Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . now find two numbers which, multiplied together, make 5, as 2^ x 2 = 5; hence one pair of wheelsmust be geared 2\ to 1 and the other pair 2 to 1, the small wheel of each pair being used as drivers,because the thread required is finer than the feed-screw. 240 LATHE, METAL-WORKING. ;s Weighted Engine- Lathe. — InFig. 2587 is shown a back view ofthe Pratt A: Whitney Companys(of Hartford, Conn.) weighted en-gine-lathe. In this class of lathethe lower part of the slide-rest,term
Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . now find two numbers which, multiplied together, make 5, as 2^ x 2 = 5; hence one pair of wheelsmust be geared 2\ to 1 and the other pair 2 to 1, the small wheel of each pair being used as drivers,because the thread required is finer than the feed-screw. 240 LATHE, METAL-WORKING. ;s Weighted Engine- Lathe. — InFig. 2587 is shown a back view ofthe Pratt A: Whitney Companys(of Hartford, Conn.) weighted en-gine-lathe. In this class of lathethe lower part of the slide-rest,termed the carriage, is kept downto the guide Vs by the weight shown suspended beneath thelathe-bed. This lathe is providedwith Slates patent taper-turningattachment. This is constructedas follows: At the baek of thelathe-bed are three backets, shownat E in the plan view of the at-tachment in Fig. ^588. Thesebrackets support an adjustable bar^4. The centre bracket receives a pivot C, which the bar A swing-, while the end brackets affordmeans of fixing the bar in its adjusted position. D is a thumb-screw for effecting the final adjust- 25!i0. £« ;Q< C ? f
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Keywords: ., bookauthorbenjaminpark18491922, bookcentury1800, bookdecade1880
