Patent US4313052A successfully refreshed from Google Patents.
US4313052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooking unit
Assignee: Individual
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Filing: 1979-04-03
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Granted: 1982-01-26
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Expires: 1999-04-03
Abstract
Abstract A cooking unit comprises at least two electric cooking plates, for example four such plates. Each plate can have a pair of electrical heating resistances. Power is supplied to each cooking plate via a switching unit, comprising a thermostat. Each thermostat switches on and off and is so arranged that when part or all of the power to one cooking plate is switched off power is supplied to another cooking plate connected downstream thereof.
Inventors
- 👤 Karl Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:00
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0227; H05B1/0252; H05B1/0258; H05B1/0261; H05B1/0266; F; F24; F24C; F24C15/00; F24C15/10; F24C15/102; F24C15/106
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
140 words
A cooking unit comprising: at least one cascade cooking unit, said cascade cooking unit including a favored cooking plate having at least two electric heating elements; at least one additional cooking plate having at least one heating element; a thermal sensor associated with said favored plate and responsive to at least one of said heating elements of said favored cooking plate; and, thermostatic switching means responsive to said thermal sensor, said switching means operating in a first mode to supply power solely to said elements of said favored plate, and in response to a predetermined temperature sensed by said sensor operating in a second mode to supply power to only one of said elements of said favored plate and to supply power to at least one of said elements of said at least one additional plate through a series connection.
Claim 2
Dependent Claim
140 words
A cooking unit comprising: at least one cascade cooking unit, said cascade cooking unit including a favored cooking plate having at least two electric heating elements; at least one additional cooking plate having at least one heating element; a thermal sensor associated with said favored plate and responsive to at least one of said heating elements of said favored cooking plate; and, thermostatic switching means responsive to said thermal sensor, said switching means operating in a first mode to supply power solely to said elements of said favored plate, and in response to a predetermined temperature sensed by said sensor operating in a second mode to supply power to only one of said elements of said favored plate and to supply power to at least one of said elements of said at least one additional plate through a series connection.
Claim 3
Dependent Claim
37 words
A cooking unit according to claim 1, wherein the thermostatic switching means operates in a third mode whereby power is supplied to said at least one additional plate and no power is supplied to said favored plate.
Claim 4
Dependent Claim
37 words
A cooking unit according to claim 1, wherein each of said at least one additional cooking units has a thermal sensor and a thermostatic switching means, each of said thermal switching means operating in said two modes.
Claim 5
Dependent Claim
37 words
A cooking unit according to claim 1, wherein the thermostatic switching means has at least one transfer contact for switching power between the favored cooking plate and said at least one cooking plate during the second mode.
Claim 6
Dependent Claim
59 words
A cooking unit according to claim 3, wherein each of the thermostatic switching means has at least two switching contacts which switch at successive temperatures, each of the switching contacts switching one of the heating elements, at least that one of the switching contacts responding to the highest temperature having a transfer contact connected to a subsequent cooking plate.
Claim 7
Dependent Claim
71 words
A cooking unit according to claim 5, wherein all of the cooking plates have at least two heating elements, each sensor being heated most directly by only one of the heating elements of its cooking plate defining a most effective heating element, the transfer contact connecting the switching contact of the least effective heating element of the favored cooking plate to the most effective heating element of the subsequent cooking plate.
Claim 8
Dependent Claim
33 words
A cooking unit according to claim 6, wherein each of the thermostatic switching means has a snap switch with a catch spring, said contacts cooperating with a catch spring contact at each end.
Claim 9
Dependent Claim
16 words
A cooking unit according to claim 1, wherein the thermostatic switching means has short switching periods.
Claim 10
Dependent Claim
22 words
A cooking unit according to claim 3, comprising a plurality of said cascade cooking units interconnected in series and/or parallel- inserted therefore.
Claim 11
Dependent Claim
39 words
A cooking unit according to claim 1, comprising a manually activatable switch, having a switching position in which all of the cooking plates are switched off and in which a connection to another electric cooking appliance is simultaneously provided.
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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) | 1985-01-25 | 1985-07-27 | 1986-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-25 | 1989-07-27 | 1990-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-25 | 1993-07-27 | 1994-01-26 | $7700.00 | Window Closed / Lapsed |