| 摘要 |
<p>PCT No. PCT/SE88/00242 Sec. 371 Date Oct. 25, 1989 Sec. 102(e) Date Oct. 25, 1989 PCT Filed May 11, 1988 PCT Pub. No. WO88/08779 PCT Pub. Date Nov. 17, 1988.An electric tool for driving in fixing elements (10) into an object (4) by means of a magnetic field generated by supplying magnetizing current to an electromagnetic device, comprises a circuit means (17) which is adapted, when activated, to supply magnetizing current to said electromagnetic device. The tool comprises two actuators (18, 19) alternatively connectible to the circuit means (17) and adapted, when actuated, to activate the circuit means, one (18) of the actuators being an actuator which is activatable in a potential-free mode and which is, in an initial position, unconnected to the circuit means, and the other (19) of the actuators being connected to the circuit means in the initial position. An activating means (25) is connectible to an actuator (18') which is activatable in a potential-free mode and included in a subsequent, similar tool, said activating means being adapted to be actuated by the circuit means (17) to produce, with a time delay after the actuation of said circuit means, a potential-free signal for actuation of said actuator (18') which is activatable in a potential-free mode and included in the subsequent tool. The actuator (18) which is activatable in a potential-free mode, is activatable by an activating means connected thereto, such as the activating means (25'') of a preceding similar tool, so as to activate the circuit means (17) after being connected thereto.</p> |
