US87198A - Improved tool for cutting screw-threads - Google Patents
Improved tool for cutting screw-threads Download PDFInfo
- Publication number
- US87198A US87198A US87198DA US87198A US 87198 A US87198 A US 87198A US 87198D A US87198D A US 87198DA US 87198 A US87198 A US 87198A
- Authority
- US
- United States
- Prior art keywords
- tool
- screw
- threads
- improved tool
- cutting screw
- 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
- 210000003414 Extremities Anatomy 0.000 description 4
- 230000000153 supplemental Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000875 corresponding Effects 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
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G5/00—Thread-cutting tools; Die-heads
- B23G5/02—Thread-cutting tools; Die-heads without means for adjustment
- B23G5/04—Dies
-
- 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
- Y10T408/904—Tool or Tool with support with pitch-stabilizing ridge
Definitions
- Figure l is'a hack view of my improved tool.
- Figure 2 is a side View.
- Figure 3 is a front view
- Figure 4 is a cross-section of the same.
- Figure 5 is a longitudinal section of a screw, on an enlarged scale, ont by my improved tool.
- Figure 6 shows a horizontal section of the screw, and the position of the tool while cutting the thread.
- My invention consists in a tool which has twoinclined cutting-edges for forming the bottom of the groove between the threads, so as to give the endscf the-core', atthe-commencement of the thread and at the point of the screw, a conical form, and the intermediate part, the form of a low supplemental thread between the convolutions of the principal thread, shown in iig. 5.
- the tool is a straight steel bar, of the cross-section shown in 1i 4, having its extremity e ground oit' to the proper angle, back from the edges a and b, to form a cutting-tool, and to such lateral angle that, when the tool is in use, and held to the blank in a direction corresponding to the pitch ofthe thread, the plane of the said extremity shall lie parallel to the longitudinal axis of the blank.
- the sides of the groove c and the outside edges d d form the thread, and the edges a and b, the bottom of the groove.
- the tool is held to the blank in such position that the directionA of the groove c shall correspond to the direction or pitch of the thread, afiidis moved forward against and'laterally along the screw-blank in the manner usual in screw-cutting and threading machines.
- the tool tirst enters the screw at m, tig. 5, the edges a and b commence to cut, anda, following b, forms theconical part of the core to n, or so long as the tool is advanced toward the axis of the screw, after which the edge, b, also cuts part of the bottom of the groove, and the two finish the central core from a to o, in the form shown in tig. 5.
- the advantages of my invention are that it cuts a screw with a conical point to the core, and a supplemental thread along the cylindrical portion In o, whereby the screw is made to enter more easily and hold more firmly than' when the bottom of the groove is of a volute.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Description
,Staten Griffin.
Mem by 'nteutl ELIJAH S. PIERCE, OF HARTFORD, CONNECTICUT, ASSIG-NOR TOv .THE NATIONAL SCREW COMPANY, OF SAME PLACE.
Lette/rs Patent No. 87,198, (lated February 23, 1869.
IMPROVBD TOOL FOR CUTTING SCREW-THREADS.
The Schedule referred to in these Letters Patent and making part of lthe same.
To all whom it may concern.-
Be it known that I, ELIJAH S.P1EncE, of Hartford, in the county of Hartford, and State of Connecticut, have invented certain new and useful Improvements in Tools for Cutting Screws; and I dol hereby declare that the following is a full,'clear, and exact description thercof, whereby a person skilled in the art can make and use the same, reference being had to the accompanying drawings, andto the letters of reference marked thereon.
Like.- letters in the figures indicate the same parts.
Figure l is'a hack view of my improved tool.
Figure 2 is a side View.
Figure 3 is a front view, and
Figure 4 is a cross-section of the same.
Figure 5 is a longitudinal section of a screw, on an enlarged scale, ont by my improved tool.
Figure 6 shows a horizontal section of the screw, and the position of the tool while cutting the thread.
My invention consists in a tool which has twoinclined cutting-edges for forming the bottom of the groove between the threads, so as to give the endscf the-core', atthe-commencement of the thread and at the point of the screw, a conical form, and the intermediate part, the form of a low supplemental thread between the convolutions of the principal thread, shown in iig. 5.
The tool is a straight steel bar, of the cross-section shown in 1i 4, having its extremity e ground oit' to the proper angle, back from the edges a and b, to form a cutting-tool, and to such lateral angle that, when the tool is in use, and held to the blank in a direction corresponding to the pitch ofthe thread, the plane of the said extremity shall lie parallel to the longitudinal axis of the blank.
The sides of the groove c and the outside edges d d form the thread, and the edges a and b, the bottom of the groove. The tool is held to the blank in such position that the directionA of the groove c shall correspond to the direction or pitch of the thread, afiidis moved forward against and'laterally along the screw-blank in the manner usual in screw-cutting and threading machines.
XVhen the tool tirst enters the screw at m, tig. 5, the edges a and b commence to cut, anda, following b, forms theconical part of the core to n, or so long as the tool is advanced toward the axis of the screw, after which the edge, b, also cuts part of the bottom of the groove, and the two finish the central core from a to o, in the form shown in tig. 5.
From o to 11, the tool is again advanced, and the edge, a, finishes the conical portion of the core.'
The advantages of my invention are that it cuts a screw with a conical point to the core, and a supplemental thread along the cylindrical portion In o, whereby the screw is made to enter more easily and hold more firmly than' when the bottom of the groove is of a volute.
Publications (1)
Publication Number | Publication Date |
---|---|
US87198A true US87198A (en) | 1869-02-23 |
Family
ID=2156683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US87198D Expired - Lifetime US87198A (en) | Improved tool for cutting screw-threads |
Country Status (1)
Country | Link |
---|---|
US (1) | US87198A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3196518A (en) * | 1963-04-23 | 1965-07-27 | Williams Alvin | Lathe cutter bits |
-
0
- US US87198D patent/US87198A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3196518A (en) * | 1963-04-23 | 1965-07-27 | Williams Alvin | Lathe cutter bits |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US87198A (en) | Improved tool for cutting screw-threads | |
USRE3940E (en) | Improved tool for cutting- screw-threads | |
US56033A (en) | Improved tool for cutting twist-drills | |
US54096A (en) | Improved screw-tap | |
US3090A (en) | Method | |
US77211A (en) | Improvement in cutting-tools for planing and milling machines | |
US83348A (en) | Improvement in counter-sink | |
US82956A (en) | Improvement in expansive bits for wood-boring | |
US66641A (en) | John c | |
US73431A (en) | Edgab b | |
USRE3941E (en) | Improvement in screws | |
US119096A (en) | Improvement in hollow augers | |
US215005A (en) | Improvement in tools for turning the ends of spools | |
US82957A (en) | of new haven | |
US104335A (en) | Improvement in augers | |
US98943A (en) | Improved screw-tap | |
US2101379A (en) | Lathe tool | |
US83573A (en) | Improvement in tttrnijtg-tool | |
US613264A (en) | Thread-cutting tool | |
US61166A (en) | black | |
US89184A (en) | Improved tool for making- plugs for gas and water-cocks | |
US85542A (en) | Improvement in machine for producing uniform twist in table-cutlery | |
USRE3365E (en) | Improvement in hollow augers | |
US113531A (en) | Improvement in sawing-machines | |
US256668A (en) | Feederick k gakdnee |