US PATENT SUBCLASS 337 / 15
.~ Shunt or short circuit completion devices

Current as of: June, 1999
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337 /   HD   ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES

14  DF  ELECTROTHERMALLY ACTUATED SWITCHES {9}
15.~ Shunt or short circuit completion devices {4}
16  DF  .~.~> Bimetallic means
17  DF  .~.~> Fusible material combined with gap {1}
19  DF  .~.~> Gap with thin film dielectric (e.g., voltage-responsive)
20  DF  .~.~> With significant housing or casing structure

DEFINITION

Classification: 337/15

(under subclass 14) Subject matter including means whereby upon the failure of any selected portion of an electrical circuit or a device within the selected portion, an electrical conducting shunt circuit is automatically established around the device or the selected portion of the circuit.

(1) Note. The devices found here are especially adapted for use in closing a shunt circuit around a translating device or a loop circuit when such translating device becomes inoperative or the loop circuit is broken. These devices are generally used in series lighting circuits so that in case a lamp breaks or burns out a shunt circuit is completed around the lamp in order to keep the main circuit closed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

125, for electrothermal switch with longitudinally expansible element type with electrical shunting means.

221, for electrothermal switch of the fusible element type with electrical shunt circuit means.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers, for shunt circuit closing devices for multiple control (loop), 51.5, for short circuit closing devices actuated by the separation of coupling members and subclass 51.11 for shunt

circuit closing devices wherein the switch is in parallel with the coupling contacts.

315, Electric Lamp and Discharge Devices: Systems,

74+, and 119+ for electric lamp and electric space discharge device systems, provided with automatic shunt circuit closing means.