Circuit for measuring absolute time lapse between impact and detonation

USH666H · kind H · statutory invention registration

Assignee

• The United States of America as represented by the Secretary of the Army · US

Inventor

• Robert Milton · New Market, US

Key dates

• Grant date: Aug 1, 1989

Classification

• Technology area (CPC —): General

Abstract

Insulating material is used to attach a conducting foil patch to conductive urface of motor case. The patch is a part of an open electrical circuit, along with a power source, timer and connecting wires until impact which causes the patch to collapse and come in contact with the motor surface, thus closing the circuit. When the circuit is closed and voltage is present, the timer records the time of impact and continues to count. A piezo-electric pin attached to motor case and connected to the timer creates voltage pulse upon detonation of motor case and this pulse stops the timer. Thus, accurate measurements of time lapse between impact and detonation can be made.