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US 4,042,799 AGranted
Damping of contacts
AssigneeElmeg Elektro-Mechanik GmbH
InventorHans Werner Reuting
Life of this patent
Estimating the term…
Abstract
Contact springs are damped against resilient bouncing in that thin plastic foil covers one or both sides of the spring. The foil, when extending into the zone of clamping one end of the spring, is used to maintain specific tolerances in contact positioning. The foil should have low cold flow characteristics and high reversible elasticity, such as folacron or polysulphonic plastic.
Claims8
Contact arrangement in switching devices having at least one movable contact and a stationary contact mounted on a contact spring;
- means for clamping one end of the contact spring, the contact spring having at least one of its flat surfaces at least partially covered individually by a plastic foil, being bonded thereto and extending into a zone of clamping as between said means and the one spring end for offsetting positioning tolerances, said foil having low cold flow characteristics and high reversible elasticity such as exhibited by a polysulfonic plastic.
A contact arrangement comprising:
- a clamping member including a first and a second insulating member and a spacer member being fastened together;
- a first and a second contact spring mounted respectively between the first and second insulating members on the one hand, and the spacer member on the other hand;
- and
- each of said contact springs having at least one of its flat surfaces covered with a foil made of a material having low cold flow characteristics and high reversible elasticity such as exhibited by a polysulfonic plastic and being bonded to the respective contact spring and extending over at least the predominant part of the length of the contact springs, at least one of the foils extending into a zone of clamping as between the respective insulating member and the spacer for offsetting tolerances of spacing by the spacer member.
1 more element
Dependencies are inferred from the claim text.