Smoke alarm device for a grain dryer

Claim 2

A grain dryer alarm device attached to a housing of a grain dryer, the alarm device comprising: a smoke detector housing disposed outside the dryer housing; a smoke detector mounted inside said detector housing; an elongated conduit having one end communicably connected to said smoke detector housing, said conduit attached to and extending through the dryer housing, the other end of said conduit disposed inside a hot air chamber of the dryer, said conduit receiving smoke therein and conducting the smoke to said smoke detector housing and said smoke detector when smoke occurs in the hot air chamber; dryer signal means attached to the dryer and electrically connected to said smoke detector for signaling when smoke is detected in the dryer.

Claim 3

The alarm device as described in claim 1 further including a screen mounted over the end of said conduit inside the hot air chamber of the dryer, said screen preventing contaminants in the air from entering inside said conduit.

Claim 4

The device as described in claim 1 further including an orifice disposed in the end of said elongated conduit connected to said smoke detector housing, said orifice having an opening therein less than the inside diameter of said conduit for restricting the air flow through said conduit prior to entering said smoke detector housing.

Claim 5

The alarm device as described in claim 1 wherein said device further includes a burner shutdown indicator means attached to the dryer and electrically connected to the controls of a burner in the dryer for signaling when the burner is no longer operating.

Claim 6

The alarm device as described in claim 4 further including: a transmitter electrically connected to said dryer signal means and said burner shutdown indicator means for receiving an electrical signal therefrom; a receiver positioned in a remote control station for electrically receiving a signal from said transmitter; and receiver signal means electrically connected to said receiver for signaling in the control station when the burner is no longer operating or smoke is detected in the dryer.

Claim 7

The alarm device as described in claim 1 wherein said dryer signal means includes a smoke indicator lamp and audio alarm electrically connected to said smoke detector for indicating when smoke is in the dryer.

Claim 8

A grain dryer alarm device attached to a housing of a grain dryer, the alarm device comprising: a burner shutdown indicator lamp attached to the dryer housing and electrically connected to the controls of a burner in the dryer for electrically signaling when the burner is no longer operating; a smoke detector housing disposed outside the dryer housing; a smoke detector mounted inside said detector housing; an elongated conduit having one end communicably connected to said smoke detector housing, said conduit attached to and extending through the grain dryer housing, the other end of said conduit disposed inside a hot air chamber of the dryer with a screen disposed around the opening in the end of said conduit, said conduit receiving smoke therein and conducting the smoke to said smoke detector disposed inside said smoke detector housing when smoke occurs in the hot air chamber; an orifice disposed inside the end of said conduit connected to said smoke detector housing, said orifice having an opening smaller than the inside diameter of said conduit for restricting the flow of the air in the conduit prior to entering the smoke detector housing; a smoke detector indicator lamp attached to the dryer housing and electrically connected to said smoke detector for visually signaling when smoke is detected in the dryer; and a dryer audio alarm attached to the dryer housing and electrically connected to said burner shutdown indicator lamp and said smoke detector for sounding an audio alarm when the burner is no longer operating and smoke is detected in the dryer.

Claim 9

A grain dryer alarm device attached to a housing of a grain dryer, the alarm device comprising: a burner shutdown indicator lamp attached to the dryer housing and electrically connected to the controls of a burner in the dryer for electrically signaling when the burner is no longer operating; a smoke detector housing disposed outside the dryer housing; a smoke detector mounted inside said detector housing; an elongated conduit having one end communicably connected to said smoke detector housing, said conduit attached to and extending through the grain dryer housing, the other end of said conduit disposed inside a hot air chamber of the dryer with a screen disposed around the opening in the end of said conduit, said conduit receiving smoke therein and conducting the smoke to said smoke detector disposed inside said smoke detector housing when smoke occurs in the hot air chamber; an orifice disposed inside the end of said conduit connected to said smoke detector housing, said orifice having an opening smaller than the inside diameter of said conduit for restricting the flow of the air in the conduit prior to entering the smoke detector housing; a smoke detector indicator lamp attached to the dryer housing and electrically connected to said smoke detector for visually signaling when smoke is detected in the dryer; and a dryer audio alarm attached to the dryer housing and electrically connected to said burner shutdown indicator lamp and said smoke detector for sounding an audio alarm when the burner is no longer operating and smoke is detected in the dryer.

Claim 10

The alarm device as described in claim 7 further including: a transmitter attached to the dryer housing and electrically connected to said burner shutdown indicator lamp and said smoke detector for receiving an electrical signal therefrom when the burner is no longer in operation or smoke is detected in the dryer; a receiver positioned at a remote control station for electrically receiving the signal from said transmitter; a receiver audio alarm electrically connected to said receiver for sounding an audio alarm at the remote control station; and a receiver visual alarm electrically connected to said receiver for visually signaling an alarm at the remote control station.

Claim 11

The alarm device as described in claim 7 wherein said smoke detector is a photoelectric smoke detector used when the grain dryer is heated by gas or oil.