baber/WOPTO huggingface dataset:
Patent GB-712724-A (GB)
Title: Improvements in or relating to a process for preparing potassium nitrate
IPC: C01D9/04
Filed: 1952-07-08
Abstract: In a cyclic process for the production of potassium nitrate by the reaction of nitric acid on potassium chloride, the reactants are added to a residual solution from previous operations, potassium nitrate formed is crystallized and removed so as to leave a mother liquor having a concentration of hydrogen ions at least equal to the sum of the concentration of potassium and chlorine ions therein and at most 1.3 times as great as the concentration of chlorine ions therein, and the mother liquor is distilled under reduced pressure to remove hydrochloric acid therefrom to leave a residual solution for subsequent operations. If impurities are introduced with the reactants, a portion of the reaction liquid may be removed after potassium nitrate separation and the loss of reactants compensated. The final temperature of crystallization of the potassium nitrate is preferably above -20 DEG  C. and desirably between -10 and +10 DEG C., a saturated solution of potassium chloride remaining after separation of the nitrate. The distillation, preferably with rectification, may be carried out at below 75 DEG  C. at pressures below 100 mm. of mercury to avoid the formation of nitrosyl chloride and chlorine, and is preferably effected in two columns, the first having bottom and top temperatures of 52 and 45 DEG  C. and the second, 60 and 55 DEG  C.  The distillation is preferably carried out to such an extent that potassium chloride does not crystalline out. The reaction of potassium chloride and nitric acid may be effected under such conditions that the potassium nitrate crystallizes out on undissolved potassium chloride but this is not preferred and a temperature of 75 DEG  C. for this reaction is therefore not exceeded and 50 DEG  C. is preferred.
Patent GB-569314-A (GB)
Title: Improvements in means for feeding measured quantities of a liquid
IPC: G05D7/00
Filed: 1943-10-20
Abstract: 569,314. Liquid-fuel burners. ROWLANDSON, E. S. Oct. 20, 1943. No. 17220. [Class 75 (i)] [Also in Group XXIX] Liquid is supplied at a measured rate to burners, emulsifying apparatus, &c., through a large bore pipe fitted with a means to limit the maximum flow and a manually or automatically adjusted weir. Fig. 1 shows a liquid fuel tank 1 communicating with a chamber 2 in which the level is controlled by float-operated valve 6 and from which the fuel can pass through a pipe 9 to a hollow block 10 fitted with a manually adjustable perforated screw weir plug 11 discharging into a cup 19 connected to the burner. The block 10 is adjustably supported on a bracket 16. The plug 11 may be fitted with a removable needle 21 to ensure the fuel being delivered in a thin stream Or globules. Fig. 3 shows a manually adjustable weir plug 23 fitted in a hollow block 22 at the end of the pipe 9. The block 22 carries a roller 26 engaged by a wedge block 27 operated by an expansible rod 29 subjected' to the heat of the combustion chamber and slidable on a fixed bracket 28. Alternatively a thermostatic bar in the combustion chamber may raise and lower the weir plug or operate a weir plate arranged in front of the weir plug.
Patent GB-333974-A (GB)
Title: Improvements in and connected with the separation or settlement from sewage and other liquids, of matters held in suspension therein
IPC: B01D21/00
Filed: 1929-06-05
Abstract: 333,974. Coombs, J. A., and Activated Sludge, Ltd. June 5, 1929. Gravity-separation apparatus.- Matter deposited on the floor of a settling tank is swept or moved centrifugally into pits or sumps provided beyond the edge of the floor. Sewage or other liquid is supplied to the tank 1, Fig. 6, through a central vertical pipe 12 which delivers into a container 12<x>, which is closed at the bottom and directs the liquid upwards into a cylindrical casing 13, from which it passes downwards and is distributed to flow outwardly through the tank, so that solid matter settles on the floor, the clear liquid overflowing into a circumferential effluent trough 9. The settled solid matter is moved from the floor, which is preferably inclined, by rotary sweepers or scrapers 3 and pushed into sumps 7, which may be arranged circumferentially around a circular tank or situated in the corners of a rectangular one. The flow of liquid to the channel 9 may be regulated by means of a vertical cylindrical perforated baffle 20. The liquid is initially supplied to either end of a hollow cross-beam 25 and passes thence to the pipe 12. The arms carrying the scrapers have wheels 16 travelling' on a rail 4 and their inner ends are hinged to the container 12x which is carried by a shaft 14, rotated in bearings in the cross-beam 25 by a motor 27 and worm gearing 26. In the form shown a central sump 32 is provided, the solid matter settling therein being directed to an outlet pipe 34 by scrapers on a frame 13. Vanes or blades 28 which give a rotational movement to the liquid may be provided within the casing 13, these being fixed either to the casing or to the container 12x. Sludge collecting in the sumps 7 may be raised by air lifts to an annular discharge channel 11. The upper edge of the baffle or partition 20 may be formed as an overflow trough similar to and connected with the trough 9. In an arrangement shown in Fig. 1, a rectangular tank is provided with branch overflow troughs 9<x> extending diagonally over the sumps 7 at the corners and communicating with the trough 9. A modification is described in which an annular channel is provided between the sumps 7 at the edge of the floor and additional sweeping devices at the end of the rotary scraper arms push the matter collecting in the channels into the sump.
Patent GB-581546-A (GB)
Title: Improvements in bearings
IPC: F16C17/10
Filed: 1944-09-11
Abstract: 581,546. Bearings. CLERK, R. C. Sept. 11, 1944, No. 17339. [Class 12 (i)] A bearing with two relatively rotatable members respectively having inner and outer bearing surfaces between which is a floating ring rotating relatively to both such bearing surfaces, one at least of which surfaces increases in diameter in the axial direction, has means for resiliently urging in the axial direction the member which has such bearing surface of increasing diameter towards the floating ring so as to eliminate play in the bearing. Fig. 1 shows a bearing mainly for thrust and location, Fig. 8 shows a self-aligning journal bearing, and Fig. 9 shows a mounting for a bevel gear shaft which includes two singlethrust conical bearings oppositely arranged. The floating ring may be a graphite filled phenolic resin with a fibre filling or may be of aluminium, bronze, graphite-filled porous bronze, gun.metal, steel, operating between dissimilar metal bearing surfaces. As shown in Fig. 1 the floating ring 24 is of diamond shape and is received in V grooves 23, 21 formed in the inner and outer bearing members 22, 20. These grooves are formed between a sloping face of the main body 25 or 33 of the bearing member 20 or 22 and a sloping face of an axially slidable ring-like member 27 or 35 mounted on the main member 20 or 22 and urged by springs 30 or 38 towards the sloping face thereof; the telescoping parts are keyed as at 31 to rotate together. With equal spring thrusts on the sliding members of the two bearing members the upper apex angle a should be made less than the lower apex angle b so as to equalize wear. The floating ring may have a small radial flange nipped between the telescoping parts, Figs. 2, 4, 7 (not shown). The self-aligning bearing shown in Fig. 8 has two separate floating rings 96, 97 which co-operate with the conical bearing faces 94, 95 of the inner bearing member 93 and with the spherical faces 98, 99 of the two-part outer bearing member 100-101 the two parts of which are urged axially together by compression springs 102, 103 acting on the heads of tie rods 104. In the conical bearings shown in Fig. 9 the apex angle of the inner bearing surface 111 or 118 is smaller than that of the outer bearing surface 107 or 117.
Patent GB-829942-A (GB)
Title: Liquid oxygen system including valves for controlling fluid flow
IPC: F16K24/02
Filed: 1956-03-05
Abstract: 829,942. Valves.BENDIX AVIATION CORPORATION. March 5, 1956 [March 15, 1955], No. 17353/59. Divided out of 829,941. Class 135. In a liquid supply system having a supply tank adapted to be filled with liquid oxygen and to deliver gaseous oxygen to a utilization circuit, a valve is arranged for connecting an opening communicating with the tank either with a vent outlet opening to atmosphere or with a distribution outlet connected to the circuit. The valve comprises a body 1 with an inlet 2 communicating with the oxygen tank, a vent outlet 25 and an outlet 8 leading to the utilization circuit. A pair of valve heads 12, 14 are mounted on a stem 11. The stem has a screwed portion 27 rotatable in a corresponding threaded bore 28. The valve head 12 cooperates with a seat 7 mounted against a shoulder 6 in a chamber 5 and the valve head 14 co-operates with a seat 15 mounted in a ported hollow member 16 having a flange 19 cooperating with a shoulder 18. In the position shown the opening 2 is in communication with the opening 25. By rotating the stem 11 by means of the lever 29 the stem is axially movable until the head 14 seats on the seat 15 thereby sealing off the opening 25. At the same time the inlet 2 is brought into communication with the outlet 8. The lever 29 is positively retained in either of the two positions of the valve by cam detent means comprising a pair of mating cam end faces 50, 55, one of which is formed on a collar 53 slidable on the hollow member 49 and spring-urged against the other which is formed on a skirt portion 52 secured to the sleeve 33, which is in splined engagement with the stem 11. The sleeve 33 has a flange 34 fixed in a cup-shaped member 36 held against a bearing ring 37. The ring 37 is mounted in a screwed sleeve 38. The lever 29 is secured on a splined extension of the member 36 by a screw 47. The cam faces 50 and 55 have lobes and valleys spaced 180 degrees apart. The lever 29 can be arranged relative to the filler valve of the liquid oxygen system so as to overhang and prevent the filler valve being opened when the lever 29 corresponds to the position of the valve 1 when the outlet 2 is in communication with the distribution outlet 8.
Patent GB-111851-A (GB)
Title: Improvements in and relating to Electric Switches.
Inventor: TUA GIACINTO
IPC: H01H19/02
Filed: 1917-11-24
Abstract: 111,851. Tua, G. Nov. 24, 1916, (Convention date). Switches, quick-action.-A multiple-position turn switch comprises a plate member 1 fixed to the base and having upturned portions 1<1> constituting cam surfaces which co-operate with a cam-plate 6 secured upon the rotary spindle 7, a step-by-step snap movement being afforded by a spring 10 which tends to keep the cam parts together. The projections 1<1> are produced by bending the material of the plate 1, and the parts which separate them lie flat and extend beyond the projections. The plate is secured by one or more segments of insulating-material. The cam plate 6 has a downwardly bent central portion; it is secured to the spindle by a pin 8 passing through the spindle and underneath stirrups 6<111> bent upwardly from the plate. A movable spring contact plate 11 is secured to the base by a screw 4, the inner end of which serves for the attachment of one of the leads, and its free end lies over another contact screw 4 to which the) other lead is connected. The ' off ' position of the switch is shown in Fig. 2, in which the downwardly extending central portion of the cam plate 6 lies between the fixed cam surfaces 1<1>. Clockwise rotation of the spindle lifts the cam plate 6 on the cam surfaces 1<1> against the action of the spring 10 until the dead-centre position is passed, when the spring 10 completes the movement, the depressed portion of the cam plate 6 engaging the free end of the contact plate and pressing it into engagement with the contact screw 4. A second contact plate 11 may be provided on the base and suitably wired to enable the switch to be used as a two-way switch. Corers.-The sides of the base and of the cover are conical and the base has lateral projections 2<111> which ensure that the cover is fitted correctly on the base, in which position passages 2a and 5a are in alinement to receive screws which secure the base to its support and, at the same time, secure the cover to the base. Handles.-The handle 9 is secured to the spindle by a lateral screw 9<1> as shown in Fig. 1.
Patent GB-1086353-A (GB)
Title: Cine-film cartridges
IPC: G03B21/32
Filed: 1964-04-27
Abstract: 1,086,353. Film magazines for endless films. H.L.V. DAY. Feb.11, 1965 [April 27, 1964], No.17461/64. Heading G2E. In a film cartridge for an endless roll of cine film, a closed film feed path is defined by rollers 7, 15 and an inclined mirror 13 is mounted internally to reflect the projection beam through the film. The end face, of a cartridge of transparent plastic, has slots to enable the film to run along its outer surface. When loaded in a projector having continuous drive sprockets 8 and 14 and intermittent feed sprocket 10, the film is driven through gate 9 and past sound head 11 and sound drum 12.
Patent GB-719465-A (GB)
Title: Improvements in the manufacture and treatment of pile fabrics
Inventor: ISSUM HANS VAN
IPC: D04H11/00
Filed: 1951-07-24
Abstract: <PICT:0719465/IV(c)/1> The pile of a woven pile fabric, or an assembly of yarns or sliver destined to form the pile of a cemented pile fabric, is embedded in a slab of alginate gel, and a solution or emulsion of polyvinyl chloride is applied to one surface whilst the other surface is subjected to suction, whereby the coating 15 is drawn round and into (possibly right through) the pile to reinforce it, as at 24, 25; in the case of a cemented pile fabric, a second coating of synthetic resin (preferably thermoplastic) is applied to the protruding ends 23 of the pile and united with the first coating to form a backing; in the case of a woven pile fabric, the first coating reinforces the base fabric as well as the pile, though, a further non-porous backing may be applied also.  A machine for making cemented pile fabrics comprises foraminous conveyor belts to take the slabs under spiked rollers, which remove the gel from the upper ends 23 of the pile; through an oven, in which suction is applied to the bottom of the slabs to extract moisture; under a doctor roller, which applies synthetic resin; under air jets and over suction troughs, which cause the resin to be drawn into the pile; through a curing oven; under a doctor, which applies a second coating of resin; and through another curing oven.  A continuous length of fabric can be made by passing the slabs through the machine touching one another. Specifications 588,548, 600,119, and 611,927, [all in Group IX], are referred to.
Patent GB-172910-A (GB)
Title: Improvements in or relating to the method of separating defective cigarettes and empty tubes from perfect cigarettes and in means adapted therefor
IPC: A24C5/345
Filed: 1921-06-28
Abstract: 172,910. Ekstr÷m, G. C., and Johnson, B. A. E. June 28, 1921. Cigarette-making machines.- Relates to the separation of broken or defective cigarettes from perfect cigarettes and consists in passing the cigarettes along tracks or supports with converging or narrow parts so that broken cigarettes drop between the supports and defective cigarettes overbalance at one side. In the arrangement shown in Fig. 2, the cigarettes 2 are carried between guide-threads 11, 11' on converging travelling threads 8, 8', and the perfect cigarettes pass on to the parallel threads 13, In modifications, series of parallel threads at different distances apart are used. In a modification, Fig. 5, the cigarettes are moved forward step by step along a rotated stationary frame 20, with narrow interrupted parts 21, 22, by a similar frame 30, which is moved upward, forward, downward and backward by suitable mechanism. In another modification, the cigarettes are carried by a grooved drum down a curved open frame with converging sides, and the perfect cigarettes are carried off on diverging threads.
Patent GB-351221-A (GB)
Title: Improvements in and relating to electric switches
IPC: H01H71/44
Filed: 1930-06-06
Abstract: 351,221. Electromagnetic switches ; rocking-bar controllers. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Goff, R. W. ; 114, North Dean Street, Schenectady, New York, U.S.A.) June 6, 1930, No. 17644. Convention date, June 8, 1929. [Classes 38 (iii) and 38 (v).] Switches 12, 13 controlling armature resistance are closed sequentially by the rotation of a shaft 22 acting through mutilated tooth gearing 51, 511. The teeth of this gearing are so shaped that the switches are locked in their " closed " position or in both their closed and open positions. Upon the operation of a " start pushbutton, a solenoid 10 is energized, lifting its core 18 and immediately closing a main switch 11 which connects the motor to the line. At the same time a spring 41 is compressed so that the shaft 22 rotates slowly under the influence of retarding mechanism 14. Attached to the shaft 22 is a gear member 51, Fig. 6, which gears with teeth 58, 59, 60, on the movable switch member 50 and so closes the switch. In the closed positions a cylindrical part 63 on the element 51 rests between the teeth 58, 60, and at the end of the tooth 59 which is shorter than the others, so that the switch is locked. If the switch is to be locked in its open position as well, additional teeth 70, 71, 72 are added. Any desired number of switches are sequentially operated in this manner by arranging the gear elements 51 of each in their proper positions on the shaft 22.
Patent GB-204384-A (GB)
Title: Method of protecting iron articles intended to be subjected to high temperatures
IPC: C23C4/02
Filed: 1922-06-27
Abstract: 204,384. Metallisation, Ltd., and Gillespie, W. M. June 27, 1922. Coating.-Metal or alloy articles such as firebars and parts of gas producers, which are exposed to high temperature, are protected from corrosion by an aluminium coating subsequently converted into oxide, the coating being applied after the surface area of the article, has been enlarged so as to provide interstices and indentations to be filled up by the refractory aluminium oxide. The surface area is prepared e.g. by roughening by sand blasting, or by producing roughened or unfinished castings. and the aluminium may be applied by spraying. The metal surface, after being roughened, may be subjected to a slight oxidizing treatment so that when the aluminium is applied an alumino-thermic mixture is formed. When the article is submitted to high temperature the consequent reaction produces the metal in statu nascendi, thereby facilitating the formation of an aluminium alloy on the surface of the metal or alloy article, said aluminium alloy having an outer surface of aluminium oxide.
Patent GB-1076237-A (GB)
Title: Rectifier arrangements
IPC: H01L23/40
Filed: 1966-04-22
Abstract: 1,076,237. Semi-conductor rectifiers. SIEMENS-SCHUCKERTWERKE A.G. April 22, 1966 [April 23, 1965; May 31, 1965], No. 17776/66. Heading H1K. [Also in Division H2] A thyristor or other monocrystalline semiconductor rectifier is mounted in a housing having a pair of opposite faces separated by a distance less than the housing dimensions parallel to the faces. The rectifier is mounted in a housing 55 between a pair of cooling arrangements 30, 31 each in thermal connection with one of the faces and in electrical connection with one of the anode and cathode of the rectifier. Electrical components such as the thyristor control circuit and cut-outs in series with the thyristor (in the lower part of Fig. 2) are mounted on one of the cooling arrangements 30 by a bracket 42. The cooling arrangements are joined by screws 44 and uniform pressure is ensured by the cores 47. If liquid cooling is to be used (Fig. 4, not shown) the thyristor (72) is in a housing between cooling members which are electrically insulated by a ceramic such as beryllium or aluminium oxide. The surface of the thyristor may be coated with evaporated or electrodeposited soft metal (Brinell hardness less than 10) such as indium, gallium, lead or tin.
Patent GB-1061752-A (GB)
Title: Improvements relating to radio aerials
IPC: H01Q9/08
Filed: 1963-05-06
Abstract: 1,061,752. Aerials. J-BEAM AERIALS Ltd., and B. SYKES. April 20, 1964 [May 6, 1963], No. 17788/63. Heading H4A. [Also in Division H1] An aerial consists of a balanced radiating element such as a folded dipole 10 having a housing 11 for the connection to a feeder cable F which is unbalanced or unmatched with respect to the element 10, the housing 11 having an insulating plate 15 with discrete areas 16 and 17 thereon of metal deposited by printed circuit techniques, these areas connecting the feeder cable F to the element 10 and constituting a matching transformer. In the arrangement shown, each end 10a of the folded dipole is connected through a terminal 12 and 12a respectively to a conducting strip 17 of the printed circuit forming one winding of the transformer. The inner conductor C of coaxial feeder F is connected to one end of the strip 17 via the terminal 12a and the outer screen conductor S of the feeder F is connected to the conducting area 16 of the printed circuit by an angle bracket 14 and nut 13, the area 16 being separated from the strip 17 by an insulating area I. Other arrangements of transformer winding may be used to give for example 1/1 balance to balance or 4/1 balance to unbalance. The element 10 may be provided with directors and/or reflectors.
Patent GB-1349046-A (GB)
Title: Method of producing a stable tantalum-aluminum thin film
IPC: H01L21/70
Filed: 1972-04-18
Abstract: 1349046 Ion-implanted Ta - Al films WESTERN ELECTRIC CO Inc 18 April 1972 [19 April 1971] 17843/72 Heading C7F [Also in Division H1] A Ta-Al film comprising 25-75 atom per cent Al is deposited on a substrate by vapour deposition or sputtering, is implanted with ions of N and/or O, and the film is then annealed to repair surface damage. The film may be applied by sputtering in argon, and implanted with ions at energies of 50,000 to 300,000 V, the penetration depth being 400-2500 ; annealing is at 500-700C. In an example, a resistor is made by sputtering from a Ta cathode partly covered by Al strips on to a substrate of SiO 2 - coated Si; providing the Ta-Al film with contact areas of Ti coated with Au, producing a resistor pattern, masking the contact areas, ion-implanting the resistor pattern, and annealing.
Patent GB-1529087-A (GB)
Title: Store ejector release units
IPC: B64D1/06
Filed: 1976-04-30
Abstract: 1529087 Interchangeable ejector unit for aircraft WESTLAND AIRCRAFT Ltd 19 April 1977 [30 April 1976] 17844/76 Heading F3C A bomb or weapon carrier is carried in an aircraft by a release unit having alternative sway-bracing means arranged for interchangeable selective fitment to the unit so as to provide for sway bracing of the bomb &c. by a crutched or crutchless system as required. In Fig. 1 a double-pronged hook 12 engages two apertures in a saddle mounted on the bomb, and is pivotable about a removable sleeve 13 by a lever 15. Tie rods 25 automatically slide spaced wedges 23 along channels 24 in the unit body 10, to brace the wedges against the bomb saddle for crutchless bracing. A spigot 16 locates in a saddle aperture for centralizing, and on release of the hook and wedges a piston 28 ejects the bomb &c. For crutched bracing double-pronged hook 12 is removed and replaced by a singlepronged hook 29 (Fig. 5) also pivoted about sleeve 13. Spigot 16 is unscrewed and replaced by the projecting cylinder 35 of a pair of conventional crutch arms 32 and screw operated bracing pads (see also Fig. 7). The bomb lug 30 locates within cylinder 35 and on the hook 29. The wedges 23 can be retained, or replaced by arm keys 39. The crutch arms 32 can include a spigot for use with the crutchless items of the unit, or fit over a spigot which is concentric with the ejection piston. The release is duplicated for each bomb or weapon.