Metal working – Method of mechanical manufacture – Electrical device making
Patent
1984-10-26
1986-07-08
Goldberg, Howard N.
Metal working
Method of mechanical manufacture
Electrical device making
310 42, 310 43, 310 46, H01R 4306
Patent
active
045984638
ABSTRACT:
A commutator of the arch-thrust type and process for its production, wherein at least one annular slot is provided in its segment set which is located concentrically to the longitudinal axis of the commutator and into which an armoring ring is placed which is under tension. In order to be able to produce the commutator in a cost-effective manner in spite of a high dynamic and thermal load capability, the segments are provided with punches forming the annular slots. The boundary surface of the annular slot which serves as a support of the armoring ring defines a polygon and is maintaining the insulation using molded plastic or air between the segments which are separated by insulation material radial outwardly of the annular slot. In the production, the segment set is temporarily reduced in its diameter at least to the extent that, subsequently, the armoring ring can be made to slide into the annular slot formed by a punch in the segments, closed partly towards the central longitudinal axis and forming a seat for the armoring ring.
REFERENCES:
patent: 2477455 (1949-07-01), Hinchliff
patent: 2674784 (1954-04-01), Roberts et al.
patent: 3450914 (1969-06-01), Demerciere
patent: 3899705 (1975-08-01), Heil
patent: 4056882 (1977-11-01), Letts
Gerlach Karl-Heinz
Worner Lothar
Goldberg Howard N.
Kautt & Bux KG
Selman Leonard S.
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