Device to measure axial displacement in a borehole

Lawrence Corlies Murdoch
Todd Alan Schweisinger
Cecil O. Huey

Document Type Patent


A device to measure minute displacement in rocks, including anchor deployment means, anchor registration means, and frame release means. Further including anchor units comprising a fixed anchor point, a reversible anchor actuator and a deployable anchor face capable of being deployed with a force of up to 2000 lbs.