Patent US3683353A successfully refreshed from Google Patents.
US3683353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swimming pool alarm
Assignee: Gold Line Connector Inc
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Filing: 1970-03-20
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Granted: 1972-08-08
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Expires: 1990-03-20
Abstract
Abstract A simplified and highly sensitive swimming pool alarm having a solid-state circuit which responds to a water disturbance sensing unit in the pool and has means to adjust the sensor. The circuit, when energized, initiates an audible alarm which sounds continuously until a power switch is opened.
Inventors
- 👤 Martin E Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:17
CPC Classifications
G; G08; G08B; G08B21/00; G08B21/02; G08B21/08; G08B21/084
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
116 words
A swimming pool alarm apparatus comprising an electrically operated alarm including circuit means, a sensing unit disposed within the water of the swimming pool, said sensing unit being movable by disturbance of the water and having electrodes which are normally separated when the water is calm but which engage when the water is disturbed thereby causing movement of the unit, said sensing unit including a pendulum means having a flexible coil spring connection at the top thereof, a weight at the bottom thereof, and adjustably movable tubular sleeve means arranged to closely surround at least a portion of said spring length to vary the number of exposed coils and thereby change the sensitivity of the pendulum.
Claim 2
Dependent Claim
116 words
A swimming pool alarm apparatus comprising an electrically operated alarm including circuit means, a sensing unit disposed within the water of the swimming pool, said sensing unit being movable by disturbance of the water and having electrodes which are normally separated when the water is calm but which engage when the water is disturbed thereby causing movement of the unit, said sensing unit including a pendulum means having a flexible coil spring connection at the top thereof, a weight at the bottom thereof, and adjustably movable tubular sleeve means arranged to closely surround at least a portion of said spring length to vary the number of exposed coils and thereby change the sensitivity of the pendulum.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1 wherein the circuit means includes a solid state switching means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |