. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . uns in self-oiling bearings in a cylinder frame which is raised and lowered by ahand wheel. A weighted pressure bar is placed before tiie cut, as is also a pressure rollersupplied with springs which give an elastic tension, that is controlled by a screw and handwheel, so as to give any desired pressure. The cylinder frame carrying the cutters is gibbedto the sides. The cylinder and pressure bar adjust simultaneously
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . uns in self-oiling bearings in a cylinder frame which is raised and lowered by ahand wheel. A weighted pressure bar is placed before tiie cut, as is also a pressure rollersupplied with springs which give an elastic tension, that is controlled by a screw and handwheel, so as to give any desired pressure. The cylinder frame carrying the cutters is gibbedto the sides. The cylinder and pressure bar adjust simultaneously to the tiiickness of cut, bya single movement of tiie hand wheel. Tiie feed is started and stopped by a binding development of this machine, of much heavier build, for i)laning-mills, bridge work, etc.,has a stationary cylinder so tliat the countershaft may be either on the floor or overhead, asdesired. There is a chip-breaker for holding the fibre of the wood during tiie process of cut-ting, and a pressure roller in front weiglited with folding levers so arranged that either endwill work independently of the other, which is desirable on uneveidy sawed lumber. This. -JSB^SS Fig. 5.—Endless-bed eiirface planer. allows the rollers to adjust to the different thicknesses of the lumber without unduly strain-ing any of the parts of the machine. The machine shown in Fig. 5 has the line of the bed in a fixeil position, the upper andthe lower cylinders, and the pressure bar over the latter, adjusting simultaneously to suit thethickness of the timber. The upper cylinder carries four an<l the lower one three knives,and either can be raised or lowered when running. The pressure bar over the lower cylinderis hinged, and can be swung back out of the way to give free access to the cutters. There isa set of heavy delivery rollers after the lower cylinder, driven by expansion gearing, andfeeding the lumber away from the machine, thus relieving the strain on the travelling bedin fe
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
