| 摘要 |
<p>A membrane switch assembly (10) is comprised of spaced apart layers (12, 16) having corresponding patterns of conductive switch contacts (28, 28 min ) arranged in series thereon, the layers (12, 16) being separated by spacing means (20) having openings therein. The switch contacts (28, 28 min ) on each layer are spaced along a single conductive path (24, 24 min ) so that a regular unit value of impedance means exists between the switch contacts (28, 28 min ). When the electrical circuit is completed by closing a switch site, the resulting total impedance is essentially equal to the sum of the unit values of the impedance means along the circuit path formed by the closed switch.</p> |
