Leader cable anchor for a geophone

摘要

In accordance with illustrative embodiments of the present invention as disclosed herein, a leader cable is anchored to a post on the upper end of a geophone case having a spike on its lower end that penetrates the ground to hold the case in an upright postion. The anchor is formed by a continuous stress member in the cable that is looped around the post to isolate the electrical conductors in the cable from strains imposed on the cable. The post can be an integral part of a block located at the upper end of the case, or a bobbin that is captured by a cap that closes the top of the case.