The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 01, 1985
Filed:
May. 23, 1983
Elwyn H Olson, St. Paul, MN (US);
Honeywell Inc., Minneapolis, MN (US);
Abstract
A differential temperature control uses a first temperature expansion element for driving a first pivoted lever supporting a selectively operable switch and a second temperature expansion element for driving a second pivoted lever for operating the switch. The position of the switch operating lever with respect to the switch is achieved by either the first or second temperature expansion element which move the first lever and the second lever, respectively, in direct proportion to a change in the corresponding sensed temperatures. In the case of a movement produced by the temperature expansion element controlling the position of the switch, a similar temperature change sensed by the second temperature element would be needed to 'chase' the switch to restore a switch actuation relationship to produce a differential temperature control. A selective adjustment of the spacing of the second lever with respect to the switch is used to change the differential temperature that will produce a switch actuation.