JPS51130271A - Light beam type alarm - Google Patents
Light beam type alarmInfo
- Publication number
- JPS51130271A JPS51130271A JP50055200A JP5520075A JPS51130271A JP S51130271 A JPS51130271 A JP S51130271A JP 50055200 A JP50055200 A JP 50055200A JP 5520075 A JP5520075 A JP 5520075A JP S51130271 A JPS51130271 A JP S51130271A
- Authority
- JP
- Japan
- Prior art keywords
- light beam
- beam type
- type alarm
- alarm
- judge
- 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
- Geophysics And Detection Of Objects (AREA)
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
Abstract
PURPOSE: A light beam type alarm which can judge the movement direction of an object with a single set of light receiver and can be installed with easy work, and never operates incorrectly during using.
COPYRIGHT: (C)1976,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50055200A JPS51130271A (en) | 1975-05-07 | 1975-05-07 | Light beam type alarm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50055200A JPS51130271A (en) | 1975-05-07 | 1975-05-07 | Light beam type alarm |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS51130271A true JPS51130271A (en) | 1976-11-12 |
Family
ID=12992026
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50055200A Pending JPS51130271A (en) | 1975-05-07 | 1975-05-07 | Light beam type alarm |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS51130271A (en) |
-
1975
- 1975-05-07 JP JP50055200A patent/JPS51130271A/en active Pending
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