Electrical warning system for a climbable structure
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 9, 2018
Grant Date -
Nov 2, 2017
app pub date -
Jul 18, 2017
filing date -
Jul 7, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A warning circuit for use on ladders includes a first sensor responsive to the placement of a first of a user's feet thereon and a second sensor responsive to the placement of a second of the user's feet thereon. The second sensor is electrically connected in series to the first sensor, and a relay is electrically connected in series to one of the first and second sensors. A power source has a power output terminal electrically connected in series to the other of the sensors connected in series. A sound device is electrically connected to a load output of the relay and to the power source. The load output of the relay is energized only when the first sensor is activated prior to activation of the second sensor whereupon the load output then energizes the sound device.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
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