IMPROVEMENTS IN APPARATUS FOR CUTTING ELLIPTICAL HOLES IN METAL
Year: 1885

page_text: I ROBERT KENT JONES of 5 Ridley Street Birkenhead in the County of Chester
Engineers tool maker, do hereby declare the nature of the said invention for
IMPROVEMENTS IN APPARATUS FOR CUTTING ELLIPTICAL HOLES IN METAL, to be
as follows:
The object is to provide efficient apparatus for cutting with facility elliptical
holes in metal.
The main feature of the invention consists in constructing the apparatus in such
way that the cutters shall have an oscillating as well as a to and fro motion so
that they shall always face the cut.
In carrying my invention into practice I employ a central spindle and fit around
the said spindle a tool carrier free to revolve and slide thereon and a toothed or
gear wheel free to slide only. On the said tool carrier I fit one or more wheels
which gear with the wheel on the central spindle and give motion to crank discs.
The said crank discs are provided with crank pins made adjustable so that the
throw may be varied. Connecting rods couple the said crank pins with toothed
quadrants free to slide in or on guides formed with or attached to the tool carrier.
Gearing with and coupled to the said quadrants are tool boxes free to slide and
Oscillate-Driving and feed motions whether ratchet screw power or hand are
provided to suit circumstances, and are connected to the tool holder in any
convenient way.
The action is as follows: The central spindle is bolted or otherwise secured to
the work to be operated on. The throw of the crank pins is adjusted to the
excentricity required and rotary motion is given to the tool holder. The wheels on
the tool holder in gear with the stationary wheel revolve round it and give to and
fro motion to the tool boxes by means of the crank pins and connecting rods whilst
an oscillating motion is communicated to the said tool boxes by means of the
toothed quadrants. The tool carrier is fed forward as required.
It will be obvious that various systems of gearing may be adapted to give
oscillating motion to the tool boxes.
Dated the third 1...
TL

page_text: I ROBERT KENT JONES of Birkenhead in the County of Chester Engineer do
hereby declare the nature of this invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
The object is to provide efficient apparatus for cutting with facility elliptical &
holes in metal.
The main feature of the invention consists in constructing the apparatus in such
way that the cutters shall have an oscillating as well as a motion nearer to and
further from the centre of rotation so that they shall always face the cut.
Fig. 1 is a vertical section and Fig. 2 a horizontal section of apparatus con-
structed to operate in accordance with my invention a is a central spindle made.
with a flange b by means of which it is bolted or otherwise secured in position-
on the said spindle I fit a tool carrier c which is free both to revolve around, and to
move along or slide on the said tool carrier Between the said tool carrier and the
spindle is a sleeve d attached at one end to a nut e which takes into a worm on
the said spindle a. The other end of the sleeve d carries a double nut f by which
it is secured to the carrier c, g is a hand wheel attached to the nut e, his a
toothed wheel fitting around the spindle a and held in position by the clips i
attached to the carrier c The said wheel is free to slide on the spindle a but is
prevented from turning thereon by the key and way j, k toothed wheel gearing
into the toothed wheel and carried on one end of the spindle L, The spindle is
free to revolve in bearings on the carrier c, and is formed with the slotted crank
disc m,
n crank pin and securing bolt and nut, o connecting rod and adjusting
screws coupling the crank pin n with the toothed piece or quadrant p. The.
toothed piece p is pivotted at q to the sliding block on the carrier c The tooth
on the piece p takes into a recess in the tool box s which is also pivotted on the
sliding block r, t tool, u toothed wheel gearing into the wheel h, and carried by
the spindle on the arm w. The spindle v also carries a toothed wheel x which
gears into a toothed wheel y on the nut e.
It will be evident that two sets of tool gearing may be on the same carrier at
opposite sides and that the toothed quadrant may have more than one tooth or
that a link may be substituted therefor.
The action of the apparatus is as follows
The central spindle a is bolted or otherwise secured to the work to be operated
on. The throw of the crank pin n is adjusted to the excentricity required and the
sliding block is regulated by means of the nuts o so that the tool t is the
requisite distance from the central spindle Motion is given to the tool holder and
tool around the spindle a by means of a dog or other suitable connection between
the arm w and a rotating shaft The wheel revolves around the wheel h and
gives motion to the crank disc m and pin n, thence by the connecting rod o to the
sliding block and tool t, at the same time the toothed quadrant gives an
oscillating motion to the tool The toothed wheel u also revolves round the

page_text: toothed wheel and actuates the nut e so as to feed forward the tool carrier and
tool,
It will be obvious that various systems of feed motion driving gear and for
gear
giving oscillating motion to the tools may be adopted.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
First. Apparatus for cutting elliptical holes in metal in which the cutting tool
has an oscillating motion as well as motion nearer to and further from the centre
of rotation for the purpose set forth.
Second. Apparatus for cutting elliptical holes in metal constructed substantially
as set forth.
Third. In apparatus for cutting elliptical holes in metal providing means for
giving oscillating motion to the tool for the purpose set forth.
100-
J. T. KING,
Per J. Richman,
Agent for the Applicant,