FIELD: electrical engineering. SUBSTANCE: switching device has housing 1 with hole 2 and slot 3 arranged in lower part of housing square to hole 2. Shaft 4 is fitted in hole 2. Pusher 5 is installed in slot 3 for rectilinear movement. Pusher engages with sections 6, 7 diametrically arranged on surface of shaft 4 and made to Archimedean spiral. Pusher acts also on contact system of switch. EFFECT: enhanced reliability. 5 dwg
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