Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . ping Engine. Fig. 4038 illustrates an engine adapt-ed for either pumping or elevating pur-poses. For the latter, tiie crank isconnected by the detachalile pitman ato a bell-crank lever, whieli impartsa reciprocating motion to the piston-rod of the pump . In , a ropeb is wound or unwound on a windlassgeared to the engine. See also Steam-it m p. Pump-kett
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . ping Engine. Fig. 4038 illustrates an engine adapt-ed for either pumping or elevating pur-poses. For the latter, tiie crank isconnected by the detachalile pitman ato a bell-crank lever, whieli impartsa reciprocating motion to the piston-rod of the pump . In , a ropeb is wound or unwound on a windlassgeared to the engine. See also Steam-it m p. Pump-kettle. A convex perfo-rated diiijihragm placed at the bottomf>f a pump-tube to prevent the entranceof foreign matters. A strainer. Pump-lamp. One having a pump employed forforcing up oil to the wick. Used in that class oflamps in which the reservoir is too distant to permitthe oil to be drawn up by capillary attraction. Itmay be operated by hand or by clock-work mechan-ism, as in theCarcel lamp. See Meckaxical The reciprocating disk within. PUMP-SCRAPER. 1832 PUNCH. a <yliiider by which the Hiiid is expelli-ii. The e.\-ftiiiple is a pfuiijvr-iiislon having no opening through Fig. 4039. Fig. 4040. Fig. Pump-Piston. Pump-Bucket, Pump-Piston. it. Tlie leather which the cylinder is expanded by tile sub-caliber rubber disk when compressed by screwing down the upper disk. In Fig. 4041, the leathern cup re-ceives its shape and expansion froman elastic cylinder C. Fig. 4040 is a bucket. The exjiansible packing is composed of a ring of a soft substance, as leather or rubber, interposed between and Fig. 4042. protected by sectional rings of a hard . ^ substance, as metal or wood. The rings I : occupy a peripheral chamber of the W/. piston and expand together. f Fig. 4042 is for deep wells. The //. packing is kept tight by the pressure //, of tlie water inside the same. The ribs Ml (onstitute the cage of the valve, and 7/, penult tlie water to p
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