| 摘要 |
An accessory receiver is adapted for mechanical engagement with a level sensing device such as a carpenter's level or with other similar tools. The accessory receiver provides a receiver body for engagement within a box frame structure by spring action so that surfaces of the receiver and the level are forced into intimate contact. A pair of springs forces a receiver body into a flush position on the face of a box frame. A keyhole slot in the receiver is adapted for receiving a shaft for an accessory and for capturing it with snap-action onto an alignment upset for true alignment of the accessory with the tool.
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