Patent US3577908A successfully refreshed from Google Patents.
US3577908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Egg cooker
Assignee: Russell Hobbs Inc
•
Filing: 1969-06-02
•
Granted: 1971-05-11
•
Expires: 1989-06-02
Abstract
Abstract An egg cooker is disclosed which utilizes an electrically heated, covered water container. During the operation of the cooker the amount of heat supplied to the container is regulated by an adjustable thermostat operating essentially as an infinite switch. This thermostat regulates the heat supplied so that the cooking time is varied in accordance with the rate at which water is boiled in the container and escapes from the container past the lid as steam. A fixed thermostat is provided to shut off the power to the heating element used when all water has been evaporated.
Inventors
- 👤 Frederick J Burg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:41
CPC Classifications
A; A47; A47J; A47J29/00; A47J29/02; A47J27/00; A47J27/004
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
243 words
A cooking device which comprises: a container including a receptacle for holding a fixed quantity of water said container being adapted to have a food support mounted therein; an electric heating element located with respect to said container so that when said heating element is operating heat from said heating element is transferred to the water in said container; an adjustable switch means capable of periodically opening and closing in accordance with its adjustment for governing the operation of said heating element connected in a series circuit with said heating element; a fixed thermostat connected in said circuit in series with said adjustable switch means and said heating element, said fixed thermostat being located so as to be operated by the temperature of said container; said fixed thermostat being capable of opening said circuit upon an increase in the temperature of said container caused by all of the water in said container being boiled from said container through the operation of said heating element; said adjustable switch means opening and closing said circuit in response to the temperature of said electric heating element so as to act as an infinite switch to allow a current to pass to said heating element in order to boil water from said container at a rate which is dependent upon the setting of said adjustable switch means, the operation of said adjustable switch means serving to regulate the time required to vaporize said fixed quantity of water.
Claim 2
Dependent Claim
243 words
A cooking device which comprises: a container including a receptacle for holding a fixed quantity of water said container being adapted to have a food support mounted therein; an electric heating element located with respect to said container so that when said heating element is operating heat from said heating element is transferred to the water in said container; an adjustable switch means capable of periodically opening and closing in accordance with its adjustment for governing the operation of said heating element connected in a series circuit with said heating element; a fixed thermostat connected in said circuit in series with said adjustable switch means and said heating element, said fixed thermostat being located so as to be operated by the temperature of said container; said fixed thermostat being capable of opening said circuit upon an increase in the temperature of said container caused by all of the water in said container being boiled from said container through the operation of said heating element; said adjustable switch means opening and closing said circuit in response to the temperature of said electric heating element so as to act as an infinite switch to allow a current to pass to said heating element in order to boil water from said container at a rate which is dependent upon the setting of said adjustable switch means, the operation of said adjustable switch means serving to regulate the time required to vaporize said fixed quantity of water.
Claim 3
Dependent Claim
48 words
A cooking device as claimed in claim 1 wherein: said adjustable switch means is an adjustable thermostat and is located so as to receive heat from said heating element during the operation of said heating element; said fixed thermostat is mounted on said container adjacent to said receptacle.
Claim 4
Dependent Claim
36 words
A cooking device as claimed in claim 1 wherein said electric heating element surrounds said receptacle and said adjustable thermostat is mounted on said container on the side of said heating element remote from said receptacle.
Claim 5
Dependent Claim
46 words
A cooking device as claimed in claim 1 including cover means for controlling steam given off from said container located on said container, said cover means being constructed so as to allow the escape of steam from the area between said container and said cover means.
Claim 6
Dependent Claim
192 words
A cooking device having a cooking container, said container being adapted to hold a quantity of water, an electric heating element located with respect to said container so that when current is applied to said heating element heat from said element is transferred to water in said container, and fixed thermostat means connected in series with said heating element, said fixed thermostat means being capable of being actuated so as to open upon a rise in the temperature of said container caused by the vaporization of all water from the interior of said container, in which the improvement comprises a switch means for controlling the flow of electric current to said heating element when said thermostat means is closed so as to pass a current to said heating element, said switch means being connected in series with said thermostat means and said heating element, said switch means being capable of opening and closing periodically during the operation of said cooking device so as to regulate the heat given off by said heating element in order to vary the time required for a given quantity of water to be vaporized from said container.
Claim 7
Dependent Claim
192 words
A cooking device having a cooking container, said container being adapted to hold a quantity of water, an electric heating element located with respect to said container so that when current is applied to said heating element heat from said element is transferred to water in said container, and fixed thermostat means connected in series with said heating element, said fixed thermostat means being capable of being actuated so as to open upon a rise in the temperature of said container caused by the vaporization of all water from the interior of said container, in which the improvement comprises a switch means for controlling the flow of electric current to said heating element when said thermostat means is closed so as to pass a current to said heating element, said switch means being connected in series with said thermostat means and said heating element, said switch means being capable of opening and closing periodically during the operation of said cooking device so as to regulate the heat given off by said heating element in order to vary the time required for a given quantity of water to be vaporized from said container.
Claim 8
Dependent Claim
76 words
A cooking device as claimed in claim 5 wherein said switch means is an adjustable thermostat and is located with respect to said heating element so as to receive heat from said heating element during the operation of said heating element so as to open and close periodically when current can be passed by said thermostat means, the rate at which said adjustable thermostat opens and closes being determined by the setting of said adjustable thermostat.
Claim 9
Dependent Claim
49 words
A cooking device as claimed in claim 5 including cover means for controlling the steam given off from said container, said cover means being located on said container and being constructed so as to allow the escape of steam from the area between said container and said cover means.
Claim 10
Dependent Claim
47 words
A cooking device as claimed in claim 5 wherein said container includes a receptacle for holding a fixed quantity of water, said switch means serving to vary the time required to vaporize said fixed quantity of water when a current is passed by said fixed thermostat means.
Claim 11
Dependent Claim
114 words
A cooking device as claimed in claim 5 wherein: said switch means is an adjustable thermostat and is located with respect to said heating element so as to receive heat from said heating element during the operation of said heating element so as to open and close periodically when current can be passed by said thermostat means, the rate at which said adjustable thermostat opens and closes being determined by the setting of said adjustable thermostat; said container includes a receptacle for holding a fixed quantity of water, said switch means serving to vary the time required to vaporize said fixed quantity of water when a current is passed by said fixed thermostat means.
Claim 12
Dependent Claim
52 words
A cooking device as claimed in claim 9 wherein said electric heating element is located around said receptacle, said fixed thermostat means is secured to said receptacle within said electric heating element and said adjustable thermostat is mounted on said container on the side of said heating element remote from said receptacle.
Claim 13
Dependent Claim
49 words
A cooking device as claimed in claim 10 including cover means for controlling the steam given off from said container, said cover means being located on said container and being constructed so as to allow the escape of steam from the area between said container and said cover means.
References Cited (Backward Citations)
US2445021A
Cited
US2518566A
Cited
US2562763A
Cited
US2806123A
Cited
US2761375A
Cited
US2807701A
Cited
US3147689A
Cited
US3396655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |