DETAILED DESCRIPTION 



481 



metal end-sections, 1 in. long and i& in. overall diameter. Between these and the rubber ends of 

 roller m the edges of the gauze bandings are tightly gripped (when the two parts of the frame are 

 screwed together by the wing nuts eb, eb' and driven forward when the rollers are rotated. 



na Gear wheel, 1 1 in. diameter fixed to spindle of driving roller n, driven as described under ma, 

 and engaging with the gear wheel pa of the friction drive system for the storage spool (see Fig. 9). 



pb' )d P 



INCHES 



I. ■ . I. ■■ I 



J_ 



i 



1 



Fig. 9. Details of the large gear-wheel containing the friction drive system for driving the storage spool: 

 elevation, with the covering plate removed, and section. For letter references see text. 



o. Metal roller T 7 g in. diameter round which plain gauze banding turns before passing through 

 slit to join the graduated gauze. 



oa, oa'. Bearings, on either side, for roller o. 



p. Large gear wheel containing the friction drive system for driving the storage spool (see Fig. 9). 



pa-pf. The small gear wheel pa is driven through the gear train (see under na) and forms the 

 driving member of the clutch; it is slotted at its outer end to engage with the driving projections of 

 two shoes pb, pb' which drive the large gear wheel p by their friction on its inner surface. These 

 shoes are kept in contact with the inner surface of the gear wheel p by two coil springs pc , pc' located 



