Invention Grant
- Patent Title: Detection device
- Patent Title (中): 检测装置
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Application No.: US3651442DApplication Date: 1969-12-10
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Publication No.: US3651442APublication Date: 1972-03-21
- Inventor: VASEL ALFRED W
- Applicant: VASEL ALFRED W
- Assignee: Alfred W Vasel
- Current Assignee: Alfred W Vasel
- Priority: US88396969 1969-12-10
- Main IPC: G08B17/12
- IPC: G08B17/12 ; H01C7/08
Abstract:
An optical fire detector in which a red-responsive cell and a blue-responsive cell are connected into a voltage divider circuit, and a third cell non-responsive to a specific frequency band is connected between the junction of the first two cells and the input of an amplifier of an alarm circuit.
Information query
