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Description: |
| This patent was used by multiple drill press manufacturers."The invention consists mainly in belt gearing comprising step cone or multiple pulleys on the driving or driven shaft, or, preferably, on both, and intermediate pulleys or idlers and provisions for varying and determining the position thereof so that each step or pulley of one shaft may coöperate with any step or pulley on the other shaft, and the belt be properly guided tightened to transmit the rotary movement from one shaft to the other..." |
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