z tic v I 



Fig. 12. The internal mechanism frame is in two parts linked and hinged together by the plates/and/' and 

 pivoting about the rollers m and n (see Fig. 15). This figure, and Fig. 13 opposite, represent elevations of the 

 two interlocking faces of the two parts drawn to the same scale; above is shown the forward section looking 

 towards the front. For letter references see text. 



on pins and provided with an adjustment for tensioning. A plate pd is secured to the driving gear 

 wheel pa to cover the mechanism and is provided with two pins pd' which assist in locating the shoes. 

 The large gear wheel p, the driven member, engages with the gear wheel qp on the formalin tank, so 

 rotating the storage spool within the tank. The whole assembly, pa-pd, is carried on a short shaft pe, 

 secured to the side frame of the mechanism, about which it rotates freely. A washer pf, secured 

 to the shaft pc by a set screw, retains the friction assembly on the shaft. 



q. Formalin tank, cast phosphor bronze and dull nickle plated, containing storage spool r. 



qa. Reserve tank for formaldehyde, cast in one with q and communicating with it by six fine 

 perforations qb. 



qb. Position of perforations connecting qa with q. 



qc. Curved metal lid, 007 in. thick, lined with rubber and hinged to q. 



qd, qe. Rubber lining qd held to lid of formalin tank by two strips of plated brass qe. 



qf. Lip to entrance of formalin tank through which the gauze bandings pass to the storage spool. 

 Note that the lip is just lower, 0-05 in., than the edges qg, which are continuations of the sides of the 

 tank. Thus a narrow slit is left for the passage of the bandings between the lip and the soft rubber lining 

 which extends beyond the lid and rests lightly on the bandings, so minimizing the escape of formalin. 



qh. Comb teeth, 0-175 in. wide and 0-065 in - thick, on lip of formalin tank; these fit into grooves 

 in the rear driving roller n and lift the bandings clear of the roller (see reference on p. 467 to diffi- 

 culties with the Type I machine). 



qi, qi'. Lugs for lifting the formalin tank out of the mechanism frame. 



qj, qk. Locating pins qj, sliding in slots qk in the mechanism frame. 



