Electricity: circuit makers and breakers – Special application – Actuated concurrently with operation or use of art device
Reexamination Certificate
2007-01-03
2008-11-04
Friedhofer, Michael A (Department: 2832)
Electricity: circuit makers and breakers
Special application
Actuated concurrently with operation or use of art device
Reexamination Certificate
active
07446273
ABSTRACT:
A safety lockout system deactivates a safety switch to interrupt unintentional electrical current flow or signals controlled by a safety switch which is used on door-like closures. The switch generally comprises two components: one mounted on a moveable closure and the other mounted on an adjacent fixed member, such as a door frame. When the two components are aligned and closely adjacent to each other, as when the closure is in closed position, the switch allows current to flow to an electrically powered device. But when the closure is in its open position, the components are not aligned or closely arranged next to each other so that the lockout system automatically deactivates the switch which then prevents unintentional current flow to the device. The closure and the adjacent fixed member are normally locked together by a slider element which engages a keeper element when the closure is in its closed position. When the closure is moved to its open position, the slider element automatically moves to cover one of the switch components and to prevent the closure from completely closing so as to keep the components separated. That deactivates the switch until the slider is deliberately, manually moved out of its component blocking and anti-closing positions and the closure is intentionally moved into its closed position to reactivate the safety switch.
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Cantor Bernard J.
Friedhofer Michael A
Jokab Safety North America, Inc
Klaus Lisa N
LandOfFree
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