Stirring hot plate
First Claim
Patent Images
1. A hot plate for supporting a vessel holding a substance to be heated, the hot plate comprising:
- a plate having a generally horizontal upper surface adapted to support a vessel containing a substance to be heated;
an electrical heating element in a heat transfer relation with the plate;
a control electrically connected to the heating element; and
a control panel electrically connected to the control and including multiple visual displays comprising a hot plate graphic indicator and a multi-character display operable by the control to provide two independent visual indicators that the plate is hot-to-the-touch in response to a temperature of the plate being greater than a first temperature value, wherein the multi-character display is operable by the control to display a temperature of the plate in response to the control applying power to the heating element, and a first message, represented by characters, indicative of the plate being hot in response to the control removing power from the heating element and a temperature of the plate being greater than the first temperature value.
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Accused Products
Abstract
A stirring hot plate for simultaneously heating and stirring a mixture includes a phase controlled motor that spins magnets which couple to, and thereby spin, a stir bar within the mixture. In addition to spinning the magnets, the motor includes an operational mode in which the motor is rapidly braked thereby quickly spinning down the stir bar. The stirring hot plate also includes a visual indicator to the user that the platform is hot-to-the-touch that is especially effective when the stirring hot plate is not in use.
43 Citations
19 Claims
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1. A hot plate for supporting a vessel holding a substance to be heated, the hot plate comprising:
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a plate having a generally horizontal upper surface adapted to support a vessel containing a substance to be heated; an electrical heating element in a heat transfer relation with the plate; a control electrically connected to the heating element; and a control panel electrically connected to the control and including multiple visual displays comprising a hot plate graphic indicator and a multi-character display operable by the control to provide two independent visual indicators that the plate is hot-to-the-touch in response to a temperature of the plate being greater than a first temperature value, wherein the multi-character display is operable by the control to display a temperature of the plate in response to the control applying power to the heating element, and a first message, represented by characters, indicative of the plate being hot in response to the control removing power from the heating element and a temperature of the plate being greater than the first temperature value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A hot plate for supporting a vessel holding a substance to be heated, the hot plate comprising:
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a plate having a generally horizontal upper surface adapted to support a vessel containing a substance to be heated; an electrical heating element adapted to be in a heat transfer relation with the plate; a control electrically connected to the heating element; and a control panel electrically connected to the control and comprising a multi-character display being operable by the control to display a temperature value representing a temperature set point in response to the control applying power to the heating element, and a first message, represented by characters, indicative of the plate being hot in response to the control removing power from the heating element and a temperature of the plate being greater than a first temperature value. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. In a hot plate having a heating element for heating a plate supporting a vessel containing a substance to be heated, a control panel comprises a visual indicator indicating a plate temperature greater than a first temperature value, the improvement comprising:
display characters displaying a temperature of the plate in response to power being applied to the heating element, a first message comprising the word “
Off”
in response to power being removed from the heating element, and a second message comprising the word “
Hot” and
warning that the plate temperature is greater than the first temperature and power is removed from the heating element.
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16. In a hot plate having a heating element for heating a plate supporting a vessel containing a substance to be heated, a control panel comprises a visual indicator indicating a plate temperature greater than a first temperature value, the improvement comprising:
display characters displaying a temperature of the plate in response to power being applied to the heating element, a first message, represented by characters, in response to power being removed from the heating element, and a second message, represented by characters, warning that the plate temperature is greater than the first temperature and power is removed from the heating element wherein the first message is alternately displayed with the second message in response to power being removed from the heating element. - View Dependent Claims (17, 18, 19)
Specification