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Front page of
Scientific American
- New York, February 19, 1887
We illustrate a special drilling machine made by Francis
Berry & Sons, of Sowerby Bridge, England, thi s
machine having been specially arranged, says Engineering, for the use of manufacturers
of vertical and horizontal boilers, steam cranes, portable engines, etc.
As will be seen from the engraving, the machine consists of
three double-geared radial drilling machines, each with a radius
of 4 feet, each radial arm having a steel spindle 2 inches in
diameter and a self-acting and hand feed range for a depth of
12 inches. These drills are bolted to a cast iron wall plate 14
feet 6 inches long by 6 feet 3 inches wide, planed perfectly true,
and with six T slots, equidistant, planed out, and running from
end to end. This plate carries the three drills, and by means
of the T slots these drills can be moved into various positions,
either vertically or horizontally, within the limits of the plate,
to suit the work to be operated upon.
The top driving apparatus is also bolted, to a wall plate with
T slots from end to end, so that the driving apparatus can be
moved along to suit the varying position of the drills.
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