Cutting by use of rotating axially moving tool – With control means energized in response to activator... – To control infeed
Patent
1981-07-02
1984-02-14
Bray, W. D.
Cutting by use of rotating axially moving tool
With control means energized in response to activator...
To control infeed
408 6, 408 10, 408 14, B23B 4718
Patent
active
044313500
ABSTRACT:
An apparatus for penetrating a casing wall, particularly the casing wall of a detonating or firing mechanism, when disarming an undetonated explosive object, such as a live bomb, includes a drill unit driven by an electric motor and carrier means for carrying the drill unit in substantially any selected position relative to said explosive object. A feed means is arranged for moving in a controllable fashion at least a part of the drill unit holding the drill in the axial direction of said drill, and means are provided for detecting a decrease in the drill torque responsive to penetration of the drill through said wall.
REFERENCES:
patent: 2910895 (1959-11-01), Winslow
patent: 2997900 (1961-08-01), Pugsley
patent: 4310269 (1982-01-01), Neu et al.
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