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US296242A - William steebs - Google Patents

William steebs Download PDF

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Publication number
US296242A
US296242A US296242DA US296242A US 296242 A US296242 A US 296242A US 296242D A US296242D A US 296242DA US 296242 A US296242 A US 296242A
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United States
Prior art keywords
extension
blade
william
screw
tangent
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Expired - Lifetime
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/03—Boring heads
    • B23B29/034—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings
    • B23B29/03403—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable before starting manufacturing
    • B23B29/03407—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable before starting manufacturing by means of screws and nuts
    • 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
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/83—Tool-support with means to move Tool relative to tool-support
    • Y10T408/85—Tool-support with means to move Tool relative to tool-support to move radially
    • Y10T408/858—Moving means including wedge, screw or cam
    • Y10T408/8598—Screw extending perpendicular to tool-axis

Definitions

  • N2 PETEFIS Flmwuibognpher. wmvigwk a c.
  • This invention relates to improvements in extension-bits for boring-tools; and it consists in the employment of an adjusting tangentscrew secured'in the stock, whereby the extension-blade can be easily, quickly, and accu- V which can be fitted to the brace-socket, or it may be used with a handle, like a common auger.
  • the screw-thread on the gimlet-point is continued around the cylindrical part B, for the purpose of feeding the cutter B.
  • A is the extension-blade, of steel, having a cutting-edge, a, and lip a.
  • extension-blade A On the back of the extension-blade A is a dovetailed tongue, at, which fits into a corresponding groove, 22, in the stock A. Also, on the back of extension-blade A are threads 0, cut to suit the threads on a tangent-screw, D, which is made to turn in a corresponding non- No model.)
  • tangent-screw D is secured by a screw, D, so that when the extension-blade A is properly adjusted the clamp G is screwed down, but not so tightened as to prevent the sliding of the extension-blade when operated by the tangent-screw D.
  • the dovetailed groove 1) in the stock A keeps the tongue a in the other edge of the extensionblade close to the stock, to prevent the blade from springing when in the act of cutting.
  • tangent-screw D is a slot for ascrewdriver, so that by turning the tangent-screw D in either direction the extension-blade A is moved correspondingly.
  • the tangent-screw D has a neck, e, and is secured by a pin, E, which passes through the stock and into the neck, to prevent the tangent-screw from being moved endwise when turned for the adjustment of the extension-blade, which is moved endwise by means of the threads on the back, and the nicest adjustment is obtained.
  • I claim- A center-bit stock having a continuation of the feeding-threads of the gimlet-point around the cylindrical part of the cutter, a tangentscrew secured by a neck and pin, a clamping device, and a dovetailed groove, in combination with an extension-blade having on its back a dovetailed ridge, and sore -threads to match the threads of the tangent-screw, substantially as and for the purpose described.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Description

W.- STEERS.
EXTENSION BIT.
(No Model.)
Patentd Apr. 1, 1884.
Fig. 2.
N2 PETEFIS. Flmwuibognpher. wmvigwk a c.
UNITED STATES PATENT OFFICE.
WILLIAM STEERS, OF BRATTLEBOBOUGH, VERMONT.
EXTENSION-BIT.
SPECIFICATION forming part of Letters Patent No. 296,242, dated April 1, 1884-.
Application filed January 19, 1884.
T at whom it may concern.-
Be it known that I, WILLIAM STEERs, a citizen of the United States, residing at Brattleborough, in the county of Windham and State of Vermont, have invented certain new and useful Improvements in Extension-Bits, of which the following is a specification, reference being had therein to the accompanying drawings. 7
This invention relates to improvements in extension-bits for boring-tools; and it consists in the employment of an adjusting tangentscrew secured'in the stock, whereby the extension-blade can be easily, quickly, and accu- V which can be fitted to the brace-socket, or it may be used with a handle, like a common auger. The screw-thread on the gimlet-point is continued around the cylindrical part B, for the purpose of feeding the cutter B.
A is the extension-blade, of steel, having a cutting-edge, a, and lip a.
On the back of the extension-blade A is a dovetailed tongue, at, which fits into a corresponding groove, 22, in the stock A. Also, on the back of extension-blade A are threads 0, cut to suit the threads on a tangent-screw, D, which is made to turn in a corresponding non- No model.)
1 threaded groove across the stock A. A clamp,
O, is secured by a screw, D, so that when the extension-blade A is properly adjusted the clamp G is screwed down, but not so tightened as to prevent the sliding of the extension-blade when operated by the tangent-screw D. The dovetailed groove 1) in the stock A keeps the tongue a in the other edge of the extensionblade close to the stock, to prevent the blade from springing when in the act of cutting. In the end of tangent-screw D isa slot for ascrewdriver, so that by turning the tangent-screw D in either direction the extension-blade A is moved correspondingly. The tangent-screw D has a neck, e, and is secured by a pin, E, which passes through the stock and into the neck, to prevent the tangent-screw from being moved endwise when turned for the adjustment of the extension-blade, which is moved endwise by means of the threads on the back, and the nicest adjustment is obtained.
I claim- A center-bit stock having a continuation of the feeding-threads of the gimlet-point around the cylindrical part of the cutter, a tangentscrew secured by a neck and pin, a clamping device, and a dovetailed groove, in combination with an extension-blade having on its back a dovetailed ridge, and sore -threads to match the threads of the tangent-screw, substantially as and for the purpose described.
In testimony whereof I aflix my signature in presence of two witnesses.
WILLIAM STEERS.
Witnesses:
J. G. EDDY, H. J. BURNHAM.
US296242D William steebs Expired - Lifetime US296242A (en)

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US296242A true US296242A (en) 1884-04-01

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US296242D Expired - Lifetime US296242A (en) William steebs

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2582574A (en) * 1948-11-29 1952-01-15 Harry D Woodside End thrust type rotary cutterhead

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2582574A (en) * 1948-11-29 1952-01-15 Harry D Woodside End thrust type rotary cutterhead

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