Electricity: circuit makers and breakers – Multiple circuit control – Pivoted contact
Patent
1992-05-26
1992-12-15
Broome, Harold
Electricity: circuit makers and breakers
Multiple circuit control
Pivoted contact
200467, H01H 2100, H01H 2104
Patent
active
051719452
ABSTRACT:
A contact switch includes a casing, and a first, a second, and a third conductor mounted to the casing. Each of the first, second and third conductors has a leg portion extending downward and out of the casing. A spring mounting plate member extends from the leg portion of the first conductor inside the casing and has an upward end flange extending from one end of the mounting plate member. The mounting plate member has an opening and a top end portion provided with a gap to access the opening. A spring engaging member projects upward from the mounting plate member and is spaced from the end flange. The spring engaging member is provided with a pair of oppositely disposed notches. A movable contact arm has one end abutting the end flange and is turnable about the point of contact between the movable contact arm and the end flange. A helical spring member has a curved end attached to the spring engaging member at the notches thereof. The spring member has a second end provided with a rod portion that passes through the opening of the end flange and a hook portion extending from the rod portion and engaging the movable contact arm. The intermediate portion of the helical spring member is pressed to move the contact arm upward to break contact with the third conductor and to make contact with the second conductor.
REFERENCES:
patent: 4673778 (1987-06-01), Lewandowski et al.
Broome Harold
Shin Juich Corp.
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