US 12,267,974 B2
Electronics unit
Michael Evans, Stevenage (GB)
Assigned to MBDA UK LIMITED, Stevenage (GB)
Appl. No. 18/286,459
Filed by MBDA UK LIMITED, Stevenage (GB)
PCT Filed Apr. 27, 2022, PCT No. PCT/GB2022/051070
§ 371(c)(1), (2) Date Oct. 11, 2023,
PCT Pub. No. WO2022/229636, PCT Pub. Date Nov. 3, 2022.
Claims priority of application No. 21275048 (EP), filed on Apr. 29, 2021; and application No. 2106096 (GB), filed on Apr. 29, 2021.
Prior Publication US 2024/0196556 A1, Jun. 13, 2024
Int. Cl. G06F 1/16 (2006.01); F42B 15/34 (2006.01); H05K 5/00 (2006.01); H05K 5/06 (2006.01); H05K 7/00 (2006.01); H05K 7/14 (2006.01)
CPC H05K 5/064 (2013.01) [F42B 15/34 (2013.01); H05K 5/069 (2013.01); H05K 7/1434 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An electronics unit for a missile comprising a potted electronics in a housing, the unit being adapted to compensate for a difference in coefficient of thermal expansion between the potted electronics and the housing;
the unit comprising a ramp arrangement disposed within the housing, and the unit having an axis in the direction from the potted electronics to the ramp arrangement;
the ramp arrangement comprising a first ramp, and a second ramp slidably arranged against the first ramp at a ramp interface, which ramp interface is angled relative to the axis;
the first and second ramps being formed of different materials having different coefficients of thermal expansion;
wherein the ramp arrangement abuts the potted electronics so as to provide an interference fit between the potted electronics and the housing, and is at least partially bounded by the housing such that, when the temperature changes and the different materials expand or contract by different amounts, the first and second ramps are constrained to move axially relative to one another within the housing so as to maintain the interference fit between the potted electronics and the housing; and
wherein the materials of the first and second ramps are selected such that, when the temperature changes by an expected amount, the relative movement of the first and second ramps, is substantially equal in magnitude, and opposite in direction, to the size of a change in the axial length of the potted electronics in the housing, thereby maintaining the interference fit between the potted electronics and the housing.