Electronic temperature sensing system for toaster appliances

Details Electronic temperature sensing system for toaster appliances Electronic temperature sensing system for toaster appliances

1979-11-19

1981-10-20

Grimley, Arthur T.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219497, 219505, 219494, 99329R, 307252UA, H05B 102

Patent

active

042963125

ABSTRACT:
An electronic temperature sensing system for toaster appliances and the like which is capable of providing a consistent toast color independent of toast compartment temperature at the initiation of each toasting operation, the condition of the bread to be toasted and bread loading. The system includes principally a temperature sensing device having a varying resistance versus temperature characteristic that is placed in close thermal coupling with the bread to be toasted for developing a voltage Vs as a function of temperature, and integrating means for deriving a voltage Vu that is an integrated function of the voltage Vs and represents a varying reference temperature. The difference between Vs and Vu is obtained and compared to a given voltage corresponding to a given toast color for generating a signal that terminates the toasting operation upon said given toast color being reached.

REFERENCES:
patent: 3413446 (1968-11-01), Rogers
patent: 3431400 (1969-03-01), Iida et al.
patent: 3472153 (1969-10-01), Arntz
patent: 3526272 (1970-09-01), Watts et al.
patent: 3594546 (1971-07-01), Smillie
patent: 3649905 (1972-03-01), Krupka
patent: 3678247 (1972-07-01), Sawa et al.
patent: 3679518 (1972-07-01), Andler et al.
patent: 3956978 (1976-05-01), Borley
patent: 4112589 (1978-09-01), Palfrey et al.

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