Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Reexamination Certificate
2007-03-23
2008-12-23
Duda, Rina I (Department: 2837)
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
C318S560000, C318S565000
Reexamination Certificate
active
07468594
ABSTRACT:
The present invention relates to a safety system for use in protection functions, which system prevents that an error in one control circuit do not result in a function failure by using supervising functions comprising at least two sensors connected to a monitoring unit which receives and processes information about a position of a machine from both sensors and compares the results with stored values and a number of input conditions for the monitoring unit, whereby said sensors comprise means for generating data with respect to a position of a machine movement and said monitoring unit comprises means, which with respect to the result of the comparison is arranged to stop a machine movement if conditions for a stop are fulfilled. The monitoring unit is arranged to compare values from said sensors and when detecting deviating value from either one of sensors detecting a functional error with the sensors.
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Linger Matts
Svensson Goran
Duda Rina I
Gauthier & Connors LLP
Jokab Safety AB
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