4. Movable or removable closures
  5. Closure condition signal or indicator
  6. Indicator at remote station

William L. Downey

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Door closer for the non-fire side of a fire-door safety installa

Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Closers – Spring and gear
Patent

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Door closer for the non-fire side of a fire-door safety installa

Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Closers – Spring and gear
Patent

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Door closer position monitor

Electricity: circuit makers and breakers – Special application – Actuated concurrently with operation or use of art device
Patent

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Door position indicator for a door closer

Movable or removable closures – Closure condition signal or indicator – Indicator at remote station
Patent

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Door security track

Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Closers – Spring and lever
Patent

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Profile ID: LFUS-PAI-P-77849

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