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Class Information
Number: 102/202.4
Name: Ammunition and explosives > Igniting devices and systems > Accidental fuse ignition prevention means > Fuse device resistive shunt > Voltage responsive variable resistance shunt (e.g., semiconductor shunts)
Description: Subject matter wherein the resistive shunt has a high resistance to normal operating voltage and a lower resistance to higher than normal voltage present between the wires or a wire and the casing to pass most of the currents caused by the higher voltage through the shunt.










Patents under this class:

Patent Number Title Of Patent Date Issued
8676448 Occupant protection device Mar. 18, 2014
8487419 Method of manufacturing semiconductor apparatus, the semiconductor apparatus, and ignitor using the semiconductor apparatus Jul. 16, 2013
7992494 Detonator ignition protection circuit Aug. 9, 2011
7617777 Precision pyrotechnic display system and method having increased safety and timing accuracy Nov. 17, 2009
7227238 Integrated fuse with regions of different doping within the fuse neck Jun. 5, 2007
7194959 Precision pyrotechnic display system and method having increased safety and timing accuracy Mar. 27, 2007
6857369 Precision pyrotechnic display system and method having increased safety and timing accuracy Feb. 22, 2005
6770948 Integrated fuse with regions of different doping within the fuse neck Aug. 3, 2004
6734525 Low stress integrated circuit fusible link May. 11, 2004
6563188 Semiconductor device having multilayer passivation layer formed over memory cell fuse area May. 13, 2003
6531757 Semiconductor device fuse box with fuses of uniform depth Mar. 11, 2003
6490977 Precision pyrotechnic display system and method having increased safety and timing accuracy Dec. 10, 2002
6467414 Ignitor with printed electrostatic discharge spark gap Oct. 22, 2002
6343000 Ignition device and method for manufacturing thereof Jan. 29, 2002
6318267 Integrated circuit configuration and ignition unit Nov. 20, 2001
6220163 Electro-pyrotechnic initiation system protected against electrostatic discharges Apr. 24, 2001
6199484 Voltage-protected semiconductor bridge igniter elements Mar. 13, 2001
6173650 MEMS emergetic actuator with integrated safety and arming system for a slapper/EFI detonator Jan. 16, 2001
6133146 Semiconductor bridge device and method of making the same Oct. 17, 2000
5992326 Voltage-protected semiconductor bridge igniter elements Nov. 30, 1999
5932832 High pressure resistant initiator with integral metal oxide varistor for electro-static discharge protection Aug. 3, 1999
5672841 Inflator initiator with zener diode electrostatic discharge protection Sep. 30, 1997
5616881 Inflator socket pin collar for integrated circuit initaitor with integral metal oxide varistor for electro-static discharge protections Apr. 1, 1997
5517920 Device for sequentially firing electrical detonators May. 21, 1996
5309841 Zener diode for protection of integrated circuit explosive bridge May. 10, 1994
5179248 Zener diode for protection of semiconductor explosive bridge Jan. 12, 1993
4769734 Safety circuit for electric detonator element Sep. 6, 1988
4762067 Downhole perforating method and apparatus using secondary explosive detonators Aug. 9, 1988
4484523 Detonator, solid state type I film bridge Nov. 27, 1984
4422381 Igniter with static discharge element and ferrite sleeve Dec. 27, 1983
4307663 Static discharge disc Dec. 29, 1981
4306499 Electric safety squib Dec. 22, 1981
4070970 Electro-explosive igniters Jan. 31, 1978
4061088 Electric detonating fuse assembly Dec. 6, 1977
4049369 Photoflash lamp and multilamp unit with electrostatic protection Sep. 20, 1977
3981240 Detonating cap assembly and connecting bushing Sep. 21, 1976











 
 
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