公开(公告)号：US4103271A

公开(公告)日：1978-07-25

申请号：US785096

申请日：1977-04-06

Applicant: John Crawshaw Taylor ,  Richard Antony Phillips

Inventor： John Crawshaw Taylor ,  Richard Antony Phillips

IPC: F01P11/16 ,  H01H37/54 ,  H01H37/04 ,  H01H37/52

CPC classification number: H01H37/54 ,  H01H37/5427

Abstract: A thermostat includes a bimetallic snap-action disc for actuating an electrical switch, a stop engaging one edge portion of the disc, a switch contact operating member engaging an opposite disc edge portion, and a fulcrum disposed between the disc edge portions and about which the disc moves whereby to amplify the movement of the disc. The fulcrum is formed by an appropriate shaping of a base wall of a thermostat housing. The switch contacting operating member is arranged to act on a leaf spring mounting a movable switch contact that engages the free end of a tongue formed by a U-shaped slot within the leaf spring whereby to permit overtravel of the disc without causing significant alteration of the disc opening temperature.