Control system and control device for controlling a heating unit and method of making and operating the same
US4323764A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1980 |
| Grant date | Apr 6, 1982 |
| Priority date | — |
| Expiry date | Jul 21, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C10/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control system for a heating unit that has controls for comparing a variable electrical signal that has a value in relation to the output temperature of the heating unit and a selected electrical signal that has a value in relation to a selected temperature setting to control the operation of the heating unit to tend to produce an output temperature substantially equal to the selected temperature, the controls including a control device having a rod and tube temperature sensing unit for providing linear motion of a part thereof in relation to the output temperature of the heating unit and having a potentiometer provided with an electrical output producing part operatively interconnected to the movable part of the rod and tube unit so as to produce the variable electrical signal in relation to the output temperature of the heating unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.