Thermal switch
First Claim
1. A thermal switch including a switch body comprising a base, a plurality of outer terminals held on said base to be electrically independent of each other and respectively having a fixed contact, a plurality of movable contact springs corresponding in number to said outer terminals and respectively having a movable contact contactable with each of said fixed contacts, respective said movable contact springs being electrically connected with each other, a movable-contact-spring fixing plate held onto the base for fixing said movable contact springs in mutually parallel relation in the horizontal direction, and a plurality of bimetals each having a set-temperature different from that of the other and operating respectively independently so as to separate the movable contact of one of the movable contact springs from the fixed contact, whereby one of the movable contact springs operated by one of said bimetals which has said set-temperature relatively lower than the other forms resetting-type switching contacts and the other of the springs of the set-temperature relatively higher forms non-resetting type switching contacts.
1 Assignment
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Accused Products
Abstract
A thermal switch comprising a plurality of outer terminals respectively having a fixed contact, a movable contact spring divided into a plurality of mutually parallel contact spring parts each having a movable contact for contacting with and separating from the fixed contact and a plurality of bimetals respectively operating at differently set temperatures and provided so as to independently actuate the respective contact spring parts, whereby resetting-type contacts are reliably opened and closed in response to fluctuations in the atmospheric temperature through one of the bimetals which has a relatively lower first set-temperature and, when the particular bimetal of the relatively lower first set-temperature fails to operate and the atmospheric temperature further rises, non-resetting-type contacts are reliably opened through the other bimetal having a relatively higher second set-temperature.
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Citations
11 Claims
- 1. A thermal switch including a switch body comprising a base, a plurality of outer terminals held on said base to be electrically independent of each other and respectively having a fixed contact, a plurality of movable contact springs corresponding in number to said outer terminals and respectively having a movable contact contactable with each of said fixed contacts, respective said movable contact springs being electrically connected with each other, a movable-contact-spring fixing plate held onto the base for fixing said movable contact springs in mutually parallel relation in the horizontal direction, and a plurality of bimetals each having a set-temperature different from that of the other and operating respectively independently so as to separate the movable contact of one of the movable contact springs from the fixed contact, whereby one of the movable contact springs operated by one of said bimetals which has said set-temperature relatively lower than the other forms resetting-type switching contacts and the other of the springs of the set-temperature relatively higher forms non-resetting type switching contacts.
Specification