| 361 / | HD | ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES |
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| 139 | DF | CONTROL CIRCUITS FOR ELECTROMAGNETIC DEVICES {7} |
| 160 |  | .~ For relays or solenoids {11} |
| 161 | DF | .~.~> Including thermal device {3} |
| 166 | DF | .~.~> Plural relays or solenoids sequentially operated {2} |
| 170 | DF | .~.~> Condition responsive (e.g., external circuit condition) {9} |
| 189 | DF | .~.~> Plural switches in control circuit {1} |
| 191 | DF | .~.~> Plural relay or solenoid load selectively operated {1} |
| 194 | DF | .~.~> Holding means |
| 195 | DF | .~.~> Time delay {3} |
| 203 | DF | .~.~> With oscillator |
| 204 | DF | .~.~> With magnetic amplifier or saturable reactor |
| 205 | DF | .~.~> Threshold device (e.g., SCR, thyratron) |
| 206 | DF | .~.~> Particular relay or solenoid {4} |