US985283A - Drill. - Google Patents

Drill. Download PDF

Info

Publication number
US985283A
US985283A US50956309A US1909509563A US985283A US 985283 A US985283 A US 985283A US 50956309 A US50956309 A US 50956309A US 1909509563 A US1909509563 A US 1909509563A US 985283 A US985283 A US 985283A
Authority
US
United States
Prior art keywords
blade
shank
drill
tang
sides
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
Application number
US50956309A
Inventor
Lloyd W Pratt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEW PROCESS TWIST DRILL Co
Original Assignee
NEW PROCESS TWIST DRILL Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEW PROCESS TWIST DRILL Co filed Critical NEW PROCESS TWIST DRILL Co
Priority to US50956309A priority Critical patent/US985283A/en
Application granted granted Critical
Publication of US985283A publication Critical patent/US985283A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/005—Cylindrical shanks of tools
    • 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
    • Y10T408/89—Tool or Tool with support
    • Y10T408/907—Tool or Tool with support including detailed shank
    • 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
    • Y10T408/89—Tool or Tool with support
    • Y10T408/909—Having peripherally spaced cutting edges
    • Y10T408/9098—Having peripherally spaced cutting edges with means to retain Tool to support

Definitions

  • This invention has reference to improvements in drills and particularly to drills having blades having parallel sides.
  • the object of the invention is to so provide a drill blade formed of flat material with a cylindrical shank without unduly weakening the shank or the point of juncture between the blade and the shank and without materially increasing the cost of the same,
  • the invention consists in the drill as hereinafter described and claimed.
  • Figure 1 represents an elevation of the improved drill, parts of the blade being broken away.
  • Fig. 2 represents a sectional view of the same taken on line 22 Fig. 1.
  • Fig. 3 represents a sectional view of parts of the same taken on line 33 Fig. 2, the portion of the blade being shown in full.
  • Fig. 4 represents an end view of the shank to indicate the manner in which the socket is formed therein.
  • Fig. 5, represents a sectional view taken on line 55 Fig. 3, looking in the direction indicated by the arrows.
  • Drill blades of the nature particularly referred to herein are generally constructed from expensive high grade steel and are adapted for high speed machine work.
  • the blades are generally formed from approximately flat stock or stock having fiat sides, the stock being twisted and the edges then finished and ground.
  • the blades should be furnished with cylindrical, preferably tapering, shanks.
  • the drill shanks should be formed of a different grade or quality of steel and that the blade should be rigidly fixed to the shank.
  • I take a shank 5 of any usual shape and size preferably having a conical taper and the cylindrical enlargement 6.
  • I drill two holes 8-S; at distances from the periphery of the enlargement, and the material between these holes I cut away, preferably by milling, thereby forming a socket extending parallel with the shank and having flat sides and curved ends.
  • I now take the blade 9, usually having approximately rectangular edges, and, at the shank end thereof, I grind or shape such edges to form a tang, beyond the squared shoulders 1010, which tang has the flat sides 1l-11 and the rounded edges 12-l2 adapted to closely fit the corresponding parts of the socket above described.
  • the tang of theblade 9 is now inserted in the socket of the shank 5 and said blade is driven home until its shoulders 101O bear against the end 7 of the shank after which these parts are brazed together.
  • the tang of the blade 9 is embraced by a solid Wall of the material of the shank and is held firmly in place by a single continuous body of material. In use torsional strain on the blade 9 is resisted not only by the tensile strength of the peripheral portions of the shank but by the solid bodies of material bearing against the sides of the blade tang.
  • a drill comprising a blade rectangular in cross section and terminating in a tang having rounded edges, located within the cross sectional area of said blade, and fiat sides in the surface planes of the sides of said blade, whereby shoulders are formed on the end of said blade, and a shank having a socket having fiat walls and curved end walls to receive and closely embrace said tang, said shoulders of the blade bearing against the end of said shank at points separated from each other.

Landscapes

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

Description

L. W. PRATT.
DRILL.
APPLIOATION FILED JULY 2a, 1909.
985,283, Patented Feb.28, 1911.
Zflitnesses. Inventor.
ass at LLOYD W. PRATT, OF TAUNTON, MASSACHUSETTS, ASSIGNOR TO NEW PROCESS TWIST DRILL COMPANY, OF TAUNTON, MASSACHUSETTS, A CORPORATION OF MASSA- CHUSETTS.
DRILL.
Specification of Letters Patent.
Patented Feb. 28, 1911.
b all whom it may concern:
Be it known that I, LLoYn XV. PRATT, of Taunton, in the county of Bristol and State of Massachusetts, have invented certain new and useful Improvements in Drills, of which the following is a specification, reference being had to the accompanying drawings, forming part thereof.
This invention has reference to improvements in drills and particularly to drills having blades having parallel sides.
The object of the invention is to so provide a drill blade formed of flat material with a cylindrical shank without unduly weakening the shank or the point of juncture between the blade and the shank and without materially increasing the cost of the same,
The invention consists in the drill as hereinafter described and claimed.
Figure 1, represents an elevation of the improved drill, parts of the blade being broken away. Fig. 2, represents a sectional view of the same taken on line 22 Fig. 1. Fig. 3, represents a sectional view of parts of the same taken on line 33 Fig. 2, the portion of the blade being shown in full. Fig. 4, represents an end view of the shank to indicate the manner in which the socket is formed therein. Fig. 5, represents a sectional view taken on line 55 Fig. 3, looking in the direction indicated by the arrows.
Similar numbers of reference designate corresponding parts throughout.
Drill blades of the nature particularly referred to herein are generally constructed from expensive high grade steel and are adapted for high speed machine work. As a matter of economy, as well as to facilitate the process of manufacture, the blades are generally formed from approximately flat stock or stock having fiat sides, the stock being twisted and the edges then finished and ground. In order to adapt these blades to the holding devices of well known construction in general use it is desirable that the blades should be furnished with cylindrical, preferably tapering, shanks. Owing to the high cost of tungsten or other special steel from which the blade is formed and to the exigencies of its use it is desirable that the drill shanks should be formed of a different grade or quality of steel and that the blade should be rigidly fixed to the shank.
In carrying this invention into practice I take a shank 5 of any usual shape and size preferably having a conical taper and the cylindrical enlargement 6. In the end 7 of said enlargement I drill two holes 8-S; at distances from the periphery of the enlargement, and the material between these holes I cut away, preferably by milling, thereby forming a socket extending parallel with the shank and having flat sides and curved ends. I now take the blade 9, usually having approximately rectangular edges, and, at the shank end thereof, I grind or shape such edges to form a tang, beyond the squared shoulders 1010, which tang has the flat sides 1l-11 and the rounded edges 12-l2 adapted to closely fit the corresponding parts of the socket above described. The tang of theblade 9 is now inserted in the socket of the shank 5 and said blade is driven home until its shoulders 101O bear against the end 7 of the shank after which these parts are brazed together. By this construction the tang of the blade 9 is embraced by a solid Wall of the material of the shank and is held firmly in place by a single continuous body of material. In use torsional strain on the blade 9 is resisted not only by the tensile strength of the peripheral portions of the shank but by the solid bodies of material bearing against the sides of the blade tang.
Having thus described my invention, I claim as new and desire to secure by Letters Patent A drill comprising a blade rectangular in cross section and terminating in a tang having rounded edges, located within the cross sectional area of said blade, and fiat sides in the surface planes of the sides of said blade, whereby shoulders are formed on the end of said blade, and a shank having a socket having fiat walls and curved end walls to receive and closely embrace said tang, said shoulders of the blade bearing against the end of said shank at points separated from each other.
LLOYD TV. PRATT. lVi tnesses H. J. MILLER, M. M. HAnmNo'roN.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,
US50956309A 1909-07-26 1909-07-26 Drill. Expired - Lifetime US985283A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US50956309A US985283A (en) 1909-07-26 1909-07-26 Drill.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US50956309A US985283A (en) 1909-07-26 1909-07-26 Drill.

Publications (1)

Publication Number Publication Date
US985283A true US985283A (en) 1911-02-28

Family

ID=3053627

Family Applications (1)

Application Number Title Priority Date Filing Date
US50956309A Expired - Lifetime US985283A (en) 1909-07-26 1909-07-26 Drill.

Country Status (1)

Country Link
US (1) US985283A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2590766A (en) * 1949-01-22 1952-03-25 Cleveland Twist Drill Co Method of forming tool blanks
US2623418A (en) * 1948-10-20 1952-12-30 Wright Tool And Forge Company Method for making wrench sockets
US2794468A (en) * 1952-12-04 1957-06-04 Millers Falls Co Woodcutting bit assembly

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2623418A (en) * 1948-10-20 1952-12-30 Wright Tool And Forge Company Method for making wrench sockets
US2590766A (en) * 1949-01-22 1952-03-25 Cleveland Twist Drill Co Method of forming tool blanks
US2794468A (en) * 1952-12-04 1957-06-04 Millers Falls Co Woodcutting bit assembly

Similar Documents

Publication Publication Date Title
EP1185391B1 (en) Machining tool
US985283A (en) Drill.
US542223A (en) Drilling-tool
US1235604A (en) Routing-cutter.
US1208164A (en) Drill.
US516602A (en) Third to reynderdt schuuman
US894250A (en) Drill-socket.
US926845A (en) Drill-socket.
US1052400A (en) Threading and inside-turning tool.
US1733594A (en) Method of manufacturing centers
US546041A (en) Twist-drill
US837490A (en) Bit.
US988903A (en) Drill.
US777543A (en) Drill.
US409696A (en) David m
US1018096A (en) Drilling apparatus.
US893162A (en) Twist-drill.
US1145822A (en) Core-drill.
US306907A (en) William m
US958751A (en) Clamp for mending broken trolley-poles and other articles.
US1478451A (en) Drill
US982832A (en) Pickax.
US706184A (en) Tool.
US122426A (en) Improvement in shaft-couplings
US1035270A (en) Drill.