US945270A - Device for grinding commutators or collecting-rings. - Google Patents

Device for grinding commutators or collecting-rings. Download PDF

Info

Publication number
US945270A
US945270A US47029909A US1909470299A US945270A US 945270 A US945270 A US 945270A US 47029909 A US47029909 A US 47029909A US 1909470299 A US1909470299 A US 1909470299A US 945270 A US945270 A US 945270A
Authority
US
United States
Prior art keywords
grinding
commutators
rings
collecting
emery cloth
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
US47029909A
Inventor
William Gerb
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US47029909A priority Critical patent/US945270A/en
Application granted granted Critical
Publication of US945270A publication Critical patent/US945270A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
    • B24D15/02—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface
    • B24D15/023—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface using in exchangeable arrangement a layer of flexible material

Definitions

  • My invention' relates to an improved device for grinding or polishing the commutators or collecting-rings of dynamo-electric machines in a very effective and convenient manner.
  • my invention stretch a band of pliable material between the ends of a bent resilient electrically non-conducting handle and attach one or more strips of emery cloth or the like at one side of the device in front of the band. 'When the device is pressed against the surface to be ground or polished, the band faced with the emery cloth adapts itself to the rounded surface, fitting tightly to it, whereby an extremely vigorous abrasive effect is produced, which present a more or less rigid abrasive surface.
  • My invention is illustrated in the accon1- panying drawing, in which the figure is a section through one form of the new device.
  • A is a bowed electrically non-conducting handle, which may for instance be made of vulcanite, liber, india-rubber covered steel, etc., and which owing to the curved shape possesses a certain degree of resilience.
  • a iexible band such as a piece of webbingl B.
  • strips J of emery cloth or the like are attached, the other extremity of such strip or strips being free.
  • lVhen a plu ality of strips is employed, they may be of different degrees of fineness.
  • the device In use, the device is grasped by the handle A and applied to the surface to be treated, against which the emery cloth thus lies. On the exertion of increased pressure upon the handle, the web B with the emery cloth 011 its face is caused to adapt itself exactly to the surface to be treated, which will thus be most effectively ground or polished by the entire surface of the emery cloth. The grinding is thus rendered exceedingly rapid and uniform. Mica insulation projecting from the face of the commutators can be most thoroughly removed by the new device.
  • a device for grinding or polishing commutators or collecting-rings comprising a bent resilient electrically non -conducting handle, and a pliable band stretched between the ends thereof and faced with a ⁇ flexible strip presenting an abrasive surface, substantially as described.

Landscapes

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

Description

W. GERB.
DEVICE FOR GRINDING COMMUTATORS 0R COLLECTING RINGS.
APPLICATION FILED JAN. 2, 1909.
Patented Jan. 4, 1910.
- WI' [fz 655 6,5.' fm/072 laf.' ZM @au @74M 95d,
WILLIAM GERB, 0F BERLIN, GERMANY.
DEVICE FOR GRINDING- COMMITTATORS OR COLLECTING-RINGS.
Specification of Letters Patent.
Patented Jan. 4, 1910.
Application led January 2, 1909. Serial No. 470,299.
To all whom 'it may concern:
Be it known that I, VILLIAM GERB, a subject of the King of Prussia, residing at Berlin, in the Kingdom of Prussia, German Empire, have invented certain new and useful Improvements in Devices for Grinding Commutators or Collecting-Rings', and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.
My invention' relates to an improved device for grinding or polishing the commutators or collecting-rings of dynamo-electric machines in a very effective and convenient manner.
According to my invention I stretch a band of pliable material between the ends of a bent resilient electrically non-conducting handle and attach one or more strips of emery cloth or the like at one side of the device in front of the band. 'When the device is pressed against the surface to be ground or polished, the band faced with the emery cloth adapts itself to the rounded surface, fitting tightly to it, whereby an extremely vigorous abrasive effect is produced, which present a more or less rigid abrasive surface. .In this manner, moreover, the entire surface of the emery cloth is utilized; while a further advantage is that one and the same device can be employed for commutators or collecting-rings of divers diameters, whereas ordinarily a number of grinding contrivances would have to be provided.
My invention is illustrated in the accon1- panying drawing, in which the figure is a section through one form of the new device. l
A is a bowed electrically non-conducting handle, which may for instance be made of vulcanite, liber, india-rubber covered steel, etc., and which owing to the curved shape possesses a certain degree of resilience. Between the ends of the handle A. there is stretched a iexible band, such as a piece of webbingl B. At the one end one or more strips (J of emery cloth or the like are attached, the other extremity of such strip or strips being free. lVhen a plu ality of strips is employed, they may be of different degrees of fineness.
In use, the device is grasped by the handle A and applied to the surface to be treated, against which the emery cloth thus lies. On the exertion of increased pressure upon the handle, the web B with the emery cloth 011 its face is caused to adapt itself exactly to the surface to be treated, which will thus be most effectively ground or polished by the entire surface of the emery cloth. The grinding is thus rendered exceedingly rapid and uniform. Mica insulation projecting from the face of the commutators can be most thoroughly removed by the new device.
It will be observed that there is no tensile strain on the emery cloth, but merely a compressive strain vertically to its surface; the
`strain on the web, moreover, when the contrivance is out of use is relatively small, and in use can be regulated as desired by the pressure of the hand. In this manner material is economized and safe and convenient handling of the device insured.
As all parts may be of electrically insulating material, the danger' of short-circuit ing can be entirely obviated, l
Having thus described my invention, I declare that what I claim is- A device for grinding or polishing commutators or collecting-rings, comprising a bent resilient electrically non -conducting handle, and a pliable band stretched between the ends thereof and faced with a `flexible strip presenting an abrasive surface, substantially as described.
In testimony whereof I affix my signature in presence of two witnesses.
IVILLIAM GERB.
fitnesses KATIIAnlNE MEYER, HUGH GnAMDTsKI.
US47029909A 1909-01-02 1909-01-02 Device for grinding commutators or collecting-rings. Expired - Lifetime US945270A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US47029909A US945270A (en) 1909-01-02 1909-01-02 Device for grinding commutators or collecting-rings.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US47029909A US945270A (en) 1909-01-02 1909-01-02 Device for grinding commutators or collecting-rings.

Publications (1)

Publication Number Publication Date
US945270A true US945270A (en) 1910-01-04

Family

ID=3013692

Family Applications (1)

Application Number Title Priority Date Filing Date
US47029909A Expired - Lifetime US945270A (en) 1909-01-02 1909-01-02 Device for grinding commutators or collecting-rings.

Country Status (1)

Country Link
US (1) US945270A (en)

Similar Documents

Publication Publication Date Title
US1573961A (en) Buff wheel and spacing device therefor
US2411724A (en) Method of making tubular abrasive bodies
US2720064A (en) Abrasive wheels
US2603921A (en) Rotary surface-finishing tool
US874251A (en) Implement for massage, shampooing, and other purposes.
US2259388A (en) Guard
US656428A (en) Twine-tension device.
US2572150A (en) Steel wool pad
US1023807A (en) Grinding and buffing wheel.
US2129279A (en) Scouring implement
US1029406A (en) Buffing-roll.
US1376395A (en) Jar-cover remover
US2516460A (en) Binding of books
US1797040A (en) Rubbing machine
US2527021A (en) Knife sharpener
US437463A (en) Polishing-strip chuck
US763814A (en) Mechanical appliance for cure of headache.
US2334173A (en) Rubbing shoe
US1025748A (en) Base-ball curver.
US2408953A (en) Reed sander
GB191115273A (en) Improvements in and relating to Grinding or Abrading Tools.
US1178099A (en) Knife-sharpener.
US1150728A (en) Spacer for gin-saws.
US1049605A (en) Attaching sharpening members to body members.
US1016615A (en) Sharpening implement.