Michael J Ernst

US Patent:

7154732, Dec 26, 2006

Filed:

Apr 1, 2003

Appl. No.:

10/405124

Inventors:

David D. Bennett - Clinton WA, US
Michael E. Ernst - Snohomish WA, US
Randall P. Keller - Snohomish WA, US
Douglas S. York - Langley WA, US

Assignee:

The Boeing Company - Chicago IL

International Classification:

B60L 1/00
F23Q 7/24
H05B 43/02

US Classification:

361248, 307 91

Abstract:

A squib firing device is constructed to test and fire a squib load being applied to the squib firing device. A power supply of the squib firing device conditionally stores and discharges a squib firing power, which is a function of an analog OR of a first voltage from an external power source and a second voltage from a battery source of the squib firing device. When the squib firing power is being stored by the power supply, the squib firing device establishes a flow of a squib testing current through the applied squib load to thereby detect a resistance of squib load. When the squib firing power is being discharged by the power supply, the squib firing device establishes and regulates a flow of a squib firing current through the applied squib load to thereby fire squib load.