Appeal No. 95-3141
Application No. 08/070,863
The invention relates to an elevator car position
detector and is illustrated by reference to representative
independent claim 2, reproduced as follows:
2. An elevator car position detecting apparatus for
detecting the position of an elevator car along an elevator
shaft, said elevator car position detecting apparatus
comprising:
at least first and second operating devices provided on a
side wall of the elevator shaft, each operating device
provided at an operation position defined along the elevator
shaft, each of said at least first and second operating
devices including a plurality of operating elements disposed
in a row in a direction perpendicular to the direction of
travel of the elevator car in such positions that the
operation positions can be encoded by using two or more ON/OFF
signals, the plurality of operating elements of said first
operating device being arranged such that at least one of the
operating elements is misaligned with at least one of the
operating elements of said second operating device along the
direction of travel of the elevator car; and
a detecting device provided on said elevator car, said
detecting device including a plurality of detecting elements
provided corresponding to said operating elements so that,
when said elevator car is at any one of said operation
positions, some of said detecting elements are operated by the
corresponding operating elements and thereby generate a signal
coding the position of said elevator car wherein the operating
elements of said operating devices are shielding plates, and
wherein each of said detecting elements of said detecting
device comprises a transmitter portion and a receiver portion
which can be shielded from each other by one of the shielding
plates.
The examiner relies on the following references:
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