Patent US3826684A successfully refreshed from Google Patents.
Patent US3925638A successfully refreshed from Google Patents.
US3925638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode cleaning means in an electric water heater
Assignee: Individual
•
Filing: 1973-06-20
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Granted: 1975-12-09
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Expires: 1993-06-20
Abstract
Abstract A flow through electric water heater of the type having carbon containing electrodes is disclosed herein. The heater has means for reducing the deposition of scale on the electrode surfaces. Water heaters of the type disclosed herein are normally operated on 110 or 220 volt alternating current maintained across the electrodes and a current passes through the water between the electrodes. Reduced deposition is brought about by the application of a direct current potential across the electrodes or by the use of an improved graphitic electrode containing metal particles or by both of these means in combination.
Inventors
- 👤 Guido J Scatoloni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:42
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/101; F24H1/106
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
134 words
A FLOW THROUGH ELECTRIC WATER HEATER OF THE TYPE HAVING A PLURALITY OF CARBON-CONTAINING ELECTRODES HELD IN A SPACED APART RELATIONSHIP WITHIN THE BODY OF SAID HEATER AND HAVING MEANS FOR SUPPLYING AN ALTERNATING CURRENT POTENTIAL BETWEEN A6ADJACENT ELECTRODES WHEREIN THE IMPROVEMENT COMPRISES: ELECTRODE CLEANING MEANS COMPRISING AT LEAST TWO ELECTRODES, EACH OF SAID ELECTRODES CONTAINING A SUBSTANTIAL AMOUNT OF CARBON, AN ELECTRODES FOR AN INTERMITTANT TIME A DIRECT CURRENT POTENTIAL OF BETWEEN 6 AND 220 VOLTS BETWEEN ADJACENT ELECTRODES FOR AN INTERMITTANT TIME INTERVAL SUFFICIENT TO CLEAN SAID ELECTRODE, SAID ELECTRIC CIRCUIT FURTHER BEING ADAPTED TO PROVIDE EACH ELECTRODE IN SAID HEATER WITH A POSITIVE CHARGE WITH RESPECT TO AN ADJACENT ELECTRODE WHEREBY DEPOSITS ARE REMOVED FROM THE SURFACE OF AN ELECTRODE DURING THE TIME AT WHICH A POSITIVE CHARGE IS APPLIED THERETO.
Claim 2
Dependent Claim
134 words
A FLOW THROUGH ELECTRIC WATER HEATER OF THE TYPE HAVING A PLURALITY OF CARBON-CONTAINING ELECTRODES HELD IN A SPACED APART RELATIONSHIP WITHIN THE BODY OF SAID HEATER AND HAVING MEANS FOR SUPPLYING AN ALTERNATING CURRENT POTENTIAL BETWEEN A6ADJACENT ELECTRODES WHEREIN THE IMPROVEMENT COMPRISES: ELECTRODE CLEANING MEANS COMPRISING AT LEAST TWO ELECTRODES, EACH OF SAID ELECTRODES CONTAINING A SUBSTANTIAL AMOUNT OF CARBON, AN ELECTRODES FOR AN INTERMITTANT TIME A DIRECT CURRENT POTENTIAL OF BETWEEN 6 AND 220 VOLTS BETWEEN ADJACENT ELECTRODES FOR AN INTERMITTANT TIME INTERVAL SUFFICIENT TO CLEAN SAID ELECTRODE, SAID ELECTRIC CIRCUIT FURTHER BEING ADAPTED TO PROVIDE EACH ELECTRODE IN SAID HEATER WITH A POSITIVE CHARGE WITH RESPECT TO AN ADJACENT ELECTRODE WHEREBY DEPOSITS ARE REMOVED FROM THE SURFACE OF AN ELECTRODE DURING THE TIME AT WHICH A POSITIVE CHARGE IS APPLIED THERETO.
Claim 3
Dependent Claim
17 words
The heater of claim 1 wherein said alternating current potential is about 110 volt 60 cycle potential.
Claim 4
Dependent Claim
17 words
The heater of claim 1 wherein said alternating current potential is about 220 volt 60 cycle potential.
Claim 5
Dependent Claim
17 words
The heater of claim 2 wherein said direct current potential is one half wave rectified alternating current.
Claim 6
Dependent Claim
25 words
The heater of claim 4 wherein said direct current potential is applied to each electrode for a period of from one half to ten seconds.
Claim 7
Dependent Claim
19 words
The heater of claim 5 wherein said direct current potential is applied between 1 1/2 and 5 second intervals.
Claim 8
Dependent Claim
16 words
The heater of claim 1 wherein said direct current potential is supplied from a storage battery.
Claim 9
Dependent Claim
26 words
The heater of claim 7 wherEin said battery is a 12-volt battery and the duration of said direct current potential is between one and ten seconds.
Claim 10
Dependent Claim
17 words
The heater of claim 8 wherein the duration of said direct current potential is about 5 seconds.
Claim 11
Dependent Claim
18 words
The heater of claim 1 wherein said direct current potential is started as said heater is turned off.
Claim 12
Dependent Claim
24 words
The heater of claim 1 wherein said direct current potential is applied when the current flow through said heater decreases to a predetermined value.
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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |