US3574330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensor control
Assignee: Autotrol Corp
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Filing: 1969-04-23
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Granted: 1971-04-13
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Expires: 1989-04-23
Abstract
Abstract A water softener sensor control transmits the output of a motor in response to hardness of periodic water samples. The motor drives a timing gear that periodically actuates a control assembly to slide a cam member to open a valve in a resin containing chamber to admit a water sample, and to drop a plunger on the resin to detect its volume. If the water is hard, the resin shrinks and a latch on the plunger actuates an output assembly driven through a gear train by the motor to rotate an output shaft. This control also includes means for varying the level from which water samples are taken, and several novel mechanisms disclosed in detail.
Inventors
- 👤 David G Prosser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:47
CPC Classifications
B; B01; B01J; B01J49/00; B01J49/80; B01J49/85; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
159 words
An automatic sensing and regeneration control for a fluid treatment means comprising the combination of: a fluid treatment tank for receiving a fluid to be treated; a regeneratable ion exchanger in said fluid treatment tank to contact said fluid to change a condition of said fluid; a sensing means communicating with said interior of said tank, including a sensing chamber containing a volume responsive material with means to detect changes in the volume of said material to periodically sense said condition of said fluid at a predetermined location in said tank and to register said condition; an adjustable timing mechanism coupled to said sensing means to automatically control said sensing means to periodically sense said condition of said fluid at desired times; and an output means coupled to said sensing means to trigger an output for regenerating said ion exchanger in said fluid treatment tank when said sensing means register a predetermined state of said condition of said fluid.
Claim 2
Dependent Claim
159 words
An automatic sensing and regeneration control for a fluid treatment means comprising the combination of: a fluid treatment tank for receiving a fluid to be treated; a regeneratable ion exchanger in said fluid treatment tank to contact said fluid to change a condition of said fluid; a sensing means communicating with said interior of said tank, including a sensing chamber containing a volume responsive material with means to detect changes in the volume of said material to periodically sense said condition of said fluid at a predetermined location in said tank and to register said condition; an adjustable timing mechanism coupled to said sensing means to automatically control said sensing means to periodically sense said condition of said fluid at desired times; and an output means coupled to said sensing means to trigger an output for regenerating said ion exchanger in said fluid treatment tank when said sensing means register a predetermined state of said condition of said fluid.
Claim 3
Dependent Claim
80 words
An automatic sensing and regeneration control for a fluid treatment means as set forth in claim 1 wherein part of said sensing means is mounted externally of said fluid treatment tank and said sensing means includes a tube communicating through a wall of said tank between said part and said interior of said tank, said tube being adjustable externally of said tank to vary the location within the interior of said tank where said fluid condition is to be sensed.
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |