Switch

Details Switch Switch

1985-12-19

1987-03-17

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Reciprocating contact

200164R, 200241, 200243, 200279, H01H 106, H01H 1506

Patent

active

046509356

ABSTRACT:
A contactor, relay, or other switch has stationary contacts and a movable crossbar which carries a movable contact member provided with movable contacts. The contact member has lost motion relative to the crossbar and is resiliently biased by a spring so that the crossbar can continue to move after the contacts have met the stationary contacts. The crossbar has oblique guide grooves engaging the contact member so that, during the further movement of the crossbar, the contact member is caused to move longitudinally while the movable and stationary contacts touch, thus producing a contact wiping action due to sliding of the contacts. The contact member also has an asymmetical cross section comprising a projection where, when the contacts are open, it touches the crossbar so that, in this condition, the contact member is laterally tilted. When the movable contacts meet the stationary contacts and the crossbar continues to move, the contact member rotates from its tilted position under the action of the spring, causing the movable contacts to turn on the stationary contacts, thus producing a rotary wiping action. When the contacts are opened, similar double wiping action occurs in reverse. The rotary wiping action is in a curved path generally perpendicular to the straight path of the wiping action due to sliding of the contacts.

REFERENCES:
patent: 2390344 (1945-12-01), Ayers et al.
patent: 2490020 (1949-12-01), Enzler
patent: 2712580 (1955-07-01), Nickell et al.
patent: 2758169 (1956-08-01), Weide
patent: 2879359 (1959-03-01), Pearson
patent: 3188405 (1965-06-01), Scheib, Jr.
patent: 3320392 (1967-05-01), Mullen et al.

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