Measuring and testing – Dynamometers – Responsive to force
Reexamination Certificate
2006-07-04
2006-07-04
Williams, Hezron (Department: 2856)
Measuring and testing
Dynamometers
Responsive to force
C073S753000, C073S754000, C073S862636, C073S862641, C073S862680, C367S157000, C367S159000, C367S160000, C367S161000
Reexamination Certificate
active
07069795
ABSTRACT:
Various sensors use an electro-active device (11) electrically connected to a detector circuit. The electro-active device (11) comprises an electro-active structure in the form of a continuous electro-active member (12) curving in a helix around a minor axis (13) which is in itself curved for example in a helix around a major axis (14). On activation by relative displacement of the ends (16) of the device (11), the electro-active structure twists around the minor axis due to the fact that the minor axis (13) is curved. The continuous member (12) has a bender construction of a plurality of layers (21) and (22) including at least one layer of electro-active material so that concomitantly with the twisting the continuous member (12) bends generating an electrical signal detected by the detector circuit. The electro-active device (11) is advantageous as a sensing element in a sensor because it has a large displacement, high sensitivity and low compliance.
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Hooley Anthony
Lenel Ursula Ruth
McKevitt Gareth
Pearce David Henry
Shepherd Mark Richard
1...Limited
Elman Gerry J.
Elman Technology Law P.C.
Rogers David A.
Williams Hezron
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