baber/WOPTO huggingface dataset:
Patent GB-708299-A (GB)
Title: High-stability d.c. amplifier circuit arrangement
Inventor: STARKS-FIELD ALFRED BENJAMIN
IPC: H03F3/36
Filed: 1951-09-20
Abstract: 708,299. Valve amplifying circuits. MARCONIS WIRELESS TELEGRAPH CO., Ltd. May 19, 1952 [Sept. 20, 1951], No. 22099/51. Class 40 (6) In a D.C. amplifier comprising a balanced pair of valves VI, 2 with a common cathode resistance CR12, D.C. coupled to a succeeding two-stage amplifier V3, 4, the D.C. to be amplified being applied to one valve V1 of the balanced pair and feedback being applied to the other valve V2 from the cathode circuit of the output valve V4, the cathode of the first valve V3 of the two-stage amplifier is connected to the tapping point of a potentiometer comprising resistances R10, 11 connected across the H.T. supply. In this way the amplifier, which can be adjusted by adjustment of the feedback between valves V2, 4 to be insensitive to change in heater voltage, is also rendered insensitive to changes in the H.T. potential.
Patent GB-295832-A (GB)
Title: Improvements in or relating to chisels
IPC: B25D3/00
Filed: 1927-08-23
Abstract: 295,832. Stables, G. Aug. 23, 1927. Chisels.-In a mason's chisel of the kind provided with a bifurcated holder for receiving renewable cutter bits the bit 1 is held in the bifurcated holder 2 by a wedge &c. 3 driven in behind the bit to act as a support therefor. The bit and opening in the holder may be of taper formation and the base of the opening slightly inclined corresponding to the taper of the wedge. The bit is detached by removing the wedge and tapping the bit down in the opening which allows it to be removed sideways. In the modification shown in Fig. 3, the holder 2 and wedge 3 are formed with registering slots 4, 5 so that a pointed tool may be driven in under the bit for forcing it forwardly out of the grip of the holder.
Patent GB-1037696-A (GB)
Title: Improvements in or relating to pressure control valves
IPC: G05D16/10
Filed: 1963-06-04
Abstract: 1,037,696. Valves. DANFOSS A.S. June 4, 1963 [June 5, 1962], No. 22219/63. Heading F2V. A pressure control valve comprises a cylindrical housing 1 having an inlet port 3, an outlet port 2 and a relief port 4. A piston 5 is loaded by a spring 7 and is provided with an annular recess to form a passageway 10 between the piston and cylinder. The piston may also be provided with a portion 6 to close the port 2. The inlet pressure acts on the piston face 11 to open the valve to allow flow to the outlet 2 and when the pressure reaches a predetermined value, the end 12 of the passageway 10 allows flow to the relief port 4. With a further increase in pressure, the piston moves to reduce the length of the throttle passage 10. The passage 10 may be formed by a groove in the cylinder or by axial grooves in the piston or cylinder.
Patent GB-692044-A (GB)
Title: Improvements in or relating to domestic appliances for use in drying and airing clothes towels and the like
IPC: D06F57/04
Filed: 1950-09-08
Abstract: 692,044. Clothes airer; tripod stands. NEWMAN, A., and HOGGAN, E. F. A. Sept. 10, 1951 [Sept. 8, 1950], No. 22228/50. Classes 52(iii) and 52(v) A clothes airer comprises a central tube 11 with a short length of metal rod 12 at its lower end, three supporting legs 15 being pivotably mounted in channels 14 in the rod 12. The legs have a small straight portion 21 to lie flat against the rod in their extended position and. are then bent cutwardly. A locking ring 22 covers the straight portions 21 and holds the legs against further extension. When the legs are folded parallel to the tube 11 a flange 25 on the locking ring engages the bevelled edges of the legs, the ring being held in position by a spring 26. Arms 37 supported by a slotted cap member 13 in their supporting position are collapsed within the tube 11. The arms 37 have projections 41 bent out from the metal to prevent their complete withdrawal when moved to the supporting position.
Patent GB-1037287-A (GB)
Title: Hot gas generating installation
Inventor: MARCHAL RAYMOND HIPPOLYTE FIRM
IPC: F23C15/00
Filed: 1963-06-05
Abstract: 1,037,287. Generating combustion products under pressure. SOC. NATIONALE D'ETUDE ET DE CONSTRUCTION DE MOTEURS D'AVIATION. June 5, 1963 [June 9, 1962], No. 22278/63. Heading F1L. A combustion gas generator comprises tubular combustion chambers 8, 18, 25 in flow series surrounded by gas-tight chambers 4, 5. Chamber 8 is of the oscillating column type, supplied with fuel and air through inlets 13, 14 respectively. Combustion gas pulses are discharged through nozzle 10 into diverging duct 16 leading to combustion chamber 18 to ignite a mixture of fuel supplied through injectors 21 and compressed air induced through inlet 15 from chamber 4. Combustion occurs in chamber 18 without affecting the combustion frequency in chamber 8. Resulting gas pulses are discharged through nozzle 19 into a similar combustion chamber 25 receiving fuel and additional oxygen through inlets 28, 29 respectively. Discharge nozzle 27 may be of non- circular section. The pulse frequency is determined by the size of combustion chamber 8 and the pressures at which fuel and combustion supporting medium are supplied thereto. Relative dimensions of the combustion chambers are given. A readily ionisable substance, such as potassium, may be injected into one of the combustion chambers for electrical power generation purposes.
Patent GB-735036-A (GB)
Title: Improvements in or relating to textile drawing frames
IPC: D01H5/50
Filed: 1951-09-24
Abstract: 735,036. Drawing frames. S.K.F. KUGELLAGERFABRIKEN GES., [formerly VEREINIGTE KUGELLAGERFABRIKEN GES.]. Sept. 24, 1951 [Sept. 23, 1950], No. 22336/51. Class 120(2). A textile drawing frame comprises a top roller carrier 1 which is capable of being raised out of its operative position by being swung about a bracket 51 between the top roller carrier 1 and the underframe of the drawing frame and has means provided for locating the top roller carrier when in its operative position and when raised out of its operative position, and a spring-pressed lever 67 pivoted in the carrier which determines the setting of a middle pair of top drafting rollers by engagement of the nose 55 with one of the recesses 14 and which is arranged so that when the carrier 1 is raised out of its operative position and when adjustment of the middle pair of rollers is required, a protuberance 64 on the lever can be forced against a stop pin 65 on the bracket whereby the pressure of loading spring 7 on the lever 67 is overcome to withdraw the lever from its roller setting position. With the arrangement shown in Fig. 1, the carrier is maintained in its operative position by the engagement of a sliding locking member 60, which is urged by spring 62, and a tooth 61 on the bracket 51. In the raised inoperative position of the carrier 1 the protuberance 64 on lever 67 engages with a spring 63. The carrier 1 is pivoted to the bracket 51 by a shaft 53 which can be provided with eccentric portions 59 to permit fine adjustment of the carrier 1 relative to the lower rollers. Alternatively this fine adjustment can be achieved by making the bracket 51 adjustable on its support bar 2, e.g., with the arrangement shown in Fig. 4 the bar 2 has a flat side 91 against which two screws 80 are made to bear to press the bar against the bracket 51. In another embodiment packing pieces are used to achieve this adjustment. Alternative means for the locking of the carrier 1 are shown in Fig. 5 which consist of a U-shaped pawl 68 hinged on a pin 73 so that it straddles the carrier. Instead of pin 73 a curved part of the carrier may be used as hinge and a leaf type spring used to press the pawl against this curved part. A screw may be provided in the central portion of the pawl 68 to bear against a depression in the carrier 1 so as to provide a fine adjustment for the pawl. Also in the embodiment shown in Fig. 5 the carrier is maintained in its raised position by a spring 75 fastened to the rear end of the carrier so as to engage a stepped portion 76. In moving the carrier the spring 75 bears against the curved surface 79 and produces a frictional drag which prevents the carrier from slamming down once it has been released from the step 76.
Patent GB-724243-A (GB)
Title: Drain-closure means for lavatory wash basins, baths, sinks and the like
IPC: A47K1/14
Filed: 1952-09-05
Abstract: 724,243. Waste plugs for baths &c. FLUX, N. T., GITTINGS, E. W., and THOMPSON, R. H. July 22, 1953. [Sept. 5, 1952] No. 22345/52. Class 26. A stopper assembly for baths, sinks, washbasins and the like comprises a closure member, a stem extending from its under side and insertible through the drain-pipe grid and means on the stem insertible through the grid thereafter to effect a non-detachable engagement between the stem and the grid. As shown in Fig. 1, the stem c of the stopper a carries a ball f capable of passing through the grid e, and a bush d which is then inserted in the grid hole and expanded to secure it by an upward pull on the stem. As shown in Fig. 5, two stems c are provided, one of which carries a pivoted pawl g which after passing through the grid falls, and engages in a notch h in the second stem when the stopper is lifted. According to the Provisional Specification two or more pawls may be fitted, which may be spring actuated to effect engagement.
Patent GB-591094-A (GB)
Title: Improvements in rotary wing aircraft
IPC: B64C27/54
Filed: 1945-08-30
Abstract: 591,094. Rotary wing aircraft. BRIE, R. A. C. Aug. 30, 1945, No. 22347. [Class 4] The blades of a rotary-wing aircraft are each provided with a retractable picketing eye, to enable them to be secured to the aircraft structure when the machine is parked. As shown in Fig. 1 the eye 16 is attached to a weight 14 so as to be moved into the retracted position by centrifugal force when the blade rotates, and is returned to the extended position, upon the blade speed being reduced, by springs 15. Alternatively, the eye may be actuated by a single or double acting solenoid mounted inside the rotor blade. The eye is shaped in such a way that it conforms to the blade profile when in the retracted position. The blades 28, Fig. 8, may be picketed by guy wires 30 incorporating springs 31 at their lower ends engaged with eyes on the undercarriage struts 29, and lengths of stiff rod 34 at their upper ends engaged with openings 18 in the eyes 16. The rods 34 enable the guys to be engaged with the picketing eyes without using ladders or platforms.
Patent GB-1526914-A (GB)
Title: System for rate immunonephelometric analysis
IPC: G01N21/82
Filed: 1977-05-27
Abstract: In the processes for nephelometric analysis of a sample containing an antigen or an antibody to be assayed, by the antigen/antibody reaction, where the concentration of antigen or of antibody is determined from the maximum rate of variation of the nephelometric signal as a function of time, a source of error lies in the uncertainty of carrying out the measurement under conditions of excess antigen or antibody. This uncertainty is removed by using characteristics of the curve of the maximum rate of variation of the nephelometric signal as a function of the time required to achieve this maximum rate.
Patent GB-724032-A (GB)
Title: Improvements in or relating to the production of polymers
IPC: C08F24/00
Filed: 1952-09-05
Abstract: The bulk polymerization of dioxolanes having one or more semi-cyclic double linkages is catalized with an addition compound of a polar solvent and a hydrohalide acid salt of a metal of the second or fourth group of the periodic table.  Suitable catalysts are methyl or ethyl alcohol solutions of zinc, mercuric, cadmium and stannous chlorides.  Examples describe the polymerization of (1) propene (1)-diol-(2,3)-cyclohexylidene acetal; (2) propene-(1)-diol-(2,3)-cyclopentylidene acetal; (3) and (4) cyclohexane dione-(1,4)-bis-[propene-(1)-diol(2,3)-acetal] dissolved in the acetal of (1); (5) 1,4-bis-[2,21-(4-methylene-1,3-dioxolyl]-butane or the di-[propene-(1)-diol-(2,3)-acetal] of adipic dialdehyde; (6) and (9) bis-2,21-(4-methylene-dioxolane); (7) a mixture of cyclohexanone-propane-(1)-diol-(2,3)-ketal and (6); (8) a mixture of cyclohexane-dione-1,4-bis-[propene-(1)-diol-(2,3)-ketal] and (6). Other dioxolanes mentioned are 4-methylene-, 2-propyl-4-methylene-, 2 - vinyl - 4 - methylene -, 2 - phenyl - 4 - methylene- and 4 - methylene - 5 - methyl - 1,3-di - oxolanes, propene-(1) - diol - (2,3) - methylcyclohexylidene acetal, 2 - methyl - 4 - methylene - 1,3 - dioxolane - 2 - acetic acid ethyl ester, 1,2 - and 1,3 - bis - [propene - (1) - diol - (2,3) - acetal], the di - [propene - (1) - diol - (2,3) - acetal] of malonaldehyde, succinaldehyde and glutaraldehyde.  The polymerization may be carried out by dropwise addition of the catalyst at room temperature, the temperature rising to 38 DEG  to 40 DEG  C., which is maintained for 8 to 12 hours, followed by heating at 60 DEG  C. for 1 to 2 hours.  The products are compatible with nitro-ceullose and may be used for moulding and in lacquers. Specification 620,842 is referred to.
Patent GB-360428-A (GB)
Title: Improvements in electrical follow-up systems for precision instruments such as gyroscopic compasses
IPC: H03F3/02
Filed: 1930-07-26
Abstract: 360,428. Gyroscopic apparatus. SPERRY GYROSCOPE CO., Inc., Manhattan Bridge Plaza, Brooklyn, New York, U.S.A.-(Assignees of Wittkuhns, B. ; 5, Garden Place, Chatham, New Jersey, and Watkins, F. M. ; 191, Puritan Avenue, Forest Hills, New York, both in U.S.A.) July 26, 1930, No. 22587. Convention date, July 27, 1929. [Class 97 (iii).] An arrangement for controlling a motor driving the follow-up element of a gyroscopic apparatus comprises a transformer having a pair of normally balanced opposed secondary windings 9, 10 mounted on a core part 2 carried by the spider gear 4 of the follow-up element and co-operating with a movable core part 1 carried by the sensitive element 5. The arrangement is such that displacement of the latter from the neutral position indicated causes a resultant secondary voltage, having a phase relationship to the current in the primary winding 8 dependent on the direction of movement, to be applied to the grid of the first valve of an amplifier system the output from which feeds one winding of a motor driving the follow-up system. The arrangement is adapted to produce a sluggish non-hunting system. Preferably, a controllable amount of hunting is introduced.
Patent GB-491351-A (GB)
Title: Manufacture of benzyl-oxyalkyl and hydroxyalkyl ethers of cinchona alkaloids
Filed: 1937-08-19
Abstract: Cinchona alkaloids containing a phenolic hydroxyl group are converted by treatment with a benzyloxyalkyl aromatic sulphonate into their benzyloxyalkyl ethers, from which the hydroxyalkyl ethers may be obtained by hydrolysis with dilute acid.  The benzyloxyalkyl ethers may also be prepared by digesting a chloralkyl ether of the alkaloid with sodium benzylate.  The products possess therapeutic properties. The benzyloxyalkyl aromatic sulphonates are prepared by the process described in Specification 491,349.  Examples are given of the preparation of (1) benzyloxyethyl apocupreine by alkylation of apocupreine with benzyloxyethyl benzene sulphonate or benzyloxyethyl p-toluene sulphonate; also by alkylation of apocupreine with b -chlorethyl p-toluene sulphonate, followed by digestion of the b -chlorethyl product with sodium benzylate; (2) benzyloxyethyl hydrocupreine by treatment of the potassium salt of hydrocupreine with benzyloxyethyl p-toluene sulphonate; (3) g -benzyloxypropyl apocupreine and a -methyl-b -benzyloxyethyl apocupreine by interaction of potassium apocupreine with g -benzyloxypropyl- and a -methyl-b -benzyloxyethyl p-toluene sulphonates respectively. Further examples describe the hydrolysis of the products of the preceding examples with dilute hydrochloric acid, thereby forming hydroxyethyl apocupreine, hydroxyethyl hydrocupreine, g -hydroxypropyl apocupreine and a -methyl-b -hydroxyethyl apocupreine.  British Specification 461,373 and U.S.A. Specification 2,033,514 also are referred to.  The sample furnished under Sect. 2 (5) comprises hydroxyethyl hydrocupreidine dihydrochloride, prepared by treating potassium hydrocupreidine with benzyloxyethyl benzene sulphonate and heating the resulting benzyl oxyethyl hydrocupreidine with dilute hydrochloric acid.
Patent GB-661446-A (GB)
Title: Improvements in or relating to photographic film apparatus such as a camera or optical projection apparatus
IPC: G03B23/12
Filed: 1949-09-02
Abstract: 661,446. Photographic apparatus. KODAK, Ltd. Sept. 2, 1949 [Sept. 10, 1948], No. 22845/49. Classes 97 (i) and 98 (i). A photographic roll film camera or projector of the type comprising a supply chamber adjacent an exposure frame and containing a support for a film spool, a take-up chamber at the opposite side of the exposure frame from the supply chamber, and means for rotating the spool to feed the film or re-wind the film on to the spool is characterized in that it is provided with a movable film presser member mounted adjacent the film spool support and spring- urged to a position such that when a film spool having end flanges with beads projecting towards one another so that the distance therebetween is less than the film width is on the support, the presser member extends across the bead on one of the flanges to hold an area of film out of contact with said bead when the spool support is. rotated in the unwinding direction. The projector shown comprises a body portion 1 having supply chamber, containing a support 17 for a spool having flanges 26 with a bead 27 on each thereof, and a take-up chamber 4 in which the film is coiled after passing through an exposure frame 3 provided with a spring-urged pressure-plate 9. Engaging one marginal area of the film on the spool is a lever 32, pivotally mounted on a stud 30 and urged anti-clockwise by a spring 34, the movement of lever 32 in that direction being limited by a pin 33. When the film is being unwound from the spool by rotation of a knurled knob 22 secured to the support 17, the lever 32 has the position shown in Fig. 1, but is rotated clockwise against the action of spring 34 when the film is re-wound on to the spool from the take-up chamber 4. In another form, the film presser member is a U-shaped rod having an aperture in each limb through which passes a stud 30 having a length equal to that of the spool, this rod being spring-urged like lever 32. The member may also take the form of a plate slidably mounted on a block. Specifications 557,061 and 558,516 are referred to.
Patent GB-265915-A (GB)
Title: Means for fastening bags of all kinds
IPC: A45C13/06
Filed: 1926-09-16
Abstract: 265,915. Zeindlhofer, A., Zeindlhofer, A., and Zeindlhofer, E., (trading as Nagel, Hanusch, & Co.). Feb. 15, 1926, [Convention date]. Fastenings for handbags. - The frame for the mouth of the bag comprising two members 1, 2 hinged together at 3, 4 has a sliding member 7 movable along one half of a track member 8 carried by member 2. Inturned portions 9, 10 of member 7 embrace the edges of the track 8, a plate-spring 13 may be interposed between members 7, 8 to give frictional sliding grip, and a stop is provided to prevent movement of member 7 past the centre of the track. The member 1 has a longitudinally extending portion 5 which terminates at A to leave a gap at one end, through which a down-turned portion 11 of member 7 is adapted to pass when member 7 is placed at that end and the bag closed. The portion 11 engages the edge of the portion 5 to hold the bag closed when member 7 is moved towards its central position. A modification is described in which member 7 is divided into two parts which are moved apart to pass through corresponding gaps at the ends of member 5, and moved into contiguity at the central position to hold the bag closed.
Patent GB-738712-A (GB)
Title: Improvements in or relating to a profile milling cutter
IPC: B23C5/24
Filed: 1953-08-19
Abstract: 738,712. Milling-cutters. SCHONDORFF, A., [trading as HEGENSCHEIDT KOMMGES., W.]. Aug. 19, 1953 [Aug. 19, 1952], No. 22860/53. Class 83 (3). A profile milling cutter for cutting the tyre contours of wheel sets comprises elongated steel cutters 25 of square cross-section and with square-cut cutting-edges for machining the straight and convex profiles, and a ring cutter or cutters 15 for the concave profiles. The identical square-section blades are adjusted radially by screws 44 and are positioned against stop-pieces 36 in the cutter body. They are clamped by cylindrical flattened wedges 39 and screws 40. Lathe &c. centres; tailstocks.-The cutter body 27 is mounted in a spindle 30 by a bolt 29 and is supported by a rotary hollow-centre 32 in a tailstock 34 adjusted axially by bolts 33.
Patent GB-591546-A (GB)
Title: Improvements in or relating to solvent emulsion cleaning compositions
Filed: 1944-11-17
Abstract: A solvent emulsion cleansing composition comprises a resin acid-fatty acid mixture such as tallol, an alkyl - mono - or poly - amine or alkano - lamine, such as triethanolamine concentrated potash or equivalent alkali solution, an alkyl ether of ethylene glycol or diethylene glycol such as ethylene glycol mono butyl ether, and pine oil in specified proportions.  The other amines specified comprise amylamines, ethylene diamine, monoethylamine, diethylamine, morpholine, amines formed from nitroparaffins, butylamines, di-2-ethylhexylamine, tetraethylene-pentamine, propylenediamine and diethylthanolamine.  The other alkalies specified comprise caustic soda, soda ash, and ammonia.  The other ethers specified comprise diethylene glycol mono butyl ether, diethylene glycol monoethyl ether, and diethylene glycol monomethyl ether.  The composition may be diluted with a hydrocarbon or a chlorinated hydrocarbon; kerosene, chlorinated benzene, and o-dichlorobenzene are specified.  The soiled articles are cleaned by first dipping in the composition, diluted or not, and then rinsing in water or dilute alkaline solution.  The water or dilute alkaline emulsions may be prepared first and used as such.  Specification 491,960 is referred to.