06193019 is referenced by 19 patents and cites 9 patents.

The invention concerns a device for localizing a closing fault in landing doors equipped with locks that are electrically connected series.

The localizing device includes a number of electric impedances (R

0

, R

1

, R

2

. . . R

n

) respectively mounted in parallel with said locks (

12

0

, 12

1

, 12

2

. . . 12

n

), measuring devices (

42, 44

) for measuring the total impedance of the safety chain, microprocessor (

46

) which allow to compare said measured impedance with a cross reference table of floor impedances that provides all the impedance values of the safety chain obtained by opening one or the other of the landing doors, and display (

48

) which show the floor or floors on which the breakdown occurred.

Title
Device for localization of a door breakdown
Application Number
9/282960
Publication Number
6193019 (B1)
Application Date
April 1, 1999
Publication Date
February 27, 2001
Inventor
Pascal Rebillard
Gien
US
Gerard Sirigu
Gien
US
Assignee
Otis Elevator Company
CT, US
IPC
B66B 3/00
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