Commutators
AssigneeThe Morgan Crucible Company plc
InventorsDavid L. Cooper, Robert C. Dunigan, Joseph M. Grenier, Eric G. Lee
Life of this patent
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Abstract
An improved commutator anchoring system and methods of manufacturing such a system are disclosed. The system includes a wound fiberglass or other ring embedded in the internal core of the commutator to reinforce the resulting structure and enhance its thermal and mechanical stability. The reinforcing ring also functions as a form about which various anchors can be patterned, increasing their uniformity over free-form designs.
Claims10
A rotary switch comprising:
- a. an electrically non-conductive core;
- b. electrically non-conductive means, embedded in the core, for reinforcing the switch;
- and
- c. a plurality of electrically conductive segments spaced about the core, each segment having an anchoring system embedded in the core and formed about the reinforcing means to fasten the segment thereto.
A shell commutator comprising:
- a. a core;
- b. a reinforcing ring;
- and
- c. a strip of metal curled to form a cylinder having exterior and interior surfaces and slotted to form discrete segments, the interior surface of the strip contacting the core and comprising:
- i. a ledge upon which the reinforcing ring rests;
- and
- ii. a hook formed about the reinforcing ring.
A shell commutator comprising:
- a. a phenolic core having inner and outer diameters;
- b. a ring of wound fiberglass strands embedded in the phenolic core and having an outer diameter approximately equal to the outer diameter of the phenolic core;
- and
- c. a plurality of metal segments spaced about and contacting the outer diameter of the phenolic core, each segment comprising:
- i. a tang;
- and
- ii. an anchoring system comprising:
- A. an upper crown surrounded by the phenolic core;
- B. an upper anchor formed into a hook about the ring and partially surrounded by the phenolic core;
- C. a ledge for supporting the ring and partially surrounded by the phenolic core;
- D. a lower anchor formed into a hook and surrounded by the phenolic core;
- and
- E. a lower crown surrounded by the phenolic core.
A shell commutator comprising:
- a. a core of phenolic material;
- b. a reinforcing ring comprising wound fiberglass strands and epoxy resin;
- and
- c. a strip of metal curled to form a cylinder having exterior and interior surfaces and slotted to form discrete segments, the interior surface of the strip contacting the core and comprising:
- i. a ledge upon which the reinforcing ring rests;
- ii. a first hook formed about the reinforcing ring;
- iii. a second hook embedded in the core;
- and
- iv. first and second crowns embedded in the core.
A rotary switch comprising:
- a. an electrically non-conductive core;
- b. electrically non-conductive means, embedded in the core, for reinforcing the switch;
- and
- c. a plurality of electrically conductive segments spaced about the core, each segment having an anchoring system:
- i. embedded in the core;
- ii. formed about the reinforcing means;
- and
- iii. comprising a ledge on which the reinforcing means rests.
Dependencies are inferred from the claim text.