An Improved Tool forttingtures.
Year: 1893

page_text: Date of Application, 29th Mar., 1893
Complete Specification Left, 29th Jan., 1894-Accepted, 10th Mar.,
1894
I, ROGER QUINN, of 1830 Tallow Street, Philadelphia, Pennsylvania, U.S.A
Inventor, do hereby declare the nature of this invention to be as follows:-
This my invention has reference to an improved tool for cutting tapering apertures
in metal or wood.
The improved tool consists of a head or body of round section and of convenient
length and adapted to be rotated in a lathe. The body has a longitudinally-
A rotatable screw is
extended recess therein with inclined bottom and side walls.
journalled in the end walls of said recess; said screw being inclined to said walls
A traveller is fitted on
and substantially parallel with the bottom of said recess.
the screw and a cutter is secured to the traveller. Said traveller has inclined walls
which fit closely in the recess.
בד
301
Manah 1902
W. H. MUNNS,
Applicant's Agent.
COMPLETE SPECIFICATION.
An Improved Tool for Cutting Tapering Apertures.
I ROGER QUINN of 1830 Tallow Street, Philadelphia Pa., U.S.A. Inventor,
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 :-
My invention consists of a tool for cutting tapering openings, formed as herein-
after set forth and claimed.
Fig. 1 represents a side elevation of a tool embodying my invention.
Fig. 2 represents a longitudinal section thereof.
Fig. 3 represents a transverse section thereof.
Fig. 4 represents an end view thereof.
Similar letters of reference indicate corresponding parts in the several figures.
Referring to the drawings:-A designates a head which is mounted on a suitable
In said head is a longitudinally
part of a lathe, and adapted to be rotated thereon.
extending recess B, in which is located a traveller C, to which is secured a cutter D,
said traveller being fitted on a rotatable screw E, which is journaled on the end walls
of the recess D, and extends obliquely through the head, as most clearly shown in
Fig. 2, the bottom of said recess being inclined and substantially parallel with said
screw. On the end of the screw is a toothed wheel F, which is adapted to be
engaged by a suitable tappet or projection on the lathe, so that on every revolution
of the head, the screw is caused to rotate on its axis independently of said head,
whereby motion is gradually imparted to the traveller toward one end of the head,
so that the sweep of the cutter D is gradually increased or decreased as the case
may be, it being seen that when the head is inserted in the opening of a piece of
metal cored or otherwise, and properly rotated and the screw D is likewise operated,
if the traveller is advancing say to the right, the cutter is gradually moved out
from the periphery of the head, so that its circle of motion gradually increases, and
it accordingly cuts the wall of the opening in tapering form beginning at the narrow
end of the taper. Should the traveller advance to the left, the circle described by

page_text: the cutter gradually decreases as it is carried toward the periphery of the head, its
action however being to cut the wall in tapering form, as in the previous case,
excepting that the work begins at the wide end.
The sides of the recess D, and of the traveller C, are inclined after the manner
of a dovetailed joint, whereby lateral strain of the traveller on the screw is relieved,
and said traveller is prevented from being improperly drawn out of the recess when
the tool is in operation. More than one cutter may be employed if so desired. It
will be noticed that when the tool or bit of the traveller bears against the bore of
the metal it is subjected to strain, and thus it is liable to be forced backward, and
as it may turn on the bottom of the passage as a fulcrum it may be wrenched out-
wardly and strain the screw, but the sides of said passage, owing to their dovetail
nature, overhang those of the traveller, and thus resist said outward strain on the
traveller and screw, the effect of which is evident.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
-claim is :-
The herein described tool for cutting tapering openings consisting of a head
adapted to be mounted and rotated on a lathe, and having a longitudinally-extending
recess therein with inclined bottom and side walls, as described, a rotatable screw
journally in the end walls of said recess, said screw being inclined to said walls and
substantially parallel with the bottom of said recess, a traveller on said screw, and
a cutter secured on said traveller, said traveller having inclined side walls
and fitting closely in said recess, said parts being combined substantially as
described.
Dated this 20th dow of Ton 1904