US3828164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooking device with an electrical temperature control
Assignee: Individual
•
Filing: 1972-11-21
•
Granted: 1974-08-06
•
Expires: 1992-11-21
Abstract
Abstract A regulator for an electric or gas hot plate comprises a freely movable control unit which is fixed to or can be placed upon a pan lid. The control unit includes a battery powered radio transmitter which transmits a signal when steam rises in the pan and is condensed in the control unit, the latter including a thermally responsive switch for switching on the transmitter. The signal is received by a receiver which controls a power switch for the hot plate. The battery can be a rechargeable accumulator which can be re-charged via an inductive coupling and a rectifier.
Inventors
- 👤 K Fischer
- 👤 W Niehaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:21
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/68; A; A47; A47J; A47J27/00; A47J27/56; A47J27/62; F; F24; F24C; F24C15/00; F24C15/10; F24C15/102; F24C15/105; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1902; G05D23/1905; G05D23/275; H05B2213/00; H05B2213/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
135 words
A controlled cooking device comprising a cooking vessel having closure means for covering the vessel; heating means for heating the cooking vessel; electrically operable switching means for the heating means; a receiver for controlling and electrically operating the switching means; and a control unit adapted to be placed onto the closure means of the cooking vessel so as to respond to the heat of condensing steam from the cooking vessel, said control unit comprising a housing, a transmitter, a source of electrical energy and a temperature responsive switching element for connecting said transmitter to said source whereby the transmitter transmits a signal when the switching element is actuated, said receiver being adapted to receive said signals from said transmitter and, in response thereto, to control said switching means so as to regulate the heating means.
Claim 2
Dependent Claim
135 words
A controlled cooking device comprising a cooking vessel having closure means for covering the vessel; heating means for heating the cooking vessel; electrically operable switching means for the heating means; a receiver for controlling and electrically operating the switching means; and a control unit adapted to be placed onto the closure means of the cooking vessel so as to respond to the heat of condensing steam from the cooking vessel, said control unit comprising a housing, a transmitter, a source of electrical energy and a temperature responsive switching element for connecting said transmitter to said source whereby the transmitter transmits a signal when the switching element is actuated, said receiver being adapted to receive said signals from said transmitter and, in response thereto, to control said switching means so as to regulate the heating means.
Claim 3
Dependent Claim
36 words
A controlled cooking device according to claim 1, in which said transmitter and said temperature responsive switching element are arranged such as to switch on said transmitter when condensing steam is detected by said switching element.
Claim 4
Dependent Claim
34 words
A controlled cooking device according to claim 1 in which said temperature responsive switching element comprises a bellows, a thermally expansible fluid in said bellows and an electrical snap switch actuable by said bellows.
Claim 5
Dependent Claim
25 words
A controlled cooking device according to claim 3, in which said fluid has the property that it boils slightly below the condensation temperature of steam.
Claim 6
Dependent Claim
35 words
A controlled cooking device according to claim 1 in which said source of electrical energy comprises a rechargeable electrical accumulator means and said controlled cooking device further includes charging means for recharging said accumulator means.
Claim 7
Dependent Claim
41 words
A controlled cooking device according to claim 5, in which said charging means serves for the storing of said control unit when not in use and in which said charging means and said control unit include contactless electrical power transmitting means.
Claim 8
Dependent Claim
27 words
A controlled cooking device as claimed in claim 6 in which said power transmitting means comprises inductive coupling means between said charging means and said control unit.
Claim 9
Dependent Claim
45 words
A controlled cooking device according to claim 1, wherein the closure means includes a removable lid for the cooking vessel, said lid having an opening and being adapted to removably receive said control unit so that steam can reach said control unit through said opening.
Claim 10
Dependent Claim
28 words
A controlled cooking device according to claim 1, wherein the closure means includes a removable lid for the cooking vessel, said control unit being connected to said lid.
Claim 11
Dependent Claim
48 words
A controlled cooking device accorDing to claim 1, wherein the closure means includes a removable lid for the cooking vessel, said control unit being received on said lid and said lid being formed as a steam dome having a highest region in which said control unit is located.
Claim 12
Dependent Claim
37 words
A controlled cooking device according to claim 1, in which the heating means includes an electric hot plate provided with a thermal protective switch for protection against over-heating, said hot plate being connected to said switching means.
Claim 13
Dependent Claim
92 words
A controlled cooking device according to claim 1, further comprising a plurality of cooking vessels each of which has closure means for covering said vessel, a plurality of heating means, a plurality of control units adapted to be placed onto the closure means of different cooking vessels and having transmitters tuned to transmit signals at different frequencies, a plurality of electrically operable switching means for the individual heating means, and a plurality of receivers for respectively controlling and electrically operating said switching means, said receivers being respectively tuned to said different frequencies.
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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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |