A Method for Removing Pit-props or Supports in Mines and Apparatus therefor.

摘要

1188. Sommer, F. Jan. 25. Lever load-handling appliances.-Relates to the removal of mine props. A lever b, Fig. 1, and strap c are provided to be bolted together upon the prop a so that it can be loosened by turning with or without the aid of tackle g. A lever l, Fig. 3, attached to a chain is provided for the same purpose as the lever b, the chain being wrapped round the prop a from an external attachment.