US4187502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swimming pool alarm system
Assignee: Individual
•
Filing: 1977-12-12
•
Granted: 1980-02-05
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Expires: 1997-12-12
Abstract
Abstract A swimming pool alarm system of the pressure transducer type employs an omnidirectional hydrophone which is held immersed in the swimming pool by means that mechanically decouples the hydrophone.
Inventors
- 👤 Frank O. Beverly
- 👤 Karl H. Nagel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:53
CPC Classifications
G; G08; G08B; G08B21/00; G08B21/02; G08B21/08; G08B21/082
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
103 words
A swimming pool alarm system comprising water-resistant hydrophone means for generating signals in response to received pressure variations in a range of frequencies between approximately 100 Hz and 10 kHz, means for holding said hydrophone means immersed in a swimming pool, said holding means substantially mechanically decoupling said hydrophone means, whereby said hydrophone means is responsive to substantially only pressure waves in the swimming pool, circuit means connected to said hydrophone means for generating an alarm signal when the signals from said hydrophone means exceed a predetermined threshold, and alarm means for generating a physically discernible alarm in response to said alarm signal.
Claim 2
Dependent Claim
103 words
A swimming pool alarm system comprising water-resistant hydrophone means for generating signals in response to received pressure variations in a range of frequencies between approximately 100 Hz and 10 kHz, means for holding said hydrophone means immersed in a swimming pool, said holding means substantially mechanically decoupling said hydrophone means, whereby said hydrophone means is responsive to substantially only pressure waves in the swimming pool, circuit means connected to said hydrophone means for generating an alarm signal when the signals from said hydrophone means exceed a predetermined threshold, and alarm means for generating a physically discernible alarm in response to said alarm signal.
Claim 3
Dependent Claim
18 words
The combination of claim 1 wherein said holding means includes a waterproof housing floatable in a swimming pool.
Claim 4
Dependent Claim
20 words
The combination of claim 1 wherein said holding means includes bracket means affixable to a portion of a swimming pool.
Claim 5
Dependent Claim
32 words
The combination of claim 1 further comprising means for protecting said hydrophone means from physical contact with the walls or floor of a swimming pool or with objects in a swimming pool.
Claim 6
Dependent Claim
11 words
The combination of claim 1 wherein said predetermined threshold is adjustable.
Claim 7
Dependent Claim
40 words
The combination of claim 1 wherein said circuit means and alarm means are located remotely from the swimming pool and said hydrophone means includes a hydrophone connected to a preamplifier and means for connecting said preamplifier to said circuit means.
Claim 8
Dependent Claim
16 words
The combination of claim 2 wherein said alarm means is located remotely from the swimming pool.
Claim 9
Dependent Claim
40 words
The combination of claim 7 wherein said circuit means is located in said housing and said circuit means includes a radio transmitter for transmitting said alarm signal and said alarm means includes a radio receiver for receiving said alarm signal.
Claim 10
Dependent Claim
21 words
The combination of claim 7 wherein said circuit means includes means for electrically connecting said alarm means to said hydrophone means.
Claim 11
Dependent Claim
13 words
The combination of claim 1 wherein said hydrophone means includes an omnidirectional hydrophone.
Claim 12
Dependent Claim
15 words
The combination of claim 1 wherein said alarm means generates a continual alarm until reset.
Claim 13
Dependent Claim
14 words
The combination of claim 2 wherein said housing is formed from corrosion resistant materials.
Claim 14
Dependent Claim
34 words
The combination of claim 1 further comprising means for testing said circuit means to verify the proper operation thereof, said means for testing including means for applying a test audio signal to said circuit.
Claim 15
Dependent Claim
38 words
The combination of claim 1 further comprising means for jointly testing said circuit means and alarm means to verify the proper operation thereof, said means for testing including means for applying a test audio signal to said circuit.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |