Patent US4080985A successfully refreshed from Google Patents.
US4080985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water level alarm apparatus
Assignee: Individual
•
Filing: 1976-06-17
•
Granted: 1978-03-28
•
Expires: 1996-06-17
Abstract
Abstract This disclosure pertains to a float, slideably confined within a tube and buoyantly positioned therealong as determined by the level of the water confined within a container such as a bathtub, swimming pool or the like. The float, upon reaching an upper position, closes a set of stationary contacts, which in turn, completes a series electrical circuit including an alarm bell and battery. Simultaneously with the closing of the contacts, an electrically operated solenoid valve, disposed in series with a pipe communicating to a water source used to fill the container, closes so as to halt any further increase in the water level within the container. Altering the length of the float, or varying the positioning of the contacts relative to the mouth of the container, adjusts the maximum level of water that may be disposed within the container.
Inventors
- 👤 John Eagle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:01
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/12; F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; G01; G01F; G01F23/00; G01F23/30; G01F23/64; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7423
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
211 words
A water level alarm and control apparatus comprising a float, a pair of stationary normally open contacts, said float urging said pair of normally open contacts into a closed circuited condition upon said float being buoyantly elevated by a fluid within a container, means to audibly signal said closed circuited condition, a power supply, said power supply providing energizing power for said audible signalling means, means to control the ingress of said fluid into said container, said control means terminating said ingress of said fluid into said container upon said closed circuited condition, means to disengageably connect said control means to a series circuit including said power supply and said pair of normally open contacts, said float comprises a multi-cellular plastic material possessing buoyant characteristics, a hollow tube, said tube having a passageway the longitudinal axis of said passageway being disposed along a vertical line, the upper end of said passageway being disposed beneath said pair of normally open contacts, said float having a cylindrical shape and being slideably disposed within said passageway, a plurality of holes within the walls of said hollow tube communicating with said passageway, a rod, said rod being removably affixed to said walls adjacent the other end of said hollow tube and traversing said passageway therein.
Claim 2
Dependent Claim
211 words
A water level alarm and control apparatus comprising a float, a pair of stationary normally open contacts, said float urging said pair of normally open contacts into a closed circuited condition upon said float being buoyantly elevated by a fluid within a container, means to audibly signal said closed circuited condition, a power supply, said power supply providing energizing power for said audible signalling means, means to control the ingress of said fluid into said container, said control means terminating said ingress of said fluid into said container upon said closed circuited condition, means to disengageably connect said control means to a series circuit including said power supply and said pair of normally open contacts, said float comprises a multi-cellular plastic material possessing buoyant characteristics, a hollow tube, said tube having a passageway the longitudinal axis of said passageway being disposed along a vertical line, the upper end of said passageway being disposed beneath said pair of normally open contacts, said float having a cylindrical shape and being slideably disposed within said passageway, a plurality of holes within the walls of said hollow tube communicating with said passageway, a rod, said rod being removably affixed to said walls adjacent the other end of said hollow tube and traversing said passageway therein.
Claim 3
Dependent Claim
44 words
The water level alarm and control apparatus as claimed in claim 1 wherein said control means comprises a normally open electrically operated solenoid valve, said solenoid valve being disposed intermediate a source of said fluid and a pipe communicating said fluid into said container.
Claim 4
Dependent Claim
33 words
The water level alarm and control apparatus as claimed in claim 2 wherein said connecting means comprises a plug electrically connected to said solenoid valve, a receptacle electrically connected to said series circuit.
Claim 5
Dependent Claim
19 words
The water level alarm and control apparatus as claimed in claim 1 wherein said power supply comprises a battery.
References Cited (Backward Citations)
US3185302A
Cited
US1525247A
Cited
US1646317A
Cited
US2663772A
Cited
US2780692A
Cited
DE1609195A1
Cited
US3849771A
Cited
US3863669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-27 | 1981-09-26 | 1982-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-27 | 1985-09-26 | 1986-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-27 | 1989-09-26 | 1990-03-28 | $7700.00 | Window Closed / Lapsed |