JPH01180641U - - Google Patents

Info

Publication number

JPH01180641U

JPH01180641U JP7304588U JP7304588U JPH01180641U JP H01180641 U JPH01180641 U JP H01180641U JP 7304588 U JP7304588 U JP 7304588U JP 7304588 U JP7304588 U JP 7304588U JP H01180641 U JPH01180641 U JP H01180641U

Authority

JP

Japan

Prior art keywords

light

receiving element

filter

slit plate

smoke detector

Prior art date

1988-05-31

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

• Espacenet
• Global Dossier
• Discuss

• 239000000779 smoke Substances 0.000 claims description 8
• 230000000903 blocking effect Effects 0.000 claims 1
• 238000010586 diagram Methods 0.000 description 3
• 230000005494 condensation Effects 0.000 description 2
• 238000009833 condensation Methods 0.000 description 2
• 238000001514 detection method Methods 0.000 description 2
• 239000000428 dust Substances 0.000 description 2