US460639A - Marking twist-drills - Google Patents
Marking twist-drills Download PDFInfo
- Publication number
- US460639A US460639A US460639DA US460639A US 460639 A US460639 A US 460639A US 460639D A US460639D A US 460639DA US 460639 A US460639 A US 460639A
- Authority
- US
- United States
- Prior art keywords
- marking
- drills
- twist
- drill
- 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
- 210000001847 Jaw Anatomy 0.000 description 2
- 241001446467 Mama Species 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
- fiiE ma mien co., momumq, wumucnuu, u. c.
- My invention consists in stamping orotherwise marking the number or other mark or marks indicating the size of a twist drill or bit in the groove of the same.
- ⁇ Vhen'drills are marked in the usual way, which is on the periphery, where they are gripped by the chuck or by the jaws of a bitbrace, or where the surface is worn by the friction of the material around the hole being bored, the marking is very soon obliterated or rendered indistinct by the mutilation of the drill by the chuck or brace or the wearing of the same in the material drilled. A constant inconvenience is thereby caused the workmen using such tools, who are compelled often to select them by the use of calipers,
- the marking may be made in the usual way by a hand or power press supporting the drill or bit by a die underneath it conforming to its configuration, and impressing the marking, out in the usual manner upon an upper die, or by any of the usual modes.
- the marking may be made longitudinally in the groove in an elongated form, (thus 3-8 instead of to permit the use of larger figures, if desired.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Description
(No Model.)
G. L. HOLT. MARKING TWIST DRILLS.
No. 460,639. Patented Oct. 6, 1891.
fiiE mama mien: co., momumq, wumucnuu, u. c.
UNITED STATES PATENT OFFIC GARDNER L. HOLT, OF SPRINGFIELD, MASSACHUSETTS.
MARKING TWIST-DRILLS.
SPECIFICATION forming part of Letters Patent No. 460,639, dated October 6,1891.
Application filed March '7, 1889. Serial No. 302,004. (No model.)
To a whom, it nuty concern:
Be it known that I, GARDNER L. HOLT, of Springfield, in the county of Hampden and State of Massachusetts, have invented a certain new and useful Improvement in Marking. Drills and Bits, whereof the following is a specification, reference being had to the accompanying drawing, in which the figure represents in elevationadrill having the number indicating its size marked in its groove in my improved method.
My invention consists in stamping orotherwise marking the number or other mark or marks indicating the size of a twist drill or bit in the groove of the same.
\Vhen'drills are marked in the usual way, which is on the periphery, where they are gripped by the chuck or by the jaws of a bitbrace, or where the surface is worn by the friction of the material around the hole being bored, the marking is very soon obliterated or rendered indistinct by the mutilation of the drill by the chuck or brace or the wearing of the same in the material drilled. A constant inconvenience is thereby caused the workmen using such tools, who are compelled often to select them by the use of calipers,
and mistakes of size often occur, causing damage to the work. These evils are obviated by placing the marking in the groove, because it is there protected from the grip and wear of use by the depression wherein it is. The mark is also more conspicuous when the drill is put away in the usual rack.
The marking may be made in the usual way by a hand or power press supporting the drill or bit by a die underneath it conforming to its configuration, and impressing the marking, out in the usual manner upon an upper die, or by any of the usual modes. In smaller grooves the marking may be made longitudinally in the groove in an elongated form, (thus 3-8 instead of to permit the use of larger figures, if desired.
What I claim as my invention, and for which I pray Letters Patent, is
A twist-drill having the markingindioating its size made in its groove, substantially as described.
GARDNER L. HOLT.
In presence of JosEPH R. CHURCH,
NELSON W. MERRILL.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US460639A true US460639A (en) | 1891-10-06 |
Family
ID=2529513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US460639D Expired - Lifetime US460639A (en) | Marking twist-drills |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US460639A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6050754A (en) * | 1997-05-29 | 2000-04-18 | Black & Decker Inc. | Self-centering drill bit with pilot tip, and process |
| US20030170079A1 (en) * | 2002-03-11 | 2003-09-11 | Mitsubishi Materials Corporation | Throwaway insert and cutting tool having throwaway insert |
| US20060008332A1 (en) * | 2002-12-24 | 2006-01-12 | Greenberg Surgical Technologies, Llc | Collet collar stop for a drill bit |
| US9085074B2 (en) | 2011-03-22 | 2015-07-21 | Black & Decker Inc. | Chisels |
| USD734792S1 (en) | 2013-03-15 | 2015-07-21 | Black & Decker Inc. | Drill bit |
| USD737875S1 (en) | 2013-03-15 | 2015-09-01 | Black & Decker Inc. | Drill bit |
| US9333564B2 (en) | 2013-03-15 | 2016-05-10 | Black & Decker Inc. | Drill bit |
-
0
- US US460639D patent/US460639A/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6050754A (en) * | 1997-05-29 | 2000-04-18 | Black & Decker Inc. | Self-centering drill bit with pilot tip, and process |
| US6190097B1 (en) * | 1997-05-29 | 2001-02-20 | Black & Decker Inc. | Self-centering drill bit with pilot tip, and process |
| US20030170079A1 (en) * | 2002-03-11 | 2003-09-11 | Mitsubishi Materials Corporation | Throwaway insert and cutting tool having throwaway insert |
| US7014395B2 (en) * | 2002-03-11 | 2006-03-21 | Mitsubishi Materials Corporation | Throwaway insert and cutting tool having throwaway insert |
| US20060008332A1 (en) * | 2002-12-24 | 2006-01-12 | Greenberg Surgical Technologies, Llc | Collet collar stop for a drill bit |
| US7513722B2 (en) * | 2003-12-30 | 2009-04-07 | Greenberg Surgical Technologies, Llc | Collet collar stop for a drill bit |
| US9085074B2 (en) | 2011-03-22 | 2015-07-21 | Black & Decker Inc. | Chisels |
| US9333635B2 (en) | 2011-03-22 | 2016-05-10 | Black & Decker Inc. | Chisels |
| USD734792S1 (en) | 2013-03-15 | 2015-07-21 | Black & Decker Inc. | Drill bit |
| USD737875S1 (en) | 2013-03-15 | 2015-09-01 | Black & Decker Inc. | Drill bit |
| US9333564B2 (en) | 2013-03-15 | 2016-05-10 | Black & Decker Inc. | Drill bit |
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