| 248 / | HD | SUPPORTS |
| 200 | DF | BRACKETS {11} |
| 274.1 | DF | .~ Adjustable {5} |
| 276.1 | DF | .~.~ Plural joints {7} |
| 278.1 | ![]() | .~.~.~ Vertical pivot at right angle to horizontal pivot {3} |
| 279.1 | DF | .~.~.~.~> Having sliding joints |
| 280.11 | DF | .~.~.~.~> Counterbalanced |
| 281.11 | DF | .~.~.~.~> Having parallel arms |