Drive-in apparatus particularly an electric tacker for driving i

Details Drive-in apparatus particularly an electric tacker for driving i Drive-in apparatus particularly an electric tacker for driving i

1984-12-21

1986-01-21

Bell, Paul A.

Elongated-member-driving apparatus

With means to move or guide member into driving position

Including supply magazine for constantly urged members

173117, 173139, B25C 515

Patent

active

045653135

ABSTRACT:
In a drive-in apparatus for driving fasteners such as clips, nails, tacks, staples and the like in a workpiece, a solenoid for actuating impact blade which ejects the fastener is movably arranged in the apparatus housing. The solenoid includes an exciter coil formed with a central opening in which a cylindrical armature connected to the impact blade is magnetically accelerated in forward direction and returns to the starting position by a resetting spring. The exciter coil is also movably guided within the housing and spring biased in the forward direction by another biasing spring having a progressive elasticity characteristic. Depending on the steepness of the characteristic line of the second biasing spring, the backstrokes of the apparatus and the force necessary for tacking operation can be adjusted in broad range.

REFERENCES:
patent: 3438449 (1969-04-01), Smith
patent: 4515303 (1985-05-01), Schadlich et al.

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