Metal working – Method of mechanical manufacture – Electrical device making
Patent
1975-05-27
1977-02-08
Smith, Jr., David
Metal working
Method of mechanical manufacture
Electrical device making
200 67G, H01H 1100
Patent
active
040065260
ABSTRACT:
The central element of the tumbler is hollowed to receive a hollow spring element and a piston whose ends are similar and symmetrical. One of the ends of the piston cooperates with the spring element and the other end cooperates with a contact forming element. The piston is bored with an axial groove.
REFERENCES:
patent: 3711663 (1973-01-01), Sorenson
patent: 3931487 (1976-01-01), Russenberger
Phoebe S. A.
Smith Jr. David
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