US157212A - Improvement in bit-stocks - Google Patents
Improvement in bit-stocks Download PDFInfo
- Publication number
- US157212A US157212A US157212DA US157212A US 157212 A US157212 A US 157212A US 157212D A US157212D A US 157212DA US 157212 A US157212 A US 157212A
- Authority
- US
- United States
- Prior art keywords
- bit
- level
- stocks
- improvement
- brace
- 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
- 210000001699 lower leg Anatomy 0.000 description 8
- 210000002832 Shoulder Anatomy 0.000 description 6
- 230000000875 corresponding Effects 0.000 description 6
- 238000005553 drilling Methods 0.000 description 2
- 230000002441 reversible Effects 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
- B23B45/06—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor driven by man-power
Definitions
- This invention consists in combining a spiritlevel with an ordinary carpenters brace or bitstock, the object of which is to secureaccuracy in leveling a bit or drill, or obtaining the perpendicular or any desired angle of the same, while boring or drilling.
- Figure l is a side elevation of my invention.
- Fig. 2 is a sectional view of the same.
- the spirit-level A is attached just in the rear of the socket.
- the brace being recessed at the point for the purpose, the level is provided with a round shank, which passes through the brace and is secured by a screwnut, a, on the end of said shank.
- the level is designed to be adjusted to any angle, and the degrees may be indicated on the brace or level for the purpose.
- a de- -vice is employed to set the level at right angles, there being a tooth, b, on the shoulder of the level, which fits into corresponding recesses in the shoulder formed on the brace at the proper points to secure a level and perpendicular; but this device is not essentially necessary.
- the shoulders may be smooth, and, as already observed, the degrees may be simply marked thereon, in which case the adjustment must be sufficiently close and tight as not to be disturbed by the motion of the brace while in use.
- a coil or other suitable spring, (2, is employed in combination with the level, as shown.
- a hole passes through the brace intersecting with an angle of the socket, through which a pin, 6, is inserted, said pin having a V-shaped groove cut in its side corresponding with the angle of the socket, as shown, the shank of the bit or drill having a semicircular groove cut across one of its edges corresponding with the size and position of said pin.
- the pin is turned so that the grooved side is in juxtaposition with the socket.
- the bit is then inserted in the socket with its grooved side opposite to the pin, which, on being turned partially around brings the conveX side of said pin into the groove formed into the shank of the bit and secures it in position.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
Patented Nov. 24, 1874.
Bit-St ll- L E H c T M s .L
EB. Z Q
UNITED STATES PATENT QFFICE.
JOHN S. MITCHELL, OF NEWARK, NEW JERSEY.
IMPROVEMENT IN BIT-STOCKS.
Specification forming part of Letters Patent No. 157,212, dated November 24, 1874; application filed June 25,1874.
To all whom it may concern:
Be it known that I, JOHN S. MITCHELL, of the city of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Bit- Stocks; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.
This invention consists in combining a spiritlevel with an ordinary carpenters brace or bitstock, the object of which is to secureaccuracy in leveling a bit or drill, or obtaining the perpendicular or any desired angle of the same, while boring or drilling.
Figure l is a side elevation of my invention. Fig. 2 is a sectional view of the same.
The spirit-level A is attached just in the rear of the socket. The brace being recessed at the point for the purpose, the level is provided with a round shank, which passes through the brace and is secured by a screwnut, a, on the end of said shank.
The level is designed to be adjusted to any angle, and the degrees may be indicated on the brace or level for the purpose.
In the present illustration, however, a de- -vice is employed to set the level at right angles, there being a tooth, b, on the shoulder of the level, which fits into corresponding recesses in the shoulder formed on the brace at the proper points to secure a level and perpendicular; but this device is not essentially necessary. The shoulders may be smooth, and, as already observed, the degrees may be simply marked thereon, in which case the adjustment must be sufficiently close and tight as not to be disturbed by the motion of the brace while in use. When the tooth-and recesses above described are used a coil or other suitable spring, (2, is employed in combination with the level, as shown.
The manner of securing the bit in the stock is as follows: A hole passes through the brace intersecting with an angle of the socket, through which a pin, 6, is inserted, said pin having a V-shaped groove cut in its side corresponding with the angle of the socket, as shown, the shank of the bit or drill having a semicircular groove cut across one of its edges corresponding with the size and position of said pin. The pin is turned so that the grooved side is in juxtaposition with the socket. The bit is then inserted in the socket with its grooved side opposite to the pin, which, on being turned partially around brings the conveX side of said pin into the groove formed into the shank of the bit and secures it in position.
I am aware of the patent granted to A. Amory July 27, 1869, No. 92,927, and hereby disclaim the same.
What I claim as HGWyELHd. desire to secure by Letters Patent of the United States, is-
The combination of the bit-stock with the reversible level A, having the nut a, spring 0, and catch 1), substantially as shown and described.
In testimony that I claim the foregoing as my own invention I aflix hereunto my signature in presence of two witnesses.
JOHN S. MITCHELL.
Witnesses Gno. H. WILsoN, Gno. W. FRANCIS.
Publications (1)
Publication Number | Publication Date |
---|---|
US157212A true US157212A (en) | 1874-11-24 |
Family
ID=2226622
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US157212D Expired - Lifetime US157212A (en) | Improvement in bit-stocks |
Country Status (1)
Country | Link |
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US (1) | US157212A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11255666B1 (en) * | 2018-02-09 | 2022-02-22 | Michael O'Donnell | Level for use with drills |
-
0
- US US157212D patent/US157212A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11255666B1 (en) * | 2018-02-09 | 2022-02-22 | Michael O'Donnell | Level for use with drills |
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