| 摘要 |
<p>The keyboard type push-button switches are part of a mounting block. The upper face of the block has keyboard type push-buttons and the lower face has electric circuit terminals. The block contains electric and mechanical switching devices actuated by the push-buttons and opening or closing circuits connected to the terminals. The narrow sides of the block have mounting brackets and each of these brackets has a locating pin and a securing screw. On the underside of the block, there is a strap onto which is mounted a connector. The switches and mounting block allow replacement of faulty switches in less than one minute when mounted on a control panel.</p> |
