Illumination – Supported by vehicle structure – Condition responsive
Patent
1994-03-21
1996-01-23
Mathews, A. A.
Illumination
Supported by vehicle structure
Condition responsive
362 18, 362285, G03B 1505
Patent
active
054868866
ABSTRACT:
A variable angle flash for a photographic camera has a flash tube and a reflector that are relatively movable along an optical axis. A linear motor in the camera drives a follower connected with one of the flash tube and reflector members for moving the flash tube (or reflector) along the axis to vary the illumination angle of the flash. Optionally, the motor is a linear form of ultrasonic wave motor of which the follower forms a movable portion. An elastic body engaging the follower and fixed to the camera case carries piezoelectric elements that undulate the body when subjected to ultrasonic alternating currents, causing the body to move the follower and drive the flash tube (or reflector) along the optical axis and thereby vary the illumination angle.
REFERENCES:
patent: 3839632 (1974-10-01), Fedrico
patent: 4023888 (1977-05-01), Klaenhammer et al.
patent: 4462666 (1984-07-01), Orban
patent: 4821053 (1989-04-01), Dowe et al.
patent: 4914461 (1990-04-01), Hori
patent: 4935759 (1990-06-01), Tsuji et al.
patent: 5036402 (1991-07-01), Shiota
patent: 5050044 (1991-09-01), Shibayama
patent: 5126778 (1992-06-01), Wheeler et al.
New Type Ultrasonic Motor; Techno Japan, vol. 19--No. 5, May 1986, pp. 67-69.
New Ideas in Motion; PCIM, Apr. 1987, pp. 37-39.
Akiyama, Dr. Yuji; Present State of Ultrasonic Motors in Japan; Journal of Electrical Engineering (JEE), Apr. 1987, pp. 76-80, Dempa Publications, N.Y.
Ise. Yukihiko; Traveling Wave Ultrasonic Motors Offer High Conversion Efficiency. (Date Unknown).
Ultrasonic Motor, 17 pages, (Author and Date unknown).
Bilinski Peter J.
Eastman Kodak Company
Mathews A. A.
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