Remote personnel station alarm system

A remote personnel station alarm system comprising an external station, a remote personnel station, means at said external station for supplying air to said remote station, a gas monitor unit at said external station having means for providing a primary alarm signal upon detection of dangerous gas in said gas supply, a remote alarm unit normally at said remote station and having gas alarm warning means, means for electrically connecting said remote alarm unit to said monitor unit for providing a gas alarm warning at said remote alarm unit in response to a primary alarm signal from said monitor unit, and an electric power supply for said units;

• the improvement wherein said electrical connecting means comprises an external panel assembly electrically connected to said monitor unit and to said power supply, an electric signal wire cable having plug means for connecting said remote alarm unit to said panel assembly so that said remote unit can be disposed at said panel assembly for testing and at said remote station during operation, said panel assembly having secondary gas alarm means operable when said monitor unit produces a primary alarm signal, a panel alarm test switch at said panel assembly, and means for causing operation of said panel alarm test switch to activate said secondary alarm means at said panel assembly and to energize said gas alarm warning means at said remote alarm unit independently of the condition of said primary alarm signal means of the gas monitor unit.

A remote personnel station alarm system comprising an external station, a remote personnel station, means at said external station for supplying air to said remote station, a monitor unit at said external station having means for providing a primary alarm signal upon detection of dangerous gas in said air supply and primary alarm means responsive to said primary alarm signal, a remote alarm unit at said remote station and having gas alarm warning means, means for electrically connecting said remote alarm unit to said monitor unit for providing a gas alarm warning at said remote alarm unit in response to a primary alarm signal from said monitor unit, and an electric power supply for said units;

• the improvement wherein said electrical connecting means comprises an external panel assembly electrically connected to said monitor and remote alarm units and to said power supply, said panel assembly having secondary alarm means normally operable only when said primary alarm signal means is operated, said panel means also having a remote station indicator light, two position signal switch means at said remote station and electrically connected to said panel assembly, said signal switch means having a normal acknowledge position wherein said panel assembly secondary alarm means is controlled by the primary alarm signal of said monitor unit and the station indicator light at said panel assembly is dark, said signal switch means having a signal position which energizes said secondary alarm means and lights the station indicator light at said panel assembly independently of the condition of said primary alarm signal for summoning a panel assembly operator to said remote station.