US PATENT SUBCLASS 361 / 1
SAFETY AND PROTECTION OF SYSTEMS AND DEVICES

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


361 /   HD   ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES

1SAFETY AND PROTECTION OF SYSTEMS AND DEVICES {32}
2  DF  .~> Arc suppression at switching point (i.e., includes solid-state switch) {4}
15  DF  .~> Capacitor protection {2}
18  DF  .~> Voltage regulator protective circuits
19  DF  .~> Superconductor protective circuits
20  DF  .~> Generator protective circuits {1}
22  DF  .~> Compressor protective circuits
23  DF  .~> Motor protective condition responsive circuits {6}
35  DF  .~> Transformer protection {3}
42  DF  .~> Ground fault protection {5}
51  DF  .~> Overspeed responsive
52  DF  .~> By regulating source or load (e.g., generator field killed) {1}
54  DF  .~> Load shunting by fault responsive means (e.g., crowbar circuit) {3}
58  DF  .~> Impedance insertion
59  DF  .~> Circuit automatically reconnected only after the fault is cleared {2}
62  DF  .~> Feeder protection in distribution networks {2}
67  DF  .~> Series connected sections with faulty section disconnect {2}
71  DF  .~> Automatic reclosing {2}
76  DF  .~> With phase sequence network analyzer
77  DF  .~> Reverse phase responsive
78  DF  .~> With specific quantity comparison means {5}
88  DF  .~> With specific voltage responsive fault sensor {4}
93.1  DF  .~> With specific current responsive fault sensor {11}
103  DF  .~> Circuit interruption by thermal sensing {3}
107  DF  .~> With specific transmission line (e.g., guarded) {1}
109  DF  .~> Too large fault makes breaker inoperative
110  DF  .~> Transient nonresponsive (e.g., ignores surge on transmission line)
111  DF  .~> Transient responsive
112  DF  .~> With space discharge means
113  DF  .~> With tuned circuit
114  DF  .~> With manual or automatic opening of breaker and manual reclose
115  DF  .~> With specific circuit breaker or control structure {1}
117  DF  .~> High voltage dissipation (e.g., lightning arrester) {10}

DEFINITION

Classification: 361/1

SAFETY AND PROTECTION OF SYSTEMS AND DEVICES:

(under the class definition) Subject matter relating to the safety and protection of electrical systems and devices which

include either fault sensing means which activate a protective means to remove a fault condition or a protective means which detects and removes the fault condition.

(1) Note. This and indented subclasses do not include, as a portion thereof, the protection and safety of human beings in the vicinity of electrical apparatus. Generally, the excluded protection and safety systems are classified in the subclass which relates to the environment in which the protected human being may be found. Thus, for example, electrical conductors having grounded guarding means to protect human personnel are classified as electric conductors.

SEE OR SEARCH THIS CLASS, SUBCLASS:

600+, for switchboards and analogous devices, such as housings, some of which act as protective means.

SEE OR SEARCH CLASS

174, Electricity: Conductors and Insulators,

2+, for lightning protection systems consisting only of conductors and insulators, subclass 5 for electric shock hazard protective devices for protecting personnel, subclass 6 for earth ground, per se, and subclass 11 for electric conductor structure having means automatically responsive to the condition of the fluid which is associated with the electric conductors. 178, Telegraphy,

69, for telegraph line clearing and circuit maintenance systems.

307, Electrical Transmission or Interconnection Systems,

326+, for safety or limit control features.

314, Electric Lamp and Discharge Devices: Consumable Electrodes,

10+, for arc lamp systems having an automatic shunt or cutout.

315, Electric Lamp and Discharge Devices: Systems,

88+, especially subclass 91 for lamp and space discharge device systems having means to automatically substitute another lamp, space discharge devices, or electrode for the previous one under certain conditions of operation, subclasses 119+ for lamp and space discharge systems having an automatic shunt or cutout, and subclass 209 for lamp and space discharge device systems having periodic switch means in the supply circuit.

318, Electricity: Motive Power Systems,

434, for electric motor systems where the motor is significantly claimed having means to limit the motor load current, torque or force, as for the purpose of limiting an overload.

323, Electricity: Power Supply or Regulation Systems, 267, for condition sensing regulators with protection.

324, Electricity: Measuring and Testing,

110, for electric meter protection against electrical hazards and against the hazard of fraud.

330, Amplifiers,

250+, for semiconductor amplifiers.

331, Oscillators,

62, for oscillators provided with oscillator circuit protective means, and subclass 63 for oscillator systems provided with protection or safety devices for personnel.

340, Communications: Electrical,

635+, for electrical apparatus condition responsive signalling devices, particularly subclasses 649, 650, and 652 for grounding circuit, undesired circuit ground, and open circuit, condition responsive signalling devices, respectively.

363, Electric Power Conversion Systems,

50+, for conversion systems having protective means.

379, Telephonic Communications, 437, for telephone systems having protective means.