Patent GB-1323941-A (GB)
Title: Photographic apparatus
IPC: G03B9/70
Filed: 1970-08-14
Abstract: 1323941 Photographic apparatus EASTMAN KODAK CO 14 Aug 1970 [14 Aug 1969 (3)] 39284/70 Heading G2A Photographic flash apparatus comprises a holder 100 for receiving a percussion ignitable flash-lamp unit, the holder being indexable to position an unfired lamp in a firing position in which an actuating member 205 normally extends into an inserted unit for acutation to cause ignition of an unfired lamp in the firing position, and camming means 116 responsive to indexing movement of the holder for moving the actuating member 205 away from the lamp unit to permit indexing thereof. As described, the element is a striker 78 of a flash-cube (20) Fig. 1, (not shown) having integral strikers, but it may be the primer in a flash-cube without integral strikers. The invention is described in connection with a camera (10). Sequence of operation Positioning of a flashcube on the camera depresses a T-bar 121, thereby rotating a latching member 203 anti-clockwise (as seen) to release a pivotally mounted member 207 and the actuating member 205, which rises to bring an extension 263 thereof into contact with the striker 78 of the forward facing lamp of the flash-cube. If this bulb has already been fired, the extension 263 rises higher than shown, the actuating member 205 causes a signal flag 262 to be visible in the camera view-finder (18), and the striking surface 273 of a lever 213 lies out of the path of movement of a hammer 275. Assuming an operative flash-bulb depression of the shutter release frees a driver member 129 and causes the hammer 275 to strike the surface 273, the striking force being transmitted to the extension 263 to dislodge the striker 78, and also causing the signal flag 262 to be visible. As film is wound on by means of a member 42, Fig. 8, a spider member 48 is rotated clockwise, an arm 150 thereof setting the shutter driver member 129 and an arm 152 thereof engaging a reciprocable body member 138 thereby to index the flashcube holder by means of a spring 142 engaging abutment means 119. The arm 152 frees the body member 138 for return to its original position (dotted lines) as an exposure is made. In order to permit such flash-cube indexing, it is necessary to withdraw the extension 263 from the flash-cube. This is accomplished by the action of the camming means 116 on a pin 240 of the member 207, which is depressed thereby retracting the actuating member 205 until the next striker 78 is in position, when portion 118 of the means 116 allows the pin 240 and the member 205 to rise. Other cam configurations are shown, including ones having damping means to prevent accidental firing of a flash-lamp upon the indexing thereof to the firing position. The flash-cube (20''') Figs. 14-17 (not shown), is provided with a ramp (302) at the end of opening (69"), which ramp defines a step for the actuating member (205'''), thereby controlling the movement thereof towards the striker (78'''). Shutter Timing Mechanism Fig. 10 (not shown). This mechanism includes an L-shaped pivoted lever. One leg (250) thereof carries an abutment (252) which, when in the dotted line position corresponding to no flash-cube present, is engaged by the shutter blade 28 to provide one speed of operation. Inserting a flash-cube causes the lever 244 to be pivoted to the solid line position (Fig. 10, not shown) in which the abutment (252) is clear of the shutter blade, which is thus closed by spring action, giving a different exposure time.