IMPROVE- MENTS IN APPARATUS FOR SHAPING PARTS OF AUGERS
Year: 1878

page_text: LETTERS PATENT to Thomas Adam Mathieson, of Glasgow, in the County of
Lanark, North Britain, Tool Manufacturer, for the Invention of "IMPROVE-
MENTS IN APPARATUS FOR SHAPING PARTS OF AUGERS."
PROVISIONAL SPECIFICATION left by the said Thomas Adam Mathieson
at the Office of the Commissioners of Patents on the 30th October 1878.
THOMAS ADAM MATHIESON, of Glasgow, in the County of Lanark, North Britain,
Tool Manufacturer. "IMPROVEMENTS IN APPARATUS FOR SHAPING PARTS OF
AUGERS."
This Invention has for its object the combining of parts of apparatus in an
improved manner for the purpose of shaping parts of augers accurately and rapidly.
One part of the improved apparatus is designed for shaping the screw point or
leading screw of the auger and the adjacent end of the twisted part, and it
comprises parts arranged somewhat as in a turning lathe, there being a headstock
carrying two spindles which are driven by means of belts, and which are placed at
the same level and near together, so that the auger can be moved easily from one
to the other. The auger is held in a revolving chuck mounted in bearings on a
slide fitted so as to be movable across the shears or frame, and this movement of
the slide is regulated by adjustable pieces on it and on the frame, which adjustable
pieces also determine the positions of the auger when moved towards the tools
carried by the rotating spindles. On one of these spindles there is a milling tool
with a coned or conoidal circumference, and this tool, to which the auger is first
presented, gives the proper form to the point. Whilst being thus acted on by the
tool the auger is turned round by means of the chuck in which it is held, this
chuck being formed with spur teeth or having a spur wheel fixed to it, with which
there gears & pinion on a spindle to be turned by hand. Or automatic feed gear
may be applied to turn the chuck. When the operation of the first tool is
completed the slide carrying the chuck with the auger is moved across to put the
auger in a position to be operated on by the tool on the second rotating spindle.

page_text: This tool is of a general conical or conoidal contour, and is grooved round its
circumference so as to present a series of ring-like edges spaced to suit the pitch of
the screw thread to be formed on the auger point. On the chuck holding the auger
there is fixed a disc which can be changed for different forms and pitches of the
screw point, and which has a screw thread formed on its edge. This screw thread
engages with an internally screwed segment which is fixed to the framing, and
which, when the chuck is turned, causes the auger to travel along the cutting tool
at a relative rate and in a direction such that the cutting edges shape the screw
thread on the auger point in the desired manner.
A second part of the improved apparatus is designed to shape the outer edge of
the twisted part of the auger and the end or mouth thereof. This shaping is
effected by means of an emery wheel suitably carried on a slide rest fitted to a
framing provided with centres or holders to carry the auger. The slide rest carries
the emery wheel. in the direction of the length of the auger, and by means of a
cross slide on it the wheel is moved so as to be at a distance from the auger corre-
sponding to its intended diameter. Adjustable stops are fitted to the slides to cause
the grinding to stop short just before the mouth or end of the twist is reached, and
then to act on such mouth or end in a manner to leave it of a slightly larger
diameter.
A third part of the improved apparatus is designed for shaping the twisted
surface of the auger; and in it two adjustable emery discs or wheels are mounted
with their edges sufficiently close at one part to act simultaneously on both sides of
the twisted part of the auger, which is carried through on a slide rest; being
'mounted thereon so that it can turn and screw through between the emery. discs.
Or the emery wheels may be carried on a slide and the auger be held by stationary
framing.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Adam Mathieson in the Great Seal Patent Office on the
29th April 1879.
THOMAS ADAM MATHIESON, of Glasgow, in the County of Lanark, North Britain,
Tool Manufacturer. "IMPROVEMENTS IN APPARATUS FOR SHAPING, PARTS OF
AUGERS."
My said Invention has for its object the combining of parts of apparatus in an
improved manner for the purpose of shaping and finishing parts of augers accurately
and rapidly.
One part of my improved apparatus is designed for shaping the screw point or
leading screw of the auger and the adjacent end, and more particularly the lips of
the twisted part; and it comprises parts arranged somewhat as in a turning lathe,
there being a headstock carrying two spindles which are driven by belts, and which
are placed at the same level and near together so that the auger can be moved
easily from one to the other. The auger is held in a revolving chuck mounted in
bearings on a slide fitted so as to be movable across the shears or frame, and this
movement of the slide is regulated by adjustable angular pieces on it and on the
frame, which adjustable angular pieces also. determine the positions of the augèr
when moved towards the tools carried by the rotating spindles. On one of these
spindles there is a milling tool with a coned or conoidal circumference, and this
tool, to which the auger is first presented, gives the proper form to the point.
Whilst being thus acted on by the milling tool the auger is turned round by means
of the chuck in which it is held, this chuck being formed with spur teeth or having
a spur wheel fixed to it, with which there gears a pinion on a spindle to be turned
by hand. Or automatic feed gear may be applied to turn the chuck. When the
operation of the first tool is completed the slide carrying the chuck with the auger
is moved across to put the auger in a position to be operated on by the tool on the
second rotating spindle. This tool is of a general conical or conoidal contour, and
is grooved round its circumference so as to present a series of ring-like edges spaced
to suit the pitch of the screw thread to be formed on the auger point. On the
chuck holding the auger there is fixed a disc which can be changed for different
forms and pitches of the screw point, and which has a screw thread formed on its
edge. This screw thread engages with an internally screwed segment which is
fixed to the framing, and which, when the chuck is turned, causes the auger to
travel along the cutting tool at a relative rate and in a direction such that the
cutting edges shape the screw thread on the auger point in the desired manner.
A second part of my improved apparatus is designed to shape or finish the outer
edge of the twisted part of the auger and the end or mouth thereof. This shaping
is effected by means of an emery wheel suitably carried on a slide rest fitted to a
framing provided with centres or holders to carry the auger. The slide rest carries
the emery wheel in the direction of the length of the auger, and by means of a
cross slide on it the wheel is moved so as to be at a distance from the auger corre-
sponding to its intended diameter. Adjustable stops are fitted to the slides to cause
the grinding to stop short just before the mouth or end of the twist is roached, and
then to act on such mouth or end in a manner to leave it of a slightly larger
diameter.
A third part of my improved apparatus is designed for finishing the twisted
surface of the auger; and in it two adjustable emnery discs or wheels are mounted
with their edges sufficiently close at one part to act simultaneously on both concave
sides of the twisted part of the auger, which is carried through on a slide rest,
being mounted thereon so that it can turn and screw through between the emery
discs. Or the emery wheels may be carried on a slide and the auger be held by
stationary framing.
•

page_text: Having thus particularly described my said Invention, and the manner of per-
forming the same, I have to state that I do not restrict myself to the precise details
herein-before described, but that what I believe to be novel and original, and claim
as the Invention secured to me by and in terms of the herein-before in part recited
Letters Patent is,―
1. The combination comprising the two rotating tools which respectively give
the outer form and cut the thread of the leading screw or point of the auger,
together with the transversely moving slide and rotating chuck for holding the
auger, substantially as herein-before described.
2. The regulating of the different positions of the slide carrying the auger by
adjustable angular pieces, as herein-before described.
3. The tool herein-before described for cutting the screw thread on the auger
point combined with the screw-guiding details which regulate the movement of the
auger whilst being operated on by the said tool, as herein-before described.
4. The improved apparatus for shaping or finishing the outer edge of the twisted
part of the auger and the end or mouth thereof, as herein-before described.
5. The arrangement for leaving the end or mouth of the twisted part of the
auger of a slightly larger diameter than the rest of the twisted part, as herein-
before described.
6. The combination of two adjustable emery discs for acting on the concave sides
of the twisted part of the auger with the arrangement for carrying the auger with
a screwing motion between them, as herein-before described.
In witness whereof, I, the said Thomas Adam Mathieson, have hereunto set my
band and seal, this Twenty-fourth day of April, in the year of our Lord
One thousand eight hundred and seventy-nine.
Witness,
EDMUND HUNT,
Patent Agent,
Glasgow.
THOB. A. MATHIESON. (L.S.)