US624439A - Expansion-bit - Google Patents
Expansion-bit Download PDFInfo
- Publication number
- US624439A US624439A US624439DA US624439A US 624439 A US624439 A US 624439A US 624439D A US624439D A US 624439DA US 624439 A US624439 A US 624439A
- Authority
- US
- United States
- Prior art keywords
- cutter
- bit
- expansion
- edge
- plate
- 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
- 230000015572 biosynthetic process Effects 0.000 description 10
- 238000005755 formation reaction Methods 0.000 description 10
- 210000000088 Lip Anatomy 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 210000001699 lower leg Anatomy 0.000 description 4
- 235000007627 Caesalpinia Nutrition 0.000 description 2
- 241000522234 Caesalpinia Species 0.000 description 2
- FSVJFNAIGNNGKK-UHFFFAOYSA-N Praziquantel Chemical compound C1C(C2=CC=CC=C2CC2)N2C(=O)CN1C(=O)C1CCCCC1 FSVJFNAIGNNGKK-UHFFFAOYSA-N 0.000 description 2
- 230000001154 acute Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 230000036633 rest 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
- Y10T408/86—Tool-support with means to permit positioning of the Tool relative to support
- Y10T408/87—Tool having stepped cutting edges
- Y10T408/8738—Tool having stepped cutting edges including inverse 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
- Y10T408/86—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
- Y10T408/86—Tool-support with means to permit positioning of the Tool relative to support
- Y10T408/885—Tool-support with means to permit positioning of the Tool relative to support including tool-holding clamp and clamp actuator
-
- 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
-
- 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
- INVENTOR WITNESSES E w. 624% may M 4? rm: manms FEYERS m Pnoraumq, wAsr-Imswn, n c.
- My invention relates to an improvement in expansion-bits; and it relates to the class of rotaryboring-bits known as center bits, and particularly to center bits which are provided with adjustable cutters, wherein the tendency of the cutter unless prevented by positive means is to be forced forward under the cutting strain, and thus enlarge the hole beyond the size for which the cutter was originally set.
- center bits which are provided with adjustable cutters, wherein the tendency of the cutter unless prevented by positive means is to be forced forward under the cutting strain, and thus enlarge the hole beyond the size for which the cutter was originally set.
- To counteract this tendency of the cutter to crawl many expensive devices have heretofore been employed, which adds greatly to the cost of. manufacture, and thereby detracts very materially from the commercial value of the bit.
- My improvement consists in tapering the base of the cutter in a gradually-diminishing angle toward its cutting-point or nicker, so that when secured by its clamping-plate such angular formation will effectually prevent accidental movement under the cutting strain.
- FIG. 1 represents a front elevation of my improved bit, showing a broken view of the shank.
- FIG. 2 is a view similar to Fig. 1 with the adjustable cutter and its clamping-plate removed.
- Fig. 3 is a similar View showing the adjustable cutter removed.
- Fig. 4 is a side elevation of the bit as shown at Fig. 1 looking in the direction of arrow 0;
- Fig. 5 is a side elevation of the bit-as shown at Fig. 1 looking in the direction of arrow 19.
- Fig. 6 is a detail bottom plan view of the adjustablecutter.
- Fig. 7 is a side elevation of the bit with the cutter removed, showing the cutter-seat formed at right angles to the bit-head.
- Fig. 8 is a modified construction of the cutter, adapted to operate in the head shown at Fig. 7.
- 1 represents the shank of the bit, and 2 its head, which head is provided with the slot or as shown at Fig. 2, and at the same time be parallel with each-other.
- the beveled edge 4 of the clamping-plate 4, Fig. 3, is of course the same taper or angle as the edge 5 of the cutter, so that in shifting the cutter all that is necessary is simply to loosen the screw 6 and move the said cutter in either direction required.
- the screw will have to be turned back a trifle more than ordinaryin order that the clamping-plate may have a greater vertical movement to compensate for the wedgeshaped formation of the cutter.
- the side Walls 8 and 9 of the seat 3 are formed at a right angle to the axis of the bit instead of being angularly disposed thereto, as in the other views.
- the forward or binding lip 4- of the clampi ng-plate would have the same angular formation as shown inthe other views, and the bit, Fig. 8, would have the same angular formation 5 to engage therewith, while the opposite edge 5 will be straight to engage the straight edge 9, Fig. 7, of the seat of the bit.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Knives (AREA)
Description
No. 624,439. Patented May 9, I899.
A. L. ADAMS.
EXPANSION BIT.
(Application filed July 22, 1898.)
(No Model.)
INVENTOR WITNESSES E w. 624% may M 4? rm: manms FEYERS m Pnoraumq, wAsr-Imswn, n c.
UNITED STATES PATENT OFFICE.
ABRAHAM L. ADAMS, OF BRIDGEPORT, CONNECTICUT.
EXPANSION-BIT.
SPECIFICATION forming part of Letters Patent No. 624,439, dated May 9, 1899.
Application filed July 22, 1898. Serial No. 686,639. (No model.)
To (l/ZZ whom, it may concern:
Be it known that I, ABRAHAM L. ADAMS, a citizen of the United States, and a resident of Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Expansion- Bits, of which the following is a specification.
My invention relates to an improvement in expansion-bits; and it relates to the class of rotaryboring-bits known as center bits, and particularly to center bits which are provided with adjustable cutters, wherein the tendency of the cutter unless prevented by positive means is to be forced forward under the cutting strain, and thus enlarge the hole beyond the size for which the cutter was originally set. To counteract this tendency of the cutter to crawl, many expensive devices have heretofore been employed, which adds greatly to the cost of. manufacture, and thereby detracts very materially from the commercial value of the bit. v
My improvement consists in tapering the base of the cutter in a gradually-diminishing angle toward its cutting-point or nicker, so that when secured by its clamping-plate such angular formation will effectually prevent accidental movement under the cutting strain.
To enable others to fully understand myin vention, reference is had to the accompanying drawings, in which-- Figure 1 represents a front elevation of my improved bit, showing a broken view of the shank. Fig. 2 is a view similar to Fig. 1 with the adjustable cutter and its clamping-plate removed. Fig. 3 is a similar View showing the adjustable cutter removed. Fig. 4 is a side elevation of the bit as shown at Fig. 1 looking in the direction of arrow 0;. Fig. 5 is a side elevation of the bit-as shown at Fig. 1 looking in the direction of arrow 19. Fig. 6 is a detail bottom plan view of the adjustablecutter. Fig. 7 is a side elevation of the bit with the cutter removed, showing the cutter-seat formed at right angles to the bit-head. Fig. 8 is a modified construction of the cutter, adapted to operate in the head shown at Fig. 7.
The construction and operation are as follows:
1 represents the shank of the bit, and 2 its head, which head is provided with the slot or as shown at Fig. 2, and at the same time be parallel with each-other.
The beveled edge 5 of the bit rests against the edge 9 of the seat 3, while the angle of the opposite beveled edge 5" is more acute, making the rear end 5 of the adjustable cutter wider than the forward end 5 thereby for1ning the base of the cutter tapering or wedgeshaped.
The beveled edge 4 of the clamping-plate 4, Fig. 3, is of course the same taper or angle as the edge 5 of the cutter, so that in shifting the cutter all that is necessary is simply to loosen the screw 6 and move the said cutter in either direction required. In this case, where the cutter is provided with the wedgeshaped base, the screw will have to be turned back a trifle more than ordinaryin order that the clamping-plate may have a greater vertical movement to compensate for the wedgeshaped formation of the cutter. The clamp-v ing screw and plate will easily hold the cut ter down, while its wedge-shaped formation will efiectually prevent its being drawn forward in the only direction it is liable to be accidentally moved under the cutting opera= tion.
In the modification shown at Fig. 7 the side Walls 8 and 9 of the seat 3 are formed at a right angle to the axis of the bit instead of being angularly disposed thereto, as in the other views. The forward or binding lip 4- of the clampi ng-plate would have the same angular formation as shown inthe other views, and the bit, Fig. 8, would have the same angular formation 5 to engage therewith, while the opposite edge 5 will be straight to engage the straight edge 9, Fig. 7, of the seat of the bit.
From the foregoing description it will readily be seen that my improvement has a decided advantage over cutters that are provided with teeth and pinions to prevent lon- 7 I claim as new, and desire to secure by Letters 4 Patent, is
1. The herein-described improvement in expansive bits consisting of a cutter provided 1 with a wedge-shaped base whereby the forward end of said base is made narrower than its rear endto prevent accidental displacement of said cutter under the cutting strain said cutter having a beveled edge combined with a clamping-plate having abeveled edge adapted to engage with the beveled edge of said cutter substantially as described and for the purpose set forth.
2. The combination, in an expansive bit of the character described, of the head 2 provided with a cutter-seat Whose side walls are formed parallel to each other, the cutter 5 having the singularly-formed beveled edge 5 so as to leave the front end 5 of said cutter narrower than its rear end 5, the clampingplate 4 whose cutter-engaging lip i is also beveled to correspond to the'beveled edge of said cutter and tapered to the same pitch or angle as the angularly-disposed edge 5 of the cutter, substantially as set forth.
3. The herein-described improvement in expansion-bits consisting of a cutter whose base is made narrower at the forward or cutting end than at its rear end, combined with a head portion whose forward end wall is angularly disposed, a clamping-plate whose forward end is of an opposite taper to the said end wall of the head, thus making the side supports for the said cutter to correspond to its angularly-disposed edges said cutter and clamping-plate having correspondingly-beveled engaging edges, substantially as described and for the purpose set forth.
Signed at Bridgeport, in thecounty of Fairfield and Stateof Connecticut, this 30th day of June, A. D. 1898.
, ABRAHAM L. ADAMS.
Witnesses:
DAVID M. LAOKIE, J. W. RANGE.
Publications (1)
Publication Number | Publication Date |
---|---|
US624439A true US624439A (en) | 1899-05-09 |
Family
ID=2693043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US624439D Expired - Lifetime US624439A (en) | Expansion-bit |
Country Status (1)
Country | Link |
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US (1) | US624439A (en) |
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0
- US US624439D patent/US624439A/en not_active Expired - Lifetime
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