An Improved Jumping Sheet, Safety Net or the like for use as a Fire-escape or Gymnastic Apparatus and also applicable as a Portable Tank.

摘要

8051. Petrzywalski, M. M. A. April 6. Gymnastic apparatus.-A safety net is suspended by means of springs or otherwise in a collapsible rectangular frame composed of uprights a, connected together by pivoted stays or expanding trelliswork. The apparatus is maintained rigidly in the extended position by means of stays c or the like, and is adapted to run on rollers W.