US PATENT SUBCLASS 335 / 24
.~.~.~ Trip-free (i.e., cannot be manually reclosed while overload exists)

Current as of: June, 1999
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335 /   HD   ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS

2  DF  ELECTROMAGNETICALLY ACTUATED SWITCHES {30}
6  DF  .~ Automatic circuit-interrupting devices (e.g., circuit-protective devices) {12}
21  DF  .~.~ With latch or trip means {6}
24.~.~.~ Trip-free (i.e., cannot be manually reclosed while overload exists) {1}
25  DF  .~.~.~.~> With disabling means (for contact-actuator)

DEFINITION

Classification: 335/24

(under subclass 21) Subject matter wherein the device comprises, other than in name only, significant details of structure which is operative, upon the occurance of abnormal condition in the controlled circuit, to prevent the main contacts from remaining closed or the latch from functioning regardless of the operation of a closing means, or wherein the main contacts are automatically opened upon the occurrence of an abnormal circuit condition independently of the position of a manual or other contact closing means. One example of a device to be found here consists of a manually closed switch in which a mechanical latch is operated by a handle to maintain the contacts in closed condition, the latch being operated or tripped automatically by some overload condition even though the closing lever remains in the actuated condition.

(1) Note. Where the claim recites that the device is "trip-free", without any specific details of such a feature and then recites specific details of structure which would cause the patent to be placed in a more restricted subclass below, the original patent will be placed in the more restricted subclass and officially cross-referenced back in this subclass.

SEE OR SEARCH CLASS

361, Electricity: Electrical Systems and Devices,

1+, for safety and protection systems may employ circuit interrupters which are nonreclosable.