Multilamp photoflash unit

Details Multilamp photoflash unit Multilamp photoflash unit

1977-10-07

1979-05-22

Shoop, William M.

Illumination

Photographic lighting

Plural light sources or light source supports

362 5, G03B 1502

Patent

active

041562690

ABSTRACT:
A photoflash unit comprising two parallel columns of horizontally disposed lamps mounted in a planar array with flash indicators aligned behind each lamp. The lamps of one column are staggered with respect to the other, and the two columns are located on opposite sides of the vertical centerline of the unit. The lamps are connected to switching circuitry for sequentially flashing the lamps in response to firing pulses applied to a connector at one end of the unit. The two columns of staggered lamps are positioned so that the lowest lamp is located on the side of the unit centerline opposite that on which the lens axis is located when the unit is connected to a camera, thereby farther removing the closest lamp from the lens axis to minimize the "red-eye" effect. The switching circuitry is connected to provide an order of flashing that proceeds alternately between the two columns from the lowest to the highest lamp of the array, thereby providing a more readily interpretable flash indicator pattern.

REFERENCES:
patent: 3614412 (1971-10-01), Bellows
patent: 4053757 (1977-10-01), Blount
patent: 4059387 (1977-11-01), Witterick et al.

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