Access protection device for a prohibited area
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 9, 2009
Grant Date -
Mar 3, 2005
app pub date -
Aug 3, 2004
filing date -
Aug 27, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to an access protection device for a physical area which can be switched on and off in a controlled manner, comprising a fixed part, at least one movable part for closing an access opening in the fixed part and, for each movable part, a tumbler device having a magnetic circuit, which comprises a magnetizable yoke located on the movable part and an electromagnet which can be closed by means of the yoke, it being possible to regulate the locking force of said electromagnet by means of a current regulator, a first and a second desired value being predetermined for the current regulator, and it being possible to periodically carry out a controlled jump from the first to the second desired value, it being possible to measure the time from the beginning of the controlled jump to the time at which the second desired value is reached.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully