IMPROVEMENTS IN AND APPLICABLE TO APPARATUS FOR DRILLING OR CUTTING HOLES IN METAL
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by Robert Kent Jones at the Office of
the Commissioners of Patents on the 1st November 1883.
ROBERT KENT JONES of Birkenhead in the County of Chester Engineer,
"IMPROVEMENTS IN AND APPLICABLE TO APPARATUS FOR DRILLING OR CUTTING
HOLES IN METAL,"
The Invention relates first to improvements on and applicable to the tools or
apparatus for which British Letters Patent N° 2190 of the year 1883 were granted
to me, second to improvements applicable to drilling and boring apparatus as
hereinafter set forth and third; to new appliances for drilling or cutting holes
through metal plates.
First. In order to obtain rapid motion of the drill stock of double action ratchet
braces constructed under the above mentioned patent of 1883 when small holes are
to be drilled I make the said braces with an additional operating handle secured to
or forming part of what has been previously known as the retaining lever. When
motion is given at the same time to both handles the speed of rotation of the drill
stock is doubled.
Second. A further means for increasing the speed of rotation of the drill stock
in ratchet braces constructed under the suid invention consists in forming the loose
ratchet wheel with internal teeth and gearing the intermediate wheel or wheels
into a pinion on the drill stock
Third. When it is desired that the drill stock of my ratchet brace covered by
Patent No 219083 should have equal motion during the forward and backward
stroke of the operating lever or handle and it is not convenient to use wheels with
internal teeth, say in districts where repairs cannot be easily executed I constract
the ratchet wheels with crown teeth and place the intermediate wheel or wheels
between them.
Fourth. As further means for avoiding the use of internal toothed wheels I
construct the ratchet wheels with external teeth one of the said wheels being of
larger diameter than the other and connect them together by an intermediate and
idle pinion on a lever arm.
Fifth. I fit double action ratchet braces or braces in which the drill stock
receives forward motion during every stroke of the operating handle or handles

page_text: with a continuously acting friction feed, consisting essentially of an adjustable
strap acting on a feed nut or screw.
Sixth. I construct double acting ratchet braces under the above mentioned
patent of 1883 with a drill holder at each end of the stock so that holes may be
drilled or cut through plates on each side of a flue or through two flanges of a
girder at the same time.
Seventh. When it is desired to cut eliptical holes by means of the worm and
screw cutter set forth in the specification to the British Lettera Patent above
mentioned I fit the rotating sleevo with a movable tool carrier caused to move to
and fro during the rotation of the sleeve by means of suitable gearing.
Eighth. In order to obtain a portable drilling machine easily applicable for
drilling or cutting holes in fixed or movable metal articles I combine my improved
double action ratchet brace with a stand or frame adapted to be secured to or to
carry the object to be drilled.
Ninth. Where it is desired to punch and cut a number of holes rapidly through
metal plates and where punching is objected to. I construct a drill brace with a
differential screw and apply power directly to the drill stock to cause it to rotate
and be at the same time screwed forward with a positive feed.