US142445A - Improvement in files - Google Patents
Improvement in files Download PDFInfo
- Publication number
- US142445A US142445A US142445DA US142445A US 142445 A US142445 A US 142445A US 142445D A US142445D A US 142445DA US 142445 A US142445 A US 142445A
- Authority
- US
- United States
- Prior art keywords
- file
- files
- blank
- improvement
- saw
- 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
- 238000007373 indentation Methods 0.000 description 8
- 239000002184 metal Substances 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 238000005242 forging Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 241001435619 Lile Species 0.000 description 2
- 229910000635 Spelter Inorganic materials 0.000 description 2
- 210000003813 Thumb Anatomy 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 210000001699 lower leg Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000007787 solid Substances 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
- B23D73/00—Making files or rasps
Definitions
- the object of my invention is fto economize the manuf'acture of saw -flles and improve their quality by making them' of straight pieces of steel of the desired sectional form and distending them so as to impart the desired taper to the flles by a longitudinal indentation made in each of their flat sides, as shown in Figs. 1, 2, and 3 of the accompanying drawing.
- ⁇ A further object of my invention is to afford better facilities than heretofore for the proper and effective manipulation of a sawle by providing its outer end with a tip, a, on which the operators thumb can bear without discomfort.
- each blank is reduced to the desired tapering shape at its outer end m, and a shank, y, formed at its opposite end bythe usual forging process, which, however, is not permitted to disturb the main body of the blank.
- the blank is placed in a recess formed in a die, d, Fig. 3, and a longitudinal indentation, e, is made in it by atool, f, attached to a droppress, the tool having a rounded edge of such a form that the indentation will insure the lateral distension of the blank necessary for imparting the desired rounded edges to the lile.
- each side of the blank After each side of the blank has been thus distcnded, it may be ground and polished prior to the cutting of. the teeth, in the usual manner, after which the file may be hardened. If desired, the indentations and distension ofthe blank may be made by a rolling process.
- a saw-file having at the outer end a tip, @secured to or forming part of the file, as set forth.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling, Broaching, Filing, Reaming, And Others (AREA)
Description
HENRY DISSTON, OF'PHILADELPHIA, PENNSYLVANIA.
IMPROVEMENTIN FILES.
Specification forming part of Letters Patent No. 142,445, dated September 2, 1873; application filed April 18,' 1873.
To all whom it may concern:
Be it known that. I, HENRY DissroN, of the city and countyY of Philadelphia, State of Pennsylvania, have invented' an Improved Saw-File, of which the following is a specilication:
The object of my invention is fto economize the manuf'acture of saw -flles and improve their quality by making them' of straight pieces of steel of the desired sectional form and distending them so as to impart the desired taper to the flles by a longitudinal indentation made in each of their flat sides, as shown in Figs. 1, 2, and 3 of the accompanying drawing. `A further object of my invention is to afford better facilities than heretofore for the proper and effective manipulation of a sawle by providing its outer end with a tip, a, on which the operators thumb can bear without discomfort.
The blanks, Fig.' 1, are, in the first instance,
cut from a rolled parallel bar of steel of the desired triangular sectional form, and each blank is reduced to the desired tapering shape at its outer end m, and a shank, y, formed at its opposite end bythe usual forging process, which, however, is not permitted to disturb the main body of the blank. After this operation the blank is placed in a recess formed in a die, d, Fig. 3, and a longitudinal indentation, e, is made in it by atool, f, attached to a droppress, the tool having a rounded edge of such a form that the indentation will insure the lateral distension of the blank necessary for imparting the desired rounded edges to the lile. After each side of the blank has been thus distcnded, it may be ground and polished prior to the cutting of. the teeth, in the usual manner, after which the file may be hardened. If desired, the indentations and distension ofthe blank may be made by a rolling process.
By the above-described plan of shaping the le much of the usual labor is avoided, as that exactitude of shape, which has hitherto been accomplished by tedious forging and grinding, is produced by a few blows with a properlyshaped tool.
Another source of economy due to this mode of shaping the file is experienced in cutting the teeth, an operation rendered more easy by the presence of the longitudinal indentations. A more perfect hardening of the file also results from the indentations, for the mass of metal in a solid file interferes with the equal hardening throughout, whereas the indentations permit the equal action of the hardening fluids throughout the metal. To form the tip a of the le I prefer to cut a few notches on `the point of the file and then insert it into a two part mold having a cavity of the same shape as the desired tip, and then to pour into the mold type-metal, spelter, or other alloy which will melt at a comparatively low temperature and be of sufficient hardness when cool. v
I do not claim broadly a tip for files, as this may form the subject of a separate application for Letters Patent; but
I claim as my inventionl. The method of shaping saw-le blanks, byhjrnaking therein longitudinal indentation s, as herein set forth.
2. As a new manufacture, a saw-file having the within described longitudinal indentations.
3. A saw-file, having at the outer end a tip, @secured to or forming part of the file, as set forth.
In testimony whereof l have signed my name to this specification in the presence of two subscribing witnesses.
HENRY DISSTONI Witnesses: A. H. SHOEMAKER.,
SAMUEL BEVAN.
Publications (1)
Publication Number | Publication Date |
---|---|
US142445A true US142445A (en) | 1873-09-02 |
Family
ID=2211858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US142445D Expired - Lifetime US142445A (en) | Improvement in files |
Country Status (1)
Country | Link |
---|---|
US (1) | US142445A (en) |
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0
- US US142445D patent/US142445A/en not_active Expired - Lifetime
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