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HANDBOOK OF PHOTOGRAPHY 



Fig. 12. — Photograph 

 showing the construction 

 of the popular Compound 

 shutter, made by Freder- 

 ich Deckel, Munich. 1, 

 finger release; 2, air pump 

 for bulb release; 3, pump 

 retarding device; 4, setting 

 lever for motor spring; 5, 

 exposure indicator (time, 

 bulb, instantaneous) ; 6, 

 speed-setting dial; 7, dia- 

 phragm adjusting and indi- 

 cating lever; 8, adjusting 

 cam under speed-setting 

 dial; 9, pin to connect cam 

 8 with dial 6. 



'^2 5 



L' c d 



Fig. 13. — Retarding device of the 

 Compound shutter (Julius Springer). 

 a, air cylinder; b, speed-setting dial; 

 c, speed-setting cam, pivoted at d; d, 

 pivot for speed-setting cam; e, piston 

 inside cylinder; /, retard-lever link; 

 g, pivot for retard-lever link; h, 

 retard lever; i, pin connecting dial 

 and cam and regulating position of 

 the link /. 



Fig. 14A. — Mechanism of mod- 

 ern Compur shutter, #0 (Julius 

 Springer), a, backing case; c, set- 

 ting lever, linked with leaves ci and 

 ct and mainspring a; e, release lever, 

 linked with levers d, f, and g\ h, 

 trigger for the sector ring, moved by 

 e; i, ki to fcs, retarding device; 

 e, ei, mechanism of self-timer; m, pro- 

 jections of sector ring; wi, knob for 

 operating self-timer; o, cable-release 

 bushing; p, stop for release lever e. 



