Foil-type switching element, in particular for use in collision detection systems
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United States of America Patent
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Sep 13, 2011
Grant Date -
Nov 25, 2010
app pub date -
Jun 29, 2006
filing date -
Jun 29, 2005
priority date (Note) -
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Abstract
A foil-type switching element comprises a first carrier foil and a second carrier foil arranged at a certain distance from each other by means of a spacer, which comprises one opening (18) defining an active area. An elongate resistive layer (20) is provided on the second carrier foil within the active area while elongate 5 shunt means (22) are arranged on the first miler foil within the active area and facing the resistive layer (20). The form of the opening (18) in the spacer is such that the active area generally tapers in the longitudinal direction of the elongate resistive layer (20), so that when pressure is applied on the switching element, the shunt means (22) shunt a portion of the resistive layer (20) that 10 progressively increases with pressure, from the broad end of the spacer opening (18) towards its narrow end.
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