JPS5426697A - Photo electric type smoke detector using battery - Google Patents
Photo electric type smoke detector using batteryInfo
- Publication number
- JPS5426697A JPS5426697A JP9269277A JP9269277A JPS5426697A JP S5426697 A JPS5426697 A JP S5426697A JP 9269277 A JP9269277 A JP 9269277A JP 9269277 A JP9269277 A JP 9269277A JP S5426697 A JPS5426697 A JP S5426697A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- smoke detector
- electric type
- type smoke
- photo electric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Fire-Detection Mechanisms (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
PURPOSE: To reduce the wear of cells and to make longer the life, by avoding the dependency on the cell voltage for the amount of illumination, through the connection of the switching element controlled with the output of oscillation circuit to the circuit connecting the light emitting element in series with the constant current circuit.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9269277A JPS5426697A (en) | 1977-07-30 | 1977-07-30 | Photo electric type smoke detector using battery |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9269277A JPS5426697A (en) | 1977-07-30 | 1977-07-30 | Photo electric type smoke detector using battery |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5426697A true JPS5426697A (en) | 1979-02-28 |
Family
ID=14061537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9269277A Pending JPS5426697A (en) | 1977-07-30 | 1977-07-30 | Photo electric type smoke detector using battery |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5426697A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02112097A (en) * | 1988-10-21 | 1990-04-24 | Matsushita Electric Works Ltd | Intermittent drive type analog circuit |
-
1977
- 1977-07-30 JP JP9269277A patent/JPS5426697A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02112097A (en) * | 1988-10-21 | 1990-04-24 | Matsushita Electric Works Ltd | Intermittent drive type analog circuit |
JPH0632141B2 (en) * | 1988-10-21 | 1994-04-27 | 松下電工株式会社 | Intermittent drive circuit for photoelectric smoke detector |
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