baber/WOPTO huggingface dataset:
Patent GB-539596-A (GB)
Title: Arrangement of amplifier for producing negative admittance
IPC: H03D1/12
Filed: 1940-05-10
Abstract: 539,596. Thermionic valve circuits. STANDARD TELEPHONES & CABLES, Ltd. May 10, 1940. No. 8450. Convention date, June 30, 1939. [Class 40 (v)] A negative admittance is presented to an external circuit by arranging an amplifier with a bridge in parallel with the output with the input taken from across the opposite diagonal of the bridge and the external circuit constituting one of the arms of the bridge. Fig. 1 shows a diode detector 1 with a direct current load 3 having resistance 4 and condenser 5 in parallel to form the alternating. current load. The detector load with resistances N, P, Q forms a bridge with the input to amplifier t 1  across one diagonal and regenerative feedback applied to the other diagonal. In a modification Fig. 2 regenerative feedback is applied by a potentiometer formed by the detector load and resistance P<SP>1</SP> while a parallel potentiometer M<SP>1</SP>, N<SP>1</SP> gives regenerative feedback.
Patent GB-791746-A (GB)
Title: A combined vacuum cleaner and floor-treating tool
IPC: A47L11/206
Filed: 1956-03-19
Abstract: 791,746. Floor-polishing machines. LEWYT CORPORATION. March 19, 1956 [March 22, 1955], No. 8524/56. Class 138(1). [Also in Group XXVIII] A floor-brushing apparatus comprises a handle-propelled trolley 26, Fig. 1, having side plates 31, Fig. 4, a base plate beneath which are mounted brushes 44 and a partition 29 through and above which projects the driven member 37 of a clutch which is engaged by the bottom end 21 of a vertical motor-fan shaft 20 of a suction cleaner of the wheeled canister type when the latter is positioned on the trolley and is not performing a suction cleaning operation. The cleaner wheels 12 are clamped by straps 55, 60 to the trolley and the driven member 37 of the clutch is connected to the brush shaft 42 through known reduction gearing 38 ... 41. On mounting the cleaner casing 10, 11 the member 37 forces open spring-biassed flaps 22 which close an opening in the base of the cleaner during a normal suction cleaning operation. In a modification the flaps are replaced by a manually positioned rubber plug 63, Fig. 7, and the carrier comprises upper, middle and lower pans 72, 65, 67 secured together ; the middle pan 65 being recessed to provide ledges 74, Fig. 9 (not shown) on which the cleaner wheels 12 rest. The clutch 64 is of the self-centering dog-type and the driven part 76 is connected to the brush shaft 82 through reduction gearing 77, 78, 80 and 81. Specification 760,275 [Group XXVIII] is referred to.
Patent GB-234241-A (GB)
Title: Improvements in and relating to the steering heads of velocipedes
IPC: B62K21/18
Filed: 1924-04-04
Abstract: 234,241. Morris, G. L. April 4, 1924. Heads.-A steering- head for cycles &c., of the type adapted to prevent separation of the parts in the event of breakage, comprises, in combination with the lower bearing between the frame socket and the crown of the fork, an auxiliary bearing between the lower part of the socket and the crown, one element of which is carried by the socket and the other element of which is adjustably mounted in or on the top of the crown. In the construction shown an annular flange 7 on a sleeve 6 screwing on to or into the frame socket 1 is formed with lower and upper ball races, the former coacting with a ball race formed in the top of the crown 4 of the fork 5, and the latter with a ball race formed in a ring 8 screwing into or on to the top of the crown.
Patent GB-1177402-A (GB)
Title: Improvements in Tension Control Mechanism
Inventor: WASSON GEORGE F
IPC: G05D15/01
Filed: 1967-02-23
Abstract: 1,177,402. Straightening; tensioning. VOSS ENG. CO. 23 Feb., 1967, No. 8598/67. Heading B3E. [Also in Division G3] A predetermined relationship is maintained between the tensions in strip material being fed to and leaving a metallic strip material leveller by automatically controlling a motor drive for the leveller in dependence on displacements of driven guide rolls associated with the strip entering and leaving the leveller. In Fig. 3, metal strip unwound from a supply reel (not shown) is edge-trimmed to size and passes through guide or tensioning rolls to a final roll 28 before entering a levelling device 38 which flattens the strip. After leaving levelling device 38, the strip passes through further guide or tensioning rolls of which the first is roll 44, and is finally re-cciled on a take-up reel (not shown). Load cells 68, 72 are associated with the supports of reels 28, 44 so that electrical signals are produced corresponding to the strip tensions on either side of the levelling device and these tensions are maintained equal or in a predetermined relationship, automatically, by utilizing a signal comparison to control the voltage of a booster generator in series with the supply to an electric motor driving the levelling device. Separate uncontrolled motors drive the guide or tensioning rolls.
Patent GB-544250-A (GB)
Title: Improvements in and relating to electric wave transmission devices
IPC: H03F1/36
Filed: 1941-04-23
Abstract: 544,250. Valve amplifying circuits. TELE. PHONE MANUFACTURING CO., Ltd., and PADDLE, L. H. April 23, 1941, No. 8763/40. [Class 40 (v)] In a negative feedback amplifier the feedback path includes an input inductance and an output inductance with capacity coupling there between and a potentiometer connected between the high potential ends of the inductances so that the part of the feedback that will pass through the network will depend on the potentiometer setting so as to provide a variable frequency characteristic to the amplifier. Fig. 2 shows a four terminal network 9, 10, 11 shunted by potentiometer 14 to control the proportion of the feedback voltage traversing the network. The potentiometer may be controlled manually or by a pilot signal.
Patent GB-173181-A (GB)
Title: Cylinders for uniflow engines
IPC: F01B17/04
Filed: 1921-03-22
Abstract: 173,181. Romeyn, J. March 22, 1921. Cylinders.-In a uniflow steam-engine, the exhaust-steam belt c is provided with a series of strengthening-bolts a and transverse-ribs on one or both sides thereof, or the ribs d may surround the bolts and separate them from the steam space. In the former case, the bolt nuts are constructed as shown in Fig. 6, and engage washers e adjacent the belt.
Patent GB-1412334-A (GB)
Title: Air extraction or distribution systems
IPC: F24F7/00
Filed: 1973-02-22
Abstract: 1412334 Ventilation apparatus SOC D'ETUDES ET DE RECHERCHES DE VENTILATION ET D'AERAULIQUE 22 Feb 1973 [25 Feb 1972] 8785/73 Heading F4V A ventilation control system maintains constant the total amount of air fed to or withdrawn from a number of rooms and comprises a number of chambers 30 each having an air duct 23 for connection to a ventilation opening 26 in one of the rooms and a common chamber 28 having an air supply or extraction duct, not shown and communicating with each of the chambers by way of openings 29 some of which are closable by a closure 35 the arrangement being such that the sum of the passage areas of the closable openings remains substantially constant. The closure consists of a flexible band of resilient material which can be driven by a motor between the positions shown, the motor being controlled by limit switches. In another form (Fig. 4, not shown) the closure is a pivoted flap driven to close openings in one or other of the flat, parallel side walls of the mixing chamber.
Patent GB-1095479-A (GB)
IPC: B29C65/48
Filed: 1964-03-03
Abstract: 1,095,479. Laminates. METAL CONTAINERS Ltd. March 2, 1965 [March 3, 1964], No. 8966/64. Heading B5N. Laminates of thermoplastic films, e.g. of nylon, polyethylene terephthalate, polythene, polypropylene or polyvinylidene chloride, comprise at least two plies uniaxially oriented in directions which intersect in adjacent layers the plies being line- or spot-welded together and also weakly adhered together between the welds by material which may comprise a solution in toluene or xylene of low molecular weight (5000-10,000) polythene or of aluminium stearate or animal or vegetable oil. The welding may be effected by heat, ultrasonic action, or by applying a solvent for the film or a polymerizable adhesive. At least one of the plies may be formed with internal microscopic cracks or cavities, as by dispersing therein, before or after orientation, a volatile or gas-forming agent subsequently volatilized or dispersed. The laminate may comprise three films of which that in the centre is longitudinally oriented, the outer films being oriented oppositely at 60 degrees. In an example two crystalline highdensity polythenefilms, oppositely oriented at 60 degrees, have applied to them in stripes, as by printing rollers, a cooled 10% solution of 1000 M.W. polythene in hot toluene, and are subsequently laminated together between rollers by blowing toluene vapour on to them in quantity sufficient to dissolve the surface of the films between the stripes. The invention is stated to improve the tear-strength of the laminates and to provide heavy-duty products suitable for bags, tarpaulins &c.
Patent GB-875842-A (GB)
Title: Improvements in or relating to power-driven garden tools
IPC: A01D34/47
Filed: 1959-03-16
Abstract: 875,842. Agricultural implements, lawn mowers. AMBROSE, A. N. March 4, 1960 [March 16, 1959], No. 9052/59. Classes 6(1) and 6(2). A garden tool comprises a motor unit 12 provided with a power shaft 20 and two pins 22 which engage in tubes 42 of an implement 43, a squared end 21 of the shaft 20 engaging in a shaft 45 which drives cultivator blades 47. The engine unit may be removed and fixed to a lawnmower provided with tubes for engaging the pins 22 and a drive shaft for engaging the shaft 20. The engine unit may be connected to a rotating-scythe grass cutter or a reciprocating blade grass cutter. Specification 717,096 is referred to.
Patent GB-149384-A (GB)
Title: Improvements in and relating to mining machines
IPC: E21C31/00
Filed: 1919-04-10
Abstract: 149,384. Brantley, J. A. April 10, 1919. Endless-track vehicles.-A coal or like mining- machine comprises a body containing a motor and mounted on wheels in tractor belts with independent variable-speed driving and reversing gearing for the wheels. on each side. An electric, internal-combustion, or other motor 2 drives a transverse shaft 11, from which the drive-wheels 28, mounted on independent shafts, are separately driven, each through a gearing 12, 20, a shaft 22, and worm gearing 25, 26. The gears 20 comprise disks having several annular rows of holes adapted to be engaged by the gears 12, which consist of toothed disks held between fibre or paper friction sections on hubs, which are slid along the shafts 11 by rock-shafts 54 to vary the speed or direction of movement of the machine, or to turn the latter as on a pivot; the gears 20, which have ball thrust bearings, are depressed by means of rods 32 and links to permit lateral movement of the gears 12. The driving-wheels 28 are connected to rear wheels 50 by tractor belts 51.
Patent GB-817012-A (GB)
Title: Improvements in liquefied gas storage vessels
Inventor: MONROE ADAM GREGORY
IPC: F17C13/00
Filed: 1956-03-23
Abstract: 817,012. Storing liquefied gases. BRITISH OXYGEN CO. Ltd. March 25, 1957 [March 23, 1956], No. 9133/56. Class 8(2). A metal e.g. steel, liquefied gas storage container 10, 11 has an inner heat insulating lining 14 in direct contact with the gas. Suitable closed pore materials include foamed glass, expanded phenol or urea formaldehyde, expanded polyvinyl chloride and balsa wood. Suitable porous materials include expanded slag wool and rock wool preferably having an inner coating of heat insulating material e.g. bonded asbestos or glass cloth. The container is formed of hermispheres welded together at flanges 12, 13 and supported by a ring 22 and legs 23. The lower hemisphere 11 has a drain cock 16.
Patent GB-743119-A (GB)
Title: Improvements in or relating to roller mills, roller and breast mills or other apparatus incorporating co-operating pressure members between which substances are passed for grinding, crushing, comminuting or like purposes
Inventor: BALFOUR PETER STEPHEN ANDREW
IPC: B02C4/32
Filed: 1951-04-20
Abstract: 743,119. Reciprocating pumps. HOLMES BROS. PAINT MACHINERY, Ltd. July 21, 1952 [April 20, 1951]. No. 9253/51. Class 102(1). [Also in Group XXIX] A pump comprises a power-operated piston 13 controlling an inlet port 9 and a spring- loaded piston 17 controlling a delivery port 10 and a relief port 11 through a passage 32 and grove 33. The piston 17 has a collar 17a and on the delivery stroke has a short free movement until it engages an abutment 21 loaded by an adjustable spring 18. During the downward movement, the collar 17a first engages an abutment 30 loaded by a light spring 31 and may move downwards, until the abutment 30 engages the stop 7b, to reduce the depression in the pump cylinder. The delivery 6 is connected to hydraulic loading jacks of machine rolls, if the pressure in the delivery 6 is at the predetermined value, then no liquid will flow, but if the pressure is higher, then when the delivery port opens, liquid will flow into the pumping space and press back the piston 17 and pass through the port 9 when it is next uncovered by the piston 13 ; at higher pressures, the piston 17 is raised to uncover the relief port 11. Specification 743,113, [Group XXIX], is referred to.
Patent GB-725360-A (GB)
Title: Multiple centrifugal dust separator
IPC: B04C5/20
Filed: 1953-04-02
Abstract: 725,360. Centrifugal separators. METALLGES. AKT.-GES. April 2, 1953 [April 9, 1952; Aug. 20, 1952], No. 9266/53. Class 23. In a multi-cell separator having cells with axial inlets and cleaned gas outlets at the inlet ends of the cells, the gas outlets are bent or branched to discharge through the walls of the cells or through the partition separating the gas to be cleaned from the cleaned gas. As shown in Figs. 1, 3 bent gas outlets 3 and branched gas outlets 3<SP>1</SP> discharge through the inlet portions 6 of the cells to the gas outlet duct which is separated from the gas inlet duct by a partition 5 formed by the inlet portions 6. Pairs of rows of cells discharge into dust tubes 8 leading to a screw conveyer (not shown). In the construction shown in Fig. 6, the dust from rows of cells is discharged into divergent dust tubes 8<SP>1</SP> and the gas is removed by a fan 13. The dust outlet ends of the cells may be fitted with flanges as shown in Fig. 13 in which spaced groups of cells and plates 5<SP>1</SP>, 29 form a gas outlet passage 11. In an alternative construction the plate 5<SP>1</SP>, 29 are dispensed with and the flanges 5, 28 of the cells may be extended to form the gas outlet passage. In the separator shown in Fig. 19, dust settling in the cleaned gas collecting chamber slides down the partition 8<SP>1</SP> formed by the flanges of the cells to discharge at 34, the dust and gas separated in the cells discharging at 10, 12 respectively. In the heat exchanger and separator shown in Fig. 22 the gas ouetls 3 are bent to extend to the dust outlet ends of the cells 1 and partitions 5, 51 form a passage for the fluid to be heated by the hot gas cleaned in the cells.
Patent GB-213768-A (GB)
Title: Improvements in or relating to connections for joining together cards in card index systems
IPC: B42F19/00
Filed: 1923-04-04
Abstract: 213,768. Whitby, J. M. F. April 4, 1923. Sheets and cards.- Cards of index systems are joined by connections comprising each parts a, b, preferably 8-shaped, and made of thin flexible material, the parts being coupled by a fine wire or loop c. The inner faces of the parts are solutioned, and the loop may be made continuous or with a break.
Patent GB-609940-A (GB)
Title: Improvements in or relating to copolymers of vinyl chloride
IPC: C08F214/06
Filed: 1946-03-26
Abstract: Copolymers of vinyl chloride and a diester of citraconic or mesaconic acid are prepared by subjecting the monomers, containing more than 50 per cent by weight of vinyl chloride, to the action of heat and/or a polymerisation catalyst and/or actinic light.  A third component, e.g. vinylidene chloride or acrylonitrile may be present.  Suitable esters are those of lower alkyl alcohols and of cyclic alcohols, e.g. cyclohexyl or benzyl alcohol.  The process may be effected in a mutual solvent such as methanol or in aqueous emulsion having a pH between 5 and 8.5.  Specified emulsifying agents include gelatine and a mixture of the sodium salts of sulphated cetyl or stearyl alcohols and the free alcohols. Suitable catalysts are per-salts or organic peroxides to which may be added reducing agents such as ferrous sulphate or sodium sulphite.  The copolymers may be precipitated by an electrolyte, e.g. aluminium sulphate.  Only a part of the vinyl chloride, which copolymerises at a faster rate than the diesters, need be present initially and the rest then added at intervals during the process. Temperatures of between 30 DEG  and 50 DEG  C. are preferred and the products can be pressed into clear, pliable sheets without the aid of plasticisers.  Specification 497,175 and U.S.A. Specification 1,945,307 are referred to.
Patent GB-472060-A (GB)
Title: Improvements relating to locking arrangements for drawers or the like of articles of furniture
IPC: E05B65/462
Filed: 1936-03-30
Abstract: 472,060. Drawer &c. fastenings. ANGUS & CO. SCOTLAND, Ltd., W., and HOWE, A. L. March 30, 1936, No. 9317. [Class 44] In fastening means for securing a number cf drawers under the control of one of the drawers, release is effected by pushing the control drawer inwards from its normal locking position. The invention is described as applied to fastening the pedestal drawers 2 of a desk under control of a central drawer 1 above the usual knee space Fastening is effected by a vertically sliding bar 4 having pins 5 adapted to engage in recesses in members 6 secured to the inner ends of drawers 2 In the fastening position a pin 8 on the bar 4 rests in a recess 9 in drawer 1. When drawer 1, which may have a key-lock, is pushed in, pin 8 rides out of the recess, raising bar 4 and freeing drawers 2. As shown, release may also be effected by pulling drawer 1 out in the usual way. The inner end of drawer 1 has an incline 10 allowing the drawer to be pushed in after being fully open. Members 6 have inclines 11 allowing drawers 2 to be closed whilst drawer 1 is in locking position. A form is described in which drawer 1 is without recess 9 but has an incline such as 10, the drawer being so short that its inner end is normally clear of pin 8. Raising bar 4 may be effected by other means such as an inclined link 12, Fig. 8, which assumes a vertical position when drawer 1 is pushed in. Instead of forming recess 9 and incline 10 on the drawer, they may be provided on a separate slide member, Fig. 6, having pin- and-slot connection with the drawer. This construction allows the drawer to be pushed in to release drawers 2 and then returned to its normal position leaving the drawers 2 free.
Patent GB-165933-A (GB)
Title: Improvements in or relating to baths, coppers and like washing vessels
IPC: D06F39/00
Filed: 1920-03-31
Abstract: 165,933. Jackson, F. J. March 31, 1920. Wash-tubs.-Telescoping section 2, 3 of a bath are movable horizontally into a fixed section which may be heated by a gas burner or by a fire. The end section is moved by means of a detachable carriage 7. In the closed position the receptacle forms a boiler or vessel suitable for washing clothes. Reference has been directed by the Comptroller to Specifications 20884/91 and 15396/10, [both in Class 26, Closets &c.].
Patent GB-303130-A (GB)
Title: Improvements in or relating to the construction of shipping cases
IPC: B65D5/32
Filed: 1928-03-28
Abstract: 303,130. Bliss, H. R. Dec. 30, 1927, [Convention date]. Knock - down cases formed from special blanks.-A shipping case is formed from three blanks, one constituting the bottom 1, two side walls 2 and two end closing flaps 5 and the other two each constituting an end wall 7 and an end closing flap 11, the end walls being provided with central vertical creases 12 and the bottom with a central crease 6 so that when the end walls are stapled to the side walls the box may be collapsed for transport; when the box is to be used the bottom is stapled to the end walls. The end walls or the bottom and side walls have flanges by which the walls are secured together, or flanges may be provided on all the walls.
Patent GB-343788-A (GB)
Title: Improved apparatus for yarn clearing
IPC: B65H63/06
Filed: 1930-03-24
Abstract: 343,788. Yarn-clearing apparatus. VILT, L. C. J., 68, Rue de Turenne, Lille, Nord, France. March 24, 1930, No. 9427. Convention date, May 11, 1929. [Class 120 (ii).] An adjustable yarn-clearing aperture of square shape is provided by means of a tapered slit 4 in a plate 1 on which slides a second plate 9 carrying two jaws 10, 11, the distance between which is caused to vary as the plate 9 moves by means of an arm 12 pivoted at 14 and having a pin 13 engaging in an inclined slot 15 in the plate 1. A guide-roller 17 and a grooved guide-bar 21 are also carried by the plate 9, a shank 18 passing through an aperture 3 in the plate 1. The apparatus is secured in any desired position by a nut.
Patent GB-721672-A (GB)
Title: Improvements in flexible hose connections
IPC: F16L35/00
Filed: 1951-04-24
Abstract: 721,672. Pipe joints. DUNLOP RUBBER CO., Ltd., and BULMER, C. G. March 10, 1952. [April 24, 1951] No. 9462/51. Class 99 (1). In hose end connections wherein the end of a hose pipe 1 is gripped between an insert 2 and a sleeve 3 forming part of a coupling member 4, a sheath 3 of rubber or rubber-like material, other than a fire-resisting material, is fitted tightly around the sleeve and the adjacent part of the hose. The sheath is preferably twice the length of the sleeve and its wall thickness about one-sixteenth of an inch.
Patent GB-107802-A (GB)
Title: Improvements in Revolution-direction Indicators and Counters.
Inventor: KELLY THOMAS
IPC: G01P13/04
Filed: 1916-07-10
Abstract: 107,802. Kelly, T. July 10, 1916. Revolution-direction indicators wherein electric contacts are rotated from the main shaft through one-way clutches to energize revolution-direction indicators and counters. Two such devices are provided, one of which is always stationary. An intermediate shaft a<1> driven by chain gearing from the main shaft has mounted thereon two disks b<1>, b<1> carrying oppositely directed pawls b<2>, b<2'> engaging corresponding ratchet teeth on sprocket wheels b<3>, b<3'>. Driven from these wheels by ehain gearing are sprocket wheels c<1>, c<1'> loose on shafts D, D<1> and formed with oppositely directed teeth which drive, through pawls c<3>, c<3'>, wheels c<2>, c<2'> secured to the shafts D, D<1>. Pawls E, E<1>, carried by the bearings of the shafts, are provided positively to prevent accidental rotation of the shafts in the reverse direction. Brushes f<2>, f<2'>, mounted respectively on the shafts D, D<1>, energize through contacts f<3>, f<3'> counting devices I, I<1> which are provided with hands showing the direction of revolution and connected by gearing to indicate the number of revolutions. Zeorizing-devices may be provided for the counter hands.