US181421A - Improvement in tabs for gang-saws - Google Patents
Improvement in tabs for gang-saws Download PDFInfo
- Publication number
- US181421A US181421A US181421DA US181421A US 181421 A US181421 A US 181421A US 181421D A US181421D A US 181421DA US 181421 A US181421 A US 181421A
- Authority
- US
- United States
- Prior art keywords
- tabs
- saws
- gang
- tab
- blade
- 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 4
- 239000010959 steel Substances 0.000 description 4
- 241000763859 Dyckia brevifolia Species 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D51/00—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends
- B23D51/08—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of devices for mounting straight saw blades or other tools
- B23D51/10—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of devices for mounting straight saw blades or other tools for hand-held or hand-operated devices
-
- 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
- Y10T83/00—Cutting
- Y10T83/929—Tool or tool with support
- Y10T83/9457—Joint or connection
- Y10T83/9473—For rectilinearly reciprocating tool
- Y10T83/9481—Tool is single element reciprocable along elongate cutting edge [e.g., saw blade, etc.]
Definitions
- the object of my invention is the secure attachment to a mill-saw blade of the tabs which are seized by the books or stirrups appertaining to saws of this class.
- Figure 1 represents the'upper portion of a mill-saw blade as it appears when prepared for attachment of the improved tab; Fig. 2, the same with the tab attached; Fig. 3, a transverse section; Fig. 4, a sectional plan on the line 1 2, and Fig. 5 a sectional view of the tab detached from the blade.
- the blade is of the usual construction, with this exception, that a concave recess, :20, is formed in the front or toothed edge of the blade, both at the upper and lower end of the same.
- the tab B consists of a single strip of steel, bent in the middle at m, so as to embrace and fit accurately to the blade to which the tab is riveted. At the point Where the tab is bent it is made convex on the inside, as indicated by the line y y in Fig. 4, and this conveX portion of the tab is arranged to fit snugly in the above-mentioned concave recess :20 of -11ame to this specification in the the blade.
- Tabs as usually attached to sawblades rely upon the rivets as mediums for resisting the strains to which they are subjected; but the tearing of the tabs from the blades in spite of the rivets is a common occurrence.
- the greatest tensile strain is exerted on mill-saw blades at the front or toothed edge of the same, and it is for the purpose of resisting this strain that the convex portion 3 of the tab is adapted to the recess 00 of the blade, both at the upper and lower end of the same.
- the rivets are consequently relieved from a great portion of the strain, and the tab is most securely fastened to the blade where the latter is subjected to the greatest resistance.
- the within-described tab composed of a strip of steel, bent as described, and having at the bend a convex portion, y, adapted to a recess, 00, in the blade, as set forth.
Description
H. DISSTON.
TABS FOR GANG-SAWS.
No. 181,421. Patented Aug-.22. 1876.
%.J y////////////////.. V//////////////// N. 9117513, PHOTO-UTNDGRAPNER, WASHINGTON D. C.
TATES PATENT FFIC.
HENRY DISSTON, OF PHILADELPHIA, PENNSYLVANIA.
IMPROVEMENT IN TABS FOR GANG-SAWS.
Specification forming part of Letters Patent N0. 18 L421, dated August 22, 1876 application filed July 10, 1876.
To all whom it may concern:
Be it known that I, HENRY DIssToN, of Philadelphia, Pennsylvania, have invented an Improvement in Tabs for Gang Saws, of which the following is a specification: I
The object of my invention is the secure attachment to a mill-saw blade of the tabs which are seized by the books or stirrups appertaining to saws of this class.
In the accompanying drawing, Figure 1 represents the'upper portion of a mill-saw blade as it appears when prepared for attachment of the improved tab; Fig. 2, the same with the tab attached; Fig. 3, a transverse section; Fig. 4, a sectional plan on the line 1 2, and Fig. 5 a sectional view of the tab detached from the blade.
The blade is of the usual construction, with this exception, that a concave recess, :20, is formed in the front or toothed edge of the blade, both at the upper and lower end of the same. The tab B consists of a single strip of steel, bent in the middle at m, so as to embrace and fit accurately to the blade to which the tab is riveted. At the point Where the tab is bent it is made convex on the inside, as indicated by the line y y in Fig. 4, and this conveX portion of the tab is arranged to fit snugly in the above-mentioned concave recess :20 of -11ame to this specification in the the blade. Tabs as usually attached to sawblades rely upon the rivets as mediums for resisting the strains to which they are subjected; but the tearing of the tabs from the blades in spite of the rivets is a common occurrence. The greatest tensile strain is exerted on mill-saw blades at the front or toothed edge of the same, and it is for the purpose of resisting this strain that the convex portion 3 of the tab is adapted to the recess 00 of the blade, both at the upper and lower end of the same. The rivets are consequently relieved from a great portion of the strain, and the tab is most securely fastened to the blade where the latter is subjected to the greatest resistance. 7
I claim as my invention- The within-described tab, composed of a strip of steel, bent as described, and having at the bend a convex portion, y, adapted to a recess, 00, in the blade, as set forth.
In testimony whereof I have signed my presence of two subscribing witnesses.
, HENRY DISSTON. Witnesses GEO. S. GANDY,
A. H. SHOEMAKER.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US181421A true US181421A (en) | 1876-08-22 |
Family
ID=2250827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US181421D Expired - Lifetime US181421A (en) | Improvement in tabs for gang-saws |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US181421A (en) |
-
0
- US US181421D patent/US181421A/en not_active Expired - Lifetime
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