baber/WOPTO huggingface dataset:
Patent GB-191401021-A (GB)
Title: Improvements in or relating to Sewing Machines.
Inventor: TOPHAM LAURENCE ELMER
IPC: D05B15/04
Filed: 1914-01-14
Granted: 1915-03-15
Abstract: 1021. Topham, L. E., Ashworth, F., and British United Shoe Machinery Co. Jan. 14. [Addition to 24,331/12.] Boot-sole, sewing-machines; stopping-gear, non-automatic; presserbars, lifting. - Comprises improvements in the starting and stopping gear described in the parent Specification, and in the presser-operating gear described in Specification 23,478/10. The pin 77 by which the slow-speed gear is controlled is raised and lowered by means of a cam - surface 90 on a lever 91 which engages a bowl 89 on a threearmed lever 86 coupled to the pin 77 by a link 84. When the lever 91 is raised free of the bowl 89, a spring 111 presses the pin 77 upward and, as the pin 77 enters the cavity 76, turns the lever 95 about its pivots on the sleeve 96 to bring its arm 95 into the plane of the cam 98. In the further rotation of the main shaft, the cam 98 moves the lever 95 outwards, turning it with the sleeve 96 and the lever arm 99 about the spindle 97, and the movement is imparted to a lever 101. This lever, being moved, engages a stop 105 and thereby moves a presser-releasing and raising lever 39, releases the thread tension, and by means of a screw 115 moves a brake lever 116 to bring a brake slide into contact with the fly-wheel. To reduce the effort required to move the lever 95 from engagement with the cam-stop 113 when the machine is to be restarted, the cam 98 is recessed immediately in front of that stop, and the lever 95 is held from following it by a latch which falls into engagement with the lever 101 in its extreme position. The presserreleasing and lifting lever 39 has an arm 40 with a cam-surface 42. When the lever 39 is moved either by the cam-lever 95 or by the presser-lifter 37, the cam-surface 42 presses upon a bowl 43 and moves a lever 26, which communicates its movement by means of a stop 32 to a lever 25, which is coupled to a lever 21 by which the nut 20 is unlocked and the presser consequently released. During this operation, a bowl 38 on the presser-lifter is brought into contact with the presser lever 5, and further movement of the levers 39, 37 raises the presser from the work. Prior to starting the machine, a movement of the lever 91 to bring the part 94 of the cam 90 into engagement with the bowl 89 is not sufficient to remove the pin 77 from the cavity 76, but releases the presser so that is can be lowered on to the work.
Patent GB-191402955-A (GB)
Title: Improvements in Devices for Preventing Shock in Oil Presses.
IPC: B30B9/04
Filed: 1914-02-04
Granted: 1915-07-29
Abstract: 2955. Harburger Eisenund Bronzewerke Akt.-Ges., and Koeber, G. Feb. 4 Fatty oils, extracting by pressure. Relates to presses for extracting oil, in which the seed contained in a perforated cage g is compressed by a downwardly-moving plunger, and the compressed cake is removed by an upwardly-moving plunger. The parts, such as the cage g and oil-collecting channel f, which are raised during the removal of the cake, are prevented from falling suddenly, by being held in the raised position by devices such as hydraulic plungers d operated in cylinders a attached to a stationary part of the press. The plungers d may be operated bv the pressure fluid which operates the press plungers.
Patent GB-191409268-A (GB)
Title: Improvements in and relating to Fenders for Ships, Boats & the like.
Inventor: SHIPMAN GEORGE RUFUS
IPC: B63B59/02
Filed: 1914-04-14
Granted: 1914-09-03
Abstract: 9268. Shipman, G. R. April 14. Fenders.-Bow and stern fenders comprise a number of rollers 10 arranged vertically in a frame 7. In order to deflect small obstacles away from behind the rollers 10, outwardly flared parts 16 are formed on the frame 7. Between the hull A and the rollers 10, supports 12 are fitted, having ball bearings 14 ensuring free rotation of the rollers. A similar arrangement of rollers is fitted round the stern of the vessel.
Patent GB-191410237-A (GB)
Title: An Appliance for Moistening and Attaching Adhesive Stamps, Gummed Flaps of Envelopes and similar Adhesive Articles.
Inventor: PATTERSON SAMUEL HUGH
IPC: B43M11/00
Filed: 1914-04-25
Granted: 1915-04-22
Abstract: 10,237. Patterson, S. H. April 25. Stamp-applying; closing envelopes. - Adhesive stamps, envelope flaps, &c. are damped by a brush c which is provided with a block for affixing them.
Patent GB-191410412-A (GB)
Title: Improvements in Apparatus for Making Articles of Paper, Cardboard and the like.
IPC: D21J3/00
Filed: 1914-04-27
Granted: 1915-07-22
Abstract: 10,412. Mauersberger, W., and Allgemeine Treuhand Akt. - Ges. April 27. Moulding pulp.-Apparatus for moulding articles from paper pulp comprises a fixed core k surmounted by a pair of spaced walls b, c, which are respectively pervious and impervious and are covered by an elastic sieve d, and a mould e. In use, a layer of pulp is placed upon the sieve d and covered by the mould e ; fluid under pressure is then admitted behind the wall c through passages h, l to force the pulp into the mould ; the fluid pressure is then cut off, aud air under pressure is simultaneously admitted through passages a between the walls b, c, and through the sieve d to facilitate the separation of the sieve from the article, and the mould is raised with the article. To facilitate the escape of air during pressing, and the separation of the article after pressing, the walls b, c or the wall c only may be reduced towards the top as shown in Fig. 4 ; also the top of the sieve may be hollowed.
Patent GB-191411453-A (GB)
Title: Improvements in Water Closets for Railway Carriages and the like.
Inventor: KENDRICK SYDNEY JOHN
IPC: B61D35/00
Filed: 1914-05-09
Granted: 1914-08-07
Abstract: 11,453. Kendrick, S. J., Le Feuvre, F. T., and Beresford, H. J. May 9. [Addition to 10,131/13.] Railway-carriage closets; non-contact closets; basins.-To the closet described in the parent Specification is fitted a securing-device for the basin operated by the foot-rests. When the basin is in lowered position for the use of orientals, the foot-rests g are at the front, but after the basin has been raised, they are turned on pivots through 180 degrees. During this movement, lugs q on the foot-rests contact with quadrant - shaped pieces n which are pushed into recesses s in ribs r and so support the basin.
Patent GB-191411843-A (GB)
Title: Sheet Feeding and Registering Mechanism.
Inventor: FAIRWEATHER HAROLD GEORGE CRUI
IPC: B65H9/06
Filed: 1914-05-13
Granted: 1915-02-11
Abstract: 11,843. Fairweather, H. G. C., [Schmidt, F. L.]. May 13. Sheet-carriers; guides; registering - devices. - In a sheet feeding and registering device, particularly for feeding envelope blanks, the sheets are forwarded by means such as tapes 13 to gradual stopping means, such as spring fingers 42. These are then lifted to allow the sheet to pass to positive stopping and registering devices, such as adjustable guide - pins 10, which are moved away at the right moment to allow the sheet to be forwarded by means such as segmental rollers 36, 38. In this way thin sheets are prevented from being damaged by too sudden stoppage. Fixed guide-fingers 19, with pockets 20 for revolving balls 21, may help to guide the sheet, and are adjustably mounted on a shaft 17. The fingers 42 are mounted adjustably on a squared shaft 45 so that their ends engage the sheet just before it reaches the pins 10. The pressure of the fingers 42 on the paper is adjusted by screws 48, and the fingers are cam-operated so as first to stop the sheet, then lifted to allow it to pass slowly to the pins 10, then lowered to grip it while the pins 10 are tilted out of the way by camoperated devices, and finally lifted at the same moment as the segmental roller 38 and the roller 36 grip the sheet and forward it past rollers 56, 57. The pins 10 may act as side-registering guides as well as front stops, and are laterally adjustable on the shaft 24 and longitudinally adjustable by screws 25.
Patent GB-191413214-A (GB)
Title: Mill for Grinding Corn and the like.
Inventor: JENSEN OTTO
IPC: B02C7/18
Filed: 1914-05-29
Granted: 1914-10-22
Abstract: 13,214. Jensen, O. June 6, 1913, [Convention date]. Disk mills.-In a mill with a rotating stone 5 pressed towards a stationary stone 7, a centrifugal blower 14 disposed by the side of the runner 5 serves to cool the runner and to transport the corn from the hopper 17 to the feedworm 8. The hopper 17 is provided at the top with a feed-roller 19 which receives the corn &c. from the funnel 18, the feed being regulated by means of a sliding plate 21. A canal 22 in the casing 1 runs from the lower part of the hopper 17 to the bushing 9, where the worm 8 rotates, and the hopper 17 is connected by means of a hole with that part of the interior of the casing where the blower operates, so that the corn is blown through the canal 22 to the worm 8, and any heavy foreign objects are left behind. The runner 5 is pressed towards the stationary disk 7 by a spring 12, and can be moved away from the disk 7 by means of a hollow screw 10 which forms a bearing for the axle 4. The disks 5, 7 are made of carborundum, and the disk 7 is secured by screw-bolts 15 and adjusted by screw-bolts 16. The flour escapes through an outlet 23 at the bottom of the casing.
Patent GB-191414171-A (GB)
Title: New or Improved Means for Taking Azimuth Bearings.
Inventor: FIELD MICHAEL BIRT
IPC: G01C17/00
Filed: 1914-06-12
Granted: 1915-04-15
Abstract: 14,171. Field, M. B. June 12. Mariners' compasses.- An azimuth attachment for a gimballed compass bowl comprises means for producing at the plane of the card a virtual image of an external object or mark which may be viewed simultaneously with the card. As shown, the external object is viewed through the concave face 3 of a reflecting- prism 2, and the reading of the card 6 is taken by direct vision with the aid of vertically-spaced sights 16, 17. This prism may be replaced by one having two concave faces, or by a diverging lens and a plane prism or mirror, or by a curved mirror. The prism 2 is mounted in a frame 7 pivoted at 8 to uprights 9 on a rotatable three-armed base 10, the frame carrying balance weights 19 and tilting arms 11 supporting a fixed or adjustable handlebar 12, which is disposed near the vertical axis of the bowl. The instrument may be employed with magnifying and reflecting means supported independently of the compass bowl, such as are described in Specification 11,503/13.
Patent GB-191416055-A (GB)
Title: An Improved Covering for Ship's Decks.
Inventor: ROWAN JOHN
IPC: B63B3/14
Filed: 1914-07-06
Granted: 1915-07-06
Abstract: 16,055. Rowan, J., and Boden, J. July 6. Decks.-Ships' decks are covered with plates or slabs of cork or cork composition d such as " korkoid." An upper or final covering e of korkoid, " ruboleum," or other like material may be added. Reference has been directed by the Comptroller to Specification 25,580/96.
Patent GB-191417025-A (GB)
Title: Improvements in or relating to Electric Pocket-lamps.
Filed: 1914-07-17
Granted: 1914-11-05
Abstract: 17,025. Hitzelberger, G. F., and New British Ever Ready Co. July 17. Battery lamps.-A pocket lamp has a bridgepiece C fixed across the battery case to support the lamp bulb, and an insulated contact H adapted to engage a switch F and a battery terminal B<2>; the contact H being inclined to the case to ensure engagement with the terminal B<2>, without accurate positioning. In the form shown, the contact H consists of a strip of metal wound over an insulating-band G, which is threaded on a perforated lug C' integral with the bridge-piece C. The contact H is arranged lengthways in the path of the terminal B<2> and is made as long as possible. The bridge-piece C carries a lampholder D and is connected electrically to the case. The switch F is moved downwards to the on ' position and may be held ' on' or 'off' by friction or a detent.
Patent GB-191420371-A (GB)
Title: Improvements in Folding Mechanism for Rotary Printing Machines.
Inventor: READ GEORGE FRANCIS
IPC: B41F13/54
Filed: 1913-12-22
Granted: 1914-12-22
Abstract: 20,371. Read, G. F., and Smith, E. J. Dec. 22, 1913. Delivery apparatus. -Relates to means for severing the web delivered from high - speed printing machines and dividing the severed sheets into separate streams to be folded, the folded products of the two streams being collect,ed at delivery. In the form shown in Fig. 1, the web w passes over a longitudinal folder g and between guide rolls i to rotary carriers a, a' which, by cutting mechanism d, sever the web, each carrier then taking alternate sheets and by means of a tucking blade b tucking them into folding rolls i<1>, i<2>. The streams of folded sheets are reassembled by tapes or other suitable means. In Fig. 2, an intermediate cylinder h is shown arranged between the carriers a, a<1> and co-operates with the carrier a to sever the web. By this arrangement the sheets of each stream are folded similarly, i.e., in the same direction, by the blades b and rolls c, c<1> respectively. The two streams of folded sheets delivered from the folding-rolls are reassembled by an arrangement such as shown in Fig. 1.
Patent GB-191424386-A (GB)
Title: Improvements in or in connection with the Purification of Sewage.
Inventor: NAYLOR GEORGE WILFRED
IPC: C02F3/20
Filed: 1914-12-21
Granted: 1915-12-16
Abstract: 24,386. Naylor, G. W., and Naylor, J. F. Dec. 21. Aerating.-In purifying sewage by treatment with air iu finely-divided form, the air is passed horizontally into the tanks, or is passed into currents formed by partitions dividing the tanks into compartments. Air may also be passed through devices in the floor of the tank. The spaces between partitions 2, Fig. 1, and parallel baffles 3 are divided by cross-partitions 5 into a number of conduits into which project airsupply pipes G, 7. which have stopped ends and small perforations above the ends. The conduits may be formed by pipes with bent ends supported on the outflow sides of the partitions 2. In the tank 4, Fig. 5, the partitions 2 are arranged so that the flow is alternately over and under the baffles, and air-supply boxes 11 having perforated or permeable faces formed of cloth, porous tiles, &c. are attached to the walls of the baffles. The air-supply boxes may be arranged to overlap each other obliquely and to have inclined air-diffusing faces. The contents of the tanks may be agitated by revolving airsupply pipes, The sewage-inlet pipe 9 may be curved so as to give the sewage a whirling motion during its entry.
Patent GB-191501631-A (GB)
Title: Improvements in or relating to India-rubber or other Heels or Pads for Fixing the same to Boots and Shoes.
Inventor: LACE PHILIP
IPC: A43B13/34
Filed: 1915-02-02
Granted: 1915-09-16
Abstract: 1631. Lace, P. Feb. 2. Heels.-These are secured to the boot by b:- furcat d rivets D, the heads of which are embedded in the material of a rubber heel or are arranged between the lifts of a leather heel, while the prongs are clinched over the insole E, which may be perforated.
Patent GB-191504824-A (GB)
Title: Improvements in and relating to Valves.
Inventor: LOW ARCHIBALD NICOL
IPC: G05D23/02
Filed: 1915-03-29
Granted: 1915-08-26
Abstract: 4824. Low, A. M. March 29. Thermostats.-A thermostat of the type actuated by an expanding rod is fitted with a manually adjustable by-pass valve. The valve c is normally held open by a spring, but is closed, when the temperature is sufficiently high, by an expanding rod b which bears against an adjustable abutment e and against the end of a tube a secured to the valve member c. The by-pass j, k is controlled by a valve l actuated by a screw r, the squared end of which is protected by a cap s.
Patent GB-191505997-A (GB)
Title: Improvements in Draw-off Fittings for Geyers or Water Heaters.
IPC: F24H9/12
Filed: 1914-03-21
Granted: 1915-05-21
Abstract: 5997. Fourness Manufacturing Co., and Martin, J. March 21, 1914. Geysers; water delivery.-Apparatus of the kind described in Specification 7198/14 is arranged for the delivery of either boiling water or water not so hot by means of a single three-way tap a which may be set to place the expansion box d of the geyser in communication with the delivery bib by means of a pipe b, or to place the header c<1> of the geyser similarly in communication for the delivery of water below boiling temperature, or to cut off both these pipes from the bib and allow water to circulate between them. The positions are defined by means of an indicator plate f and pointer g.
Patent GB-191507306-A (GB)
Title: Improvements in Concrete Fence and like Posts.
Inventor: LOWRY FREDERICK
IPC: E04H17/20
Filed: 1915-05-15
Abstract: 7306. Lowry, F. May 15. Drawings to Specification. Fencing- - posts. - Concrete posts are constructed in two parts, the lower, for insertion in the ground, being made of stone or like concrete, and the upper of breeze or similar concrete. The two parts may be united by grooving &c., and a damp-proof layer may be inserted, the whole being coated with cement for waterproofing purposes if required.
Patent GB-191508855-A (GB)
Title: Improvements in Apparatus for Conditioning Yarn.
IPC: D01G99/00
Filed: 1915-06-16
Abstract: 8855. Brooks & Doxey, and Whitehead, J. June 16. Circulating or passing materials through fluid-supplying apparatus.-An apparatus for conditioning yarn comprises a trough A containing water and fitted with a number of paddles, cages, rollers, &c. B, which are wholly or partly submerged and are provided with pulleys and rotated by ropes, bands, or chains. The rollers &c. B submerge and carry through the trough A the bobbins or cops of yarn fed in at one end, which has raised sides a, from a skip or by means of a hopper or shoot from a higher floor. At the delivery end of the trough A, which also has raised sides, there is an inclined partly-submerged travelling lattice or band D driven by a chain or band d to pick up the cops or bobbins and deliver them into a skip or receptacle.
Patent GB-191509765-A (GB)
Title: Improvements in Expansion Control Devices for Coke Ovens and the like.
Inventor: ROBERTS ARTHUR
IPC: C10B29/04
Filed: 1915-02-01
Abstract: 9765. Roberts, A. Feb. 1. Coke ovens; bracings.-In a bench of coke ovens, the endlong compression on the heating- walls can be regulated independently for each individual wall. As shown in connexion with a coke oven of the kind described in Specification 1570/15, endlong compression on the heating-walls is maintained by vertical beams 10, connected in pairs at their upper ends by adjustable tie-rods 11 and controlled at their lower ends by screw adjustments 13. The working platforms 18, 19 are carried by the beams 10, and their outer ends are free to move relatively to the supporting-piers 21.
Patent GB-191511371-A (GB)
Title: Improvements relating to Helmet Ventilators.
IPC: A42C5/04
Filed: 1915-08-06
Abstract: 11,371. Bates, A. J., and Bates & Sons. J. & E. Aug. 6. Ventilating.-Instead of soldering the perforated plate a of a helmet ventilator to the usual ring c, the plate is formed with a flange b which is spun over the flange d of the ring; the lower edge of the ring may be turned in as shown. The screwed boss e may be secured to the plate a by soldering, as is usual, or by inserting a reduced end of the boss through an aperture in the plate and then spinning over the end of the boss.
Patent GB-191513799-A (GB)
Title: Improvements in Conductors for the Ignition System of Motor Vehicles and other purposes.
Inventor: NORTH OLIVER DANSON
IPC: H01T13/04
Filed: 1915-09-28
Abstract: 13,799. North, O. D. Sept. 28. Cable and wire terminals.-Conductors for the ignition systems of internal-combustion engines have a coiled spring wire core A and are attached to a terminal or eye C or other part by means of a bent shank D pushed into the core. In another arrangement, the stem D is screw-threaded and the cable screwed thereon.
Patent HN-2000000247-A (HN)
Title: Quimioterapia de combinacion
Filed: 2000-11-09
Abstract: LA PRESENTE INVENCION SE REFIERE A QUIMIOTERAPIA DE COMBINACION.
Patent HN-2002000018-A (HN)
Title: Dispositivo automatico-manual para controlar la salida de agua y cualquier fluiso; de funcionamiento mecanico y facil instalacion
Inventor: SOSA RAFAEL HIGINIO TAMAYAC
IPC: F16K31/40
Filed: 2002-01-24
Abstract: EL PRIMER OBJETO DE LA PRESENTE INVENCION ES PROVEER A TODO USUARIO DEL SERVICIO DE AGUA POTABLE SUMINISTRADA POR LA EMPRESA PROVEEDORA DEL SERVICIO, DE UN DISPOSITIVO DE FACIL INSTALACION Y PERMITA SER USO DEL SISTEMA DE AGUA SIN TENER QUE ESTAR PRESENTE PARA EL LLENADO DE RECIPIENTES, SISTERNAS,PILAS,TONELES,TINAS,BAÑERAS, INODOROS, PISCINAS Y DEPOSITOS EN GENERAL; CON LA SEGURIDAD QUE AL ALCANZAR EL AGUA EL NIVEL DESIADO, ESTA YA NO CIRCULARA MAS, EVITANDO DE ESTA MANERA LA INNECESARIA PRESENCIA DE UNA PERSONA PARA ABRIR Y/O CERRAR EL PASO DE AGUA. UN SEGUNDO OBJETO DE LA INVENCION ES PROVEER UN DISPOSITIVO QUE EVITA EL DESPERDICIO DE AGUA POR OLVIDO; AL FUNCIONAR TOTAL Y COMPLETAMENTE COMO SELLO EN CUANTO AL PASO NO REQUERIDO DEL VITAL LIQUIDO O AL ESTAR LLENADO AL RECIPIENTE A LLENAR UN TERCER Y NO MENOS IMPORTANTE OBJETO DE ESTA INVENCION ES PROVEER A TODOS LOS LUGARES Y HOGARES DONDE EL SUMINISTRO DE AGUA ES ESCASO Y UNICAMENTE DURANTE POCAS HORAS Y LA MAYORIA DE LAS NOCHES, DE UN DISPOSITIVO A BAJO COSTO QUE LES PERMITA NO DESCUIDAR SUS OTRAS ACTIVIDADES O NECESIDADES FISIOLOGICAS TAL COMO EL DESCANSO DE LA NOCHE POR RAZON DE ESTAR CONTOLANDO LA LLENADA DE LOS RECIPIENTES NECESARIOS PARA SUS NECESIDADESY CONSUMOS DIARIOS.
Patent HN-2006019068-A (HN)
Title: "sintesis de (r)-n-metilnaltrexona"
Inventor: HAROLD D DOSHAN
IPC: A61K31/485
Filed: 2006-05-25
Abstract: ESTA INVENCION SE RELACIONA CON LA SINTESIS ESTEREOSELECTIVA DE (R)-N-METILNALTREXONA(R-MNTX), LOS INTERMEDIARIOS DE LA MISMA, LOS PREPARADOS FARMACEUTICOS QUE CONTIENE R-MNTX O LOS INTERMEDIARIOS DE LA MISMA.
Patent HN-2009003274-A (HN)
Title: CONTROL REMOTO (segundo Diseno,Diseno Completo)
Inventor: YANO KEN
Filed: 2009-11-20
Abstract: EL ARTICULO CONTROL REMOTO RELACIONADO AL PRESENTE DISENO        ES USADO PARA CONTROLAR UNA UNIDAD DE ARITMETICA Y CONTROL LA CUAL FUNCIONA, POR EJEMPLO, COMO CONSOLA PARA VIDEO JUEGOS, EL CUERPO DE UNA COMPUTADORA PERSONAL, UN REPRODUCTOR PARA GRABAR MEDIOS (MEDIOS DE GRABACION TIPO DISCOS, POR EJEMPLO, DISCOS BLU-RAY, CD DVD ETC. MEDIOS DE GRABACION TIPO TARJETAS, MEDIOS DE GRABACION TIPO CARTUCHO ETC,) O UNA GRABADOR PARA TALES DICHOS MEDIOS.
Patent IN-2013MU01527-A (IN)
Inventor: ASHOK P SHAH
IPC: C11D1/722
Filed: 2013-04-26
Abstract: A cleaning emulsion for oil and grease removal having a neutral pH, multiutility applications and ecofriendly attributes. . In an embodiment, the cleaning solution comprises a first anionic surfactant, a second anionic surfactant, an emulsifying agent, an emollient, one or more additives, and a carrier. The first anionic surfactant is a linear alkyl benzene sulfonate surfactant, preferably diethanolamine dodecylbenzene sulphonate, the second anionic surfactant is linear alkanol sulfate, preferably sodium lauryl sulfate, the emulsifying agent is a fatty alcohol, preferably cetostearyl alcohol, the emollient is a glycol, preferably propylene glycol and the carrier is water. The cleaning emulsion may also include other components such as fragrance enhancers and other additives. The pH of the cleaning emulsion is approximately 7.0.
Patent IN-2014MU02857-A (IN)
Inventor: LAKSHMANAGOUDA GOVINDAPPA PATIL
IPC: B64D45/00
Filed: 2014-09-09
Abstract: Small water treatment plants (WTP) generally needs simple, robust and maintenance free units. Rapid or flash mixer (coagulation unit) is an important unit in the Water Treatment Plant (WTP). Jet flash mixer is simple, economical, maintenance free and robust. Formulation of design guidelines for the same was carried out with both computational fluid dynamics (CFD) and experimental fluid dynamics (EFD) approaches. The L/d ratio (length of rectangular basin/diameter of jet nozzle) equal to 18 was found to be the best for getting lowest residual turbidity. These type of alum coagulant mixers are recommended for small water treatment plants meant  for village areas.