Title:
High water alarm for drainage sump
United States Patent 3399399
US Patent References:
Electric alarm device
- - 2786195
Portable fire alarm
- - 2816280
Condition responsive control circuits
- - 3014159
Thermally responsive electrical control systems
- - 3032690
Alarm apparatus for refrigeration systems and the like
- - 3059443
Electric alarm device
- - 2786195
Portable fire alarm
- - 2816280
Condition responsive control circuits
- - 3014159
Thermally responsive electrical control systems
- - 3032690
Alarm apparatus for refrigeration systems and the like
- - 3059443
Inventors:
Apfelbaum, Jerome G.
Publication Date:
08/27/1968
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Export Citation:
Assignee:
FAULTSENSORS INC
Primary Class:
Other Classes:
340/594, 320/160, 340/620, 417/63, 340/691.800, 340/585, 340/654, 340/384.700
International Classes:
G01F23/24
US Patent References:
| 3114095 | Storage battery charging system utilizing a controlled rectifier switch responsive to the battery-load voltage |