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#1
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Door alarms?
Do those self-installed door alarms that are supposed to emit an alarm
work? The casing around the doors in my house, and I think most houses, is curved (i.e., it's not flat like the door). Doesn't the part of the alarm placed on the door have to form a magnetic connection to the piece on the casing so the alarm goes off when they come apart? I don't see how I could get them to match up if the casing part is curved; they'll meet at an angle. Another concern I saw on Amazon was that the alarm (a GE) did not go off if the door was opened too quickly. But that's what a burglar is likely to do. They just kicked in the door (which had a deadbolt lock) of my neighbor's house. |
#2
Posted to misc.consumers,misc.consumers.house
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Door alarms?
On Jan 4, 5:17*pm, jigo wrote:
Do those self-installed door alarms that are supposed to emit an alarm work? *The casing around the doors in my house, and I think most houses, is curved (i.e., it's not flat like the door). *Doesn't the part of the alarm placed on the door have to form a magnetic connection to the piece on the casing so the alarm goes off when they come apart? *I don't see how I could get them to match up if the casing part is curved; they'll meet at an angle. Another concern I saw on Amazon was that the alarm (a GE) did not go off if the door was opened too quickly. But that's what a burglar is likely to do. They just kicked in the door (which had a deadbolt lock) of my neighbor's house. I'm sure it depends on the specific model/design of the switch. It may not matter that the two elements meet at an angle. But probably will look uglier in that case. You could presumably get it to mount straight by using a small wedge of wood between it and the doorframe. Or you could cut out a small piece of the frame trim to fit around the sensor. If the switch works by detecting that the other part is resting next to it, then it shouldn't matter how quickly the door is opened. If it works by detecting a magnetic field generated by one part passing the other, then there might be a problem. The house I grew up in had a closet with a light that was controlled by a spring-loaded brass rod built into the hinge side of the door frame. Open the door, the rod extended slightly and the light came on. Elegant design, almost invisible, and even when spotted still aesthetically pleasing, and very reliable. |
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