Shock-resistant electronic circuit assembly

Details Shock-resistant electronic circuit assembly Shock-resistant electronic circuit assembly

H - Electricity

05

K

H05K 5/00 (2006.01) F42B 3/12 (2006.01) F42D 5/04 (2006.01)

Patent

CA 2310881

A shock-resistant electronic circuit assembly (10) is provided in which an electronic cir- cuit is encased in an encapsulation (14) that engages a surrounding enclosure (18) in shock- dispersing contact therewith. The encapsulation may have a plurality of edges (16, 16a, 16b), fins (24) or bosses (70) that bear against the enclosure. The encapsulation may include a shock- absorbing material (14f) disposed against the enclosure to protect the circuit against vibrations and a structural support material such as a casing (14e) to protect the circuit against stress. The circuit assembly (10) may be part of a sheathed initiator assembly (55) that includes a transfer member (58) for converting shock wave energy into electrical energy for the electronic circuit, and the released energy may be converted into a detonation initiation signal. Assembly (55) may be part of a detonator (100) that receives a non-electric initiation signal and detonates fol- lowing the delay determined by the electronic circuit. The detonator housing (112) or an op- tional sleeve (22) provides an enclosure for the assembly (55). The circuit encapsulation may include one or more bushings such as O-rings (14g, 14g') disposed about the circuit casing (14e).

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