US38119A - Improvement in drill-bits - Google Patents
Improvement in drill-bits Download PDFInfo
- Publication number
- US38119A US38119A US38119DA US38119A US 38119 A US38119 A US 38119A US 38119D A US38119D A US 38119DA US 38119 A US38119 A US 38119A
- Authority
- US
- United States
- Prior art keywords
- drill
- groove
- edge
- improvement
- bits
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002184 metal Substances 0.000 description 12
- 210000000088 Lip Anatomy 0.000 description 6
- 240000001973 Ficus microcarpa Species 0.000 description 2
- 241000283220 Odobenus rosmarus Species 0.000 description 2
- 240000001439 Opuntia Species 0.000 description 2
- 230000001154 acute Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000003467 diminishing Effects 0.000 description 2
- 230000000717 retained Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/909—Having peripherally spaced cutting edges
- Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel
- Y10T408/9097—Spiral channel
Definitions
- Figure I is a front view of the drill.
- Fig. II is a View of the end of the drill.
- Fig. III is a section on the line A B, Fig. I.
- Fig. IV is a section of one of the grooves on the line C D, Fig. l.
- Fig. V shows the shape of the bottom of the drill.
- the object of my improvement in twist drills is to secure a sharp and straight cutting-edge, presented to the me'tal at a suitable angle and having such a form of the groove, when seen in cross section, as will produce the straight cutting-edge when the drill is ground at the ordinary angle.
- the common drill scrapes the metal that is to be drilled, while my drill cuts the metal and discharges the chips and borings without clogging.
- V the cutting-edges of the double groove are represented at J and J
- the periphery on opposite sides of the drill is seen at K K', while the curves L L are of such a shape as to allow as large a mass of metal as possible in the direction of the dotted lines S J and S J for the purpose of giving a strong support to the cutting-edges which revolve in the direction of the arrow.
- the cutting-edges J J form nearly a straightline, and just back of the edge the curvature of the grooves F and H is such as to form an acute angle, instead of a right angle, as in the common twist-drill.
- the peculiar shape of the groove is retained throughout its whole length, and as the drill is gradually shortened by grinding the shape of the cutting-edge remains unchanged.
- a drill made in the manner herein described will make a perfectly straighthole. It willnot diverge from its course while passing through blow holes or soft and hard places. The edge actually cuts the metal, thus diminishing the friction and wear of the edge. The borings or chips are discharged freely, and the edge is strongest at the periphery, where the strain is greatest.
- a twistdrill in which the spiral grooves are so cut or formed that the curvature of that side of the groove which makes the cuttinged ge is very nearly in the direction ot the radius, and when the drill is ground at the ordinary angle presents a straight and acuteangled edge or lip to the metal or other substance that is to be drilled.
- the incrcasin g twist to facilitate the discharge of the borings or chips.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Description
No. 38,119. Patemed Apg. 7. 1863. Y
UNITED STATES PATENT OFFICE.
IMPROVEMENT IN DRILL-BITS.
Specication forming part of Letters Patent No. 38,119, dated April 7, 1863.
To all whom. it may concern.-
Be it known that I, STEPHEN AMBRosE MORSE, of East Bridgewater, in the county of Plymouth and State of Massachusetts, have invented `a new and useful Improvement in Drills 5 and I do hereby declare that the following is a full and exact description of the construction and use of the same, reference being had to the accompanying drawings, and to the letters and figures marked thereon.
Figure I is a front view of the drill. Fig. II is a View of the end of the drill. Fig. III is a section on the line A B, Fig. I. Fig. IV is a section of one of the grooves on the line C D, Fig. l. Fig. V shows the shape of the bottom of the drill.
The object of my improvement in twist drills is to secure a sharp and straight cutting-edge, presented to the me'tal at a suitable angle and having such a form of the groove, when seen in cross section, as will produce the straight cutting-edge when the drill is ground at the ordinary angle.
The common drill scrapes the metal that is to be drilled, while my drill cuts the metal and discharges the chips and borings without clogging.
l'he drill is made, by the use of revolving cutters or burrs, from a solid cylindrical rod, E F G, Fig. I, and when in use is held by the upper part, E F. Thclower part, F G, hasa double spiral groove, P H, cut upon it, the
Vgeneral appearance of which resembles those in common use, but the difference consists in this, that the section of the groove at any point throughout its length, as at G D, is nearly of the form shown in Fig. IV, the right side ofthe groove being a short, quick curve, and nearly in the direction of the radius, while the left or Vopposite side of the groove is a longer or more shallow curve. The form of the end of the drill when ground is shown in Fig. II, the direction of the cutting edges or lips being shown by the parallel lines I Q. In Fig. V the cutting-edges of the double groove are represented at J and J The periphery on opposite sides of the drill is seen at K K', while the curves L L are of such a shape as to allow as large a mass of metal as possible in the direction of the dotted lines S J and S J for the purpose of giving a strong support to the cutting-edges which revolve in the direction of the arrow.
When the drill is ground, which should be at about the angle represented in Fig. I, the cutting-edges J J form nearly a straightline, and just back of the edge the curvature of the grooves F and H is such as to form an acute angle, instead of a right angle, as in the common twist-drill. The peculiar shape of the groove is retained throughout its whole length, and as the drill is gradually shortened by grinding the shape of the cutting-edge remains unchanged.
From the above description it will be perceived that I have produced a twistdrill, having an acutefangled edge extending in the direction of the radius and strengthened by the mass of metal in the rear of the edge or lip.
I make the spiral grooves with an increasing twistthat is to say, the distance from one spiral to another in the direction of the axis is greater at the upper part of the drill than it is near the point, as shown in Fig. I, the space between the lines O and N being greater than it is between N and M. This increasing twist enla-rges the space in which the borings are received, and they traverse the groove more nearly in aline with the axis, and consequently with less friction.
A drill made in the manner herein described will make a perfectly straighthole. It willnot diverge from its course while passing through blow holes or soft and hard places. The edge actually cuts the metal, thus diminishing the friction and wear of the edge. The borings or chips are discharged freely, and the edge is strongest at the periphery, where the strain is greatest.
What I claim, and' desire to secure by Letters Patent, is
1. A twistdrill, in which the spiral grooves are so cut or formed that the curvature of that side of the groove which makes the cuttinged ge is very nearly in the direction ot the radius, and when the drill is ground at the ordinary angle presents a straight and acuteangled edge or lip to the metal or other substance that is to be drilled.
2. In combination with the form of the groove, as above set forth, the incrcasin g twist to facilitate the discharge of the borings or chips.
STEPHEN A. MORSE. In presence of- J AMES EATON, SILAs BURGEss.
iL- si
Publications (1)
Publication Number | Publication Date |
---|---|
US38119A true US38119A (en) | 1863-04-07 |
Family
ID=2107692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US38119D Expired - Lifetime US38119A (en) | Improvement in drill-bits |
Country Status (1)
Country | Link |
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US (1) | US38119A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020120311A1 (en) * | 2000-12-26 | 2002-08-29 | Par Lindh | Expert system and method |
US20040068261A1 (en) * | 2002-07-05 | 2004-04-08 | Fourcault Eric Stephane | Self-boring and self-tapping screw for osteosynthesis and compression |
US20040122297A1 (en) * | 2002-12-18 | 2004-06-24 | Stahmann Jeffrey E. | Advanced patient management for identifying, displaying and assisting with correlating health-related data |
US20040186520A1 (en) * | 1999-12-01 | 2004-09-23 | Cardiac Pacemakers, Inc. | Reforming wet-tantalum capacitors in implantable medical devices |
US20040215259A1 (en) * | 1999-05-21 | 2004-10-28 | Cardiac Pacemakers, Inc. | Method and apparatus for treating irregular ventricular contractions such as during atrial arrhythmia |
US20100286744A1 (en) * | 2004-06-15 | 2010-11-11 | Ebr Systems, Inc. | Methods and systems for heart failure treatments using ultrasound and leadless implantable devices |
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0
- US US38119D patent/US38119A/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040215259A1 (en) * | 1999-05-21 | 2004-10-28 | Cardiac Pacemakers, Inc. | Method and apparatus for treating irregular ventricular contractions such as during atrial arrhythmia |
US20040186520A1 (en) * | 1999-12-01 | 2004-09-23 | Cardiac Pacemakers, Inc. | Reforming wet-tantalum capacitors in implantable medical devices |
US20020120311A1 (en) * | 2000-12-26 | 2002-08-29 | Par Lindh | Expert system and method |
US20040068261A1 (en) * | 2002-07-05 | 2004-04-08 | Fourcault Eric Stephane | Self-boring and self-tapping screw for osteosynthesis and compression |
US7708738B2 (en) * | 2002-07-05 | 2010-05-04 | Newdeal S.A. | Self-boring and self-tapping screw for osteosynthesis and compression |
US20040122297A1 (en) * | 2002-12-18 | 2004-06-24 | Stahmann Jeffrey E. | Advanced patient management for identifying, displaying and assisting with correlating health-related data |
US20100286744A1 (en) * | 2004-06-15 | 2010-11-11 | Ebr Systems, Inc. | Methods and systems for heart failure treatments using ultrasound and leadless implantable devices |
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