| 摘要 |
<p>A locking device for use in connection with an energy controlling apparatus, such as a valve, or regulator, to prevent unauthorized persons from changing the position of a rotatable shaft of the apparatus that controls the amount of energy that flows through the apparatus. The locking device includes a handle (1) used to manually set the position of the shaft (126). It also includes a gear (2, 2a) that is rotatably mounted in the handle (1) and is fixed to the shaft of the apparatus. A first locking mechanism (3) carried by the handle (1) mechanically and selectively couples the handle and the gear (2, 2a) through a key access to the lock (3). A spring-biased ratchet mechanism (20, 22, 22a, 23, 23a, 30, 30a) may be provided to permit rotation of the shaft (126) in one direction only. A personal locking mechanism (9', 40, 50, 100) with only a single key is selectively lockable to the handle (1) so that in the locked position it prevents access to the first locking mechanism (3). An indicator subassembly (116, 117, 118, 120, 130, 136, 137, 140) is shown, whereby the operational status or position of the valve or regulator may be viewed.</p> |
