Photographic remote slave flash apparatus

Apparatus adapted for use with a source of electrical energy for igniting a select flashlamp within a linear array thereof in substantial synchronism with the illumination of a scene from another transient source of illumination, comprising:

• means for mounting said array in an orientation for illuminating said scene from said select flashlamp and including terminal means electrically connectable in igniting relationship with said flashlamps;
• firing circuit means for electrically activating the said terminal means associated with said select flashlamp in response to energization by a select input condition;
• light detecting network means for providing a select output condition responsive to illumination from said transient source;
• timing circuit means responsive to said light detecting network means select output condition and converting from a first output condition to a second output condition at a predetermined interval of time from its response to said light detecting network means output condition;
• and
• means responsive to said timing means first output condition for deriving said firing means select input condition so as to effect said electrical activation of said terminal means and responsive to said timing means second output condition for removing said firing means select input condition after said predetermined interval of time thereby facilitating the protection of said firing circuit means from damage occassioned from too long a period of energization by said select input condition.