|
US1829708A
|
|
Controlling device for power operated valves
|
|
US1742892A
|
|
Control device for power cylinders
|
|
US1723399A
|
|
Valve-operating device
|
|
US1749310A
|
|
Valve-operating device
|
|
US1005259A
|
|
Electromechanical indicator.
|
|
US1005260A
|
|
Electrocmechanical controller.
|
|
US876423A
|
|
Device for indicating the position of water or sluice gate valves.
|
|
US785134A
|
|
Flushing-gate for sewers, &c.
|
|
US771959A
|
|
Water-gate.
|
|
US793753A
|
|
Mechanism for operating water or other fluid gates.
|
|
US714551A
|
|
Water-gate.
|
|
US707825A
|
|
Water-gate.
|
