Exposure control apparatus

Claim 2

Exposure control apparatus for a photographic camera having an exposure aperture, said apparatus comprising: a. resilient sheet material forming at least one shutter blade, having a spirally configures configured relaxed condition and extendable therefrom into an energy storing flexed condition, said sheet material being located for exposure influencing movement relative to said aperture during movement from said flexed condition into said relaxed condition; and b. means for moving said sheet material from said relaxed condition to said flexed condition and then releasing said sheet material for exposure influencing movement back to said relaxed condition.

Claim 3

Exposure control apparatus for a photographic camera having an exposure aperture, said apparatus comprising: a. spring means forming at least one shutter blade movable relative to said exposure aperture between flexed and relaxed conditions for influencing photographic exposure during movement from said flexed condition to said relaxed condition; b. support means including first and second means positioned on opposite sides of said aperture, said first means supporting one portion of said spring means and said second means supporting another portion of saiD spring means so that said spring means is located for aperture blocking and unblocking movement across said aperture; c. cocking means for flexing said spring means; and d. actuating and retaining means for releasably retaining said spring means in said flexed condition and actuatable for releasing said spring means to permit exposure influencing movement from said flexed condition to said relaxed condition.

Claim 4

Exposure control apparatus for a photographic camera having an exposure aperture, said apparatus comprising: a. spring means forming at least one shutter blade movable relative to said exposure aperture between flexed and relaxed conditions for influencing photographic exposure during movement from said flexed condition to said relaxed condition; b. support means including first and second means positioned on opposite sides of said aperture, said first means supporting one portion of said spring means and said second means supporting another portion of saiD spring means so that said spring means is located for aperture blocking and unblocking movement across said aperture; c. cocking means for flexing said spring means; and d. actuating and retaining means for releasably retaining said spring means in said flexed condition and actuatable for releasing said spring means to permit exposure influencing movement from said flexed condition to said relaxed condition.

Claim 5

Exposure control apparatus according to claim 2 wherein said spring means comprises resilient sheet material tightly wound about said first means when said spring means is relaxed and capable of being drawn from said relaxed condition to a flexed condition wherein it is wound upon said second means.

Claim 6

Exposure control apparatus for a photographic camera comprising: a. means forming an exposure aperture; b. a first shutter blade formed by first spring means movable between flexed and relaxed conditions, said first spring means unblocking said exposure aperture in said relaxed condition and blocking said exposure aperture in said flexed condition; c. a second shutter blade formed by second spring means movable between flexed and relaxed conditions, said second spring means blocking said exposure aperture in said relaxed condition and unblocking said exposure aperture in said flexed condition; d. cocking means for moving each of said spring means from their respective relaxed conditions to their respective flexed conditions; e. means for releasably retaining each of said spring means in their respective flexed conditions; and f. means for releasing said first spring means to permit aperture unblocking movement thereof toward and to its relaxed condition for initiating an exposure interval and subsequently releasing said second spring means to permit aperture blocking movement thereof toward and to its relaxed condition for terminating said exposure interval.

Claim 7

Exposure control apparatus for a photographic camera comprising: a. means forming an exposure aperture; b. a first shutter blade formed by first spring means movable between flexed and relaxed conditions, said first spring means unblocking said exposure aperture in said relaxed condition and blocking said exposure aperture in said flexed condition; c. a second shutter blade formed by second spring means movable between flexed and relaxed conditions, said second spring means blocking said exposure aperture in said relaxed condition and unblocking said exposure aperture in said flexed condition; d. cocking means for moving each of said spring means from their respective relaxed conditions to their respective flexed conditions; e. means for releasably retaining each of said spring means in their respective flexed conditions; and f. means for releasing said first spring means to permit aperture unblocking movement thereof toward and to its relaxed condition for initiating an exposure interval and subsequently releasing said second spring means to permit aperture blocking movement thereof toward and to its relaxed condition for terminating said exposure interval.

Claim 8

Exposure control apparatus according to claim 5 wherein said first and second spring means are spirally wound in their respective relaxed condition conditions and are drawn from said spirally wound, relaxed condition for exposure influencing movement relative to said aperture.

Claim 9

Exposure control apparatus comprising: a. means forming an exposure aperture; b. a first shutter blade formed by first leaf spring means which is wound into a spiral configuration in its relaxed condition and is capable of being drawn from said relaxed condition for exposure influencing movement relative to said exposure aperture; c. first relatively small elongated support means attached to one end of said first leaf spring means and serving as a spool for receiving said first leaf spring means when it is in said relaxed condition and wound into said spiral configuration; d. first relatively large elongated support means attached to the opposite end of said first leaf spring means and serving as a spool for winding said first leaf spring means thereupon while drawing said first leaf spring means from its relaxed condition upon said first relatively small elongated support to position said first leaf spring means for exposure influencing movement relative to said exposure aperture when said first spring means is permitted to relax; e. a second shutter blade formed by second leaf spring means which is wound into a spiral configuration in its relaxed condition and is capable of being drawn from said relaxed condition for exposure influencing movement relative to said exposure aperture; f. second relatively small elongated support means attached to one end of said second leaf spring means and serving as a spool for receiving said second leaf spring means when it is in said relaxed condition and wound into said spiral configuration; g. second relatively large elongated support means attached to the opposite end of said second leaf spring means and serving as a spool for winding said second leaf spring means thereupon while drawing said second leaf spriNg means from its relaxed condition upon said second relatively small elongated support to position said second leaf spring means for exposure influencing movement relative to said exposure aperture when said first leaf spring means is permitted to relax; and h. means for releasably holding said first and second relatively large support means against rotation after said respective first and second leaf spring means have been wound thereon for releasably retaining said first and second leaf spring means in their respective tensioned positions and for sequentially releasing said first then said second relatively large support means to permit sequential relaxation of said first and then said second leaf spring means.

Claim 10

Exposure control apparatus comprising: a. means forming an exposure aperture; b. a first shutter blade formed by first leaf spring means which is wound into a spiral configuration in its relaxed condition and is capable of being drawn from said relaxed condition for exposure influencing movement relative to said exposure aperture; c. first relatively small elongated support means attached to one end of said first leaf spring means and serving as a spool for receiving said first leaf spring means when it is in said relaxed condition and wound into said spiral configuration; d. first relatively large elongated support means attached to the opposite end of said first leaf spring means and serving as a spool for winding said first leaf spring means thereupon while drawing said first leaf spring means from its relaxed condition upon said first relatively small elongated support to position said first leaf spring means for exposure influencing movement relative to said exposure aperture when said first spring means is permitted to relax; e. a second shutter blade formed by second leaf spring means which is wound into a spiral configuration in its relaxed condition and is capable of being drawn from said relaxed condition for exposure influencing movement relative to said exposure aperture; f. second relatively small elongated support means attached to one end of said second leaf spring means and serving as a spool for receiving said second leaf spring means when it is in said relaxed condition and wound into said spiral configuration; g. second relatively large elongated support means attached to the opposite end of said second leaf spring means and serving as a spool for winding said second leaf spring means thereupon while drawing said second leaf spriNg means from its relaxed condition upon said second relatively small elongated support to position said second leaf spring means for exposure influencing movement relative to said exposure aperture when said first leaf spring means is permitted to relax; and h. means for releasably holding said first and second relatively large support means against rotation after said respective first and second leaf spring means have been wound thereon for releasably retaining said first and second leaf spring means in their respective tensioned positions and for sequentially releasing said first then said second relatively large support means to permit sequential relaxation of said first and then said second leaf spring means.