GB653174A - Improvements in or relating to photographic shutters - Google Patents

Abstract

653,174. Photographic shutters. KODAK, Ltd. (Eastman Kodak Co., and Fuerst, C. C.). Feb. 26, 1948, No. 5868. Addition to 650,874. [Class 98 (i)] A photographic shutter as described and claimed in the parent Specification and having independent separately-operable setting and releasing members is modified in that the spring-operated tripping member 53 and its setting member 52 comprise two relativelymovable parts and that one of these parts carries means for blocking movement of the manual release trigger 7 prior to tensioning of the blade ring driving spring 16 and is moved by a pin on the blade ring during movement of the latter to the set position to free the trigger. Preferably the means blocking the movement of the trigger is a lug 51 carried on a bell-crank 52 which is pivoted coaxially at 54 with the member 53 and has a lug 55 on one arm in a slot 56 in the member 53, so that clockwise movement of the bell-crank under its spring 58 sets the tripping member 53. On setting the shutter a pin 63 on the blade ring 15 engages the arm 65 of the bell-crank 52 to move it anticlockwise and so move the lug 51 clear of the path of the trigger 7, which may then be operated to effect an exposure whereafter the shutter parts assume the position shown.