machining to 0.0001 inch tolerances

Impact Register manufactures mechanical impact recorders and shipment indicators that document shocks and vibrations experienced by high-value freight in transit. The company has been in continuous operation since 1914, and in 1915 William P. Savage received U.S. Patent No. 1,125,731 for the Impact Register. Its recorders use mechanical G-force sensing that needs no power or signal, with a battery powering the chart-drive motor to create a continuous, time-stamped record.

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drop detectionmechanical impact monitoringmulti-axis acceleration recordingpneumatic dampingstatic and dynamic calibration