Ladder Tipi)ed With Mule's Feet 



This ladder has feet 

 like a mule, and that 

 is why it can be safely 

 tilted in any position. 

 Four cupped pieces of 

 rubber, secured by 

 means of stout pins, 

 swing on the ends of 

 the ladder. They have 

 just enough play to fit 

 any inequalities of the 

 ground or surface 

 against which the lad- 

 der is placed 



NOT c\'ery ladder will stand with 

 perfect safety at almost any angle 

 on rough and unexen ground or 

 on a polished surface. The one shown in 

 the illustrations will, because of the tips 

 which are placed on cither end. 



The mule is among the most sure- 

 footed of animals. From his feet the 

 inventor has taken his cue and made a 

 ladder-tip like a mule's foot. The tip 

 is metal and rubber; the rubber grips 

 the surface on which the ladder rests. 



A 



A New Quick -Acting Wrench 

 QUICK-ACTIXC; wrench invented 

 by Fred G. Rockwood, Mendota, 



with the threads of the movable jaw and 

 tightens it with no loss of time. 



The center bar is screw- threaded on 



Wis., has a mo\a- 

 ble jaw which may 

 be released with (he 

 screw-threads ot 

 the jaw-actuating 

 shaft and ([uickK 

 slid into engage- 

 ment with the nut 

 to be loosened. 

 The actuating- 

 shaft then engagcb 



Upper pictures show movable jaw, loose, 



and being locked. Lower picture shows 



the wrench used on piping 



503 



two sides. To 

 move the slidable 

 jaw quickh', the 

 screw-threads ol 

 the center bar are 

 shifted so that they 

 do not engage the 

 slidable jaw. To 

 lock the jaw, the 

 operator gives the 

 collar a turn. 



