baber/WOPTO huggingface dataset:
Patent GB-1353564-A (GB)
Title: Control devices of rotorcrafts
IPC: B64C27/54
Filed: 1972-03-30
Abstract: 1353564 Pitch control in helicopters KAWASAKI JUKOGYO KK 30 March 1972 [6 April 1971] 15222/72 Headings B7W and B7G In a control system for variable pitch blades 56 of an aircraft rotor, wherein cyclic and collective pitch control is effected by means of a swashplate 50, at least cyclic pitch is controlled by means of a link mechanism including a fulcrum 103, Fig. 2, whose position is changed according to the airspeed of the aircraft; this link mechanism is located at (a), Fig. 1. As cyclic pitch control stick 10 is moved to induce a pitching movement rods 20, 40 cause levers 104, 109 to.turn, moving rods 120, 140 which tilt the swashplate. The lever 104 tilts about the fulcrum 103, a pin engaging a slot 105, which is moved to the left by servomotor 101 as airspeed increases, while the lever 109 turns about a fixed fulcrum 110. Thus the amount of longitudinal control produced by a given stick movement is decreased as airspeed increases. At the same time the amount of lateral control, caused by tilting of the swashplate by rod 130, moved by the turning of lever 108 pivoted to an end of the lever 104, is increased; when the aircraft has zero speed the pin 103 is over the point of attachment 111 of the lever 108, Fig. 3a (not shown), so that that lever is not turned. Also, when the pin 103 is to the left the rod 120 moves less than the rod 140 so that the centre of the swashplate moves vertically and the collective pitch is changed. On the other hand, when the stick 10 is moved so as to effect lateral control by moving rod 30, the lever 108 turns about point 111 and the amount of lateral control is independent of airspeed. Collective pitch is controlled by stick 31 which moves the rods 20, 30, 40 equally; when the pin 103 is to the right this produces equal movements in the rods 120, 130, 140, but when it is displaced to the left the rods 120, 130 will move differently so that as collective pitch is changed by means of stick 31 the longitudinal and lateral cyclic pitch control is affected, to an extent increasing with the airspeed. Alternatively the link mechanism of Fig. 2 may be located at (b), Fig. 1, in which case collective pitch is not affected. The pin 103 may be returned to the right by a spring (113), Fig. 6a (not shown) in the event of servo failure, or the servo may be duplicated, Fig. 6b (not shown).
Patent GB-775883-A (GB)
Title: Improvements in viscose process and products produced thereby
IPC: D01F2/10
Filed: 1954-05-24
Abstract: To viscose containing cellulose of relatively uniform chain length and of 300 to 800 D.P. there is added at least 0.1 per cent of a copolymer of ethylene oxide and propylene oxide represented by the formula <FORM:0775883/IV(a)/1> in which the average values of x and y are 6-106 and 19-28 respectively, and the viscose is spun into an acid saline regenerating bath containing at least 6 per cent, preferably 6-12 per cent, of a zinc salt, preferably zinc sulphate, or a chemically equivalent proportion of another salt, preferably a sulphate, having the same effect on filament formation as the zinc salt.  Preferably, the spin bath contains 9-10 per cent of sulphuric acid and is at 45-70 DEG  C., and the filaments are stretched from 70 to about 200 and even up to 1000 per cent in the bath.  In addition to the copolymer, the viscose may contain a small proportion of an amine, such as dimethyl- or cyclohexyl-amine, or of dimethylformamide, or these compounds may be added to the spin bath. The cellulose and caustic soda contents of the viscose may be 4-13 and 5-13 per cent respectively and its salt index may be 6-20.  In an example, viscose containing 7.5 per cent of cellulose, 6.5 per cent of sodium hydroxide, and 0.5 per cent of a copolymer in which x is 16 and y is 28, and having a sodium chloride index of 15, is spun into a coagulating bath at 58 DEG  C. containing 9.5 per cent of sulphuric acid, 20 per cent of sodium sulphate, 9 per cent of zinc sulphate and 1 per cent of dimethylformamide, and the extruded filaments are stretched 250 per cent in the bath over a 200 inch path of travel. The filaments have high tensile strength and are suitable for use in the manufacture of tyre cord. Specification 735,481 is referred to.
Patent GB-569817-A (GB)
Title: Screwthread locking devices
IPC: F16B39/10
Filed: 1943-09-16
Abstract: 569,817. Locking nuts, &c. CHUBB, D. S. Sept. 16, 1943, No. 15231. [Class 89 (i)] A deformable washer for gripping a bolt &c. thread on screwing up and consequent flattening is initially a running fit on the thread with the wall of the hole parallel to the axis of the thread; the washer and nut are interlocked to prevent relative rotation. The washer may be coned as at 2 in Fig. 1, and be formed as a socket fitting the nut over a part of its polygonal surface or may be concaved as at 3 and extend over the full width of the nut as shown in dotted lines. In the latter case the thickness of the washer is such as to bring the exterior of the combined nut and washer up to the next convenient standard spanner size. The thickness should be at least one and a half times the thread pitch. Slits or slots extend from the inner edge part way across the washer to increase flexibility. As applied to an anchor nut the washer is shaped to fit the casing 11 which is cut away at 12 to permit replacement of the washer without removal of the casing. The nut may be counterbored at 6 so that the recess formed breaks through the flats of the nut to pass projections 7 on the washer. The projection 7 may be of pointed formation. In a modification larger washers are employed with triangular holes punched in to receive the projections left at the corners of the counterbored nuts. The nut and washer may be permanently assembled by making the hole a push fit for the projections or by burring the projections over.
Patent GB-822390-A (GB)
Title: Joining of submerged structures
IPC: E02D25/00
Filed: 1957-05-14
Abstract: 822,390. Joining submerged structures. CHRISTIANI & NIELSEN. May 14, 1957 [Sept. 11, 1956], No. 15302/57. Class 68(2) Apparatus for clamping together the adjacent edges 3, 4 of two submerged structures 1, 2 comprises hooks 9 each of which is hinged to a tension rod 10 extending through a watertight bearing 13 in an end wall 7 of the structure 2 and carries, inside the structure, a cross beam 11 which bears against two hydraulic jacks 12. Each hook 9 is connected by a link 14 with a double acting jack 15. Eye lugs 18, to correspond with the hooks 9, are cast into an opposing end wall 6 of the structure 1 and are provided with washers 19 and nuts 20. During the lowering of the structures to the bottom each hook 9 is held in a retracted position by its associated jack 15. When the structures have been placed next to each other the jacks 15 are operated to lower the hooks 9 for engagement with the eye lugs 18. Hydraulic pressure is then applied to the jacks 12 so that the ends 3, 4 are drawn together.
Patent GB-834473-A (GB)
Title: Magnetic core memory arrays
IPC: G11C7/02
Filed: 1957-05-15
Abstract: 834,473. Magnetic information-storage apparatus. NATIONAL CASH REGISTER CO. May 15, 1957 [June 18, 1956], No. 15374/57. Class 40 (9). A magnetic core memory array comprises a stack of circular non-magnetic discs R1-R8, Fig. 3, each of which is provided with a like number of shouldered openings 32, Fig. 4, accommodating the toroidal cores 28a of the array, the discs being mounted on a common spindle and arranged so that they may be rotated relatively to each other. The rotatable discs facilitate threading of the X and Y coordinate driving leads 17, 19 and the sensing and inhibit leads 18, 20 through the cores, the wiring process involving threading the leads 17 and 19 through vertical columns of openings; rotating each disc relatively to the adjacent discs through an angle alpha corresponding to the angle between adjacent openings, threading the leads 18 and 20 through the new vertical columns of openings, and finally setting each disc back through an angle alpha/2 relative to its neighbour so that only alternate openings form vertical columns and the X and Y leads 17, 19 are physically positioned at right angles to each other. This stage of assembly is shown in part-sectional form in Fig. 16. The angular alignment of the discs during the various stages of wiring is controlled by a locating rod 37 which is passed in turn through a hole a, b, c in each disc, these holes being arranged as shown in Fig. 7. Each disc may be formed of acrylic plastic, and on its reverse face, Fig. 5, has an integral boss 31 providing spaces between the stack of discs for accommodating wiring which lies in the plane of the discs during or after assembly. The cores are secured in the disc openings by a retaining sheet of tissue paper 34, Fig. 4, which is glued to the upper surface. The array assembly is completed by discs of insulation material 25, 26 having terminals 44, 45 to which the array leads are soldered, the assembly being clamped up by an axial bolt 27.
Patent GB-529453-A (GB)
Title: Improvements in and relating to gas-blast circuit breakers
IPC: H01H33/16
Filed: 1939-05-24
Abstract: 529,453. Gas-blast switches; arc-rupturing in switches. AKT.-GES. BROWN, BOVERIE, & CIE. May 24, 1939, No. 15395. Convention date, May 27, 1938. Drawings to Specification. [Class 38 (v)] Relates to a nozzle-contact, air-blast switch in which a protective resistance bridging the contacts is switched-in by an auxiliary spark gap in parallel to the contacts, the gap being arranged in the air-outflow passage such that the sparkover voltage is smaller than that of the contacts in the blow-out position, whereby reignition of the arc at the contacts due to recurring voltage of steep wave-front is prevented. Consists in that for extinguishing the arc at the gap itself, the downstream-electrode of which is tubular, means are provided which produce in the blast chamber behind the narrowest cross-section of the nozzlecontact an accumulation of the pressure of the compressed air which brings about the blow-out, through the tubular spark-gap electrode, of the arc at the spark gap. The invention is described and illustrated in a form which is substantially the same as that of Specification 509,955.
Patent GB-496942-A (GB)
Title: Improvements in and relating to the production of active carbon
IPC: C01B32/336
Filed: 1937-06-03
Abstract: Vegetable charcoal, such as that obtained from wood, nut shells, fruit stones and the like, is initially activated by heating to a temperature of at least 700 DEG  C. and subjecting it to the action of a mixture of air and steam containing between 5 and 20 per cent by volume of air.  The activating gases are preferably superheated to at least to 350 DEG  C., e.g. between 400-500 DEG  C.  The charcoal may lose between 25-50 per cent by weight during the activation.
Patent GB-588663-A (GB)
Title: Flow measuring device
IPC: G01F1/22
Filed: 1944-08-14
Abstract: 588,663. Vertical tube flowmeters. FISCHER & PORTER CO. Aug. 14, 1944, No. 15501. Convention date, Aug. 13, 1943. [Class 69 (i)] Means for measuring the rate-of-flow of a fiuid comprise a pair of standard flanged pipe elements adapted for vertical flow of fluid therethrough, a flanged metering tube disposed vertically within said pipe elements, the flange of said tube being connected in a fluid-tight manner between the flanges of said pipe elements, a metering float having a flowconstricting head within said tube, and means connected to one of said pipe elements by which the position of the head may be read. In the form shown in Fig. 1, the flanged metering tube 10, with a plurality of flutes 13 giving a byepass of. upwardly-increasing cross-sectional area for the float 36, is bolted between the pipe-lines 14 and 15, having an inlet 20 and an outlet 21. To the flange 28 of the tee 15 an adaptor plate 26 is bolted, attached to a plug 31 through which is connected a visual extension 35 (Fig. 4) composed of plates 41 and 42, between which is placed a plate 46, so that all openings in the plates coincide. A threaded socket 48 in the plate 46 engages with the plug 31, and aligns with lower and upper openings 49 in the plate 46, and between the tightly-bolted plates 41, 42 and 46, glass windows 51 are placed. Within the chamber so formed, the position of the upper end of the rod 38, attached to the flowconstricting head 37, can be observed on a scale, the float 36 being denser than the fluid and resting against a flange 40 when there is no flow. The metering tube may have a downwardly-tapered bore with a spider at the bottom to guide the rod. In the form shown in Fig. 5, fluid moves upwardly through tees 14 and 15 connected to pipe-lines 64 and 66 by elbows 67 and 68, the visual extension 35 being inverted and the tee 15 being covered by a plate 22. The openings 20 or/and 21 can be connected directly to horizontal pipelines ; also, the outlet 66 can be connected to the upper flange of the tee 14. In further modifications, the metering tube is placed wholly in the lower or upper pipe element, so that the co-operating upper or lower pipe element may be curved. With a metering tube giving downward increase of cross-section and traversed by an upwardly-opening float, downward flow may be measured, the float being less dense than the fluid, spring-loaded or counterbalanced to be at the top of the metering tube when there is no flow. Specifications 579,779 and 579.796 are referred to. The Specification as open to inspection under Sect. 91. comprises also the subject-matter of Specification 588,705. This does not appear in the Specification as accepted.
Patent GB-124672-A (GB)
Title: Improvements in Eyeleting Apparatus.
Inventor: CHANCE THOMAS
IPC: A43D100/02
Filed: 1918-09-24
Abstract: 124,672. Chance, T. Sept. 24, 1918. Setting eyelets.-An eyeleting-machine is provided with a slotted sliding plate B which can be moved by the handle A into the two positions shown in Figs. 3 and 4. When the plate is in the position shown in Fig. 4, and the punches P are lowered, they are moved sufficiently to position the eyelets in the work, their motion being stopped by the abutment of the shoulders G against the sides 5 of the slot in the plate B. The plate B is then moved into the position shown in Fig. 3, when the punches can be lowered farther, passing through the wider parts T of the slot in the plate B, and clinching the eyelets.
Patent GB-1499103-A (GB)
Title: Tunnelling machines
IPC: E21D9/10
Filed: 1974-04-08
Abstract: 1499103 Tunnelling machines INDUSTRY SECRETARY OF STATE FOR 3 April 1975 [8 April 1974] 15541/74 Heading E1F A tunnelling machine comprises a cutting head 1, means 17 for rotating the head about an axis and impact cutting tools 5 driven by reciprocating hydraulic motors and mounted on the head in an arrangement which is symmetrical about said axis and which comprises at least a first and a second set of cutting tool units, the units of the first set being located at a first common radial distance from the axis and the units of the second set being located at a second common radial distance from the axis, the second set comprising units which are circumferentially offset from the units of the first set. Preferably the units of the first set are offset by 45‹ from units of the second set, the head is oscillated about its axis of rotation through an angle of at least 90‹, and the outermost cutting tools are inclined forwardly and outwardly from the axis of rotation of the head to cut a clearance for the head. At least one spoil removal channel may be provided through the head or along the outer wall of the head, such channels preferably having a spiral configuration about the axis of rotation of the head. The cutting tool units are preferably of the type disclosed in the referred to Specification 1480903.
Patent GB-222805-A (GB)
Title: Improvements in drum and cymbal beaters
IPC: G10D13/00
Filed: 1924-06-28
Abstract: 222,805. Danly, R. C. June 28, 1924. Cymbals; drums .-A cymbal is supported on a drum and cymbal beating apparatus in such a way as to be returned by gravity into the path of the cymbal beater after having been turned therefrom by auxiliary pedal means. The drum and cymbal beating apparatus is of known type, having a clip for attachment to the hoop of the drum and comprising beater heads 7, 10 carried on the drum-stick 8 secured to a shaft 5 which is rocked in one direction by a pedal 3 and link 6, being returned by a spring 9. Lateral movement o[ the operator's foot rocks a cranked shaft 19, Figs. 3 and 7, by depressing an arm 20, the shaft 19 being connected by a lever 23 and rod 26 to a pin 18 which projects through slots in a socket 12 and is secured to a stem 16. The stem 16, which carries the cymbal 17 by an offset bracket 17<1>, is thereby turned in the socket 12 to put the cymbal out of action, the cymbal returning by gravity on release of the auxiliary pedal 20. In the modification shown in Fig. 10, the pedal 3 is mounted on two pivots at right angles to one another, lateral rocking of the pedal about pivot 31 operating a lever 33, corresponding to the lever 23, Fig. 7, through a depending lug 32. The socket 12 carrying the cymbal-supporting stem 16 may be secured in different angular positions by a clamping screw 15.
Patent GB-119566-A (GB)
Title: Improvements in and relating to Artificial Feet and Legs.
Inventor: WYLLIE JAMES
IPC: A61F2/60
Filed: 1917-10-26
Abstract: 119,566. Wyllie, J. Oct. 26, 1917. Limbs, artificial.- A foot and leg are connected by a cylindrical piece of rubber d which is secured to the re- "pective parts and constitutes an ankle joint. The rubber ankle is received in a taper socket c in the tubular leg casing and is retained by pins c, while the lower end thereof is clamped in a serrated cylindrical hole g formed in the two parts of a divided foot, which parts are secured together by bolts p, p<1>. A tendon comprising a chain h and rubber buffer i is employed to assist the ankle. The forward movement of the leg is limited by a a rubber buffer k. The toe piece is connected to the heel of the foot by a rubber block e and a strip n of balata belting. The gap between the foot and leg is surrounded by a leather band.
Patent GB-181603-A (GB)
Title: Plate lifting mechanism for rolling machines
IPC: B21B39/04
Filed: 1921-06-06
Abstract: 181,603. McCabe, T. June 6, 1921. Rolling.-A metal-plate rolling mill is provided with plate lifters which can be brought into action after each pass to raise the plate from the table behind the rolls into a position wherefrom the operator can draw it forward over the top roll ready for passing through the mill again. For this purpose a hand or foot lever 45, 46 is operated to put a disengaging clutch 34 under the control of a cam 38 into action, thereby coupling a constantly-running shaft 30 to a shaft H which drives a cam shaft 8 through a chain drive 9. Cams on the shaft 8 oscillate rocking members I, G carrying single and double racks respectively. The members I act to collapse the lifters D into a vertical position by means of linkages 12 and gearing 15, and the members G then act to pull down the lifter carriers E into the position shown in Fig. 1 by means of the levers 2, 3. The return of the members I now raises the lifters into the horizontal position under the plate resting on the table C, and the return of the members G then lifts the carriers to the delivery position, the eccentric mounting y of the levers 3 being provided to tilt the plate forward. The supports F at one side of the mill are adjustable to provide for plates of different widths.
Patent GB-327053-A (GB)
Title: Improvements in or relating to fireplaces
IPC: F24B1/198
Filed: 1929-05-18
Abstract: 327,053. Thynne, Ltd., H. & G., and Price, J. F. May 18, 1929. Open fireplaces. -A faience surround for an open fireplace is formed with a plurality of lugs c at the back, having slots d in which engage metal keys or dowels e, the free ends of which are embedded in cement, and which in the form shown are of L-shape.
Patent GB-782060-A (GB)
Title: Improvements in or relating to the preparation of anhydrous hydrazine
IPC: C01B21/16
Filed: 1955-05-31
Abstract: In the production of anhydrous hydrazine by ammonolysing anhydrous dihydrazine sulphate, as described in Specification 703,150, to produce a suspension of solid ammonium sulphate in a solution of hydrazine in ammonia, filtering to remove ammonium sulphate, and distilling the filtrate to separate ammonia and anhydrous hydrazine, the ammonium sulphate is dissolved in an aqueous solution of hydrazine to produce an aqueous solution containing dihydrazine sulphate and ammonia, which is distilled to recover the ammonia and aqueous dihydrazine sulphate.  Aqueous dihydrazine sulphate is dehydrated by heat and vacuum, and treated with anhydrous ammonia gas while a substantial part of the sulphate is in fused state, or may be maintained in the liquid phase by solution in hydrazine.  Excess anhydrous liquid ammonia is added at the end of the reaction.  The resulting suspension is filtered and the filter cake washed with liquid ammonia.  The filtrate and washings are distilled in a column under pressure to recover overhead the majority of the anhydrous ammonia, which is recycled to the ammonolysis step.  The bottoms are passed to an atmospheric fractionator to recover the remainder of the ammonia and anhydrous hydrazine.  The ammonium sulphate filter cake is treated with 2-60 per cent aqueous hydrazine solution at 20-100 DEG  C., until it is all dissolved, and the resulting solution is distilled under pressure to drive off the ammonia, which is returned to the ammonolysis step, and leave aqueous dihydrazine sulphate which is returned for ammonolysis after dehydration.
Patent GB-353591-A (GB)
Title: Improvements in and relating to systems for indicating or repeating the movement of a member electrically
IPC: G01R13/00
Filed: 1930-05-21
Abstract: 353,591. Electric signalling systems. WARREN, T. R., Beechwood, Gaskell Road, Altrincham, Cheshire, and ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Bush House, Aldwych, London. May 21, 1930, No. 15692. [Class 40 (i).] The movements of a member, e.g. an electricity meter, are indicated or repeated through the intermediary of a photo-electric cell, the illumination of which is controlled by a shutter operated by the member and a second shutter adapted to follow the movements of the primary shutter. As shown in Fig. 1, the master pointer 1 moving over a scale 11 carries a shutter 2 having a recess 3 in the vertical edge, and being adapted to co-operate with a pair of shutters 4, 4<1> mounted on the pointer 6 of a follower instrument and having recesses 5, 51 which together with the recess 3 control the illumination of the photo-electric cell 9 by the light source 8. Between the cell 9 and the shutters is located a lens system 10 and a shield 12 having a divergent aperture 13 which allows the width of the aperture between the shutters to remain constant over the whole range of movement whilst providing variable illumination according to the extent of movement. The photo-electric cell 9 is connected to the grid of an amplifying valve 17, Fig. 2, the anode 21 of which supplies repeating instruments 23 and the following instrument 7 which may be of the moving coil type. When the primary pointer 1 alters its position the intensity of illumination of the cell 9 is changed and the current in the follower instrument 7 is varied to cause the pointer 6 to follow the pointer 1 until the aperture between the shutters is adjusted to an extent such that the illumination of the cell is sufficient to maintain the follower shutter in its new position. The shield 12 may be dispensed with if desired and a single shutter 4 may be employed. Modified amplifying arrangements employing two stages, Figs. 3, 4 and 5 (not shown), may be employed. Moreover alternating-current amplification may be employed, the light source being interrupted at constant frequency, e.g. by the use of a neon lamp supplied with alternating current.