A new or improved method of and means for removing pit props

摘要

211,054. Allcock, J. May 25, 1923. Addition to 187,184. Lever load-handling appliances.-Rods 4, 6 are cranked and pointed at one end to penetrate a pit prop and at the other are connected to shackles attached to the bar 1. The bar 1 may have a hooked end to engage the web of a girderprop. A spike may be formed on the bar between the hook 8 and the adjacent end.