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US 4,283,749 AGranted
Apparatus for the controlled discharge of a charged object
AssigneeThe United States of America as represented by the Secretary of the Army
InventorsRudolf G. Buser, Hans E. Inslerman
Life of this patent
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Abstract
A grounding device for discharging a charged helicopter or the like comprs, in one embodiment, a nylon or Teflon.RTM. stringer having a metal weight at one end and a metal connector at the other. A plurality of spherical, graded resistance conductive ceramic beads and conductive points are strung on the stringer to form a flexible self-cleaning discharge device.
Claims18
Apparatus for the controlled discharge of a charged object which comprises:
- a first metallic member for contacting the object to be discharged;
- a second metallic member for contacting the ground;
- a plurality of conductive elements in loose contact one with the other for establishing a resistive discharge path from said first to said second metallic member;
- and
- a corresponding plurality of discharge members connected to said conductive elements to provide additional discharge paths to the atmosphere, prior to contact of said apparatus with the ground.
2 more elements
Apparatus for the controlled discharge of a charged object, which comprises:
- a first metallic member for contacting the object to be discharged;
- a second metallic member for contacting the ground;
- a plurality of conductive elements in loose contact one with the other for establishing a resistive discharge path from said first to said second metallic member, wherein each of said conductive elements comprises a generally spherical ceramic bead having a graded resistance, the apparatus further comprising:
- a non-conductive plastic stringer connected at one end to said first metallic member and at the other end to said second metallic member, said plurality of beads being strung on said stringer to form a flexible, self-cleaning discharge device.
1 more element
Apparatus for the controlled discharge of a charged object, which comprises:
- a first metallic member for contacting the object to be discharged;
- a second metallic member for contacting the ground;
- a plurality of conductive elements in loose contact one with the other for establishing a resistive discharge path from said first to said second metallic member, wherein each of said conductive elements comprises:
- a resistive element sandwiched between first and second conductive ceramic end pieces;
- each having an outwardly extending protuberance;
- and
- a rolled metal connector having a pair of opposed recesses for receiving and capturing the protuberances of the upstream and downstream ceramic end pieces.
4 more elements
Apparatus for the controlled discharge of a charged object, which comprises:
- a first metallic member for contacting the object to be discharged;
- a second metallic member for contacting the ground;
- a plurality of conductive elements in loose contact one with the other for establishing a resistive discharge path from said first to said second metallic member, wherein each of said conductive elements comprises:
- a ceramic resistance member having a pair of opposed cylindrical recesses therein, each of said recesses having a circumferential groove thereabout;
- a metallic corona-ring connector having a pair of opposed extensions for being received within the corresponding recesses in said resistance members;
- each extension having a circumferential groove thereabout;
- and
- a non-conductive snap-ring for reception in the circumferential grooves in said resistance member and metallic connector thereby to lock one into the other.
5 more elements
Apparatus for the controlled discharge of a charged object, which comprises:
- a first metallic member for contacting the object to be discharged;
- a second metallic member for contacting the ground;
- a plurality of conductive elements in loose contact one with the other for establishing a resistive discharge path from said first to said second metallic member, wherein said conductive elements comprise ceramic discs and said apparatus further comprises:
- a plurality of metallic voltage equalizer discs intermediate each n ceramic discs, n>1;
- and
- a non-conductive elongated, cylindrical sheath around said ceramic discs and said voltage equalizer discs.
3 more elements
Apparatus for the controlled discharge of a charged object, which comprises:
- a first metallic member for contacting the object to be discharged;
- a second metallic member for contacting the ground;
- a plurality of conductive elements in loose contact one with the other for establishing a resistive discharge path from said first to said second metallic member;
- and
- a variable series resistance comprising a plurality of fixed resistive elements and a plurality of variable resistance spark-gap elements sensitive to the impressed potential.
2 more elements
Apparatus for the controlled discharge of a charged object, which comprises:
- a first metallic member for contacting the object to be discharged;
- a second metallic member for contacting the ground;
- a plurality of conductive elements in loose contact one with the other for establishing resistive discharge path from said first to said second metallic member;
- a variable series resistance comprising a plurality of fixed resistive elements and a plurality of variable resistance spark-gap elements sensitive to the impressed potential, said potential sensitive variable resistance elements further comprise means for selectively switching in or out additional resistance elements.
1 more element
Dependencies are inferred from the claim text.