Fixed/movable supervised alarm loop
AssigneeHoneywell Inc.
InventorAnil Saigal
Life of this patent
Estimating the term…
Abstract
An alarm sensing loop for selectively monitoring at least first and second alarm sensors includes terminals for connection to a source, a selection circuit connected to the terminals and having first and second states, a first alarm sensor connected to the selection circuit to be supervised continuously when the selection circuit is in its first and second states, a second alarm sensor, and a selection state sensing circuit for allowing supervision of the second alarm sensor when the selection circuit is in its first state and for preventing supervision of the second alarm sensor when the selection circuit is in its second state.
Claims18
An alarm sensing loop for selectively supervising at least first and second alarm sensors comprising:
- terminal means for connection to a source;
- selection means connected to said terminal means and having first and second states;
- first alarm sensing means connected to said selection means to be continuously supervised when said selection means is in said first and second states;
- second alarm sensing means;
- and,
- selection state sensing means connected to said second alarm sensing means and responsive to said selection means such that said second alarm sensing means is supervised when said selection means is in said first state and is not supervised when said selection means is in said second state.
An alarm sensing loop for selectively monitoring at least first and second alarm sensors comprising:
- terminal means for connection to a source;
- selection means connected to said terminal means and having a first state for allowing current flow in a first direction through said loop and a second state for allowing current flow in a second direction through said loop;
- first alarm sensing means connected to said selection means to be continuously supervised when said selection means is in said first and second states;
- second alarm sensing means;
- and,
- current direction sensing means connected to said second alarm sensing means for permitting supervision of said second alarm sensing means when said current flow is in said first direction and responsive to said selection means for preventing supervision of said second alarm sensing means when said current flow is in said second direction.
Dependencies are inferred from the claim text.