Control for an electric heating device for providing consistent heating results
First Claim
Patent Images
1. An electrical device for generating heat for a predetermined period of time, said electrical device comprising:
- a. a heating cavity;
b. a heating element powered by an operating voltage having a magnitude, said heating element being disposed within said heating cavity;
c. a first circuit which generates a control voltage wherein said control voltage varies as a function of said magnitude of said operating voltage; and
d. a second circuit, coupled to said first circuit, which varies the duration of said period of time as a function of said control voltage generated by said first circuit, wherein said period of time is lengthened when said magnitude of said operating voltage decreases and shortened when said magnitude of said operating voltage increases.
6 Assignments
0 Petitions
Accused Products
Abstract
A control for an electric heating device for adjusting the duration of the device'"'"'s heating cycle in order to effectively compensate for variations in the operating voltage supplied to the device. The control includes a means for adjusting the duration of the heating cycle, wherein the adjustment means generates a control voltage for controlling the duration of the heating cycle that is a dynamic function of the magnitude of the operating voltage.
-
Citations
8 Claims
-
1. An electrical device for generating heat for a predetermined period of time, said electrical device comprising:
-
a. a heating cavity; b. a heating element powered by an operating voltage having a magnitude, said heating element being disposed within said heating cavity; c. a first circuit which generates a control voltage wherein said control voltage varies as a function of said magnitude of said operating voltage; and d. a second circuit, coupled to said first circuit, which varies the duration of said period of time as a function of said control voltage generated by said first circuit, wherein said period of time is lengthened when said magnitude of said operating voltage decreases and shortened when said magnitude of said operating voltage increases. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. An electrical device powered by an operating voltage having a magnitude wherein said electrical device generates heat for a predetermined period of time, said electrical device further comprising:
-
a. a timing circuit for controlling the length of said period of time; b. a voltage compensation means coupled to said timing circuit whereby said length of said period of time is dynamically increased when said magnitude of said operating voltage decreases and dynamically decreased when said magnitude of said operating voltage increases; and c. a temperature compensation means coupled to said timing circuit whereby said length of said period of time is increased when the initial temperature of said electrical device is decreased and decreased when the initial temperature of said electrical device is increased. - View Dependent Claims (8)
-
Specification