Anti two-blocking device

Claim 1

A fail-safe cutter device for securing onto a cable and preventing loss of a payload due to "two-blocking" which comprises: a cylindrical elongated member having a conical upper end section; a first slot along the length of said cylindrical member along a diameter thereof with equal dimensions on each side of the diameter; said slot extending from the outer surface through the axis of said member to a depth greater than the radius of said cylindrical member thereby forming first and second substantially semi-cylindrical sections; said first semi-cylindrical section having a length which is less than that of said second section; a second linear slot having the same width as said first slot extending from the opposite outer surface of said cylindrical member toward the axis thereof joining said first slot in alignment therewith; a cutter secured within said second slot and adapted for rotational movement relative to the axis of said cylindrical member; an anvil of substantially the same length as said second section secured at one end to said second semi-cylindrical section below the lower end of said first section for rotational movement into said first slot; a clamping arm secured relative to said second semi-cylindrical section parallel with said anvil for movement relative to said second section; an eccentric pin; said eccentric pin securing said anvil to said second section with said clamping arm fixedly secured to said eccentric for rotation therewith; means for securing said anvil within said first slot relative to said cutter; whereby a cable along the axis of said cutter device will be clamped between said cutter and said anvil.