US17925A - Improvement in cultivator-teeth - Google Patents
Improvement in cultivator-teeth Download PDFInfo
- Publication number
- US17925A US17925A US17925DA US17925A US 17925 A US17925 A US 17925A US 17925D A US17925D A US 17925DA US 17925 A US17925 A US 17925A
- Authority
- US
- United States
- Prior art keywords
- cultivator
- teeth
- boss
- improvement
- steel
- 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 16
- 239000010959 steel Substances 0.000 description 16
- 210000001699 lower leg Anatomy 0.000 description 10
- 229910001018 Cast iron Inorganic materials 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 241000366676 Justicia pectoralis Species 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000005266 casting Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B35/00—Other machines for working soil not specially adapted for working soil on which crops are growing
- A01B35/20—Tools; Details
- A01B35/22—Non-rotating tools; Resilient or flexible mounting of rigid tools
- A01B35/26—Rigid tools
Definitions
- the cultivatortooth has heretofore been made either all cast or of forged metal; but when forged, which experience has established to be the best, the portion exposed to wear should be made of steelfor greater durability, and the better to preserve a cutting-edge to cut roots in 'passing through the ground. When thus made it is very expensive, mainly on account of its peculiar form. It must be thin, on accountof the weight, and to admit of sharpening as it wears, and the upper part of the shank should be an enlarged boss, to present a broad surface to the beam, to which it is secured by a bolt,for if the shank be made in the form of a stem to pass through the beam .it soon becomes loose and must be renewed.
- my invention consists of a new manufacture of cultivatortooth, made of sheet-steel ofthe required thickness bent to the required form, with a boss cast on the upper end, presenting a large surface to fit against the under surface of the beam, and with a hole for a securing-bolt to pass through.
- 0. represents the cultivator-tooth, made of sheet-steel of the required and uniform thickness throughout, which, when heated, is simply bent to the required form on a mold or swage. The upper end is then sheared off to present fresh cut steel.
- the tooth thus formed is secured in a mold of the form required for the boss Z) at the upper end, the upper end or shank of the tooth being placed so as to extend about three quarters of an inch within the mold, and the cast-iron run into the mold around the shank; and as the upper end of the steel is fresh cut and clean, and being of steel,it is brought to such a high degree of heat by the molten cast-iron as to form a perfect union therewith, whilethat part of the cast-iron boss outside and inside of the boss in cooling contractsand gripes the steel shank,so as to hold it with great firmness.
- the hole for the screwbolt d by which the whole is secured to the beam, can be either drilled through the boss afterward or formed in the process of casting by a corein the usual way.
- I produce a new manufacture of cultivator-teeth which presents a thin steel blade of equal thickness throughout to admit of ready sharpening, of great strength .and lightness on account of the double-arched form, and with a broad and strong boss firmly united to it, by means of which and a simple bolt the whole can be connected with the beam in a firm and substantial manner, while at the same time it can be produced at much less cost than any wrought-metal tooth heretofore made.
- cultivator-tooth consisting of a sheet steel blade bent to the required form, with a cast-iron boss cast thereon, substantially as specified.
Description
UNITED STATES PATENT OFFICE.
F. R. FOBSYTHE, OF G APE VINCENT, NEW YORK.
IMPROVEM ENT IN CULTlVATOR-TEETH.
Specification forming part of Letters Patent No. 17,925, dated August 4, 1857.
To all whom it may concern:
Be it known that I, F. R. FORSYTHE, of Oape'Vincent, Jefferson county, and State of New York, have invented a new and useful Improvement in Cultivator-Teeth, ofwhich the followingis a full, clear, and exact description, reference being had to t he accompanying drawings, making part of this specification, in which Figure 1 isa perspective view of acultivatortooth made on my improved plan, and Fig.2 a longitudinal vertical section thereof.
The same letters indicate like parts in both the figures. r
The cultivatortooth has heretofore been made either all cast or of forged metal; but when forged, which experience has established to be the best, the portion exposed to wear should be made of steelfor greater durability, and the better to preserve a cutting-edge to cut roots in 'passing through the ground. When thus made it is very expensive, mainly on account of its peculiar form. It must be thin, on accountof the weight, and to admit of sharpening as it wears, and the upper part of the shank should be an enlarged boss, to present a broad surface to the beam, to which it is secured by a bolt,for if the shank be made in the form of a stem to pass through the beam .it soon becomes loose and must be renewed.
To obviate all thesedifliculties my invention consists of a new manufacture of cultivatortooth, made of sheet-steel ofthe required thickness bent to the required form, with a boss cast on the upper end, presenting a large surface to fit against the under surface of the beam, and with a hole for a securing-bolt to pass through.
In the accompanying drawings, 0. represents the cultivator-tooth, made of sheet-steel of the required and uniform thickness throughout, which, when heated, is simply bent to the required form on a mold or swage. The upper end is then sheared off to present fresh cut steel. The tooth thus formed is secured in a mold of the form required for the boss Z) at the upper end, the upper end or shank of the tooth being placed so as to extend about three quarters of an inch within the mold, and the cast-iron run into the mold around the shank; and as the upper end of the steel is fresh cut and clean, and being of steel,it is brought to such a high degree of heat by the molten cast-iron as to form a perfect union therewith, whilethat part of the cast-iron boss outside and inside of the boss in cooling contractsand gripes the steel shank,so as to hold it with great firmness. The hole for the screwbolt d, by which the whole is secured to the beam, can be either drilled through the boss afterward or formed in the process of casting by a corein the usual way. In this way I produce a new manufacture of cultivator-teeth which presents a thin steel blade of equal thickness throughout to admit of ready sharpening, of great strength .and lightness on account of the double-arched form, and with a broad and strong boss firmly united to it, by means of which and a simple bolt the whole can be connected with the beam in a firm and substantial manner, while at the same time it can be produced at much less cost than any wrought-metal tooth heretofore made.
What I claim as my invention, and desire,
to secure by Letters Patent, is-
The new manufacture of cultivator-tooth, consisting of a sheet steel blade bent to the required form, with a cast-iron boss cast thereon, substantially as specified.
F. n. FORSYTHE.
Witnesses:
JAMES FoRsYTHn, S. S. BURKE.
Publications (1)
Publication Number | Publication Date |
---|---|
US17925A true US17925A (en) | 1857-08-04 |
Family
ID=2080798
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17925D Expired - Lifetime US17925A (en) | Improvement in cultivator-teeth |
Country Status (1)
Country | Link |
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US (1) | US17925A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4412589A (en) * | 1982-07-19 | 1983-11-01 | Francis Thomas E | Earth clod pulverizer |
US4450916A (en) * | 1982-07-19 | 1984-05-29 | Francis Thomas E | Earth clod pulverizer |
KR20160108567A (en) * | 2012-03-12 | 2016-09-19 | 돌비 레버러토리즈 라이쎈싱 코오포레이션 | 3d visual dynamic range coding |
-
0
- US US17925D patent/US17925A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4412589A (en) * | 1982-07-19 | 1983-11-01 | Francis Thomas E | Earth clod pulverizer |
US4450916A (en) * | 1982-07-19 | 1984-05-29 | Francis Thomas E | Earth clod pulverizer |
KR20160108567A (en) * | 2012-03-12 | 2016-09-19 | 돌비 레버러토리즈 라이쎈싱 코오포레이션 | 3d visual dynamic range coding |
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