US283040A - Auger-bit - Google Patents
Auger-bit Download PDFInfo
- Publication number
- US283040A US283040A US283040DA US283040A US 283040 A US283040 A US 283040A US 283040D A US283040D A US 283040DA US 283040 A US283040 A US 283040A
- Authority
- US
- United States
- Prior art keywords
- bit
- wood
- screw
- auger
- leading
- 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
- 239000002023 wood Substances 0.000 description 32
- 230000001419 dependent Effects 0.000 description 2
- 210000001699 lower leg Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000979 retarding Effects 0.000 description 2
Images
Classifications
-
- 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
-
- 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
- Y10T408/901—Having axially extending peripheral cutting spur
Definitions
- My invention consists in a spur-bit provided with spurs or cutters to first enter the wood, and having cutting-edges of itsfloor-lips extended inwardly to the center line of the bit, thus obviating the employment of the leading screw.
- Figure l is a side elevation of an auger-bit embodying my invention
- Fig. 2 another side view of part of the bit turned one-fourth round from Fig. 1
- Fig. 3 is an end view of the bit.
- end of the 'pod is provided with two spurs, c c, which extend a little beyond the floor-lips (1, made at the end of the pod, as seen in Fig. 3, wherein it will be noticed that the edges of the floor-lip extend substantially to the center line or axial center of the pod, so that the wood within the circular incision made by the cut ters c is chipped out by the floor-lip, and the wood not being expanded and hardened by a leading-screw,-thefloor-lip readily cuts therein.
- a twisted bit provided with spurs or cutters c, to first enter the wood, and having the edges of its floor-lip extended to the axial center of the bit, thus enabling the usual leading-screw to be omitted, substantially as described.
- the pod a and shank b are all as usual.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Debarking, Splitting, And Disintegration Of Timber (AREA)
Description
(ModeL) Y J. SWAN. AUGER. BIT.
Patented Aug. 14, 1883.
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NI-TED STATES.
PATENT O FIGE.
JAMEs SWAN, or sEYMoUn, CONNECTICUT.
AUGER-BIT. v
SPECIFICATIQIQ' forming part of Letters Patent No. 283,040, dated August 14, 1883.
Application filed May 16, 1883. (Model) To all whom .it may concern Be it known that I, JAMES SWAN, of Seymour, county of New Haven, State of Connecticut, have invented an Improvement in Auger- Bits, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts. i
p All twisted. auger-bits known to me as now constructed have what is called a leadingscrew, which draws the pod and cutting parts into the wood at a speed depending upon the pitch of the thread cut on the said leadingscrew, and the bit enters the wood at each turn only for a distance defined by the pitch of the said screw. This screw, besides retarding the entrance of the auger or bit, is also very objectionable'because it acts as a wedge and splits the wood. By experiment I have discovered that splitting of the wood may be obyiated by omitting the leading-screw and providing the bit with spurs to enter and produce 1 pod to be carried out of the hole.
an annular incision in the wood in advance of the action of the floor-lip, the latter merely acting to chip up the wood within the annular incision and deliver it into the grooves of the Omitting the leading-screw also results in leaving the wood in. a better condition to be chipped out, *for it is not compressed or hardened before the floor-lip strikes it, as is the case when the wood is wedged aside by the leading-screw. The inner cutting edgesof the floor-lip are extended substantially to the center or axial line of the bit, and act to draw the bit into the wood, as does the usual leading-screw. The leading-screw is also seriously objectionable when acting at an angle to the grain of the wood, as it is apt to be diverted from a straight line by the irregulargrain of the wood, thus frequently failing to bore a truly straight and' cylindrical hole.
To obviate this running,
ing-screw extra pressure exerted. on the bit enables it to be forced into the wood at each r0.- tation for a distance dependent almost entirely upon the amount of pressure so exerted, rather than upon the pitch of the leading-screw, as in common bits. One of my improved bits may be made to bore much more rapidly than were a leading screw employed, and. at the same time do as good work with no greater expenditure of power.
My invention consists in a spur-bit provided with spurs or cutters to first enter the wood, and having cutting-edges of itsfloor-lips extended inwardly to the center line of the bit, thus obviating the employment of the leading screw.
Figure l is a side elevation of an auger-bit embodying my invention; Fig. 2, another side view of part of the bit turned one-fourth round from Fig. 1; and Fig. 3 is an end view of the bit.
end of the 'pod is provided with two spurs, c c, which extend a little beyond the floor-lips (1, made at the end of the pod, as seen in Fig. 3, wherein it will be noticed that the edges of the floor-lip extend substantially to the center line or axial center of the pod, so that the wood within the circular incision made by the cut ters c is chipped out by the floor-lip, and the wood not being expanded and hardened by a leading-screw,-thefloor-lip readily cuts therein.
I claim As an improved article of manufacture, a twisted bit provided with spurs or cutters c, to first enter the wood, and having the edges of its floor-lip extended to the axial center of the bit, thus enabling the usual leading-screw to be omitted, substantially as described.
In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.
JAMES swAN.
Witnesses:
A. B. Posr,
W. H. WHITTEMORE.
The pod a and shank b are all as usual. The
Publications (1)
Publication Number | Publication Date |
---|---|
US283040A true US283040A (en) | 1883-08-14 |
Family
ID=2352247
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US283040D Expired - Lifetime US283040A (en) | Auger-bit |
Country Status (1)
Country | Link |
---|---|
US (1) | US283040A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2675841A (en) * | 1951-07-28 | 1954-04-20 | Nat Gypsum Co | Drill |
US4285620A (en) * | 1979-06-14 | 1981-08-25 | Mcdonnell Douglas Corporation | Symmetrical spur point drill |
-
0
- US US283040D patent/US283040A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2675841A (en) * | 1951-07-28 | 1954-04-20 | Nat Gypsum Co | Drill |
US4285620A (en) * | 1979-06-14 | 1981-08-25 | Mcdonnell Douglas Corporation | Symmetrical spur point drill |
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