. American engineer and railroad journal . s a development in this constructionwhich will probably stand unique for sometime to come. Although the speed box mechanism is ofvery simple construction, which was in factthe feature particularly aimed at by the de-signers, the power is nevertheless such thatit will enable a 6 ft. American radial drillto pull an 8 in. pipe tap. A compound tum-bler gear is employed to obtain the speedchanges, and this in connection with fourgears on the cone provides 8 changes bymeans of only 7 gears. These changes, in connection withthe triple-geared head mechanism,
. American engineer and railroad journal . s a development in this constructionwhich will probably stand unique for sometime to come. Although the speed box mechanism is ofvery simple construction, which was in factthe feature particularly aimed at by the de-signers, the power is nevertheless such thatit will enable a 6 ft. American radial drillto pull an 8 in. pipe tap. A compound tum-bler gear is employed to obtain the speedchanges, and this in connection with fourgears on the cone provides 8 changes bymeans of only 7 gears. These changes, in connection withthe triple-geared head mechanism, makes provision for 24spindle speed. These speeds may be easily changed with-out shock to the driving mechanism, as the cone gears arekept rotating while changing speeds by means of an auxiliary The tumbler lever is located in its various positions by anotched plate, which prevents the gears from being improperlyengaged and also prevents the shifting of the tumbler lever untilthe auxiliary drive is thrown into operation. After the tumbler.
Size: 1699px × 1471px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
