Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1997-05-09
1998-07-28
Swann, Glen
Communications: electrical
Condition responsive indicating system
Specific condition
340514, 340546, 340636, 340693, G08B 1308
Patent
active
057867615
ABSTRACT:
A gate opening alarm for swimming pool fences and the like will sound an audible alarm when the gate is opened without first pressing a reset/pass switch button that is mounted out of children's reach. An alarm housing and a magnetically actuatable switch are mounted on either the gate or frame, with a permanent magnet mounted closely adjacent to the switch on the other gate component so that they will be separated when the gate is opened. A reset switch button is provided so that an adult may disable the alarm for a short period to pass though the gate. If the gate is not then closed, the alarm will sound. Opening the gate without pressing the reset button will cause the alarm to immediately sound. The switch is rearmed when the gate is closed after opening or after a short period if the reset button is pushed but the gate is not opened. If the gate is left opened, the alarm will sound for a period of typically 3 minutes, then will stop to check whether the gate has been closed. If the gate remains open, the alarm will again sound and the cycles of alarm and checking will continue indefinitely. Three mounting arrangements for the components are provided, one using screws for use on softer material such as wood, a strap arrangement for use with metal gates and double sided foam tape for any surface.
REFERENCES:
patent: 3943499 (1976-03-01), Dunphy
patent: 4462023 (1984-07-01), Nielsen et al.
patent: 4660027 (1987-04-01), Davis
patent: 5450064 (1995-09-01), Williams, Jr. et al.
patent: 5473310 (1995-12-01), Ko
patent: 5574429 (1996-11-01), Streeter
Duncan John R.
Gilliam Frank D.
Swann Glen
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