Enögd spegelreflexkamera med undanfällbar spegel

摘要

1,246,671. Reflex cameras. FRANKE & HEIDECKE G.m.b.H. [trading as ROLLEI-WERKE FRANKE & HEIDECKE]. Oct. 14, 1968 [Oct. 14, 1967], No. 40203/68. Heading G2A. A single-lens reflex camera comprises a between-the-lens pivoted blade shutter and a focal plane roller blind shutter. The blade shutter is open when cocked and when uncocked. When the blade shutter is required it is cocked and upon camera release, the following sequence takes place: the mirror pivots up, the blade shutter closes, the diaphragm shuts down to a pre-set value, the focal plane shutter opens, the blade shutter opens and closes to effect an exposure, the focal plane shutter closes, the mirror pivots down, the blade shutter opens, and the diaphragm moves to its fully open position. As shown in Fig. 3 the blade shutter comprises blades 28A mounted between a first ring 28 and a second ring (not shown). The shutter has been tensioned by moving a lever 36 which moves a lug 39 attached to the second ring, movement of lever 36 also tensioning springs 32, 34 and engaging a pin 42 with a ledge 41 of a lever 33. Upon shutter release the mirror (not shown) pivots up and moves a step 1 Fig. 1 in direction B allowing a spring 10 to rotate an assembly 3, 5, 14, 19 anti-clockwise. This movement releases from member 19 a pawl 20 joined to a ring 26. Spring 34 rotates ring 26 clockwise through the connection 41, 42. Ring 26 is joined to shutter ring 28 at 29 and thus ring 28 rotates to close blades 28A. Movement of assembly 3, 5, 14, 19 also moves a diaphragm blade ring 11 to close blades 11B until pin 18 engages a pre-set cam 17. Movement of step 1 also initiates a mechanism (not shown) to open and close the focal plane shutter at the correct times. Spring 34 continues to move ring 26 until notch 24 in pawl 22 engages member 19 and as lever 26 moves a lug 31 thereon strikes a catch 30 which releases the second shutter ring (not shown) for rotation to open and close blades 28A to effect an exposure. During movement of this second ring, lug 38 thereon strikes lever 44 disengaging the connection 41, 42. Spring 32 now seeks to rotate ring 26 anti-clockwise. This is possible when the mirror pivots down again, as step 1 is moved in direction B and assembly 3, 5, 14, 19 is moved clockwise. This moves the diaphragm to its fully open position and releases pawl 22 from member 19 to allow rotation of rings 26 and 28 to close the blades 28A.