US141324A - Improvement in expansive bits - Google Patents
Improvement in expansive bits Download PDFInfo
- Publication number
- US141324A US141324A US141324DA US141324A US 141324 A US141324 A US 141324A US 141324D A US141324D A US 141324DA US 141324 A US141324 A US 141324A
- Authority
- US
- United States
- Prior art keywords
- cutter
- recess
- improvement
- bits
- bit
- 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
- 210000000088 Lip Anatomy 0.000 description 8
- 230000000875 corresponding Effects 0.000 description 4
- 210000001699 lower leg Anatomy 0.000 description 2
- 239000002184 metal 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
- B23B51/04—Drills for trepanning
- B23B51/05—Drills for trepanning for cutting discs from sheet
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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
- Y10T408/86—Tool-support with means to permit positioning of the Tool relative to support
- Y10T408/875—Tool-support with means to permit positioning of the Tool relative to support including means to "form" depression in work
-
- 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
- Y10T408/899—Having inversely angled cutting edge
- Y10T408/90—Having inversely angled cutting edge and axially extending peripheral cutting spur
Definitions
- My invention relates to that class of boring bits which have an adjustable cutter, usually denominated expansible bits, it being an improvement upon the mode of fastening the adjustable cutter shown in my patent granted May 11,1858, and reissued December 12, 1871.
- Figures 1, 2, and 3 are side views of a bit constructed on my improved plan; and Fig.
- ' 4 is a perspective view of an adjustable cutter detached.
- the cutter B as shown at Fig. 4, will be made with corresponding edges, its upper edge n being either inclined or rightangled, according as it is intended to fit one or the other form of recess, and its lower edge 0 being beveled or inclined and slightly rounded, as shown in Figs. 1., 2, and 4, the cutter represented in Fig. 4 being made to fit a recess such as is shown in Fig. 1.
- the cutter is formed as shown in Fig.
- the clamping-plate C whichis a simple flat piece of metal with a hole for a screw at its center, is made so that its lower end will press upon the face of the cutter C near its lower edge, and thereby force the cutter B firmly into its recess or seat, the inclined edge 0 causing its opposite edge a to engage firmly under the overhanging shoulder, as shown clearly in Fig. 1.
- the plate C will be made to fit flat against the face of the cutter B, and thus hold it firmly in place; or, if preferred, the lower edge 0 may have formed thereon a lip, d, beveled or inclined in the opposite direction, to fit in a recess which has an overhanging shoulder at the lower side, as represented in Fig. 3, the upper edge of the cutter B and the corresponding shoulder of the recess being inclined in the opposite direction.
- the clamp C is made so that its lower end will press on face of the cutter near its upper edge, which, acting on the incline, will crowd its lip d into the dovetailed groove at the bottom of the recess, and thereby hold the cutter very securely in place.
- this method of fastening the cutter maybe applied to a bit which has but a single cutting-lip, as represented in Figs. 2 and 3, or to one having two cuttinglips, as shown in Fig.1, 0 representing the lip on the cutter B, and l representing the stationary lip, which is made on the body of the bit proper.
Description
W. A CLARK.
Expansive Bits.
Patented July 29,1873.
llllllllll 51/110,,
t NITED STATES PATENT OFFICE.
WILLIAM A. CLARK, OF NEW HAVEN, CONNECTICUT.
IMPROVEMENT IN EXPANSIVE BITS.
Specification forming part of Letters Patent No. 141,324, dated July 29, 1873 application filed December 5, 1872.
To all whom it may concern:
Be it known that 1, WM. A. CLARK, of New Haven, in the county of New Haven and State of Connecticut, have invented certain Improvements in Expansive Bits, of which the following is a specification:
My invention relates to that class of boring bits which have an adjustable cutter, usually denominated expansible bits, it being an improvement upon the mode of fastening the adjustable cutter shown in my patent granted May 11,1858, and reissued December 12, 1871.
Figures 1, 2, and 3 are side views of a bit constructed on my improved plan; and Fig.
' 4 is a perspective view of an adjustable cutter detached.
In constructing my present bit, I make the body A of the same general form as in my wellknown expansible bit previously patented; but, instead of securing the adjustable cutter, as in that case, I make a seat or recess for its body in the body of the bit A, and then fit over it a clamping piece or plate, C, which I secure to the body A by a screw, 0, as shown in Figs. 1, 2, and 3. In Figs. 1 and 2 I have shown the recess in which the cutter B fits as formed with an inclined or beveled shoulder at the side nearest the point, and the opposite shoulder of the recess may be out under or made to overhang, as shown in Fig. 1; or it may be made a right angle, as shown in Fig. 2. The cutter B, as shown at Fig. 4, will be made with corresponding edges, its upper edge n being either inclined or rightangled, according as it is intended to fit one or the other form of recess, and its lower edge 0 being beveled or inclined and slightly rounded, as shown in Figs. 1., 2, and 4, the cutter represented in Fig. 4 being made to fit a recess such as is shown in Fig. 1. When the cutter is formed as shown in Fig. l the clamping-plate C, whichis a simple flat piece of metal with a hole for a screw at its center, is made so that its lower end will press upon the face of the cutter C near its lower edge, and thereby force the cutter B firmly into its recess or seat, the inclined edge 0 causing its opposite edge a to engage firmly under the overhanging shoulder, as shown clearly in Fig. 1. If the upper shoulder a be made rightangled, then the plate C will be made to fit flat against the face of the cutter B, and thus hold it firmly in place; or, if preferred, the lower edge 0 may have formed thereon a lip, d, beveled or inclined in the opposite direction, to fit in a recess which has an overhanging shoulder at the lower side, as represented in Fig. 3, the upper edge of the cutter B and the corresponding shoulder of the recess being inclined in the opposite direction. In this case the clamp C is made so that its lower end will press on face of the cutter near its upper edge, which, acting on the incline, will crowd its lip d into the dovetailed groove at the bottom of the recess, and thereby hold the cutter very securely in place. I prefer the plans shown in Figs. 1 and 2, because it will be seen that pressure or force applied to the bit in cutting will tend to force it back into the recess, and thus make it all the more tight, whereas in the form shown in Fig. 3 said force will tend to force it out of its seat, thus exerting more strain on the clamp C and its screw 6.
It is obvious that this method of fastening the cutter maybe applied to a bit which has but a single cutting-lip, as represented in Figs. 2 and 3, or to one having two cuttinglips, as shown in Fig.1, 0 representing the lip on the cutter B, and l representing the stationary lip, which is made on the body of the bit proper.
Having thus described nay-invention, what I claim is An adjustable or expanding bit having its cutter B secured in a recess in its shank by means of the clamp C and screw 0, substantially as shown and described.
WILLIAM A. CLARK.
Witnesses PHIL. T. DODGE, J. MOKENNEY.
Publications (1)
Publication Number | Publication Date |
---|---|
US141324A true US141324A (en) | 1873-07-29 |
Family
ID=2210737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US141324D Expired - Lifetime US141324A (en) | Improvement in expansive bits |
Country Status (1)
Country | Link |
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US (1) | US141324A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050249563A1 (en) * | 2004-05-04 | 2005-11-10 | Scott Gary F | Wood boring bit with increased speed, efficiency and ease of use |
US20080138165A1 (en) * | 2006-12-06 | 2008-06-12 | Laverne Durfee | Drill bit |
US20090208302A1 (en) * | 2008-02-19 | 2009-08-20 | Irwin Industrial Tool Company | Multi-blade self feed bit |
-
0
- US US141324D patent/US141324A/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050249563A1 (en) * | 2004-05-04 | 2005-11-10 | Scott Gary F | Wood boring bit with increased speed, efficiency and ease of use |
US7416371B2 (en) | 2004-05-04 | 2008-08-26 | Irwin Industrial Tool Company | Wood boring bit with increased speed, efficiency and ease of use |
US20080138165A1 (en) * | 2006-12-06 | 2008-06-12 | Laverne Durfee | Drill bit |
US20090208302A1 (en) * | 2008-02-19 | 2009-08-20 | Irwin Industrial Tool Company | Multi-blade self feed bit |
US8070398B2 (en) | 2008-02-19 | 2011-12-06 | Irwin Industrial Tool Company | Multi-blade self feed bit |
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