Metal working – Method of mechanical manufacture – Electrical device making
Patent
1989-08-17
1990-07-31
Echols, P. W.
Metal working
Method of mechanical manufacture
Electrical device making
H01H 1100
Patent
active
049440837
ABSTRACT:
An electrical switch construction and method of making the same are provided, the switch construction having a support carrying a pair of spaced apart first and second fixed contacts and a movable switch blade unit carrying a contact unit for being disposed in contact with the first fixed contact and out of contact with the second fixed contact when the switch blade unit is in a first position thereof and for being disposed in contact with the second fixed contact and out of contact with the first fixed contact when the switch blade unit is in a second position thereof. The switch blade unit comprises a first flexible switch blade having opposed ends one of which is secured to the support and the other of which carries a first part of the contact unit for making or breaking contact with the first fixed contact and a second flexible switch blade having opposed ends one of which is secured to the first switch blade to be carried thereby and the other of which is spaced from the other end of the first switch blade and carries a second part of the contact unit for making or breaking contact with the second fixed contact. The first switch blade having an abutment for engaging the second switch blade with an impact force when the switch blade unit is being moved from the second position thereof to the first position thereof and a contact welded condition exists between the second fixed contact and the second part of the contact unit.
REFERENCES:
patent: 847981 (1907-03-01), Brown
patent: 1269917 (1918-06-01), Field
patent: 3047771 (1962-07-01), Clark
patent: 3602863 (1971-08-01), Place
Echols P. W.
Robertshaw Controls Company
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