| 摘要 |
An impact monitor or shock indicator for sensing and indicating the occurence of excessive damaging impacts or shock loads, such as might occur to goods in transit or handling or which may even occur in the utilization of certain types of instruments, devices or machinery through accident or inadvertence and which could cause physical damage or injury or malfunction of the goods involved. A calibrated device is provided having a pair of opposed spring-loaded balls which serve as inertial masses retained in opposed ball seats which are slidably mounted in upstanding resilient or yieldable support arms which are secured to a common base. The maximum spacing between the opposed ball seats is limited by opposed abutments extending exteriorly of the ball seats in the form of a sleeve or cap which is slidably movable downwardly over the support arms and the ball seats into engagement with the base. Anyone of various forms of camming means can be utilized to yieldably displace the support arms inwardly relatively to each other in opposition to their normal stance so as to further energize or compress the spring and enhance or increase the stability of the shock indicator beyond its calibrated limits for the purpose of delivery of shipment of the shock indicator to the user. The support arms may be provided with supplementary ball seating surfaces to engage the balls when the support arms are displaced to this described transport position. Withdrawal or disengagement of the support arm displacing means serves to restore the impact monitor to its calibrated stability value for its intended operative use.
|
