US1158532A - Commutator-turning tool. - Google Patents

Commutator-turning tool. Download PDF

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Publication number
US1158532A
US1158532A US4169115A US4169115A US1158532A US 1158532 A US1158532 A US 1158532A US 4169115 A US4169115 A US 4169115A US 4169115 A US4169115 A US 4169115A US 1158532 A US1158532 A US 1158532A
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US
United States
Prior art keywords
tool
commutator
bars
tools
turning
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
US4169115A
Inventor
John Moles
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.)
Eureka Co
Original Assignee
Eureka 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 Eureka Co filed Critical Eureka Co
Priority to US4169115A priority Critical patent/US1158532A/en
Application granted granted Critical
Publication of US1158532A publication Critical patent/US1158532A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/10—Bits for countersinking
    • B23B51/108—Bits for countersinking having a centering drill
    • 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
    • Y10T408/905—Having stepped cutting edges
    • Y10T408/906—Axially spaced
    • 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
    • Y10T408/90993—Screw driven means

Definitions

  • This invention relates to commutator turning tools and consists in certain improvements in the construction thereof as will be hereinafter fully described and pointed out in the claims.
  • commutator bars In the turning of commutator bars it has been the practice to assemble these bars with insulating material between them in their final annular position anduto clamp the bars so assembled so that the surfaces of the bars may be turned.
  • the ordinary commutator bars have the insides of the bars turned and are also provided with anchor parts which with the bars assembled form a dove-tail ring .on the inner periphery of the commutator; Difliculty has been experienced in turning the insides of the bars and the beveled surfaces of these anchor parts with rapidity.
  • the object of this invention is to accomplish'this purpose in a better manner than has been heretofore practised and to provide the tool for so accomplishing the pur- )OSG.
  • the first 'tool 3 has a cutting edge 10 which is adapted to turn the inner surface 11 of the bars 11.
  • the tool must have a. clearance sufficient to avoid cutting the face of the anchor part 13 because if the rear of the back edge of the tool engages the face of the anchor pieces 13.
  • This tool should have clearance enough to avoid cutting the surface 11 so that the accuracy of the cutting device 12 is not interfered with. In this way the two surfaces, the face of the anchor parts and the surface 11 may be cut with great rapidity and with great accuracy.
  • the sharp groove such as is formed by the commutator bars between the inner surface of the commutator and the anchor pieces presents great dilficiilty even where the material turned is solid but where there is a variation as in commutator bars andtheir insulating material the difficulty precludes ordinary methods and the operation has been heretofore very slow.
  • a tool 14- is carried by an extension 15 on the shank 1 and secured in place by the set screws 16. This is designed to operate in advance of the tools 3 and 5 and to turn the inner' surfaces of the anchor parts.
  • second of said tools having a cutting edge extending on a slant to the axis of the tool to'form the face of the anchor part of the bars and having a clearance to avoid cut ting the inner surface of the bars, the ends of said tools being in a plane at right angles to the axis.
  • a commutator turning tool the com- I bination of a shank; cutting tools carried by the shank, the first of said tools having a cutting edge extending in an axial direction to turn the inner surfaces of assembled commutator bars, the end of said first tool having a clearance to avoid cutting the anchor part of such bars, and the second of said tools having a cuttingedge extend- 'ing on a slant to the axis of the tool to form the face of the anchor part of the bars and
  • I have hereunto set havln e clearance to avoid euttni the inmy hand in the presence 01' two subscribing ner surface of the bars, the ends of said witnesses.
  • tools being in apiane at' right angles to JOHN MOLES. the axis; and a third tool in advance of the witnesseses:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Current Collectors (AREA)

Description

J. MOLES. CO'MMUTATOR TURNING. TO0L. APPLICATION FILED JULY 24. !915.
w N d m m P JOHN MOLES, OF ERIE, PENNSYLVANIA, ASSIGNOR '10 THE EUREKA COMPANY, OF NORTH EAST, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.
COMMUTATOR-TURNING TOOL.
Specification of Letters Patent.
Patented Nov. 2,- 1915.
Application filed July 24, 1915. ,Serial No. 41,691.
T 0 all whom it may concern:
zen of the United States, residing at Erie, in the county of Erie and State of Penn sylvania, have invented new and useful Improvements in Commutator-Turning Tools, of which the following is a specification.
This invention relates to commutator turning tools and consists in certain improvements in the construction thereof as will be hereinafter fully described and pointed out in the claims.
In the turning of commutator bars it has been the practice to assemble these bars with insulating material between them in their final annular position anduto clamp the bars so assembled so that the surfaces of the bars may be turned. The ordinary commutator bars have the insides of the bars turned and are also provided with anchor parts which with the bars assembled form a dove-tail ring .on the inner periphery of the commutator; Difliculty has been experienced in turning the insides of the bars and the beveled surfaces of these anchor parts with rapidity. M
The object of this invention is to accomplish'this purpose in a better manner than has been heretofore practised and to provide the tool for so accomplishing the pur- )OSG.
I The invention is illustrated in the accompanying drawing wherein 1 marks the shank of the tool, 2 the tool holder, and 3 a first tool which is secured to the tool holder by extending into the tool holder and being clamped therein by set screws 4.
5 is a second tool extending into the tool holder and being clamped therein by set screws 6.
7 is a stop for ment of the t'ool tator, this stop holder and being limiting the axial moverelatively to the commuextending into the tool clamped therein by a set screw 9. The first 'tool 3 has a cutting edge 10 which is adapted to turn the inner surface 11 of the bars 11. The tool must have a. clearance sufficient to avoid cutting the face of the anchor part 13 because if the rear of the back edge of the tool engages the face of the anchor pieces 13.
This tool should have clearance enough to avoid cutting the surface 11 so that the accuracy of the cutting device 12 is not interfered with. In this way the two surfaces, the face of the anchor parts and the surface 11 may be cut with great rapidity and with great accuracy. The sharp groove such as is formed by the commutator bars between the inner surface of the commutator and the anchor pieces presents great dilficiilty even where the material turned is solid but where there is a variation as in commutator bars andtheir insulating material the difficulty precludes ordinary methods and the operation has been heretofore very slow.
A tool 14- is carried by an extension 15 on the shank 1 and secured in place by the set screws 16. This is designed to operate in advance of the tools 3 and 5 and to turn the inner' surfaces of the anchor parts.
It will be readily observed that the ends of the tools 3 and 5 are practically in a plane at right angles to the axis of the tool. This is necessary in order that, the tool 5 may be utilized only for cutting the surfaces of the anchor parts and the tool 3 fo the inner surfaces of the bars. I
.What I claim as new is 1. In a commutator turning tool, the combination of a shank; andcutting tools carried by the shank, the first of said tools hav ing a. cutting edge extending in an axial.
second of said tools having a cutting edge extending on a slant to the axis of the tool to'form the face of the anchor part of the bars and having a clearance to avoid cut ting the inner surface of the bars, the ends of said tools being in a plane at right angles to the axis.
:2. In a commutator turning tool, the com- I bination of a shank; cutting tools carried by the shank, the first of said tools having a cutting edge extending in an axial direction to turn the inner surfaces of assembled commutator bars, the end of said first tool having a clearance to avoid cutting the anchor part of such bars, and the second of said tools having a cuttingedge extend- 'ing on a slant to the axis of the tool to form the face of the anchor part of the bars and In testimony whereof I have hereunto set havln e clearance to avoid euttni the inmy hand in the presence 01' two subscribing ner surface of the bars, the ends of said witnesses. tools being in apiane at' right angles to JOHN MOLES. the axis; and a third tool in advance of the Witnesses:
first and second tools for turning the inner B. M. HAn'rMAN, surface of the anchor part of the bars.
THOMAS C. MILLER.
US4169115A 1915-07-24 1915-07-24 Commutator-turning tool. Expired - Lifetime US1158532A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US4169115A US1158532A (en) 1915-07-24 1915-07-24 Commutator-turning tool.

Applications Claiming Priority (1)

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US4169115A US1158532A (en) 1915-07-24 1915-07-24 Commutator-turning tool.

Publications (1)

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US1158532A true US1158532A (en) 1915-11-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4533285A (en) * 1983-06-09 1985-08-06 Everede Tool Company Cutting attachment for boring tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4533285A (en) * 1983-06-09 1985-08-06 Everede Tool Company Cutting attachment for boring tool

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