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(11)

EP 3 443 547 A1

(12)

(43) Date of publication: 20.02.2019 Bulletin 2019/08 (21) Application number: 17719790.2 (22) Date of filing: 14.04.2017

(51) International Patent Classification (IPC):  G08B 21/04(2006.01) (86) International application number: PCT/US2017/027586 (87) International publication number: WO 2017/180979 (19.10.2017 Gazette 2017/42)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 15.04.2016 US 201662323266 P 13.04.2017 US 201715486897 (71) Applicant: MSA Technology, LLC Cranberry Township, PA 16066 (US)	(72) Inventors: FONZI, Henry, A., III Cranberry Township Pennsylvania 16066 (US) FRANK, William, Richard Cranberry Township Pennsylvania 16066 (US) (74) Representative: Maikowski & Ninnemann Patentanwälte Partnerschaft mbB  Postfach 15 09 20 10671 Berlin 10671 Berlin (DE)