Japanese brass plate, GI bring back, translation?

[MattS]

A friend is cleaning out her father's house and found this. He was on a landing ship in the Pacific and ended the war in Japan. She wants to know what this says and I told her I would try to help. Thanks for any help!

[GHP]

Too difficult for me, but I think the heading (far right side) is:

空気博送器使用法

And I think it is for Air/atmosphere Transmission Equipment Use Instructions

空気--Kuki. Air, atmosphere
博 -- Hyaku/hiro. Command
送 -- Transmission
器 -- ki. Tool/equipment
使用法 -- Shiyoh-hou. Method of using

Sometimes you can get an idea of the thought when you drill down to each kanji. And sometimes you just cannot. Don't know if I've hit a foul ball or home run.

--Guy

[Nick Komiya]

It's for that contraption that delivers written messages in a capsule within a building by shooting it through tubes with compressed air. They used to impress me in movies, but in this age of e-mails it is one of those outdated extravagances that seem quite silly, though they still use it in hospitals to deliver tissue samples to the lab.

[MattS]

Thanks for the replies! As he was in the USN, she thought he might have pried it off a IJN ship. I suppose that's possible, but it may have been in a bank too. Thanks!

[GHP]

.... I suppose that's possible, but it may have been in a bank too. Thanks!

And knowing GIs (I was one for 20 years) ..... it might have been "liberated" from the Imperial Hotel!!

--Guy