Mechanics' magazine and register of inventions and improvements . .—Institution ofCivil. Engineers, April 3.—In the case of thesahne deposition, which accumulates in boil-ers during sea-voyages, it was mentioned asthe usual practice merely to blow oflf a por-tion of water from the boiler, according as itbecomes saturated. In short voyages ofthree or four days, this is found sufficient forthe purpose ; but for vessels crossing theAtlantic, or on other long voyages, a moreefficient plan has been resorted to, by attach,ing an apparatus to the engine which pumpsout brine from the bottom of the boi
Mechanics' magazine and register of inventions and improvements . .—Institution ofCivil. Engineers, April 3.—In the case of thesahne deposition, which accumulates in boil-ers during sea-voyages, it was mentioned asthe usual practice merely to blow oflf a por-tion of water from the boiler, according as itbecomes saturated. In short voyages ofthree or four days, this is found sufficient forthe purpose ; but for vessels crossing theAtlantic, or on other long voyages, a moreefficient plan has been resorted to, by attach,ing an apparatus to the engine which pumpsout brine from the bottom of the boiler, atthe same time throwing in a quantity of clearwater equal to what is abstracted. The of saturation is indicated by means ofan attached thermometer ; 218 degrees the boiling point of clean sea water ina steam engine boiler, a range is allowedfrom that to 227 degrees, which marks thelimit of saturation admissible for a steamboiler to be worked with safety.—[Ath,^ A Machine uniting all the Mechanical Powers.—Decimal Fi ac*tont. 329. A Machine in which all the Mbchan-ICAI. Powers are united.—The precedingfigure represents a machine in which all thesimple mechanical powers are combined. It consists of a frame A B C D, fastenedupon the stand O o by the nut o, and kept to-gether by the pillars V W and B q. Thepiece E F is first fitted to the frame, havingtranes, E F, which may be either moved bythe wind, or by a cord fastened at F. Thispart represents the lever, whose fulcrum isG. A perpendicular axis G A is joined tothis lever, and carries the endless screw H,which may be considered as a wedge. Thisendless screw works in the teeth of thewheel K, which is the wheel and axle ; andwhen K is turned round, it winds upon theaxle I L the cord L M, which, passing roundthe tackle of pulleys M N, raises the weightP. In order to include the inclined plane inthis combination, we must add the planeR Q r ^r, and make it rest on the ground atQ, R, and on the pilla
Size: 1395px × 1792px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectindustrialart, booksubjecttechnology
