By dispensing with a tail stock a much shorter
bed may be used, and the hollow driving spindle enables any length shaft
to be turned, with one setting of the tools. The tool rest is so arranged
as to allow of perfect lubrication of the tools, keeping the shaft cool,
and at the same time holding it perfectly rigid and strong; the operator
is not required to travel the length of the bed, but remains near the
driving belt, feed gearing, etc. Power is communicated to the driving
spindle by means of a sliding pinion on a splined rod inside the bed, the
driving belt and gears being at the end.
The driving head, after having traveled the length of the bed and turned a
shaft, is returned by a quick feed, and stops automatically, allowing
nearly time enough for the operator to grind tools and be ready with
another shaft, thus economizing the time completely.
Wood, Jennison & Co., Worcester, Mass., are the makers, and they say that
with a good quality of iron they have turned three hundred feet of two
inch iron in ten hours.
* * * * *
POWER STRAIGHTENING MACHINE.
The machine is provided with a pair of rolls at each end of the bed, which
are adjustable for different lengths of shaft, and are made to revolve by
power applied through suitable gearing and a splined rod inside the bed;
the bar of iron being placed on the periphery of the rolls receives a
rotary motion by friction, and shows the crooked places in the same way
and with the same ease as though rotating on centers in the usual manner;
vertically adjustable blocks are arranged in the base of the press to
support the iron; power is applied by means of gearing to a splined rod at
the back of the machine, on which is a sliding clutch connecting, at the
will of the operator, with an eccentric; the eccentric conveys motion and
power through a link to the elbow joint at the front of the press, which
forces a plunger down against the iron.
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