Measuring and testing – Barometer – Aneroid
Patent
1988-10-11
1990-07-03
Orsino, Joseph A.
Measuring and testing
Barometer
Aneroid
73384, 73705, 25023119, G01L 706
Patent
active
049380621
ABSTRACT:
A barometric meter such as barometer or a barometric altimeter comprises a vacuum chamber having a movable portion which displaces in proportion to air pressure. An aperture plate for allowing a light beam to pass therethrough is mounted to the movable portion of the vacuum chamber, and a light source stationary relative to the vacuum chamber is provided for illuminating the aperture plate. A photoelectric position detector disposed on the other side of the light source relative to the aperture plate and stationary to the vacuum chamber is provided for receiving the light beam which passes through the aperture in the aperture plate and for supplying an output indicative of the positional change of the light beam impinging on the photo-electric position detector. The output of the detector may be digitally displayed on a display as either air pressure or altitude.
REFERENCES:
patent: 3308303 (1967-03-01), Weichselbaum et al.
patent: 3590259 (1971-06-01), Johnston
patent: 3612881 (1971-10-01), King
patent: 3916185 (1975-10-01), Jehly
patent: 4086488 (1978-04-01), Hill
patent: 4109147 (1978-08-01), Heske
patent: 4364271 (1982-12-01), Froome
patent: 4403512 (1983-09-01), Nakahama
patent: 4665747 (1987-05-01), Muscatell
Nakabayashi Shotaro
Ohgushi Masahiko
Shimizu Shuhei
Burns Robert E.
Lobato Emmanuel J.
Mimy Electronics Co., Ltd.
Orsino Joseph A.
Sanoh Instrument Co., Ltd.
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