US4990A - Improvement in chisels - Google Patents
Improvement in chisels Download PDFInfo
- Publication number
- US4990A US4990A US4990DA US4990A US 4990 A US4990 A US 4990A US 4990D A US4990D A US 4990DA US 4990 A US4990 A US 4990A
- Authority
- US
- United States
- Prior art keywords
- spring
- chisel
- chisels
- fairchild
- improvement
- 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
- 102100000672 SMPX Human genes 0.000 description 18
- 108060007673 SMPX Proteins 0.000 description 18
- 238000004140 cleaning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 210000001699 lower leg Anatomy 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27F—DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES
- B27F5/00—Slotted or mortised work
- B27F5/02—Slotting or mortising machines tools therefor
- B27F5/12—Slotting or mortising machines tools therefor for making holes designed for taking up fittings, e.g. in frames of doors, windows, furniture
Definitions
- the nature of our invention consists in the application of a spring upon the back of a chisel or between two chisels, permitting the chips to escape as they accumulate between the spring and chisel, thus ciearingthe chips from the nlortise, as hereinafter more fully described.
- Fig. 2 represents two chisels placed together, forming a double chisel with the spring placed between them, as shown by the dotted line a of the spring, the face side facing directly opposite the spring, so as to mortise in opposite directions without changing the chisel.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Forests & Forestry (AREA)
- Percussive Tools And Related Accessories (AREA)
- Cleaning In General (AREA)
Description
UNITED STATES PATENT OEEICE.
REUBEN FAIRCHILD AND STARR FAIRCHILD, OF TRUMYBULL, CONNECTICUT, ASSIGNORS TO STARR FAIRCHILD.
IMPROVEMENT IN CHISELS.
' Specification forming part of Letters Patent No. 4,990, dated February 27, 1847.
To all whom it may concern:
Be it known that we, REUBEN FAIRCHILD and STARR FAIRCHILD, ofTrumbull, in the county of Fairfield and State of Connecticut,
have invented a new and useful Improvement in Cleaning the Chips from the Mortises by the Operation of the Chisel in Mortising; and
we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings,Which form a part of the same, in Which- Figures l and 2 are section Views.
The nature of our invention consists in the application of a spring upon the back of a chisel or between two chisels, permitting the chips to escape as they accumulate between the spring and chisel, thus ciearingthe chips from the nlortise, as hereinafter more fully described.
To enable others skilled in the art to make and use our invention, We will proceed to describe its construction and operation.
VVeconstructour chiselsin anyof the known forms, and apply thereto a spring c, Fig. 1 in the accompanying drawings, upon the back of the chisel c, and extending to the edge at b, where there is an opening sufficient between the edge of the chisel and spring to allow the chips to enter and escape at the circular outlet g, said spring being attached to the shank of the chisel by means of screws D D passing through Vertical slots in the spring, so as to shift the spring upon the chisel as it isworn or ground off on the edge.
Fig. 2 represents two chisels placed together, forming a double chisel with the spring placed between them, as shown by the dotted line a of the spring, the face side facing directly opposite the spring, so as to mortise in opposite directions without changing the chisel.
What we claim as our invention, and desire to secure by Letters Patent, is
The application of a spring, in combination with chisels for mortising, for the purpose and in the manner specified.
REUBEN FAIRCHILD. STARR FAIRCHILD.
Witnesses:
JOHN C. BEAEDSLEE, HEZEKIAH S. NICHOLS.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US4990A true US4990A (en) | 1847-02-27 |
Family
ID=2065291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US4990D Expired - Lifetime US4990A (en) | Improvement in chisels |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US4990A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100011500A1 (en) * | 2008-07-17 | 2010-01-21 | Swierski Scott T | Deployable bed assembly for use with a conventional sofa, chair, or the like |
-
0
- US US4990D patent/US4990A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100011500A1 (en) * | 2008-07-17 | 2010-01-21 | Swierski Scott T | Deployable bed assembly for use with a conventional sofa, chair, or the like |
| US8209797B2 (en) | 2008-07-17 | 2012-07-03 | Swierski Scott T | Deployable bed assembly for use with a conventional sofa, chair, or the like |
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