Patent US3617698A successfully refreshed from Google Patents.
US3617698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vaporizer apparatus
Assignee: Faberge Inc
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Filing: 1970-02-11
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Granted: 1971-11-02
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Expires: 1990-02-11
Abstract
Abstract An electrical heater for liquids, particularly an electrode plate water vaporizer, is proofed against electrical shock hazard by insuring that current paths through the liquid into possible contact with the user are elongated, discontinuous, and on filling when the hazard is greatest, are completely interrupted to assure safety even under negligent handling.
Inventors
- 👤 Robert H Duncanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:44
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/02; F24F6/025; A; A61; A61M; A61M11/00; A61M11/04; A61M11/041; B; B01; B01D; B01D1/00; Y; Y10; Y10S; Y10S128/00; Y10S128/909
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
147 words
A water heater having a container and spaced electrodes in the container for heating water by passing current from one electrode to the other through the water and in which means for filling the container are provided comprising a conduit having a downwardly sloping floor with an upper inlet end and terminating in a lower discharge end disposed over an entrance to the container remote frOm the electrodes, a filling receptacle having a drop forming exit orifice positioned above the inlet end of the conduit, the arrangement being such that water introduced to the filling receptacle will flow from its orifice in drops which fall to the inlet end of the conduit and thence downwardly to fall from the discharge end of the conduit into the container, whereby discontinuity is imparted to the flow of water to enchance its resistance to the passage of electrical current therethrough.
Claim 2
Dependent Claim
147 words
A water heater having a container and spaced electrodes in the container for heating water by passing current from one electrode to the other through the water and in which means for filling the container are provided comprising a conduit having a downwardly sloping floor with an upper inlet end and terminating in a lower discharge end disposed over an entrance to the container remote frOm the electrodes, a filling receptacle having a drop forming exit orifice positioned above the inlet end of the conduit, the arrangement being such that water introduced to the filling receptacle will flow from its orifice in drops which fall to the inlet end of the conduit and thence downwardly to fall from the discharge end of the conduit into the container, whereby discontinuity is imparted to the flow of water to enchance its resistance to the passage of electrical current therethrough.
Claim 3
Dependent Claim
38 words
The water heater as defined in claim 1 in which the downward slope of the floor of the conduit accelerates the velocity of flow of water to thereby reduce its average cross-sectional area to increase its electrical resistance.
Claim 4
Dependent Claim
111 words
A heater for liquids comprising a nonconductive outer housing, a nonconductive liquid heating chamber having a top wall and including an electrical heater means, said heating chamber being enclosed within the outer housing, said heating chamber being spaced away from the interior surfaces of the outer housing by means of elongated electrically nonconductive support members, a filling receptacle for receiving liquid to be conveyed to the heating chamber, said filling receptacle having a drop forming exit orifice, and conduit means leading from a position below the exit orifice to an entrance to the heating chamber, whereby a stream of filling liquid is discontinuous to interrupt a flow of electrical current therethrough.
Claim 5
Dependent Claim
111 words
A heater for liquids comprising a nonconductive outer housing, a nonconductive liquid heating chamber having a top wall and including an electrical heater means, said heating chamber being enclosed within the outer housing, said heating chamber being spaced away from the interior surfaces of the outer housing by means of elongated electrically nonconductive support members, a filling receptacle for receiving liquid to be conveyed to the heating chamber, said filling receptacle having a drop forming exit orifice, and conduit means leading from a position below the exit orifice to an entrance to the heating chamber, whereby a stream of filling liquid is discontinuous to interrupt a flow of electrical current therethrough.
Claim 6
Dependent Claim
29 words
The heater of claim 3 wherein the conduit is inclined to increase the velocity of the flowing liquid to decrease its cross-sectional area and thereby increase its electrical resistance.
Claim 7
Dependent Claim
49 words
The heater of claim 3 wherein the conduit terminates in a position above the entrance to the heating chamber to cause the liquid to fall from that end of the conduit into the heating chamber in the form of drops to further interrupt the flow of electrical current therethrough.
Claim 8
Dependent Claim
56 words
The heater of claim 3 wherein the entrance to the heating chamber is located at an elevation lower than the top wall of the heating chamber to form within the chamber an air lock whereby the heating chamber cannot be completely filled with liquid to preserve a vapor space above the liquid within the heating chamber.
Claim 9
Dependent Claim
65 words
The heater of claim 6 wherein the outer housing includes drain holes to discharge liquid which may appear in the space between the heating chamber and the interior of the outer housing and wherein such drain holes are located remote from the support members to maximize the length of a conductive path and its resistance to current flow to the exterior of the outer housing.
Claim 10
Dependent Claim
27 words
The heater of claim 6 wherein the heating chamber is provided with sharp edges and corners to render discontinuous a film of liquid on its outer surface.
Claim 11
Dependent Claim
124 words
A water vaporizer comprising a nonconductive heating chamber including an electrode plate water-heating means and a top wall, and a nonconductive outer housing including a vapor exit port and a water filling receptacle, the heating chamber being spaced away from the interior surface of the outer housing by elongated support members, the heating chamber having an opening in its top wall for filling and for discharge of vapor, the vapor exit port being in communication with said opening, the water-filling receptacle including a drop forming exit orifice, and an inclined channel means for conveying filling water downwardly from a position below the drop forming orifice to said opening whereby the steam of filling water is discontinuous to interrupt the flow of electrical current therethrough.
Claim 12
Dependent Claim
124 words
A water vaporizer comprising a nonconductive heating chamber including an electrode plate water-heating means and a top wall, and a nonconductive outer housing including a vapor exit port and a water filling receptacle, the heating chamber being spaced away from the interior surface of the outer housing by elongated support members, the heating chamber having an opening in its top wall for filling and for discharge of vapor, the vapor exit port being in communication with said opening, the water-filling receptacle including a drop forming exit orifice, and an inclined channel means for conveying filling water downwardly from a position below the drop forming orifice to said opening whereby the steam of filling water is discontinuous to interrupt the flow of electrical current therethrough.
Claim 13
Dependent Claim
21 words
The vaporizer of claim 9 wherein the heating chamber is provided with sharp edges to interrupt a surface film of water.
Claim 14
Dependent Claim
33 words
The vaporizer of claim 9 wherein said opening is at an elevation below the maximum interior elevation of the heating chamber to thereby preserve a vapor space above the liquid in the chamber.
Claim 15
Dependent Claim
45 words
The vaporizer of claim 9 wherein said opening is at the end of the heating chamber remote from The electrode plate heating means whereby said heating means are not immersed when the vaporizer is tipped to drain liquid from the heating chamber through said opening.
Claim 16
Dependent Claim
29 words
The vaporizer of claim 9 wherein the vapor exit port and said opening are not in alignment to exclude instrumentalities from contact with the water in the heating chamber.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |