US371387A - Albeet u - Google Patents
Albeet u Download PDFInfo
- Publication number
- US371387A US371387A US371387DA US371387A US 371387 A US371387 A US 371387A US 371387D A US371387D A US 371387DA US 371387 A US371387 A US 371387A
- Authority
- US
- United States
- Prior art keywords
- recess
- head
- cut
- countersink
- cone
- 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
- 239000002023 wood Substances 0.000 description 6
- 238000010008 shearing Methods 0.000 description 4
- 244000145845 Chattering Species 0.000 description 2
- 210000001699 lower leg Anatomy 0.000 description 2
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/007—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor for internal turning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/10—Bits for countersinking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G15/00—Boring or turning tools; Augers
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- 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
Definitions
- This invention relates to an improvement in eountersinks adapted to cutting conical cavities in wood, and particularly to that class in which the head of the countersink is made in the form of a smooth-surfaced cone with a single cutter radiating-from the apex of the cone.
- the object of my invention is the construction of the countersinkhead so that the cut may be downward and into the recess, in contradistinction to being parallel with the surface, or baekwardly and outwardly inclined thereto-that is, so as to make an inward shearing out.
- A represents the spindle of the countersink
- the hereindescribed countersink consisting of a spindle having a conical head, with a vertical recess in one side extending from the apcxnpward through the cone, one side of said recess being substantially in the plane of the axis of the cone, the width of the said recess being less than one-half the larger diameter of the head, the outer edge of the other side of the recess forming, a for wardly-inclined cutting edge, substantially as described.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
Description
(No Model.)
A. U. SMITH.
GOUNTBRSINK.
No. 371,387. Patented Oct. 11,1887.
V UNITED STATES PATENT OFFICE.
ALBER-T U. SMITH, OF SEYMOUR, CONNECTICUT, ASSIGNOR TO NORMAN SPERRY, OF SAME PLACE.
COUNTERSINK.
SPECIFICATION forming part of Letters Patent No. 371,387, dated October 11, 1887.
Application tiled Apr-i125, 1887.
To aZZ whom it may concern.-
Be it known that I, ALBERT UJSMITH, of Seymour, in the county of New Haven and 'State of Connecticut, have invented a new Improvement in Countersinks; and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in-- Figure 1, a side view enlarged; Fig. 2, a point end view.
This invention relates to an improvement in eountersinks adapted to cutting conical cavities in wood, and particularly to that class in which the head of the countersink is made in the form of a smooth-surfaced cone with a single cutter radiating-from the apex of the cone.
In the usual construction of this class of eountersinks the cutting-edge has been made straight from the apex of the cone, so that the out comes directly in a plane parallel with the surface worked upon, or the cutting-edge has been inclined or curved backward. YVhile such cutters will work rapidly into the wood, there is great liability of splitting the surface of the wood around the hole, because of the direct cut produced by the countersink-head, and this difiiculty in the backwardly-inclined or curved cutters is greatly increased over the vertical cuttingedgc because of the upward tendency of the cut. Again, because of such direct cut, it is very difficult to produce a smooth cavity, except in the very hardest woods, as the cutter will jump on the cross grains and run smoothlyover the direct grains.
The object of my invention is the construction of the countersinkhead so that the cut may be downward and into the recess, in contradistinction to being parallel with the surface, or baekwardly and outwardly inclined thereto-that is, so as to make an inward shearing out.
A represents the spindle of the countersink,
Serial No. 236.054. (No model.)
terminating at one end in the usual shank, B, and at the other end in the coneshaped head C. Into one side of the head a recess, a, is cut, and this cut is made so that one side comes in substantially the plane of the axis of the head, as seen in Fig. 2, the recess being back of this side, and the width of this recess measuiing at substantially right angles to the said forward side, the line (I, Fig. 2, indicating such line, is less than half the larger diameter of the head, as also seen in Fig. 2. From this it follows that the rear or cutting edge, I), formed by such recess, will be curved or inclined forward from the apex of the cone to the extreme point at the larger diameter of the head-that is, of substantially a helical shape curving forward. This peculiar shape pre sents a cutting-edge forwardly and circumferentially inclined; hence in operation the cut is downward inwardly inclined to the surface through which the countersink is working, in contradistinction to the cut made in the plane of the surface, or backwardly and outwardly inclined thereto, as produced in the usual construction of the countersink. The result is, that the countersink has an outward and inward shearing or shaving cut necessarily smooth, and avoids the jumping or chattering which necessarily attends the use of a radial cutter.
I claim The hereindescribed countersink, consisting of a spindle having a conical head, with a vertical recess in one side extending from the apcxnpward through the cone, one side of said recess being substantially in the plane of the axis of the cone, the width of the said recess being less than one-half the larger diameter of the head, the outer edge of the other side of the recess forming, a for wardly-inclined cutting edge, substantially as described.
ALBERT U. SMITH.
\Vitnesses:
E. E. ADAMS, R. H. CLARK.
Publications (1)
Publication Number | Publication Date |
---|---|
US371387A true US371387A (en) | 1887-10-11 |
Family
ID=2440398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US371387D Expired - Lifetime US371387A (en) | Albeet u |
Country Status (1)
Country | Link |
---|---|
US (1) | US371387A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3645641A (en) * | 1970-05-04 | 1972-02-29 | Jae Sun Kim | Countersink |
US8021085B1 (en) * | 2007-02-23 | 2011-09-20 | Lance Nelson | Engraving tool with a very strong cutter tip to reduce breakage |
US20120109845A1 (en) * | 2010-10-27 | 2012-05-03 | Trading Technologies International, Inc. | Repositioning a Value Axis |
-
0
- US US371387D patent/US371387A/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3645641A (en) * | 1970-05-04 | 1972-02-29 | Jae Sun Kim | Countersink |
US8021085B1 (en) * | 2007-02-23 | 2011-09-20 | Lance Nelson | Engraving tool with a very strong cutter tip to reduce breakage |
US20120109845A1 (en) * | 2010-10-27 | 2012-05-03 | Trading Technologies International, Inc. | Repositioning a Value Axis |
US9858620B2 (en) * | 2010-10-27 | 2018-01-02 | Trading Technologies International, Inc. | Repositioning a value axis |
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