ユニークなアイデアのシングルレバーパドル、（往復電鍵）

一般的にシングルレバーパドルは構造上の問題でその中点位置がなかなか安定しにくいのですが、今回のアイデアではガイド板の両側に焼き入れ鋼の板バネを両側に付けてそのバネでレバーの先端を保持するという物です。これで常にレバーはガイド板の位置（中点）に保持されるので安定しています。バネの強さは写真に示すアジャスターを前後に動かすことで調整が出来ます。このような電鍵はスワイパー、スインガーまたはクーティーなどと呼ばれているようです。この電鍵はProng hornと命名しました。カナディアン　ロッキーに生息する野生のかも鹿の仲間で大きな角を持っています。ベースはイタリア産の大理石を使っています。

This is a newly made side swiper. I'm not sure the name of this key. I think it would be called side swiper swinger or maybe cooty.

I have just finished today. This has a very unique idea holding the lever. generally in these keys two coil springs are used to hold the lever from both side at it's neutral position, however, at the neutral position the coil springs are evenly balanced therefore the neutral position is not stable due to it's friction. By my new idea, I used two flat spring plates to squeeze the lever helped by a guide plate which is installed in just in front of the lever. The lever is always holding by the plate spring at it's neutral position. The spring tension cam be adjusted by the adjuster on the guide plate as you can see in the picture. I named this key "Prong horn" which is a wild animal in Canadian Rocky. Base is an Italian marble stone. And I made a dust cover.