| 摘要 |
<p>A flexible variable resistor (2, 50, 60, 140) comprising an outer flexible element (6), an inner flexible element (4), means (18, 20, 22) for mounting the inner flexible element in tension within the outer flexible element, the arrangement being such that, when said elements are deflected, points of contact (34, 36) therebetween will vary as deflection varies characterised in that at least one of the outer and inner flexible element includes resistive material whereby the electrical resistance between said elements varies with deflection thereof.</p> |
