Flash unit with electronic exposure setting calculator

Details Flash unit with electronic exposure setting calculator Flash unit with electronic exposure setting calculator

1977-03-07

1978-10-10

Malzahn, David H.

Boots, shoes, and leggings

235 647, G06F 738

Patent

active

041200381

ABSTRACT:
The flash unit, particularly an electronic flash unit, is used with photographic cameras, and the like. The flash unit is provided with an electronic calculator which the photographer uses for calculating the numerical values of camera settings to be established for flash exposure, such as f-number, subject distance, and the like. The electronic calculator forms with the remainder of the flash unit a single camera accessory unit. Components of the calculating circuitry and of the flash unit circuitry are accommodated within a common housing and powered by a common power source. The display of the electronic calculator is located on the exterior of the flash unit, as is also the manually settable input stage of the calculator. The input stage comprises a pushbutton keyboard including digit and arithmetic-operation keys. Alternatively, the input stage is comprised of calibrated scales cooperating with multi-position sliders each capable of assuming only a plurality of discrete positions along the respective calibrated scale.

REFERENCES:
patent: 2974576 (1961-03-01), Hahn
patent: 2978949 (1961-04-01), Seeger
patent: 3443749 (1969-05-01), Cimetta
patent: 3769888 (1973-11-01), Quinn
patent: 3803834 (1974-04-01), Reese
patent: 3857024 (1974-12-01), Kosaka
patent: 3865994 (1975-02-01), Bender
patent: 3903397 (1975-09-01), Yata et al.

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