US215264A - Improvement in taps - Google Patents
Improvement in taps Download PDFInfo
- Publication number
- US215264A US215264A US215264DA US215264A US 215264 A US215264 A US 215264A US 215264D A US215264D A US 215264DA US 215264 A US215264 A US 215264A
- Authority
- US
- United States
- Prior art keywords
- cutters
- tap
- taps
- improvement
- castle
- 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
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 210000001699 lower leg Anatomy 0.000 description 2
- 239000010959 steel 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
-
- 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
Definitions
- the object of this invention is to provide a tap that can be constructed more cheaply and will last longer than those now in use.
- Figure 1 represents a side elevation of my improvement.
- Fig. 2 is a longitudinal section of the same on line as w,- and
- Fig. 3 is a transverse section thereof on line 3/ y.
- A represents the body of the tap, and c is the shank thereof, to which a wrench is applied in operating the tap.
- a at a a are longitudinal grooves in the surface of the body A, equidistant from each other.
- the bottom of the groove a has the same taper as the surface of body A.
- cutters B are the cutters, which are made separately, of fin ly-tempered steel, and of a size to fit and slide freely in the grooves a. These cutters B have cutting-threads similar to an ordinary tap, which threads project above the surface of body A when the cutters are in place. The cutters B are held in place in the groove a by an internally-threaded,ring, c,
- the thread 1 becomes a guide for setting them so that the cutters will follow in the proper lead; and, if desired, the end of the cutters that projects when they are set down maybe ground off.
- a tap consisting of the grooved tapered body A, threaded at b, the cutters B, arranged in grooves a, and the threaded ring C, all constructed substantially as shown and described.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Knives (AREA)
Description
L. D. CASTLE &'J. W. STRONG.
Tap.
Patened May 13,1879.
' INVENT'OR: QM BY 7 ATTORNEYS.
' WITNESSES 64% f g w /mo/w UNITED STATES PATENT OFFICE.
LEWIS 1). CASTLE AND JOHN W. STRONG, OF BRIDGEPORT, CONNECTICUT.
IM PROVEMENT IN TAPS.
Specification forming part of Letters Patent No. 215,264, dated May 13, 1879; application filed August 31, 1878.
To all whom it may concern:
Be it known that we, LEWIS D. CASTLE and JOHN W. STRONG, of Bridgeport, in the county of Fairlield and State of Connecticut, have invented a new and Improved Tap, of which the following is a specification.
The object of this invention is to provide a tap that can be constructed more cheaply and will last longer than those now in use.
The invention will first be described in connection with the drawings, and then pointed out in the claim.
In the accompanying drawings, Figure 1 represents a side elevation of my improvement. Fig. 2 is a longitudinal section of the same on line as w,- and Fig. 3 is a transverse section thereof on line 3/ y.
Similar letters of reference indicate correspondin g parts.
A represents the body of the tap, and c is the shank thereof, to which a wrench is applied in operating the tap. The surface of A tapers toward the lower end, and its surface, about a third of the distance from the upper end, is formed with a screw-thread, as shown at l).
a at a a are longitudinal grooves in the surface of the body A, equidistant from each other. The bottom of the groove a has the same taper as the surface of body A.
B are the cutters, which are made separately, of fin ly-tempered steel, and of a size to fit and slide freely in the grooves a. These cutters B have cutting-threads similar to an ordinary tap, which threads project above the surface of body A when the cutters are in place. The cutters B are held in place in the groove a by an internally-threaded,ring, c,
which engages the threads of the cutters B and the thread I) on the body of the tap, as
seen in Figs. 1 and 2. The cutters are thereby also permits the removal of a broken cutter and insertion of a new one.
In placing the cutters in their grooves a, the thread 1) becomes a guide for setting them so that the cutters will follow in the proper lead; and, if desired, the end of the cutters that projects when they are set down maybe ground off.
We are aware that it is not new to provide a tap-stock with longitudinal grooves to receive a similar grooved frame that receives cutter held by a threaded ring 5 but the latter has a shoulder on the inside at one end that comes in cont-act with a shoulder on stock. This cannot be done in the smaller sizes, and necessitates the cutting away ofso much of the stock as to weaken and render it liable to twist.
What we claim is-- A tap consisting of the grooved tapered body A, threaded at b, the cutters B, arranged in grooves a, and the threaded ring C, all constructed substantially as shown and described.
LEWIS D. CASTLE. JOHN W. STRONG.
Witnesses:
JOHN B. RoLLINs, A. B. CHASE.
Publications (1)
Publication Number | Publication Date |
---|---|
US215264A true US215264A (en) | 1879-05-13 |
Family
ID=2284667
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US215264D Expired - Lifetime US215264A (en) | Improvement in taps |
Country Status (1)
Country | Link |
---|---|
US (1) | US215264A (en) |
-
0
- US US215264D patent/US215264A/en not_active Expired - Lifetime
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US430236A (en) | Island | |
US2283514A (en) | Tool and holder structure | |
US449887A (en) | Island | |
US215264A (en) | Improvement in taps | |
US412952A (en) | Charles elterich | |
US689555A (en) | Combined integral threading nut or die and common nut. | |
US894250A (en) | Drill-socket. | |
US308707A (en) | Reamer | |
US1155211A (en) | Die-holder. | |
US321755A (en) | Screw-cutting die | |
US1145822A (en) | Core-drill. | |
US166378A (en) | Improvement in augers | |
US55144A (en) | Improvement in augers | |
US258390A (en) | Geoege w | |
US1052400A (en) | Threading and inside-turning tool. | |
US218845A (en) | Improvement in screw-taps | |
US407868A (en) | Boring-bit | |
US1955447A (en) | Pipe reamer | |
US270216A (en) | Island | |
US1165822A (en) | Thread-cutting tool. | |
US637718A (en) | Tap. | |
US437385A (en) | Frederick j | |
US789866A (en) | Reamer-mandrel. | |
US471948A (en) | Angus cameron | |
US259903A (en) | chapman |