. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . It work to be done on it that have not heretofore been attempted on turret-head machines is built bv the Jones & Lamson Machine of Sprin{;fiehl, Vt. ,,?,,?, The usual form of turret and mountiiij? for the same has been entirely abandoned, and what maybe termed a turn-table is mounted upon what resembles the ordinary lathc-carrian:c. This carriare is fed by rack and jiinion withpilot-wheel in the ordinary manner
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . It work to be done on it that have not heretofore been attempted on turret-head machines is built bv the Jones & Lamson Machine of Sprin{;fiehl, Vt. ,,?,,?, The usual form of turret and mountiiij? for the same has been entirely abandoned, and what maybe termed a turn-table is mounted upon what resembles the ordinary lathc-carrian:c. This carriare is fed by rack and jiinion withpilot-wheel in the ordinary manner, or automati-c-ally, as may be desired, and the turret revolvesautomatically. The carriage slides on large 90°Vs, and is gibbcd to the V)ed outside front andback. The various tool-holders, turning de-vices, cut-off slides, etc., by which the work isdone, are simply attached to the top or uppersurface of the turret by square tongues andgrooves with bolts. The turret, which is pro-portionately much larger in diameter than usual,is gibbed all round its outer circumference, andthe locking-pin engages there. The cutting-tools do not extend out over the turret, but are. Fig. 20. CuL uil . Fig. 21.—Tool holder. usually about verticallv over the point of engagement of the locking-pin, a fact winch prac-tically relieves the central bearing of the turret of all stress during the cut. and enaljles thetool to be held more steadilv, other conditions being the same. There are six slots for asmanv tool-holders, and there is a separate stop for each one, which is adjustable independentlyof all the others, so that the point at which the feed will l)e automatically released, and themotion of the sliile positively arrested, may be independently fixed for each tool and opera-tion, instead of its being necessary to set all the tools but one to suit the point of mechanism is also arranged so that it can be made to act at the moment any toolclears the work, so tha
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
