Electricity: motive power systems – Automatic and/or with time-delay means – Radiant energy
Reexamination Certificate
2005-07-05
2005-07-05
San Martin, Edgardo (Department: 2837)
Electricity: motive power systems
Automatic and/or with time-delay means
Radiant energy
C250S221000, C340S550000, C340S555000, C049S025000, C049S031000
Reexamination Certificate
active
06914401
ABSTRACT:
A sensor arrangement for monitoring a spatial area of least one motor-driven wing of a door includes a plurality of primary transmitters emitting beams of radiation toward a spatial area, and a plurality of primary receivers arranged to receive radiation from the primary transmitters which is reflected in the spatial area, the receivers generating a signal to actuate the motor driving the wing. A plurality of auxiliary transmitters are arranged next to respective primary receivers and emit auxiliary beams of radiation toward the spatial area, and a plurality of auxiliary receivers are arranged next to the primary transmitters to receive radiation from the auxiliary transmitters. A transmitter emits radiation and a receiver reacts to a reflection of the beam differing in intensity and produces a signal which controls the actuation of the door. Each transmitter is associated with an auxiliary receiver and each receiver is associated with an auxiliary transmitter in order to develop a sensor arrangement with increased security and reliability.
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Cohen & Pontani, Lieberman & Pavane
Dorma GmbH & Co. KG
Martin Edgardo San
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