US3555221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purging liquid supply sensor
Assignee: Individual
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Filing: 1968-10-14
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Granted: 1971-01-12
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Expires: 1988-10-14
Abstract
Abstract A float including a magnet is mounted in a chamber for vertical travel in a liquid body, with a control switch adjacent the path of travel of the magnet for opening and closing of the switch in response to liquid level. A liquid inlet path leads to the bottom of the float chamber and an outlet path leads from the top of the chamber, with a bleedoff path extending between the bottom of the chamber and the outlet path and of small flow capacity relative to the inlet and outlet paths.
Inventors
- 👤 Jack J Booth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:43
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/64; G01F23/72; G01F23/74; H; H01; H01H; H01H35/00; H01H35/24; H01H35/40; H01H35/405; H01H36/00; H01H36/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
160 words
A self-purging liquid supply sensor which comprises: a. structure having a base portion and a vertical bore therein with an inlet channel leading to the bottom of said base for flow of liquid thereto, and an outlet channel leading from the top of said bore for flow of liquid therefrom and a bleedoff channel extending between the bottom of said bore and said outlet channel and being of flow capacity which is small compared with the capacities of said inlet and outlet channels such that primary liquid flow is through said vertical bore and said outlet channel, said bleedoff channel acting to drain off accumulated liquid within said vertical bore when the flow of liquid is terminated; b. a float having a permanent magnet which moves axially in liquid in said vertical bore; and c. a switch mounted adjacent to said vertical bore and responsive to a change in location of said magnet to alter the state of said switch.
Claim 2
Dependent Claim
160 words
A self-purging liquid supply sensor which comprises: a. structure having a base portion and a vertical bore therein with an inlet channel leading to the bottom of said base for flow of liquid thereto, and an outlet channel leading from the top of said bore for flow of liquid therefrom and a bleedoff channel extending between the bottom of said bore and said outlet channel and being of flow capacity which is small compared with the capacities of said inlet and outlet channels such that primary liquid flow is through said vertical bore and said outlet channel, said bleedoff channel acting to drain off accumulated liquid within said vertical bore when the flow of liquid is terminated; b. a float having a permanent magnet which moves axially in liquid in said vertical bore; and c. a switch mounted adjacent to said vertical bore and responsive to a change in location of said magnet to alter the state of said switch.
Claim 3
Dependent Claim
50 words
The liquid supply sensor of claim 1, wherein said outlet channel extends from the top of said bore downwardly parallel to said bore to a region adjacent the bottom of said base, said bleedoff channel extending from the bottom of said bore and the lowermost part of said outlet channel.
Claim 4
Dependent Claim
25 words
The liquid supply sensor of claim 2 wherein said bleedoff channel extends horizontally for a relatively short length between said bore and said outlet channel.
Claim 5
Dependent Claim
28 words
The liquid supply sensor of claim 2 wherein said switch comprises a reed relay switch movable between open and closed positions in response to a varying magnetic field.
Claim 6
Dependent Claim
23 words
The liquid supply sensor of claim 2 wherein said float comprises a cylindrical casing with said magnet mounted in the center region thereof.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |