Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1989-03-10
1990-06-05
Steinberger, Brian S.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367131, 367136, 340566, H04R 102, H04B 106
Patent
active
049320092
ABSTRACT:
An apparatus and allied method for detecting the presence of submerged, possibly distressed swimmers in a body of water employs a plurality of pairs of transducers arranged on opposite sides of the body of water. Pulsed sequential excitation of the transducers is employed to monitor the body of water. A person disposed between a pair of transducers interrupts the transmission of ultrasonic waves. An alarm is triggered upon the interruption of the ultrasonic waves or after a delay to avoid false alarms, warning of the presence and location of a submerged, lingering swimmer even in the presence of other active swimmers in the body of water. The same apparatus can be employed as an intrusion detector to detect unauthorized entry of a person into an unguarded body of water.
REFERENCES:
patent: 1584613 (1926-05-01), Comstock et al.
patent: 2783459 (1957-02-01), Lienau et al.
patent: 4348902 (1982-09-01), Tachita et al.
patent: 4400695 (1983-08-01), Ritterbach et al.
patent: 4459689 (1984-07-01), Biber
patent: 4598293 (1986-07-01), Wong
patent: 4658385 (1987-04-01), Tsuji
patent: 4747085 (1988-05-01), Dunegan et al.
patent: 4811308 (1989-03-01), Michel
Sonar International, Inc.
Steinberger Brian S.
LandOfFree
Apparatus and method for detecting swimmers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for detecting swimmers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for detecting swimmers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-497322