System for controlling work temperature by a programmed controll

Details System for controlling work temperature by a programmed controll System for controlling work temperature by a programmed controll

1997-04-17

1998-04-28

Wayner, William E.

Automatic temperature and humidity regulation

With timing element

Timer other than clock

165268, 236 78B, F23N 520, G05D 1500

Patent

active

057434646

ABSTRACT:
A temperature program pattern PP for desired change of surface temperature TC1 of a work 11 with time is set by a temperature setter 31. Work temperature-difference .DELTA.t.sub.pv between the surface temperature TC1 and inside temperature TC2 of the work 11 is determined by a difference detector 34. Set value of the above temperature-difference .DELTA.t.sub.sp is given by a difference setter 35 in the form of a difference pattern DP of its change with the above surface temperature TC1. For each actual surface temperature TC1, the work temperature-difference .DELTA.t.sub.pv is compared against its set value on the difference pattern DP by a comparator 36. A slope operator 37 responds to the output from the comparator 36 and modifies slope of the temperature program pattern PP so as to cause the work temperature-difference .DELTA.t.sub.pv to follow the difference pattern DP.

REFERENCES:
patent: 1893847 (1933-01-01), Simpson
patent: 2184975 (1939-12-01), Mac Conville et al.
patent: 3311303 (1967-03-01), Noyes

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