baber/WOPTO huggingface dataset:
Patent GB-1348648-A (GB)
Title: Lasers
IPC: H01S3/20
Filed: 1971-05-14
Abstract: 1348648 Luminescent materials and uses thereof WESTERN ELECTRIC CO Inc 14 May 1971 [15 May 1970] 14950/71 Heading C4S [Also in Division H1] A dye laser active medium comprises at least two ingredients, one of which is excitable to produce a first lasing species and the other of which undergoes a chemical reaction when excited to form an exciplex lasing species, i.e. an excited complex, each of the two lasing species exceeding 10 mole per cent of the total excited material. One material may furnish both ingredients, part of the material remaining unreacted on excitation and the rest of the material forming the exciplex. The use of an active medium having two such species present in significant proportions allows a broad tuning range. It is preferred that the peak emissions of the two species are separated by at least 500 Š to increase the tuning range, as in Specification 1,348,647. The active medium may be a liquid or an amorphous solid, and in use is disposed in a cavity having a tuning reflector such as a rotatable diffraction grating, an acoustooptic grating, or an array of filters. Excitation may be by conventional optical pumping, or by particle excitation, field induced collision or chemical reaction. Exciplex formation.-The exciplex may be formed by any of the three methods described in Specification 1,348,647, but the reactant concentrations are chosen to prevent the reaction being complete. Thus a single laserable dye may provide both the first excited species and the exciplex species. A fourth method of forming exciplexes is also given, and depends on the dissociation of any aromatic compound having 1-5 aromatic rings and at least one -OH group on a ring, provided it does not have a nitro group or more than two halogen substituents. For the acceptor-donor method, some 20 mole per cent of an excitable ingredient is maintained; for excimer formation a dilute solution of 10<SP>-5</SP>-10<SP>-3</SP> M is used; for the protonation method the acidity is restricted, e.g. to 4-6 pH. For the dissociation method, base concentration is controlled. As an example of concentration control, the 4-methyl-umbelliferone of Specification 1,348,647 was made up as a 5 x 10<SP>-3</SP> M solution in ethanol, and acidified with 1 part in 30 of 0À1 M HCl. When pumped with a nitrogen laser the tuning range was from 3910 to 5670 A. Pumping devices are instanced, and may include optical and particle excitation, field induced collisions and chemical reactions.
Patent GB-1038715-A (GB)
Title: Improvements relating to stepping mechanisms
Inventor: ELLIOTT KENNETH FREDERICK
IPC: H01H51/08
Filed: 1962-11-23
Abstract: 1,038,715. Ratchet gearing. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Oct. 30, 1963 [Nov. 23, 1962], No. 14955/65. Divided out of 1,038,713. Heading F2Q. [Also in Division H2] A step-by-step mechanism for use in rotary switches comprises an internally toothed ratchet wheel 19 secured to a shaft 9, a pair of diametrically opposed pawls 20, 21 carried by segments 26, 27 freely mounted on the shaft 9, and a reciprocable actuating member 32 coupled to the segments by pins 30, 31. When the member 32 is moved in the direction X and Y segment 27 is rotated clockwise and its pawl 21 drives the ratchet wheel 19 whilst segment 26 is driven anticlockwise, its pawl 20 acting merely as a locking detent. On movement in the direction X<SP>1</SP> and Y<SP>1</SP> pawl 20 drives the ratchet wheel clockwise and pawl 21 acts as a detent. Over-travel is prevented by the cooperation of a sloping face 35 on each segment with one of the pawls. The member 32 may be carried by the pivoted armature of an electromagnet.
Patent GB-806637-A (GB)
Title: Improvements relating to apparatus for surface treating metal bodies in the presenceof a glow discharge
IPC: H01J37/32
Filed: 1955-05-24
Abstract: 806,637. Supply systems for space discharge vessels. DORTMUND-HORDER HUTTENUNION A.G. May 24, 1955 [June 16, 1954; April 25, 1955], No. 14969/55. Class 38 (4). In an apparatus for surface treating a metal body, not shown, in the presence of a glow discharge and comprising a vacuum vessel G constructed to receive the body and to one of whose two electrodes the body can be connected, the electrodes being furthermore connected in a circuit for the supply of direct current, the circuit includes in one embodiment a resistor R1 and a capacitor C connected in series and parallel respectively with the electrodes and the resistance and capacity of which are so selected that should the glow discharge between the electrodes break down to an arc discharge, the arc discharge is extinguished. In the other embodiment, to reduce energy loss in the resistor R1 the latter is of reduced resistance and an inductance L is serially connected in the circuit. An igniter device Z reignites the glow discharge and a resistor R2 of smaller resistance than R1 is serially connected between the capacitor and vessel. The direct current source S preferably is adjustable. Examples of circuit parameters are given in the Specification. Specifications 501,892 and 591,874, [Group XL], are referred to.
Patent GB-1381816-A (GB)
Title: Watch case formed  of sintered alloy material
IPC: C22C29/06
Filed: 1972-03-30
Abstract: 1381816 Watch cases DAINI SEIKOSHA KK 30 March 1972 [3 April 1971] 15042/72 Heading G3T [Also in Division C7] Watch cases having a wear-resistant golden colouration arc formed from sintered tantalum carbide alloys containing at least one of iron, cobalt or nickel to a total of 30%, and optionally up to 5% of one or more of molybdenum titanium, chromium, vanadium, niobium, tantalum, tungsten and zirconium. The materials should be sintered to a density of at least 88À7% of the theoretical density.
Patent GB-770096-A (GB)
Title: Improved arrangement for stacking of sheet metal plates
IPC: B65H29/70
Filed: 1955-05-25
Abstract: 770,096. Endless conveyers. UNGERER, F. May 25, 1955 [June 15, 1954], No. 15085/55. Class 78 (1). [Also in Group XVI] An arrangement for depositing single sheetmetal plates 2 which are moved in succession in their plane on a conveyer 1 comprises rollers 3, 4, 5 for curving the plates upwardly, and means acting on the edge of the plates to hold them in their curved state and to permit further movement to a point above a stack 19 where the plates are released. After the plates have been curved upwardly by the rollers 3, 4, 5 they are held in that state by rollers 6, acting on the edge of the plates, which pass then between belts 10 driven by belt drives disposed on table 24, and which are guided by guide rails 13 and pulleys 8, 9. The guide rails 13 together with the belts 10 are transversely adjustable on the table 24. Angular members 11 are fixed to the belts 10 to support the plates and the belts are held to the guides 13 by cooperation between parts 14 and 15 on the guides with the belts 10 and members 11 respectively. When a plate has been carried to a position above the stack 19, the guide 13 and the belts 10 are moved outwardly transversely so as to release the plate on to the stack which is lowered in accordance with the height of the pile. Rollers 22 are provided on the guides 13 to maintain the belts in tension when the guides 13 are withdrawn. Alternatively the tables 24 may be arranged to slide outwardly on the frame 23 so as to release the plates. In a further embodiment instead of belts 10, further rollers 6 may be provided on both sides of the path of the plates as far as the stack 19. The rollers 6 are mounted on the table 24 which is then withdrawn to effect release of the plates.
Patent GB-569006-A (GB)
Title: Improvements in and relating to dynamo-electric machines
IPC: H02K15/12
Filed: 1942-10-27
Abstract: 569,006. Dynamo-electric machines. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 27, 1942, No. 15095. Convention date, Oct. 30, 1941. [Class 35] The stator circuits of a machine having two- or multi-phase primary and secondary windings, e.g. an induction motor of the wound rotor type, are heated whilst the machine is inoperative by supplying thereto single phase heating current in such a manner that it flows in the same corresponding direction through all corresponding parts of the primary windings. As shown in Fig. 1, a switch 33-35 connects in parallel the phases of star-connected stator circuits 10-12 and heating current is supplied from the secondary winding 32 of a single phase transformer 31 connected to the common side of the switch and the neutral point 13 of circuits 10-12. The rotor circuits 18-20 are also star connected so that the e.m.fs. induced therein do not result in currents circulating through the slip rings, brushes and control resistances associated therewith. When the stator circuits are mesh connected, means are provided for connecting the single phase supply in series with the mesh, so that the heating current circulates around the latter. Induced current will circulate in a mesh connected rotor, but flow of current through the slip rings may be avoided by star connected control resistances.
Patent GB-742415-A (GB)
Title: Improvements in or relating to fireplaces
IPC: F24B13/02
Filed: 1953-05-30
Abstract: 742,415. Fireplaces. SMITH, W. H. May 31, 1954 [May 30, 1953], No. 15117/53. Addition to 732,546. Class 126. In a fireplace construction as described and claimed in the parent Specification the briquettes are mounted on a slabbed backing of cement their back faces being formed with keys for this purpose. As shown the briquettes 10 are formed with keys 11 for the slabbing material 12 and in a modification the modified briquettes with their slabbed backing are shown applied to a fireplace with a back boiler. If desired the slabbing 12 may extend through to the front face of the briquettes and round the top and bottom edges or perimeter of each one so as to prevent them from becoming loose or detached.
Patent GB-1245111-A (GB)
Title: Rotary piston pumps
Inventor: SADLER PETER
IPC: F04C18/332
Filed: 1968-03-29
Abstract: 1,245, 111. Rotary positive-displacement pumps. P. SADLER. March 18, 1969 [March 29, 1968], No.15187/68. Heading F1F. A two-stage vacuum-pump has an annular piston 91 with a vane 94 engaging slidably with a cylindrical swivel gland 95 adjacent an inlet tube 98, one end of the piston engaging with an accentric slot 92 in a rotary disc 93. A stationary piston 99 carries a spring-loaded vane 100 and is co-axial with an external driving-spindle (not shown) for the disc. Inlet passages 104 and transfer ports 105 are formed in the piston 91 and the vane 94. Two pumping spaces 102, 103 are thus formed and connected in series. An outlet port 106 is controlled by an oil-immersed non-return valve 107. In a second embodiment, Fig. 3 (not shown), the inlet passages communicate with the outer pumping space, outlet ports (124) communicate with the inner pumping space, and the vane 100 is replaced by one that is pivotally attached to the piston.
Patent GB-1034654-A (GB)
Title: Improvements in or relating to coating with beryllia
Inventor: LLOYD JAMES ELGIE
IPC: C04B41/81
Filed: 1962-04-19
Abstract: In a process for coating a body with beryllia obtained by the decomposition of the vapour of basic beryllium nitrate Be4O(NO3)6, either the vapour may be decomposed be heating, e.g. to 350-1400 DEG C. and the resulting beryllia deposited on the body, or the undecomposed vapour, e.g. below 300 DEG  C. may be absorbed on the surface of the body which is heated to a temperature above the decomposition temperature of the vapour, e.g. 350-1400 DEG  C.  The body may be of particulate UO2, fluidized by argon which acts as a carrier gas.  The basic beryllium nitrate may be prepared by heating above 150 DEG  C. in vacuo the addition compound Be(NO3)2.2N2O4 formed by the nolvolysis of BeCl2 in CH3COOC2H5/N2O4 mixtures.
Patent GB-708279-A (GB)
Title: Improvements relating to stands for bicycles and motorised bicycles
Inventor: SMITH WILLIAM BERNARD
IPC: B62H1/04
Filed: 1951-06-28
Abstract: 708,279. Cycle stands. MIDLAND GEAR CASE CO., Ltd. June 11, 1952 [June 28, 1951], No. 15322/51. Class 136(1) A cycle stand comprises brackets 6 secured to the chain stays 8, spring loaded legs 1 joined rigidly by a foot and pivoted to the brackets at 4, the legs or parts 13 carried by them being adapted to coact with abutments 15, 16 on the brackets when the legs are in the operative and inoperative positions respectively. The abutment 16 is of inverted hook form to hold the legs 1 both radially and sideways when the stand is in the inoperative position. Each bracket 6 has a boundary flange 7 to engage a chain stay 8. Bolt holes 9 are made in the bracket so that it may be clamped to the chain stay by a clamping strap 10.
Patent GB-1237253-A (GB)
Title: Vibratorily driven apparatus
Inventor: HURST MICHAEL JOHN
IPC: B02C17/14
Filed: 1968-03-30
Abstract: 1,237,253. Sieving apparatus. M. J. HURST. 23 June, 1969 [30 March, 1968], No. 15443/ 68. Heading B2H. [Also in Divisions B8 and F2] An apparatus such as a powder or ore shaker, ball mill, sieve or shaking table which in use requires to be vibrated, has its vibratory part (e.g. the sieve 10) mounted on a fixed frame through the intermediary of at least three fluid springs and a power driven eccentric weight 15, Fig. 4, is connected to it in such manner that a vertical axis through the centre of the vibratory part describes a cone of precession. The fluid springs 12 are air springs of the form shown at 30 in Fig. 4 and are inflatable through respective valves 21. The disposition in plan of four such springs 12 is shown in Fig. 1. Fig. 2 (not shown) depicts an elevation of the Fig. 1 apparatus and shows that the right-hand pair of springs 12 in Fig. 1 are at a lower level than the left-hand pair. Fig. 5 (not shown) depicts an alternative arrangement to that shown in Fig. 1: in this case there are only three fluid springs, disposed symmetrically in plan. Fig. 4 is an elevation of the Fig. 5 arrangement.
Patent GB-496403-A (GB)
Title: An improved hand truck or barrow
IPC: B62B1/18
Filed: 1937-06-04
Abstract: 496,403. Hand-trucks. HARTMAN, H. F. L. June 4, 1937, No. 15517. [Class 108 (i)] A hand-truck or barrow comprises a boxlike body supported by brackets 4 or leafsprings from a two-wheel axle 3, handles 6 extending rearwardly from the body, supporting legs 7, a detachable front wall 14 by means of which the contents may be emptied at the front of the truck when tilted, a sliding bottom 8 adapted to be drawn out from the rear end of the truck to empty the contents from the bottom, and a stop-bar 11 on the rear end of the bottom 8 arranged to limit the inward movement of the bottom so that the latter will not interfere with the movements of the wall 14. The bottom 8 is slidable between runners 9 fixed on the side walls 10 of the body and lower longitudinal frame members 1. The front wall 14 is held in place by turn-buttons &c.
Patent GB-438805-A (GB)
Title: Improvements in or relating to the production of photographic diazotype prints
IPC: G03C1/52
Filed: 1934-05-24
Abstract: 438,805. Photographic diazotype layers. LEUCH, W. P., and HARDING, Ltd., S. C. & P., Denmark Hill, London. May 24, 1934, No. 15563. [Class 98 (ii)] Diazotype papers are produced by coating a paper or cloth with a diazo compound, drying, and dusting over with a coupling component. An alkaline substance may be included with the coupling component. Development is effected by water or a solution of mild alkali such as sodium carbonate, borax, or disodium phosphate. A salt for preventing bleeding may be included in the developer. Moist ammonia gas with or without heat may also be used for development or the paper may be applied to a layer of gelatin containing developing substances. Examples of suitable papers are (1) paper coated with the stannic chloride double salt of 1-ethyl-amino-2-methyl- 4-diazobenzene chloride, aluminium sulphate, tartaric acid, and ammonium chloride and dusted over with a powder of phloroglucinol, sodium benzoate, and starch, and (2) paper coated with diazotized p-amino-diphenylamine sulphate, aluminium sulphate, and ammonium chloride dusted over with a powder of phloroglucinol, disodium phosphate, borax and starch. Specification 427,962 is referred to.
Patent GB-788279-A (GB)
Title: Improvements in or relating to electrical supply apparatus
IPC: H01B3/50
Filed: 1955-05-18
Abstract: 788,279. Converting. STANDARD TELEPHONES & CABLES, Ltd. May 18, 1956 [May 25, 1955], No. 15568/56. Class 38 (2). In a circuit converting between unidirectional voltages of different values, which comprises an interrupter such as transistor 1 fed from a battery connected to terminal 2, 3 and supplying a load 10 in parallel with smoothing condenser 9 through a transformer 5 and rectifier 8, the rise in volts occurring in the primary winding 4 of the transformer upon sudden reduction of the load is restricted by discharge of the energy in the transformer through a circuit including an extension 11 of winding 4, a rectifier 13 and the battery. Current flows round this latter circuit when voltage in winding 11 is such that terminal 12 becomes negative with respect to battery terminal 2. This condition arises when the load suddenly falls in value, but not when the oscillator is producing its normal sawtooth wave. Where two secondary windings exist, a further winding may be connected to winding 11, in series with a rectifier 13<SP>1</SP> and a buffer battery which absorbs excess energy.
Patent GB-258020-A (GB)
Title: Improvements in or relating to the manufacture of cellulose acetate
IPC: C08B3/06
Filed: 1925-06-17
Abstract: 258,020. Mallabar, H. J. June 17, 1925. Cellulose acetate; preparatory treatment of cellulose.-For the manufacture of cellulose acetate, the cellulose is preliminarily treated with a mixture of acetic acid and sulphuric acid, preferably in the cold; the sulphuric acid is then neutralized by the addition of a salt such as an alkali acetate; and the acetylation is then conducted in the absence of sulphuric acid, but preferably with the addition of a small quantity of zinc chloride and at a temperature between 20 and 40‹ C., preferably at 30-40‹ C. To obtain a product soluble in acetone water is added to the solution, which is maintained at 100‹ C. until the product shows the desired solubility.
Patent GB-110924-A (GB)
Title: Improvements in and relating to Wireless Telephone Systems.
IPC: H03C1/24
Filed: 1916-11-02
Abstract: 110,924. British Thomson - Houston Co., (General Electric Co.). Nov. 2, 1916. Vacuum tubes.-Relates to transmitting-apparatus for wireless telephony of the kind in which oscillations are produced by a vacuum-tube electron-discharge device, and consists in providing the vacuum-tube with two independent grids, one of which is connected in the high-frequency circuits, the other being connected to a circuit carrying currents of audible frequency such as a microphone circuit. As shown in Fig. 2 the transmitting-aerial 17 is coupled to the plate-filament circuit, which comprises the plate 7, coupling-coil 15, direct-current source 14 shunted by a condenser 20, and filament 2. The circuit of the main grid 4 and filament 2 includes an inductance 18, and the main grid is coupled to the plate by a variable condenser 19. The circuit of the auxiliary grid 11 and filament 2 is connected by a transformer 22 to a microphone circuit 21. In the construction of vacuum tube shown in Fig. 1 which is similar to that described in Specification 15788/14, the plate 7, auxiliary grid 11, and main grid 6 are duplicated, and arranged in symmetrical pairs on each side of the filament 2, which is preferably of tungsten. The auxiliary grid comprises wires 11 wound to and fro on a rectangular frame 10 so as to enclose the filament 2, and the main grid consists of wires 6 wound on two metal frames 5. The leads 3 for the filament and the lead 12 for the auxiliary grid enter at one side of the tube, and the lead 8 for the main grid enters at the opposite side, while the connectors 9 for the plates 7 enter at opposite ends of the tube.
Patent GB-1056295-A (GB)
Title: Device for loosening a vehicle tyre from its rim
IPC: B60C25/132
Filed: 1964-04-15
Abstract: 1,056,295. Tyre bead breakers. J. VILLARS. April 15, 1964 [April 24, 1963; April 9, 1964], No. 15700/64. Heading B7C. A tyre bead breaker comprises three clamping arms 2 and two wedges 7, each freely rotatable on a support 6, the peripheral edge of each wedge over part of its length spirally away from the rotatory axis and a portion of this edge part thickening as the radius increases (see Fig. 3, not shown). In operation, the smallest radius and thickness part of the wedge is inserted between tyre and rim and the wedge is driven by friction to rotate on relative rotation between the support 6 and the rim so as to penetrate progressively more deeply between tyre and rim and eventually separate them. The thickened wedge faces may be striated to improve the frictional contact. Each wedge is held on its support 6 by a spring and has stop means determining (a) the position in which the thinnest part is presented to the rim, and (b) the position giving maximum separation of tyre and rim.
Patent GB-977754-A (GB)
Title: Improved prosthetic valve for cardiac surgery
IPC: A61F2/24
Filed: 1963-04-22
Abstract: 977,754. Artificial heart valves. INSTITUTE OF MEDICAL SCIENCES. April 22, 1963 [April 23, 1962], No. 15811/63. Heading A5R. An artificial heart valve comprises a resilient deformable ring 17 and a plurality of deformable resilient cusps 10, 11, 12, one side 10a, 11a, 12a of each of which is secured to the ring and the other sides 15 of which normally engage corresponding sides of adjacent cusps to close the valve, the interengaging sides of the cusps being separable to open the valve by pressure on one side of the valve. The cusps and an outer band 18 of polyethylene glycol terephthalate mesh are moulded to the ring, the band being used for suturing the ring in the aortic annulus. The cusps are made of silicon rubber reinforced with polyethylene glycol terephthalate mesh.
Patent GB-407298-A (GB)
Title: Apparatus for permanent hair waving
IPC: A45D4/12
Filed: 1932-06-06
Abstract: 407,298. Hair - waving appliances. BARBARIN, A., 12, Rue St.-Louis, and DESRIAUX, R., 27, Rue du Vieillard, both in Bougie, Constantine, Algeria. June 6, 1932, No. 15923. Void [Abridged as open to inspection under Sect. 91 of the Acts, June 7, 1932]. [Class 131.] Hair-waving apparatus comprises two aluminium boxes G, I containing electric heaters L <1>, L respectively and adapted to be secured together, semi-cylindrical cavities B, adapted to receive a curler on which the hair is wound, being provided on the mating surfaces of the boxes. The boxes are covered with insulating material H and are provided with rubber packing at the joint and rubber insulating strips C on the sides adapted to contact with the scalp. The curler is of cast aluminium and is traversed by four holes parallel to its axis, the ends of which are square and engage in notches D provided in the end walls of the box I.
Patent GB-318274-A (GB)
Title: Process for the manufacture of phosphoric acid
IPC: C01B25/22
Filed: 1928-05-31
Abstract: 318,274. Carpmael, A., (I. G. Farbenindustrie Akt.-Ges.). May 31, 1928. Phosphoric acid.-In preparing phosphoric acid by treating phosphorite or like material containing calcium phosphate with sulphuric acid, the material is treated with an excess of concentrated sulphuric acid, the gypsum formed is removed, and the mixture of sulphuric and phosphoric acid is used repeatedly for the treatment of fresh material with intermediate separation of gypsum, until the sulphuric acid is used up.