3340 THE COLLIERY GUARDIAN. December 24, 1914. NEW PATENTS CONNECTED WITH THE COAL AND IRON TRADES. Applications for Patents. 23994. Automatic pit prop. S. Horsfield. 24001. Chain grate and the like automatic stokers. A. W. Bennis. * 24005. Signalling apparatus. T. Powell. 24008. Coal bunkering vessels. W. G. Bead. 24039. Maximum current or overload circuit breakers. W. J. Mellersh-Jackson. (Soc. Anon. Movo, Switzerland.) 24040. Devices for separating solid substances from liquid masses by suction. H. Hencke. 24053. Construction of diaphragm pumps and pressure jacks. H. J. Harding. 24064. Machinery for separating stones or other hard material from clay, ore, or other like substances. H. Alty, junr. 24082. Piston rings. Lancaster and Tonge Limited, and J. Butterworth. 24083. Miner’s safety lamp. A. Woodhouse. 24085. Furnaces for the preparation of artificial fuel or the like. V. Groom. 24088. Flexible electric cables. W. T. Henley’s Telegraph Works Company Limited, and W. F. Bishop. 24094. Electric lamps. R. W. Birkett and J. S. Wolff. 24104. Fluid-operated percussive tools and the like. H. Sanderson and J. G. Hardy. 24107. Valve mechanism. T. D. Kelly. 24108. Controllers for electric motors. Pickerings Limited, and J. Fothergill. 24109. Debris-removing device for percussive rock drills. G. Mairet. 24120. Grinding and crushing mills. E. Bouvier. 24137. Mechanism for operating tipping wagons and the like. Albion Motor-Car Company . Limited, and T. L. Webster. 24154. Low temperature distillation retort. E. G. Appleby and J. F. Wells. 24162. Steam generators. Soc. J. et A. Niclausse. 24166. Boxes for moulding concrete and the like. J. S. Fozzard and C. Battey. 24177. Bessemer converters. G. J. Stock. 24180. Radial steam or gas turbines. Aktiebolaget Ljung- stroms Angturbin. 24216. Distributing valves for direct-acting pumps and the like. H. D. Shrimpton. 24228. Distribution valve for steam engines. H. P. Rouet. 24253. Automatic retarder and restarter for corves and the like. F. M. Castleman. 24254. Mechanical signalling apparatus. J. A. Thorne and S. Tulip. 24263. Vertical tubular boilers adapted to be heated by means of waste gases. A. Dietzius, and Warme- Verwertungs G. m.b. H. 24264. Air heaters, more especially ^suitable for use in smelting works. A. Dietzius, and Warme- Verwertungs G. m.b. H. 24289. Ventilation of retort houses. A. M. Duckham. 24296. Process and apparatus for drying explosives and the like, and the product obtained thereby. E. C. R. Marks. (E. I. Du Pont de Nemours Powder Company, U.S.A.) 24299. Process for treatment of lignite, brown coal, peat, wood, and the like raw fuel materials. C. Mehlhardt. 24314. Pneumatic rock drills. F. E. Kewley and J. A. Corner. 24338. Switchgear for electric distributing systems. J. F. Watson, and Callender’s Cable and Construction Company Limited. 24352. Explosives. C. G. Redfern. (Dinamite Nobel Soc. Anon., Italy.) 24356. Moulding machines for foundry and like use. J. E. H. Craven. Complete Specifications Accepted. (To be published on January 7, 1915.) 1913. 20258. Method for consuming by fire, dynamite fumes, gases, and dust in the atmosphere caused by blasting, drilling, and the like in mines. Alderson. 23229. Rope grips or jockeys for mechanical haulages and the like. Cannon. 23861. Clutches for winding engines or other machines. Gardner. (Smeeth.) 26116. Method of converting a single-stage compressor into a fluid-pressure engine and vice-versa. Gibbs. 26245. Metal bending machines. Vollmer. 28508. Safety apparatus applicable to mine cages and the like. Lott and Davies. 28849. Furnace grates. Bennis.. 29629. Buffers for railway and like vehicles. Spencer. 29773. Absorbent material for use in forming explosives with liquid air or oxygen. Soc. 1’Air Liquide (Soc. Anon, pour 1’Etude et TExploitation des Procedes Georges Claude). 1914. 224. Coaches for railways and like purposes, and the manufacture of the same. Metropolitan Carriage Wagon and Finance Company, and Wigley. 341. Reversible electric motors. Warnholz, Spencer, and Wigmore. 939. Pneumatic drills. Saxby and Farmer Limited, and Brittain. 1385. Former bars or mandrels for use in presses for forging, bending, and stamping metal. McDougall. 2650. Process and arrangement of plant for the treatment and recovery of tar and ammonia liquor from producer or other gas. Moore, and Dawson and Mason Gas Plant Company. 5137. Pumping of liquids which approach the pump at different levels. Pennell and Boving. 8894. Valves and valve gears for steam pumps and other direct-acting fluid-driven engines. Reingpach. 10841. Mining bells. Heyes and Heyes. 11491. Signal systems. Webster. 14188. Underground conveyors for the transmission of coal to various parts of a mine or pit. Hare. 14568. Conveyors for use in coal mines. . Kershaw. 15561. Projectors for coal and like solid materials. Gibbons, and W. J. Jenkins and Company. 17407. Briquette machine. Rogers. (St. Louis Briquette Machine Company.) 18994. Boring machine. Pollitt and Wallwork. Complete Specifications Open to Public Inspection Before Acceptance. 1914. 11698. Couplings for railway wagons and the like. Benda and another. 23197. Speed indicating device for use more particularly in tachometers. Beckmann. 23305. Automatic coupling devices. Boucher and another. CAPTURING ENEMY PATENTS. The following list of British Patents which have been granted in favour of residents of Germany, Austria, or Hungary, is furnished in view of the new Patents Acts, which empower the Board of Trade to confer upon British subjects the right to manufacture under enemy patents, and is specially compiled for the Colliery Guardian by Lewis Wm. Goold, Chartered Patent Agent, 5, Corporation-street, Birmingham. It is desirable in the first instance to obtain the latest particulars upon the Register of Patents. If any patent listed has been assigned to a non-enemy proprietor, the law does not apply. 20145/11. Preparing peat. Raw peat to be dried is mixed with hard dry compressed peat and the mixture compressed, the product being used as fuel, or mixed with further supplies of raw peat, and treated in the same way. The pressure is continuously and gradually increased. E. Albresch, Germany. 20146/11. Drying and like presses. E. Albresch, Germany. 20312/11. Fuel; grinding, crushing, etc. P. Hoering, Berlin (dated February 3, 1911). 20633/11. Gas producers; ashes, removing. Gas producer of the kind having a rotary ashpan carrying a rotary grate. A. von Kerpely, Vienna. 20651/11. Tipping apparatus. Maschinenfabrik Augsburg- Nurnberg Akt.-Ges., Germany (dated Jan. 6, 1911). 20927/11. Column stills, etc. H. A. Gasser, Germany (dated March 3, 1911). 21019. Haulage rope grips. Relates to Toad actuated grips for suspended cableways, in which the haulage rope enters the grip jaws from below, and comprises an arrangement whereby any tendency to drag the rope out of the grip increases the gripping force. M. A. and M. P. Bleichert, Germany. 22424/11. Composition fuel; treating ores. Close burning coal, coke, ore, or other material difficult to agglomerate by pressure alone, is mixed with a binding agent made by adding hot liquid pitch or other ingredient that liquefies when heated, to wet caking coal, the mixture being strongly compressed to form briquettes. A mixture of pitch, tar, naphtha, and mazut, or of two parts resin and one part of mineral oil, may be used instead of pitch. A binding agent, consisting of three parts by weight of finely-ground dry caking coal, one part of preferably cold water, and one part of the hot liquid ingredient, may be added to about 20 parts of the material to be agglomerated, and the product pressed at about 400 atmospheres. F. O. Gripp, Germany. 22696/11. Coking. Coal of inferior quality, peat, lignite, wood waste, etc., is mixed with a binding agent, such as pitch, tar, or the like, and compressed to a high degree into small briquettes or the like, which are fed continu- uously through coking chambers heated, at least partly, by the introduction of steam superheated to coking temperature. E. Enke, Germany. 22940/11. Pneumatic tools; fluid-actuated gears; bent or lift valves. In valve gear for pneumatic tools of the type in which the distributing valve is reversed by compression of the cushioning fluid, the valve is a lift . valve having a cylindrical body fitting the valve chamber and spherical ends, which have seatings on the ports at the ends of the valve chamber leading to the cylinder. H. Dornen- burg, Germany. 22993/11. Grab buckets. J. Pohlig, Akt.-Ges., and E. Kraemer, Germany (dated October 25. 1910). *** Copies of any of the above specifications can be supplied at the price of Is. post free. Application to Avoid or Suspend Patents or Licences. No. and year of patent. Grantee. Applicant. | Date of [ hearing. 27415/11 Reinhard (Props or stemples for mines) Stewarts and Lloyds Ltd., Broad-street Chambers, Bir- mingham Jan. 18, 1915. CATALOGUES AND PRICE LISTS RECEIVED. Messrs. M. Glover and Company (Leeds) send us a leaflet relating to their “ Dreadnought ” firewood chopper. Messrs. Earley and Pearsall Limited (125, Westbourne Park-road, W.), in a leaflet which they have just issued, reproduce some typical extracts from the works of Charles Dickens, commending coal fires. An interesting little booklet on small motor applications has been issued by the British Westinghouse Electric and Manufacturing Company Limited (Trafford Park, Man- chester), who have a separate department dealing with this branch of work. Messrs. Bruce Peebles and Company Limited (Edinburgh) send us their desk companion for 1915, which consists of a handsome blotting pad diary. A reference book at the right hand side gives abridged specifications, approximate price-lists, and illustrations of the firm’s manufactures. Messrs. Head, Wrightson and Company Limited (Stockton-on-Tees) have issued yet another booklet in the uniform mining series to which we recently drew attention. This covers coal screening and sorting plant, and there are some excellent photographs of representative installations, both in this country and in the Colonies. In addition to complete equipments, some interesting individual equip- ments are shown, such as tipplers, picking belts, plate belts, creepers, jigging screens, elevators, etc. ABSTRACTS OF PATENT SPECIFICATIONS RECENTLY ACCEPTED. 925 (1914). Improvements Relating to Electric Current Controllers and like Apparatus. G. Ellison, of Victoria Works, Warstone-lane, Birmingham, Warwickshire.—Has for its object to provide an improved finger or spring contact for use in controllers, rheostats, and like electrical appa- ratus. The accompanying drawing shows a longitudinal section of a contact constructed in accordance with the inven- tion. The bracket supporting the movable part of the finger is produced by stamping operations on a suitable metal sheet with a pair of straight main portions arranged at an angle to each other. To the inner side of one end of the abutment part a is secured by a bolt c or rivet one end of a phosphor-bronze or other suitable spring blade d, and at the free end of the spring blade is secured a stiff bent bar e, which at its outer end has attached to it the usual renewable contact piece f. The space between the sides formed by the channel section of the abutment part of the bracket is rather wider, for the greater part of its length, than the spring blade d and bar e, in order to permit of free move- ment of the latter. At the front of the spring blade are secured the conducting strips g, which convey the whole or the greater part of the current from the bracket to the bar e a carrying the contact piece, and prevent any heating of the spring blade d which might result in its deterioration. The provision of thin conducting strips in conjunction with a stiff blade is8a known device in contacts of the type herein described. The aforesaid bar e is attached to the spring blade, as shown, and the abutment part a at the opposite end to that at which the blade d is connected, is so extended that it supports the bar near its outer end. As the opposite end of the spring blade is in contact with the bracket (through the strips g) the blade is deflected when the bolt c is tightened, and thus caused to exert the initial spring action. Free movement of the contact in the backward direction against the spring action is limited by a rear abut- ment comprising ears h formed at the rear of the abutment part. Below the portion of the abutment part a, against wrhich bears the bar e the said part is gapped to accommo- date the rivets i and the lower end of the bar. The whole device is secured in position in the controller by a screw inserted through the slot j in the attachment piece, the length of the slot being proportioned to permit adjustment of the contact piece, without interfering with the spring action of the blade d. (One claim.) 7820 (1914). Improvements in and Relating to Centri- fugal Compressors, Pumps, and the like. The British Thomson-Houston Company Limited, of 83, Cannon-street, London, E.C. (A communication from the General Electric Company, of Schenectady, County of Schenectady, New York, U.S.A.)—Relates to impellers for centrifugal com- pressors and pumps, and particularly to the manner of constructing the same. The object is to construct an impeller which will be sufficiently strong and rigid to with- stand the stresses to which it is subjected, but which at the .0 !■ same time avoids the use of both the shaft opening and the hub, as is found in the ordinary impeller. To this end the impeller is cast in two parts, the division being preferably in the central plane of the web at right angles to the axis, and integral with each of these parts, and projecting there- from a shaft section is cast. In other words, the shaft is cast integral with the impeller, the casting being made in two parts, and suitably jointed together. Fig. 1 is a sectional view of a compressor, having the improved form of impeller; fig. 2 is a side view of the impeller. (Three claims.) 13828 (1914). Improvements in or Relating to Clino- meters. J. A. L. A. Eliphelet, of 44, Shernhall-street. Walthamstow, London.—Relates to improvements in clino- meters of the pendulum type, in which two pivotally- mounted members are arranged to swing in planes at right angles to each other, so as to indicate on a fixed index, scale, or dial the gradients in directions disposed transversely to one another. According to the invention, a clinometer of this kind is provided comprising a fixed index, a relatively rotatable frame carrying a pointer or vernier scale, and a rotatable index carried by the rotatable frame, and disposed transversely of the fixed index for co-operation therewith or alternatively with the moving frame. In one way of carry- ing out the invention, within a fixed graduated circular index ring is disposed a balanced and fulcrummed frame, carrying on a suitable pivot a circular index ring, which is weighted and disposed transversely to the fixed index ring,