962 THE COLLIERY GUARDIAN. May 18, 1917. 6 through the pipe 5 into the condenser 2, and flow away therefrom through the pipe 7 past the valve 9 to the hot circulating water culvert 4. When it is desired to heat the feed water for the generators of the plant, valves 8 and 9 are closed and valves 14 and 16 opened. Under these conditions water from the cold hot well tank 12 will pass through the pipe 13 and valve 14, and flow into the condenser 2, and from there through the pipe 7 and valve 16 into the hot well or feed water tank 15. As soon as the desired quantity of water from the tank 12 has been heated by being passed through the condenser 2 in the above manner, valves 14 and 16 will again be closed and valves 8 and 9 opened, whereupon cold water from the culvert 3 will again be circulated by the pump 6 through the condenser 2, and the plant will operate under normal conditions. (Eight claims.) 105281. A Tool for Enlarging Weber,. Hayingen (Lothringen), Germany. — This invention relates to a tool for enlarging a borehole to the form of a double conical chamber. For this purpose the cutting blades, serrated at their outer edges, are pivoted directly to the tool body at one end, and to a spherical piece at the other end, and are made each in two parts pivoted together, so that when the spherical end rests against the bottom of the borehole and per- cussion is applied to the tool, each two-part blade spreads itself in the manner of a toggle lever. The accom- panying drawing shows in axial sec- tion an example of the tool. It con- sists of a metal tube a, two blades 5, each made in two parts, the two blades being adapted to fold together and serrated on their outer edges, a spherical end &1, a head c for attach- ment to the hammer mechanism of a hammer drill, a compressed air admission glared d, and a duct e. This enlarging tool may be fitted to any hammer drill. When the tool is introduced into the bore, the blades are in the folded position shown in dotted lines, and they automatically resume this position when the tool is being withdrawn. The spherical end prevents the tool from penetrating the rock or ground, and ensures the spreading of the blades. The ser- rated edges of the blades disinte- grate the rock under the con- cussive and rotary action of the hammer, and enlarge the borehole to a chamber. The detritus may be blown from this chamber by compressed air admitted at d, and passing through tube a and duct e. (One claim.) 105268. Improvements in Internal Combustion Engines. B. Forsen, of Stevenson Hotel, Detroit, United States.— The invention relates to internal combustion engines, and more particularly to that type in which the ports are con- trolled by a sleeve valve arranged to slide between the piston and cylinder and a rotary valve or valves outside the cylinder bore, said valves so controlling a port or ports of the cylinder in co-operation that the sleeve valve seals- the high pressure (compression, explosion) strokes, while the other valve or valves control the low pressure (intake, Boreholes. W. /C rh - 7* ffj, ~G XL - ff H ilS exhaust) strokes when the first valve is open. The con- struction is simplified by utilising the rotary valve as an eccentric shaft for operating the reciprocating sleeve, to which it is connected by a rod or pitman. Fig. 1 is a vertical cross section through an engine provided with the improved valve construction; fig. 2 is a side elevation partly in longitudinal section. A is the cylinder of the engine, which may . be either single or of the multi- cylinder block type, B is the crank case, C are the pistons within the cylinders, and D is the reciprocatory sleeve which is arranged intermediate the piston and cylinder. At one side of the cylinder is arranged a valve case E con- taining a rotary valve F of the cylindrical type. The ports G. of this valve are adapted to alternately register with inlet and exhaust ports G1 and H and to connect the same with a port I, which is controlled by the sleeve D. The valve F is driven by any suitable drive mechanism, such as the spiral gears I1, vertical shaft J, and spiral gears K, which communicate movement of the crank shaft to the valve. The sleeve D is driven through the medium of the rotary valve, and to this end said valve is formed with eccentric grooves L therein forming eccentric bear- ing pins M, which are engaged by a bifurcated pitman rod N, the lower end of which extends into the crank case, and is pivotally connected at 0 to the sleeve D. These eccentric bearings are preferably arranged upon opposite sides of the ported portion of the valve as shown. The pins M being within the periphery of the body of the valve permit of inserting said valve endwise through the case E, and when in position the pitman is engaged there- with by providing split bearings N1 therefor. With the construction described the rotary valve is driven through the gears I1 and K and shaft J from the Crank shaft of the engine and the eccentric pins M. and the rods N com- municate reciprocatory movement to the sleeves D. All of the parts of the drive mechanism can be enclosed, and a form of manifold O1 is preferred for the inlet and exhaust integral with the cover plate P which encloses the cham- bers in which the rods N are located. (Three claims.) NEW PATENTS CONNECTED WITH THE COAL AND IRON TRADES. Applications for Patents. [Note.—Applications arranged alphabetically under the names of the applicants (communicators in parentheses). A new number will be given on acceptance, which will replace the application number.] (Acieries Reunies de Burbach-Eich-Dudelange Soc. Anon.). Smelting furnaces. (6498) Aldis. A. J. Turbine blade attachments. (6668) Baumann. K. Steam turbines. (6751) Beard, J. R. Stabilising self-excited direct-current dynamos. (6532) Bennis, A. W. Automatic stokers, etc. (6579) Bennis, A. W. Gas producers, etc. (6645) Bentley, F. S. Pulley for transmitting power. (6716) Birkigt, M- Means for driving a part by several engines coppled together. (6562) Boon, f. t>. Internal combustion engines. (6514) Boyd, D. Signalling apparatus for mines. (6779) Brayshaw, E. R. and S. N. Gas burners for metallur- gical, etc., furnaces. (6567) Buckingham, F. S. Internal combustion engines. (6533) Coatalen, L. Internal combustion engines. (6739) Crompton and Company. High frequency alternating current dynamos. (6508) Davy. Brothers. Steam hydraulic intensifiers. (6660, 6803) Dawson, H. M. Process for utilisation of nitre cake in corhbination with sulphuric acid for absorption of ammonia and isolation of ammonium sulphate and Glauber’s salt from resulting aqueous liquors. (6767) Dunlop, G. H. Excavating machines. (6795) Electrical Improvements Limited. Stabilising self-excited direct-current dynamos. (6532) Goodhead. B. Internal combustion engine. (6741) Green, W. H. Five-stroke internal combustion engine. (6624) Greenwood, J. Powder for extinguishing fire. (6702) Hand. T. W. Steam hydraulic intensifiers. (6660, 6803) Harvey, E. W. Mechanical feeders for gas producers, fur- naces, etc. (6626) Hathaway, D. J. Internal combustion engines of the two- stroke type. (6774) Hone, A. D. Process for decomposing silicon-bearing earths, rocks, minerals, and compounds. (6602) Kilburn, B. E. D. (Sulzer Freres Soc. Anon.). Locking devices for reversing gear of combustion engines. (6719) Moffat, D. Gas producers. (6485) Nobel’s Explosives Company. Explosives. (6481) Parsons Marine Steam Turbine Company. Turbine blade attachments. (6668) Paterson, R. H. Steam traps. (6612) Paton. J. Machines for pickling iron and steel plates, etc. (6765) Pensabene, N. High - frequency alternating - current dynamos. (6508) Plates, A. P. Pleitz-. Internal combustion engines. (6654) Poynder, H. B. Stabilising self-excited direct-current dynamos. (6532) Quain, .1. R. Electric furnaces. (6732) Rees, E. S. G. Centrifugal pumps, condensers, etc. (6492) Rintoul, W. Explosives. (6481) Robinson, M. Steam generators. (6776) Small, C. W. Internal combustion engine. (6741) Smith, P. H. Internal combustion engines. (6618) Stevens, H. C. M. Internal combustion engines. (6739) Stott, O. Internal combustion engines. (6771) Temmer, A. U-shaped superheaters. (6607) Thomas, J. Explosives. (6481) Thomas, J. G. Reversible parting for colliery and quarry tram roads, etc. (6516) Vickers. G. B. Internal combustion engines. (6618) Weihl, A. Waste heat boilers and superheaters. (6620) Wells, R. F. Aerial railways. (6557) Wood, C. C. Valveless rotary compressor or pump. (6772) Wood, H. N- Portable conveyors, etc. (6555) Wragge, W. J. Means of controlling lowering of loads. (6712) Wright, E. N. Mechanical feeders for gas producers, fur- naces, etc. (6626) Yates, H. J. Gas burners for metallurgical, etc., fur- names. (6567) Complete Specifications Accepted. (To be published on May 31.) 1915. 14166. Vereinig.te Dampfturbinen-Ges. Nozzle for steam turbines. 1916. [Note.—The number following the application is that which the specification will finally bear. ] 1713. Baumann, K. Steam turbines. (105933) 4716. Marshall, R. T. Means for promoting circulation in steam generators and the like. (105937) 4788. Chitty, H. Dynamo electric machines. (105942) 6231. Zweigbergk, G. von. Variable speed gear trains for the transmission of power. (105SJ54) 6255. Wilson, W. H. Electrical transformers. (105957) 6333. White, A. E. (Toledo Scale Company). Weighing and computing scales. (105967) 6348. Connolly, T. A., and Connolly, J. B. Rotary engines. (105968) 6393. London Electric Supply Corporation, and Fox, A. G. Automatic chain grate or other similar stokers. (105972) 6425. Morris, A. D. Metallic packings for piston and other rods. (105974) 6550. Nettle, W. E. Rock drilling machines. (105987) 6572. Porter, J. K., and Morris, H. F. Drilling of oil. water, and other wells, and apparatus therefor. (105989) 7160. Fox, C. R. Internal combustion engines. (106002) 13363. Deakin, F. B. (Roth, P., and Venturino, M. E.). Process and apparatus for transforming heavy petroleum products into lighter products. (106042) 13593. Landtmeters, J. C. Electric resistance furnaces. (106044) 13910. Rothwell,'J. H.. and Roberts, J. Miners’ safety lamps. (106045) l/SrO. Etablissements de Dion-Bouton Soc. Anon. Skips. ■ (103477) 1917. 4245: Kilburn, B. E. D. (Sulzer Freres Soc. Anon.). Apparatus for heating the fuel for combustion engines. (106076) 4262. Cotterill Limited, F. W., West, G. R., and Spencer, J. Liquid fuel furnaces. (106077) Complete Specifications Open to Public Inspection Before Acceptance. [Note.—The number following the application is that which the specification will finally bear.] 1916. 13428. Bostaph Engineering Company. Process of trans- forming mineral oils. (106080) 18295. Smith, C. H. Process of and apparatus for treat- ing coal'. (106084) 1917. 1964. Commercial Research Company. Production of explosive compositions. (106086) Eighty-Five Ton Coal Wagons.—The growth in size and carrying capacity of American goods wagons used in the -coal and ore or mineral traffic has been almost as specta- cular as that of the goods locomotives for similar traffic, and the latest development (observes The Engineer) is a steel hopper-bottom car having a carrying capacity of 85 tons, and weighing 30 tons empty. Its cubic capacity is 2,900 ■cu. ft. level full, or 3,228 cu. ft. with the contents heaped up in the usual way. The bottom is formed by five shallow hoppers, with doors hinged transversely of the car, and operated by chains from a drum or winch, to which a crank handle can be fitted. The car is 48 ft. 4 in. long over the headstocks, 46] ft. long inside, 10 ft. 2 in. wide overall, and 9 ft. 5 in. wide inside. The height is 10 ft. 6 in., while the depth of side is 7 ft. 3 in. From just inside the bogies the bottom slopes up to the ends, where the depth is about 3] ft. The sides and ends of the body are 3/,„in. plates. Each side has a bulb angle on the upper and a plain angle on the lower edge, and is stiffened by U-shaped verticals riveted to the plates. There are no sole plates, but a pair of steel channels forms a centre sill or backbone girder, and carries the end sills or headstocks. Diaphragms riveted to the centre sill and sides cause the latter to act as girders in carrying the load. These girders, in fact, carry the greater proportion of the load. The bogies have cast steel frames, with 36 in. steel wheels on a wheel base of 5 ft. lOin. The bogies are spaced 38 ft. 6 in. between centres. These cars are for the coal traffic of the Penn- sylvania Railroad, and the first lot has been built at the railway company’s works. --SIZES----- TO CARRY 3 and 5 TONS. With or Without Tipping Bodies. MANN’S STEAM CART & WAGON Co. Ltd., Huns/et, LEEDS. London Office : 9, Fenchurch Avenue, E.C.