Improvements introduced in threaded boxes and advances for the machining of different steps of threads. (Machine-translation by Google Translate, not legally binding)

摘要

Improvements introduced in the boxes of threads and advances for the machining of various threads, characterized by the box with its corresponding lid, inside it is divided into two compartments being housed in the first of them gear advance and multiplication the threads from 0.25 to 8 with a multiplication by two and in which are the lower input shaft for the set in motion of all the gears of the box, the intermediate shaft and the ribbed upper shaft, mounted all them on bearing; balls, sliding on the ribbed or input shaft a pair of gears, which and by means of a lever and shoe mesh with two other gears of the four that are keyed on the intermediate shaft, rotating two of them plus one of those previously mentioned with a trio of sliding gears mounted on the upper ribbed axis, achieving with these nine gears a range or multiplication by two from 0.25 to 8. (Machine-translation by Google Translate, not legally binding)