US719860A - Twist or like drill. - Google Patents
Twist or like drill. Download PDFInfo
- Publication number
- US719860A US719860A US11934502A US1902119345A US719860A US 719860 A US719860 A US 719860A US 11934502 A US11934502 A US 11934502A US 1902119345 A US1902119345 A US 1902119345A US 719860 A US719860 A US 719860A
- Authority
- US
- United States
- Prior art keywords
- drill
- bit
- twist
- platt
- slot
- 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
- 241000139306 Platt Species 0.000 description 4
- 235000013290 Sagittaria latifolia Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000015246 common arrowhead Nutrition 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- ONCZDRURRATYFI-QTCHDTBASA-N methyl (2z)-2-methoxyimino-2-[2-[[(e)-1-[3-(trifluoromethyl)phenyl]ethylideneamino]oxymethyl]phenyl]acetate Chemical compound CO\N=C(/C(=O)OC)C1=CC=CC=C1CO\N=C(/C)C1=CC=CC(C(F)(F)F)=C1 ONCZDRURRATYFI-QTCHDTBASA-N 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S408/00—Cutting by use of rotating axially moving tool
- Y10S408/713—Tool having detachable cutting edge
-
- 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
Description
No. 7 19,860. PATENTEDFEB.3,1903.
J., w, a: H. BLATT. TWIST 0R LIKE DRILL.
APPLICATION um um. 11, 1902.
10 MODEL.
UNITED STATES PATENT OFFICE.
JOHN PLATT, WILLIAM PLATT, AND HENRY PLATT, OF OLDHAM, ENGLAND.
TWIST OR LIKE DRILL.
SPECIFICATION formingpart of Letters Patent No. 719,860, dated February 3, 1903.
Application filed August 11, 1902. Serial No. 119,345. (No model.)
T0 00% whom it may concern:
Be it known that we,JoHN PLATT, WILLIAM PLATT, and HENRY PLATT, subjects of His Majesty the King of Great Britain, residing at Oldham, in the county of Lancaster, England, have invented a certain new and useful Improvement in Twist or Like Drills, of which the following is a specification.
This invention relates to an improvement in twist and like drills, such as those having grooves which are parallel to the axis in place of being spiral, the object being to obviate the necessity of grinding, with-which is accompanied the repeated shortening of the drill. According to the invention the drill for this purpose is provided with a detachable cutting-bit and with means for holding and automatically adjusting or centering same, such bits being carried in the cutting end of What hitherto formed the drill proper. V
The invention is illustrated in the accompanying drawings, in Which Figure l is an elevation of a twist-drill, partly in section. Fig. 2 is a plan view of the point of same. Fig. 3 is an elevation of a drill on a somewhat smaller scale. Fig. 4 is also an elevation at right angles to Fig. 3. Fig. 5 is an elevation of the cutting-bit.
The drill consists of the usual grooved spindle a, the drilling end being, as usual, ground or turned off to an angle, as at b b. A cross slot or slit 0 c is then out or formed across the center end of the required depth, the bottom of which is V-shaped, the apex of the angles being true and central to the center of. the spindle. l
The bit at is made from fiat steel of a thickness or gage corresponding to the width of the holding-slot c and is of double-V or arrow-head shape, its inner edges abutting on the angles of the slot 0, while its upper and outer V projects slightly beyond the point of the holder, as shown by the dotted line 6, which represents the end of the spindle. The
also is held in place.
inner angles of the bit being of corresponding angle of the slot 0 c, the bit automatically adjusts itself central to the holder and The cutting edges of the bit 61, which project beyond the line 6, are reversely beveled by grinding, asat f f, and the sides are also beveled, as at g, to correspond with the curvature of the side of the spindle. The two grooves extend to the point of the drill, and each advancing face of the bit (I is practically flush with and forms a continuation of the advancing side or edge of the groove, as is seen atthe point marked 00 in Figs. 3 and t. When the bit is no longer effective, it is readily driven out of its holder and replaced by a new bit, the latter being manufactured at less cost than the time and power expended in regrinding as heretofore practiced costs and the original length of the entire drill is preserved.
What we claim is 1. In combination, a drill having a slot-in its end, said slot having angular faces centering in the center line of the drill, and a loose bit having exterior cutting edges, its inside edges shaped to seat in said slot, and its sides flush with the side of said drill.
2. In combination, a drill having a slot in its end, said slot having angular faces cen tering in the center line of the drill, and a loose bit having reversely-inclined exterior cutting edges, inside edges cut to an angle and corresponding to the angular faces in the slotof the drill, and sides shaped to the curvature of the sides of the drill.
In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.
JOHN- PLATT. WILLIAM PLATT. HENRY PLATT. Witnesses: a
ALFRED O. HARRISON, S. PAIRE.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11934502A US719860A (en) | 1902-08-11 | 1902-08-11 | Twist or like drill. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11934502A US719860A (en) | 1902-08-11 | 1902-08-11 | Twist or like drill. |
Publications (1)
Publication Number | Publication Date |
---|---|
US719860A true US719860A (en) | 1903-02-03 |
Family
ID=2788375
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11934502A Expired - Lifetime US719860A (en) | 1902-08-11 | 1902-08-11 | Twist or like drill. |
Country Status (1)
Country | Link |
---|---|
US (1) | US719860A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3912414A (en) * | 1972-06-09 | 1975-10-14 | Sumitomo Electric Industries | Cemented carbide twist drill |
US4473070A (en) * | 1983-01-05 | 1984-09-25 | Regents Of The University Of Michigan | Intramedullary reamer |
-
1902
- 1902-08-11 US US11934502A patent/US719860A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3912414A (en) * | 1972-06-09 | 1975-10-14 | Sumitomo Electric Industries | Cemented carbide twist drill |
US4473070A (en) * | 1983-01-05 | 1984-09-25 | Regents Of The University Of Michigan | Intramedullary reamer |
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