118 



HANDBOOK OF MECHANICAL DESIGN 



^^^^^ 



m. 



Exf ended finger grip 



Flush iop 



^K lU 



^ 



Fig. 236. — Stove-plate-type cover 

 held by gravity. 



Finger liff ' 



Weic/h-f ofex.- 

 iending lug A 

 running full 

 wic/fh of cover 

 keeps if in place 



Fig. 237. — A simple cover 

 held by gravity and requiring 

 no machine work. 



Fig. 2 38.— Pivoted oil- 

 hole cover. 



3 [lis; 



Fig. 239. — Vertical cover 

 swung on a screw. 



Weigh f of knob 

 keeps hook in place 



Fig. 240. 



L 



Fig. 241. — Plain gravity latch. 



Bevel- - 



16 ^°8 ^■ 



Co ver is slipped 

 over stud and 

 drops on body 

 of The sfuds, 

 being held by 

 gravify 



0.005" 

 clearance 



Fig. 242. — Positive type of gravity lock. 



