DONALD M STONESTROM
Engineers in West Chester, PA
License number
Pennsylvania PE006213E
Category
Engineers
Type
Professional Engineer
Address
Address
West Chester, PA 19382
Personal information
See more information about DONALD M STONESTROM at radaris.comName
Address
Phone
W Chester, PA
1385 Springton Ln, West Chester, PA 19380
1408 Carroll Brown Way, West Chester, PA 19382
Professional information
See more information about DONALD M STONESTROM at trustoria.com
Static Discharge Disc
Static Discharge Disc
US Patent:
4307663, Dec 29, 1981
Filed:
Nov 20, 1979
Appl. No.:
6/096079
Inventors:
Donald M. Stonestrom - West Chester PA
Assignee:
ICI Americas Inc. - Wilmington DE
International Classification:
F42B 318
US Classification:
1022024
Abstract:
Electroexplosive device and static discharge element therefor. The electroexplosive device herein has a cylindrical metallic casing which is open at one end and closed at the other end, a bridge element and lead wires therefor, a static discharge disc surrounding the lead wires for preventing accidental ignition due to static electricity, and a ferrite sleeve surrounding the lead wires to prevent accidental initiation due to radio frequency currents. The static discharge element comprises a nonconductive circular substrate having a slotted opening for the lead wires, and a conductive coating layer on at least one face of the substrate to conduct electricity from the leads to the casing in the event of electrostatic discharge. This conductive layer should be in electrical contact with the casing but not with the lead wires; to that end the substrate is left uncoated in the immediate vicinity of the opening. The ferrite sleeve is in electrical contact with the casing through a solder layer but is electrically insulated from the lead wires by a nonconductive thermal plastic material.