SEPT. 28. THE NEW ZEALAND GAZETTE. 1859

which consists in floating the solvent to the top of the digester or precipitating it to the bottom of said digester by the introduction of water or aqueous solutions, then eliminating the solvent from the surface of the water or aqueous solutions or from the bottom of the digester, then removing the potash or potash-salts from the wool, and then steaming it, substantially as described. (44.) The method of removing residual solvent from wool which consists in removing the bulk of the residual solvent from the wool by pressure, then floating the solvent to the top of the digester or precipitating it to the bottom of said digester by the introduction of water or aqueous solutions, then eliminating the solvent from the surface of the water or aqueous solutions or from the bottom of the digester, then removing the potash or potash-salts from the wool, and then steaming it, substantially as described. (45.) The method of removing residual solvent from wool which consists in separating the solvent from the wool by the introduction of water or aqueous solutions, hot or cold, into the vessel containing the wool, then separating the stratified solvent from the water or aqueous solutions, then repassing water or aqueous solutions through the wool, substantially as described. (46.) An apparatus for cleaning wool consisting of a digester, a solvent-tank, a settling- or separating-tank, a surface condenser, a heater or superheater, and a vacuum- or circulating-pump, substantially as described. (47.) An apparatus for cleaning wool consisting of a digester, a solvent-tank, a settling- or separating-tank, a surface condenser, an oil condenser, and a vacuum- or circulating-pump, substantially as described. (48.) A digester, for use in wool-cleaning, provided with an hydraulic piston or ram adapted for the expression of liquids from the material under treatment, substantially as described. (49.) A digester, for use in wool-cleaning, provided with an hydraulic piston or ram, having a foraminous platen attached thereto, and adapted for the expression of liquids from the material under treatment, substantially as described. (50.) A digester for use in wool-cleaning, having an enlarged chamber at its top provided with coils, substantially as described. (51.) A digester for use in wool-cleaning having an enlarged chamber at its top provided with coils, and a similar chamber at its bottom provided with coils, substantially as described. (52.) A digester having an enlarged chamber at its bottom provided with coils, and a foraminous platen adapted to compress the material under treatment, substantially as described. (53.) A digester having an enlarged upper portion forming a chamber, heating-coils therein, and a foraminous false bottom adapted to be operated to compress the material under treatment, substantially as described. (54.) A digester having an enlarged chamber at its bottom provided with coils, a perforated false bottom or platen adapted to compress the material under treatment, and a cover provided with a depending foraminous chamber, substantially as described. (55.) A digester with enlarged upper and lower portions forming chambers exterior to the main body of the digester, coils in said chamber, and means for compressing the material under treatment, substantially as described.
(Specification, £1 6s.; drawings, 8s.)

No. 12001.—20th September, 1899.—WILLIAM ERNEST HUGHES, of Queen’s Chambers, Wellington, New Zealand, Patent Agent (nominee of Henry James Kinman and Edward Nash Hurley, of the Marquette Buildings, Chicago, Illinois, United States of America, Engineers). Improvements in portable pneumatic drills and like tools.

Claims.—(1.) In a portable pneumatic drilling-machine, the combination of at least two sets of fluid-pressure cylinders, having at least two cylinders in each set arranged substantially parallel with the cylinders in the adjacent set, a reciprocating-piston in each cylinder, a crank-shaft connected with each piston, a controlling reciprocating-valve arranged for each set of parallel arranged cylinders, arranged parallel therewith, and connected with the crank-shaft to admit and exhaust fluid-pressure in each line of parallel-arranged cylinders, and drill-holding mechanism connected with and adapted to be rotated by the crank-shaft, substantially as described. (2.) In a portable pneumatic drilling-machine, the combination of a casing provided with two sets of fluid-pressure cylinders arranged in parallel lines and having at least two cylinders in each set, arranged substantially at right angles with the other cylinder in the set, a reciprocating-piston in each cylinder, a rotating crank-shaft connected with the piston in each cylinder, a controlling-valve for each line of parallel-arranged cylinders, and arranged parallel therewith to cut off fluid-pressure from and admit it to each cylinder in the line of parallel-arranged cylinders, and drill-holding mechanism connected with and adapted to be rotated by the crank-shaft, substantially as described. (3.) In a portable pneumatic drilling-machine, the combination of a casing, provided with two sets of fluid-pressure cylinders, arranged in parallel lines having at least two cylinders in each set substantially at right angles with each other, a reciprocating-piston in each cylinder, a crank-shaft provided with a crank arranged opposite each set of cylinders, and connected with the pistons in the cylinders of each set, a controlling piston-valve arranged parallel with and for each line of parallel-arranged cylinders, and connected with the crank-shaft to be operated thereby, provided with annular and longitudinal passages to regulate the admission and exhaust of the fluid-pressure during the motions of the controlling-valve to and from each line of parallel-arranged cylinders and drill-holding mechanism connected with and adapted to be rotated by the crank-shaft, substantially as described. (4.) In a portable pneumatic drilling-machine, the combination of a casing provided with at least two sets of fluid-pressure cylinders arranged in parallel lines having two cylinders in each set substantially at right angles with each other, a reciprocating-piston in each cylinder, a crank-shaft provided with a crank arranged opposite each set of cylinders and connected with the movable pistons therein, a valve-casing forming a cap for the cylinder-casing, and provided with a fluid-pressure chamber and valve-chambers arranged at right angles to each other, one for each line of parallel-arranged cylinders, a reciprocating piston-valve in each valve-chamber connected with the crank-shaft and provided with annular and longitudinal passages or chambers, channels leading from each valve-chamber to each cylinder in the line of parallel-arranged cylinders so as to provide for and cut off communication with the fluid-pressure chamber and each cylinder in the set during the reciprocation of the controlling piston-valve, and drill-holding mechanism connected with and adapted to be rotated by the crank-shaft, substantially as described. (5.) In a portable pneumatic drilling-machine, the combination of a casing provided with at least two sets of fluid-pressure cylinders arranged in parallel lines, having two cylinders in each set substantially at right angles with each other, a reciprocating-piston in each cylinder, a crank-shaft provided with a crank arranged opposite each set of cylinders and connected with the movable pistons therein, a valve-casing forming a cap for the cylinder-casing and provided with a fluid-pressure chamber and valve-chambers arranged at right angles to each other, one for each line of parallel-arranged cylinders, a reciprocating piston-valve in each valve-chamber connected with the crank-shaft and provided with annular and longitudinal passages or chambers, channels leading from each valve-chamber to each cylinder in the line of parallel-arranged cylinders, so as to provide for and cut off communication with the fluid-pressure chamber of the valve-casing and each cylinder in the set during the reciprocations of the controlling piston-valve, a cap for each valve-chamber provided with an opening through which fluid-pressure may be exhausted, and drill-holding mechanism connected with and adapted to be rotated by the crank-shaft, substantially as described. (6.) In a machine of the class described, a supply-pipe provided with a rotary throttle-valve in which there is combined a supply-pipe, an inwardly axial projecting tubular extension thereof perforated and immovably connected therewith so as to provide an annular chamber between it and the supply-pipe, a rotary valve in the inwardly extending portion provided with a perforation adapted to register with the perforation in the extension, and a rotatable shell or handle portion surrounding the supply-pipe and extension thereof and connected with the valve so as to rotate both of such parts simultaneously, substantially as described. (7.) In a portable pneumatic drill, the combination of a rotatable sleeve having a tapered recess adapted to receive the shank of a drill or similar tool, fluid-pressure cylinders and intermediate mechanism adapted to transform the energy in such cylinders into rotations of the tool-holder, a tubular extension on such tool-holder provided with an internally threaded and axial opening, a movable pin in such opening, and a threaded plug adapted to operate the pin backwardly and forwardly, substantially as described.
(Specification, 10s.; drawings, £1 1s.)

No. 12002.—20th September, 1899.—EDWARD WATERS, Jun., a member of the firm of Edward Waters and Son, of 131, William Street, Melbourne, Victoria, Patent Agent (nominee of George Westinghouse and Edwin Ruud, both of Pittsburg, Pennsylvania, United States of America). Improvements in internal-combustion engines.

Claims.—(1.) The combination with a cylinder and a piston of a chamber or cavity in the piston and means for supplying a cooling-fluid to the interior of the piston. (2.) The combination of a cylinder-jacket, a hollow piston,