baber/WOPTO huggingface dataset:
Patent GB-1193487-A (GB)
Title: Production of Transparent Polyamides
Inventor: FALKENSTEIN G
IPC: C08G69/00
Filed: 1967-10-17
Abstract: 1,193,487. Polyamides. BADISCHE ANILIN- & SODA-FABRIK A.G. 17 Oct., 1967 [18 Oct., 1966], No. 47231/67. Heading C3R. Transparent polyamides are prepared by condensing dimethyl-bis-(4-aminocyclohexyl) methane, containing 50-70% of the trans, trans isomer, with a C 6-10  dicarboxylic acid or a polyamide forming derivative thereof, e.g. a dichloride or a diester, especially with adipic acid. From 1-80% by weight of the total polyamide forming substance of other polyamide forming materials, e.g. caprolactam, may also be condensed therewith.
Patent GB-1357934-A (GB)
Title: Differntial dyeing of polyamides
IPC: C09B1/34
Filed: 1971-10-11
Abstract: 1357934 Preferential dyeing of polyamides CROMPTON & KNOWLES CORP 11 Oct 1971 [12 Oct 1970] 47277/71 Heading D1B The dyestuffs of the general formula: wherein M is H, Na, K or NH 4  are R is H, C1, NO 2  or CH 3  are used in the preferential dyeing of polyamide yarn or textile material, the bath being neutral to mildly alkaline so that the more receptive component is preferentially dyed.
Patent GB-1486435-A (GB)
Title: Process for the separation of acid mists from the waste gases of sulphuric acid plants
IPC: C01B17/775
Filed: 1974-11-01
Abstract: 1486435 Removing acid mist from waste gases CARL STILL 1 Nov 1974 [3 Nov 1973] 47382/74 Heading BIT [Also in Division Cl] Sulphuric acid mist is recovered from waste gases produced by wet-catalysis plant, wherein hydrogen sulphide and hydrogen cyanide are burned in the presence of ammonia to make sulphur trioxide which is then absorbed into sulphuric acid, by first cooling the waste gases by mixing therewith a quantity of air whose volume is 10-50% that of the waste gases, then passing the mixture through a mechanical separator 2 in the form of a quartz wool filter. The cooling coalesces the acid mist which drains off through outlets 15, 16. Air inlet 10 and waste gas inlet 9 are arranged to enable the air and gas to mix between 1 and 5 seconds before reaching separator 2.
Patent GB-478138-A (GB)
Abstract: 478,138. Seats. BREUER, M. July 10, 1936, No. 19236. [Class 52 (ii)] A chair comprises a seat, normally with a back integral therewith, of sheet material such as plywood, synthetic resin or fibre which is rigid but elastically resilient, supported on a frame comprising a pair of upstanding front members 2 and a pair of rear members 5, the front and rear members at each side being connected at their lower ends by members 1 resting on the floor at the front and rear, and the upper ends of all the members being connected by, and only by, the seat. Preferably the supporting members are of curved wood, and shaped so as to be resilient. The rear niembers 5 may be reinforced by webs 14, and connected together by a transverse member 11. The seat may be formed with a head rest 12 and front rest 13, and is connected to the frame by lugs 9, 10 morticed into the upper parts of the members 2, 5. Other shapes of chair are shown, with and without armrests and footrests. Specification 416,758 is referred to.
Patent GB-1405522-A (GB)
Title: Aqueous drilling fluid
IPC: C09K8/16
Filed: 1973-10-15
Abstract: 1405522 Boring earth &c G L MILLER and H K F BARTHEL 15 Oct 1973 [24 Oct 1972] 47960/73 Heading E1F A drilling fluid comprises brine to which MgSO 4  and dolomite, together with MgO and/ or CaO are added. The brine may be sea water, or fresh water to which salts, selected from NaCl, KCl and MgCl 2  in accordance with the formation being drilled, are added. The oxides may be added as dolomitic quick lime; if CaO is not added, Ca(OH) 2  may be needed for pH control. The fluid also contains starch, such as 3:1 corn starch : tapioca flour, and a weighting agent such as iron oxide, barite or galena.
Patent GB-1466382-A (GB)
Title: Inhalation devices
IPC: A61M16/20
Filed: 1973-10-18
Abstract: 1466382 Inhalation devices CYPRANE Ltd 16 Oct 1974 [18 Oct 1973] 48648/73 Heading A5T An inhalation device providing a gas-air mixture on demand, or alternatively a puregas supply, to a patient, comprises a body member having a first chamber 30a, a demand-valve 11 admitting gas into the chamber, a second chamber 31 having an air-inlet 38 and an air-outlet 32, closed by a non-return diaphragm-valve 35 and communicating with a third chamber 51a from which the breathing-supply is taken through an outlet 5, the non-return valve comprising an element seating on a surface surrounding the outlet 32; communication between the first and third chambers being by way of one or more orifices 37 adjacent to the diaphragm-valve and upstream, relative to the gas-flow, of the seating surface, so that there is an upstream-directed step from the seating surface to the orifice or orifices, whereby, on suction being applied by the patient, air is drawn from the second chamber through the non- return valve 35 and entrains gas from the orifice(s) to produce a gas-air mixture in the third chamber; the device also includes means 25 for over-riding the demand-valve to allow a constant flow of pure gas into the first chamber and through the orifice(s) into the third chamber while the non-return valve is closed. The body member comprises a series of modules 1, 2, 3, 4, secured together, the chamber 30a being formed between the modules 1 and 2, the chamber 51a between the modules 2 and 3 and the outlet 5 being formed in the module 4. The demand-valve 11 is a mushroom-valve 14, 15 with a stem 12 that is tiltable, to open the valve, by a protuberance 23 secured to a diaphragm 16 forming a wall of the chamber 30a. The diaphragm is biassed by a spring 22 mounted inside the button 25 which is, itself biassed by a further spring 27 into the inoperative position shown, but can be depressed to override the demand-valve. The air-inlet 38 to the chamber 31 comprises an inlet-passage which is sealed by a resilient band 41 passing around the module 2 and having a series of different-sized apertures 41a which can be registered with the passage by moving the band. The third chamber 51a, which receives the gas-air mixture from the first two chambers, is closed by a further diaphragm 43 having a one-way flap-diaphragm valve 49 at its centre. Inhalation, through the outlet 5, opens the valve 49, to draw gas from the chamber 51a, the valve 35 also opening to draw air from the chamber 31: exhalation closes the valve 49 and compresses the diaphragm 43 to open an outletpassage 52 to atmosphere. In the demandmode, with the button 25 depressed, pure gas passes from the chamber 30a through the apertures 37 and chamber 51a and opens the flap 49; since there is no suction, the valve 35 remains closed and no air enters the outlet 5.
Patent GB-1096461-A (GB)
Title: Vibration damping means
Inventor: MCLELLAND GEOFFREY STAINTHORPE
IPC: F16F7/01
Filed: 1964-12-01
Abstract: 1,096,461. Vibration dampers; expansion joints; flexible tubes. ENGLISH ELECTRIC CO. Ltd. Nov. 30, 1965 [Dec. 1, 1964], No. 48720/64. Headings F2G, F2P and F2S. Vibration damping means for a metal expansion bellows 10 used for joining two pipes, not shown, e.g. for a main CO 2  coolant gas in a nuclear reactor, comprises a number of ring tubes 13 of resilient material such as rubber, each of the tubes being filled with a granular material, e.g. sand or vermiculite, and lodged in a groove 12 in the bellows. If the latter is of helical form a continuous tube is provided for each start of the helix. To prevent shifting of the sand along the tubes each of the latter is provided with a number of circumferentiallyspaced plugs. In a modification, Fig. 2 (not shown), the tubes 13 are omitted, sand being trapped in the grooves 12 by a silicone rubber sleeve (20) stretched over the bellows. In a further modification, Fig. 3 (not shown), a bellows (10), connected to gas ducts (31, 31) is sealed in a box (33) having a flexible bellows portion (34). The space in the box 33 above a wire mesh screen (36) is filled with sand (39) and, when compressed air is fed to an inlet (37), through the sand to an outlet (38) with a filter (40), the sand behaves as a fluidized bed. The damping effect of the latter can be varied by changing the compressed-air flow. Vermiculite or graphite can be used instead of sand. Instead of providing the box (33) with the bellows portion (34) it may be arranged to slide axially on the ducts (31, 31).
Patent GB-1193826-A (GB)
Title: Semiconductor Device Fabrication
Inventor: WALKER JOHN SIDDALL
IPC: H01L21/3065
Filed: 1966-11-01
Abstract: 1,193,826. Semi-conductor device. TEXAS INSTRUMENTS Ltd. 27 Oct., 1967 [1 Nov., 1966], No. 48846/66. Heading H1K. A method of making a planar transistor comprises forming an upstanding region 16 on the surface of a silicon wafer 11 doped to form a collector 12, diffusing the impurity to form the base zone 19 into and around this region thus producing a collector-base junction with an upstanding portion 21 below the region 16, and finally diffusing an impurity to form the emitter zone 23 into and within the confines of the upstanding region 16 so that when the collectorbase junction advances further into the collector in that region beneath the emitter, during the diffusion of the emitter, the final collectorbase junction is either plane, or retains to some extent its upstanding portion 21. Ohmic contacts are applied as usual to the emitter, base and collector.
Patent GB-1132139-A (GB)
Title: Sewing machine
IPC: D05B69/22
Filed: 1966-11-01
Abstract: 1,132,139. Sewing machines. G. HODKINSON. 17 Oct., 1967 [1 Nov., 1966]; No. 48851/66. Heading DIG. A sewing machine comprises a drive shaft and a driven member connected to the drive shaft so as to be capable of overrunning the drive shaft, the driven member being arranged to drive the machine and also being mechanically connected to a pedal, whereby the machine may be turned by movement of the pedal when the drive shaft is stationary. A motor 10 is coupled by a friction clutch to a drive shaft (19) which is in turn coupled by a freewheel (20) to a driven member in the form of a pulley 21. The latter has a first groove 21b coupled by a belt 24 to the sewing machine, and a second groove 21a receiving a belt 25 one end of which is connected to a lever 28 and the other end of which is connected to a tension spring 26. Lever 28 is connected by a rod 34 to a treadle. A lever 13 is connected by a rod 12 to a treadle, and by a rod 14 to one arm 15 of a double-armed lever rigid with a spindle 16 screwed into the motor housing. The other arm 15a is connected by a tension spring 17 to a lever arm 18 rigid with a similar spindle 16. On actuation of lever 13 via rod 12, the spindles 16 screw into the motor housing for interengaging the clutch elements to rotate pulley 21 for driving the sewing machine. After release of lever 13 to stop the machine, lever 28 may be actuated via rod 34 to rotate pulley 21 sufficiently to locate the needle in a desired position.
Patent GB-1440355-A (GB)
Title: Up-and-over doors
IPC: E05D15/44
Filed: 1973-10-19
Abstract: 1440355 Up-and-over doors; doors TUBAUTO 19 Oct 1973 [20 Oct 1972 17 May 1973] 48940/73 Headings E1J and E2M In an up-and-over door comprising a rigid panel 1 retained and guided by rollers 2 which move in vertical U-shaped guidance members 3 having unequally long branches 13, 14 located on each side of the door opening, the rollers are positioned in the lower portion of the panel which is supported by two levers 5 articulated at one end of each lever to the upper part of the door opening and at the other end of each lever to the central portions of the sides of the panel 1. The unequally long branches 13, 14 of the U- shaped guidance members 3 are provided with facing ribs 16, 17 which are adapted to be engaged by truncated cone-shaped surfaces 15 on the rollers 2. To assist in assembling the up-and-over door unit, positioning members 4 are adapted to be detachably secured to the panel 1 and U-shaped vertical guidance members 3. After fixing they door frame, stud bolt means 25 is removed and the half spacers 18, 18' making up the positioning member 4 fall by gravity to free the panel 1 from its attachment to the guidance members to render the door ready for use.
Patent GB-1404048-A (GB)
Title: Moulded plastics bearing assembly
IPC: F16C23/04
Filed: 1972-10-25
Abstract: 1404048 Spherical bearing surfaces KAMATICS CORP 25 Oct 1972 [4 April 1972] 49130/ 72 Heading E2F [Also in Divisions B5 and F2] A bearing member comprises a cured mixture of an acrylate composition and a particulate solid lubricant.  The solid lubricant is preferably PTFE, molybdenum disulphide, silver or lead powder, graphite fibres or fibreglass flock. The acrylate composition preferably constitutes 50 to 70% by weight of the mixture. The member is used in an assembly in which the other bearing member has a surface of metallic or ceramic material, the surface having a coating of a parting agent which prevents adhesion of the bearing surfaces. The metallic material may be stainless steel, titanium or aluminium or alloys thereof. The ceramic material which may be used on a substrate of titanium or titanium-based alloy, may be Cr 2 O 3 , TiO 2 , Al 2 O 3 , TiC, WC or mixtures thereof. The parting agent may be PTFE, silicone or wax emulsion. The assembly is made by coating the metallic or ceramic surface with the parting agent and then moulding the mixture of acrylate composition and solid lubricant around the surface and in an opening in a housing, so that the mixture is secured in the housing but so that there may be relative movement between the mixture and the coated surface. The mixture is cured either in the presence of oxygen at 100 to 325F or in the absence of oxygen at ambient temperatures up to 325F.
Patent GB-1533248-A (GB)
Title: Roof support assemblies for mineral mining installations
IPC: E21D23/06
Filed: 1975-12-02
Abstract: 1533248 Mine roof support GEWERKSCHAFT EISENHUTTE WESTFALIA 2 Dec 1975 [18 Dec 1974] 49439/75 Heading E1P A mine roof support has a goaf shield 18 pivoted to a floor sill 16, a ram 28 for pivoting the shield relative to the floor sill 16, a roof bar 23, and a mechanical linkage 20, 26 connected between the roof bar 23, the shield 18, and the floor sill 16 which ensures that the front end 23a of the roof bar moves along a vertical path X when the shield is pivoted. The mechanical linkage comprises a bell crank 20 pivoted on the shield 18, and a rod 26 pivoted at one end on the floor sill 16. The upper limb 22 of the bell crank is pivoted to the roof bar 23, and the lower limb 21 is pivoted to the other end of the rod 26. The bell crank 18 is pivoted to the shield 18 at an intermediate point 19 on the lower limb 21. The roof support may be connected by an advancing ram 29 to a scraper-chain conveyor 15 with a cutting machine 14 which is movable along it.
Patent GB-1117749-A (GB)
Title: Gas burner
IPC: F23D14/10
Filed: 1965-11-22
Abstract: 1,117,749. Gas burners. JOH VAILLANT K.G. 22 Nov., 1965 [18 Dec., 1964; 31 Dec., 1964], No. 49442/65. Heading F4T. The outlet of a mixing chamber 5 is closed by a strip insert 6 having transverse discharge slots 7 and having its ends, or its longitudinal edges, Figs. 5, 6, not shown, bent into U-shape to form pressure reducing chambers, 9, 19 beneath the end discharge slots 7<SP>1</SP>, or beneath the ends of all the discharge slots (Figs. 5, 6). Part of the mixture enters the pressure reducing chambers 9 through holes (10) in the ends of the strip 6 or through a gap (11) between the end of the insert and the main part thereof and the mixture discharges through the end slots 7<SP>1</SP> at reduced rate of flow to provide adhering flames which continuously ignite the flames at adjacent slots.
Patent GB-1154385-A (GB)
Title: Improved Photographic Developing Combinations
Inventor: WILLEMS JOZEF FRANS
IPC: G03C5/30
Filed: 1966-11-04
Abstract: 1,154,385. Photographic silver halide development. GEVAERT-AGFA N.V. Oct. 18, 1967 [Nov. 4, 1966], No.49658/66. Heading G2C. [Also in Division C4] An exposed photographic silver halide emulsion layer is developed with a mixture of developing agents comprising an anionic developing agent, e.g. hydroquinone or a derivative thereof and 1-phenyl-3-pyrazolidinone, and a bis(pyridone) azine developing agent of the formula:- where R 1  and R 2  are each substituted or unsubstituted alkyl or aralkyl, n and n<SP>1</SP> are each 0 or 1 and Z 1  and Z 2  each represent the atoms necessary to complete a substituted or unsubstituted pyridone nucleus. The developing agents may be present in the developer and/or the light sensitive material and/or an image-receiving material for the silver salt diffusion process.
Patent GB-1115462-A (GB)
Title: Roof support assembly suitable for use in mines
Inventor: BOLTON DOUGLAS HERBERT HEWLETT
IPC: E21D23/00
Filed: 1964-12-07
Abstract: 1,115,462. Advancing mine roof supports. DOWTY MINING EQUIPMENT Ltd. Feb. 25,1966 [Dec. 7,1964], No. 49754/64. Heading F1P. In a roof support assembly comprising a series of fluid pressure operated advanceable roof supports P each having a fluid flow control valve C. V operable manually or by a first pressure signal S1 to cause its roof support to undergo an advancing operation, each support has an associated control means C. M operable to send a second signal S2 to the control valve C. V of another roof support to thereby initiate its advance only after completion of its advancing operation and provided the advance was operated by the signal S1, and not manually. The control means C. M. comprises a housing 1 having a bore 11 containing a piston 8 which when sufficiently pressurised is slidable against the action of a spring 12 to open a valve 2 and thus connect passages 5,7 to cause transmission of the second signal S2. The piston 8 is capable of pressurisation from two sources, and only moves to open the valve 2 when both sources operate together. The first source is constituted by the first signal S1 and acts on the end 18 of the piston while the second source occurs in a passage 17 when the support has completed its advancing operation and acts on an annular area 16 of the piston.
Patent GB-1414248-A (GB)
Title: Semiconductor switching circuit
IPC: H02M3/338
Filed: 1973-10-25
Abstract: 1414248 Switching inductive loads INTERNATIONAL BUSINESS MACHINES CORP 25 Oct 1973 [3 Nov 1972] 49754/73 Heading H3T [Also in Divisions G3 and H2] An inductive load, e.g. the output transformer of a D.C. to A.C. converter, is connected to a supply via a semiconductor switching device 16 and a diode 83 and, in order to prevent excessive loading of the switching device during switch off, a resonant circuit 80, 81, 82 is connected across the switching device with the diode 81 poled to allow half a cycle of oscillation through the switching device and a diode 91 is connected between the capacitor and the supply to conduct if the capacitor terminal voltage rises above the supply voltage. The Figure shows a free running inverter of the type in which the transformer 4 is charged when a switching transistor 16 is conducting and which, when the transistor is non-conducting, discharges into capacitors 13 and 14 to provide negative and positive supplies. Ringing of the leakage inductance during switch-off can cause the transistor voltage to rise excessively and this is avoided by arranging that the leakage inductance resonantly discharges via diodes 83 and 91 into a capacotor to charge it close to the supply value. When transistor 16 is conducting the charge is resonantly reversed through the resonant circuit 81, 80 so that when the transistor is switched off again the capacitor holds the collector at a low voltage level. If the capacitor does not charge sufficiently closely to the supply voltage level the voltage may be enhanced from a further transformer winding (Fig. 2, not shown). The "on" and "off" times of the inverter are controlled as follows. During the "on" time a capacitor 36 charges through a resistor 37 until a comparator 42 detects equality of voltage with a reference level 43 whereupon the comparator renders conducting a transistor 21 which switches on 26 and thus removes the feedback through transformer 30 so that transistor 16 switches off. The output voltage of the inverter therefore decays to a low level which switches off the base curent of a transistor 22. In the meantime a capacitor 36 has discharged through diode 39 to the threshold voltage of a diode 38 so that 21 is non-conducting and if 22 is off the feedback becomes effective again and a new cycle to start. The output voltage of the inverter is controlled by adding together positive voltages received from the circuit at 55 and 56 and, after inversion at 65, negative voltages received at 57 and 58. If the sum value exceeds a reference level at the input of a comparator 73 the latter switches on a transistor 23 to switch off or to maintain off the feedback for the transistor 16.
Patent GB-1447261-A (GB)
Title: Suspension device for a vehicle seat
IPC: B60N2/50
Filed: 1973-10-26
Abstract: 1447261 Vehicle seat suspension SABLE FRERES INTERNATIONAL 26 Oct 1973 [28 Nov 1972] 50007/73 Heading A4U A vehicle seat suspension comprises guides 2, 11 for respectively connecting to the seat and to the vehicle chassis and which are inter-connected by crossed levers 4, 5 pivotally inter-connected at their points of intersection by a shaft 32, the levers being biased by springs 51 to engage the shaft 32 against a cam 33 which is adjustable to alter the instantaneous centre of rotation I of the levers 5 and so the moment of the spring force opposing the moment of any load applied on the seat and acting at the upper ends of the levers 5. The lower ends of the levers 4, 5 have rollers 17, 18 engaging in the guides 11, the upper ends of the levers 4 have rollers 21 engaging in the guides 2 and the upper ends of the levers 5 are pivoted to shoes 24 which are slidable in the guides 2 and can be fixed in adjusted position, e.g. by lugs (26) on resilient levers (28) carried by the shoes 24, the lugs being selectively engageable in holes in the guides 2, Fig. 1 (not shown). The cam is carried by a shaft 35 rotatably mounted in brackets fixed to the guides 11 and is biased by a spring 45 against an adjusting screw 41. A shock absorber (61) acts on the lower ends of the levers 5.