×

Drop height recorder

  • US 4,862,394 A
  • Filed: 01/28/1987
  • Issued: 08/29/1989
  • Est. Priority Date: 01/28/1987
  • Status: Expired due to Fees
First Claim
Patent Images

1. A drop height recorder apparatus comprising:

  • (a) a housing suitable for packaging for shipment via a transportation source from an origin point to a destination point; and

    (b) a signal generating means including;

    a housing free-fall detecting means mounted in said housing, said housing free-fall detecting means including a sensor means;

    low gain means connected to the sensor means for generating signals indicative of impact forces, means connected to the low gain means for generating trigger signals when impact forces exceed a preselected threshold, a high gain means connected to the sensor means for producing free-fall signals; and

    a controller means connected to the signal generating means, said controller including means responsive to receipt of a trigger signal preselected signals indicative of free-fall from which the time of free-fall is determined for computing drop height.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×