DETAILED DESCRIPTION 479 



a, a'. Right- and left-hand side walls of the front section of the mechanism frame: o-ocj-in. 

 sheet brass, dull nickel plated. 



b, b'. Right- and left-hand side walls of the rear section of the mechanism frame. Same material 

 as a, a . 



c, Cross-bar holding together a and a', and passing above and cast in one with the water tunnel. 



d, Forward entrance to the water tunnel through the internal mechanism frame; its edges slide 

 into the machined edges of the water tunnel of the casting A (Fig. 3). The tunnel walls are of cast 

 phosphor bronze. 



e, e'. Clamping rods, one on each side, serving, when tightened up, to hold the two sections of 

 the frame together. They are hinged to the side walls of the front section at ea and provided at 

 the other end with wing nuts eb, eb' to engage with the slotted lugs ec, ec' on the rear section. 



ea. Hinge pins for clamping rods e, e' ; these also secure the side plates a, a', to the cross-bar s. 



eb, ec. See under note e, e' . 



f , f. Plates, one on either side, fixed to the rear part of the frame about the bearing for the 

 spindle of the roller n and having slotted ends to accommodate the bearing carrying the spindle for 

 the roller m. These plates act as a hinge about which the two parts of the frame may be swung open 

 when the ends of the rods e, e' have been released. The slots allow the two parts of the frame, and so 

 the rollers m and 11, to be pulled ^ in. apart to allow the gauze bandings to be threaded through 

 the driving rollers. 



g, Spool from which plain gauze banding winds. 



ga. Metal strip for securing end of gauze banding to spool g. 



gb. Spindle on which the spool g rotates ; it is provided with a milled head by which it may be 

 drawn out on the right-hand side when the spring clip i is rotated, thus allowing the removal of the spool. 



gc. Slit through which the plain gauze passes to join the graduated gauze above the water tunnel. 



gd. gd'. Path of the plain gauze. 



h. Spool from which graduated gauze banding winds. 



ha, hb. Similar to ga and gb but referring to spool //. 



he. Slit through which the graduated gauze passes up to cross the water tunnel. 



hd, hd'. Path of the graduated gauze. 



i. Spring clip which holds spindles gb and hb in position ; this may be rotated about the pin j to 

 release spindles (see under gb). 



j. Pin about which i rotates. 



k, k'. Spring tongues bearing on the end-plates of the spools g and h to act as brakes. They may 

 be bent by hand to adjust pressure. 



1. Metal roller ^ in. diameter round which the graduated gauze banding turns before passing 

 through the slit to cross the water tunnel. 



la, la'. Bearings, on either side, for roller /. 



m. Forward driving roller of rubber (vulcanized to brass spindle) with central section 4 in. long 

 by 1 in. diameter and end-sections each 1 in. long by ij in. diameter between which and the metal- 

 toothed ends of the driving roller n the gauze bandings pass. 



ma. Gear wheel if in. diameter rotating freely on the spindle of roller m and transmitting drive 

 from the worm VE to the gear wheel na secured to the spindle of the rear driving roller n. This 

 gear wheel ma is kept in place on its spindle by a small pin passing through the square section mb 

 of the end of the spindle. (Originally this gear wheel was secured to its spindle by a taper pin; 

 this pin was discarded as it was found that the gauzes in practice fed better if the forward roller was 

 left to rotate freely.) 



mb. Square end of spindle of roller m for the attachment of a winding handle to rotate the rollers 

 in loading and adjusting bandings for use. 



n. Rear driving roller of plated brass with central section, 4 in. long by \\ in. diameter, recessed 

 to accommodate ten comb teeth gh (diameter of recessed portions being 1 in.) and with toothed 



