Contact device for the transmission of electric current between a stationary contact part and a movable contact part
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United States of America Patent
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-
Jan 15, 1980
Grant Date -
N/A
app pub date -
Jan 19, 1978
filing date -
Jan 21, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a contact device for the transmission of electric current between a stationary contact and a movable contact wherein the stationary contact has walls at least partially encircling the movable contact, resilient elements transmit the current and are positioned between the movable contact and the walls of the stationary contact. The resilient elements comprise roller contact springs made of a material having sufficient electrical conductivity, elasticity and mechanical strength and are wedged in between the movable contact such that upon movement thereof the contact springs revolve about their center. The springs have a diameter larger than is necessary to span the distance between the movable contact and the walls of the stationary contact, and the roller contact springs are reduced in diameter by twisting or torsioning.
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