公开(公告)号：US4801922A

公开(公告)日：1989-01-31

申请号：US49541

申请日：1987-05-14

申请人： Darhl R. Worrell ,  George Spector

发明人： Darhl R. Worrell ,  George Spector

IPC分类号： G08B21/18 ,  G08B21/00

CPC分类号： G08B21/182

摘要： An alarm device has a housing provided with visual and audio alarm indicators which give a warning when the temperature of a particular location is at a predetermined relatively low temperature to prevent freezing and wherein a modification is provided which has a switch that activates an enhanced audio alarm responsive to a predetermined temperature lower than the first referred to temperature.

摘要翻译： 报警装置具有外壳，其具有视觉和音频报警指示器，当特定位置的温度处于预定的相对低的温度以防止冻结时给出警告，并且其中提供具有激活增强的音频报警的开关的修改 响应于低于第一参考温度的预定温度。