Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1986-03-25
1988-07-26
Recla, Henry J.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200325, H01H 346
Patent
active
047602244
ABSTRACT:
An air circuit interrupter which comprises a first cam driven by the operating handle which, through a charge lever, charges an energy storing spring, a link mechanism for transmitting the stored spring force to a contact operating mechanism, a contact-opening-waiting mechanism for preventing the link mechanism from driving the contact operating mechanism to open when the contact is closed by an action of a spring force of a contacting pressure spring in the contact operating mechanism and an electromagnetic repulsive force acting on a current carrying member due to a current above a predetermined value, and an OFF operating member for opening the contact by releasing the contact-opening-waiting state of the contact-opening-waiting mechanism. The contact-opening-waiting mechanism comprises a second cam connected to the link mechanism and a trip latch having an engaging roller for engaging the second cam and an engaging portion for engaging the OFF operating member. The trip latch is constituted by a roller side latch half member having the engaging roller and an engaging side latch half member having the engaging portion, the half members being pivotally mounted on a common shaft. An elastic member is inserted between the half members so that they are biased away from each other, and the half members of the trip latch are displaced toward each other against the elastic member by the action to release the contact-opening-waiting state to open the contact.
REFERENCES:
patent: 1508148 (1924-09-01), Aalborg
patent: 1624372 (1927-04-01), Stoeltzlen
patent: 1633979 (1927-06-01), Crabbs
patent: 4468533 (1984-08-01), Kodera et al.
Mitsubishi Denki & Kabushiki Kaisha
Recla Henry J.
Sholl Linda J.
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