| 摘要 |
A shock responsive device for automatically actuating a valve or other controlled unit in response to earthquake forces, including a weight which is displaceable from a pedestal or other support by shock forces, an element at a first side of the support actuable by the weight to operate the controlled unit, and a guide structure onto which the weight can fall at a second side of the support and which is constructed to direct the weight from that side to the first side for actuation of the element and controlled unit. The guide structure preferably extends circularly about the support and is inclined to direct the weight by gravity to the first side of the support from any other location thereabout. The guide structure may be vertically movable relative to the support to return the weight to the normal position on the support for resetting of the mechanism. A spring urged operator member power actuates the controlled unit when released by displacement of the weight, and is manually operable to a cocked position by a mechanism preferably including a cocking element disposed about a rotary shaft which is adapted to be turned in one rotary direction by a coil spring type clutch located radially between the cocking element and the shaft. The coil spring may be actuable to an active condition by axial compression under the control of a manually operated part.
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