July 25.] THE NEW ZEALAND GAZETTE. 1545

oxide and magnesia, substantially as described. (7.) A support for osmium filaments composed of a sintered or fritted mixture of ten parts by weight of thorium-oxide and one part by weight of magnesia, substantially as described. (Specification, 3s. 6d.)

No. 13822.—18th July, 1901.—OSCAR PATRIC OSTERGREN, of Bedford Park, New York, United States of America, Engineer. Method of utilising the latent heat of the steam in steam-power apparatus.

Claims.—(1.) The method of utilising the latent heat of the exhaust steam of a steam-engine for useful effect in said engine, which consists in using air or other gaseous body together with steam as the motor fluid, condensing the spent steam and transferring the heat given up in the condensation of said spent steam to such gaseous body, and injecting said body into the boiler as a vehicle for returning said heat thereto for further useful effect of said body. (2.) The method of utilising the latent heat of the exhaust steam of a steam-engine for useful effect in said engine, which consists in using air or other gaseous body together with the steam as the motor fluid, condensing the spent steam, recooling and compressing the gaseous body separated from the condensed steam, and using it for effecting the condensation and for recovering the heat thereof, and returning said reheated gaseous body to the boiler for use together with the steam in the engine. (3.) In a latent-heat engine, the combination of a steam-generator, a motor engine, an air compressor and cooler, a pre-air-heater and steam-condenser intermediate of the motor engine and compressor on the one part and the generator on the other part, and means for introducing and mixing the air with the steam in the generator preparatory for use in the motor engine. (4.) In a latent-heat engine, the combination of a steam-generator, a motor engine, an isothermal air compressor and cooler, a pre-air-heater and steam-condenser intermediate of the motor engine and compressor on the one part and the generator on the other part, and means for introducing and mixing the air with the steam in the generator preparatory for use in the motor engine. (5.) In a latent-heat engine, the combination of a steam-generator, a motor engine, an air compressor and cooler, a pre-air-heater and steam-condenser intermediate of the motor engine and compressor on the one part and the generator on the other part, means for introducing and mixing the air with the steam in the generator, and a superheater for the mixed air and steam. (6.) In a latent-heat engine, the combination of a steam-generator, a motor engine, an air compressor and cooler, a pre-air-heater and steam-condenser intermediate of the motor engine and compressor on the one part and the generator on the other part, means for introducing and mixing the air with the steam in the generator, a superheater for the mixed air and steam, the pump for the compressor and cooler, and means for starting the motor engine by steam in advance of the supply of mixed air and steam. (7.) In a latent-heat engine, the combination of a steam-generator, a motor engine, an air compressor and cooler, a pre-air-heater and steam-condenser intermediate of the motor engine and compressor on the one part and the generator on the other part, and the air-heating coil in the steam-drum of the generator. (8.) In a latent-heat engine, the combination of a steam-generator, a motor engine, an air compressor and cooler, a pre-air-heater and steam-condenser intermediate of the motor and compressor-and-cooler on the one part and the generator on the other part, air-heating coil in the steam-drum of the generator, and the air- and steam-superheating coils in the steam-generator. (9.) In a latent-heat engine, the combination of a steam-generator, a motor engine, an air compressor and cooler, a pre-air-heater and steam-condenser intermediate of the motor engine and compressor on the one part and the generator on the other part, hot-well connected with the pre-heater, means for introducing the air and mixing it with the steam in the generator, and means for feeding the water of the hot-well into the generator. (10.) The combination of an engine and boiler, a source of relatively cool compressed air, and a condenser having independent passages, through one of which passes the engine-exhaust and through the other of which the compressed air passes on its way to the boiler in such a manner as to exchange temperatures and condense the exhaust steam, whereby the said air serves as a vehicle to return the latent heat given out by the condensation to the boiler. (Specification, 10s.; drawings, 1s.)

No. 13824.—18th July, 1901.—JOHN SINCLAIR, of 15, Ballast Point Road, Balmain, near Sydney, New South Wales, Marine Engineer. Improvements in screw propellers and appurtenances for the propulsion and steering of ships, parts of which are applicable to universal joints or shaft-couplings.

Claims.—(1.) A universally naved screw propeller, usable also as a joint or coupling, consisting essentially of a sphere or of a hub, preferably hollow, having driving-pins thereon, a divided nave surrounding said hub and having peripheral slots or recesses therein in which said driving-pins may have fore-and-aft motion, and a tail-bearing, substantially as described and explained. (2.) The combination with the main screw-shaft of a steamer of a universally naved propeller or joint or coupling so that the screw propeller may be set in a longitudinal plane at an angle other than a right angle to the water-line of said steamer, or, in other words, set with the axial line at an angle other than a right angle with the axial line of the screw-shaft, substantially as described and explained. (3.) The combination and arrangement of mechanical parts all together forming a universal nave or joint or shaft-coupling, substantially as described and explained, and as illustrated in Figs. 1, 2, 3, 4, 5, 6, and 7 of the drawings. (4.) The combination with a universally naved propeller or joint or shaft-coupling of a frame carrying loosely or fixed a tail-bearing, and having a post or shank in vertical line with the centre of said universally naved propeller or joint or shaft-coupling and adapted to give radial motion to the said tail-shaft, and the devices thereon, substantially as described and explained, and as illustrated in the drawings. (5.) The combination of mechanical parts for the purposes set forth, substantially as described and explained, and as illustrated in Figs. 8 and 11 of the drawings. (6.) The combination of mechanical parts for the purposes set forth, substantially as described and explained, and as illustrated in Fig. 9 of the drawings. (7.) The combination of mechanical parts for the purposes set forth, substantially as described and explained, and as illustrated in Fig. 10 of the drawings. (8.) The combination of mechanical parts for the purposes set forth, substantially as described and explained, and as illustrated in Fig. 12 of the drawings. (9.) The combination of mechanical parts for the purposes set forth, substantially as described and explained, and as illustrated in Fig. 13 of the drawings. (10.) The combination of mechanical parts for the purposes set forth, substantially as described and explained, and as illustrated in Figs. 14 and 15 of the drawings. (Specification, 12s.; drawings, 5s.)

No. 13825.—18th July, 1901.—EDWARD WATERS, Jun., a member of the firm of Edward Waters and Son, Patent Agents, of 414–418, Collins Street, Melbourne, Victoria (nominee of the Linotype Company, Limited, of 188, Fleet Street, London, England, the assignees of Philip Charles Lawless, of 188, Fleet Street, London aforesaid). Improvements in wipers for use in linotype machines.

Claims.—(1.) The combination with the metal-pot and the mould-wheel of a linotype machine, of a wiper for the mouth-piece of the said metal-pot, working within the circle of the mould-wheel and actuated in one direction by the motion through a certain arc of a stud on the said wheel, and in the other by the resilience of a spring that is generated by the said motion. (2.) The combination with the metal-pot and the mould-wheel of a linotype machine, of a wiper for the mouth-piece of the metal-pot, an arm radial to the axis of the mould-wheel and carrying the said wiper on its outer end, a spiral spring surrounding the bearing of the mould-wheel, fast by one end to a base independent of the rotary motion of the mould-wheel and having the said arm practically fast to its other end, a stud on the mould-wheel engaging the said arm to make the wiper wipe the mouth-piece, and means for disengaging the said arm from the stud after the mouth-piece has been wiped, and leaving it free to be returned to its original position by the resilience of the spring. (3.) The combination with the metal-pot and mould-wheel of a linotype machine, of a wiper for the mouth-piece of the metal-pot, an arm radial to the axis of the mould-wheel and carrying the said wiper on its outer end, a spiral spring surrounding the bearing of the mould-wheel, fast by one end to a base independent of the rotary motion of the mould-wheel and having the arm practically fast to its other end, a stud on the mould-wheel engaging the arm to make the wiper wipe the mouth-piece, and a cam-surface for disengaging the arm from the stud as soon as it has been wiped, and leaving it free to be returned to its original position by the resilience of the spring as soon as such wiping has been effected. (4.) The combination with the metal-pot and the mould-wheel of a linotype machine, of a wiper for the mouth-piece of metal-pot, an arm radial to the axis of the mould-wheel and carrying the said wiper on its outer end, a spiral spring surrounding the bearing of the mould-wheel eccentrically to the axis of it, fast by one end to a base independent of the rotary motion of the mould-wheel and having the said arm practically fast to its other end, a contact-piece adjustable lengthwise of the arm, and a stud on the mould-wheel to engage the said contact-piece to make the wiper wipe the mouth-piece, and to leave it free to be returned to its original position by the resilience of the spring as soon as such wiping has been effected. (5.) The combination with the metal-pot and the mould-wheel of a linotype machine,