US1512221A - Commutator for dynamo-electric machines - Google Patents

Commutator for dynamo-electric machines Download PDF

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Publication number
US1512221A
US1512221A US697120A US69712024A US1512221A US 1512221 A US1512221 A US 1512221A US 697120 A US697120 A US 697120A US 69712024 A US69712024 A US 69712024A US 1512221 A US1512221 A US 1512221A
Authority
US
United States
Prior art keywords
clamping
segments
commutator
shell
resilient
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
US697120A
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English (en)
Inventor
Frank A Haughton
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.)
General Electric Co
Original Assignee
General Electric 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 General Electric Co filed Critical General Electric Co
Priority to US697120A priority Critical patent/US1512221A/en
Application granted granted Critical
Publication of US1512221A publication Critical patent/US1512221A/en
Priority to FR594451D priority patent/FR594451A/fr
Priority to DEA44362D priority patent/DE503116C/de
Priority to GB6068/25A priority patent/GB230470A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/04—Commutators

Definitions

  • My invention relates to commutators for 1 dynamo electric machines.
  • the segments are held in place by clamping rings having angular projecting flanges which interlock with recesses of correspondingform in the ends of the commutator segments.
  • clamping rings are firmly drawn together toward the segments by bolts or other suitable means. The clamping pressure thus applied to the segments must be suflicient to hold them truly concentric with the axis of rotation and maintain them permanently in their correct relation to each other under operating conditions.
  • I provide a-novel, practical and effective means which will permit the commutator segments to expand and contract in response to temperature changes, maintain the commutating surface of the segments concentric with the axis of rotation and in a smooth condition.
  • I accomplish this by providing relatively movable clamping rings, at least one of which is movably mounted on the commutator shell and applying a clamping pressure to said clamping rings through an elastic means such as an annular resilient member, the clamping pressure being applied on the clamping ring at a point substantially in line with the reactive force caused by the expansion of the segment.
  • FIG. 1 is a sectional view of a commutator embodying my invention
  • Fig. 2 is a fragmentary view similar to Fig. lshowing a modification of my invention.
  • FIG. 1 show a commutator built in accordance with my invention having segments. 10 which are held in place by clamping rings 11.
  • the clamping rings 11 are provided with a V shaped projection 12 which interlock with similar shaped grooves 13 formed in the ends of the segments 10 and interposed between the V- shaped projection and the segments 10 is the usual insulation such .as is commonly
  • These clamping rings 11 are mounted upon a shell 19, which forms a support for the comfnu-' tator and maintains the parts-in concentric relation with the shaft on which the commutator is tobe mounted.
  • Bolts 15 which act through resilient annular member 16 adding the resilient annular member 16 to exert a clamping pressure upon the rings 11 and hold them in engagement with the commutator segments.
  • the resilient annular members 16 engage the clamping rings 11' I will be seen that the commutator segments 10 due to the clamping rings being mounted on the shell 19 will always remain concentrio with the axis of rotation. It will also be seen, due to the clamping pressure of the resilient members 16 being applied at a point, in line with the reactive force;
  • the approximate center line of the segments 10 is along the line B.
  • This shoulder 17 is made narrow and its mean center is locatedin the plane of the neutral axis of the section of the resilient member, so that when the resilient member 16 is dished due to the normal clamping pressure or to expansion, no appreciable distorting" effect will be caused thereby'on the clamping rings 11.
  • neutral axis I mean the axis about which other points of the section of the resilient member 16 rotate as it is dished.
  • this shoulder may be slightly curved in cross section so that when the resilient member 16 dishes the shoulder 17 will not tend to expand the clamping ring 11 in the slightest degree.
  • the point of contact on the resilient member 16, which engages the clamping ring 11 is rounded to permit a slight rolling movement of the resilient member 16 on the clamping ring 11 as dishing of the resilient member occurs and thereby prevents any interlock ing engagement between the annular member 16 and the clamping rings 11, and the nuts 18 on the bolts 15 are seated in concave spherical seats which maintain the nuts- 18 silient member 16 is distorted.”
  • the resilient annular member 16 is also provided with a projecting flange 20 such as is usually provided to shroud the nuts 18 on the outer end of the commutator and prevents them from coming in contact with or catching into anything as the commutator rotates.
  • this flange is of small cross section it contributes only a small amount of the resistance of the member 16 to dishing, but as its extreme fibers are remote from the neutral axis of the section, it isslit at intervals as shown at 21, to prevent it from becoming overstrained and taking a permanent set.
  • the commutator is provided with a shell 19. ⁇ This arrangement togetherwith the resilient annular member 16, as shown, provides a. commutator having a free circulation of air therethrough which is a desirable feature when the commutator is large or subject to heating.
  • Fig. 2 of the 1 clamping rings 22 are mounted on a shell 23 which is secured to a shaft 24.
  • the clamping rings 22 are movable axially alon shell 23 and are thus held concentric with the axis of rotation.
  • Clamping pressure is applied to the rings 22 by means of bolts 25, acting through a resilient annular member 26, which engages a rounded projection 27 on the clamping rings 22.
  • This type of contact between the clamping rings 22 and the resilient member 26 will permit a relative movement between the parts and thus avoids any possibility of the distortion of the annular member 26 being imparted to the clamping rings 22.
  • the resilient annular members 26 are movably mounted upon the shaft 24 and are thus maintained concentric with the clamping rings 22.
  • a commutator comprising a plurality of segments,- a commutator shell.
  • relatively movable clamping rings on said shell for securing said segments, resilient annular members in contact with said clamping rings on the center line of reactive force caused by the expansion of said segments, and bolts passing through said annular members for applying a clamping pressure thereto.
  • a commutator the combination of a commutator shell, commutator segments, clamping members interlocking with" said segments mounted on said shell and adapted to move axially along said shell in response to forces caused by the expansion of said segments, resilient annular members abutting said clamping members at a point in line with the center of forces set up by the expansion of said segments, and means extending through said shell and resilient annular members for applying a clamping pressure on said clamping members.
  • commutator in a commutator, the combination of commutator segments, relatively movable clamping members interlocking with said segments for retaining them in position resilient annular members abutting said clamping members near their outer circumferences, and bolts passing through said resilient annular members at a point between their inner circumferences and where they abut the clamping members adapted to transmit a clamping ressure through said clamping members an said resilient annular members to said segments for securing the segments in position.
  • a commutator in a commutator, the combination of a shell, commutator segments, relatively movable annular clamping members on said shell interlocking with said segments for retaining them in position on said shell, resilient annular members abutting said annular clamping members near their outer circumferences, and bolts passing through said shell, annular clamping members and resilient annular members for securing the parts together, said parts being arranged to permit a free circulation of air through said shell.
  • a commutator the combination of commutator segments, a shell, a clampin ring on said shell interlocking with said segments and adapted to move axially in response to forces caused by expansion of said segments, a resilient annular member abutting said clamping ring for applying a clamping pressure thereto, and a shoulder on said resilient annular member interlocking with said clamping ring to maintain said resilient annular member concentric with said commutator, said shoulder being slightly rounded to prevent distortion of said clamping ring.

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  • Motor Or Generator Current Collectors (AREA)
US697120A 1924-03-05 1924-03-05 Commutator for dynamo-electric machines Expired - Lifetime US1512221A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US697120A US1512221A (en) 1924-03-05 1924-03-05 Commutator for dynamo-electric machines
FR594451D FR594451A (fr) 1924-03-05 1925-02-28 Perfectionnements aux collecteurs des machines électriques
DEA44362D DE503116C (de) 1924-03-05 1925-03-04 Stromwender fuer elektrische Maschinen, dessen Stromwenderstege durch einen oder mehrere seitliche Pressringe unter Zwischenschaltung eines besonderen ringfoermigen, der Waermeausdehnung nachgebenden Zwischenstuecks zusammengehalten werden
GB6068/25A GB230470A (en) 1924-03-05 1925-03-05 Improvements in and relating to commutators for dynamo electric machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US697120A US1512221A (en) 1924-03-05 1924-03-05 Commutator for dynamo-electric machines

Publications (1)

Publication Number Publication Date
US1512221A true US1512221A (en) 1924-10-21

Family

ID=24799882

Family Applications (1)

Application Number Title Priority Date Filing Date
US697120A Expired - Lifetime US1512221A (en) 1924-03-05 1924-03-05 Commutator for dynamo-electric machines

Country Status (4)

Country Link
US (1) US1512221A (fr)
DE (1) DE503116C (fr)
FR (1) FR594451A (fr)
GB (1) GB230470A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2519264A (en) * 1948-08-31 1950-08-15 Westinghouse Electric Corp Commutator
FR2644943A1 (fr) * 1989-02-27 1990-09-28 Ganz Villamossagi Muevek Agencement de collecteur pour machines electriques, en particulier pour moteurs de traction electrique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2482794A1 (fr) * 1980-05-16 1981-11-20 Alsthom Cgee Collecteur pour machines electriques tournantes
CA1210432A (fr) * 1984-06-20 1986-08-26 Canadian General Electric Company Limited Amortisseur de vibrations pour plot de commutateur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2519264A (en) * 1948-08-31 1950-08-15 Westinghouse Electric Corp Commutator
FR2644943A1 (fr) * 1989-02-27 1990-09-28 Ganz Villamossagi Muevek Agencement de collecteur pour machines electriques, en particulier pour moteurs de traction electrique

Also Published As

Publication number Publication date
DE503116C (de) 1930-07-21
GB230470A (en) 1925-07-23
FR594451A (fr) 1925-09-14

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