US3877475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safe lighting gas valve
Assignee: Honeywell Inc
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Filing: 1973-10-17
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Granted: 1975-04-15
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Expires: 1993-10-17
Abstract
Abstract A gas control has a safety valve for stopping the flow of gas from an inlet to an outlet when an electromagnet, connected to a thermocouple heated by a flame produced by gas flow through the safety valve, is de-energized to allow an armature to move away from the electromagnet. A lever means connecting the safety valve and the armature has a latching means which can be unlatched upon movement of a manual control knob to an off position to allow the safety valve to close even though the electromagnet is still energized by a hot thermocouple. If the manual control knob is turned on soon after being turned off, the safety valve cannot be opened. When the thermocouple cools, at which time the armature is released and the latching means relatches the lever means, the safety valve may then be opened.
Inventors
- 👤 Paul Dietiker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:45
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/10; F23N5/107; F23Q; F23Q9/00; F23Q9/08; F23Q9/12; F23Q9/14; F23N2235/00; F23N2235/12; F23N2235/20; F23N2235/24; Y; Y10; Y10T; Y10T137/00; Y10T137/1407; Y10T137/1516
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
267 words
A gas control comprising: a housing having an inlet and an outlet, a manually operable control means having a rotary and axially movable shaft for controlling the flow of gas betwEen said inlet and said outlet, a safety valve for stopping the flow of gas from said inlet to said outlet, an electromagnet adapted to be energized by the heating of a thermocouple by a flame produced by gas flow through said safety valve, an armature movably associated with said electromagnet and to be held in one position when said electromagnet is energized by the presence of a flame and to drop to a second position when the flame goes out, lever means operably connecting said safety valve and said armature to hold said safety valve open when said armature is held in said one position, said lever means having a latching means which upon being unlatched said safety valve can close even though said armature remains in said one position, means connecting said manual control means to said lever means to move said armature against said electromagnet when said control means is moved axially to open said safety valve, and means associated with said manually operable control means for unlatching said latching means when said manual control means is rotated to a position to terminate or nearly terminate the gas flow whereby said safety valve closes even though said electromagnet is still energized by a hot thermocouple, said latching means relatching when said armature returns to said second position upon said electromagnet being de-energized and said manually operably control means being moved from said unlatching position.
Claim 2
Dependent Claim
267 words
A gas control comprising: a housing having an inlet and an outlet, a manually operable control means having a rotary and axially movable shaft for controlling the flow of gas betwEen said inlet and said outlet, a safety valve for stopping the flow of gas from said inlet to said outlet, an electromagnet adapted to be energized by the heating of a thermocouple by a flame produced by gas flow through said safety valve, an armature movably associated with said electromagnet and to be held in one position when said electromagnet is energized by the presence of a flame and to drop to a second position when the flame goes out, lever means operably connecting said safety valve and said armature to hold said safety valve open when said armature is held in said one position, said lever means having a latching means which upon being unlatched said safety valve can close even though said armature remains in said one position, means connecting said manual control means to said lever means to move said armature against said electromagnet when said control means is moved axially to open said safety valve, and means associated with said manually operable control means for unlatching said latching means when said manual control means is rotated to a position to terminate or nearly terminate the gas flow whereby said safety valve closes even though said electromagnet is still energized by a hot thermocouple, said latching means relatching when said armature returns to said second position upon said electromagnet being de-energized and said manually operably control means being moved from said unlatching position.
Claim 3
Dependent Claim
25 words
The invention of claim 1 wherein said lever means comprises a first part connected to said armature and a second part connected to said valve.
Claim 4
Dependent Claim
92 words
The invention of claim 1 wherein said manually operable control means comprises a control knob connected to said shaft for rotary movement of said control means and axial movement of said control means, and an arm connected to said shaft whereby upon a predetermined axial movement of said shaft, said arm engages said lever means to move said armature against said electromagnet and open said safety valve and upon rotary movement of said shaft to a predetermined position, said arm engages said latching means to unlatch said safety valve from said armature.
Claim 5
Dependent Claim
20 words
The invention of claim 3 wherein said control means is a rotary valve connected in series with said safety valve.
Claim 6
Dependent Claim
181 words
The invention of claim 1 wherein said lever means comprises a first lever pivotally mounted on a shaft attached to said housing, said first lever being operably connected to said safety valve and spring biased in a direction to move said valve against a valve seat in said housing, a second lever pivotally mounted on said shaft, said second lever being operably connected to said armature and spring biased in a direction away from said electromagnet, said latching means comprising a key on one of said levers engaging a hole in the other of said levers for holding said levers together to operably connect said safety valve and said armature, said manually operable control means having an arm on said shaft, said arm engaging one of said levers upon movement of said control means to open said safety valve and to move said armature against said electromagnet, and said arm unlatching said key from said hole to close said safety valve when said control means is moved to a predetermined position even though said armature is still held against said electromagnet.
References Cited (Backward Citations)
US2988098A
Cited
US3099994A
Cited
US3303866A
Cited
US3461894A
Cited
US3451407A
Cited
US3574308A
Cited
US3682188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |