Electronic device with improved element retention

Details Electronic device with improved element retention Electronic device with improved element retention

1985-05-13

1987-03-03

Goldberg, E. A.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338149, 338184, H01C 1048

Patent

active

046478981

ABSTRACT:
A retention mechanism for retaining an electrical element securely within a housing is specifically adapted for use with a loop-shaped (e.g., substantially annular) electrical element, having two ends separated by a small gap. The mechanism comprises a gap-registrable member in the housing cavity containing the electrical element, whereby the gap-registrable member registers with, and fits into the gap of the electrical element when the latter is seated on a seating surface in the cavity. The gap-registrable member is dimensioned to spread the gap, thereby radially expanding the electrical element to bring it into a locking frictional engagement against the walls of the cavity. The gap-registrable element advantageously serves also as a stop for a rotational contact, or wiper, included with the electronic device. The side wall of the cavity is advantageously provided with a radially-inwardly extending lip that is engageable with the electrical element to restrain it from lifting off of the seating surface.

REFERENCES:
patent: 2476294 (1949-07-01), Hampton
patent: 2480995 (1949-09-01), Armitage
patent: 3593252 (1971-07-01), Shiro et al.
patent: 3629777 (1971-12-01), DeLong et al.
patent: 3750079 (1973-07-01), Scheiterbauer et al.
patent: 3760324 (1973-09-01), Baldwin et al.

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