Electricity: electrical systems and devices – Discharging or preventing accumulation of electric charge – Structurally combined with building or vehicle
Patent
1987-11-30
1990-01-02
Hix, L. T.
Electricity: electrical systems and devices
Discharging or preventing accumulation of electric charge
Structurally combined with building or vehicle
174 2, 244 1A, H05F 302
Patent
active
048917320
ABSTRACT:
A fastener for use with aircraft structures comprising composite materials has improved electrical characteristics designed to reduce damage by lightning strikes. The fastener comprises separate nut and bolt portions and a cage member (4, 1, 6). The nut (4) and the head portion of the bolt 1 both have beveled edges which in use are countersunk in the composite materials to enhance electrical contact between the fastener and aircraft structural members (2, 5). The nut (4) is captively mounted inside the cage member (6) and is moveable, within pre-determined limits, inside the cage (6) so that it may be axially aligned with and the bolt screwed therein, thus compensating for any initial non-aligment of the nut (4) and bolt (1) due to a complex shape of the aircraft structure necessitated by aerodynamic or other considerations.
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patent: 4502092 (1985-02-01), Bannink, Jr. et al.
patent: 4755904 (1988-07-01), Brick
Formica Brand Anti-Static Laminate Grade 47/Hap. Formica Corporation, 1985.
British Aerospace PLC
Brown Brian W.
Hix L. T,.
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