Device for limiting the withdrawal of the electrode of a die sin

Details Device for limiting the withdrawal of the electrode of a die sin Device for limiting the withdrawal of the electrode of a die sin

1989-11-07

1991-06-11

Evans, Geoffrey S.

Electric heating

Metal heating

Cutting or disintegrating

200 6142, 219 6916, B23H 714, B23H 732

Patent

active

050234218

ABSTRACT:
A device comprising an element mounted on the frame 1 and having a microswitch 8 that can be actuated by a mechanical part 9 and which causes the machining current to be cut off when this part 9 arrives opposite it when the machining head 5 moves up.
The mechanical part 9 is movable along the guide rod 10 mounted on the machining head 5 and can be fixed at a given height at the start of machining. This height is such that the distance h between the part 9 and the microswitch 8 is less than the distance H between the surface of the workpiece 4 and the level of the machining liquid.
The part 9 moves as one with the machining head 5.

REFERENCES:
patent: 3125700 (1964-03-01), Bentley et al.
patent: 3138691 (1964-06-01), Livshits et al.
patent: 3609279 (1971-09-01), Giesbrecht
patent: 3694599 (1972-09-01), Davis
patent: 3777104 (1973-12-01), Bell, Jr.
patent: 3866004 (1975-02-01), Nawrocki
patent: 4387284 (1983-06-01), Nicholas et al.
patent: 4510365 (1985-04-01), MacGregor et al.
patent: 4578555 (1986-03-01), Inoue

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