articulated vehicles; adjusting vehicle height. CATERPILLAR TRACTOR CO. 26 Aug., 1966 [21 Sept., 1965], No. 38402/66. Headings B7D and B7H. In a vehicle comprising a body 10, a tractor unit 12, a liquid-filled telescopic king-pin 15, which sustains the weight of the body 10 and its load, and a wheel suspension system including gas-filled telescopic struts 17, 18, 19 and 20, means are provided to direct additional gas to the struts when the load causes a predetermined rise in the king-pin liquid pressure. On a rise in the liquid pressure, which is communicated to a valve 35 through a conduit 40 and the hollow interior of a valve 30, which itself controls the liquid volume of the king-pin, a piston 42 urges the spool 43 of the valve 35 against a spring 44, permitting pressure liquid from inlet 46 to enter conduits 47 and 48 and hence move a piston 37 in each of two cylinders 36 downwardly to displace gas from the lower chambers 38 of the cylinders 36 into the corresponding pairs of struts 17, 18 or 19, 20. On a drop in the king-pin liquid pressure, liquid is vented from the conduits 47 and 48 through the valve 35 permitting gas from the struts to return to the chambers 36. The vehicle shown comprises a body 10 with bottom discharge doors supported through king-pins 15, 16 on a pair of powered tractor units 12, 14 and each axle is supported by a strut disposed in front of the axle on one side and a strut disposed behind the strut on the other side.
Patent GB-875075-A (GB)
Title: Modulating or control arrangements for oscillators
IPC: H04R3/06
Filed: 1957-12-10
Abstract: 875,075. Amplitude modulation systems; valve oscillator and amplifier circuits. ELTRO G.m.b.H. Dec. 10, 1957 [Dec. 11, 1956], No. 38422/57. Classes 40(5) and 40(6) An oscillator comprises relatively detuned anode and grid circuits 12, 17 coupled to form a negative feedback path to the grid and to stabilize the amplitude/frequency working point of the oscillator when modulation is applied to vary the detuning and produce amplitude modulation of the oscillator output, a third resonant circuit 21 producing negative feedback is included in the cathode circuit, resonant at a frequency below that of the tuned anode circuit 12 and the operating frequency, if the latter is lower than the anode resonance frequency. Also, since oscillator frequency drift gives rise to harmonics, the circuit 21 may be tuned to a harmonic or sub-harmonic of the above frequency. A grid detector circuit 18, 19 may rectify the amplitude modulated oscillations so that the oscillator acts also a modulation amplifier. The modulating element may shunt at 17c, 12c or 21c any of the resonant circuits, and may be a photo-sensitive capacitor, a dielectric bolometer, condenser microphone, or reactance valve; or the transformer windings 17a, 12a may be replaced by an inductance varied by pressure or by an adjacent sound responsive membrane, or by an A.C. or D.C. electric current. Alternatively, the valve gain may be varied, or its anode/grid capacitance 24 modulated, or the coupling of coils 12a, 17a varied by variably saturating the core, or the capacitive coupling 22 may be modulated. Unmodulated elements 12c, 21c similar to a modulating element, e.g. 17c, may shunt the other tuned circuits, to compensate ambient conditions. A double valve may be used for valve 10, one being a magic eye indicator, the other operating a control relay; or a transistor oscillator can be used. A cathode choke 16, or R-C circuit, or a large resistor connected between HT+ and the suppressor grid of a pentode, may be used to linearize the modulation. The anode, grid and cathode may be connected to taps on the tuned circuits. The valve 10 may be a power type, and amplified modulating voltage taken directly from across the choke 16 to a load, e.g. loudspeaker. Specification 844,940 is referred to.
Patent GB-950649-A (GB)
Title: Motor vehicle steering column gear shift mechanism
Inventor: BROOK GEOFFREY JOHN
IPC: F16H59/04
Filed: 1961-10-27
Abstract: 950,649. Change-speed control. VAUXHALL MOTORS Ltd. Oct. 12, 1962 [Oct. 27, 1961], No. 38525/61. Heading F2D. A steering-column-mounted shift-control for a four-speed and reverse gear on a vehicle comprises the usual operating rod 5 parallel to the steering-column and having sliding and turning movements to select and execute a gear shift. The upper end portion of the rod 5 is axially slidable and rotatable in a bore in a fitting 9 which has a screw-threaded connection 8 in a fixed bracket 3. At its upper end the rod 5 has a bent-over portion forming an arm 12 on which a ball 14 is slidably mounted and urged to the left by a spring 15. A hand lever 22 is pivotally mounted on the fitting 9 by means of cup-shaped bearings 27 which are mounted in apertures of arms 20, 21 of the lever 22 and arms 10, 11 of the fitting 9 and which form seats for compression springs 28 the other ends of which engage flats 13 formed on the rod 5. The hand lever 22 is hollow and is provided with a sleeve 29 which is chamfered at 30 to co-operate with the ball 14. A rod 34 is axially slidable within the lever 22 and at its left-hand end carries a manual knob 35 and at its right-hand end receives an L-shaped abutment member 36. A spring 39 urges the abutment member 36 to the right into a position in which a horizontal axially extending leg 38 axially overlaps the end of the arm 12. When the manual knob 35 is pulled to the left, the leg 38 is moved clear of the end of the arm 12, whereby the lever 22 may be rotated clockwise about the bearings 27 to move the mechanism into the reverse gear position, which movement would otherwise be prevented by the leg 38. To engage a forward gear the lever 22 is first pivoted about the bearings 27 to a horizontal position for first and second gear and to a downward position for third and fourth gear, and is then rotated about the longitudinal axis of the operating rod 5 in the appropriate direction.