US430094A - The kohbis petefls co - Google Patents

The kohbis petefls co Download PDF

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Publication number
US430094A
US430094A US430094DA US430094A US 430094 A US430094 A US 430094A US 430094D A US430094D A US 430094DA US 430094 A US430094 A US 430094A
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Prior art keywords
petefls
kohbis
dynamo
block
commutators
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Expired - Lifetime
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D71/00—Filing or rasping tools; Securing arrangements therefor
    • 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
    • Y10T407/00—Cutters, for shaping
    • Y10T407/18—File or rasp

Definitions

  • This invention relates to certain improvements in a tool Whereby the faces of dynamo- :o commutators and other rotative cylindrical objects which have become WOI'Il may be trued or brought to an accurate cylindrical shape while the same is in motion, as will hereinafter fully appeal'.
  • the said invention consists in a segmental toothed block having suitable handles, whereby the same may be held to the surface to be repaired.
  • the length of the block A is preferably the sane as that of the face of the commutator or obj ect to be filed.
  • Commutators if not properly watched and 4o attended to, become grooved and fiattened by the action of the brushes, and they are generally taken from the machine and turned, so as to be again true, in a lathe. This operation of course renders the dynamo of no use for the time, and the truing operation is expensive.
  • the commutator may be put in complete order by holding with both hands the device described against its cylindrical surface until the irregular projections on the same are removed.
  • the commutator is shown in dotted lines in Fig. 1 and marked O.
  • One of the handles c may be thrown up, as shown in dotted lines in Fig. 1, if desired.

Description

(No Model.)
A. D. SPENOER. TOOL FOR TRUING DYNAMO GOMMUTATORS. No. 430,094. Patented June 10, 1890.
-WITNEEEEE- INVENTIJFL- m: NW uuuu uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu c.
UNITED STATES PATENT IOFFICE.
ALLEN DUNTON SPENCER, OF BALTIMORE, MARYLAND, ASSIGNOR OF ONE- THIRD TO RICHARD M. WVALLACE, OF SAME PLACE.
TOOL FOR TRUING DYNAMO-COMMUTATORS.
SPECIFICATION forming part of Letters Patent No. 430,094, dated J' une 10, 1890.
Application filed February 1890. Serial No. 340,524. (No model.)
To all whmn it may concern:
Be it known that I, ALLEN DUNTON SPEN- CER, of the city of Baltimore, and State of Maryland, have invented certain Improve- 5 ments in Tools for Truing Dynamo-Commutators, of which the following is a specification.
This invention relates to certain improvements in a tool Whereby the faces of dynamo- :o commutators and other rotative cylindrical objects which have become WOI'Il may be trued or brought to an accurate cylindrical shape while the same is in motion, as will hereinafter fully appeal'.
:5 The said invention consists in a segmental toothed block having suitable handles, whereby the same may be held to the surface to be repaired.
In the further description of the said in- 'o vention which follows reference is made to denoted by a, is serrated or toothed after the manner of afile, and its curvature is made as nearly as possible to correspond with the circumference of the Object to be trued. The
back Z) of the block is flat, and to it is secured 3 5 by means of screws c a bar d, having the handles c at its ends. The length of the block A is preferably the sane as that of the face of the commutator or obj ect to be filed.
Commutators, if not properly watched and 4o attended to, become grooved and fiattened by the action of the brushes, and they are generally taken from the machine and turned, so as to be again true, in a lathe. This operation of course renders the dynamo of no use for the time, and the truing operation is expensive.
The commutator may be put in complete order by holding with both hands the device described against its cylindrical surface until the irregular projections on the same are removed.
The commutator is shown in dotted lines in Fig. 1 and marked O. One of the handles c may be thrown up, as shown in dotted lines in Fig. 1, if desired.
I claim as my invention- A tool for the purpose described, which consists of a hardened steel block with a segnental toothed face, combined With a bar secured transversely of the back of the block, and ahandle at each end of the bar, substantially as and for the purpose specified.
ALLEN DUNTON SPENOER.
VVitnesses:
WM. T. I-IOWARD, DANL. FISHER.
US430094D The kohbis petefls co Expired - Lifetime US430094A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4608243A (en) * 1983-04-04 1986-08-26 Borg-Warner Corporation High hardness hafnium nitride
US6494647B1 (en) * 1999-06-10 2002-12-17 Ronald D. Schritz Curved file apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4608243A (en) * 1983-04-04 1986-08-26 Borg-Warner Corporation High hardness hafnium nitride
US6494647B1 (en) * 1999-06-10 2002-12-17 Ronald D. Schritz Curved file apparatus

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