Inversion spring for thermal overload relay and method for makin

Details Inversion spring for thermal overload relay and method for makin Inversion spring for thermal overload relay and method for makin

1989-09-14

1991-10-08

Graham, Matthew C.

Spring devices

Bendable along flat surface

Snap spring

200407, 267163, H01H 6100

Patent

active

050547542

ABSTRACT:
An inversion spring unit for a thermal overload relay and method for making the same, comprising a support member, a spring plate having a first end, a second end, an elongated central axis, and first and second side portions disposed on opposite sides of the central axis, the side protions being bent towards each other at the first end and attached at the first end to the support member for causing the second end of the spring plate to curve in a first direction away from the central axis, and a lug disposed intermediate the first and second ends for selective engagement with a drive portion to cause the second end of the spring plate to curve in a second direction opposite the first direction.

REFERENCES:
patent: 2777032 (1957-01-01), Burch
patent: 4250367 (1981-02-01), Rossi
patent: 4278855 (1981-07-01), Rossi

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