US354155A - Twist-drill and auger-bit - Google Patents
Twist-drill and auger-bit Download PDFInfo
- Publication number
- US354155A US354155A US354155DA US354155A US 354155 A US354155 A US 354155A US 354155D A US354155D A US 354155DA US 354155 A US354155 A US 354155A
- Authority
- US
- United States
- Prior art keywords
- drill
- twist
- auger
- bit
- groove
- 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
- 238000010276 construction Methods 0.000 description 6
- 206010002368 Anger Diseases 0.000 description 2
- 241000408670 Hosea Species 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 210000001699 lower leg Anatomy 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000717 retained Effects 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
- my invention consists in constructing the drill with a wide shallow groove or recess made in the space on each side of the spiral-clearing groove, which space is flat in twist-drills of ordinary construction, by which means the friction of the drill is very much reduced when in use, and the heating of the drill, which frequently results in its breaking, is to a great extent prevented.
- Figure 1 represents a twist-drill embodying my invention.
- Fig. 2 is a front View of the point.
- A, Fig. 1 represents the body of a twistdrill, a the drill-point, b the clearing-groove, and B the shank, all of which are of ordinary construction.
- 0 is a shallow groove or recess in thespace between the spirals of the groove 11.
- My invention may also be applied to angers.
- ⁇ Vhat I claim as my invention is- A twist-drill constructed with a Wide shallow groove or recess in the space on each side of the spiral-clearing groove, as and for the purpose set forth.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Description
(No Model.)
H. W. LIBBEY.
TWIST DRILL AND AUGER BIT. No. 354,155. Patented Dec. 14, 1886.
ETERS. Pnmo-Lnnowher, Wnhmgtcn. D. c.
UNITED STATES PATENT OFFICE.
HOSEA W. LIBBEY, OF BOSTON, MASSACHUSETTS.
TWIST-DRILL AND AUGER-BIT.
SPECIFICATION forming part of Letters Patent No. 354,155, dated December 14, 1886.
Application filed Setempber 2, 1886. Serial No. 212,460. (No model.)
To all whom, it may concern.-
Be it known that I, HOSEA W. LIBBEY, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Twist-Drills and Auger-Bits, of which the following is a specification.
The nature of my invention consists in constructing the drill with a wide shallow groove or recess made in the space on each side of the spiral-clearing groove, which space is flat in twist-drills of ordinary construction, by which means the friction of the drill is very much reduced when in use, and the heating of the drill, which frequently results in its breaking, is to a great extent prevented.
Referring to the accompanying drawings, Figure 1 represents a twist-drill embodying my invention. Fig. 2 is a front View of the point.
A, Fig. 1, represents the body of a twistdrill, a the drill-point, b the clearing-groove, and B the shank, all of which are of ordinary construction. 0 is a shallow groove or recess in thespace between the spirals of the groove 11.
It will be seen that when the drill enters the metal to be bored, only a narrow portion of flat surface 61 on each side of .the clearinggroove 1) will come into contact with the inte rior surface of the hole bored, thereby reducing the friction and preventing the drill from becoming heated as quickly as in drills of ordinary construction, where the whole surface between the clearing-groove is in contact with the interior surface of the hole. By thus reducing the friction the temper of the drill is better retained, and it is not liable to break, as is the case with ordinary drills. The recessed or grooved portion 0 also aids in clearing the hole and carrying off the chippings.
My invention may also be applied to angers.
I am aware of the patent of T. V. Boyden, No. 112,115, which shows a small groove on the outer edge of the drill for the reception of oil. This I do not claim; but
\Vhat I claim as my invention is- A twist-drill constructed with a Wide shallow groove or recess in the space on each side of the spiral-clearing groove, as and for the purpose set forth.
Intestimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.
HOSEA W. LIBBEYQ W'itnesses:
J. H. ADAMS, E. PLANTA.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US354155A true US354155A (en) | 1886-12-14 |
Family
ID=2423207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US354155D Expired - Lifetime US354155A (en) | Twist-drill and auger-bit |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US354155A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4130372A (en) * | 1977-04-27 | 1978-12-19 | Augustin Vugrin | Guide bushing for rotary tool |
| US4218795A (en) * | 1979-03-07 | 1980-08-26 | Illinois Tool Works Inc. | Drill bit with fastener-driving collar assembly |
-
0
- US US354155D patent/US354155A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4130372A (en) * | 1977-04-27 | 1978-12-19 | Augustin Vugrin | Guide bushing for rotary tool |
| US4218795A (en) * | 1979-03-07 | 1980-08-26 | Illinois Tool Works Inc. | Drill bit with fastener-driving collar assembly |
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