Hollow Auger.
Year: 1894

page_text: Date of Application. 2nd July, 1894-Accepted, 6th Oct., 1894
COMPLETE SPECIFICATION.
Hollow Auger.
I, JAMES SWAN, of Seymour, Connecticut, United States of America,
Manufacturer, 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 relates to the class of hollow augers used in the cutting of round
tenons and similar work, and has for its object to simplify and strengthen the
construction and to greatly improve the operation in use.
With this object in view I have devised the simple and novel construction which
I will now describe referring by numbers to the accompanying drawings forming
part of this Specification in which,
Fig. 1 is a longitudinal section of my improved hollow auger on the line x, x,
in Fig. 2, the steadying dogs being removed.
Fig. 2 a front elevation thereof one of the cutters being removed to show the
face of the cutter slide, and
Fig. 3 is a section on the line y, y, in Fig. 2.
1 denotes the hollow spindle having formed integral therewith a face plate 2
which is provided with radial slots 3 to receive the cutter slides 4 and steadying
dogs 5. The face plate may be provided with any number of grooves, in the
present instance I have shown two cutter slides and two steadying dogs which of
course require four grooves in the face plate. The cutter slides and steadying
dogs are operated by means of a disk 6 which turns freely on the spindle and is
provided with a spiral groove 7. This groove is engaged by ribs, not shown on
the undersides of the cutter slides and steadying dogs so that rotation of the disk
will move the cutter slides and steadying dogs in or out as may be required.
8 denotes a locking ring which engages an interior screw thread on the spindle
back of disk 6. This ring when screwed up to place locks the disk and with it
the cutter slides and steadying dogs in any desired position after adjustment. As
these details of construction are identical in my present hollow auger with those
set forth and described in the expired Patent referred to, further description is not
thought to be required in this Specification.
Each of the cutter slides is provided with a downwardly and rearwardly
inclined slot 13 as clearly shown in Fig. 3, both ends and the front of said slot
being open as shown in Fig. 1.
Above this slot in each cutter slide is an inwardly extending arm 20 which is
made integral with the cutter slide itself and is provided with a shoulder 19, said
arm and shoulder forming a support and backing for the cutter so that strain is
entirely removed from the cutter in use.
9 denotes the cutters the cutting edges of which are bevelled on the under sides
as clearly shown and which extend over slots 13 as clearly shown in Figs. 1 and 3
but not closing the slots, there being ample space for the chips removed by the
cutters to pass away through slots 13. The rear ends of the cutters lie in
grooves 10 in the cutter slides and are locked in position in any suitable manner,
for example by means of plates 11 which rest upon the cutters and are secured to
the cutter slides by screws 12.
14 denotes a stop which I preferably use to limit the inward movement of the
piece of wood that is being operated upon. This stop is provided with a base 15
and a lug 16 which slides in a slot 17 in the hollow spindle. The stop is locked in
position after adjustment by a thumb screw 18 which engages the lug.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed. I declare that what
I claim is
In a hollow auger the combination with the hollow spindle and face plate, of
cutter slides each of which is provided with a downwardly and rearwardly inclined
slot 13 and over said slot with an inwardly extending arm 20 made integral with
the slide and provided with a shoulder 19, cutters the forward ends of which rest
upon said arms and bear against the shoulders so that strain is entirely removed
from the cutters in use, and plates 11 secured to the cutter slides by which the
cutters are held in place.
1
2
100