Photographic apparatus with dual function sonic transducer

Details Photographic apparatus with dual function sonic transducer Photographic apparatus with dual function sonic transducer

1981-03-30

1982-05-25

Adams, Russell E.

354127, 354198, 354217, 354289, G03B 1320, G03B 1736, G03B 1718

Patent

active

043314090

ABSTRACT:
An autofocusing camera having an ultrasonic ranging system, formed in part by a sonic transducer, for measuring subject distance is provided with an audio system which incorporates the same sonic transducer for providing the camera operator with audible information, such as warning signals indicating that the camera is out of film or that the flash illumination system is not in its operative or ready state.

REFERENCES:
patent: 3608454 (1971-09-01), Shenk
patent: 3774516 (1973-11-01), Burgarella et al.
patent: 4005449 (1977-01-01), Ellin
patent: 4064519 (1977-12-01), Kee
patent: 4085297 (1978-04-01), Paglia
patent: 4156567 (1979-05-01), Ostrowski
patent: 4168895 (1979-09-01), Pizzuti
patent: 4199246 (1980-04-01), Muggli

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