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Title: |
1895 Article-D. E. Whiton Machine Co., Double Spindle Centering Machine |
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Source: |
Modern Mechanism 1895 pg 115 |
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Insert Date: |
6/8/2011 2:41:19 PM |
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A new double-spindle centering machine, made by the D. E. Whiton Machine Co., New London. Conn., is shown in Fig 1. Two spindles are provided, one of which carries a drill, and the other a reamer or countersink. They are driven at different speeds, by a single belt, over a pulley whose center is in line with the center of the lateral movement of the head. Both spindles are balanced by springs as in sensitive drills, and are successively advanced to their respective cuts by a feeding-lever. The machine is so arranged that neither spindle can be advanced by the feeding-lever except at the central point. The moment this advance is begun no lateral movement of the head is possible, nor is lateral movement again possible until the return of the spindle to its normal withdrawn position. A support is provided for the front end of the bar while it is being inserted in the chuck, in addition to the V-shaped rest for the rear end. The chuck is thereby made self-centering. |
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1895 D. E. Whiton Machine Co., Double Spindle Centering Machine
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