| 摘要 |
<p>PURPOSE:To make a device small in size by actuating an operating lever through a slit formed in parallel with the axis of a guide cylinder. CONSTITUTION:A slit 17 formed in parallel with the axis of a guide cylinder 60 is extended halfway up to the sliding range of a piston 9 from the left end of the cylinder 60. An operating lever can be actuated through the slit 17 together with a connecting lever 5. The slit 17 shall be extended to a position which allows the piston 9 to come up to the slit 17 where the negative pressure of a gas chamber 8 is released when an arc in an open gap is distinguished. By this constitution, energy consumption after the extinction of an arc can be made extremely small, and a drive device can thereby be made small in size.</p> |
